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Double buffer source texture, optimize intermediate blitting.

This commit is contained in:
Christian Speckner 2020-01-25 19:51:46 +00:00
parent ec6348894a
commit 11f4846f21
2 changed files with 18 additions and 8 deletions
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24
src/common/sdl_blitter/QisBlitter.cxx
View File

@ -94,7 +94,7 @@ void QisBlitter::blit(SDL_Surface& surface)
recreateTexturesIfNecessary();
SDL_Texture* texture = myIntermediateTexture;
SDL_Texture* intermediateTexture = myIntermediateTexture;
if(myStaticData == nullptr) {
SDL_UpdateTexture(mySrcTexture, &mySrcRect, surface.pixels, surface.pitch);
@ -102,10 +102,14 @@ void QisBlitter::blit(SDL_Surface& surface)
blitToIntermediate();
myIntermediateTexture = mySecondaryIntermedateTexture;
mySecondaryIntermedateTexture = texture;
mySecondaryIntermedateTexture = intermediateTexture;
SDL_Texture* temporary = mySrcTexture;
mySrcTexture = mySecondarySrcTexture;
mySecondarySrcTexture = temporary;
}
SDL_RenderCopy(myFB.renderer(), texture, &myIntermediateRect, &myDstRect);
SDL_RenderCopy(myFB.renderer(), intermediateTexture, &myIntermediateRect, &myDstRect);
}
@ -117,9 +121,11 @@ void QisBlitter::blitToIntermediate()
SDL_Rect r = mySrcRect;
r.x = r.y = 0;
SDL_UpdateTexture(myIntermediateTexture, nullptr, myBlankBuffer.get(), 4 * myIntermediateRect.w);
SDL_SetRenderTarget(myFB.renderer(), myIntermediateTexture);
SDL_SetRenderDrawColor(myFB.renderer(), 0, 0, 0, 255);
SDL_RenderClear(myFB.renderer());
SDL_RenderCopy(myFB.renderer(), mySrcTexture, &r, &myIntermediateRect);
SDL_SetRenderTarget(myFB.renderer(), nullptr);
@ -151,8 +157,12 @@ void QisBlitter::recreateTexturesIfNecessary()
mySrcTexture = SDL_CreateTexture(myFB.renderer(), myFB.pixelFormat().format,
texAccess, mySrcRect.w, mySrcRect.h);
myBlankBuffer = make_unique<uInt32[]>(4 * myIntermediateRect.w * myIntermediateRect.h);
memset(myBlankBuffer.get(), 0, 4 * myIntermediateRect.w * myIntermediateRect.h);
if (myStaticData == nullptr) {
mySecondarySrcTexture = SDL_CreateTexture(myFB.renderer(), myFB.pixelFormat().format,
texAccess, mySrcRect.w, mySrcRect.h);
} else {
mySecondarySrcTexture = nullptr;
}
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1");

2
src/common/sdl_blitter/QisBlitter.hxx
View File

@ -46,6 +46,7 @@ class QisBlitter : public Blitter {
FrameBufferSDL2& myFB;
SDL_Texture* mySrcTexture{nullptr};
SDL_Texture* mySecondarySrcTexture{nullptr};
SDL_Texture* myIntermediateTexture{nullptr};
SDL_Texture* mySecondaryIntermedateTexture{nullptr};
@ -56,7 +57,6 @@ class QisBlitter : public Blitter {
bool myRecreateTextures{false};
SDL_Surface* myStaticData{nullptr};
unique_ptr<uInt32[]> myBlankBuffer;
private: