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/*
* 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 "SkiaOpenGLReadback.h"
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <GrBackendSurface.h>
#include <SkCanvas.h>
#include <SkSurface.h>
#include <gl/GrGLInterface.h>
#include <gl/GrGLTypes.h>
#include "DeviceInfo.h"
#include "Matrix.h"
#include "Properties.h"
#include "utils/MathUtils.h"
using namespace android::uirenderer::renderthread;
namespace android {
namespace uirenderer {
namespace skiapipeline {
CopyResult SkiaOpenGLReadback::copyImageInto(EGLImageKHR eglImage, const Matrix4& imgTransform,
int imgWidth, int imgHeight, const Rect& srcRect,
SkBitmap* bitmap) {
GLuint sourceTexId;
glGenTextures(1, &sourceTexId);
glBindTexture(GL_TEXTURE_EXTERNAL_OES, sourceTexId);
glEGLImageTargetTexture2DOES(GL_TEXTURE_EXTERNAL_OES, eglImage);
sk_sp<GrContext> grContext = sk_ref_sp(mRenderThread.getGrContext());
if (Properties::getRenderPipelineType() == RenderPipelineType::SkiaVulkan) {
sk_sp<const GrGLInterface> glInterface(GrGLCreateNativeInterface());
LOG_ALWAYS_FATAL_IF(!glInterface.get());
grContext = GrContext::MakeGL(std::move(glInterface));
} else {
grContext->resetContext();
}
GrGLTextureInfo externalTexture;
externalTexture.fTarget = GL_TEXTURE_EXTERNAL_OES;
externalTexture.fID = sourceTexId;
GrPixelConfig pixelConfig;
switch (bitmap->colorType()) {
case kRGBA_F16_SkColorType:
pixelConfig = kRGBA_half_GrPixelConfig;
break;
case kN32_SkColorType:
default:
pixelConfig = kRGBA_8888_GrPixelConfig;
break;
}
if (pixelConfig == kRGBA_half_GrPixelConfig &&
!grContext->caps()->isConfigRenderable(kRGBA_half_GrPixelConfig, false)) {
ALOGW("Can't copy surface into bitmap, RGBA_F16 config is not supported");
return CopyResult::DestinationInvalid;
}
GrBackendTexture backendTexture(imgWidth, imgHeight, pixelConfig, externalTexture);
CopyResult copyResult = CopyResult::UnknownError;
sk_sp<SkImage> image(SkImage::MakeFromAdoptedTexture(grContext.get(), backendTexture,
kTopLeft_GrSurfaceOrigin));
if (image) {
int displayedWidth = imgWidth, displayedHeight = imgHeight;
// If this is a 90 or 270 degree rotation we need to swap width/height to get the device
// size.
if (imgTransform[Matrix4::kSkewX] >= 0.5f || imgTransform[Matrix4::kSkewX] <= -0.5f) {
std::swap(displayedWidth, displayedHeight);
}
SkRect skiaDestRect = SkRect::MakeWH(bitmap->width(), bitmap->height());
SkRect skiaSrcRect = srcRect.toSkRect();
if (skiaSrcRect.isEmpty()) {
skiaSrcRect = SkRect::MakeIWH(displayedWidth, displayedHeight);
}
bool srcNotEmpty = skiaSrcRect.intersect(SkRect::MakeIWH(displayedWidth, displayedHeight));
if (srcNotEmpty) {
SkMatrix textureMatrixInv;
imgTransform.copyTo(textureMatrixInv);
// TODO: after skia bug https://bugs.chromium.org/p/skia/issues/detail?id=7075 is fixed
// use bottom left origin and remove flipV and invert transformations.
SkMatrix flipV;
flipV.setAll(1, 0, 0, 0, -1, 1, 0, 0, 1);
textureMatrixInv.preConcat(flipV);
textureMatrixInv.preScale(1.0f / displayedWidth, 1.0f / displayedHeight);
textureMatrixInv.postScale(imgWidth, imgHeight);
SkMatrix textureMatrix;
if (!textureMatrixInv.invert(&textureMatrix)) {
textureMatrix = textureMatrixInv;
}
textureMatrixInv.mapRect(&skiaSrcRect);
textureMatrixInv.mapRect(&skiaDestRect);
// we render in an offscreen buffer to scale and to avoid an issue b/62262733
// with reading incorrect data from EGLImage backed SkImage (likely a driver bug)
sk_sp<SkSurface> scaledSurface =
SkSurface::MakeRenderTarget(grContext.get(), SkBudgeted::kYes, bitmap->info());
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc);
// Apply a filter, which is matching OpenGL pipeline readback behaviour. Filter usage
// is codified by tests using golden images like DecodeAccuracyTest.
bool disableFilter = MathUtils::areEqual(skiaSrcRect.width(), skiaDestRect.width())
&& MathUtils::areEqual(skiaSrcRect.height(), skiaDestRect.height());
if (!disableFilter) {
paint.setFilterQuality(kLow_SkFilterQuality);
}
scaledSurface->getCanvas()->concat(textureMatrix);
scaledSurface->getCanvas()->drawImageRect(image, skiaSrcRect, skiaDestRect, &paint,
SkCanvas::kFast_SrcRectConstraint);
image = scaledSurface->makeImageSnapshot();
if (image->readPixels(bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), 0, 0)) {
bitmap->notifyPixelsChanged();
copyResult = CopyResult::Success;
}
}
}
// make sure that we have deleted the texture (in the SkImage) before we
// destroy the EGLImage that it was created from
image.reset();
return copyResult;
}
} /* namespace skiapipeline */
} /* namespace uirenderer */
} /* namespace android */
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