Fixes for GLES systems.

client/deps/glbench/src/varyingsandddxytest.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "main.h"
 #include "testbase.h"
 #include "utils.h"
 
 
 namespace glbench {
 
 
 class VaryingsAndDdxyShaderTest : public DrawElementsTestFunc {
  public:
   VaryingsAndDdxyShaderTest() {}
   virtual ~VaryingsAndDdxyShaderTest() {}
   virtual bool Run();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(VaryingsAndDdxyShaderTest);
 };
 
-#if I915_WORKAROUND
+#if defined(I915_WORKAROUND)
 #define V1 "gl_TexCoord[0]"
 #define V2 "gl_TexCoord[1]"
 #define V3 "gl_TexCoord[2]"
 #define V4 "gl_TexCoord[3]"
 #define V5 "gl_TexCoord[4]"
 #define V6 "gl_TexCoord[5]"
 #define V7 "gl_TexCoord[6]"
 #define V8 "gl_TexCoord[7]"
-#define DDX "dFdx"
-#define DDY "dFdy"
 #else
 #define V1 "v1"
 #define V2 "v2"
 #define V3 "v3"
 #define V4 "v4"
 #define V5 "v5"
 #define V6 "v6"
 #define V7 "v7"
 #define V8 "v8"
-#define DDX "ddx"
-#define DDY "ddy"
 #endif
 
 
 const char *vertex_shader_1_varying =
 "attribute vec4 c;"
 "varying vec4 v1;"
 "void main() {"
 "  gl_Position = c;"
    V1 "= c;"
 "}";
@@ skipping 96 matching lines @@
   int attribute_index = glGetAttribLocation(program, "c");
   glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
   glVertexAttribPointer(attribute_index, 2, GL_FLOAT, GL_FALSE, 0, NULL);
   glEnableVertexAttribArray(attribute_index);
 
   return program;
 }
 
 
 const char *fragment_shader_ddx =
+"#extension GL_OES_standard_derivatives : enable\n"
 "varying vec4 v1;"
 "void main() {"
-"  gl_FragColor = vec4(" DDX "(" V1 ".x), 0., 0., 1.);"
+"  gl_FragColor = vec4(dFdx(" V1 ".x), 0., 0., 1.);"
 "}";
 
 const char *fragment_shader_ddy =
+"#extension GL_OES_standard_derivatives : enable\n"
 "varying vec4 v1;"
 "void main() {"
-"  gl_FragColor = vec4(" DDY "(" V1 ".y), 0., 0., 1.);"
+"  gl_FragColor = vec4(dFdy(" V1 ".y), 0., 0., 1.);"
 "}";
 
 GLuint DdxDdyShaderProgram(bool ddx, GLuint vertex_buffer) {
   GLuint program =
     InitShaderProgram(vertex_shader_1_varying,
                       ddx ? fragment_shader_ddx : fragment_shader_ddy);
 
   int attribute_index = glGetAttribLocation(program, "c");
   glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
   glVertexAttribPointer(attribute_index, 2, GL_FLOAT, GL_FALSE, 0, NULL);
@@ skipping 60 matching lines @@
   return true;
 }
 
 
 TestBase* GetVaryingsAndDdxyShaderTest() {
   return new VaryingsAndDdxyShaderTest;
 }
 
 
 } // namespace glbench