| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "Readback.h" |
| |
| #include "Caches.h" |
| #include "Image.h" |
| #include "GlopBuilder.h" |
| #include "Layer.h" |
| #include "renderstate/RenderState.h" |
| #include "renderthread/EglManager.h" |
| #include "utils/GLUtils.h" |
| |
| #include <GLES2/gl2.h> |
| #include <ui/Fence.h> |
| #include <ui/GraphicBuffer.h> |
| |
| namespace android { |
| namespace uirenderer { |
| |
| static CopyResult copyTextureInto(Caches& caches, RenderState& renderState, |
| Texture& sourceTexture, Matrix4& texTransform, SkBitmap* bitmap) { |
| int destWidth = bitmap->width(); |
| int destHeight = bitmap->height(); |
| if (destWidth > caches.maxTextureSize |
| || destHeight > caches.maxTextureSize) { |
| ALOGW("Can't copy surface into bitmap, %dx%d exceeds max texture size %d", |
| destWidth, destHeight, caches.maxTextureSize); |
| return CopyResult::DestinationInvalid; |
| } |
| GLuint fbo = renderState.createFramebuffer(); |
| if (!fbo) { |
| ALOGW("Could not obtain an FBO"); |
| return CopyResult::UnknownError; |
| } |
| |
| SkAutoLockPixels alp(*bitmap); |
| |
| GLuint texture; |
| |
| GLenum format; |
| GLenum type; |
| |
| switch (bitmap->colorType()) { |
| case kAlpha_8_SkColorType: |
| format = GL_ALPHA; |
| type = GL_UNSIGNED_BYTE; |
| break; |
| case kRGB_565_SkColorType: |
| format = GL_RGB; |
| type = GL_UNSIGNED_SHORT_5_6_5; |
| break; |
| case kARGB_4444_SkColorType: |
| format = GL_RGBA; |
| type = GL_UNSIGNED_SHORT_4_4_4_4; |
| break; |
| case kN32_SkColorType: |
| default: |
| format = GL_RGBA; |
| type = GL_UNSIGNED_BYTE; |
| break; |
| } |
| |
| renderState.bindFramebuffer(fbo); |
| |
| // TODO: Use layerPool or something to get this maybe? But since we |
| // need explicit format control we can't currently. |
| |
| // Setup the rendertarget |
| glGenTextures(1, &texture); |
| caches.textureState().activateTexture(0); |
| caches.textureState().bindTexture(texture); |
| glPixelStorei(GL_PACK_ALIGNMENT, bitmap->bytesPerPixel()); |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
| glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
| glTexImage2D(GL_TEXTURE_2D, 0, format, destWidth, destHeight, |
| 0, format, type, nullptr); |
| glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, |
| GL_TEXTURE_2D, texture, 0); |
| |
| { |
| // Draw & readback |
| renderState.setViewport(destWidth, destHeight); |
| renderState.scissor().setEnabled(false); |
| renderState.blend().syncEnabled(); |
| renderState.stencil().disable(); |
| |
| Glop glop; |
| GlopBuilder(renderState, caches, &glop) |
| .setRoundRectClipState(nullptr) |
| .setMeshTexturedUnitQuad(nullptr) |
| .setFillExternalTexture(sourceTexture, texTransform) |
| .setTransform(Matrix4::identity(), TransformFlags::None) |
| .setModelViewMapUnitToRect(Rect(destWidth, destHeight)) |
| .build(); |
| Matrix4 ortho; |
| ortho.loadOrtho(destWidth, destHeight); |
| renderState.render(glop, ortho); |
| |
| glReadPixels(0, 0, bitmap->width(), bitmap->height(), format, |
| type, bitmap->getPixels()); |
| } |
| |
| // Cleanup |
| caches.textureState().deleteTexture(texture); |
| renderState.deleteFramebuffer(fbo); |
| |
| GL_CHECKPOINT(MODERATE); |
| |
| return CopyResult::Success; |
| } |
| |
| CopyResult Readback::copySurfaceInto(renderthread::RenderThread& renderThread, |
| Surface& surface, SkBitmap* bitmap) { |
| renderThread.eglManager().initialize(); |
| |
| Caches& caches = Caches::getInstance(); |
| |
| // Setup the source |
| sp<GraphicBuffer> sourceBuffer; |
| sp<Fence> sourceFence; |
| Matrix4 texTransform; |
| status_t err = surface.getLastQueuedBuffer(&sourceBuffer, &sourceFence, |
| texTransform.data); |
| texTransform.invalidateType(); |
| if (err != NO_ERROR) { |
| ALOGW("Failed to get last queued buffer, error = %d", err); |
| return CopyResult::UnknownError; |
| } |
| if (!sourceBuffer.get()) { |
| ALOGW("Surface doesn't have any previously queued frames, nothing to readback from"); |
| return CopyResult::SourceEmpty; |
| } |
| if (sourceBuffer->getUsage() & GRALLOC_USAGE_PROTECTED) { |
| ALOGW("Surface is protected, unable to copy from it"); |
| return CopyResult::SourceInvalid; |
| } |
| err = sourceFence->wait(500 /* ms */); |
| if (err != NO_ERROR) { |
| ALOGE("Timeout (500ms) exceeded waiting for buffer fence, abandoning readback attempt"); |
| return CopyResult::Timeout; |
| } |
| |
| // TODO: Can't use Image helper since it forces GL_TEXTURE_2D usage via |
| // GL_OES_EGL_image, which doesn't work since we need samplerExternalOES |
| // to be able to properly sample from the buffer. |
| |
| // Create the EGLImage object that maps the GraphicBuffer |
| EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY); |
| EGLClientBuffer clientBuffer = (EGLClientBuffer) sourceBuffer->getNativeBuffer(); |
| EGLint attrs[] = { EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, EGL_NONE }; |
| |
| EGLImageKHR sourceImage = eglCreateImageKHR(display, EGL_NO_CONTEXT, |
| EGL_NATIVE_BUFFER_ANDROID, clientBuffer, attrs); |
| |
| if (sourceImage == EGL_NO_IMAGE_KHR) { |
| ALOGW("eglCreateImageKHR failed (%#x)", eglGetError()); |
| return CopyResult::UnknownError; |
| } |
| GLuint sourceTexId; |
| // Create a 2D texture to sample from the EGLImage |
| glGenTextures(1, &sourceTexId); |
| caches.textureState().bindTexture(GL_TEXTURE_EXTERNAL_OES, sourceTexId); |
| glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, sourceImage); |
| |
| GLenum status = GL_NO_ERROR; |
| while ((status = glGetError()) != GL_NO_ERROR) { |
| ALOGW("glEGLImageTargetTexture2DOES failed (%#x)", status); |
| eglDestroyImageKHR(display, sourceImage); |
| return CopyResult::UnknownError; |
| } |
| |
| Texture sourceTexture(caches); |
| sourceTexture.wrap(sourceTexId, |
| sourceBuffer->getWidth(), sourceBuffer->getHeight(), 0 /* total lie */); |
| |
| CopyResult copyResult = copyTextureInto(caches, renderThread.renderState(), |
| sourceTexture, texTransform, bitmap); |
| sourceTexture.deleteTexture(); |
| // All we're flushing & finishing is the deletion of the texture since |
| // copyTextureInto already did a major flush & finish as an implicit |
| // part of glReadPixels, so this shouldn't pose any major stalls. |
| glFinish(); |
| eglDestroyImageKHR(display, sourceImage); |
| return copyResult; |
| } |
| |
| CopyResult Readback::copyTextureLayerInto(renderthread::RenderThread& renderThread, |
| Layer& layer, SkBitmap* bitmap) { |
| return copyTextureInto(Caches::getInstance(), renderThread.renderState(), |
| layer.getTexture(), layer.getTexTransform(), bitmap); |
| } |
| |
| } // namespace uirenderer |
| } // namespace android |