Checks completeness of framebuffer before read operations.

src/libGLESv2/Context.cpp

@@ -1928,6 +1928,12 @@ void Context::applyTextures()
 void Context::readPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, void* pixels)
 {
     Framebuffer *framebuffer = getFramebuffer();
+
+    if (framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE)
+    {
+        return error(GL_INVALID_FRAMEBUFFER_OPERATION);
+    }
+
     IDirect3DSurface9 *renderTarget = framebuffer->getRenderTarget();
     IDirect3DDevice9 *device = getDevice();
 

src/libGLESv2/libGLESv2.cpp

@@ -848,7 +848,13 @@ void __stdcall glCopyTexImage2D(GLenum target, GLint level, GLenum internalforma
 
         if (context)
         {
-            gl::Renderbuffer *source = context->getFramebuffer()->getColorbuffer();
+            gl::Framebuffer *framebuffer = context->getFramebuffer();
+            if (framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE)
+            {
+                return error(GL_INVALID_FRAMEBUFFER_OPERATION);
+            }
+
+            gl::Renderbuffer *source = framebuffer->getColorbuffer();
 
             if (target == GL_TEXTURE_2D)
             {
@@ -916,7 +922,13 @@ void __stdcall glCopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GL
 
         if (context)
         {
-            gl::Renderbuffer *source = context->getFramebuffer()->getColorbuffer();
+            gl::Framebuffer *framebuffer = context->getFramebuffer();
+            if (framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE)
+            {
+                return error(GL_INVALID_FRAMEBUFFER_OPERATION);
+            }
+
+            gl::Renderbuffer *source = framebuffer->getColorbuffer();
 
             if (target == GL_TEXTURE_2D)
             {