Implement support for rendering to 32-bit float textures on ES3

gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc

 // Copyright (c) 2012 The Chromium 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 "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
@@ skipping 8806 matching lines @@
   AddExpectationsForActiveTexture(GL_TEXTURE1);
   AddExpectationsForBindTexture(GL_TEXTURE_2D,
                                 TestHelper::kServiceDefaultTexture2dId);
 
   // Expect to restore active texture unit to GL_TEXTURE0.
   AddExpectationsForActiveTexture(GL_TEXTURE0);
 
   GetDecoder()->RestoreAllTextureUnitBindings(&prev_state);
 }
 
+TEST_F(GLES2DecoderManualInitTest, TexImage2DFloatOnGLES2) {
+  InitDecoder("GL_OES_texture_float",        // extensions
+              "opengl es 2.0",               // gl version
+              false,                         // has alpha
+              false,                         // has depth
+              false,                         // has stencil
+              false,                         // request alpha
+              false,                         // request depth
+              false,                         // request stencil
+              false);                        // bind generates resource
+  DoBindTexture(GL_TEXTURE_2D, client_texture_id_, kServiceTextureId);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 17, 0, GL_RGBA, GL_FLOAT, 0, 0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 16, 17, 0, GL_RGB, GL_FLOAT, 0, 0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 16, 17, 0, GL_LUMINANCE,
+               GL_FLOAT, 0, 0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 16, 17, 0, GL_ALPHA, GL_FLOAT,
+               0, 0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 16, 17, 0,
+               GL_LUMINANCE_ALPHA, GL_FLOAT, 0, 0);
+}
+
+TEST_F(GLES2DecoderManualInitTest, TexImage2DFloatOnGLES3) {
+  InitDecoder("GL_OES_texture_float GL_EXT_color_buffer_float", // extensions
+              "opengl es 3.0",               // gl version
+              false,                         // has alpha
+              false,                         // has depth
+              false,                         // has stencil
+              false,                         // request alpha
+              false,                         // request depth
+              false,                         // request stencil
+              false);                        // bind generates resource
+  DoBindTexture(GL_TEXTURE_2D, client_texture_id_, kServiceTextureId);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 17, 0, GL_RGBA, GL_FLOAT, 0, 0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 16, 17, 0, GL_RGB, GL_FLOAT, 0, 0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F, 16, 17, 0, GL_RGBA, GL_FLOAT, 0,
+               0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 16, 17, 0, GL_LUMINANCE,
+               GL_FLOAT, 0, 0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 16, 17, 0, GL_ALPHA, GL_FLOAT,
+               0, 0);
+  DoTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 16, 17, 0,
+               GL_LUMINANCE_ALPHA, GL_FLOAT, 0, 0);
+}
+
+TEST_F(GLES2DecoderManualInitTest, TexImage2DFloatConvertsFormatDesktop) {
+  InitDecoder("GL_ARB_texture_float",        // extensions
+              "2.1",                         // gl version
+              false,                         // has alpha
+              false,                         // has depth
+              false,                         // has stencil
+              false,                         // request alpha
+              false,                         // request depth
+              false,                         // request stencil
+              false);                        // bind generates resource
+  DoBindTexture(GL_TEXTURE_2D, client_texture_id_, kServiceTextureId);
+  DoTexImage2DConvertInternalFormat(GL_TEXTURE_2D, 0, GL_RGBA, 16, 17, 0,
+                                    GL_RGBA, GL_FLOAT, 0, 0, GL_RGBA32F_ARB);
+  DoTexImage2DConvertInternalFormat(GL_TEXTURE_2D, 0, GL_RGB, 16, 17, 0,
+                                    GL_RGB, GL_FLOAT, 0, 0, GL_RGB32F_ARB);
+  DoTexImage2DConvertInternalFormat(GL_TEXTURE_2D, 0, GL_LUMINANCE, 16, 17, 0,
+                                    GL_LUMINANCE, GL_FLOAT, 0, 0,
+                                    GL_LUMINANCE32F_ARB);
+  DoTexImage2DConvertInternalFormat(GL_TEXTURE_2D, 0, GL_ALPHA, 16, 17, 0,
+                                    GL_ALPHA, GL_FLOAT, 0, 0, GL_ALPHA32F_ARB);
+  DoTexImage2DConvertInternalFormat(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, 16,
+                                    17, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, 0, 0,
+                                    GL_LUMINANCE_ALPHA32F_ARB);
+}
+
+
 // TODO(gman): Complete this test.
 // TEST_F(GLES2DecoderTest, CompressedTexImage2DGLError) {
 // }
 
 // TODO(gman): BufferData
 
 // TODO(gman): BufferDataImmediate
 
 // TODO(gman): BufferSubData
 
@@ skipping 16 matching lines @@
 // TODO(gman): TexImage2DImmediate
 
 // TODO(gman): TexSubImage2DImmediate
 
 // TODO(gman): UseProgram
 
 // TODO(gman): SwapBuffers
 
 }  // namespace gles2
 }  // namespace gpu