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WinRT: d3d11 blend mode bug fixes 

The destination target's alpha wasn't getting set correctly in many cases.  Among other problems, this prevented some alpha-blended textures from displaying correctly in Windows Phone 8's multitasking screen.

The d3d11 renderer now uses the same blending settings found in the d3d9 renderer.
This commit is contained in:
David Ludwig 2013-12-30 11:59:04 -05:00
parent 910c1cd0a0
commit 44b0e901f0
1 changed files with 16 additions and 8 deletions
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24
src/render/direct3d11/SDL_render_d3d11.cpp
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@ -663,6 +663,8 @@ D3D11_CreateBlendMode(SDL_Renderer * renderer,
BOOL enableBlending,
D3D11_BLEND srcBlend,
D3D11_BLEND destBlend,
D3D11_BLEND srcBlendAlpha,
D3D11_BLEND destBlendAlpha,
ID3D11BlendState ** blendStateOutput)
{
D3D11_RenderData *data = (D3D11_RenderData *) renderer->driverdata;
@ -676,8 +678,8 @@ D3D11_CreateBlendMode(SDL_Renderer * renderer,
blendDesc.RenderTarget[0].SrcBlend = srcBlend;
blendDesc.RenderTarget[0].DestBlend = destBlend;
blendDesc.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
blendDesc.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE;
blendDesc.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
blendDesc.RenderTarget[0].SrcBlendAlpha = srcBlendAlpha;
blendDesc.RenderTarget[0].DestBlendAlpha = destBlendAlpha;
blendDesc.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
blendDesc.RenderTarget[0].RenderTargetWriteMask = D3D11_COLOR_WRITE_ENABLE_ALL;
result = data->d3dDevice->CreateBlendState(&blendDesc, blendStateOutput);
@ -934,8 +936,10 @@ D3D11_CreateDeviceResources(SDL_Renderer * renderer)
result = D3D11_CreateBlendMode(
renderer,
TRUE,
D3D11_BLEND_SRC_ALPHA,
D3D11_BLEND_INV_SRC_ALPHA,
D3D11_BLEND_SRC_ALPHA, /* srcBlend */
D3D11_BLEND_INV_SRC_ALPHA, /* destBlend */
D3D11_BLEND_ONE, /* srcBlendAlpha */
D3D11_BLEND_INV_SRC_ALPHA, /* destBlendAlpha */
&data->blendModeBlend);
if (FAILED(result)) {
// D3D11_CreateBlendMode will set the SDL error, if it fails
@ -945,8 +949,10 @@ D3D11_CreateDeviceResources(SDL_Renderer * renderer)
result = D3D11_CreateBlendMode(
renderer,
TRUE,
D3D11_BLEND_SRC_ALPHA,
D3D11_BLEND_ONE,
D3D11_BLEND_SRC_ALPHA, /* srcBlend */
D3D11_BLEND_ONE, /* destBlend */
D3D11_BLEND_ZERO, /* srcBlendAlpha */
D3D11_BLEND_ONE, /* destBlendAlpha */
&data->blendModeAdd);
if (FAILED(result)) {
// D3D11_CreateBlendMode will set the SDL error, if it fails
@ -956,8 +962,10 @@ D3D11_CreateDeviceResources(SDL_Renderer * renderer)
result = D3D11_CreateBlendMode(
renderer,
TRUE,
D3D11_BLEND_ZERO,
D3D11_BLEND_SRC_COLOR,
D3D11_BLEND_ZERO, /* srcBlend */
D3D11_BLEND_SRC_COLOR, /* destBlend */
D3D11_BLEND_ZERO, /* srcBlendAlpha */
D3D11_BLEND_ONE, /* destBlendAlpha */
&data->blendModeMod);
if (FAILED(result)) {
// D3D11_CreateBlendMode will set the SDL error, if it fails