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Finished implementing RenderReadPixels()

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--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404297
This commit is contained in:
Sam Lantinga 2009-12-12 04:01:40 +00:00
parent d122df1db0
commit 15e7c4789c
1 changed files with 54 additions and 31 deletions
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85
src/video/win32/SDL_d3drender.c
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@ -1206,44 +1206,67 @@ static int
D3D_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, void * pixels, int pitch)
{
BYTE * pBytes;
D3DLOCKED_RECT lockedRect;
BYTE b, g, r, a;
unsigned long index;
int cur_mouse;
int x, y;
LPDIRECT3DSURFACE9 backBuffer;
LPDIRECT3DSURFACE9 pickOffscreenSurface;
D3D_RenderData *data = (D3D_RenderData *) renderer->driverdata;
SDL_Window *window = SDL_GetWindowFromID(renderer->window);
SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
D3DSURFACE_DESC desc;
LPDIRECT3DSURFACE9 backBuffer;
LPDIRECT3DSURFACE9 surface;
RECT d3drect;
D3DLOCKED_RECT locked;
HRESULT result;
D3D_RenderData * data = (D3D_RenderData *) renderer->driverdata;
IDirect3DDevice9_GetBackBuffer(data->device, 0, 0, D3DBACKBUFFER_TYPE_MONO, &backBuffer);
IDirect3DSurface9_GetDesc(backBuffer, &desc);
result = IDirect3DDevice9_GetBackBuffer(data->device, 0, 0, D3DBACKBUFFER_TYPE_MONO, &backBuffer);
if (FAILED(result)) {
D3D_SetError("GetBackBuffer()", result);
return -1;
}
IDirect3DDevice9_CreateOffscreenPlainSurface(data->device, desc.Width, desc.Height, desc.Format, D3DPOOL_SYSTEMMEM, &pickOffscreenSurface, NULL);
result = IDirect3DSurface9_GetDesc(backBuffer, &desc);
if (FAILED(result)) {
D3D_SetError("GetDesc()", result);
IDirect3DSurface9_Release(backBuffer);
return -1;
}
IDirect3DDevice9_GetRenderTargetData(data->device, backBuffer, pickOffscreenSurface);
result = IDirect3DDevice9_CreateOffscreenPlainSurface(data->device, desc.Width, desc.Height, desc.Format, D3DPOOL_SYSTEMMEM, &surface, NULL);
if (FAILED(result)) {
D3D_SetError("CreateOffscreenPlainSurface()", result);
IDirect3DSurface9_Release(backBuffer);
return -1;
}
IDirect3DSurface9_LockRect(pickOffscreenSurface, &lockedRect, NULL, D3DLOCK_READONLY);
pBytes = (BYTE*)lockedRect.pBits;
IDirect3DSurface9_UnlockRect(pickOffscreenSurface);
result = IDirect3DDevice9_GetRenderTargetData(data->device, backBuffer, surface);
if (FAILED(result)) {
D3D_SetError("GetRenderTargetData()", result);
IDirect3DSurface9_Release(surface);
IDirect3DSurface9_Release(backBuffer);
return -1;
}
// just to debug -->
cur_mouse = SDL_SelectMouse(-1);
SDL_GetMouseState(cur_mouse, &x, &y);
index = (x * 4 + (y * lockedRect.Pitch));
d3drect.left = rect->x;
d3drect.right = rect->x + rect->w;
d3drect.top = rect->y;
d3drect.bottom = rect->y + rect->h;
b = pBytes[index];
g = pBytes[index+1];
r = pBytes[index+2];
a = pBytes[index+3];
// <--
return -1;
result = IDirect3DSurface9_LockRect(surface, &locked, &d3drect, D3DLOCK_READONLY);
if (FAILED(result)) {
D3D_SetError("LockRect()", result);
IDirect3DSurface9_Release(surface);
IDirect3DSurface9_Release(backBuffer);
return -1;
}
SDL_ConvertPixels(rect->w, rect->h,
display->current_mode.format, locked.pBits, locked.Pitch,
format, pixels, pitch);
IDirect3DSurface9_UnlockRect(surface);
IDirect3DSurface9_Release(surface);
IDirect3DSurface9_Release(backBuffer);
return 0;
}
static int