1 files changed, 77 insertions, 0 deletions
diff --git a/src/graveyard/win32/win32_window.cpp b/src/graveyard/win32/win32_window.cpp
new file mode 100644
index 0000000..6ec0891
--- /dev/null
+++ b/src/graveyard/win32/win32_window.cpp
@@ -0,0 +1,77 @@
+#include <platform/platform.h>
+#include <windows.h>
+
+struct Win32OffscreenBuffer {
+    PlatformOffscreenBuffer platform_offscreen_buffer;
+    BITMAPINFO bitmap_info;
+};
+
+struct PlatformWindow {
+    HWND wnd;
+    HDC dc;
+    Win32OffscreenBuffer offscreen_buffer;
+};
+
+Win32Window::Win32Window(HWND handle, HDC dc)
+{
+    m_Wnd = handle;
+    m_Dc = dc;
+    memset((void*)&m_OffscreenBuffer, 0, sizeof(m_OffscreenBuffer));
+}
+
+bool
+Win32Window::RecreateOffscreenBuffer(i32 width, i32 height)
+{
+    Sys_Offscreen_Buffer *sys_screen = &m_OffscreenBuffer.sys_offscreen_buffer;
+
+    sys_screen->red_shift   = 16;
+    sys_screen->green_shift = 8;
+    sys_screen->blue_shift  = 0;
+    sys_screen->alpha_shift = 24;
+
+    u32 *new_pixels = (u32*)malloc(sizeof(sys_screen->pixels[0]) * width * height);
+    if (!new_pixels)
+    {
+        return false;
+    }
+    free(sys_screen->pixels);
+
+    sys_screen->width = width;
+    sys_screen->height = height;
+    sys_screen->pixels = new_pixels;
+
+
+    BITMAPINFO *bmi = &m_OffscreenBuffer.bitmap_info;
+    memset(bmi, 0, sizeof(*bmi));
+    bmi->bmiHeader.biSize = sizeof(bmi->bmiHeader);
+    bmi->bmiHeader.biWidth = width;
+    bmi->bmiHeader.biHeight = height;
+    bmi->bmiHeader.biPlanes = 1;
+    bmi->bmiHeader.biBitCount = 32;
+    bmi->bmiHeader.biCompression = BI_RGB;
+
+    return true;
+}
+
+Sys_Offscreen_Buffer *
+Win32Window::GetOffscreenBuffer()
+{
+    Sys_Offscreen_Buffer *screen = &m_OffscreenBuffer.sys_offscreen_buffer;
+    return screen;
+}
+
+void
+Win32Window::ShowOffscreenBuffer()
+{
+    i32 width = m_OffscreenBuffer.sys_offscreen_buffer.width;
+    i32 height = m_OffscreenBuffer.sys_offscreen_buffer.height;
+    u32 *pixels = m_OffscreenBuffer.sys_offscreen_buffer.pixels;
+    BITMAPINFO *bmi = &m_OffscreenBuffer.bitmap_info;
+
+    StretchDIBits(m_Dc,
+                  0, 0, width, height,
+                  0, 0, width, height,
+                  pixels, bmi, DIB_RGB_COLORS, SRCCOPY);
+
+}
+