Split tests into individual files. Got rid of globals by converting them to classes.

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
+#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;"
+"}";
+
+const char *vertex_shader_2_varying =
+"attribute vec4 c;"
+"varying vec4 v1;"
+"varying vec4 v2;"
+"void main() {"
+"  gl_Position = c;"
+   V1 "=" V2 "= c/2.;"
+"}";
+
+const char *vertex_shader_4_varying =
+"attribute vec4 c;"
+"varying vec4 v1;"
+"varying vec4 v2;"
+"varying vec4 v3;"
+"varying vec4 v4;"
+"void main() {"
+"  gl_Position = c;"
+   V1 "=" V2 "=" V3 "=" V4 "= c/4.;"
+"}";
+
+const char *vertex_shader_8_varying =
+"attribute vec4 c;"
+"varying vec4 v1;"
+"varying vec4 v2;"
+"varying vec4 v3;"
+"varying vec4 v4;"
+"varying vec4 v5;"
+"varying vec4 v6;"
+"varying vec4 v7;"
+"varying vec4 v8;"
+"void main() {"
+"  gl_Position = c;"
+   V1 "=" V2 "=" V3 "=" V4 "=" V5 "=" V6 "=" V7 "=" V8 "= c/8.;"
+"}";
+
+const char *fragment_shader_1_varying =
+"varying vec4 v1;"
+"void main() {"
+"  gl_FragColor =" V1 ";"
+"}";
+
+const char *fragment_shader_2_varying =
+"varying vec4 v1;"
+"varying vec4 v2;"
+"void main() {"
+"  gl_FragColor =" V1 "+" V2 ";"
+"}";
+
+const char *fragment_shader_4_varying =
+"varying vec4 v1;"
+"varying vec4 v2;"
+"varying vec4 v3;"
+"varying vec4 v4;"
+"void main() {"
+"  gl_FragColor =" V1 "+" V2 "+" V3 "+" V4 ";"
+"}";
+
+const char *fragment_shader_8_varying =
+"varying vec4 v1;"
+"varying vec4 v2;"
+"varying vec4 v3;"
+"varying vec4 v4;"
+"varying vec4 v5;"
+"varying vec4 v6;"
+"varying vec4 v7;"
+"varying vec4 v8;"
+"void main() {"
+"  gl_FragColor =" V1 "+" V2 "+" V3 "+" V4 "+" V5 "+" V6 "+" V7 "+" V8 ";"
+"}";
+
+GLuint VaryingsShaderProgram(int varyings_count, GLuint vertex_buffer) {
+  const char *vertex_shader = NULL;
+  const char *fragment_shader = NULL;
+  switch (varyings_count) {
+    case 1:
+      vertex_shader = vertex_shader_1_varying;
+      fragment_shader = fragment_shader_1_varying;
+      break;
+    case 2:
+      vertex_shader = vertex_shader_2_varying;
+      fragment_shader = fragment_shader_2_varying;
+      break;
+    case 4:
+      vertex_shader = vertex_shader_4_varying;
+      fragment_shader = fragment_shader_4_varying;
+      break;
+    case 8:
+      vertex_shader = vertex_shader_8_varying;
+      fragment_shader = fragment_shader_8_varying;
+      break;
+    default: return 0;
+  }
+  GLuint program =
+    InitShaderProgram(vertex_shader, fragment_shader);
+
+  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 =
+"varying vec4 v1;"
+"void main() {"
+"  gl_FragColor = vec4(" DDX "(" V1 ".x), 0., 0., 1.);"
+"}";
+
+const char *fragment_shader_ddy =
+"varying vec4 v1;"
+"void main() {"
+"  gl_FragColor = vec4(" DDY "(" 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);
+  glEnableVertexAttribArray(attribute_index);
+
+  return program;
+}
+
+
+bool VaryingsAndDdxyShaderTest::Run() {
+  glViewport(-g_width, -g_height, g_width*2, g_height*2);
+
+  const int c = 4;
+  GLfloat *vertices = NULL;
+  GLsizeiptr vertex_buffer_size = 0;
+  CreateLattice(&vertices, &vertex_buffer_size, 1.f / c, 1.f / c, c, c);
+  GLuint vertex_buffer = SetupVBO(GL_ARRAY_BUFFER,
+                                  vertex_buffer_size, vertices);
+
+  GLuint *indices = NULL;
+  GLuint index_buffer = 0;
+  GLsizeiptr index_buffer_size = 0;
+
+  count_ = CreateMesh(&indices, &index_buffer_size, c, c, 0);
+  index_buffer = SetupVBO(GL_ELEMENT_ARRAY_BUFFER,
+                          index_buffer_size, indices);
+
+  GLuint program = VaryingsShaderProgram(1, vertex_buffer);
+  RunTest(this,
+          "mpixels_sec_varyings_shader_1", g_width * g_height, true);
+  glDeleteProgram(program);
+
+  program = VaryingsShaderProgram(2, vertex_buffer);
+  RunTest(this,
+          "mpixels_sec_varyings_shader_2", g_width * g_height, true);
+  glDeleteProgram(program);
+
+  program = VaryingsShaderProgram(4, vertex_buffer);
+  RunTest(this,
+          "mpixels_sec_varyings_shader_4", g_width * g_height, true);
+  glDeleteProgram(program);
+
+  program = VaryingsShaderProgram(8, vertex_buffer);
+  RunTest(this,
+          "mpixels_sec_varyings_shader_8", g_width * g_height, true);
+  glDeleteProgram(program);
+
+  program = DdxDdyShaderProgram(true, vertex_buffer);
+  RunTest(this,
+          "mpixels_sec_ddx_shader", g_width * g_height, true);
+  glDeleteProgram(program);
+
+  program = DdxDdyShaderProgram(false, vertex_buffer);
+  RunTest(this,
+          "mpixels_sec_ddy_shader", g_width * g_height, true);
+  glDeleteProgram(program);
+
+  glDeleteBuffers(1, &index_buffer);
+  delete[] indices;
+
+  glDeleteBuffers(1, &vertex_buffer);
+  delete[] vertices;
+
+  return true;
+}
+
+
+TestBase* GetVaryingsAndDdxyShaderTest() {
+  return new VaryingsAndDdxyShaderTest;
+}
+
+
+} // namespace glbench