Fix setting texture unit in handleTextureCompleteness

Source/core/html/canvas/WebGLRenderingContextBase.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 4398 matching lines @@
 void WebGLRenderingContextBase::handleTextureCompleteness(const char* functionName, bool prepareToDraw)
 {
     // All calling functions check isContextLost, so a duplicate check is not needed here.
     bool resetActiveUnit = false;
     WebGLTexture::TextureExtensionFlag flag = static_cast<WebGLTexture::TextureExtensionFlag>((extensionEnabled(OESTextureFloatLinearName) ? WebGLTexture::TextureFloatLinearExtensionEnabled : 0)
         | (extensionEnabled(OESTextureHalfFloatLinearName) ? WebGLTexture::TextureHalfFloatLinearExtensionEnabled : 0));
     for (unsigned ii = 0; ii < m_onePlusMaxNonDefaultTextureUnit; ++ii) {
         if ((m_textureUnits[ii].m_texture2DBinding.get() && m_textureUnits[ii].m_texture2DBinding->needToUseBlackTexture(flag))
             || (m_textureUnits[ii].m_textureCubeMapBinding.get() && m_textureUnits[ii].m_textureCubeMapBinding->needToUseBlackTexture(flag))) {
             if (ii != m_activeTextureUnit) {
-                webContext()->activeTexture(ii);
+                webContext()->activeTexture(GL_TEXTURE0 + ii);
                 resetActiveUnit = true;
             } else if (resetActiveUnit) {
-                webContext()->activeTexture(ii);
+                webContext()->activeTexture(GL_TEXTURE0 + ii);
                 resetActiveUnit = false;
             }
             WebGLTexture* tex2D;
             WebGLTexture* texCubeMap;
             if (prepareToDraw) {
                 String msg(String("texture bound to texture unit ") + String::number(ii)
                     + " is not renderable. It maybe non-power-of-2 and have incompatible texture filtering or is not 'texture complete'."
                     + " Or the texture is Float or Half Float type with linear filtering while OES_float_linear or OES_half_float_linear extension is not enabled.");
                 emitGLWarning(functionName, msg.utf8().data());
                 tex2D = m_blackTexture2D.get();
                 texCubeMap = m_blackTextureCubeMap.get();
             } else {
                 tex2D = m_textureUnits[ii].m_texture2DBinding.get();
                 texCubeMap = m_textureUnits[ii].m_textureCubeMapBinding.get();
             }
             if (m_textureUnits[ii].m_texture2DBinding && m_textureUnits[ii].m_texture2DBinding->needToUseBlackTexture(flag))
                 webContext()->bindTexture(GL_TEXTURE_2D, objectOrZero(tex2D));
             if (m_textureUnits[ii].m_textureCubeMapBinding && m_textureUnits[ii].m_textureCubeMapBinding->needToUseBlackTexture(flag))
                 webContext()->bindTexture(GL_TEXTURE_CUBE_MAP, objectOrZero(texCubeMap));
         }
     }
     if (resetActiveUnit)
-        webContext()->activeTexture(m_activeTextureUnit);
+        webContext()->activeTexture(GL_TEXTURE0 + m_activeTextureUnit);
 }
 
 void WebGLRenderingContextBase::createFallbackBlackTextures1x1()
 {
     // All calling functions check isContextLost, so a duplicate check is not needed here.
     unsigned char black[] = {0, 0, 0, 255};
     m_blackTexture2D = createTexture();
     webContext()->bindTexture(GL_TEXTURE_2D, m_blackTexture2D->object());
     webContext()->texImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1,
         0, GL_RGBA, GL_UNSIGNED_BYTE, black);
@@ skipping 1263 matching lines @@
         if (m_textureUnits[i].m_texture2DBinding
             || m_textureUnits[i].m_textureCubeMapBinding) {
             m_onePlusMaxNonDefaultTextureUnit = i + 1;
             return;
         }
     }
     m_onePlusMaxNonDefaultTextureUnit = 0;
 }
 
 } // namespace WebCore