1 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "main.h" 6 #include "testbase.h" 7 #include "utils.h" 8 9 10 namespace glbench { 11 12 13 class VaryingsAndDdxyShaderTest : public DrawElementsTestFunc { 14 public: 15 VaryingsAndDdxyShaderTest() {} 16 virtual ~VaryingsAndDdxyShaderTest() {} 17 virtual bool Run(); 18 virtual const char* Name() const { return "varyings_ddx_shader"; } 19 virtual const char* Unit() const { return "mpixels_sec"; } 20 21 private: 22 DISALLOW_COPY_AND_ASSIGN(VaryingsAndDdxyShaderTest); 23 }; 24 25 const char *vertex_shader_1_varying = 26 "attribute vec4 c;" 27 "varying vec4 v1;" 28 "void main() {" 29 " gl_Position = c;" 30 " v1 = c;" 31 "}"; 32 33 const char *vertex_shader_2_varying = 34 "attribute vec4 c;" 35 "varying vec4 v1;" 36 "varying vec4 v2;" 37 "void main() {" 38 " gl_Position = c;" 39 " v1 = v2 = c/2.;" 40 "}"; 41 42 const char *vertex_shader_4_varying = 43 "attribute vec4 c;" 44 "varying vec4 v1;" 45 "varying vec4 v2;" 46 "varying vec4 v3;" 47 "varying vec4 v4;" 48 "void main() {" 49 " gl_Position = c;" 50 " v1 = v2 = v3 = v4 = c/4.;" 51 "}"; 52 53 const char *vertex_shader_8_varying = 54 "attribute vec4 c;" 55 "varying vec4 v1;" 56 "varying vec4 v2;" 57 "varying vec4 v3;" 58 "varying vec4 v4;" 59 "varying vec4 v5;" 60 "varying vec4 v6;" 61 "varying vec4 v7;" 62 "varying vec4 v8;" 63 "void main() {" 64 " gl_Position = c;" 65 " v1 = v2 = v3 = v4 = v5 = v6 = v7 = v8 = c/8.;" 66 "}"; 67 68 const char *fragment_shader_1_varying = 69 "varying vec4 v1;" 70 "void main() {" 71 " gl_FragColor = v1;" 72 "}"; 73 74 const char *fragment_shader_2_varying = 75 "varying vec4 v1;" 76 "varying vec4 v2;" 77 "void main() {" 78 " gl_FragColor = v1 + v2;" 79 "}"; 80 81 const char *fragment_shader_4_varying = 82 "varying vec4 v1;" 83 "varying vec4 v2;" 84 "varying vec4 v3;" 85 "varying vec4 v4;" 86 "void main() {" 87 " gl_FragColor = v1 + v2 + v3 + v4;" 88 "}"; 89 90 const char *fragment_shader_8_varying = 91 "varying vec4 v1;" 92 "varying vec4 v2;" 93 "varying vec4 v3;" 94 "varying vec4 v4;" 95 "varying vec4 v5;" 96 "varying vec4 v6;" 97 "varying vec4 v7;" 98 "varying vec4 v8;" 99 "void main() {" 100 " gl_FragColor = v1 + v2 + v3 + v4 + v5 + v6 + v7 + v8;" 101 "}"; 102 103 GLuint VaryingsShaderProgram(int varyings_count, GLuint vertex_buffer) { 104 const char *vertex_shader = NULL; 105 const char *fragment_shader = NULL; 106 switch (varyings_count) { 107 case 1: 108 vertex_shader = vertex_shader_1_varying; 109 fragment_shader = fragment_shader_1_varying; 110 break; 111 case 2: 112 vertex_shader = vertex_shader_2_varying; 113 fragment_shader = fragment_shader_2_varying; 114 break; 115 case 4: 116 vertex_shader = vertex_shader_4_varying; 117 fragment_shader = fragment_shader_4_varying; 118 break; 119 case 8: 120 vertex_shader = vertex_shader_8_varying; 121 fragment_shader = fragment_shader_8_varying; 122 break; 123 default: return 0; 124 } 125 GLuint program = 126 InitShaderProgram(vertex_shader, fragment_shader); 127 128 int attribute_index = glGetAttribLocation(program, "c"); 129 glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer); 130 glVertexAttribPointer(attribute_index, 2, GL_FLOAT, GL_FALSE, 0, NULL); 131 glEnableVertexAttribArray(attribute_index); 132 133 return program; 134 } 135 136 137 const char *fragment_shader_ddx = 138 "#extension GL_OES_standard_derivatives : enable\n" 139 "varying vec4 v1;" 140 "void main() {" 141 " gl_FragColor = vec4(dFdx(v1.x), 0., 0., 1.);" 142 "}"; 143 144 const char *fragment_shader_ddy = 145 "#extension GL_OES_standard_derivatives : enable\n" 146 "varying vec4 v1;" 147 "void main() {" 148 " gl_FragColor = vec4(dFdy(v1.y), 0., 0., 1.);" 149 "}"; 150 151 GLuint DdxDdyShaderProgram(bool ddx, GLuint vertex_buffer) { 152 GLuint program = 153 InitShaderProgram(vertex_shader_1_varying, 154 ddx ? fragment_shader_ddx : fragment_shader_ddy); 155 156 int attribute_index = glGetAttribLocation(program, "c"); 157 glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer); 158 glVertexAttribPointer(attribute_index, 2, GL_FLOAT, GL_FALSE, 0, NULL); 159 glEnableVertexAttribArray(attribute_index); 160 161 return program; 162 } 163 164 165 bool VaryingsAndDdxyShaderTest::Run() { 166 glViewport(0, 0, g_width, g_height); 167 168 const int c = 4; 169 GLfloat *vertices = NULL; 170 GLsizeiptr vertex_buffer_size = 0; 171 CreateLattice(&vertices, &vertex_buffer_size, 1.f / c, 1.f / c, c, c); 172 GLuint vertex_buffer = SetupVBO(GL_ARRAY_BUFFER, 173 vertex_buffer_size, vertices); 174 175 GLushort *indices = NULL; 176 GLuint index_buffer = 0; 177 GLsizeiptr index_buffer_size = 0; 178 179 count_ = CreateMesh(&indices, &index_buffer_size, c, c, 0); 180 index_buffer = SetupVBO(GL_ELEMENT_ARRAY_BUFFER, 181 index_buffer_size, indices); 182 183 GLuint program = VaryingsShaderProgram(1, vertex_buffer); 184 RunTest(this, 185 "varyings_shader_1", g_width * g_height, g_width, g_height, true); 186 glDeleteProgram(program); 187 188 program = VaryingsShaderProgram(2, vertex_buffer); 189 RunTest(this, 190 "varyings_shader_2", g_width * g_height, g_width, g_height, true); 191 glDeleteProgram(program); 192 193 program = VaryingsShaderProgram(4, vertex_buffer); 194 RunTest(this, 195 "varyings_shader_4", g_width * g_height, g_width, g_height, true); 196 glDeleteProgram(program); 197 198 program = VaryingsShaderProgram(8, vertex_buffer); 199 RunTest(this, 200 "varyings_shader_8", g_width * g_height, g_width, g_height, true); 201 glDeleteProgram(program); 202 203 #if !defined(DISABLE_SOME_TESTS_FOR_INTEL_DRIVER) 204 program = DdxDdyShaderProgram(true, vertex_buffer); 205 RunTest(this, "ddx_shader", g_width * g_height, g_width, g_height, true); 206 glDeleteProgram(program); 207 208 program = DdxDdyShaderProgram(false, vertex_buffer); 209 RunTest(this, "ddy_shader", g_width * g_height, g_width, g_height, true); 210 glDeleteProgram(program); 211 #endif 212 213 glDeleteBuffers(1, &index_buffer); 214 delete[] indices; 215 216 glDeleteBuffers(1, &vertex_buffer); 217 delete[] vertices; 218 219 return true; 220 } 221 222 223 TestBase* GetVaryingsAndDdxyShaderTest() { 224 return new VaryingsAndDdxyShaderTest; 225 } 226 227 228 } // namespace glbench 229
