1 //
2 // Copyright 2015 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6
7 #include "test_utils/ANGLETest.h"
8
9 using namespace angle;
10
11 class PBOExtensionTest : public ANGLETest
12 {
13 protected:
PBOExtensionTest()14 PBOExtensionTest()
15 {
16 setWindowWidth(32);
17 setWindowHeight(32);
18 setConfigRedBits(8);
19 setConfigGreenBits(8);
20 setConfigBlueBits(8);
21 setConfigAlphaBits(8);
22 }
23
SetUp()24 virtual void SetUp()
25 {
26 ANGLETest::SetUp();
27
28 if (extensionEnabled("NV_pixel_buffer_object"))
29 {
30 glGenBuffers(1, &mPBO);
31 glBindBuffer(GL_PIXEL_PACK_BUFFER, mPBO);
32 glBufferData(GL_PIXEL_PACK_BUFFER, 4 * getWindowWidth() * getWindowHeight(), NULL, GL_STATIC_DRAW);
33 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
34
35 const char *vertexShaderSrc = SHADER_SOURCE
36 (
37 attribute vec4 aTest;
38 attribute vec2 aPosition;
39 varying vec4 vTest;
40
41 void main()
42 {
43 vTest = aTest;
44 gl_Position = vec4(aPosition, 0.0, 1.0);
45 gl_PointSize = 1.0;
46 }
47 );
48
49 const char *fragmentShaderSrc = SHADER_SOURCE
50 (
51 precision mediump float;
52 varying vec4 vTest;
53
54 void main()
55 {
56 gl_FragColor = vTest;
57 }
58 );
59
60 mProgram = CompileProgram(vertexShaderSrc, fragmentShaderSrc);
61
62 glGenBuffers(1, &mPositionVBO);
63 glBindBuffer(GL_ARRAY_BUFFER, mPositionVBO);
64 glBufferData(GL_ARRAY_BUFFER, 128, NULL, GL_DYNAMIC_DRAW);
65 glBindBuffer(GL_ARRAY_BUFFER, 0);
66 }
67 ASSERT_GL_NO_ERROR();
68 }
69
TearDown()70 virtual void TearDown()
71 {
72 ANGLETest::TearDown();
73
74 glDeleteBuffers(1, &mPBO);
75 glDeleteProgram(mProgram);
76 }
77
78 GLuint mPBO;
79 GLuint mProgram;
80 GLuint mPositionVBO;
81 };
82
TEST_P(PBOExtensionTest,PBOWithOtherTarget)83 TEST_P(PBOExtensionTest, PBOWithOtherTarget)
84 {
85 if (extensionEnabled("NV_pixel_buffer_object"))
86 {
87 glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
88 glClear(GL_COLOR_BUFFER_BIT);
89 EXPECT_GL_NO_ERROR();
90
91 glBindBuffer(GL_PIXEL_PACK_BUFFER, mPBO);
92 glReadPixels(0, 0, 16, 16, GL_RGBA, GL_UNSIGNED_BYTE, 0);
93
94 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
95 glBindBuffer(GL_ARRAY_BUFFER, mPBO);
96
97 GLvoid *mappedPtr = glMapBufferRangeEXT(GL_ARRAY_BUFFER, 0, 32, GL_MAP_READ_BIT);
98 unsigned char *dataPtr = static_cast<unsigned char *>(mappedPtr);
99 EXPECT_GL_NO_ERROR();
100
101 EXPECT_EQ(255, dataPtr[0]);
102 EXPECT_EQ(0, dataPtr[1]);
103 EXPECT_EQ(0, dataPtr[2]);
104 EXPECT_EQ(255, dataPtr[3]);
105
106 glUnmapBufferOES(GL_ARRAY_BUFFER);
107 }
108 EXPECT_GL_NO_ERROR();
109 }
110
TEST_P(PBOExtensionTest,PBOWithExistingData)111 TEST_P(PBOExtensionTest, PBOWithExistingData)
112 {
113 if (extensionEnabled("NV_pixel_buffer_object"))
114 {
115 // Clear backbuffer to red
116 glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
117 glClear(GL_COLOR_BUFFER_BIT);
118 EXPECT_GL_NO_ERROR();
119
120 // Read 16x16 region from red backbuffer to PBO
121 glBindBuffer(GL_PIXEL_PACK_BUFFER, mPBO);
122 glReadPixels(0, 0, 16, 16, GL_RGBA, GL_UNSIGNED_BYTE, 0);
123
124 // Clear backbuffer to green
125 glClearColor(0.0f, 1.0f, 0.0f, 1.0f);
126 glClear(GL_COLOR_BUFFER_BIT);
127 EXPECT_GL_NO_ERROR();
128
129 // Read 16x16 region from green backbuffer to PBO at offset 16
130 glReadPixels(0, 0, 16, 16, GL_RGBA, GL_UNSIGNED_BYTE, reinterpret_cast<GLvoid*>(16));
131 GLvoid * mappedPtr = glMapBufferRangeEXT(GL_PIXEL_PACK_BUFFER, 0, 32, GL_MAP_READ_BIT);
132 unsigned char *dataPtr = static_cast<unsigned char *>(mappedPtr);
133 EXPECT_GL_NO_ERROR();
134
135 // Test pixel 0 is red (existing data)
136 EXPECT_EQ(255, dataPtr[0]);
137 EXPECT_EQ(0, dataPtr[1]);
138 EXPECT_EQ(0, dataPtr[2]);
139 EXPECT_EQ(255, dataPtr[3]);
140
141 // Test pixel 16 is green (new data)
142 EXPECT_EQ(0, dataPtr[16 * 4 + 0]);
143 EXPECT_EQ(255, dataPtr[16 * 4 + 1]);
144 EXPECT_EQ(0, dataPtr[16 * 4 + 2]);
145 EXPECT_EQ(255, dataPtr[16 * 4 + 3]);
146
147 glUnmapBufferOES(GL_PIXEL_PACK_BUFFER);
148 }
149 EXPECT_GL_NO_ERROR();
150 }
151
152 // Use this to select which configurations (e.g. which renderer, which GLES major version) these tests should be run against.
153 ANGLE_INSTANTIATE_TEST(PBOExtensionTest, ES2_D3D11(), ES3_D3D11(), ES3_OPENGL(), ES3_OPENGLES());
154