Don't use GL_FRAMEBUFFER_SRGB in GLES

src/graphics/gl_headers.hpp

@@ -61,7 +61,6 @@ extern "C" {
 #if defined(USE_GLES2)
 #define GL_BGRA 0x80E1
 #define GL_BGR 0x80E0
-#define GL_FRAMEBUFFER_SRGB 0x8DB9
 #define GL_FRAMEBUFFER_COMPLETE_EXT GL_FRAMEBUFFER_COMPLETE
 
 // The glDrawElementsBaseVertex is available only in OpenGL ES 3.2. At this

src/graphics/post_processing.cpp

@@ -1577,7 +1577,9 @@ FrameBuffer *PostProcessing::render(scene::ICameraSceneNode * const camnode,
     if (GraphicsRestrictions::isDisabled(GraphicsRestrictions::GR_FRAMEBUFFER_SRGB_WORKING))
         return in_fbo;
 
+#if !defined(USE_GLES2)
     glEnable(GL_FRAMEBUFFER_SRGB);
+#endif
     out_fbo = &rtts->getFBO(FBO_MLAA_COLORS);
     out_fbo->bind();
     renderPassThrough(in_fbo->getRTT()[0],
@@ -1593,7 +1595,9 @@ FrameBuffer *PostProcessing::render(scene::ICameraSceneNode * const camnode,
                   *out_fbo);
         PROFILER_POP_CPU_MARKER();
     }
+#if !defined(USE_GLES2)
     glDisable(GL_FRAMEBUFFER_SRGB);
+#endif
 
     return out_fbo;
 }   // render

src/graphics/render_target.cpp

@@ -147,12 +147,16 @@ void GL3RenderTarget::draw2DImage(const irr::core::rect<s32>& dest_rect,
     assert(m_frame_buffer != NULL);
     irr::core::rect<s32> source_rect(0, 0, m_frame_buffer->getWidth(),
                                      m_frame_buffer->getHeight());
+#if !defined(USE_GLES2)
     glEnable(GL_FRAMEBUFFER_SRGB);
+#endif
     draw2DImageFromRTT(m_frame_buffer->getRTT()[0],
                        m_frame_buffer->getWidth(), m_frame_buffer->getHeight(),
                        dest_rect, source_rect,
                        clip_rect, colors, use_alpha_channel_of_texture);
+#if !defined(USE_GLES2)
     glDisable(GL_FRAMEBUFFER_SRGB);
+#endif
 
 }   // draw2DImage
 

src/graphics/shader_based_renderer.cpp

@@ -304,8 +304,10 @@ void ShaderBasedRenderer::renderScene(scene::ICameraSceneNode * const camnode,
     else
     {
         // We need a cleared depth buffer for some effect (eg particles depth blending)
+#if !defined(USE_GLES2)
         if (GraphicsRestrictions::isDisabled(GraphicsRestrictions::GR_FRAMEBUFFER_SRGB_WORKING))
             glDisable(GL_FRAMEBUFFER_SRGB);
+#endif
         m_rtts->getFBO(FBO_NORMAL_AND_DEPTHS).bind();
         // Bind() modifies the viewport. In order not to affect anything else,
         // the viewport is just reset here and not removed in Bind().
@@ -315,8 +317,10 @@ void ShaderBasedRenderer::renderScene(scene::ICameraSceneNode * const camnode,
                    vp.LowerRightCorner.X - vp.UpperLeftCorner.X,
                    vp.LowerRightCorner.Y - vp.UpperLeftCorner.Y);
         glClear(GL_DEPTH_BUFFER_BIT);
+#if !defined(USE_GLES2)
         if (GraphicsRestrictions::isDisabled(GraphicsRestrictions::GR_FRAMEBUFFER_SRGB_WORKING))
             glEnable(GL_FRAMEBUFFER_SRGB);
+#endif
         glBindFramebuffer(GL_FRAMEBUFFER, 0);
     }
     PROFILER_POP_CPU_MARKER();
@@ -490,7 +494,9 @@ void ShaderBasedRenderer::renderScene(scene::ICameraSceneNode * const camnode,
     }
     if (!CVS->isDefferedEnabled() && !forceRTT)
     {
+#if !defined(USE_GLES2)
         glDisable(GL_FRAMEBUFFER_SRGB);
+#endif
         glDisable(GL_DEPTH_TEST);
         glDepthMask(GL_FALSE);
         return;
@@ -596,11 +602,15 @@ void ShaderBasedRenderer::renderPostProcessing(Camera * const camera)
     }
     else
     {
+#if !defined(USE_GLES2)
         glEnable(GL_FRAMEBUFFER_SRGB);
+#endif
         glBindFramebuffer(GL_FRAMEBUFFER, 0);
         camera->activate();
         m_post_processing->renderPassThrough(fbo->getRTT()[0], viewport.LowerRightCorner.X - viewport.UpperLeftCorner.X, viewport.LowerRightCorner.Y - viewport.UpperLeftCorner.Y);
+#if !defined(USE_GLES2)
         glDisable(GL_FRAMEBUFFER_SRGB);
+#endif
     }
 } //renderPostProcessing
 
@@ -800,8 +810,10 @@ void ShaderBasedRenderer::render(float dt)
         rg->preRenderCallback(camera);   // adjusts start referee
         irr_driver->getSceneManager()->setActiveCamera(camnode);
 
+#if !defined(USE_GLES2)
         if (!CVS->isDefferedEnabled())
             glEnable(GL_FRAMEBUFFER_SRGB);
+#endif
         
         PROFILER_PUSH_CPU_MARKER("UBO upload", 0x0, 0xFF, 0x0);
         computeMatrixesAndCameras(camnode, m_rtts->getWidth(), m_rtts->getHeight());