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Always glClear before blitting to screen 

Prevents a distorted screen when an error happens during
script loading (ie. before the first drawn frame) and fullscreen
is turned on in the config.
This will also be necessarry once fixed aspect ratio is implemented.
This commit is contained in:
Jonas Kulla 2013-09-02 17:31:34 +02:00
parent 0477c3f8db
commit 8674cb8e06
1 changed files with 7 additions and 0 deletions
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7
src/graphics.cpp
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@ -565,6 +565,7 @@ struct GraphicsPrivate
void blitToScreen()
{
FBO::unbind(FBO::Draw);
glClear(GL_COLOR_BUFFER_BIT);
blitBufferFlippedScaled();
}
@ -680,6 +681,8 @@ void Graphics::transition(int duration,
/* Capture new scene */
p->compositeToBuffer(p->currentScene.fbo);
/* If no transition bitmap is provided,
* we can use a simplified shader */
if (transMap)
{
TransShader &shader = gState->transShader();
@ -717,12 +720,15 @@ void Graphics::transition(int duration,
else
gState->sTransShader().setProg(prog);
/* Draw the composed frame to a buffer first
* (we need this because we're skipping PingPong) */
FBO::bind(p->transBuffer.fbo);
glClear(GL_COLOR_BUFFER_BIT);
p->screenQuad.draw();
p->checkResize();
/* Then blit it flipped and scaled to the screen */
FBO::bind(p->transBuffer.fbo, FBO::Read);
p->blitToScreen();
@ -848,6 +854,7 @@ void Graphics::repaintWait(volatile bool *exitCond)
{
gState->checkShutdown();
glClear(GL_COLOR_BUFFER_BIT);
p->blitBufferFlippedScaled();
SDL_GL_SwapWindow(p->threadData->window);
p->fpsLimiter.delay();