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stella
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Use and alternate between two textures for TIA image. 

* Avoids blocking if the texture is still locked in the rendering pipeline
      and fixes framerates on the R77.
This commit is contained in:
Christian Speckner 2019-02-18 21:07:00 +01:00
parent 2d0221ae1f
commit f511f9fbe7
2 changed files with 28 additions and 9 deletions
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36
src/common/FBSurfaceSDL2.cxx
View File

@ -25,6 +25,7 @@ FBSurfaceSDL2::FBSurfaceSDL2(FrameBufferSDL2& buffer,
: myFB(buffer),
mySurface(nullptr),
myTexture(nullptr),
mySecondaryTexture(nullptr),
mySurfaceIsDirty(true),
myIsVisible(true),
myTexAccess(SDL_TEXTUREACCESS_STREAMING),
@ -135,9 +136,15 @@ bool FBSurfaceSDL2::render()
if(myIsVisible)
{
if(myTexAccess == SDL_TEXTUREACCESS_STREAMING)
SDL_Texture* texture = myTexture;
if(myTexAccess == SDL_TEXTUREACCESS_STREAMING) {
SDL_UpdateTexture(myTexture, &mySrcR, mySurface->pixels, mySurface->pitch);
SDL_RenderCopy(myFB.myRenderer, myTexture, &mySrcR, &myDstR);
myTexture = mySecondaryTexture;
mySecondaryTexture = texture;
}
SDL_RenderCopy(myFB.myRenderer, texture, &mySrcR, &myDstR);
return true;
}
@ -157,8 +164,10 @@ void FBSurfaceSDL2::free()
{
ASSERT_MAIN_THREAD;
if(myTexture)
{
SDL_Texture* textures[] = {myTexture, mySecondaryTexture};
for (SDL_Texture* texture: textures) {
if (!texture) continue;
SDL_DestroyTexture(myTexture);
myTexture = nullptr;
}
@ -174,15 +183,24 @@ void FBSurfaceSDL2::reload()
myTexture = SDL_CreateTexture(myFB.myRenderer, myFB.myPixelFormat->format,
myTexAccess, mySurface->w, mySurface->h);
if (myTexAccess == SDL_TEXTUREACCESS_STREAMING)
mySecondaryTexture = SDL_CreateTexture(myFB.myRenderer, myFB.myPixelFormat->format,
myTexAccess, mySurface->w, mySurface->h);
// If the data is static, we only upload it once
if(myTexAccess == SDL_TEXTUREACCESS_STATIC)
SDL_UpdateTexture(myTexture, nullptr, myStaticData.get(), myStaticPitch);
// Blending enabled?
if(myBlendEnabled)
{
SDL_SetTextureBlendMode(myTexture, SDL_BLENDMODE_BLEND);
SDL_SetTextureAlphaMod(myTexture, myBlendAlpha);
SDL_Texture* textures[] = {myTexture, mySecondaryTexture};
for (SDL_Texture* texture: textures) {
if (!texture) continue;
// Blending enabled?
if(myBlendEnabled)
{
SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
SDL_SetTextureAlphaMod(texture, myBlendAlpha);
}
}
}

1
src/common/FBSurfaceSDL2.hxx
View File

@ -78,6 +78,7 @@ class FBSurfaceSDL2 : public FBSurface
SDL_Surface* mySurface;
SDL_Texture* myTexture;
SDL_Texture* mySecondaryTexture;
SDL_Rect mySrcR, myDstR;
bool mySurfaceIsDirty;