1 //
2 // Copyright 2023 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 // PVRTCCompressedTextureTest.cpp: Sampling tests for PVRTC texture formats
8 // Invalid usage errors are covered by CompressedTextureFormatsTest.
9
10 #include "test_utils/ANGLETest.h"
11 #include "test_utils/gl_raii.h"
12
13 using namespace angle;
14
15 class PVRTCCompressedTextureTestES3 : public ANGLETest<>
16 {
17 static constexpr int kDim = 128;
18
19 protected:
PVRTCCompressedTextureTestES3()20 PVRTCCompressedTextureTestES3()
21 {
22 setWindowWidth(kDim);
23 setWindowHeight(kDim);
24 setConfigRedBits(8);
25 setConfigGreenBits(8);
26 setConfigBlueBits(8);
27 setConfigAlphaBits(8);
28 }
29
testSetUp()30 void testSetUp() override
31 {
32 // Prepare some filler data.
33 // The test only asserts that direct and PBO texture uploads produce
34 // identical results, so the decoded values do not matter here.
35 for (size_t i = 0; i < mTextureData.size(); ++i)
36 {
37 mTextureData[i] = static_cast<uint8_t>(i + i / 8 + i / 2048);
38 }
39 }
40
test(GLenum format,GLsizei dimension)41 void test(GLenum format, GLsizei dimension)
42 {
43 // Placeholder for the decoded color values from a directly uploaded texture.
44 std::array<GLColor, kDim * kDim> controlData;
45
46 GLsizei imageSize = 0;
47 switch (format)
48 {
49 case GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG:
50 case GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG:
51 case GL_COMPRESSED_SRGB_PVRTC_4BPPV1_EXT:
52 case GL_COMPRESSED_SRGB_ALPHA_PVRTC_4BPPV1_EXT:
53 imageSize = (std::max(dimension, 8) * std::max(dimension, 8) * 4 + 7) / 8;
54 break;
55 case GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG:
56 case GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG:
57 case GL_COMPRESSED_SRGB_PVRTC_2BPPV1_EXT:
58 case GL_COMPRESSED_SRGB_ALPHA_PVRTC_2BPPV1_EXT:
59 imageSize = (std::max(dimension, 16) * std::max(dimension, 8) * 2 + 7) / 8;
60 break;
61 }
62 ASSERT_GT(imageSize, 0);
63
64 // Directly upload compressed data and remember the decoded values.
65 {
66 GLTexture texture;
67 glBindTexture(GL_TEXTURE_2D, texture);
68 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
69 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
70 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
71 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
72
73 glCompressedTexImage2D(GL_TEXTURE_2D, 0, format, dimension, dimension, 0, imageSize,
74 mTextureData.data());
75 ASSERT_GL_NO_ERROR();
76
77 glClear(GL_COLOR_BUFFER_BIT);
78 drawQuad(mProgram, essl1_shaders::PositionAttrib(), 0.0f);
79 ASSERT_GL_NO_ERROR();
80
81 glReadPixels(0, 0, kDim, kDim, GL_RGBA, GL_UNSIGNED_BYTE, controlData.data());
82 ASSERT_GL_NO_ERROR();
83 }
84
85 // Upload the same compressed data using a PBO with different
86 // offsets and check that it is sampled correctly each time.
87 for (size_t offset = 0; offset <= 8; ++offset)
88 {
89 std::vector<GLubyte> bufferData(offset);
90 std::copy(mTextureData.begin(), mTextureData.end(), std::back_inserter(bufferData));
91 ASSERT_EQ(bufferData.size(), mTextureData.size() + offset);
92
93 GLBuffer buffer;
94 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, buffer);
95 glBufferData(GL_PIXEL_UNPACK_BUFFER, bufferData.size(), bufferData.data(),
96 GL_STATIC_READ);
97 ASSERT_GL_NO_ERROR();
98
99 GLTexture texture;
100 glBindTexture(GL_TEXTURE_2D, texture);
101 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
102 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
103 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
104 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
105
106 glCompressedTexImage2D(GL_TEXTURE_2D, 0, format, dimension, dimension, 0, imageSize,
107 reinterpret_cast<void *>(offset));
108 ASSERT_GL_NO_ERROR();
109
110 glClear(GL_COLOR_BUFFER_BIT);
111 drawQuad(mProgram, essl1_shaders::PositionAttrib(), 0.0f);
112 ASSERT_GL_NO_ERROR();
113
114 std::array<GLColor, kDim * kDim> readData;
115 glReadPixels(0, 0, kDim, kDim, GL_RGBA, GL_UNSIGNED_BYTE, readData.data());
116 ASSERT_GL_NO_ERROR();
117
118 // Check only one screen pixel for each texture pixel.
119 for (GLsizei x = 0; x < dimension; ++x)
120 {
121 for (GLsizei y = 0; y < dimension; ++y)
122 {
123 // Tested texture sizes are multiples of the window dimensions.
124 const size_t xScaled = x * kDim / dimension;
125 const size_t yScaled = y * kDim / dimension;
126 const size_t position = yScaled * kDim + xScaled;
127 EXPECT_EQ(readData[position], controlData[position])
128 << "(" << x << ", " << y << ")"
129 << " of " << dimension << "x" << dimension << " texture with PBO offset "
130 << offset;
131 }
132 }
133 }
134 }
135
run(GLenum format)136 void run(GLenum format)
137 {
138 mProgram.makeRaster(essl1_shaders::vs::Texture2D(), essl1_shaders::fs::Texture2D());
139 for (auto dimension : {1, 2, 4, 8, 16, 32, 64, 128})
140 {
141 test(format, dimension);
142 }
143 }
144
145 private:
146 std::array<GLubyte, 8192> mTextureData;
147 GLProgram mProgram;
148 };
149
150 // Test uploading texture data from a PBO to an RGB_PVRTC_4BPPV1 texture.
TEST_P(PVRTCCompressedTextureTestES3,RGB_PVRTC_4BPPV1)151 TEST_P(PVRTCCompressedTextureTestES3, RGB_PVRTC_4BPPV1)
152 {
153 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_IMG_texture_compression_pvrtc"));
154 run(GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG);
155 }
156
157 // Test uploading texture data from a PBO to an RGBA_PVRTC_4BPPV1 texture.
TEST_P(PVRTCCompressedTextureTestES3,RGBA_PVRTC_4BPPV1)158 TEST_P(PVRTCCompressedTextureTestES3, RGBA_PVRTC_4BPPV1)
159 {
160 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_IMG_texture_compression_pvrtc"));
161 run(GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG);
162 }
163
164 // Test uploading texture data from a PBO to an RGB_PVRTC_2BPPV1 texture.
TEST_P(PVRTCCompressedTextureTestES3,RGB_PVRTC_2BPPV1)165 TEST_P(PVRTCCompressedTextureTestES3, RGB_PVRTC_2BPPV1)
166 {
167 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_IMG_texture_compression_pvrtc"));
168 run(GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG);
169 }
170
171 // Test uploading texture data from a PBO to an RGBA_PVRTC_2BPPV1 texture.
TEST_P(PVRTCCompressedTextureTestES3,RGBA_PVRTC_2BPPV1)172 TEST_P(PVRTCCompressedTextureTestES3, RGBA_PVRTC_2BPPV1)
173 {
174 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_IMG_texture_compression_pvrtc"));
175 run(GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG);
176 }
177
178 // Test uploading texture data from a PBO to an SRGB_PVRTC_4BPPV1 texture.
TEST_P(PVRTCCompressedTextureTestES3,SRGB_PVRTC_4BPPV1)179 TEST_P(PVRTCCompressedTextureTestES3, SRGB_PVRTC_4BPPV1)
180 {
181 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_IMG_texture_compression_pvrtc"));
182 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_pvrtc_sRGB"));
183 run(GL_COMPRESSED_SRGB_PVRTC_4BPPV1_EXT);
184 }
185
186 // Test uploading texture data from a PBO to an SRGB_ALPHA_PVRTC_4BPPV1 texture.
TEST_P(PVRTCCompressedTextureTestES3,SRGB_ALPHA_PVRTC_4BPPV1)187 TEST_P(PVRTCCompressedTextureTestES3, SRGB_ALPHA_PVRTC_4BPPV1)
188 {
189 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_IMG_texture_compression_pvrtc"));
190 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_pvrtc_sRGB"));
191 run(GL_COMPRESSED_SRGB_ALPHA_PVRTC_4BPPV1_EXT);
192 }
193
194 // Test uploading texture data from a PBO to an SRGB_PVRTC_2BPPV1 texture.
TEST_P(PVRTCCompressedTextureTestES3,SRGB_PVRTC_2BPPV1)195 TEST_P(PVRTCCompressedTextureTestES3, SRGB_PVRTC_2BPPV1)
196 {
197 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_IMG_texture_compression_pvrtc"));
198 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_pvrtc_sRGB"));
199 run(GL_COMPRESSED_SRGB_PVRTC_2BPPV1_EXT);
200 }
201
202 // Test uploading texture data from a PBO to an SRGB_ALPHA_PVRTC_2BPPV1 texture.
TEST_P(PVRTCCompressedTextureTestES3,SRGB_ALPHA_PVRTC_2BPPV1)203 TEST_P(PVRTCCompressedTextureTestES3, SRGB_ALPHA_PVRTC_2BPPV1)
204 {
205 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_IMG_texture_compression_pvrtc"));
206 ANGLE_SKIP_TEST_IF(!IsGLExtensionEnabled("GL_EXT_pvrtc_sRGB"));
207 run(GL_COMPRESSED_SRGB_ALPHA_PVRTC_2BPPV1_EXT);
208 }
209
210 GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(PVRTCCompressedTextureTestES3);
211 ANGLE_INSTANTIATE_TEST_ES3(PVRTCCompressedTextureTestES3);
212