EGLImageTest.cpp revision bd500f09ce5b1ca464431d693f9ec5da60a59230 
1/*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "Test.h"
9#if SK_SUPPORT_GPU
10#include "GrContext.h"
11#include "GrContextFactory.h"
12#include "gl/GrGLGpu.h"
13#include "gl/GrGLUtil.h"
14#include "gl/SkGLContext.h"
15
16static void cleanup(SkGLContext* glctx0, GrGLuint texID0, SkGLContext* glctx1, GrContext* grctx1,
17                    const GrGLTextureInfo* grbackendtex1, GrEGLImage image1) {
18    if (glctx1) {
19        glctx1->makeCurrent();
20        if (grctx1) {
21            if (grbackendtex1) {
22                GrGLGpu* gpu1 = static_cast<GrGLGpu*>(grctx1->getGpu());
23                GrBackendObject handle = reinterpret_cast<GrBackendObject>(grbackendtex1);
24                gpu1->deleteTestingOnlyBackendTexture(handle, false);
25            }
26            grctx1->unref();
27        }
28        if (GR_EGL_NO_IMAGE != image1) {
29            glctx1->destroyEGLImage(image1);
30        }
31    }
32
33    glctx0->makeCurrent();
34    if (texID0) {
35        GR_GL_CALL(glctx0->gl(), DeleteTextures(1, &texID0));
36    }
37}
38
39static void test_read_pixels(skiatest::Reporter* reporter, GrContext* context,
40                             GrTexture* externalTexture, uint32_t expectedPixelValues[]) {
41    int pixelCnt = externalTexture->width() * externalTexture->height();
42    SkAutoTMalloc<uint32_t> pixels(pixelCnt);
43    memset(pixels.get(), 0, sizeof(uint32_t)*pixelCnt);
44    bool read = externalTexture->readPixels(0, 0, externalTexture->width(),
45                                            externalTexture->height(), kRGBA_8888_GrPixelConfig,
46                                            pixels.get());
47    if (!read) {
48        ERRORF(reporter, "Error reading external texture.");
49    }
50    for (int i = 0; i < pixelCnt; ++i) {
51        if (pixels.get()[i] != expectedPixelValues[i]) {
52            ERRORF(reporter, "Error, external texture pixel value %d should be 0x%08x,"
53                             " got 0x%08x.", i, expectedPixelValues[i], pixels.get()[i]);
54            break;
55        }
56    }
57}
58
59static void test_write_pixels(skiatest::Reporter* reporter, GrContext* context,
60                              GrTexture* externalTexture) {
61    int pixelCnt = externalTexture->width() * externalTexture->height();
62    SkAutoTMalloc<uint32_t> pixels(pixelCnt);
63    memset(pixels.get(), 0, sizeof(uint32_t)*pixelCnt);
64    bool write = externalTexture->writePixels(0, 0, 0, 0, kRGBA_8888_GrPixelConfig, pixels.get());
65    REPORTER_ASSERT_MESSAGE(reporter, !write, "Should not be able to write to a EXTERNAL"
66                                              " texture.");
67}
68
69static void test_copy_surface(skiatest::Reporter* reporter, GrContext* context,
70                              GrTexture* externalTexture, uint32_t expectedPixelValues[]) {
71    GrSurfaceDesc copyDesc;
72    copyDesc.fConfig = kRGBA_8888_GrPixelConfig;
73    copyDesc.fWidth = externalTexture->width();
74    copyDesc.fHeight = externalTexture->height();
75    copyDesc.fFlags = kRenderTarget_GrSurfaceFlag;
76    SkAutoTUnref<GrTexture> copy(context->textureProvider()->createTexture(copyDesc, true));
77    context->copySurface(copy, externalTexture);
78    test_read_pixels(reporter, context, copy, expectedPixelValues);
79}
80
81DEF_GPUTEST_FOR_RENDERING_CONTEXTS(EGLImageTest, reporter, context0, glCtx0) {
82    // Try to create a second GL context and then check if the contexts have necessary
83    // extensions to run this test.
84
85    if (kGLES_GrGLStandard != glCtx0->gl()->fStandard) {
86        return;
87    }
88    GrGLGpu* gpu0 = static_cast<GrGLGpu*>(context0->getGpu());
89    if (!gpu0->glCaps().externalTextureSupport()) {
90        return;
91    }
92
93    SkAutoTDelete<SkGLContext> glCtx1 = glCtx0->createNew();
94    if (!glCtx1) {
95        return;
96    }
97    GrContext* context1 = GrContext::Create(kOpenGL_GrBackend, (GrBackendContext)glCtx1->gl());
98    const GrGLTextureInfo* backendTexture1 = nullptr;
99    GrEGLImage image = GR_EGL_NO_IMAGE;
100    GrGLTextureInfo externalTexture;
101    externalTexture.fID = 0;
102
103    if (!context1) {
104        cleanup(glCtx0, externalTexture.fID, glCtx1, context1, backendTexture1, image);
105        return;
106    }
107
108    if (!glCtx1->gl()->hasExtension("EGL_KHR_image") ||
109        !glCtx1->gl()->hasExtension("EGL_KHR_gl_texture_2D_image")) {
110        cleanup(glCtx0, externalTexture.fID, glCtx1, context1, backendTexture1, image);
111        return;
112    }
113
114    ///////////////////////////////// CONTEXT 1 ///////////////////////////////////
115
116    // Use GL Context 1 to create a texture unknown to GrContext.
117    context1->flush();
118    GrGpu* gpu1 = context1->getGpu();
119    static const int kSize = 100;
120    backendTexture1 = reinterpret_cast<const GrGLTextureInfo*>(
121        gpu1->createTestingOnlyBackendTexture(nullptr, kSize, kSize, kRGBA_8888_GrPixelConfig));
122    if (!backendTexture1 || !backendTexture1->fID) {
123        ERRORF(reporter, "Error creating texture for EGL Image");
124        cleanup(glCtx0, externalTexture.fID, glCtx1, context1, backendTexture1, image);
125        return;
126    }
127    if (GR_GL_TEXTURE_2D != backendTexture1->fTarget) {
128        ERRORF(reporter, "Expected backend texture to be 2D");
129        cleanup(glCtx0, externalTexture.fID, glCtx1, context1, backendTexture1, image);
130        return;
131    }
132
133    // Wrap the texture in an EGLImage
134    image = glCtx1->texture2DToEGLImage(backendTexture1->fID);
135    if (GR_EGL_NO_IMAGE == image) {
136        ERRORF(reporter, "Error creating EGL Image from texture");
137        cleanup(glCtx0, externalTexture.fID, glCtx1, context1, backendTexture1, image);
138        return;
139    }
140
141    // Populate the texture using GL context 1. Important to use TexSubImage as TexImage orphans
142    // the EGL image. Also, this must be done after creating the EGLImage as the texture
143    // contents may not be preserved when the image is created.
144    SkAutoTMalloc<uint32_t> pixels(kSize * kSize);
145    for (int i = 0; i < kSize*kSize; ++i) {
146        pixels.get()[i] = 0xDDAABBCC;
147    }
148    GR_GL_CALL(glCtx1->gl(), ActiveTexture(GR_GL_TEXTURE0));
149    GR_GL_CALL(glCtx1->gl(), BindTexture(backendTexture1->fTarget, backendTexture1->fID));
150    GR_GL_CALL(glCtx1->gl(), TexSubImage2D(backendTexture1->fTarget, 0, 0, 0, kSize, kSize,
151                                           GR_GL_RGBA, GR_GL_UNSIGNED_BYTE, pixels.get()));
152    GR_GL_CALL(glCtx1->gl(), Finish());
153    // We've been making direct GL calls in GL context 1, let GrContext 1 know its internal
154    // state is invalid.
155    context1->resetContext();
156
157    ///////////////////////////////// CONTEXT 0 ///////////////////////////////////
158
159    // Make a new texture ID in GL Context 0 from the EGL Image
160    glCtx0->makeCurrent();
161    externalTexture.fTarget = GR_GL_TEXTURE_EXTERNAL;
162    externalTexture.fID = glCtx0->eglImageToExternalTexture(image);
163
164    // Wrap this texture ID in a GrTexture
165    GrBackendTextureDesc externalDesc;
166    externalDesc.fConfig = kRGBA_8888_GrPixelConfig;
167    externalDesc.fWidth = kSize;
168    externalDesc.fHeight = kSize;
169    externalDesc.fTextureHandle = reinterpret_cast<GrBackendObject>(&externalTexture);
170    SkAutoTUnref<GrTexture> externalTextureObj(
171        context0->textureProvider()->wrapBackendTexture(externalDesc));
172    if (!externalTextureObj) {
173        ERRORF(reporter, "Error wrapping external texture in GrTexture.");
174        cleanup(glCtx0, externalTexture.fID, glCtx1, context1, backendTexture1, image);
175        return;
176    }
177
178    // Should not be able to wrap as a RT
179    externalDesc.fFlags = kRenderTarget_GrBackendTextureFlag;
180    SkAutoTUnref<GrTexture> externalTextureRTObj(
181        context0->textureProvider()->wrapBackendTexture(externalDesc));
182    if (externalTextureRTObj) {
183        ERRORF(reporter, "Should not be able to wrap an EXTERNAL texture as a RT.");
184    }
185    externalDesc.fFlags = kNone_GrBackendTextureFlag;
186
187    // Should not be able to wrap with a sample count
188    externalDesc.fSampleCnt = 4;
189    SkAutoTUnref<GrTexture> externalTextureMSAAObj(
190        context0->textureProvider()->wrapBackendTexture(externalDesc));
191    if (externalTextureMSAAObj) {
192        ERRORF(reporter, "Should not be able to wrap an EXTERNAL texture with MSAA.");
193    }
194    externalDesc.fSampleCnt = 0;
195
196    test_read_pixels(reporter, context0, externalTextureObj, pixels.get());
197
198    test_write_pixels(reporter, context0, externalTextureObj);
199
200    test_copy_surface(reporter, context0, externalTextureObj, pixels.get());
201
202    cleanup(glCtx0, externalTexture.fID, glCtx1, context1, backendTexture1, image);
203}
204
205#endif
206