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 <functional>
6
7 #include "arraysize.h"
8 #include "glinterfacetest.h"
9
10 namespace glbench {
11
12 namespace {
13
14 // Basic shader code.
15 const char* kVertexShader =
16 "attribute vec4 c;"
17 "void main() {"
18 " gl_Position = c;"
19 "}";
20
21 const char* kFragmentShader =
22 "uniform vec4 color;"
23 "void main() {"
24 " gl_FragColor = color;"
25 "}";
26
27 // Vertex arrays used to draw a diamond.
28 const GLfloat kVertices[] = {1.0, 0.0,
29 0.0, -1.0,
30 -1.0, 0.0,
31 0.0, 1.0};
32 const GLushort kIndices[] = {0, 1, 2,
33 0, 2, 3};
34
35 } // namespace
36
SetupGLRendering()37 void GLInterfaceTest::SetupGLRendering() {
38 vertex_buffer_object_ =
39 SetupVBO(GL_ARRAY_BUFFER, sizeof(kVertices), kVertices);
40
41 shader_program_ = InitShaderProgram(kVertexShader, kFragmentShader);
42 attribute_index_ = glGetAttribLocation(shader_program_, "c");
43 glVertexAttribPointer(attribute_index_, 2, GL_FLOAT, GL_FALSE, 0, NULL);
44 glEnableVertexAttribArray(attribute_index_);
45
46 GLint color_uniform = glGetUniformLocation(shader_program_, "color");
47
48 const GLfloat white[4] = {1.0f, 1.0f, 1.0f, 1.0f};
49 glUniform4fv(color_uniform, 1, white);
50
51 num_indices_ = arraysize(kIndices);
52 index_buffer_object_ =
53 SetupVBO(GL_ELEMENT_ARRAY_BUFFER, sizeof(kIndices), kIndices);
54 }
55
CleanupGLRendering()56 void GLInterfaceTest::CleanupGLRendering() {
57 glDisableVertexAttribArray(attribute_index_);
58 glDeleteProgram(shader_program_);
59 glDeleteBuffers(1, &index_buffer_object_);
60 glDeleteBuffers(1, &vertex_buffer_object_);
61 }
62
Run()63 bool GLInterfaceTest::Run() {
64 const std::string test_name_base = std::string(Name()) + "_";
65
66 // Run test without GL commands.
67 render_func_.Reset();
68 RunTest(this, (test_name_base + "nogl").c_str(), 1.0, g_width, g_height,
69 false);
70
71 // Run main test with simple GL commands.
72 SetupGLRendering();
73 render_func_.Set(std::bind(&GLInterfaceTest::RenderGLSimple, this));
74 RunTest(this, (test_name_base + "glsimple").c_str(), 1.0, g_width, g_height,
75 false);
76 CleanupGLRendering();
77
78 // TODO(sque): Run with complex GL commands. See crosbug.com/36746.
79 return true;
80 }
81
RenderGLSimple()82 void GLInterfaceTest::RenderGLSimple() {
83 glDrawElements(GL_TRIANGLES, num_indices_, GL_UNSIGNED_SHORT, 0);
84 }
85
86 } // namespace glbench
87