commit 4059a3894ef3a5419a1bdc091a17eab552cd9c67
author shannon.woods%transgaming.com@gtempaccount.com <shannon.woods%transgaming.com@gtempaccount.com@736b8ea6-26fd-11df-bfd4-992fa37f6226> Sat Apr 13 03:31:16 2013 +0000
committer shannon.woods%transgaming.com@gtempaccount.com <shannon.woods%transgaming.com@gtempaccount.com@736b8ea6-26fd-11df-bfd4-992fa37f6226> Sat Apr 13 03:31:16 2013 +0000
tree 2f91764e4e034ec8a50b242038049e4f5153b6e8
parent 00e3f0c7cdda2b28a7aa888cf73146908b8a0848

Add and implement glDrawBuffersEXT entry point to libGLESv2.

TRAC #22657

Signed-off-by: Nicolas Capens
Signed-off-by: Shannon Woods
Author: Jamie Madill

git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2079 736b8ea6-26fd-11df-bfd4-992fa37f6226

src/libGLESv2/renderer/Renderer11.cpp

diff --git a/src/libGLESv2/renderer/Renderer11.cpp b/src/libGLESv2/renderer/Renderer11.cpp
index a478389..cf7d607 100644
--- a/src/libGLESv2/renderer/Renderer11.cpp
+++ b/src/libGLESv2/renderer/Renderer11.cpp
@@ -825,8 +825,13 @@
 
     for (unsigned int colorAttachment = 0; colorAttachment < gl::IMPLEMENTATION_MAX_DRAW_BUFFERS; colorAttachment++)
     {
-        if (framebuffer->getColorbufferType(colorAttachment) != GL_NONE)
+        const GLenum drawBufferState = framebuffer->getDrawBufferState(colorAttachment);
+
+        if (framebuffer->getColorbufferType(colorAttachment) != GL_NONE && drawBufferState != GL_NONE)
         {
+            // the draw buffer must be either "none", "back" for the default buffer or the same index as this color (in order)
+            ASSERT(drawBufferState == GL_BACK || drawBufferState == (GL_COLOR_ATTACHMENT0_EXT + colorAttachment));
+
             gl::Renderbuffer *colorbuffer = framebuffer->getColorbuffer(colorAttachment);
 
             if (!colorbuffer)