1 // Copyright (c) 2013 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 "base/bind.h"
6
7 #include "glinterfacetest.h"
8
9 namespace glbench {
10
11 namespace {
12
13 // Basic shader code.
14 const char* kVertexShader =
15 "attribute vec4 c;"
16 "void main() {"
17 " gl_Position = c;"
18 "}";
19
20 const char* kFragmentShader =
21 "uniform vec4 color;"
22 "void main() {"
23 " gl_FragColor = color;"
24 "}";
25
26 // Vertex arrays used to draw a diamond.
27 const GLfloat kVertices[] = { 1.0, 0.0,
28 0.0, -1.0,
29 -1.0, 0.0,
30 0.0, 1.0 };
31 const GLushort kIndices[] = { 0, 1, 2,
32 0, 2, 3 };
33
34 } // namespace
35
SetupGLRendering()36 void GLInterfaceTest::SetupGLRendering() {
37 vertex_buffer_object_ =
38 SetupVBO(GL_ARRAY_BUFFER, sizeof(kVertices), kVertices);
39
40 shader_program_ = InitShaderProgram(kVertexShader, kFragmentShader);
41 attribute_index_ = glGetAttribLocation(shader_program_, "c");
42 glVertexAttribPointer(attribute_index_, 2, GL_FLOAT, GL_FALSE, 0, NULL);
43 glEnableVertexAttribArray(attribute_index_);
44
45 GLint color_uniform = glGetUniformLocation(shader_program_, "color");
46
47 const GLfloat white[4] = {1.0f, 1.0f, 1.0f, 1.0f};
48 glUniform4fv(color_uniform, 1, white);
49
50 num_indices_ = arraysize(kIndices);
51 index_buffer_object_ =
52 SetupVBO(GL_ELEMENT_ARRAY_BUFFER, sizeof(kIndices), kIndices);
53 }
54
CleanupGLRendering()55 void GLInterfaceTest::CleanupGLRendering() {
56 glDisableVertexAttribArray(attribute_index_);
57 glDeleteProgram(shader_program_);
58 glDeleteBuffers(1, &index_buffer_object_);
59 glDeleteBuffers(1, &vertex_buffer_object_);
60 }
61
Run()62 bool GLInterfaceTest::Run() {
63 const std::string test_name_base = std::string(Name()) + "_";
64
65 // Run test without GL commands.
66 render_func_.Reset();
67 RunTest(this, (test_name_base + "nogl").c_str(), 1.0, g_width, g_height, false);
68
69 // Run main test with simple GL commands.
70 SetupGLRendering();
71 render_func_ = base::Bind(&GLInterfaceTest::RenderGLSimple,
72 base::Unretained(this));
73 RunTest(this, (test_name_base + "glsimple").c_str(), 1.0, g_width, g_height, false);
74 CleanupGLRendering();
75
76 // TODO(sque): Run with complex GL commands. See crosbug.com/36746.
77 return true;
78 }
79
RenderGLSimple()80 void GLInterfaceTest::RenderGLSimple() {
81 glDrawElements(GL_TRIANGLES, num_indices_, GL_UNSIGNED_SHORT, 0);
82 }
83
84 } // namespace glbench
85