Geoff Lang | 496123f | 2014-02-12 11:33:51 -0500 | [diff] [blame] | 1 | #include "ANGLETest.h" |
| 2 | |
| 3 | class BlendMinMaxTest : public ANGLETest |
| 4 | { |
| 5 | protected: |
| 6 | BlendMinMaxTest() |
| 7 | { |
| 8 | setWindowWidth(128); |
| 9 | setWindowHeight(128); |
| 10 | setConfigRedBits(8); |
| 11 | setConfigGreenBits(8); |
| 12 | setConfigBlueBits(8); |
| 13 | setConfigAlphaBits(8); |
| 14 | setConfigDepthBits(24); |
| 15 | |
| 16 | mProgram = 0; |
| 17 | mColorLocation = -1; |
| 18 | } |
| 19 | |
| 20 | struct Color |
| 21 | { |
| 22 | float values[4]; |
| 23 | }; |
| 24 | |
| 25 | static GLubyte getExpected(bool blendMin, float curColor, GLubyte prevColor) |
| 26 | { |
| 27 | GLubyte curAsUbyte = (curColor * std::numeric_limits<GLubyte>::max()) + 0.5f; |
| 28 | return blendMin ? std::min<GLubyte>(curAsUbyte, prevColor) : std::max<GLubyte>(curAsUbyte, prevColor); |
| 29 | } |
| 30 | |
| 31 | void runTest() |
| 32 | { |
| 33 | const size_t colorCount = 1024; |
| 34 | Color colors[colorCount]; |
| 35 | for (size_t i = 0; i < colorCount; i++) |
| 36 | { |
| 37 | for (size_t j = 0; j < 4; j++) |
| 38 | { |
| 39 | colors[i].values[j] = (rand() % 255) / 255.0f; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | GLubyte prevColor[4]; |
| 44 | for (size_t i = 0; i < colorCount; i++) |
| 45 | { |
| 46 | const Color &color = colors[i]; |
| 47 | glUseProgram(mProgram); |
| 48 | glUniform4f(mColorLocation, color.values[0], color.values[1], color.values[2], color.values[3]); |
| 49 | |
| 50 | bool blendMin = (rand() % 2 == 0); |
| 51 | glBlendEquation(blendMin ? GL_MIN : GL_MAX); |
| 52 | |
| 53 | drawQuad(mProgram, "aPosition", 0.5f); |
| 54 | |
| 55 | if (i > 0) |
| 56 | { |
| 57 | EXPECT_PIXEL_EQ(0, 0, |
| 58 | getExpected(blendMin, color.values[0], prevColor[0]), |
| 59 | getExpected(blendMin, color.values[1], prevColor[1]), |
| 60 | getExpected(blendMin, color.values[2], prevColor[2]), |
| 61 | getExpected(blendMin, color.values[3], prevColor[3])); |
| 62 | } |
| 63 | |
| 64 | glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, prevColor); |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | virtual void SetUp() |
| 69 | { |
| 70 | ANGLETest::SetUp(); |
| 71 | |
| 72 | const std::string testVertexShaderSource = SHADER_SOURCE |
| 73 | ( |
| 74 | attribute highp vec4 aPosition; |
| 75 | |
| 76 | void main(void) |
| 77 | { |
| 78 | gl_Position = aPosition; |
| 79 | } |
| 80 | ); |
| 81 | |
| 82 | const std::string testFragmentShaderSource = SHADER_SOURCE |
| 83 | ( |
| 84 | uniform highp vec4 color; |
| 85 | void main(void) |
| 86 | { |
| 87 | gl_FragColor = color; |
| 88 | } |
| 89 | ); |
| 90 | |
| 91 | mProgram = compileProgram(testVertexShaderSource, testFragmentShaderSource); |
| 92 | if (mProgram == 0) |
| 93 | { |
| 94 | FAIL() << "shader compilation failed."; |
| 95 | } |
| 96 | |
| 97 | mColorLocation = glGetUniformLocation(mProgram, "color"); |
| 98 | |
| 99 | glUseProgram(mProgram); |
| 100 | |
| 101 | glClearColor(0, 0, 0, 0); |
| 102 | glClearDepthf(0.0); |
| 103 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 104 | |
| 105 | glEnable(GL_BLEND); |
| 106 | glDisable(GL_DEPTH_TEST); |
| 107 | } |
| 108 | |
| 109 | void SetUpFramebuffer(GLenum colorFormat) |
| 110 | { |
| 111 | glGenFramebuffers(1, &mFramebuffer); |
| 112 | glBindFramebuffer(GL_DRAW_FRAMEBUFFER, mFramebuffer); |
| 113 | glBindFramebuffer(GL_READ_FRAMEBUFFER, mFramebuffer); |
| 114 | |
| 115 | glGenRenderbuffers(1, &mColorRenderbuffer); |
| 116 | glBindRenderbuffer(GL_RENDERBUFFER, mColorRenderbuffer); |
| 117 | glRenderbufferStorage(GL_RENDERBUFFER, colorFormat, getWindowWidth(), getWindowHeight()); |
| 118 | glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, mColorRenderbuffer); |
| 119 | |
| 120 | ASSERT_GL_NO_ERROR(); |
| 121 | } |
| 122 | |
| 123 | virtual void TearDown() |
| 124 | { |
| 125 | glDeleteProgram(mProgram); |
| 126 | glDeleteFramebuffers(1, &mFramebuffer); |
| 127 | glDeleteRenderbuffers(1, &mColorRenderbuffer); |
| 128 | |
| 129 | ANGLETest::TearDown(); |
| 130 | } |
| 131 | |
| 132 | GLuint mProgram; |
| 133 | GLint mColorLocation; |
| 134 | |
| 135 | GLuint mFramebuffer; |
| 136 | GLuint mColorRenderbuffer; |
| 137 | }; |
| 138 | |
| 139 | TEST_F(BlendMinMaxTest, rgba8) |
| 140 | { |
| 141 | SetUpFramebuffer(GL_RGBA8); |
| 142 | runTest(); |
| 143 | } |
| 144 | |
| 145 | TEST_F(BlendMinMaxTest, rgba32f) |
| 146 | { |
| 147 | SetUpFramebuffer(GL_RGBA32F); |
| 148 | runTest(); |
| 149 | } |
| 150 | |
| 151 | TEST_F(BlendMinMaxTest, rgba16f) |
| 152 | { |
| 153 | SetUpFramebuffer(GL_RGBA16F); |
| 154 | runTest(); |
| 155 | } |