diff --git a/code/renderer/tr_backend_gl3.cpp b/code/renderer/tr_backend_gl3.cpp index 1539dcf..6d78ced 100644 --- a/code/renderer/tr_backend_gl3.cpp +++ b/code/renderer/tr_backend_gl3.cpp @@ -249,6 +249,7 @@ struct OpenGL3 ArrayBuffer indexBuffer; GLuint boundTextures[2]; + int activeTextureSlot; cullType_t cullType; unsigned int srcBlendBits; unsigned int dstBlendBits; @@ -1126,6 +1127,17 @@ static void FBO_ResolveColor() glBlitFramebuffer(0, 0, w, h, 0, 0, w, h, GL_COLOR_BUFFER_BIT, GL_LINEAR); } +static void ApplyActiveTexture(int slot) +{ + if(slot == gl.activeTextureSlot) + { + return; + } + + glActiveTexture(GL_TEXTURE0 + slot); + gl.activeTextureSlot = slot; +} + static void ApplyPipeline(PipelineId pipelineId) { if(pipelineId == gl.pipelineId) @@ -1165,7 +1177,7 @@ static void ApplyPipeline(PipelineId pipelineId) } glUniform1i(pipeline->textureLocations[0], 0); - glActiveTexture(GL_TEXTURE1); + ApplyActiveTexture(1); if(pipelineId == PID_SOFT_SPRITE && gl.fbMSEnabled) { // we don't have a "BindTextureMS" function for caching/tracking MS texture binds @@ -1173,7 +1185,7 @@ static void ApplyPipeline(PipelineId pipelineId) glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, gl.fbMS.depthStencil); } glUniform1i(pipeline->textureLocations[1], 1); - glActiveTexture(GL_TEXTURE0); + ApplyActiveTexture(0); memset(pipeline->uniformsDirty, 0xFF, sizeof(pipeline->uniformsDirty)); } @@ -1213,6 +1225,7 @@ static void BindTexture(int slot, GLuint texture) return; } + ApplyActiveTexture(slot); glBindTexture(GL_TEXTURE_2D, texture); gl.boundTextures[slot] = texture; } @@ -1740,6 +1753,7 @@ static void SetDefaultState() gl.boundTextures[0] = GLuint(-1); gl.boundTextures[1] = GLuint(-1); + gl.activeTextureSlot = 0; gl.cullType = CT_TWO_SIDED; gl.srcBlendBits = GLS_SRCBLEND_SRC_ALPHA; gl.dstBlendBits = GLS_DSTBLEND_ONE_MINUS_SRC_ALPHA; @@ -2209,7 +2223,6 @@ static void DrawGeneric() UploadVertexArray(VB_COLOR, tess.svars[i].colors); BindBundle(0, &stage->bundle); - glActiveTexture(GL_TEXTURE1); if(stage->mtStages == 0) { @@ -2226,8 +2239,6 @@ static void DrawGeneric() ++i; } - glActiveTexture(GL_TEXTURE0); - if(pipeline->uniformsDirty[GU_ALPHA_TEX]) { glUniform2ui(pipeline->uniformLocations[GU_ALPHA_TEX], gl.alphaTest, gl.texEnv); @@ -2246,9 +2257,7 @@ static void DrawGeneric() UploadVertexArray(VB_COLOR, tess.svarsFog.colors); BindImage(0, tr.fogImage); - glActiveTexture(GL_TEXTURE1); BindImage(1, tr.whiteImage); - glActiveTexture(GL_TEXTURE0); ApplyTexEnv(TE_DISABLED); if(pipeline->uniformsDirty[GU_ALPHA_TEX]) @@ -2385,9 +2394,7 @@ static void DrawDepthFade() BindBundle(0, &stage->bundle); if(!gl.fbMSEnabled) { - glActiveTexture(GL_TEXTURE1); BindTexture(1, gl.fbSS[gl.fbReadIndex].depthStencil); - glActiveTexture(GL_TEXTURE0); } DrawElements(tess.numIndexes);