src/gpu/command_buffer/tests/gl_copy_texture_CHROMIUM_unittest.cc

   1 // Copyright (c) 2012 The Chromium 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 #ifndef GL_GLEXT_PROTOTYPES
   6 #define GL_GLEXT_PROTOTYPES
   7 #endif
   8
   9 #include <GLES2/gl2.h>
  10 #include <GLES2/gl2ext.h>
  11 #include <GLES2/gl2extchromium.h>
  12
  13 #include "gpu/command_buffer/tests/gl_manager.h"
  14 #include "gpu/command_buffer/tests/gl_test_utils.h"
  15 #include "testing/gmock/include/gmock/gmock.h"
  16 #include "testing/gtest/include/gtest/gtest.h"
  17
  18 namespace gpu {
  19
  20 // A collection of tests that exercise the GL_CHROMIUM_copy_texture extension.
  21 class GLCopyTextureCHROMIUMTest : public testing::Test {
  22  protected:
  23   virtual void SetUp() {
  24     gl_.Initialize(GLManager::Options());
  25
  26     glGenTextures(2, textures_);
  27     glBindTexture(GL_TEXTURE_2D, textures_[1]);
  28
  29     // Some drivers (NVidia/SGX) require texture settings to be a certain way or
  30     // they won't report FRAMEBUFFER_COMPLETE.
  31     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
  32     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
  33     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  34     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
  35
  36     glGenFramebuffers(1, &framebuffer_id_);
  37     glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_id_);
  38     glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
  39                            textures_[1], 0);
  40   }
  41
  42   virtual void TearDown() {
  43     glDeleteTextures(2, textures_);
  44     glDeleteFramebuffers(1, &framebuffer_id_);
  45     gl_.Destroy();
  46   }
  47
  48   GLManager gl_;
  49   GLuint textures_[2];
  50   GLuint framebuffer_id_;
  51 };
  52
  53 // Test to ensure that the basic functionality of the extension works.
  54 TEST_F(GLCopyTextureCHROMIUMTest, Basic) {
  55   uint8 pixels[1 * 4] = { 255u, 0u, 0u, 255u };
  56
  57   glBindTexture(GL_TEXTURE_2D, textures_[0]);
  58   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
  59                pixels);
  60
  61   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0, GL_RGBA,
  62                         GL_UNSIGNED_BYTE);
  63   EXPECT_TRUE(glGetError() == GL_NO_ERROR);
  64
  65   // Check the FB is still bound.
  66   GLint value = 0;
  67   glGetIntegerv(GL_FRAMEBUFFER_BINDING, &value);
  68   GLuint fb_id = value;
  69   EXPECT_EQ(framebuffer_id_, fb_id);
  70
  71   // Check that FB is complete.
  72   EXPECT_EQ(static_cast<GLenum>(GL_FRAMEBUFFER_COMPLETE),
  73             glCheckFramebufferStatus(GL_FRAMEBUFFER));
  74
  75   GLTestHelper::CheckPixels(0, 0, 1, 1, 0, pixels);
  76   EXPECT_TRUE(GL_NO_ERROR == glGetError());
  77 }
  78
  79 // Test that the extension respects the flip-y pixel storage setting.
  80 TEST_F(GLCopyTextureCHROMIUMTest, FlipY) {
  81   uint8 pixels[2][2][4];
  82   for (int x = 0; x < 2; ++x) {
  83     for (int y = 0; y < 2; ++y) {
  84       pixels[y][x][0] = x + y;
  85       pixels[y][x][1] = x + y;
  86       pixels[y][x][2] = x + y;
  87       pixels[y][x][3] = 255u;
  88     }
  89   }
  90
  91   glBindTexture(GL_TEXTURE_2D, textures_[0]);
  92   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
  93                pixels);
  94
  95   glPixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, GL_TRUE);
  96   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0, GL_RGBA,
  97                         GL_UNSIGNED_BYTE);
  98   EXPECT_TRUE(GL_NO_ERROR == glGetError());
  99
 100   uint8 copied_pixels[2][2][4] = {{{0}}};
 101   glReadPixels(0, 0, 2, 2, GL_RGBA, GL_UNSIGNED_BYTE, copied_pixels);
 102   for (int x = 0; x < 2; ++x) {
 103     for (int y = 0; y < 2; ++y)
 104       EXPECT_EQ(pixels[1-y][x][0], copied_pixels[y][x][0]);
 105   }
 106
 107   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 108 }
 109
 110 // Test that the extension respects the GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM
 111 // storage setting.
 112 TEST_F(GLCopyTextureCHROMIUMTest, PremultiplyAlpha) {
 113   uint8 pixels[1 * 4] = { 2, 2, 2, 128 };
 114
 115   glBindTexture(GL_TEXTURE_2D, textures_[0]);
 116   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 117                pixels);
 118
 119   glPixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM, GL_TRUE);
 120   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0, GL_RGBA,
 121                        GL_UNSIGNED_BYTE);
 122   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 123
 124   uint8 copied_pixels[1 * 4] = {0};
 125   glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, copied_pixels);
 126   EXPECT_EQ(1u, copied_pixels[0]);
 127   EXPECT_EQ(1u, copied_pixels[1]);
 128   EXPECT_EQ(1u, copied_pixels[2]);
 129   EXPECT_EQ(128u, copied_pixels[3]);
 130
 131   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 132 }
 133
 134 // Test that the extension respects the GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM
 135 // storage setting.
 136 TEST_F(GLCopyTextureCHROMIUMTest, UnpremultiplyAlpha) {
 137   uint8 pixels[1 * 4] = { 16, 16, 16, 128 };
 138
 139   glBindTexture(GL_TEXTURE_2D, textures_[0]);
 140   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 141                pixels);
 142
 143   glPixelStorei(GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, GL_TRUE);
 144   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0, GL_RGBA,
 145                         GL_UNSIGNED_BYTE);
 146   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 147
 148   uint8 copied_pixels[1 * 4] = {0};
 149   glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, copied_pixels);
 150   EXPECT_EQ(32u, copied_pixels[0]);
 151   EXPECT_EQ(32u, copied_pixels[1]);
 152   EXPECT_EQ(32u, copied_pixels[2]);
 153   EXPECT_EQ(128u, copied_pixels[3]);
 154
 155   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 156 }
 157
 158 TEST_F(GLCopyTextureCHROMIUMTest, FlipYAndPremultiplyAlpha) {
 159   uint8 pixels[2][2][4];
 160   for (int x = 0; x < 2; ++x) {
 161     for (int y = 0; y < 2; ++y) {
 162       uint8 color = 16 * x + 16 * y;
 163       pixels[y][x][0] = color;
 164       pixels[y][x][1] = color;
 165       pixels[y][x][2] = color;
 166       pixels[y][x][3] = 128u;
 167     }
 168   }
 169
 170   glBindTexture(GL_TEXTURE_2D, textures_[0]);
 171   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 172                pixels);
 173
 174   glPixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, GL_TRUE);
 175   glPixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM, GL_TRUE);
 176   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0, GL_RGBA,
 177                         GL_UNSIGNED_BYTE);
 178   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 179
 180   uint8 copied_pixels[2][2][4] = {{{0}}};
 181   glReadPixels(0, 0, 2, 2, GL_RGBA, GL_UNSIGNED_BYTE, copied_pixels);
 182   for (int x = 0; x < 2; ++x) {
 183     for (int y = 0; y < 2; ++y) {
 184       EXPECT_EQ(pixels[1-y][x][0] / 2, copied_pixels[y][x][0]);
 185       EXPECT_EQ(pixels[1-y][x][1] / 2, copied_pixels[y][x][1]);
 186       EXPECT_EQ(pixels[1-y][x][2] / 2, copied_pixels[y][x][2]);
 187       EXPECT_EQ(pixels[1-y][x][3], copied_pixels[y][x][3]);
 188     }
 189   }
 190
 191   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 192 }
 193
 194 TEST_F(GLCopyTextureCHROMIUMTest, FlipYAndUnpremultiplyAlpha) {
 195   uint8 pixels[2][2][4];
 196   for (int x = 0; x < 2; ++x) {
 197     for (int y = 0; y < 2; ++y) {
 198       uint8 color = 16 * x + 16 * y;
 199       pixels[y][x][0] = color;
 200       pixels[y][x][1] = color;
 201       pixels[y][x][2] = color;
 202       pixels[y][x][3] = 128u;
 203     }
 204   }
 205
 206   glBindTexture(GL_TEXTURE_2D, textures_[0]);
 207   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 2, 2, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 208                pixels);
 209
 210   glPixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, GL_TRUE);
 211   glPixelStorei(GL_UNPACK_UNPREMULTIPLY_ALPHA_CHROMIUM, GL_TRUE);
 212   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0, GL_RGBA,
 213                         GL_UNSIGNED_BYTE);
 214   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 215
 216   uint8 copied_pixels[2][2][4] = {{{0}}};
 217   glReadPixels(0, 0, 2, 2, GL_RGBA, GL_UNSIGNED_BYTE, copied_pixels);
 218   for (int x = 0; x < 2; ++x) {
 219     for (int y = 0; y < 2; ++y) {
 220       EXPECT_EQ(pixels[1-y][x][0] * 2, copied_pixels[y][x][0]);
 221       EXPECT_EQ(pixels[1-y][x][1] * 2, copied_pixels[y][x][1]);
 222       EXPECT_EQ(pixels[1-y][x][2] * 2, copied_pixels[y][x][2]);
 223       EXPECT_EQ(pixels[1-y][x][3], copied_pixels[y][x][3]);
 224     }
 225   }
 226
 227   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 228 }
 229
 230 namespace {
 231
 232 void glEnableDisable(GLint param, GLboolean value) {
 233   if (value)
 234     glEnable(param);
 235   else
 236     glDisable(param);
 237 }
 238
 239 }  // unnamed namespace
 240
 241 // Validate that some basic GL state is not touched upon execution of
 242 // the extension.
 243 TEST_F(GLCopyTextureCHROMIUMTest, BasicStatePreservation) {
 244   uint8 pixels[1 * 4] = { 255u, 0u, 0u, 255u };
 245
 246   glBindFramebuffer(GL_FRAMEBUFFER, 0);
 247
 248   glBindTexture(GL_TEXTURE_2D, textures_[0]);
 249   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 250                pixels);
 251
 252   GLboolean reference_settings[2] = { GL_TRUE, GL_FALSE };
 253   for (int x = 0; x < 2; ++x) {
 254     GLboolean setting = reference_settings[x];
 255     glEnableDisable(GL_DEPTH_TEST, setting);
 256     glEnableDisable(GL_SCISSOR_TEST, setting);
 257     glEnableDisable(GL_STENCIL_TEST, setting);
 258     glEnableDisable(GL_CULL_FACE, setting);
 259     glEnableDisable(GL_BLEND, setting);
 260     glColorMask(setting, setting, setting, setting);
 261     glDepthMask(setting);
 262
 263     glActiveTexture(GL_TEXTURE1 + x);
 264
 265     glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0,
 266                           GL_RGBA, GL_UNSIGNED_BYTE);
 267     EXPECT_TRUE(GL_NO_ERROR == glGetError());
 268
 269     EXPECT_EQ(setting, glIsEnabled(GL_DEPTH_TEST));
 270     EXPECT_EQ(setting, glIsEnabled(GL_SCISSOR_TEST));
 271     EXPECT_EQ(setting, glIsEnabled(GL_STENCIL_TEST));
 272     EXPECT_EQ(setting, glIsEnabled(GL_CULL_FACE));
 273     EXPECT_EQ(setting, glIsEnabled(GL_BLEND));
 274
 275     GLboolean bool_array[4] = { GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE };
 276     glGetBooleanv(GL_DEPTH_WRITEMASK, bool_array);
 277     EXPECT_EQ(setting, bool_array[0]);
 278
 279     bool_array[0] = GL_FALSE;
 280     glGetBooleanv(GL_COLOR_WRITEMASK, bool_array);
 281     EXPECT_EQ(setting, bool_array[0]);
 282     EXPECT_EQ(setting, bool_array[1]);
 283     EXPECT_EQ(setting, bool_array[2]);
 284     EXPECT_EQ(setting, bool_array[3]);
 285
 286     GLint active_texture = 0;
 287     glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
 288     EXPECT_EQ(GL_TEXTURE1 + x, active_texture);
 289   }
 290
 291   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 292 };
 293
 294 // Verify that invocation of the extension does not modify the bound
 295 // texture state.
 296 TEST_F(GLCopyTextureCHROMIUMTest, TextureStatePreserved) {
 297   // Setup the texture used for the extension invocation.
 298   uint8 pixels[1 * 4] = { 255u, 0u, 0u, 255u };
 299   glBindTexture(GL_TEXTURE_2D, textures_[0]);
 300   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 301                pixels);
 302
 303   GLuint texture_ids[2];
 304   glGenTextures(2, texture_ids);
 305
 306   glActiveTexture(GL_TEXTURE0);
 307   glBindTexture(GL_TEXTURE_2D, texture_ids[0]);
 308
 309   glActiveTexture(GL_TEXTURE1);
 310   glBindTexture(GL_TEXTURE_2D, texture_ids[1]);
 311
 312   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0,
 313                         GL_RGBA, GL_UNSIGNED_BYTE);
 314   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 315
 316   GLint active_texture = 0;
 317   glGetIntegerv(GL_ACTIVE_TEXTURE, &active_texture);
 318   EXPECT_EQ(GL_TEXTURE1, active_texture);
 319
 320   GLint bound_texture = 0;
 321   glGetIntegerv(GL_TEXTURE_BINDING_2D, &bound_texture);
 322   EXPECT_EQ(texture_ids[1], static_cast<GLuint>(bound_texture));
 323   glBindTexture(GL_TEXTURE_2D, 0);
 324
 325   bound_texture = 0;
 326   glActiveTexture(GL_TEXTURE0);
 327   glGetIntegerv(GL_TEXTURE_BINDING_2D, &bound_texture);
 328   EXPECT_EQ(texture_ids[0], static_cast<GLuint>(bound_texture));
 329   glBindTexture(GL_TEXTURE_2D, 0);
 330
 331   glDeleteTextures(2, texture_ids);
 332
 333   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 334 }
 335
 336 // Verify that invocation of the extension does not perturb the currently
 337 // bound FBO state.
 338 TEST_F(GLCopyTextureCHROMIUMTest, FBOStatePreserved) {
 339   // Setup the texture used for the extension invocation.
 340   uint8 pixels[1 * 4] = { 255u, 0u, 0u, 255u };
 341   glBindTexture(GL_TEXTURE_2D, textures_[0]);
 342   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 343                pixels);
 344
 345   GLuint texture_id;
 346   glGenTextures(1, &texture_id);
 347   glBindTexture(GL_TEXTURE_2D, texture_id);
 348   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 349                0);
 350
 351   GLuint renderbuffer_id;
 352   glGenRenderbuffers(1, &renderbuffer_id);
 353   glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer_id);
 354   glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, 1, 1);
 355
 356   GLuint framebuffer_id;
 357   glGenFramebuffers(1, &framebuffer_id);
 358   glBindFramebuffer(GL_FRAMEBUFFER, framebuffer_id);
 359   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
 360                          texture_id, 0);
 361   glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
 362                             GL_RENDERBUFFER, renderbuffer_id);
 363   EXPECT_TRUE(
 364       GL_FRAMEBUFFER_COMPLETE == glCheckFramebufferStatus(GL_FRAMEBUFFER));
 365
 366   // Test that we can write to the bound framebuffer
 367   uint8 expected_color[4] = { 255u, 255u, 0, 255u };
 368   glClearColor(1.0, 1.0, 0, 1.0);
 369   glClear(GL_COLOR_BUFFER_BIT);
 370   GLTestHelper::CheckPixels(0, 0, 1, 1, 0, expected_color);
 371
 372   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0,
 373                         GL_RGBA, GL_UNSIGNED_BYTE);
 374   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 375
 376   EXPECT_TRUE(glIsFramebuffer(framebuffer_id));
 377
 378   // Ensure that reading from the framebuffer produces correct pixels.
 379   GLTestHelper::CheckPixels(0, 0, 1, 1, 0, expected_color);
 380
 381   uint8 expected_color2[4] = { 255u, 0, 255u, 255u };
 382   glClearColor(1.0, 0, 1.0, 1.0);
 383   glClear(GL_COLOR_BUFFER_BIT);
 384   GLTestHelper::CheckPixels(0, 0, 1, 1, 0, expected_color2);
 385
 386   GLint bound_fbo = 0;
 387   glGetIntegerv(GL_FRAMEBUFFER_BINDING, &bound_fbo);
 388   EXPECT_EQ(framebuffer_id, static_cast<GLuint>(bound_fbo));
 389
 390   GLint fbo_params = 0;
 391   glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 392                                         GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE,
 393                                         &fbo_params);
 394   EXPECT_EQ(GL_TEXTURE, fbo_params);
 395
 396   fbo_params = 0;
 397   glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
 398                                         GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
 399                                         &fbo_params);
 400   EXPECT_EQ(texture_id, static_cast<GLuint>(fbo_params));
 401
 402   fbo_params = 0;
 403   glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
 404                                         GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE,
 405                                         &fbo_params);
 406   EXPECT_EQ(GL_RENDERBUFFER, fbo_params);
 407
 408   fbo_params = 0;
 409   glGetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
 410                                         GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
 411                                         &fbo_params);
 412   EXPECT_EQ(renderbuffer_id, static_cast<GLuint>(fbo_params));
 413
 414   glDeleteRenderbuffers(1, &renderbuffer_id);
 415   glDeleteTextures(1, &texture_id);
 416   glDeleteFramebuffers(1, &framebuffer_id);
 417
 418   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 419 }
 420
 421 TEST_F(GLCopyTextureCHROMIUMTest, ProgramStatePreservation) {
 422   // unbind the one created in setup.
 423   glBindFramebuffer(GL_FRAMEBUFFER, 0);
 424   glBindTexture(GL_TEXTURE_2D, 0);
 425
 426   GLManager gl2;
 427   GLManager::Options options;
 428   options.size = gfx::Size(16, 16);
 429   options.share_group_manager = &gl_;
 430   gl2.Initialize(options);
 431   gl_.MakeCurrent();
 432
 433   static const char* v_shader_str =
 434       "attribute vec4 g_Position;\n"
 435       "void main()\n"
 436       "{\n"
 437       "   gl_Position = g_Position;\n"
 438       "}\n";
 439   static const char* f_shader_str =
 440       "precision mediump float;\n"
 441       "void main()\n"
 442       "{\n"
 443       "  gl_FragColor = vec4(0,1,0,1);\n"
 444       "}\n";
 445
 446   GLuint program = GLTestHelper::LoadProgram(v_shader_str, f_shader_str);
 447   glUseProgram(program);
 448   GLuint position_loc = glGetAttribLocation(program, "g_Position");
 449   glFlush();
 450
 451   // Delete program from other context.
 452   gl2.MakeCurrent();
 453   glDeleteProgram(program);
 454   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 455   glFlush();
 456
 457   // Program should still be usable on this context.
 458   gl_.MakeCurrent();
 459
 460   GLTestHelper::SetupUnitQuad(position_loc);
 461
 462   // test using program before
 463   uint8 expected[] = { 0, 255, 0, 255, };
 464   uint8 zero[] = { 0, 0, 0, 0, };
 465   glClear(GL_COLOR_BUFFER_BIT);
 466   EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 1, 1, 0, zero));
 467   glDrawArrays(GL_TRIANGLES, 0, 6);
 468   EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 1, 1, 0, expected));
 469
 470   // Call copyTextureCHROMIUM
 471   uint8 pixels[1 * 4] = { 255u, 0u, 0u, 255u };
 472   glBindTexture(GL_TEXTURE_2D, textures_[0]);
 473   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE,
 474                pixels);
 475   glCopyTextureCHROMIUM(GL_TEXTURE_2D, textures_[0], textures_[1], 0, GL_RGBA,
 476                         GL_UNSIGNED_BYTE);
 477
 478   // test using program after
 479   glClear(GL_COLOR_BUFFER_BIT);
 480   EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 1, 1, 0, zero));
 481   glDrawArrays(GL_TRIANGLES, 0, 6);
 482   EXPECT_TRUE(GLTestHelper::CheckPixels(0, 0, 1, 1, 0, expected));
 483
 484   EXPECT_TRUE(GL_NO_ERROR == glGetError());
 485
 486   gl2.MakeCurrent();
 487   gl2.Destroy();
 488   gl_.MakeCurrent();
 489 }
 490
 491 }  // namespace gpu