void FGLRenderBuffers::CreateBloom(int width, int height) { ClearBloom(); // No scene, no bloom! if (width <= 0 || height <= 0) return; int bloomWidth = (width + 1) / 2; int bloomHeight = (height + 1) / 2; for (int i = 0; i < NumBloomLevels; i++) { auto &level = BloomLevels[i]; level.Width = (bloomWidth + 1) / 2; level.Height = (bloomHeight + 1) / 2; level.VTexture = Create2DTexture("Bloom.VTexture", GL_RGBA16F, level.Width, level.Height); level.HTexture = Create2DTexture("Bloom.HTexture", GL_RGBA16F, level.Width, level.Height); level.VFramebuffer = CreateFrameBuffer("Bloom.VFramebuffer", level.VTexture); level.HFramebuffer = CreateFrameBuffer("Bloom.HFramebuffer", level.HTexture); bloomWidth = level.Width; bloomHeight = level.Height; } }
FGLRenderBuffers::~FGLRenderBuffers() { ClearScene(); ClearPipeline(); ClearEyeBuffers(); ClearBloom(); ClearExposureLevels(); }
bool FGLRenderBuffers::Setup(int width, int height, int sceneWidth, int sceneHeight) { if (gl_renderbuffers != BuffersActive) { if (BuffersActive) glBindFramebuffer(GL_FRAMEBUFFER, mOutputFB); BuffersActive = gl_renderbuffers; GLRenderer->mShaderManager->ResetFixedColormap(); } if (!IsEnabled()) return false; if (width <= 0 || height <= 0) I_FatalError("Requested invalid render buffer sizes: screen = %dx%d", width, height); int samples = clamp((int)gl_multisample, 0, mMaxSamples); bool needsSceneTextures = (gl_ssao != 0); GLint activeTex; GLint textureBinding; glGetIntegerv(GL_ACTIVE_TEXTURE, &activeTex); glActiveTexture(GL_TEXTURE0); glGetIntegerv(GL_TEXTURE_BINDING_2D, &textureBinding); if (width != mWidth || height != mHeight) CreatePipeline(width, height); if (width != mWidth || height != mHeight || mSamples != samples || mSceneUsesTextures != needsSceneTextures) CreateScene(width, height, samples, needsSceneTextures); mWidth = width; mHeight = height; mSamples = samples; mSceneUsesTextures = needsSceneTextures; // Bloom bluring buffers need to match the scene to avoid bloom bleeding artifacts if (mSceneWidth != sceneWidth || mSceneHeight != sceneHeight) { CreateBloom(sceneWidth, sceneHeight); CreateExposureLevels(sceneWidth, sceneHeight); CreateAmbientOcclusion(sceneWidth, sceneHeight); mSceneWidth = sceneWidth; mSceneHeight = sceneHeight; } glBindTexture(GL_TEXTURE_2D, textureBinding); glActiveTexture(activeTex); glBindRenderbuffer(GL_RENDERBUFFER, 0); glBindFramebuffer(GL_FRAMEBUFFER, 0); if (FailedCreate) { ClearScene(); ClearPipeline(); ClearEyeBuffers(); ClearBloom(); ClearExposureLevels(); mWidth = 0; mHeight = 0; mSamples = 0; mSceneWidth = 0; mSceneHeight = 0; } return !FailedCreate; }