1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <EGL/egl.h>
18 #include <EGL/eglext.h>
19 #include <GLES2/gl2.h>
20 #include <GLES2/gl2ext.h>
21 #include <jni.h>
22 #include <stdlib.h>
23 #include <android/hardware_buffer.h>
24 #include <android/log.h>
25 #include <cmath>
26 #include <string>
27 #include <sstream>
28
29 #define LOG_TAG "VrExtensionsJni"
30 #define LOGV(...) __android_log_print(ANDROID_LOG_VERBOSE,LOG_TAG,__VA_ARGS__)
31
32 using PFNEGLGETNATIVECLIENTBUFFERANDROID =
33 EGLClientBuffer(EGLAPIENTRYP)(const AHardwareBuffer* buffer);
34
35 using PFNGLEGLIMAGETARGETTEXTURE2DOESPROC = void(GL_APIENTRYP)(GLenum target,
36 void* image);
37
38 using PFNGLBUFFERSTORAGEEXTERNALEXTPROC =
39 void(GL_APIENTRYP)(GLenum target, GLintptr offset, GLsizeiptr size,
40 void* clientBuffer, GLbitfield flags);
41
42 using PFNGLMAPBUFFERRANGEPROC = void*(GL_APIENTRYP)(GLenum target,
43 GLintptr offset,
44 GLsizeiptr length,
45 GLbitfield access);
46
47 using PFNGLUNMAPBUFFERPROC = void*(GL_APIENTRYP)(GLenum target);
48
49 PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES;
50 PFNEGLGETNATIVECLIENTBUFFERANDROID eglGetNativeClientBufferANDROID;
51 PFNEGLCREATEIMAGEKHRPROC eglCreateImageKHR;
52 PFNGLFRAMEBUFFERTEXTUREMULTIVIEWOVRPROC glFramebufferTextureMultiviewOVR;
53 PFNGLFRAMEBUFFERTEXTUREMULTISAMPLEMULTIVIEWOVRPROC
54 glFramebufferTextureMultisampleMultiviewOVR;
55 PFNGLBUFFERSTORAGEEXTERNALEXTPROC glBufferStorageExternalEXT;
56 PFNGLMAPBUFFERRANGEPROC glMapBufferRange;
57 PFNGLUNMAPBUFFERPROC glUnmapBuffer;
58
59 #define NO_ERROR 0
60 #define GL_UNIFORM_BUFFER 0x8A11
61
62 // Declare flags that are added to MapBufferRange via EXT_buffer_storage.
63 // https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_buffer_storage.txt
64 #define GL_MAP_PERSISTENT_BIT_EXT 0x0040
65 #define GL_MAP_COHERENT_BIT_EXT 0x0080
66
67 // Declare tokens added as a part of EGL_EXT_image_gl_colorspace.
68 #define EGL_GL_COLORSPACE_DEFAULT_EXT 0x314D
69
70 #define LOAD_PROC(NAME, TYPE) \
71 NAME = reinterpret_cast<TYPE>(eglGetProcAddress(# NAME))
72
73 #define ASSERT(condition, format, args...) \
74 if (!(condition)) { \
75 fail(env, format, ## args); \
76 return; \
77 }
78
79 #define ASSERT_TRUE(a) \
80 ASSERT((a), "assert failed on (" #a ") at " __FILE__ ":%d", __LINE__)
81 #define ASSERT_FALSE(a) \
82 ASSERT(!(a), "assert failed on (!" #a ") at " __FILE__ ":%d", __LINE__)
83 #define ASSERT_EQ(a, b) \
84 ASSERT((a) == (b), "assert failed on (" #a ") at " __FILE__ ":%d", __LINE__)
85 #define ASSERT_NE(a, b) \
86 ASSERT((a) != (b), "assert failed on (" #a ") at " __FILE__ ":%d", __LINE__)
87 #define ASSERT_GT(a, b) \
88 ASSERT((a) > (b), "assert failed on (" #a ") at " __FILE__ ":%d", __LINE__)
89 #define ASSERT_NEAR_RGBA(a, b, delta) \
90 ASSERT(areNearRgba(a, b, delta), \
91 "assert failed on (" #a ") at " __FILE__ ":%d", __LINE__)
92
areNearRgba(int32_t actual,int32_t expected,int delta)93 bool areNearRgba(int32_t actual, int32_t expected, int delta) {
94 for (int shift = 0; shift < 32; shift += 8) {
95 if (std::abs((actual >> shift & 0xFF) - (expected >> shift & 0xFF)) > delta) {
96 return false;
97 }
98 }
99 return true;
100 }
101
fail(JNIEnv * env,const char * format,...)102 void fail(JNIEnv* env, const char* format, ...) {
103 va_list args;
104 va_start(args, format);
105 char* msg;
106 vasprintf(&msg, format, args);
107 va_end(args);
108 jclass exClass;
109 exClass = env->FindClass("java/lang/AssertionError");
110 jmethodID constructor =
111 env->GetMethodID(exClass, "<init>",
112 "(Ljava/lang/String;Ljava/lang/Throwable;)V");
113 jstring msgStr = env->NewStringUTF(msg);
114 jobject exception = env->NewObject(exClass, constructor, msgStr, nullptr);
115 env->Throw(static_cast<jthrowable>(exception));
116 free(msg);
117 }
118
testEglImageArray(JNIEnv * env,AHardwareBuffer_Desc desc,int nsamples)119 static void testEglImageArray(JNIEnv* env, AHardwareBuffer_Desc desc,
120 int nsamples) {
121 ASSERT_GT(desc.layers, 1);
122 AHardwareBuffer* hwbuffer = nullptr;
123 // If the format is unsupported and allocation fails, skip the test.
124 if (AHardwareBuffer_allocate(&desc, &hwbuffer) != NO_ERROR) return;
125 // Create EGLClientBuffer from the AHardwareBuffer.
126 EGLClientBuffer native_buffer = eglGetNativeClientBufferANDROID(hwbuffer);
127 ASSERT_TRUE(native_buffer);
128 // Create EGLImage from EGLClientBuffer.
129 EGLint attrs[] = {EGL_NONE};
130 EGLImageKHR image =
131 eglCreateImageKHR(eglGetCurrentDisplay(), EGL_NO_CONTEXT,
132 EGL_NATIVE_BUFFER_ANDROID, native_buffer, attrs);
133 ASSERT_TRUE(image);
134 // Create OpenGL texture from the EGLImage.
135 GLuint texid;
136 glGenTextures(1, &texid);
137 glBindTexture(GL_TEXTURE_2D_ARRAY, texid);
138 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D_ARRAY, image);
139 ASSERT_EQ(glGetError(), GL_NO_ERROR);
140 // Create FBO and add multiview attachment.
141 GLuint fboid;
142 glGenFramebuffers(1, &fboid);
143 glBindFramebuffer(GL_FRAMEBUFFER, fboid);
144 const GLint miplevel = 0;
145 const GLint base_view = 0;
146 const GLint num_views = desc.layers;
147 if (nsamples == 1) {
148 glFramebufferTextureMultiviewOVR(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
149 texid, miplevel, base_view, num_views);
150 } else {
151 glFramebufferTextureMultisampleMultiviewOVR(
152 GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, texid, miplevel, nsamples,
153 base_view, num_views);
154 }
155 ASSERT_EQ(glGetError(), GL_NO_ERROR);
156 ASSERT_EQ(glCheckFramebufferStatus(GL_FRAMEBUFFER),
157 GL_FRAMEBUFFER_COMPLETE);
158 // Release memory.
159 glDeleteTextures(1, &texid);
160 glDeleteFramebuffers(1, &fboid);
161 AHardwareBuffer_release(hwbuffer);
162 }
163
164 extern "C" JNIEXPORT void JNICALL
Java_android_vr_cts_VrExtensionBehaviorTest_nativeTestEglImageArray(JNIEnv * env,jclass)165 Java_android_vr_cts_VrExtensionBehaviorTest_nativeTestEglImageArray(
166 JNIEnv* env, jclass /* unused */) {
167 // First, load entry points provided by extensions.
168 LOAD_PROC(glEGLImageTargetTexture2DOES,
169 PFNGLEGLIMAGETARGETTEXTURE2DOESPROC);
170 ASSERT_NE(glEGLImageTargetTexture2DOES, nullptr);
171 LOAD_PROC(eglGetNativeClientBufferANDROID,
172 PFNEGLGETNATIVECLIENTBUFFERANDROID);
173 ASSERT_NE(eglGetNativeClientBufferANDROID, nullptr);
174 LOAD_PROC(eglCreateImageKHR, PFNEGLCREATEIMAGEKHRPROC);
175 ASSERT_NE(eglCreateImageKHR, nullptr);
176 LOAD_PROC(glFramebufferTextureMultiviewOVR,
177 PFNGLFRAMEBUFFERTEXTUREMULTIVIEWOVRPROC);
178 ASSERT_NE(glFramebufferTextureMultiviewOVR, nullptr);
179 LOAD_PROC(glFramebufferTextureMultisampleMultiviewOVR,
180 PFNGLFRAMEBUFFERTEXTUREMULTISAMPLEMULTIVIEWOVRPROC);
181 ASSERT_NE(glFramebufferTextureMultisampleMultiviewOVR, nullptr);
182 // Try creating a 32x32 AHardwareBuffer and attaching it to a multiview
183 // framebuffer, with various formats and depths.
184 AHardwareBuffer_Desc desc = {};
185 desc.width = 32;
186 desc.height = 32;
187 desc.usage = AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE |
188 AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT;
189 const int layers[] = {2, 4};
190 const int formats[] = {
191 AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM,
192 AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM,
193 AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM,
194 AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT,
195 // Do not test AHARDWAREBUFFER_FORMAT_BLOB, it isn't color-renderable.
196 };
197 const int samples[] = {1, 2, 4};
198 for (int nsamples : samples) {
199 for (auto nlayers : layers) {
200 for (auto format : formats) {
201 desc.layers = nlayers;
202 desc.format = format;
203 testEglImageArray(env, desc, nsamples);
204 }
205 }
206 }
207 }
208
testExternalBuffer(JNIEnv * env,uint64_t usage,bool write_hwbuffer,const std::string & test_string)209 static void testExternalBuffer(JNIEnv* env, uint64_t usage, bool write_hwbuffer,
210 const std::string& test_string) {
211 // Create a blob AHardwareBuffer suitable for holding the string.
212 AHardwareBuffer_Desc desc = {};
213 desc.width = test_string.size();
214 desc.height = 1;
215 desc.layers = 1;
216 desc.format = AHARDWAREBUFFER_FORMAT_BLOB;
217 desc.usage = usage;
218 AHardwareBuffer* hwbuffer = nullptr;
219 int error = AHardwareBuffer_allocate(&desc, &hwbuffer);
220 ASSERT_EQ(error, NO_ERROR);
221 // Create EGLClientBuffer from the AHardwareBuffer.
222 EGLClientBuffer native_buffer = eglGetNativeClientBufferANDROID(hwbuffer);
223 ASSERT_TRUE(native_buffer);
224 // Create uniform buffer from EGLClientBuffer.
225 const GLbitfield flags = GL_MAP_READ_BIT | GL_MAP_WRITE_BIT |
226 GL_MAP_COHERENT_BIT_EXT | GL_MAP_PERSISTENT_BIT_EXT;
227 GLuint buf = 0;
228 glGenBuffers(1, &buf);
229 glBindBuffer(GL_UNIFORM_BUFFER, buf);
230 ASSERT_EQ(glGetError(), GL_NO_ERROR);
231 const GLsizeiptr bufsize = desc.width * desc.height;
232 glBufferStorageExternalEXT(GL_UNIFORM_BUFFER, 0,
233 bufsize, native_buffer, flags);
234 ASSERT_EQ(glGetError(), GL_NO_ERROR);
235 // Obtain a writeable pointer using either OpenGL or the Android API,
236 // then copy the test string into it.
237 if (write_hwbuffer) {
238 void* data = nullptr;
239 error = AHardwareBuffer_lock(hwbuffer,
240 AHARDWAREBUFFER_USAGE_CPU_READ_RARELY, -1,
241 NULL, &data);
242 ASSERT_EQ(error, NO_ERROR);
243 ASSERT_TRUE(data);
244 memcpy(data, test_string.c_str(), test_string.size());
245 error = AHardwareBuffer_unlock(hwbuffer, nullptr);
246 ASSERT_EQ(error, NO_ERROR);
247 } else {
248 void* data =
249 glMapBufferRange(GL_UNIFORM_BUFFER, 0, bufsize,
250 GL_MAP_WRITE_BIT | GL_MAP_INVALIDATE_BUFFER_BIT_EXT);
251 ASSERT_EQ(glGetError(), GL_NO_ERROR);
252 ASSERT_TRUE(data);
253 memcpy(data, test_string.c_str(), test_string.size());
254 glUnmapBuffer(GL_UNIFORM_BUFFER);
255 ASSERT_EQ(glGetError(), GL_NO_ERROR);
256 }
257 // Obtain a readable pointer and verify the data.
258 void* data = glMapBufferRange(GL_UNIFORM_BUFFER, 0, bufsize, GL_MAP_READ_BIT);
259 ASSERT_TRUE(data);
260 ASSERT_EQ(strncmp(static_cast<char*>(data), test_string.c_str(),
261 test_string.size()), 0);
262 glUnmapBuffer(GL_UNIFORM_BUFFER);
263 ASSERT_EQ(glGetError(), GL_NO_ERROR);
264 AHardwareBuffer_release(hwbuffer);
265 }
266
267 extern "C" JNIEXPORT void JNICALL
Java_android_vr_cts_VrExtensionBehaviorTest_nativeTestExternalBuffer(JNIEnv * env,jclass)268 Java_android_vr_cts_VrExtensionBehaviorTest_nativeTestExternalBuffer(
269 JNIEnv* env, jclass /* unused */) {
270 // First, check for EXT_external_buffer in the extension string.
271 auto exts = reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
272 ASSERT_TRUE(exts);
273 if (strstr(exts, "GL_EXT_external_buffer") == nullptr) return;
274 // Next, load entry points provided by extensions.
275 LOAD_PROC(eglGetNativeClientBufferANDROID, PFNEGLGETNATIVECLIENTBUFFERANDROID);
276 ASSERT_NE(eglGetNativeClientBufferANDROID, nullptr);
277 LOAD_PROC(glBufferStorageExternalEXT, PFNGLBUFFERSTORAGEEXTERNALEXTPROC);
278 ASSERT_NE(glBufferStorageExternalEXT, nullptr);
279 LOAD_PROC(glMapBufferRange, PFNGLMAPBUFFERRANGEPROC);
280 ASSERT_NE(glMapBufferRange, nullptr);
281 LOAD_PROC(glUnmapBuffer, PFNGLUNMAPBUFFERPROC);
282 ASSERT_NE(glUnmapBuffer, nullptr);
283 const uint64_t usage = AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN |
284 AHARDWAREBUFFER_USAGE_CPU_READ_RARELY |
285 AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER |
286 AHARDWAREBUFFER_USAGE_SENSOR_DIRECT_DATA;
287 const std::string test_string = "Hello, world.";
288 // First try writing to the buffer using OpenGL, then try writing to it via
289 // the AHardwareBuffer API.
290 testExternalBuffer(env, usage, false, test_string);
291 testExternalBuffer(env, usage, true, test_string);
292 }
293
294 const GLchar* const kSrgbVertexCode = R"(
295 // vertex position in clip space (-1..1)
296 attribute vec4 position;
297 varying mediump vec2 uv;
298 void main() {
299 gl_Position = position;
300 uv = vec2(0.5 * (position.x + 1.0), 0.5);
301 })";
302
303 const GLchar* const kSrgbFragmentCode = R"(
304 varying mediump vec2 uv;
305 uniform sampler2D tex;
306 void main() {
307 gl_FragColor = texture2D(tex, uv);
308 })";
309
SrgbChannelToLinear(float cs)310 static inline float SrgbChannelToLinear(float cs) {
311 if (cs <= 0.04045)
312 return cs / 12.92f;
313 else
314 return std::pow((cs + 0.055f) / 1.055f, 2.4f);
315 }
316
LinearChannelToSrgb(float cs)317 static inline float LinearChannelToSrgb(float cs) {
318 if (cs <= 0.0f)
319 return 0.0f;
320 else if (cs < 0.0031308f)
321 return 12.92f * cs;
322 else if (cs < 1.0f)
323 return 1.055f * std::pow(cs, 0.41666f) - 0.055f;
324 else
325 return 1.0f;
326 }
327
SrgbColorToLinear(uint32_t color)328 static uint32_t SrgbColorToLinear(uint32_t color) {
329 float r = SrgbChannelToLinear((color & 0xff) / 255.0f);
330 float g = SrgbChannelToLinear(((color >> 8) & 0xff) / 255.0f);
331 float b = SrgbChannelToLinear(((color >> 16) & 0xff) / 255.0f);
332 uint32_t r8 = r * 255.0f;
333 uint32_t g8 = g * 255.0f;
334 uint32_t b8 = b * 255.0f;
335 uint32_t a8 = color >> 24;
336 return (a8 << 24) | (b8 << 16) | (g8 << 8) | r8;
337 }
338
LinearColorToSrgb(uint32_t color)339 static uint32_t LinearColorToSrgb(uint32_t color) {
340 float r = LinearChannelToSrgb((color & 0xff) / 255.0f);
341 float g = LinearChannelToSrgb(((color >> 8) & 0xff) / 255.0f);
342 float b = LinearChannelToSrgb(((color >> 16) & 0xff) / 255.0f);
343 uint32_t r8 = r * 255.0f;
344 uint32_t g8 = g * 255.0f;
345 uint32_t b8 = b * 255.0f;
346 uint32_t a8 = color >> 24;
347 return (a8 << 24) | (b8 << 16) | (g8 << 8) | r8;
348 }
349
LerpColor(uint32_t color0,uint32_t color1,float t)350 static uint32_t LerpColor(uint32_t color0, uint32_t color1, float t) {
351 float r0 = (color0 & 0xff) / 255.0f;
352 float g0 = ((color0 >> 8) & 0xff) / 255.0f;
353 float b0 = ((color0 >> 16) & 0xff) / 255.0f;
354 float a0 = ((color0 >> 24) & 0xff) / 255.0f;
355 float r1 = (color1 & 0xff) / 255.0f;
356 float g1 = ((color1 >> 8) & 0xff) / 255.0f;
357 float b1 = ((color1 >> 16) & 0xff) / 255.0f;
358 float a1 = ((color1 >> 24) & 0xff) / 255.0f;
359 uint32_t r8 = (r0 * (1.0f - t) + r1 * t) * 255.0f;
360 uint32_t g8 = (g0 * (1.0f - t) + g1 * t) * 255.0f;
361 uint32_t b8 = (b0 * (1.0f - t) + b1 * t) * 255.0f;
362 uint32_t a8 = (a0 * (1.0f - t) + a1 * t) * 255.0f;
363 return (a8 << 24) | (b8 << 16) | (g8 << 8) | r8;
364 }
365
366 // Choose an odd-numbered framebuffer width so that we can
367 // extract the middle pixel of a gradient.
368 constexpr uint32_t kFramebufferWidth = 31;
369
370 // Declare the pixel data for the 2x1 texture.
371 // Color components are ordered like this: AABBGGRR
372 constexpr uint32_t kTextureData[] = {
373 0xff800000, // Half-Blue
374 0xff000080, // Half-Red
375 };
376 constexpr uint32_t kTextureWidth = sizeof(kTextureData) / sizeof(kTextureData[0]);
377
378 // Declare expected values for the middle pixel for various sampling behaviors.
379 const uint32_t kExpectedMiddlePixel_NoSrgb = LerpColor(kTextureData[0], kTextureData[1], 0.5f);
380 const uint32_t kExpectedMiddlePixel_LinearizeAfterFiltering =
381 SrgbColorToLinear(kExpectedMiddlePixel_NoSrgb);
382 const uint32_t kExpectedMiddlePixel_LinearizeBeforeFiltering =
383 LerpColor(SrgbColorToLinear(kTextureData[0]), SrgbColorToLinear(kTextureData[1]), 0.5f);
384
385 // Declare expected values for the final pixel color for various blending behaviors.
386 constexpr uint32_t kBlendDestColor = 0xff000080;
387 constexpr uint32_t kBlendSourceColor = 0x80800000;
388 const uint32_t kExpectedBlendedPixel_NoSrgb = LerpColor(kBlendSourceColor, kBlendDestColor, 0.5f);
389 const uint32_t kExpectedBlendedPixel_Srgb =
390 LinearColorToSrgb(LerpColor(kBlendSourceColor, SrgbColorToLinear(kBlendDestColor), 0.5f));
391
392 // Define a set of test flags. Not using an enum to avoid lots of casts.
393 namespace SrgbFlag {
394 constexpr uint32_t kHardwareBuffer = 1 << 0;
395 constexpr uint32_t kSrgbFormat = 1 << 1;
396 constexpr uint32_t kEglColorspaceDefault = 1 << 2;
397 constexpr uint32_t kEglColorspaceLinear = 1 << 3;
398 constexpr uint32_t kEglColorspaceSrgb = 1 << 4;
399 } // namespace SrgbFlag
400
configureEglColorspace(EGLint attrs[4],uint32_t srgb_flags)401 static void configureEglColorspace(EGLint attrs[4], uint32_t srgb_flags) {
402 if (srgb_flags & SrgbFlag::kEglColorspaceDefault) {
403 attrs[0] = EGL_GL_COLORSPACE_KHR;
404 attrs[1] = EGL_GL_COLORSPACE_DEFAULT_EXT;
405 } else if (srgb_flags & SrgbFlag::kEglColorspaceLinear) {
406 attrs[0] = EGL_GL_COLORSPACE_KHR;
407 attrs[1] = EGL_GL_COLORSPACE_LINEAR_KHR;
408 } else if (srgb_flags & SrgbFlag::kEglColorspaceSrgb) {
409 attrs[0] = EGL_GL_COLORSPACE_KHR;
410 attrs[1] = EGL_GL_COLORSPACE_SRGB_KHR;
411 } else {
412 attrs[0] = EGL_NONE;
413 attrs[1] = EGL_NONE;
414 }
415 attrs[2] = EGL_NONE;
416 attrs[3] = EGL_NONE;
417 }
418
printSrgbFlags(std::ostream & out,uint32_t srgb_flags)419 static void printSrgbFlags(std::ostream& out, uint32_t srgb_flags) {
420 if (srgb_flags & SrgbFlag::kHardwareBuffer) {
421 out << " AHardwareBuffer";
422 }
423 if (srgb_flags & SrgbFlag::kSrgbFormat) {
424 out << " GL_SRGB_ALPHA";
425 }
426 if (srgb_flags & SrgbFlag::kEglColorspaceDefault) {
427 out << " EGL_GL_COLORSPACE_DEFAULT_KHR";
428 }
429 if (srgb_flags & SrgbFlag::kEglColorspaceLinear) {
430 out << " EGL_GL_COLORSPACE_LINEAR_KHR";
431 }
432 if (srgb_flags & SrgbFlag::kEglColorspaceSrgb) {
433 out << " EGL_GL_COLORSPACE_SRGB_KHR";
434 }
435 }
436
437 // Draws a gradient and extracts the middle pixel. Returns void to allow ASSERT to work.
testLinearMagnification(JNIEnv * env,uint32_t flags,uint32_t * middle_pixel)438 static void testLinearMagnification(JNIEnv* env, uint32_t flags, uint32_t* middle_pixel) {
439 const bool use_hwbuffer = flags & SrgbFlag::kHardwareBuffer;
440 const bool use_srgb_format = flags & SrgbFlag::kSrgbFormat;
441 GLuint srgbtex;
442 glGenTextures(1, &srgbtex);
443 glBindTexture(GL_TEXTURE_2D, srgbtex);
444 if (use_hwbuffer) {
445 // Create a one-dimensional AHardwareBuffer.
446 AHardwareBuffer_Desc desc = {};
447 desc.width = kTextureWidth;
448 desc.height = 1;
449 desc.layers = 1;
450 desc.format = AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM;
451 desc.usage =
452 AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE | AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT;
453 AHardwareBuffer* hwbuffer = nullptr;
454 int error = AHardwareBuffer_allocate(&desc, &hwbuffer);
455 ASSERT_EQ(error, NO_ERROR);
456 // Populate the pixels.
457 uint32_t* pixels = nullptr;
458 error = AHardwareBuffer_lock(hwbuffer, AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN, -1, nullptr,
459 reinterpret_cast<void**>(&pixels));
460 ASSERT_EQ(error, NO_ERROR);
461 ASSERT_TRUE(pixels);
462 memcpy(pixels, kTextureData, sizeof(kTextureData));
463 error = AHardwareBuffer_unlock(hwbuffer, nullptr);
464 ASSERT_EQ(error, NO_ERROR);
465 // Create EGLClientBuffer from the AHardwareBuffer.
466 EGLClientBuffer native_buffer = eglGetNativeClientBufferANDROID(hwbuffer);
467 ASSERT_TRUE(native_buffer);
468 // Create EGLImage from EGLClientBuffer.
469 EGLint attrs[4];
470 configureEglColorspace(attrs, flags);
471 EGLImageKHR image = eglCreateImageKHR(eglGetCurrentDisplay(), EGL_NO_CONTEXT,
472 EGL_NATIVE_BUFFER_ANDROID, native_buffer, attrs);
473 ASSERT_TRUE(image);
474 // Allocate the OpenGL texture using the EGLImage.
475 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
476 } else {
477 GLenum internal_format = use_srgb_format ? GL_SRGB8_ALPHA8_EXT : GL_RGBA8_OES;
478 glTexImage2D(GL_TEXTURE_2D, 0, internal_format, kTextureWidth, 1, 0, GL_RGBA,
479 GL_UNSIGNED_BYTE, kTextureData);
480 }
481 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
482 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
483 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
484 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
485 ASSERT_EQ(glGetError(), GL_NO_ERROR);
486 // Clear to an interesting constant color to make it easier to spot bugs.
487 glClearColor(1.0, 0.0, 0.5, 0.25);
488 glClear(GL_COLOR_BUFFER_BIT);
489 // Draw the texture.
490 const float kTriangleCoords[] = {-1, -1, -1, 1, 1, -1, 1, 1};
491 glBindTexture(GL_TEXTURE_2D, srgbtex);
492 const int kPositionSlot = 0;
493 glVertexAttribPointer(kPositionSlot, 2, GL_FLOAT, false, 0, kTriangleCoords);
494 glEnableVertexAttribArray(kPositionSlot);
495 glViewport(0, 0, kFramebufferWidth, 1);
496 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
497 // Read back the framebuffer.
498 glReadPixels(kFramebufferWidth / 2, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, middle_pixel);
499 std::ostringstream flag_string;
500 printSrgbFlags(flag_string, flags);
501 LOGV("Filtered Result: %8.8X Flags =%s", *middle_pixel, flag_string.str().c_str());
502 ASSERT_EQ(glGetError(), GL_NO_ERROR);
503 }
504
505 // Blends a color into an (optionally) sRGB-encoded framebuffer and extracts the final color.
506 // Returns void to allow ASSERT to work.
testFramebufferBlending(JNIEnv * env,uint32_t flags,uint32_t * final_color)507 static void testFramebufferBlending(JNIEnv* env, uint32_t flags, uint32_t* final_color) {
508 const bool use_hwbuffer = flags & SrgbFlag::kHardwareBuffer;
509 const bool use_srgb_format = flags & SrgbFlag::kSrgbFormat;
510 const bool override_egl_colorspace = use_hwbuffer && (flags & SrgbFlag::kEglColorspaceSrgb);
511 GLuint tex;
512 glGenTextures(1, &tex);
513 glBindTexture(GL_TEXTURE_2D, tex);
514 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
515 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
516 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
517 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
518 // Create a 1x1 half-blue, half-opaque texture.
519 const uint32_t kTextureData[] = {
520 kBlendSourceColor,
521 };
522 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA,
523 GL_UNSIGNED_BYTE, kTextureData);
524 // Create 1x1 framebuffer object.
525 GLuint fbo;
526 glGenFramebuffers(1, &fbo);
527 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
528 GLuint fbotex;
529 glGenTextures(1, &fbotex);
530 glBindTexture(GL_TEXTURE_2D, fbotex);
531 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
532 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
533 if (use_hwbuffer) {
534 AHardwareBuffer_Desc desc = {};
535 desc.width = 1;
536 desc.height = 1;
537 desc.layers = 1;
538 desc.format = AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM;
539 desc.usage =
540 AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE | AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT;
541 AHardwareBuffer* hwbuffer = nullptr;
542 int error = AHardwareBuffer_allocate(&desc, &hwbuffer);
543 ASSERT_EQ(error, NO_ERROR);
544 // Create EGLClientBuffer from the AHardwareBuffer.
545 EGLClientBuffer native_buffer = eglGetNativeClientBufferANDROID(hwbuffer);
546 ASSERT_TRUE(native_buffer);
547 // Create EGLImage from EGLClientBuffer.
548 EGLint attrs[4];
549 configureEglColorspace(attrs, flags);
550 EGLImageKHR image = eglCreateImageKHR(eglGetCurrentDisplay(), EGL_NO_CONTEXT,
551 EGL_NATIVE_BUFFER_ANDROID, native_buffer, attrs);
552 ASSERT_TRUE(image);
553 // Allocate the OpenGL texture using the EGLImage.
554 glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, image);
555 } else {
556 GLenum internal_format = use_srgb_format ? GL_SRGB8_ALPHA8_EXT : GL_RGBA8_OES;
557 glTexImage2D(GL_TEXTURE_2D, 0, internal_format, 1, 1, 0, GL_RGBA,
558 GL_UNSIGNED_BYTE, nullptr);
559 }
560 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
561 GL_TEXTURE_2D, fbotex, 0);
562 ASSERT_EQ(glCheckFramebufferStatus(GL_FRAMEBUFFER), GL_FRAMEBUFFER_COMPLETE);
563 ASSERT_EQ(glGetError(), GL_NO_ERROR);
564 // Clear to half-red.
565 if (use_srgb_format || override_egl_colorspace) {
566 glClearColor(SrgbChannelToLinear(0.5), 0.0, 0.0, 1.0);
567 } else {
568 glClearColor(0.5, 0.0, 0.0, 1.0);
569 }
570 glClear(GL_COLOR_BUFFER_BIT);
571 // Sanity check the cleared color.
572 uint32_t cleared_color = 0;
573 glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &cleared_color);
574 LOGV(" Cleared Color: %8.8X", cleared_color);
575 ASSERT_NEAR_RGBA(cleared_color, kBlendDestColor, 1);
576 // Draw the texture.
577 glEnable(GL_BLEND);
578 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
579 const float kTriangleCoords[] = {-1, -1, -1, 1, 1, -1, 1, 1};
580 glBindTexture(GL_TEXTURE_2D, tex);
581 const int kPositionSlot = 0;
582 glVertexAttribPointer(kPositionSlot, 2, GL_FLOAT, false, 0, kTriangleCoords);
583 glEnableVertexAttribArray(kPositionSlot);
584 glViewport(0, 0, 1, 1);
585 glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
586 // Read back the framebuffer.
587 glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, final_color);
588 std::ostringstream flag_string;
589 printSrgbFlags(flag_string, flags);
590 LOGV("Blending Result: %8.8X Flags =%s", *final_color, flag_string.str().c_str());
591 ASSERT_EQ(glGetError(), GL_NO_ERROR);
592 }
593
594 extern "C" JNIEXPORT void JNICALL
Java_android_vr_cts_VrExtensionBehaviorTest_nativeTestSrgbBuffer(JNIEnv * env,jclass)595 Java_android_vr_cts_VrExtensionBehaviorTest_nativeTestSrgbBuffer(
596 JNIEnv* env, jclass /* unused */) {
597 // First, check the published extension strings against expectations.
598 const char *egl_exts =
599 eglQueryString(eglGetCurrentDisplay(), EGL_EXTENSIONS);
600 LOGV("EGL Extensions: %s", egl_exts);
601 ASSERT_TRUE(egl_exts);
602 bool egl_colorspace_supported = strstr(egl_exts, "EGL_EXT_image_gl_colorspace");
603 auto gl_exts = reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS));
604 LOGV("OpenGL Extensions: %s", gl_exts);
605 ASSERT_TRUE(gl_exts);
606 // Load ancillary entry points provided by extensions.
607 LOAD_PROC(eglGetNativeClientBufferANDROID,
608 PFNEGLGETNATIVECLIENTBUFFERANDROID);
609 ASSERT_NE(eglGetNativeClientBufferANDROID, nullptr);
610 LOAD_PROC(eglCreateImageKHR, PFNEGLCREATEIMAGEKHRPROC);
611 ASSERT_NE(eglCreateImageKHR, nullptr);
612 LOAD_PROC(glEGLImageTargetTexture2DOES,
613 PFNGLEGLIMAGETARGETTEXTURE2DOESPROC);
614 ASSERT_NE(glEGLImageTargetTexture2DOES, nullptr);
615 // Create a plain old one-dimensional FBO to render to.
616 GLuint fbo;
617 glGenFramebuffers(1, &fbo);
618 glBindFramebuffer(GL_FRAMEBUFFER, fbo);
619 GLuint fbotex;
620 glGenTextures(1, &fbotex);
621 glBindTexture(GL_TEXTURE_2D, fbotex);
622 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
623 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
624 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, kFramebufferWidth, 1, 0, GL_RGBA,
625 GL_UNSIGNED_BYTE, nullptr);
626 glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
627 GL_TEXTURE_2D, fbotex, 0);
628 ASSERT_EQ(glCheckFramebufferStatus(GL_FRAMEBUFFER), GL_FRAMEBUFFER_COMPLETE);
629 ASSERT_EQ(glGetError(), GL_NO_ERROR);
630 // Compile and link shaders.
631 int program = glCreateProgram();
632 int vshader = glCreateShader(GL_VERTEX_SHADER);
633 glShaderSource(vshader, 1, &kSrgbVertexCode, nullptr);
634 glCompileShader(vshader);
635 glAttachShader(program, vshader);
636 int fshader = glCreateShader(GL_FRAGMENT_SHADER);
637 glShaderSource(fshader, 1, &kSrgbFragmentCode, nullptr);
638 glCompileShader(fshader);
639 glAttachShader(program, fshader);
640 glLinkProgram(program);
641 int status;
642 glGetProgramiv(program, GL_LINK_STATUS, &status);
643 ASSERT_EQ(status, GL_TRUE);
644 glUseProgram(program);
645 ASSERT_EQ(glGetError(), GL_NO_ERROR);
646
647 // Filtering test.
648 LOGV("Expected value for NoSrgb = %8.8X", kExpectedMiddlePixel_NoSrgb);
649 LOGV("Expected value for Srgb = %8.8X", kExpectedMiddlePixel_LinearizeBeforeFiltering);
650 uint32_t middle_pixel;
651 // First do a sanity check with plain old pre-linearized textures.
652 testLinearMagnification(env, 0, &middle_pixel);
653 ASSERT_NEAR_RGBA(middle_pixel, kExpectedMiddlePixel_NoSrgb, 1);
654 testLinearMagnification(env, SrgbFlag::kHardwareBuffer, &middle_pixel);
655 ASSERT_NEAR_RGBA(middle_pixel, kExpectedMiddlePixel_NoSrgb, 1);
656 // Try a "normally allocated" OpenGL texture with an sRGB source format.
657 testLinearMagnification(env, SrgbFlag::kSrgbFormat, &middle_pixel);
658 ASSERT_NEAR_RGBA(middle_pixel, kExpectedMiddlePixel_LinearizeBeforeFiltering, 1);
659 // Try EGL_EXT_image_gl_colorspace.
660 if (egl_colorspace_supported) {
661 testLinearMagnification(env, SrgbFlag::kHardwareBuffer | SrgbFlag::kEglColorspaceDefault, &middle_pixel);
662 ASSERT_NEAR_RGBA(middle_pixel, kExpectedMiddlePixel_NoSrgb, 1);
663 testLinearMagnification(env, SrgbFlag::kHardwareBuffer | SrgbFlag::kEglColorspaceLinear, &middle_pixel);
664 ASSERT_NEAR_RGBA(middle_pixel, kExpectedMiddlePixel_NoSrgb, 1);
665 testLinearMagnification(env, SrgbFlag::kHardwareBuffer | SrgbFlag::kEglColorspaceSrgb, &middle_pixel);
666 ASSERT_NEAR_RGBA(middle_pixel, kExpectedMiddlePixel_LinearizeBeforeFiltering, 1);
667 }
668
669 // Blending test.
670 LOGV("Expected value for NoSrgb = %8.8X", kExpectedBlendedPixel_NoSrgb);
671 LOGV("Expected value for Srgb = %8.8X", kExpectedBlendedPixel_Srgb);
672 uint32_t final_color;
673 // First do a sanity check with plain old pre-linearized textures.
674 testFramebufferBlending(env, 0, &final_color);
675 ASSERT_NEAR_RGBA(final_color, kExpectedBlendedPixel_NoSrgb, 1);
676 testFramebufferBlending(env, SrgbFlag::kHardwareBuffer, &final_color);
677 ASSERT_NEAR_RGBA(final_color, kExpectedBlendedPixel_NoSrgb, 1);
678 // Try a "normally allocated" OpenGL texture with an sRGB source format.
679 testFramebufferBlending(env, SrgbFlag::kSrgbFormat, &final_color);
680 ASSERT_NEAR_RGBA(final_color, kExpectedBlendedPixel_Srgb, 1);
681 // Try EGL_EXT_image_gl_colorspace.
682 if (egl_colorspace_supported) {
683 testFramebufferBlending(env, SrgbFlag::kHardwareBuffer | SrgbFlag::kEglColorspaceDefault, &final_color);
684 ASSERT_NEAR_RGBA(final_color, kExpectedBlendedPixel_NoSrgb, 1);
685 testFramebufferBlending(env, SrgbFlag::kHardwareBuffer | SrgbFlag::kEglColorspaceLinear, &final_color);
686 ASSERT_NEAR_RGBA(final_color, kExpectedBlendedPixel_NoSrgb, 1);
687 testFramebufferBlending(env, SrgbFlag::kHardwareBuffer | SrgbFlag::kEglColorspaceSrgb, &final_color);
688 ASSERT_NEAR_RGBA(final_color, kExpectedBlendedPixel_Srgb, 1);
689 }
690 }
691