blue window

.clang-format

@@ -49,6 +49,9 @@ IndentWidth: 4
 InsertNewlineAtEOF: true
 MacroBlockBegin: ''
 MacroBlockEnd: ''
+Macros:
+  - 'EachIndex(it, count)=(uint64 it = 0; it < (count); ++it)'
+  - 'EachNode(it, Type, first)=(Type* it = first; it != 0; it = it->next)'
 NamespaceIndentation: All
 ObjCSpaceAfterProperty: true
 PenaltyBreakBeforeFirstCallParameter: 100
@@ -63,11 +66,5 @@ SortIncludes: CaseInsensitive
 SpacesInAngles: Never
 SpacesInContainerLiterals: false
 Standard: Cpp11
-StatementMacros: 
-  - UPROPERTY
-  - UCLASS
-  - USTRUCT
-  - GENERATED_BODY
-  - UENUM
 TabWidth: 4
 ...

.gitmodules

@@ -1,9 +1,14 @@
 [submodule "External/Imgui"]
 	path = External/Imgui
 	url = https://github.com/ocornut/imgui.git
-[submodule "Juliet/external/stb"]
-	path = Juliet/external/stb
-	url = https://github.com/nothings/stb.git
+	# Pinned to v1.93.0 (c1aaac65e)
+
 [submodule "Juliet/external/xxHash"]
 	path = Juliet/external/xxHash
 	url = https://github.com/Cyan4973/xxHash.git
+	# Pinned to v0.8.4 (c87183a77)
+
+[submodule "Juliet/external/stb_sprintf"]
+	path = Juliet/external/stb_sprintf
+	url = https://github.com/nothings/stb_sprintf.git
+	# Pinned to v1.10 / commit 2ffb3379e

Juliet/core/core.c

@@ -27,4 +27,4 @@ internal int32 safe_cast_int32(int64 val)
 
 #define STB_SPRINTF_IMPLEMENTATION
 #define STB_SPRINTF_STATIC
-#include "external/stb/stb_sprintf.h"
+#include "external/stb_sprintf/stb_sprintf.h"

Juliet/core/core.h

@@ -7,7 +7,7 @@
 
 #define STB_SPRINTF_DECORATE(name) juliet_##name
 #define STB_SPRINTF_STATIC
-#include "external/stb/stb_sprintf.h"
+#include "external/stb_sprintf/stb_sprintf.h"
 
 #define internal static
 #define global static
@@ -73,16 +73,25 @@
 // =============================================================================
 // For loop helpers
 
+#define DeferLoop(begin, end) for (int _i_ = ((begin), 0); !_i_; ++_i_, (end))
+
 #define EachIndex(it, count) (uint64 it = 0; it < (count); ++it)
+#define EachNode(it, Type, first) (Type* it = first; it != 0; it = it->next)
 
 // =============================================================================
 // Memory Helpers
 
 #define MemoryCopy(dst, src, size) memmove((dst), (src), (size))
 #define MemorySet(dst, src, size) memset((dst), (src), (size))
+#define MemoryCompare(a, b, size) memcmp((a), (b), (size))
 
 #define MemoryZero(ptr, size) memset((ptr), 0, (size))
 #define MemoryZeroStruct(s) MemoryZero((s), sizeof(*(s)))
+#define MemoryZeroArray(arr) MemoryZero((arr), sizeof(arr))
+
+#define MemoryMatch(a, b, size) (MemoryCompare((a), (b), (size)) == 0)
+#define MemoryMatchStruct(a, b) MemoryMatch((a), (b), sizeof(*(a)))
+#define MemoryMatchArray(a, b) MemoryMatch((a), (b), sizeof(a))
 
 // =============================================================================
 // Asserts
@@ -119,30 +128,44 @@
 #define CheckNil(nil, ptr) ((ptr) == 0 || (ptr) == nil)
 #define SetNil(nil, ptr) ((ptr) = nil)
 
+// Doubly-linked-lists
 // clang-format off
-#define DLL_insert_NPZ(nil, first, last, ptr, node, next, previous)                                                                   \
+#define DLL_insert_next_prev_zero(nil, first, last, ptr, node, next, previous)                                                                   \
     (CheckNil(nil, first) ? ((first) = (last) = (node), SetNil(nil, (node)->next), SetNil(nil, (node)->previous))                     \
      : CheckNil(nil, ptr) ? ((node)->next = (first), (first)->previous = (node), (first) = (node), SetNil(nil, (node)->previous))     \
      : ((ptr) == (last))  ? ((last)->next = (node),  (node )->previous = (last), (last ) = (node), SetNil(nil, (node)->next))         \
                           : (((CheckNil(nil, ptr) && CheckNil(nil, (ptr)->next)) ? (0) : ((ptr)->next->previous = (node))),           \
                          ((node)->next = (ptr)->next), ((ptr)->next = (node)), ((node)->previous = (ptr))))
-// clang-format on
-#define DLL_push_back_NPZ(nil, first, last, node, next, previous)                                                      \
-    DLL_insert_NPZ(nil, first, last, last, node, next, previous)
-#define DLL_remove_NPZ(nil, first, last, node, next, previous)                                                         \
+#define DLL_push_back_next_prev_zero(nil, first, last, node, next, previous)                                           \
+    DLL_insert_next_prev_zero(nil, first, last, last, node, next, previous)
+#define DLL_remove_next_prev_zero(nil, first, last, node, next, previous)                                              \
     (((node) == (first) ? (first) = (node)->next : (0)), ((node) == (last) ? (last) = (last)->previous : (0)),         \
      (CheckNil(nil, (node)->previous) ? (0) : ((node)->previous->next = (node)->next)),                                \
      (CheckNil(nil, (node)->next) ? (0) : ((node)->next->previous = (node)->previous)))
+// clang-format on
+
+// Single link double head lists (= queues)
+#define SLL_queue_push_next_zero(nil, first, last, node, next)                                                         \
+    (CheckNil(nil, first) ? ((first) = (last) = (node), SetNil(nil, (node)->next))                                     \
+                          : ((last)->next = (node), (last) = (node), SetNil(nil, (node)->next)))
 
 // Single (link & head) lists (= stacks)
-#define SLL_stack_push_node(first, node, next) ((node)->next = (first), (first) = (node))
-#define SLL_stack_pop_node(first, next) ((first) = (first)->next);
-#define SLL_stack_push(first, node) SLL_stack_push_node(first, node, next)
-#define SLL_stack_pop(first) SLL_stack_pop_node(first, next)
+#define SLL_stack_push_next(first, node, next) ((node)->next = (first), (first) = (node))
+#define SLL_stack_pop_next(first, next) ((first) = (first)->next);
 
 // Double linked list helpers
-#define DLL_push_back(first, last, node) DLL_push_back_NPZ(0, first, last, node, next, previous)
-#define DLL_remove(first, last, node) DLL_remove_NPZ(0, first, last, node, next, previous)
+#define DLL_push_back_next_prev(first, last, node, next, previous)                                                     \
+    DLL_push_back_next_prev_zero(0, first, last, node, next, previous)
+#define DLL_remove_next_prev(first, last, node, next, prev) DLL_remove_next_prev_zero(0, first, last, node, next, prev)
+#define DLL_push_back(first, last, node) DLL_push_back_next_prev_zero(0, first, last, node, next, previous)
+#define DLL_remove(first, last, node) DLL_remove_next_prev_zero(0, first, last, node, next, previous)
+
+// Queue helpers
+#define SLL_queue_push(first, last, node) SLL_queue_push_next_zero(0, first, last, node, next)
+
+// Stack helpers
+#define SLL_stack_push(first, node) SLL_stack_push_next(first, node, next)
+#define SLL_stack_pop(first) SLL_stack_pop_next(first, next)
 
 // =============================================================================
 // Helpers
@@ -157,6 +180,13 @@
 
 #define ArrayCount(arr) (sizeof(arr) / sizeof((arr)[0]))
 
+#if ARCH_64BIT
+# define IntFromPtr(ptr) ((uint64)(ptr))
+#else
+# error Missing pointer to integer cast for this architecture
+#endif
+#define PtrFromInt(i) (void*)(i)
+
 // =============================================================================
 // Core Types
 

Juliet/core/core_arena.c

@@ -101,7 +101,7 @@ internal void* arena_push(Arena* arena, uint64 size, uint64 align, bool32 zero)
         }
 
         new_block->base_position = current->base_position + current->reserved;
-        SLL_stack_push_node(arena->current, new_block, previous);
+        SLL_stack_push_next(arena->current, new_block, previous);
 
         current  = new_block;
         pos_pre  = AlignPow2(current->position, align);

Juliet/core/core_defines.h

@@ -39,6 +39,13 @@
 # error Compiler not supported.
 #endif
 
+// ========================================================================== //
+// Architecture
+
+#if defined(ARCH_X64)
+# define ARCH_64BIT 1
+#endif
+
 // ========================================================================== //
 // Language
 

Juliet/core/core_hash.c

@@ -21,5 +21,6 @@ internal uint64 uint64_hash_from_string(String8 string)
 
 internal uint64 uint64_hash_from_seed_string(uint64 seed, String8 string)
 {
-    return 0;
+    uint64 result = XXH3_64bits_withSeed(string.str, string.size, seed);
+    return result;
 }

Juliet/core/core_math.h

@@ -14,6 +14,17 @@ union Vector2f
     float32 v[2];
 };
 
+typedef union Vector2i Vector2i;
+union Vector2i
+{
+    struct
+    {
+        int32 x;
+        int32 y;
+    };
+    int32 v[2];
+};
+
 // =============================================================================
 // Rect Types
 

Juliet/core/core_string.c

@@ -1,6 +1,57 @@
+#ifndef MEM_STATIC
+# define MEM_STATIC
+# define MEM_API static inline
+# include "external/memfun/memfun.h"
+#endif
+
+// =============================================================================
+// String conversions
+
+internal bool32 char_is_upper(uint8 c)
+{
+    return ('A' <= c && c <= 'Z');
+}
+
+internal bool32 char_is_lower(uint8 c)
+{
+    return ('a' <= c && c <= 'z');
+}
+
+internal bool32 char_is_slash(uint8 c)
+{
+    return (c == '/' || c == '\\');
+}
+
+internal uint8 lower_from_char(uint8 c)
+{
+    if (char_is_upper(c))
+    {
+        c += ('a' - 'A');
+    }
+    return c;
+}
+
+internal uint8 upper_from_char(uint8 c)
+{
+    if (char_is_lower(c))
+    {
+        c += ('A' - 'a');
+    }
+    return c;
+}
+
+internal uint8 correct_slash_from_char(uint8 c)
+{
+    if (char_is_slash(c))
+    {
+        c = '/';
+    }
+    return c;
+}
+
 // ========================================================================== //
 // String Length
-#include "core/core_arena.h"
+
 internal uint64 cstring8_length(uint8* cstring)
 {
     uint64 length = 0;
@@ -85,7 +136,51 @@ internal String32 str32_cstring(uint32* cstring)
     return result;
 }
 
-// ========================================================================== //
+// =============================================================================
+// String Matching
+
+internal bool32 str8_match(String8 a, String8 b, StringMatchFlags flags)
+{
+    bool32 result = 0;
+    if (a.size == b.size && flags == 0)
+    {
+        result = MemIsEqual(a.str, b.str, b.size);
+    }
+    else if (a.size == b.size && flags == StringMatchFlag_CaseInsensitive)
+    {
+        result = MemCompareI(a.str, b.str, a.size) == 0;
+    }
+    else if (a.size == b.size || (flags * StringMatchFlag_RightSideSloppy))
+    {
+        bool32 case_insensitive  = (flags & StringMatchFlag_CaseInsensitive);
+        bool32 slash_insensitive = (flags & StringMatchFlag_SlashInsensitive);
+        uint64 size              = Min(a.size, b.size);
+        result                   = 1;
+        for EachIndex(i, size)
+        {
+            uint8 at = a.str[i];
+            uint8 bt = b.str[i];
+            if (case_insensitive)
+            {
+                at = upper_from_char(at);
+                bt = upper_from_char(bt);
+            }
+            if (slash_insensitive)
+            {
+                at = correct_slash_from_char(at);
+                bt = correct_slash_from_char(bt);
+            }
+            if (at != bt)
+            {
+                result = 0;
+                break;
+            }
+        }
+    }
+    return result;
+}
+
+// =============================================================================
 // String Formatting & Copying
 
 internal String8 str8_copy(Arena* arena, String8 in)

Juliet/core/core_string.h

@@ -1,6 +1,6 @@
 #pragma once
 
-// ========================================================================== //
+// =============================================================================
 // String Types
 
 typedef struct String8 String8;
@@ -24,7 +24,18 @@ struct String32
     uint64  size;
 };
 
-// ========================================================================== //
+// =============================================================================
+// String Matching Types
+
+typedef uint32 StringMatchFlags;
+enum
+{
+    StringMatchFlag_CaseInsensitive  = (1 << 0),
+    StringMatchFlag_RightSideSloppy  = (1 << 1),
+    StringMatchFlag_SlashInsensitive = (1 << 2),
+};
+
+// =============================================================================
 // Unicode decoding Types
 
 typedef struct UnicodeDecode UnicodeDecode;
@@ -34,13 +45,24 @@ struct UnicodeDecode
     uint32 codepoint;
 };
 
-// ========================================================================== //
+// =============================================================================
+// String conversions
+
+internal bool32 char_is_upper(uint8 c);
+internal bool32 char_is_lower(uint8 c);
+internal bool32 char_is_slash(uint8 c);
+internal uint8  lower_from_char(uint8 c);
+internal uint8  upper_from_char(uint8 c);
+internal uint8  correct_slash_from_char(uint8 c);
+
+// =============================================================================
 // String Length
+
 internal uint64 cstring8_length(uint8* cstring);
 internal uint64 cstring16_length(uint16* cstring);
 internal uint64 cstring32_length(uint32* cstring);
 
-// ========================================================================== //
+// =============================================================================
 // String Constructor
 
 #define str8_literal(S) str8((uint8*)(S), sizeof(S) - 1)
@@ -55,13 +77,19 @@ internal String8  str8_cstring(const char* cstring);
 internal String16 str16_cstring(uint16* cstring);
 internal String32 str32_cstring(uint32* cstring);
 
-// ========================================================================== //
+// =============================================================================
+// String Matching
+
+internal bool32 str8_match(String8 a, String8 b, StringMatchFlags flags);
+#define str8_matchi(a, b) str8_match(a, b, StringMatchFlag_CaseInsensitive)
+
+// =============================================================================
 // String Formatting & Copying
 
 internal String8 str8_copy(Arena* arena, String8 in);
 internal String8 str8fv(Arena* arena, char* fmt, va_list args);
 
-// ========================================================================== //
+// =============================================================================
 // Unicode String Encode/Decode
 
 internal UnicodeDecode utf8_decode(uint8* str, uint64 max);
@@ -69,7 +97,7 @@ internal UnicodeDecode utf16_decode(uint16* str, uint64 max);
 internal uint32        utf8_encode(uint8* str, uint32 codepoint);
 internal uint32        utf16_encode(uint16* str, uint32 codepoint);
 
-// ========================================================================== //
+// =============================================================================
 // Unicode String Conversions
 
 internal String8  str8_from_16(Arena* arena, String16 in);

Juliet/core/core_threads.h

@@ -1,5 +1,14 @@
 #pragma once
 
+// =============================================================================
+// Synchronization primitives types
+
+typedef struct RWMutex RWMutex;
+struct RWMutex
+{
+    uint64 handle[1];
+};
+
 // =============================================================================
 //  Thread Info Helpers
 internal void set_thread_name(String8 name);
@@ -10,3 +19,21 @@ internal void set_thread_namef(char* fmt, ...);
 
 internal uint32 tid();
 internal void   set_platform_thread_name(String8 name);
+
+// =============================================================================
+// Synchronization primitive functions
+
+// Read Write Mutexes functions
+
+internal RWMutex rw_mutex_alloc();
+internal void    rw_mutex_release(RWMutex mutex);
+internal void    rw_mutex_take(RWMutex mutex, bool32 write_mode);
+internal void    rw_mutex_drop(RWMutex mutex, bool32 write_mode);
+#define rw_mutex_take_r(m) rw_mutex_take((m), (0))
+#define rw_mutex_take_w(m) rw_mutex_take((m), (1))
+#define rw_mutex_drop_r(m) rw_mutex_drop((m), (0))
+#define rw_mutex_drop_w(m) rw_mutex_drop((m), (1))
+
+// Scope macros
+#define MutexScopeR(mutex) DeferLoop(rw_mutex_take_r(mutex), rw_mutex_drop_r(mutex))
+#define MutexScopeW(mutex) DeferLoop(rw_mutex_take_w(mutex), rw_mutex_drop_w(mutex))

Juliet/julietapp/julietapp_core.c

@@ -5,35 +5,61 @@ internal void ja_init()
     ja_state->arena = arena;
 
     // Window cache
-    ja_state->window_state_gen_id = 1;
+    {
+        ja_state->window_request_gen_id    = 1;
+        ja_state->window_state_slots_count = 64;
+        ja_state->window_state_slots       = push_array(arena, JA_WindowStateSlot, ja_state->window_state_slots_count);
         ja_state->first_window_state = ja_state->last_window_state = &ja_nil_window_state;
     }
 
+    // Create window requests (2 for testing)
+    {
+        ja_window_request();
+    }
+}
+
 internal void ja_frame()
 {
     TempArena scratch = scratch_begin(0, 0);
+    ja_state->frame_depth += 1;
 
     // =========================================================================
     // Events from os
     WM_EventList events = { 0 };
+    if (ja_state->frame_depth == 1)
+    {
         bool32 wait = 0;
         events      = wm_get_events(scratch.arena, wait);
-
-    //     if (hello.handle[0] == 0)
-    //     {
-    //         hello = wm_window_open(rect2fp(50.f, 50.f, 1280.f, 720.f), WM_WindowFlag_UseDefaultPosition,
-    //         str8_literal("Hello")); wm_window_first_paint(hello);
-    //     }
+    }
 
     // =========================================================================
     // Consume events
     {
+        if (wm_key_press(&events, wm_window_zero(), 0, WM_Key_F1))
+        {
+            ja_window_request();
+        }
         for (WM_Event *event = events.first, *next = 0; event != 0; event = next)
         {
+            JA_WindowState* ws   = ja_window_state_from_platform_handle(event->window);
             bool32          take = 0;
             if (event->kind == WM_EventKind_WindowClose)
+            {
+                if (ws != 0)
+                {
+                    JA_WindowRequest* request = ja_window_request_from_id(ws->id);
+                    AssertAlways(request != 0);
+                    ja_window_close_request(request);
+
+                    if (ja_state->window_request_count == 0)
                     {
                         ja_state->quit = 1;
+                    }
+                }
+                else
+                {
+                    ja_state->quit = 1;
+                }
                 take = 1;
             }
 
@@ -46,20 +72,83 @@ internal void ja_frame()
 
     // Window management (open/render)
     {
-        for
-            EachIndex(slot_idx, ja_state->window_state_gen_id)
+        for EachNode(request, JA_WindowRequest, ja_state->window_request_first)
         {
-                JA_WindowState* ws = ja_window_state_from_id(slot_idx);
+            JA_WindowState* ws = ja_window_state_from_id(request->id);
+
+            // Will render here but for now just increase frame num
+            ws->frames_alive += 1;
         }
     }
 
+    // Window Garbage collect
+    {
+        for EachIndex(slot_idx, ja_state->window_state_slots_count)
+        {
+            for (JA_WindowState *ws = ja_state->window_state_slots[slot_idx].first, *next; ws != 0; ws = next)
+            {
+                next                      = ws->hash_next;
+                JA_WindowRequest* request = ja_window_request_from_id(ws->id);
+                if (request == 0 || ja_state->quit)
+                {
+                    r_window_unequip(ws->plat_handle, ws->render_handle);
+                    wm_window_close(ws->plat_handle);
+                    arena_release(ws->arena);
+                    DLL_remove_next_prev_zero(&ja_nil_window_state, ja_state->first_window_state,
+                                              ja_state->last_window_state, ws, order_next, order_previous);
+                    DLL_remove_next_prev(ja_state->window_state_slots[slot_idx].first,
+                                         ja_state->window_state_slots[slot_idx].last, ws, hash_next, hash_previous);
+                    SLL_stack_push_next(ja_state->free_window_state, ws, order_next);
+                }
+            }
+        }
+    }
+
+    // render frame
+    r_begin_frame();
+    for (JA_WindowState* w = ja_state->first_window_state; w != &ja_nil_window_state; w = w->order_next)
+    {
+        r_window_begin_frame(w->plat_handle, w->render_handle);
+        r_window_end_frame(w->plat_handle, w->render_handle);
+    }
+    r_end_frame();
+
+    // show window after first frame
+    if (ja_state->frame_depth == 1)
+    {
+        JA_IDList windows_to_show = { 0 };
+        for (JA_WindowState* ws = ja_state->first_window_state; ws != &ja_nil_window_state; ws = ws->order_next)
+        {
+            if (ws->frames_alive == 1)
+            {
+                ja_id_list_push(scratch.arena, &windows_to_show, ws->id);
+            }
+        }
+        for EachNode(node, JA_IDNode, windows_to_show.first)
+        {
+            JA_WindowState* ws = ja_window_state_from_id(node->val);
+            wm_window_first_paint(ws->plat_handle);
+        }
+    }
+
+    ja_state->frame_depth -= 1;
     scratch_end(scratch);
 }
 
 internal void ja_shutdown()
 {
-    // wm_window_close(aaa);
-    arena_clear(ja_state->arena);
+    arena_release(ja_state->arena);
+}
+
+// =============================================================================
+// Id Functions
+
+internal void ja_id_list_push(Arena* arena, JA_IDList* list, JA_ID id)
+{
+    JA_IDNode* node = push_array(arena, JA_IDNode, 1);
+    SLL_queue_push(list->first, list->last, node);
+    list->count += 1;
+    node->val = id;
 }
 
 // =============================================================================
@@ -76,9 +165,139 @@ internal JA_WindowState* ja_window_state_from_id(JA_ID id)
     else
     {
         uint64              hash     = uint64_hash_from_string(str8_struct(&id));
+        uint64              slot_idx = hash % ja_state->window_state_slots_count;
+        JA_WindowStateSlot* slot     = &ja_state->window_state_slots[slot_idx];
+        for (JA_WindowState* w = slot->first; w != 0; w = w->hash_next)
+        {
+            if (w->id == id)
+            {
+                ws = w;
+                break;
+            }
+        }
     }
 
     // allocate / open window if none found for this id
+    if (ws == &ja_nil_window_state)
+    {
+        ws = ja_state->free_window_state;
+        if (ws != 0)
+        {
+            SLL_stack_pop_next(ja_state->free_window_state, order_next);
+        }
+        else
+        {
+            ws = push_array_no_zero(ja_state->arena, JA_WindowState, 1);
+        }
+        MemoryZeroStruct(ws);
 
+        ws->id    = id;
+        ws->arena = arena_alloc();
+
+        // hook up the window
+        uint64              hash     = uint64_hash_from_string(str8_struct(&id));
+        uint64              slot_idx = hash % ja_state->window_state_slots_count;
+        JA_WindowStateSlot* slot     = &ja_state->window_state_slots[slot_idx];
+        DLL_push_back_next_prev_zero(&ja_nil_window_state, ja_state->first_window_state, ja_state->last_window_state,
+                                     ws, order_next, order_previous);
+        DLL_push_back_next_prev(slot->first, slot->last, ws, hash_next, hash_previous);
+    }
+
+    if (ws != &ja_nil_window_state && wm_window_match(ws->plat_handle, wm_window_zero()))
+    {
+        TempArena scratch = scratch_begin(0, 0);
+
+        ws->frames_alive = 0;
+
+        // TODO: save fav monitor in config
+        WM_Monitor prim_m    = wm_primary_monitor();
+        String8    prim_name = wm_name_from_monitor(scratch.arena, prim_m);
+
+        WM_Monitor fav_monitor = { 0 };
+        {
+            WM_MonitorArray monitors = wm_push_monitors_array(scratch.arena);
+            for EachIndex(idx, monitors.count)
+            {
+                String8 monitor_name = wm_name_from_monitor(scratch.arena, monitors.ptr[idx]);
+                if (str8_match(monitor_name, prim_name, StringMatchFlag_CaseInsensitive))
+                {
+                    fav_monitor = monitors.ptr[idx];
+                    break;
+                }
+            }
+        }
+
+        // TODO : put those in config, hardcoded for now
+        String8 title   = str8_literal("Juliet");
+        ws->plat_handle = wm_window_open(rect2fp(50.f, 240.f, 1280.f, 720.f), WM_WindowFlag_UseDefaultPosition, title);
+        ws->render_handle       = r_window_equip(ws->plat_handle);
+        WM_Monitor zero_monitor = { 0 };
+        if (!wm_monitor_match(zero_monitor, fav_monitor))
+        {
+            wm_window_set_monitor(ws->plat_handle, fav_monitor);
+        }
+
+        scratch_end(scratch);
+    }
+
+    ja_state->window_state_last_accessed_id = ws->id;
+    ja_state->window_state_last_accessed    = ws;
     return ws;
 }
+
+internal JA_WindowState* ja_window_state_from_platform_handle(WM_Window platform_handle)
+{
+    JA_WindowState* ws = &ja_nil_window_state;
+    {
+        for (JA_WindowState* w_candidate = ja_state->first_window_state; w_candidate != &ja_nil_window_state;
+             w_candidate                 = w_candidate->order_next)
+        {
+            if (wm_window_match(w_candidate->plat_handle, platform_handle))
+            {
+                ws = w_candidate;
+                break;
+            }
+        }
+    }
+    return ws;
+}
+
+internal void ja_window_request()
+{
+    JA_ID             id     = ja_state->window_request_gen_id++;
+    JA_WindowRequest* result = ja_state->free_window_request;
+    if (result != 0)
+    {
+        SLL_stack_pop(ja_state->free_window_request);
+    }
+    else
+    {
+        result = push_array_no_zero(ja_state->arena, JA_WindowRequest, 1);
+    }
+    result->id = id;
+    DLL_push_back(ja_state->window_request_first, ja_state->window_request_last, result);
+    ja_state->window_request_count += 1;
+}
+
+internal void ja_window_close_request(JA_WindowRequest* request)
+{
+    DLL_remove(ja_state->window_request_first, ja_state->window_request_last, request);
+    SLL_stack_push(ja_state->free_window_request, request);
+
+    ja_state->window_request_count -= 1;
+    AssertAlways(ja_state->window_request_count >= 0);
+}
+
+internal JA_WindowRequest* ja_window_request_from_id(JA_ID id)
+{
+    JA_WindowRequest* result = 0;
+    for EachNode(wr, JA_WindowRequest, ja_state->window_request_first)
+    {
+        if (wr->id == id)
+        {
+            result = wr;
+            break;
+        }
+    }
+    return result;
+}

Juliet/julietapp/julietapp_core.h

@@ -4,18 +4,54 @@
 // Core Types
 typedef uint64 JA_ID;
 
+typedef struct JA_IDNode JA_IDNode;
+struct JA_IDNode
+{
+    JA_IDNode* next;
+    JA_ID      val;
+};
+
+typedef struct JA_IDList JA_IDList;
+struct JA_IDList
+{
+    JA_IDNode* first;
+    JA_IDNode* last;
+    uint64     count;
+};
+
 // =============================================================================
 // States Types
 
+typedef struct JA_WindowRequest JA_WindowRequest;
+struct JA_WindowRequest
+{
+    JA_WindowRequest* next;
+    JA_WindowRequest* previous;
+    JA_ID             id;
+};
+
 typedef struct JA_WindowState JA_WindowState;
 struct JA_WindowState
 {
+    // links and metadata
     JA_WindowState* order_next;
     JA_WindowState* order_previous;
     JA_WindowState* hash_next;
     JA_WindowState* hash_previous;
     JA_ID           id;
+    uint64          frames_alive;
+
+    // Info and handle
+    Arena*    arena;
     WM_Window plat_handle;
+    R_Handle  render_handle;
+};
+
+typedef struct JA_WindowStateSlot JA_WindowStateSlot;
+struct JA_WindowStateSlot
+{
+    JA_WindowState* first;
+    JA_WindowState* last;
 };
 
 typedef struct JA_State JA_State;
@@ -24,13 +60,23 @@ struct JA_State
     // Base
     Arena* arena;
     bool32 quit;
+    int32  frame_depth;
+
+    // Windows requests
+    JA_ID             window_request_gen_id;
+    JA_WindowRequest* window_request_first;
+    JA_WindowRequest* window_request_last;
+    JA_WindowRequest* free_window_request;
+    uint64            window_request_count;
 
     // Windows
+    JA_WindowState*     free_window_state;
+    uint64              window_state_slots_count;
+    JA_WindowStateSlot* window_state_slots;
     JA_WindowState*     first_window_state;
     JA_WindowState*     last_window_state;
-    JA_WindowState* window_state_last_accessed;
     JA_ID               window_state_last_accessed_id;
-    JA_ID           window_state_gen_id;
+    JA_WindowState*     window_state_last_accessed;
 };
 
 // =============================================================================
@@ -47,7 +93,16 @@ internal void ja_init();
 internal void ja_frame();
 internal void ja_shutdown();
 
+// =============================================================================
+// Id Functions
+
+internal void ja_id_list_push(Arena* arena, JA_IDList* list, JA_ID id);
+
 // =============================================================================
 // Window Functions
 
 internal JA_WindowState*   ja_window_state_from_id(JA_ID id);
+internal JA_WindowState*   ja_window_state_from_platform_handle(WM_Window platform_handle);
+internal void              ja_window_request();
+internal void              ja_window_close_request(JA_WindowRequest* request);
+internal JA_WindowRequest* ja_window_request_from_id(JA_ID id);

Juliet/julietapp/julietapp_main.c

@@ -4,12 +4,14 @@
 
 // Headers
 #include "core/core_inc.h"
+#include "shell/shell_inc.h"
 #include "window_manager/window_manager_inc.h"
 #include "render/render_inc.h"
 #include "julietapp/julietapp_inc.h"
 
 // C
 #include "core/core_inc.c"
+#include "shell/shell_inc.c"
 #include "window_manager/window_manager_inc.c"
 #include "render/render_inc.c"
 #include "julietapp/julietapp_inc.c"
@@ -24,6 +26,7 @@ internal bool32 frame()
 internal void entry_point()
 {
     wm_init();
+    r_init();
     ja_init();
 
     for (bool32 quit = 0; !quit;)
@@ -31,4 +34,5 @@ internal void entry_point()
         quit = update();
     }
     ja_shutdown();
+    r_shutdown();
 }

Juliet/render/d3d12/render_d3d12.c

@@ -0,0 +1,392 @@
+// TODO : Adapt stuff from D3D12GraphicsDevice.c specially all the shenanigans with dxgi factory and stuff
+// TODO : Support more kind of format (HDR)
+
+// =============================================================================
+// Helpers
+
+internal R_D3D12_Window* r_d3d12_window_from_handle(R_Handle handle)
+{
+    R_D3D12_Window* window = (R_D3D12_Window*)handle.u64[0];
+    if (window == 0)
+    {
+        window = &r_d3d12_nil_window;
+    }
+    return window;
+}
+
+internal R_Handle r_d3d12_handle_from_window(R_D3D12_Window* window)
+{
+    R_Handle handle = { 0 };
+    handle.u64[0]   = (uint64)window;
+    return handle;
+}
+
+// =============================================================================
+// Wait Function
+
+internal void r_d3d12_wait()
+{
+    r_d3d12_state->fence_value += 1;
+    ID3D12CommandQueue_Signal(r_d3d12_state->direct_command_queue, r_d3d12_state->fence, r_d3d12_state->fence_value);
+    if (ID3D12Fence_GetCompletedValue(r_d3d12_state->fence) < r_d3d12_state->fence_value)
+    {
+        ID3D12Fence_SetEventOnCompletion(r_d3d12_state->fence, r_d3d12_state->fence_value, r_d3d12_state->fence_event);
+        WaitForSingleObject(r_d3d12_state->fence_event, INFINITE);
+    }
+}
+
+// =============================================================================
+// top level layer initialization
+
+void r_init()
+{
+    HRESULT error                  = 0;
+    Arena*  arena                  = arena_alloc();
+    r_d3d12_state                  = push_array(arena, R_D3D12_State, 1);
+    r_d3d12_state->arena           = arena;
+    r_d3d12_state->device_rw_mutex = rw_mutex_alloc();
+
+    // Create base device
+    D3D_FEATURE_LEVEL feature_level = D3D_FEATURE_LEVEL_12_1;
+
+    UINT dxgi_flags = 0;
+#if BUILD_DEBUG
+    ID3D12Debug1* debug_controller = 0;
+    if (SUCCEEDED(D3D12GetDebugInterface(&IID_ID3D12Debug1, (void**)&debug_controller)))
+    {
+        ID3D12Debug1_EnableDebugLayer(debug_controller);
+        ID3D12Debug1_SetEnableGPUBasedValidation(debug_controller, TRUE);
+        ID3D12Debug1_Release(debug_controller);
+    }
+    dxgi_flags |= DXGI_CREATE_FACTORY_DEBUG;
+#endif
+
+    error = CreateDXGIFactory2(dxgi_flags, &IID_IDXGIFactory4, (void**)&r_d3d12_state->dxgi_factory);
+    if (FAILED(error))
+    {
+        char buffer[256] = { 0 };
+        juliet_snprintf(buffer, sizeof(buffer), "D3D12 DXGI factory creation failure (%lx). Process is terminating", error);
+        sh_message(1, str8_literal("Fatal Error"), str8_cstring(buffer));
+        abort_self(1);
+    }
+
+    // dxgi setup (device and adapter)
+    IDXGIFactory6* factory6 = 0;
+    error = IDXGIFactory4_QueryInterface(r_d3d12_state->dxgi_factory, &IID_IDXGIFactory6, (void**)&factory6);
+    if (SUCCEEDED(error))
+    {
+        // Prioritize discrete GPU
+        error = IDXGIFactory6_EnumAdapterByGpuPreference(factory6, 0, DXGI_GPU_PREFERENCE_HIGH_PERFORMANCE,
+                                                         &IID_IDXGIAdapter1, (void**)&r_d3d12_state->dxgi_adapter);
+        IDXGIFactory6_Release(factory6);
+    }
+    else
+    {
+        // Pray device 0 is the discrete gpu
+        error = IDXGIFactory4_EnumAdapters1(r_d3d12_state->dxgi_factory, 0, &r_d3d12_state->dxgi_adapter);
+    }
+
+    error = D3D12CreateDevice((IUnknown*)r_d3d12_state->dxgi_adapter, feature_level, &IID_ID3D12Device4,
+                              (void**)&r_d3d12_state->device);
+
+    // Try warp as hardware is no available
+    if (FAILED(error))
+    {
+        IDXGIAdapter1_Release(r_d3d12_state->dxgi_adapter);
+        error = IDXGIFactory4_EnumWarpAdapter(r_d3d12_state->dxgi_factory, &IID_IDXGIAdapter, (void**)&r_d3d12_state->dxgi_adapter);
+        if (SUCCEEDED(error))
+        {
+            error = D3D12CreateDevice((IUnknown*)r_d3d12_state->dxgi_adapter, feature_level, &IID_ID3D12Device4,
+                                      (void**)&r_d3d12_state->device);
+        }
+    }
+
+    if (FAILED(error))
+    {
+        char buffer[256] = { 0 };
+        juliet_snprintf(buffer, sizeof(buffer), "D3D12 device factory creation failure (%lx). Process is terminating", error);
+        sh_message(1, str8_literal("Fatal Error"), str8_cstring(buffer));
+        abort_self(1);
+    }
+
+    // break on error
+#if BUILD_DEBUG
+    ID3D12InfoQueue* info = 0;
+    error                 = ID3D12Device4_QueryInterface(r_d3d12_state->device, &IID_ID3D12InfoQueue, (void**)&info);
+    if (SUCCEEDED(error))
+    {
+        error = ID3D12InfoQueue_SetBreakOnSeverity(info, D3D12_MESSAGE_SEVERITY_CORRUPTION, TRUE);
+        error = ID3D12InfoQueue_SetBreakOnSeverity(info, D3D12_MESSAGE_SEVERITY_ERROR, TRUE);
+        ID3D12InfoQueue_Release(info);
+    }
+#endif
+
+    // Create basic graphics queue
+    D3D12_COMMAND_QUEUE_DESC queue_desc = { 0 };
+    queue_desc.Type                     = D3D12_COMMAND_LIST_TYPE_DIRECT;
+    queue_desc.Flags                    = D3D12_COMMAND_QUEUE_FLAG_NONE;
+    error = ID3D12Device4_CreateCommandQueue(r_d3d12_state->device, &queue_desc, &IID_ID3D12CommandQueue,
+                                             (void**)&r_d3d12_state->direct_command_queue);
+    if (FAILED(error))
+    {
+        char buffer[256] = { 0 };
+        juliet_snprintf(buffer, sizeof(buffer), "D3D12 direct command queue creation failure (%lx). Process is terminating", error);
+        sh_message(1, str8_literal("Fatal Error"), str8_cstring(buffer));
+        abort_self(1);
+    }
+
+    // Create command allocator and command list
+    for EachIndex(i, 2)
+    {
+        ID3D12Device4_CreateCommandAllocator(r_d3d12_state->device, D3D12_COMMAND_LIST_TYPE_DIRECT,
+                                             &IID_ID3D12CommandAllocator, (void**)&r_d3d12_state->command_allocators[i]);
+    }
+
+    ID3D12Device4_CreateCommandList1(r_d3d12_state->device, 0, D3D12_COMMAND_LIST_TYPE_DIRECT, D3D12_COMMAND_LIST_FLAG_NONE,
+                                     &IID_ID3D12GraphicsCommandList, (void**)&r_d3d12_state->command_list);
+
+    ID3D12Device4_CreateFence(r_d3d12_state->device, 0, D3D12_FENCE_FLAG_NONE, &IID_ID3D12Fence, (void**)&r_d3d12_state->fence);
+    r_d3d12_state->fence_event = CreateEventW(0, FALSE, FALSE, 0);
+}
+
+void r_shutdown()
+{
+    MutexScopeW(r_d3d12_state->device_rw_mutex)
+    {
+        r_d3d12_wait();
+
+        CloseHandle(r_d3d12_state->fence_event);
+        ID3D12Fence_Release(r_d3d12_state->fence);
+        for EachIndex(i,2)
+        {
+            ID3D12CommandAllocator_Release(r_d3d12_state->command_allocators[i]);
+        }
+        ID3D12CommandList_Release(r_d3d12_state->command_list);
+        ID3D12CommandQueue_Release(r_d3d12_state->direct_command_queue);
+        ID3D12Device4_Release(r_d3d12_state->device);
+        IDXGIAdapter1_Release(r_d3d12_state->dxgi_adapter);
+        IDXGIFactory4_Release(r_d3d12_state->dxgi_factory);
+    }
+    rw_mutex_release(r_d3d12_state->device_rw_mutex);
+    arena_release(r_d3d12_state->arena);
+}
+
+// =============================================================================
+// window setup/teardown
+
+R_Handle r_window_equip(WM_Window handle)
+{
+    R_Handle result = { 0 };
+
+    MutexScopeW(r_d3d12_state->device_rw_mutex)
+    {
+        R_D3D12_Window* window = r_d3d12_state->first_free_window;
+        if (window != 0)
+        {
+            SLL_stack_pop(r_d3d12_state->first_free_window);
+            MemoryZeroStruct(window);
+        }
+        else
+        {
+            window = push_array(r_d3d12_state->arena, R_D3D12_Window, 1);
+        }
+
+        HWND hwnd = { 0 };
+        {
+            W32_WM_Window* w32_layer_window = w32_wm_window_from_handle(handle);
+            hwnd                            = w32_wm_hwnd_from_window(w32_layer_window);
+        }
+
+        // Create swapchain
+        DXGI_SWAP_CHAIN_DESC1 swapchain_desc = { 0 };
+        swapchain_desc.Width                 = 0; // Use all window width
+        swapchain_desc.Height                = 0; // Use all window height
+        swapchain_desc.Format                = DXGI_FORMAT_B8G8R8A8_UNORM;
+        swapchain_desc.Stereo                = 0;
+        swapchain_desc.SampleDesc.Count      = 1;
+        swapchain_desc.SampleDesc.Quality    = 0;
+        swapchain_desc.BufferUsage           = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+        swapchain_desc.BufferCount           = 2; // Double buffering
+        swapchain_desc.Scaling               = DXGI_SCALING_NONE;
+        swapchain_desc.SwapEffect            = DXGI_SWAP_EFFECT_FLIP_DISCARD;
+        swapchain_desc.AlphaMode             = DXGI_ALPHA_MODE_UNSPECIFIED;
+        swapchain_desc.Flags                 = 0;
+
+        DXGI_SWAP_CHAIN_FULLSCREEN_DESC swapchain_fullscreen_desc = { 0 };
+        swapchain_fullscreen_desc.RefreshRate.Numerator           = 0;
+        swapchain_fullscreen_desc.RefreshRate.Denominator         = 0;
+        swapchain_fullscreen_desc.ScanlineOrdering                = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
+        swapchain_fullscreen_desc.Scaling                         = DXGI_MODE_SCALING_UNSPECIFIED;
+        swapchain_fullscreen_desc.Windowed                        = TRUE;
+
+        IDXGISwapChain1* swapchain1 = 0;
+        HRESULT          error      = IDXGIFactory4_CreateSwapChainForHwnd(r_d3d12_state->dxgi_factory,
+                                                                           (IUnknown*)r_d3d12_state->direct_command_queue, hwnd,
+                                                                           &swapchain_desc, &swapchain_fullscreen_desc, 0, &swapchain1);
+        if (FAILED(error))
+        {
+            char buffer[256];
+            juliet_snprintf(buffer, sizeof(buffer), "DXGI swap chain creation failure (%lx). Process is terminating.", error);
+            sh_message(1, str8_literal("Fatal Error"), str8_cstring(buffer));
+            abort_self(1);
+        }
+
+        IDXGISwapChain1_QueryInterface(swapchain1, &IID_IDXGISwapChain3, (void**)&window->swapchain);
+        IDXGISwapChain1_Release(swapchain1);
+
+        IDXGIFactory4_MakeWindowAssociation(r_d3d12_state->dxgi_factory, hwnd, DXGI_MWA_NO_ALT_ENTER);
+
+        // Create framebuffer and rtv for swapchain
+        D3D12_DESCRIPTOR_HEAP_DESC rtv_heap_desc = { 0 };
+        rtv_heap_desc.Type                       = D3D12_DESCRIPTOR_HEAP_TYPE_RTV;
+        rtv_heap_desc.NumDescriptors             = 2;
+        rtv_heap_desc.Flags                      = D3D12_DESCRIPTOR_HEAP_FLAG_NONE;
+
+        ID3D12Device4_CreateDescriptorHeap(r_d3d12_state->device, &rtv_heap_desc, &IID_ID3D12DescriptorHeap,
+                                           (void**)&window->rtv_heap);
+
+        UINT rtv_stride = ID3D12Device4_GetDescriptorHandleIncrementSize(r_d3d12_state->device, D3D12_DESCRIPTOR_HEAP_TYPE_RTV);
+
+        D3D12_CPU_DESCRIPTOR_HANDLE rtv_handle = { 0 };
+        ID3D12DescriptorHeap_GetCPUDescriptorHandleForHeapStart(window->rtv_heap, &rtv_handle);
+
+        for (UINT i = 0; i < 2; ++i)
+        {
+            window->rtv_handles[i] = rtv_handle;
+            IDXGISwapChain3_GetBuffer(window->swapchain, i, &IID_ID3D12Resource, (void**)&window->framebuffer[i]);
+            ID3D12Device4_CreateRenderTargetView(r_d3d12_state->device, window->framebuffer[i], 0, window->rtv_handles[i]);
+            rtv_handle.ptr += rtv_stride;
+        }
+
+        // Save resolution in case of resize
+        Rect2f   client_rect = wm_client_rect_from_window(handle);
+        Vector2i resolution  = { (int32)(client_rect.x1 - client_rect.x0), (int32)(client_rect.y1 - client_rect.y0) };
+        window->last_resolution = resolution;
+
+        result = r_d3d12_handle_from_window(window);
+    }
+    return result;
+}
+
+void r_window_unequip(WM_Window handle, R_Handle handle_equip)
+{
+    MutexScopeW(r_d3d12_state->device_rw_mutex)
+    {
+        r_d3d12_wait();
+
+        R_D3D12_Window* window = r_d3d12_window_from_handle(handle_equip);
+        if (window != 0 && window != &r_d3d12_nil_window)
+        {
+            for EachIndex(i, 2)
+            {
+                ID3D12Resource_Release(window->framebuffer[i]);
+            }
+            ID3D12DescriptorHeap_Release(window->rtv_heap);
+            IDXGISwapChain1_Release(window->swapchain);
+            SLL_stack_push(r_d3d12_state->first_free_window, window);
+        }
+    }
+}
+
+// frame markers
+
+void r_begin_frame()
+{
+    // No-op
+}
+
+void r_end_frame()
+{
+    // pouet
+}
+
+void r_window_begin_frame(WM_Window window, R_Handle window_equip)
+{
+    MutexScopeW(r_d3d12_state->device_rw_mutex)
+    {
+        R_D3D12_Window* r_window = r_d3d12_window_from_handle(window_equip);
+
+        // Get resolution
+        Rect2f   client_rect = wm_client_rect_from_window(window);
+        Vector2i resolution  = { (int32)(client_rect.x1 - client_rect.x0), (int32)(client_rect.y1 - client_rect.y0) };
+
+        // change resolution
+        if (resolution.x > 0 && resolution.y > 0 &&
+            (r_window->last_resolution.x != resolution.x || r_window->last_resolution.y != resolution.y))
+        {
+            r_window->last_resolution = resolution;
+
+            // resize swap chain
+            r_d3d12_wait();
+
+            for EachIndex(i,2)
+            {
+                if (r_window->framebuffer[i] != 0)
+                {
+                    ID3D12Resource_Release(r_window->framebuffer[i]);
+                    r_window->framebuffer[i] = 0;
+                }
+            }
+
+            IDXGISwapChain3_ResizeBuffers(r_window->swapchain, 0, 0, 0, DXGI_FORMAT_UNKNOWN, 0);
+
+            for EachIndex(i,2)
+            {
+                IDXGISwapChain3_GetBuffer(r_window->swapchain, i, &IID_ID3D12Resource, (void**)&r_window->framebuffer[i]);
+                ID3D12Device4_CreateRenderTargetView(r_d3d12_state->device, r_window->framebuffer[i], 0, r_window->rtv_handles[i]);
+            }
+        }
+
+        // Open the command list for that window that frame
+        // TODO : multiple command list as we have multiple windows
+        r_window->framebuffer_idx            = IDXGISwapChain3_GetCurrentBackBufferIndex(r_window->swapchain);
+        ID3D12CommandAllocator*    allocator = r_d3d12_state->command_allocators[r_window->framebuffer_idx];
+        ID3D12GraphicsCommandList* cmd_list  = r_d3d12_state->command_list;
+
+        ID3D12CommandAllocator_Reset(allocator);
+        ID3D12GraphicsCommandList1_Reset(cmd_list, allocator, 0);
+
+        // Barrier to transition from Present (end of frame) to render target
+        D3D12_RESOURCE_BARRIER barrier = { 0 };
+        barrier.Type                   = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
+        barrier.Transition.pResource   = r_window->framebuffer[r_window->framebuffer_idx];
+        barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
+        barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_PRESENT;
+        barrier.Transition.StateAfter  = D3D12_RESOURCE_STATE_RENDER_TARGET;
+        ID3D12GraphicsCommandList_ResourceBarrier(cmd_list, 1, &barrier);
+
+        // HARDCODED
+        // BLUE
+        float32 background[4] = { 0.1f, 0.2f, 0.8f, 1.0f };
+        ID3D12GraphicsCommandList_ClearRenderTargetView(cmd_list, r_window->rtv_handles[r_window->framebuffer_idx],
+                                                        background, 0, 0);
+    }
+}
+
+void r_window_end_frame(WM_Window window, R_Handle window_equip)
+{
+    MutexScopeW(r_d3d12_state->device_rw_mutex)
+    {
+        R_D3D12_Window* r_window = r_d3d12_window_from_handle(window_equip);
+
+        ID3D12GraphicsCommandList* cmd_list = r_d3d12_state->command_list;
+
+        // Transition from render target to present
+        D3D12_RESOURCE_BARRIER barrier = { 0 };
+        barrier.Type                   = D3D12_RESOURCE_BARRIER_TYPE_TRANSITION;
+        barrier.Transition.pResource   = r_window->framebuffer[r_window->framebuffer_idx];
+        barrier.Transition.Subresource = D3D12_RESOURCE_BARRIER_ALL_SUBRESOURCES;
+        barrier.Transition.StateBefore = D3D12_RESOURCE_STATE_RENDER_TARGET;
+        barrier.Transition.StateAfter  = D3D12_RESOURCE_STATE_PRESENT;
+        ID3D12GraphicsCommandList_ResourceBarrier(cmd_list, 1, &barrier);
+
+        // Close command list and push it onto the command queue
+        ID3D12GraphicsCommandList_Close(cmd_list);
+        ID3D12CommandQueue_ExecuteCommandLists(r_d3d12_state->direct_command_queue, 1, (ID3D12CommandList**)&cmd_list);
+
+        IDXGISwapChain3_Present(r_window->swapchain, 1, 0);
+
+        // Fence until gpu finishes work
+        r_d3d12_wait();
+    }
+}

Juliet/render/d3d12/render_d3d12.h

@@ -1 +1,72 @@
 #pragma once
+
+#define COBJMACROS
+#define CINTERFACE
+#include <d3d12.h>
+#include <dxgi1_6.h>
+#undef COBJMACROS
+#undef CINTERFACE
+
+#pragma comment(lib, "d3d12")
+#pragma comment(lib, "dxgi")
+#pragma comment(lib, "dxguid")
+
+// =============================================================================
+// D3D12 States Types
+
+typedef struct R_D3D12_Window R_D3D12_Window;
+struct R_D3D12_Window
+{
+    R_D3D12_Window* next;
+
+    // SwapChain and framebuffer
+    IDXGISwapChain3*            swapchain;
+    ID3D12Resource*             framebuffer[2];
+    D3D12_CPU_DESCRIPTOR_HANDLE rtv_handles[2];
+    ID3D12DescriptorHeap*       rtv_heap;
+    uint8                       framebuffer_idx;
+
+    // last state
+    Vector2i last_resolution;
+};
+
+typedef struct R_D3D12_State R_D3D12_State;
+struct R_D3D12_State
+{
+    // states
+    Arena*          arena;
+    R_D3D12_Window* first_free_window;
+    RWMutex         device_rw_mutex;
+
+    // base d3d12 object
+    ID3D12Device4* device;
+    IDXGIFactory4* dxgi_factory;
+    IDXGIAdapter1* dxgi_adapter;
+
+    // Commands
+    ID3D12CommandQueue*        direct_command_queue;
+    ID3D12CommandAllocator*    command_allocators[2];
+    ID3D12GraphicsCommandList* command_list;
+
+    // Fence
+    ID3D12Fence* fence;
+    uint64       fence_value;
+    HANDLE       fence_event;
+};
+
+// =============================================================================
+// Globals
+
+global R_D3D12_State*           r_d3d12_state      = 0;
+global read_only R_D3D12_Window r_d3d12_nil_window = { &r_d3d12_nil_window };
+
+// =============================================================================
+// Helpers
+
+internal R_D3D12_Window* r_d3d12_window_from_handle(R_Handle handle);
+internal R_Handle        r_d3d12_handle_from_window(R_D3D12_Window* window);
+
+// =============================================================================
+// Wait Function
+
+internal void r_d3d12_wait();

Juliet/render/render.h

@@ -1 +1,30 @@
 #pragma once
+
+// =============================================================================
+// Handle type
+
+typedef union R_Handle R_Handle;
+union R_Handle
+{
+    uint64 u64[1];
+    uint32 u32[2];
+    uint16 u16[4];
+};
+
+// =============================================================================
+// top level layer initialization
+void r_init();
+void r_shutdown();
+
+// =============================================================================
+// window setup/teardown
+
+R_Handle r_window_equip(WM_Window window);
+void     r_window_unequip(WM_Window window, R_Handle window_equip);
+
+// frame markers
+
+void r_begin_frame();
+void r_end_frame();
+void r_window_begin_frame(WM_Window window, R_Handle window_equip);
+void r_window_end_frame(WM_Window window, R_Handle window_equip);

Juliet/shell/shell.h

@@ -0,0 +1,6 @@
+#pragma once
+
+// =============================================================================
+// Shell operations
+
+internal void sh_message(bool32 error, String8 title, String8 message);

Juliet/shell/shell_inc.c

@@ -0,0 +1,7 @@
+#include "shell.c"
+
+#if OS_WINDOWS
+# include "win32/shell/win32_shell.c"
+#else
+# error Shell functions not implemented for this operating system
+#endif

Juliet/shell/shell_inc.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "shell.h"
+
+#if OS_WINDOWS
+# include "win32/shell/win32_shell.h"
+#else
+# error Shell functions not implemented for this operating system
+#endif

Juliet/win32/core/win32_core.c

@@ -6,6 +6,38 @@ typedef HRESULT W32_SetThreadDescription_Type(HANDLE hThread, PCWSTR lpThreadDes
 W32_KERNEL32_EXT_X_LIST
 #undef X
 
+// =============================================================================
+// Entity Functions
+
+internal W32_Entity* w32_entity_alloc(W32_EntityKind kind)
+{
+    W32_Entity* result = 0;
+    EnterCriticalSection(&w32_state.entity_mutex);
+    {
+        result = w32_state.entity_free;
+        if (result)
+        {
+            SLL_stack_pop(w32_state.entity_free);
+        }
+        else
+        {
+            result = push_array_no_zero(w32_state.entity_arena, W32_Entity, 1);
+        }
+        MemoryZeroStruct(result);
+    }
+    LeaveCriticalSection(&w32_state.entity_mutex);
+    result->kind = kind;
+    return result;
+}
+
+internal void w32_entity_release(W32_Entity* entity)
+{
+    entity->kind = W32_EntityKind_Null;
+    EnterCriticalSection(&w32_state.entity_mutex);
+    SLL_stack_push(w32_state.entity_free, entity);
+    LeaveCriticalSection(&w32_state.entity_mutex);
+}
+
 // =============================================================================
 // Time functions
 
@@ -85,6 +117,51 @@ internal void set_platform_thread_name(String8 name)
     scratch_end(scratch);
 }
 
+// =============================================================================
+// Synchronization primitive functions
+
+// read write mutexes
+
+internal RWMutex rw_mutex_alloc()
+{
+    W32_Entity* entity = w32_entity_alloc(W32_EntityKind_RWMutex);
+    InitializeSRWLock(&entity->rw_mutex);
+    RWMutex result = { IntFromPtr(entity) };
+    return result;
+}
+
+internal void rw_mutex_release(RWMutex rw_mutex)
+{
+    W32_Entity* entity = (W32_Entity*)PtrFromInt(rw_mutex.handle[0]);
+    w32_entity_release(entity);
+}
+
+internal void rw_mutex_take(RWMutex rw_mutex, bool32 write_mode)
+{
+    W32_Entity* entity = (W32_Entity*)PtrFromInt(rw_mutex.handle[0]);
+    if (write_mode)
+    {
+        AcquireSRWLockExclusive(&entity->rw_mutex);
+    }
+    else
+    {
+        AcquireSRWLockShared(&entity->rw_mutex);
+    }
+}
+
+internal void rw_mutex_drop(RWMutex rw_mutex, bool32 write_mode)
+{
+    W32_Entity* entity = (W32_Entity*)PtrFromInt(rw_mutex.handle[0]);
+    if (write_mode)
+    {
+        ReleaseSRWLockExclusive(&entity->rw_mutex);
+    }
+    else
+    {
+        ReleaseSRWLockShared(&entity->rw_mutex);
+    }
+}
+
 // =============================================================================
 // Memory
 
@@ -193,6 +270,10 @@ internal void w32_entry_point(int argc, WCHAR** wargv)
         }
     }
 
+    // setup entity storage
+    InitializeCriticalSection(&w32_state.entity_mutex);
+    w32_state.entity_arena = arena_alloc();
+
     main_thread_core_entry_point(argc, argv);
 
     tctx_release(tctx);

Juliet/win32/core/win32_core.h

@@ -7,13 +7,51 @@
 #pragma comment(lib, "shell32")
 // clang-format on
 
+// =============================================================================
+// Entity Types
+
+typedef enum W32_EntityKind
+{
+    W32_EntityKind_Null,
+    W32_EntityKind_RWMutex,
+} W32_EntityKind;
+
+typedef struct W32_Entity W32_Entity;
+struct W32_Entity
+{
+    W32_Entity*    next;
+    W32_EntityKind kind;
+    union
+    {
+        SRWLOCK rw_mutex;
+    };
+};
+
+// =============================================================================
+// W32 state types
+
 typedef struct W32_State W32_State;
 struct W32_State
 {
     Arena* arena;
-    SystemInfo system_info;
 
+    // info
+    SystemInfo system_info;
     uint64     microsecond_resolution;
+
+    // entities
+    CRITICAL_SECTION entity_mutex;
+    Arena*           entity_arena;
+    W32_Entity*      entity_free;
 };
 
+// =============================================================================
+// W32 globals
+
 global W32_State w32_state = { 0 };
+
+// =============================================================================
+// Entity Functions
+
+internal W32_Entity* w32_entity_alloc(W32_EntityKind kind);
+internal void        w32_entity_release(W32_Entity* entity);

Juliet/win32/shell/win32_shell.c

@@ -0,0 +1,11 @@
+// =============================================================================
+// Shell operations
+
+internal void sh_message(bool32 error, String8 title, String8 message)
+{
+    TempArena scratch   = scratch_begin(0, 0);
+    String16  title16   = str16_from_8(scratch.arena, title);
+    String16  message16 = str16_from_8(scratch.arena, message);
+    MessageBoxW(0, (WCHAR*)message16.str, (WCHAR*)title16.str, MB_OK | (!!error * MB_ICONERROR));
+    scratch_end(scratch);
+}

Juliet/win32/shell/win32_shell.h

@@ -0,0 +1 @@
+#pragma once

Juliet/win32/window_manager/window_manager.c

@@ -93,12 +93,237 @@ internal void w32_wm_window_release(W32_WM_Window* window)
 
 internal WM_Event* w32_wm_push_event(WM_EventKind kind, W32_WM_Window* window)
 {
-    WM_Event* result  = 0;
+    WM_Event* result  = wm_event_list_push_new(w32_wm_event_arena, &w32_wm_event_list, kind);
     result->window    = w32_wm_handle_from_window(window);
     result->modifiers = wm_get_modifiers();
     return result;
 }
 
+internal WM_Key w32_wm_os_key_from_vkey(WPARAM vKey)
+{
+    local_persist bool32 first = 1;
+    local_persist WM_Key key_table[256];
+    if (first)
+    {
+        first = 0;
+        MemoryZeroArray(key_table);
+
+        key_table[(unsigned int)'A'] = WM_Key_A;
+        key_table[(unsigned int)'B'] = WM_Key_B;
+        key_table[(unsigned int)'C'] = WM_Key_C;
+        key_table[(unsigned int)'D'] = WM_Key_D;
+        key_table[(unsigned int)'E'] = WM_Key_E;
+        key_table[(unsigned int)'F'] = WM_Key_F;
+        key_table[(unsigned int)'G'] = WM_Key_G;
+        key_table[(unsigned int)'H'] = WM_Key_H;
+        key_table[(unsigned int)'I'] = WM_Key_I;
+        key_table[(unsigned int)'J'] = WM_Key_J;
+        key_table[(unsigned int)'K'] = WM_Key_K;
+        key_table[(unsigned int)'L'] = WM_Key_L;
+        key_table[(unsigned int)'M'] = WM_Key_M;
+        key_table[(unsigned int)'N'] = WM_Key_N;
+        key_table[(unsigned int)'O'] = WM_Key_O;
+        key_table[(unsigned int)'P'] = WM_Key_P;
+        key_table[(unsigned int)'Q'] = WM_Key_Q;
+        key_table[(unsigned int)'R'] = WM_Key_R;
+        key_table[(unsigned int)'S'] = WM_Key_S;
+        key_table[(unsigned int)'T'] = WM_Key_T;
+        key_table[(unsigned int)'U'] = WM_Key_U;
+        key_table[(unsigned int)'V'] = WM_Key_V;
+        key_table[(unsigned int)'W'] = WM_Key_W;
+        key_table[(unsigned int)'X'] = WM_Key_X;
+        key_table[(unsigned int)'Y'] = WM_Key_Y;
+        key_table[(unsigned int)'Z'] = WM_Key_Z;
+
+        for (uint64 i = '0', j = WM_Key_0; i <= '9'; ++i, ++j)
+        {
+            key_table[i] = (WM_Key)j;
+        }
+        for (uint64 i = VK_NUMPAD0, j = WM_Key_0; i <= VK_NUMPAD9; ++i, ++j)
+        {
+            key_table[i] = (WM_Key)j;
+        }
+        for (uint64 i = VK_F1, j = WM_Key_F1; i <= VK_F24; ++i, ++j)
+        {
+            key_table[i] = (WM_Key)j;
+        }
+
+        key_table[VK_SPACE]      = WM_Key_Space;
+        key_table[VK_OEM_3]      = WM_Key_Tick;
+        key_table[VK_OEM_MINUS]  = WM_Key_Minus;
+        key_table[VK_OEM_PLUS]   = WM_Key_Equal;
+        key_table[VK_OEM_4]      = WM_Key_LeftBracket;
+        key_table[VK_OEM_6]      = WM_Key_RightBracket;
+        key_table[VK_OEM_1]      = WM_Key_Semicolon;
+        key_table[VK_OEM_7]      = WM_Key_Quote;
+        key_table[VK_OEM_COMMA]  = WM_Key_Comma;
+        key_table[VK_OEM_PERIOD] = WM_Key_Period;
+        key_table[VK_OEM_2]      = WM_Key_Slash;
+        key_table[VK_OEM_5]      = WM_Key_BackSlash;
+
+        key_table[VK_TAB]    = WM_Key_Tab;
+        key_table[VK_PAUSE]  = WM_Key_Pause;
+        key_table[VK_ESCAPE] = WM_Key_Esc;
+
+        key_table[VK_UP]    = WM_Key_Up;
+        key_table[VK_LEFT]  = WM_Key_Left;
+        key_table[VK_DOWN]  = WM_Key_Down;
+        key_table[VK_RIGHT] = WM_Key_Right;
+
+        key_table[VK_BACK]   = WM_Key_Backspace;
+        key_table[VK_RETURN] = WM_Key_Return;
+
+        key_table[VK_DELETE] = WM_Key_Delete;
+        key_table[VK_INSERT] = WM_Key_Insert;
+        key_table[VK_PRIOR]  = WM_Key_PageUp;
+        key_table[VK_NEXT]   = WM_Key_PageDown;
+        key_table[VK_HOME]   = WM_Key_Home;
+        key_table[VK_END]    = WM_Key_End;
+
+        key_table[VK_CAPITAL] = WM_Key_CapsLock;
+        key_table[VK_NUMLOCK] = WM_Key_NumLock;
+        key_table[VK_SCROLL]  = WM_Key_ScrollLock;
+        key_table[VK_APPS]    = WM_Key_Menu;
+
+        key_table[VK_CONTROL]  = WM_Key_Ctrl;
+        key_table[VK_LCONTROL] = WM_Key_Ctrl;
+        key_table[VK_RCONTROL] = WM_Key_Ctrl;
+        key_table[VK_SHIFT]    = WM_Key_Shift;
+        key_table[VK_LSHIFT]   = WM_Key_Shift;
+        key_table[VK_RSHIFT]   = WM_Key_Shift;
+        key_table[VK_MENU]     = WM_Key_Alt;
+        key_table[VK_LMENU]    = WM_Key_Alt;
+        key_table[VK_RMENU]    = WM_Key_Alt;
+
+        key_table[VK_DIVIDE]   = WM_Key_NumSlash;
+        key_table[VK_MULTIPLY] = WM_Key_NumStar;
+        key_table[VK_SUBTRACT] = WM_Key_NumMinus;
+        key_table[VK_ADD]      = WM_Key_NumPlus;
+        key_table[VK_DECIMAL]  = WM_Key_NumPeriod;
+
+        for (uint32 i = 0; i < 10; i += 1)
+        {
+            key_table[VK_NUMPAD0 + i] = (WM_Key)((uint64)WM_Key_Num0 + i);
+        }
+
+        for (uint64 i = 0xDF, j = 0; i < 0xFF; i += 1, j += 1)
+        {
+            key_table[i] = (WM_Key)((uint64)WM_Key_Ex0 + j);
+        }
+    }
+
+    WM_Key key = key_table[vKey & bitmask8];
+    return key;
+}
+
+internal WPARAM w32_wm_vkey_from_os_key(WM_Key key)
+{
+    WPARAM result = 0;
+    {
+        local_persist bool32 initialized              = 0;
+        local_persist WPARAM vkey_table[WM_Key_COUNT] = { 0 };
+        if (initialized == 0)
+        {
+            initialized            = 1;
+            vkey_table[WM_Key_Esc] = VK_ESCAPE;
+            for (WM_Key key = WM_Key_F1; key <= WM_Key_F24; key = (WM_Key)(key + 1))
+            {
+                vkey_table[key] = VK_F1 + (key - WM_Key_F1);
+            }
+            vkey_table[WM_Key_Tick] = VK_OEM_3;
+            for (WM_Key key = WM_Key_0; key <= WM_Key_9; key = (WM_Key)(key + 1))
+            {
+                vkey_table[key] = '0' + (key - WM_Key_0);
+            }
+            vkey_table[WM_Key_Minus]        = VK_OEM_MINUS;
+            vkey_table[WM_Key_Equal]        = VK_OEM_PLUS;
+            vkey_table[WM_Key_Backspace]    = VK_BACK;
+            vkey_table[WM_Key_Tab]          = VK_TAB;
+            vkey_table[WM_Key_Q]            = 'Q';
+            vkey_table[WM_Key_W]            = 'W';
+            vkey_table[WM_Key_E]            = 'E';
+            vkey_table[WM_Key_R]            = 'R';
+            vkey_table[WM_Key_T]            = 'T';
+            vkey_table[WM_Key_Y]            = 'Y';
+            vkey_table[WM_Key_U]            = 'U';
+            vkey_table[WM_Key_I]            = 'I';
+            vkey_table[WM_Key_O]            = 'O';
+            vkey_table[WM_Key_P]            = 'P';
+            vkey_table[WM_Key_LeftBracket]  = VK_OEM_4;
+            vkey_table[WM_Key_RightBracket] = VK_OEM_6;
+            vkey_table[WM_Key_BackSlash]    = VK_OEM_5;
+            vkey_table[WM_Key_CapsLock]     = VK_CAPITAL;
+            vkey_table[WM_Key_A]            = 'A';
+            vkey_table[WM_Key_S]            = 'S';
+            vkey_table[WM_Key_D]            = 'D';
+            vkey_table[WM_Key_F]            = 'F';
+            vkey_table[WM_Key_G]            = 'G';
+            vkey_table[WM_Key_H]            = 'H';
+            vkey_table[WM_Key_J]            = 'J';
+            vkey_table[WM_Key_K]            = 'K';
+            vkey_table[WM_Key_L]            = 'L';
+            vkey_table[WM_Key_Semicolon]    = VK_OEM_1;
+            vkey_table[WM_Key_Quote]        = VK_OEM_7;
+            vkey_table[WM_Key_Return]       = VK_RETURN;
+            vkey_table[WM_Key_Shift]        = VK_SHIFT;
+            vkey_table[WM_Key_Z]            = 'Z';
+            vkey_table[WM_Key_X]            = 'X';
+            vkey_table[WM_Key_C]            = 'C';
+            vkey_table[WM_Key_V]            = 'V';
+            vkey_table[WM_Key_B]            = 'B';
+            vkey_table[WM_Key_N]            = 'N';
+            vkey_table[WM_Key_M]            = 'M';
+            vkey_table[WM_Key_Comma]        = VK_OEM_COMMA;
+            vkey_table[WM_Key_Period]       = VK_OEM_PERIOD;
+            vkey_table[WM_Key_Slash]        = VK_OEM_2;
+            vkey_table[WM_Key_Ctrl]         = VK_CONTROL;
+            vkey_table[WM_Key_Alt]          = VK_MENU;
+            vkey_table[WM_Key_Space]        = VK_SPACE;
+            vkey_table[WM_Key_Menu]         = VK_APPS;
+            vkey_table[WM_Key_ScrollLock]   = VK_SCROLL;
+            vkey_table[WM_Key_Pause]        = VK_PAUSE;
+            vkey_table[WM_Key_Insert]       = VK_INSERT;
+            vkey_table[WM_Key_Home]         = VK_HOME;
+            vkey_table[WM_Key_PageUp]       = VK_PRIOR;
+            vkey_table[WM_Key_Delete]       = VK_DELETE;
+            vkey_table[WM_Key_End]          = VK_END;
+            vkey_table[WM_Key_PageDown]     = VK_NEXT;
+            vkey_table[WM_Key_Up]           = VK_UP;
+            vkey_table[WM_Key_Left]         = VK_LEFT;
+            vkey_table[WM_Key_Down]         = VK_DOWN;
+            vkey_table[WM_Key_Right]        = VK_RIGHT;
+            for (WM_Key key = WM_Key_Ex0; key <= WM_Key_Ex29; key = (WM_Key)(key + 1))
+            {
+                vkey_table[key] = 0xDF + (key - WM_Key_Ex0);
+            }
+            vkey_table[WM_Key_NumLock]           = VK_NUMLOCK;
+            vkey_table[WM_Key_NumSlash]          = VK_DIVIDE;
+            vkey_table[WM_Key_NumStar]           = VK_MULTIPLY;
+            vkey_table[WM_Key_NumMinus]          = VK_SUBTRACT;
+            vkey_table[WM_Key_NumPlus]           = VK_ADD;
+            vkey_table[WM_Key_NumPeriod]         = VK_DECIMAL;
+            vkey_table[WM_Key_Num0]              = VK_NUMPAD0;
+            vkey_table[WM_Key_Num1]              = VK_NUMPAD1;
+            vkey_table[WM_Key_Num2]              = VK_NUMPAD2;
+            vkey_table[WM_Key_Num3]              = VK_NUMPAD3;
+            vkey_table[WM_Key_Num4]              = VK_NUMPAD4;
+            vkey_table[WM_Key_Num5]              = VK_NUMPAD5;
+            vkey_table[WM_Key_Num6]              = VK_NUMPAD6;
+            vkey_table[WM_Key_Num7]              = VK_NUMPAD7;
+            vkey_table[WM_Key_Num8]              = VK_NUMPAD8;
+            vkey_table[WM_Key_Num9]              = VK_NUMPAD9;
+            vkey_table[WM_Key_LeftMouseButton]   = VK_LBUTTON;
+            vkey_table[WM_Key_MiddleMouseButton] = VK_MBUTTON;
+            vkey_table[WM_Key_RightMouseButton]  = VK_RBUTTON;
+        }
+        result = vkey_table[key];
+    }
+    return result;
+}
+
+// =============================================================================
+// w32 windows proc
+
 internal LRESULT w32_wm_wnd_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
 {
     LRESULT result = 0;
@@ -152,6 +377,91 @@ internal LRESULT w32_wm_wnd_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lPa
                 break;
             }
 
+        case WM_SYSKEYDOWN:
+        case WM_SYSKEYUP:
+            {
+                if (wParam != VK_MENU && (wParam < VK_F1 || VK_F24 < wParam || wParam < VK_F4))
+                {
+                    result = DefWindowProcW(hwnd, uMsg, wParam, lParam);
+                }
+            } // fallthrough;
+        case WM_KEYDOWN:
+        case WM_KEYUP:
+            {
+                bool32 was_down = (lParam & bit31);
+                bool32 is_down  = !(lParam & bit32);
+
+                bool32 is_repeat = 0;
+                if (!is_down)
+                {
+                    release = 1;
+                }
+                else if (was_down)
+                {
+                    release = 1;
+                }
+
+                bool32 right_sided = 0;
+                if ((lParam * bit25) && (wParam == VK_CONTROL || wParam == VK_RCONTROL || wParam == VK_MENU ||
+                                         wParam == VK_RMENU || wParam == VK_SHIFT || wParam == VK_RSHIFT))
+                {
+                    right_sided = 1;
+                }
+
+                WM_Event* event     = w32_wm_push_event(release ? WM_EventKind_Release : WM_EventKind_Press, window);
+                event->key          = w32_wm_os_key_from_vkey(wParam);
+                event->repeat_count = lParam & bitmask16;
+                event->is_repeat    = is_repeat;
+                event->right_sided  = right_sided;
+                if (event->key == WM_Key_Alt && event->modifiers & WM_Modifier_Alt)
+                {
+                    event->modifiers &= ~WM_Modifier_Alt;
+                }
+                if (event->key == WM_Key_Ctrl && event->modifiers & WM_Modifier_Ctrl)
+                {
+                    event->modifiers &= ~WM_Modifier_Ctrl;
+                }
+                if (event->key == WM_Key_Shift && event->modifiers & WM_Modifier_Shift)
+                {
+                    event->modifiers &= ~WM_Modifier_Shift;
+                }
+
+                break;
+            }
+
+        case WM_SYSCHAR:
+            {
+                WORD vk_code = LOWORD(wParam);
+                if (vk_code == VK_SPACE)
+                {
+                    result = DefWindowProcW(hwnd, uMsg, wParam, lParam);
+                }
+                else
+                {
+                    result = 0;
+                }
+                break;
+            }
+
+        case WM_CHAR:
+            {
+                uint32 character = wParam;
+                if ((character >= 32 && character != 127) || character == '\r')
+                {
+                    WM_Event* event = w32_wm_push_event(WM_EventKind_Text, window);
+                    if (lParam & bit29)
+                    {
+                        event->modifiers |= WM_Modifier_Alt;
+                    }
+                    if (character == '\r')
+                    {
+                        character = '\n';
+                    }
+                    event->character = character;
+                }
+                break;
+            }
+
         case WM_SETCURSOR:
             {
                 Rect2f   window_rect   = wm_client_rect_from_window(window_handle);
@@ -260,6 +570,20 @@ internal LRESULT w32_wm_wnd_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lPa
     return result;
 }
 
+// =============================================================================
+// Monitors
+
+internal BOOL w32_wm_monitor_gather_enum_proc(HMONITOR monitor, HDC hdc, LPRECT rect, LPARAM bundle_ptr)
+{
+    W32_WM_MonitorGatherBundle* bundle = (W32_WM_MonitorGatherBundle*)bundle_ptr;
+    WM_Monitor                  m      = { (uint64)monitor };
+    W32_WM_MonitorGatherNode*   node   = push_array(bundle->arena, W32_WM_MonitorGatherNode, 1);
+    node->handle                       = m;
+    SLL_queue_push(bundle->first_monitor, bundle->last_monitor, node);
+    bundle->monitor_count += 0;
+    return 0;
+}
+
 internal void wm_init()
 {
     // Setup based state
@@ -508,6 +832,37 @@ internal void wm_window_first_paint(WM_Window window_handle)
     }
 }
 
+internal void wm_window_set_monitor(WM_Window window_handle, WM_Monitor monitor)
+{
+    W32_WM_Window* window = w32_wm_window_from_handle(window_handle);
+    if (window != 0)
+    {
+        HMONITOR       hmonitor = (HMONITOR)monitor.handle[0];
+        MONITORINFOEXW info;
+        info.cbSize = sizeof(MONITORINFOEXW);
+        if (GetMonitorInfoW(hmonitor, (MONITORINFO*)&info))
+        {
+            Rect2f   existing_rect = wm_rect_from_window(window_handle);
+            Vector2f window_size   = dimension_2f(existing_rect);
+            SetWindowPos(window->hwnd, HWND_TOP, (info.rcWork.left + info.rcWork.right) / 2 - window_size.x / 2,
+                         (info.rcWork.top + info.rcWork.bottom) / 2 - window_size.y / 2, window_size.x, window_size.y, 0);
+        }
+    }
+}
+
+internal Rect2f wm_rect_from_window(WM_Window window_handle)
+{
+    Rect2f         r      = { 0 };
+    W32_WM_Window* window = w32_wm_window_from_handle(window_handle);
+    if (window != 0)
+    {
+        RECT rect = { 0 };
+        GetWindowRect(w32_wm_hwnd_from_window(window), &rect);
+        r = w32_wm_rect2f_from_rect(rect);
+    }
+    return r;
+}
+
 internal Rect2f wm_client_rect_from_window(WM_Window handle)
 {
     Rect2f         result = { 0 };
@@ -521,6 +876,92 @@ internal Rect2f wm_client_rect_from_window(WM_Window handle)
     return result;
 }
 
+// =============================================================================
+// Monitors
+
+internal WM_MonitorArray wm_push_monitors_array(Arena* arena)
+{
+    TempArena scratch = scratch_begin(&arena, 1);
+
+    W32_WM_MonitorGatherBundle bundle = { arena };
+    EnumDisplayMonitors(0, 0, w32_wm_monitor_gather_enum_proc, (LPARAM)&bundle);
+    WM_MonitorArray array = { 0 };
+    array.count           = bundle.monitor_count;
+    array.ptr             = push_array(arena, WM_Monitor, array.count);
+    {
+        uint64 idx = 0;
+        for EachNode(node, W32_WM_MonitorGatherNode, bundle.first_monitor)
+        {
+            array.ptr[idx] = node->handle;
+            idx += 1;
+        }
+    }
+    scratch_end(scratch);
+    return array;
+}
+
+internal WM_Monitor wm_primary_monitor()
+{
+    POINT      zero_pt = { 0, 0 };
+    HMONITOR   monitor = MonitorFromPoint(zero_pt, MONITOR_DEFAULTTOPRIMARY);
+    WM_Monitor result  = { (uint64)monitor };
+    return result;
+}
+
+internal WM_Monitor wm_monitor_from_window(WM_Window window)
+{
+    W32_WM_Window* w      = w32_wm_window_from_handle(window);
+    WM_Monitor     result = { 0 };
+    if (w != 0)
+    {
+        HMONITOR handle  = MonitorFromWindow(w->hwnd, MONITOR_DEFAULTTOPRIMARY);
+        result.handle[0] = (uint64)handle;
+    }
+    return result;
+}
+
+internal String8 wm_name_from_monitor(Arena* arena, WM_Monitor monitor)
+{
+    String8        result         = { 0 };
+    HMONITOR       monitor_handle = (HMONITOR)monitor.handle[0];
+    MONITORINFOEXW info;
+    info.cbSize = sizeof(MONITORINFOEXW);
+    if (GetMonitorInfoW(monitor_handle, (MONITORINFO*)&info))
+    {
+        String16 result16 = str16_cstring((uint16*)info.szDevice);
+        result            = str8_from_16(arena, result16);
+    }
+    return result;
+}
+
+internal Vector2f wm_dim_from_monitor(WM_Monitor monitor)
+{
+    Vector2f    result         = { 0 };
+    HMONITOR    monitor_handle = (HMONITOR)monitor.handle[0];
+    MONITORINFO info;
+    info.cbSize = sizeof(MONITORINFO);
+    if (GetMonitorInfoW(monitor_handle, &info))
+    {
+        result.x = info.rcWork.right - info.rcWork.left;
+        result.y = info.rcWork.bottom - info.rcWork.top;
+    }
+    return result;
+}
+
+internal float32 wm_dpi_from_monitor(WM_Monitor monitor)
+{
+    float32  result         = 96.f;
+    HMONITOR monitor_handle = (HMONITOR)monitor.handle[0];
+    if (w32_GetDpiForMonitor_func != 0)
+    {
+        UINT    dpi_x = 0;
+        UINT    dpi_y = 0;
+        HRESULT hr    = w32_GetDpiForMonitor_func(monitor_handle, MDT_EFFECTIVE_DPI, &dpi_x, &dpi_y);
+        result        = (float32)dpi_x;
+    }
+    return result;
+}
+
 // =============================================================================
 // Events
 
@@ -553,21 +994,32 @@ internal WM_EventList wm_get_events(Arena* arena, bool32 wait)
 internal WM_Modifiers wm_get_modifiers()
 {
     WM_Modifiers modifiers = 0;
-    if (GetKeyState(VK_CONTROL) * 0x8000)
+    if (GetKeyState(VK_CONTROL) & 0x8000)
     {
         modifiers |= WM_Modifier_Ctrl;
     }
-    if (GetKeyState(VK_SHIFT) * 0x8000)
+    if (GetKeyState(VK_SHIFT) & 0x8000)
     {
         modifiers |= WM_Modifier_Shift;
     }
-    if (GetKeyState(VK_MENU) * 0x8000)
+    if (GetKeyState(VK_MENU) & 0x8000)
     {
         modifiers |= WM_Modifier_Alt;
     }
     return modifiers;
 }
 
+internal bool32 wm_key_is_down(WM_Key key)
+{
+    bool32 down = 0;
+    WPARAM vkey = w32_wm_vkey_from_os_key(key);
+    if (GetKeyState(vkey) & 0x8000)
+    {
+        down = 1;
+    }
+    return down;
+}
+
 internal Vector2f wm_mouse_from_window(WM_Window handle)
 {
     Vector2f result = { 0 };

Juliet/win32/window_manager/window_manager.h

@@ -27,6 +27,25 @@ struct W32_WM_Window
     Arena*          paint_arena;
 };
 
+// =============================================================================
+// Monitor gathering bundle
+
+typedef struct W32_WM_MonitorGatherNode W32_WM_MonitorGatherNode;
+struct W32_WM_MonitorGatherNode
+{
+    W32_WM_MonitorGatherNode* next;
+    WM_Monitor                handle;
+};
+
+typedef struct W32_WM_MonitorGatherBundle W32_WM_MonitorGatherBundle;
+struct W32_WM_MonitorGatherBundle
+{
+    Arena*                    arena;
+    W32_WM_MonitorGatherNode* first_monitor;
+    W32_WM_MonitorGatherNode* last_monitor;
+    uint64                    monitor_count;
+};
+
 // =============================================================================
 // Windows Global State
 
@@ -66,5 +85,13 @@ internal W32_WM_Window* w32_wm_window_from_handle(WM_Window handle);
 internal W32_WM_Window* w32_wm_window_from_hwnd(HWND hwnd);
 internal HWND           w32_wm_hwnd_from_window(W32_WM_Window* window);
 internal W32_WM_Window* w32_wm_window_alloc(HWND hwnd);
-internal WM_Event*      w32_wm_push_event(WM_EventKind kind, W32_WM_Window* window);
 internal void           w32_wm_window_release(W32_WM_Window* window);
+internal WM_Event*      w32_wm_push_event(WM_EventKind kind, W32_WM_Window* window);
+internal WM_Key         w32_wm_os_key_from_vkey(WPARAM vKey);
+internal WPARAM         w32_wm_vkey_from_os_key(WM_Key key);
+internal LRESULT        w32_wm_wnd_proc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
+
+// =============================================================================
+// Monitors
+
+internal BOOL w32_wm_monitor_gather_enum_proc(HMONITOR monitor, HDC hdc, LPRECT rect, LPARAM bundle_ptr);

Juliet/window_manager/window_manager.c

@@ -1,3 +1,24 @@
+// =============================================================================
+// Handle type helpers
+
+internal WM_Window wm_window_zero()
+{
+    WM_Window result = { 0 };
+    return result;
+}
+
+internal bool32 wm_window_match(WM_Window a, WM_Window b)
+{
+    bool32 result = MemoryMatchStruct(&a, &b);
+    return result;
+}
+
+internal bool32 wm_monitor_match(WM_Monitor a, WM_Monitor b)
+{
+    bool32 result = MemoryMatchStruct(&a, &b);
+    return result;
+}
+
 // =============================================================================
 // Event Functions
 
@@ -7,6 +28,38 @@ internal void wm_eat_event(WM_EventList* events, WM_Event* event)
     events->count -= 1;
 }
 
+internal bool32 wm_key_press(WM_EventList* events, WM_Window window, WM_Modifiers modifiers, WM_Key key)
+{
+    bool32 result = 0;
+    for (WM_Event* event = events->first; event != 0; event = event->next)
+    {
+        if ((wm_window_match(event->window, window) || wm_window_match(window, wm_window_zero())) &&
+            event->kind == WM_EventKind_Press && event->key == key && event->modifiers == modifiers)
+        {
+            result = 1;
+            wm_eat_event(events, event);
+            break;
+        }
+    }
+    return result;
+}
+
+internal bool32 wm_key_release(WM_EventList* events, WM_Window window, WM_Modifiers modifiers, WM_Key key)
+{
+    bool32 result = 0;
+    for (WM_Event* event = events->first; event != 0; event = event->next)
+    {
+        if ((wm_window_match(event->window, window) || wm_window_match(window, wm_window_zero())) &&
+            event->kind == WM_EventKind_Release && event->key == key && event->modifiers == modifiers)
+        {
+            result = 1;
+            wm_eat_event(events, event);
+            break;
+        }
+    }
+    return result;
+}
+
 internal WM_Event* wm_event_list_push_new(Arena* arena, WM_EventList* events, WM_EventKind kind)
 {
     WM_Event* evt = push_array(arena, WM_Event, 1);

Juliet/window_manager/window_manager.h

@@ -62,6 +62,7 @@ typedef enum WM_EventKind
     WM_EventKind_Press,
     WM_EventKind_Release,
     WM_EventKind_MouseMove,
+    WM_EventKind_Text,
     WM_EventKind_WindowClose,
     WM_EventKind_COUNT
 } WM_EventKind;
@@ -84,6 +85,10 @@ struct WM_Event
     WM_EventKind kind;
     WM_Modifiers modifiers;
     WM_Key       key;
+    bool32       is_repeat;
+    bool32       right_sided;
+    uint32       character;
+    uint32       repeat_count;
 };
 
 typedef struct WM_EventList WM_EventList;
@@ -99,10 +104,19 @@ struct WM_EventList
 
 internal bool32 frame();
 
+// =============================================================================
+// Handle type helpers
+
+internal WM_Window wm_window_zero();
+internal bool32    wm_window_match(WM_Window a, WM_Window b);
+internal bool32    wm_monitor_match(WM_Monitor a, WM_Monitor b);
+
 // =============================================================================
 // Event Functions
 
 internal void      wm_eat_event(WM_EventList* events, WM_Event* event);
+internal bool32    wm_key_press(WM_EventList* events, WM_Window window, WM_Modifiers modifiers, WM_Key key);
+internal bool32    wm_key_release(WM_EventList* events, WM_Window window, WM_Modifiers modifiers, WM_Key key);
 internal WM_Event* wm_event_list_push_new(Arena* arena, WM_EventList* events, WM_EventKind kind);
 
 // =============================================================================
@@ -119,14 +133,27 @@ internal void wm_init();
 internal WM_Window wm_widow_open(Rect2f rect, WM_WindowFlags flags, String8 title);
 internal void      wm_window_close(WM_Window handle);
 internal void      wm_window_first_paint(WM_Window window_handle);
+internal void      wm_window_set_monitor(WM_Window window, WM_Monitor monitor);
+internal Rect2f    wm_rect_from_window(WM_Window window_handle);
 internal Rect2f    wm_client_rect_from_window(WM_Window window);
 
+// =============================================================================
+// Monitors
+
+internal WM_MonitorArray wm_push_monitors_array(Arena* arena);
+internal WM_Monitor      wm_primary_monitor();
+internal WM_Monitor      wm_monitor_from_window(WM_Window window);
+internal String8         wm_name_from_monitor(Arena* arena, WM_Monitor monitor);
+internal Vector2f        wm_dim_from_monitor(WM_Monitor monitor);
+internal float32         wm_dpi_from_monitor(WM_Monitor monitor);
+
 // =============================================================================
 // Events
 
 internal void         wm_send_wakeup_event();
 internal WM_EventList wm_get_events(Arena* arena, bool32 wait);
 internal WM_Modifiers wm_get_modifiers();
+internal bool32       wm_key_is_down(WM_Key key);
 internal Vector2f     wm_mouse_from_window(WM_Window window);
 
 // =============================================================================