Day 36 complete.

handmade.c

@@ -84,6 +84,36 @@ static void DrawRectangle(game_offscreen_buffer *Buffer, F32 RealMinX, F32 RealM
     }
 }
 
+#pragma pack(push, 1)
+typedef struct bitmap_header {
+    U16 FileType;
+    U32 FileSize;
+    U16 Reserved1;
+    U16 Reserved2;
+    U32 BitmapOffset;
+    U32 Size;
+    S32 Width;
+    S32 Height;
+    U16 Planes;
+    U16 BitsPerPixel;
+} bitmap_header;
+#pragma pack(pop)
+
+static U32 *LoadBMP(thread_context *Thread, debug_read_file_result (*DEBUGPlatformReadEntireFile)(thread_context *Thread, const char *), char *FileName)
+{
+    U32 *Result = 0;
+
+    debug_read_file_result ReadResult = DEBUGPlatformReadEntireFile(Thread, FileName);
+    if(ReadResult.ContentsSize > 0) {
+        bitmap_header *Header = (bitmap_header *)ReadResult.Contents;
+
+        U32 *Pixels = (U32 *)((U8 *)ReadResult.Contents + Header->BitmapOffset);
+        Result = Pixels;
+    }
+
+    return Result;
+}
+
 void UpdateAndRender(thread_context *Thread, game_memory *Memory, game_input *Input, game_offscreen_buffer *Buffer, game_sound_output_buffer *SoundBuffer)
 {
 
@@ -100,6 +130,8 @@ void UpdateAndRender(thread_context *Thread, game_memory *Memory, game_input *In
 
     GameState = (game_state *)Memory->PermanentStorage;
     if(!Memory->IsInitialized) {
+        GameState->PixelPointer = LoadBMP(Thread, Memory->DEBUGPlatformReadEntireFile, "data/test_background.bmp");
+
         GameState->PlayerP.AbsTileX = 2;
         GameState->PlayerP.AbsTileY = 3;
         GameState->PlayerP.OffsetX = 5.0f;
@@ -341,6 +373,16 @@ void UpdateAndRender(thread_context *Thread, game_memory *Memory, game_input *In
     F32 PlayerTop = ScreenCenterY - MetersToPixels*PlayerHeight;
     DrawRectangle(Buffer, PlayerLeft, PlayerTop, PlayerLeft + MetersToPixels*PlayerWidth, PlayerTop + MetersToPixels*PlayerHeight, PlayerR, PlayerG, PlayerB);
 
+#if 0
+    U32 *Source = GameState->PixelPointer;
+    U32 *Dest = (U32 *)Buffer->Memory;
+    for(S32 Y = 0; Y < Buffer->Height; Y++) {
+        for(S32 X = 0; X < Buffer->Width; X++) {
+            *Dest++ = *Source++;
+        }
+    }
+#endif
+
     GameOutputSound(GameState, SoundBuffer, 400);
 }