Texturing support for RECTANGLE textures.

src/gpu/gl/GrGLCaps.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrGLCaps.h"
 
@@ skipping 202 matching lines @@
     if (ctxInfo.hasExtension("GL_OES_EGL_image_external")) {
         if (ctxInfo.glslGeneration() == k110_GrGLSLGeneration) {
             fExternalTextureSupport = true;
         } else if (ctxInfo.hasExtension("GL_OES_EGL_image_external_essl3") ||
                    ctxInfo.hasExtension("OES_EGL_image_external_essl3")) {
             // At least one driver has been found that has this extension without the "GL_" prefix.
             fExternalTextureSupport = true;
         }
     }
 
-    if ((kGL_GrGLStandard == standard && version >= GR_GL_VER(3, 2)) ||
+    if ((kGL_GrGLStandard == standard && version >= GR_GL_VER(3, 1)) ||
         ctxInfo.hasExtension("GL_ARB_texture_rectangle")) {
-        fRectangleTextureSupport = true;
+        // We also require textureSize() support for rectangle 2D samplers which was added in GLSL
+        // 1.40.
+        if (ctxInfo.glslGeneration() >= k140_GrGLSLGeneration) {
+            fRectangleTextureSupport = true;
+        }
     }
 
     if (kGL_GrGLStandard == standard) {
         if (version >= GR_GL_VER(3,3) || ctxInfo.hasExtension("GL_ARB_texture_swizzle")) {
             fTextureSwizzleSupport = true;
         }
     } else {
         if (version >= GR_GL_VER(3,0)) {
             fTextureSwizzleSupport = true;
         }
@@ skipping 1343 matching lines @@
         for (int j = 0; j < kExternalFormatUsageCnt; ++j) {
             SkASSERT(defaultEntry.fFormats.fExternalFormat[j] !=
                      fConfigTable[i].fFormats.fExternalFormat[j]);
         }
         SkASSERT(defaultEntry.fFormats.fExternalType != fConfigTable[i].fFormats.fExternalType);
     }
 #endif
 }
 
 void GrGLCaps::onApplyOptionsOverrides(const GrContextOptions& options) {}