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WinRT: added support for alpha-blended texture rendering

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This commit is contained in:
David Ludwig 2013-02-23 22:58:09 -05:00
parent 76a8817338
commit 5520a12a33
1 changed files with 37 additions and 12 deletions
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47
src/render/direct3d11/SDL_render_d3d11.cpp
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@ -89,18 +89,22 @@ HRESULT D3D11_CreateWindowSizeDependentResources(SDL_Renderer * renderer);
HRESULT D3D11_UpdateForWindowSizeChange(SDL_Renderer * renderer);
HRESULT D3D11_HandleDeviceLost(SDL_Renderer * renderer);
extern "C" {
SDL_RenderDriver D3D11_RenderDriver = {
// WinRT, TODO: fill in the Direct3D 11.1 renderer's max texture width and height
extern "C" SDL_RenderDriver D3D11_RenderDriver = {
D3D11_CreateRenderer,
{
"direct3d 11.1",
(SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_TARGETTEXTURE),
1,
{SDL_PIXELFORMAT_RGB888},
0,
0}
};
}
(SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC | SDL_RENDERER_TARGETTEXTURE), // flags. see SDL_RendererFlags
2, // num_texture_formats
{ // texture_formats
SDL_PIXELFORMAT_RGB888,
SDL_PIXELFORMAT_ARGB8888
},
0, // max_texture_width
0 // max_texture_height
}
};
//typedef struct
//{
@ -782,6 +786,20 @@ D3D11_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
D3D11_RenderData *rendererData = (D3D11_RenderData *) renderer->driverdata;
D3D11_TextureData *textureData;
HRESULT result;
DXGI_FORMAT textureFormat = DXGI_FORMAT_UNKNOWN;
switch (texture->format) {
case SDL_PIXELFORMAT_ARGB8888:
textureFormat = DXGI_FORMAT_B8G8R8A8_UNORM;
break;
case SDL_PIXELFORMAT_RGB888:
textureFormat = DXGI_FORMAT_B8G8R8X8_UNORM;
break;
default:
SDL_SetError("%s, An unsupported SDL pixel format (0x%x) was specified",
__FUNCTION__, texture->format);
return -1;
}
textureData = new D3D11_TextureData;
if (!textureData) {
@ -799,7 +817,7 @@ D3D11_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
textureDesc.Height = texture->h;
textureDesc.MipLevels = 1;
textureDesc.ArraySize = 1;
textureDesc.Format = DXGI_FORMAT_B8G8R8X8_UNORM;
textureDesc.Format = textureFormat;
textureDesc.SampleDesc.Count = 1;
textureDesc.SampleDesc.Quality = 0;
textureDesc.Usage = D3D11_USAGE_DYNAMIC;
@ -1099,8 +1117,13 @@ D3D11_RenderStartDrawOp(SDL_Renderer * renderer)
0,
0
);
}
switch (renderer->blendMode) {
static void
D3D11_RenderSetBlendMode(SDL_Renderer * renderer, SDL_BlendMode blendMode)
{
D3D11_RenderData *rendererData = (D3D11_RenderData *) renderer->driverdata;
switch (blendMode) {
case SDL_BLENDMODE_BLEND:
rendererData->d3dContext->OMSetBlendState(rendererData->blendModeBlend.Get(), 0, 0xFFFFFFFF);
break;
@ -1168,6 +1191,7 @@ D3D11_RenderFillRects(SDL_Renderer * renderer,
for (int i = 0; i < count; ++i) {
D3D11_RenderStartDrawOp(renderer);
D3D11_RenderSetBlendMode(renderer, renderer->blendMode);
#if 0
// Set colors for the test pattern:
@ -1211,6 +1235,7 @@ D3D11_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
D3D11_TextureData *textureData = (D3D11_TextureData *) texture->driverdata;
D3D11_RenderStartDrawOp(renderer);
D3D11_RenderSetBlendMode(renderer, texture->blendMode);
// WinRT, TODO: get srcrect working in tandem with SDL_RenderCopy, etc.
VertexPositionColor vertices[] = {