| /* |
| * Copyright 2012 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkImage_Gpu.h" |
| #include "GrContext.h" |
| #include "GrDrawContext.h" |
| #include "effects/GrYUVtoRGBEffect.h" |
| #include "SkCanvas.h" |
| #include "SkGpuDevice.h" |
| |
| |
| SkImage_Gpu::SkImage_Gpu(int w, int h, SkAlphaType at, GrTexture* tex, |
| int sampleCountForNewSurfaces, SkSurface::Budgeted budgeted) |
| : INHERITED(w, h, NULL) |
| , fTexture(SkRef(tex)) |
| , fSampleCountForNewSurfaces(sampleCountForNewSurfaces) |
| , fAlphaType(at) |
| , fBudgeted(budgeted) |
| {} |
| |
| SkSurface* SkImage_Gpu::onNewSurface(const SkImageInfo& info, const SkSurfaceProps& props) const { |
| GrTexture* tex = this->getTexture(); |
| SkASSERT(tex); |
| GrContext* ctx = tex->getContext(); |
| if (!ctx) { |
| // the texture may have been abandoned, so we have to check |
| return NULL; |
| } |
| // TODO: Change signature of onNewSurface to take a budgeted param. |
| const SkSurface::Budgeted budgeted = SkSurface::kNo_Budgeted; |
| return SkSurface::NewRenderTarget(ctx, budgeted, info, fSampleCountForNewSurfaces, &props); |
| } |
| |
| extern void SkTextureImageApplyBudgetedDecision(SkImage* image) { |
| if (as_IB(image)->getTexture()) { |
| ((SkImage_Gpu*)image)->applyBudgetDecision(); |
| } |
| } |
| |
| SkShader* SkImage_Gpu::onNewShader(SkShader::TileMode tileX, SkShader::TileMode tileY, |
| const SkMatrix* localMatrix) const { |
| SkBitmap bm; |
| GrWrapTextureInBitmap(fTexture, this->width(), this->height(), this->isOpaque(), &bm); |
| return SkShader::CreateBitmapShader(bm, tileX, tileY, localMatrix); |
| } |
| |
| bool SkImage_Gpu::getROPixels(SkBitmap* dst) const { |
| SkAlphaType at = this->isOpaque() ? kOpaque_SkAlphaType : kPremul_SkAlphaType; |
| if (!dst->tryAllocPixels(SkImageInfo::MakeN32(this->width(), this->height(), at))) { |
| return false; |
| } |
| if (!fTexture->readPixels(0, 0, dst->width(), dst->height(), kSkia8888_GrPixelConfig, |
| dst->getPixels(), dst->rowBytes())) { |
| return false; |
| } |
| return true; |
| } |
| |
| bool SkImage_Gpu::isOpaque() const { |
| return GrPixelConfigIsOpaque(fTexture->config()); |
| } |
| |
| static void apply_premul(const SkImageInfo& info, void* pixels, size_t rowBytes) { |
| switch (info.colorType()) { |
| case kRGBA_8888_SkColorType: |
| case kBGRA_8888_SkColorType: |
| break; |
| default: |
| return; // nothing to do |
| } |
| |
| // SkColor is not necesarily RGBA or BGRA, but it is one of them on little-endian, |
| // and in either case, the alpha-byte is always in the same place, so we can safely call |
| // SkPreMultiplyColor() |
| // |
| SkColor* row = (SkColor*)pixels; |
| for (int y = 0; y < info.height(); ++y) { |
| for (int x = 0; x < info.width(); ++x) { |
| row[x] = SkPreMultiplyColor(row[x]); |
| } |
| } |
| } |
| |
| bool SkImage_Gpu::onReadPixels(const SkImageInfo& info, void* pixels, size_t rowBytes, |
| int srcX, int srcY) const { |
| GrPixelConfig config = SkImageInfo2GrPixelConfig(info.colorType(), info.alphaType(), |
| info.profileType()); |
| uint32_t flags = 0; |
| if (kUnpremul_SkAlphaType == info.alphaType() && kPremul_SkAlphaType == fAlphaType) { |
| // let the GPU perform this transformation for us |
| flags = GrContext::kUnpremul_PixelOpsFlag; |
| } |
| if (!fTexture->readPixels(srcX, srcY, info.width(), info.height(), config, |
| pixels, rowBytes, flags)) { |
| return false; |
| } |
| // do we have to manually fix-up the alpha channel? |
| // src dst |
| // unpremul premul fix manually |
| // premul unpremul done by kUnpremul_PixelOpsFlag |
| // all other combos need to change. |
| // |
| // Should this be handled by Ganesh? todo:? |
| // |
| if (kPremul_SkAlphaType == info.alphaType() && kUnpremul_SkAlphaType == fAlphaType) { |
| apply_premul(info, pixels, rowBytes); |
| } |
| return true; |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| SkImage* SkImage::NewFromTexture(GrContext* ctx, const GrBackendTextureDesc& desc, SkAlphaType at) { |
| if (desc.fWidth <= 0 || desc.fHeight <= 0) { |
| return NULL; |
| } |
| SkAutoTUnref<GrTexture> tex(ctx->textureProvider()->wrapBackendTexture(desc)); |
| if (!tex) { |
| return NULL; |
| } |
| const SkSurface::Budgeted budgeted = SkSurface::kNo_Budgeted; |
| return SkNEW_ARGS(SkImage_Gpu, (desc.fWidth, desc.fHeight, at, tex, 0, budgeted)); |
| } |
| |
| SkImage* SkImage::NewFromTextureCopy(GrContext* ctx, const GrBackendTextureDesc& srcDesc, |
| SkAlphaType at) { |
| const bool isBudgeted = true; |
| const SkSurface::Budgeted budgeted = SkSurface::kYes_Budgeted; |
| |
| if (srcDesc.fWidth <= 0 || srcDesc.fHeight <= 0) { |
| return NULL; |
| } |
| SkAutoTUnref<GrTexture> src(ctx->textureProvider()->wrapBackendTexture(srcDesc)); |
| if (!src) { |
| return NULL; |
| } |
| |
| GrSurfaceDesc dstDesc; |
| // need to be a rendertarget for readpixels to work, instead of kNone_GrSurfaceFlags |
| dstDesc.fFlags = kRenderTarget_GrSurfaceFlag; |
| dstDesc.fOrigin = srcDesc.fOrigin; |
| dstDesc.fWidth = srcDesc.fWidth; |
| dstDesc.fHeight = srcDesc.fHeight; |
| dstDesc.fConfig = srcDesc.fConfig; |
| dstDesc.fSampleCnt = srcDesc.fSampleCnt; |
| |
| SkAutoTUnref<GrTexture> dst(ctx->textureProvider()->createTexture( |
| dstDesc, isBudgeted, NULL, 0)); |
| if (!dst) { |
| return NULL; |
| } |
| |
| const SkIRect srcR = SkIRect::MakeWH(dstDesc.fWidth, dstDesc.fHeight); |
| const SkIPoint dstP = SkIPoint::Make(0, 0); |
| ctx->copySurface(dst, src, srcR, dstP, GrContext::kFlushWrites_PixelOp); |
| |
| const int sampleCount = 0; // todo: make this an explicit parameter to newSurface()? |
| return SkNEW_ARGS(SkImage_Gpu, (dstDesc.fWidth, dstDesc.fHeight, at, dst, sampleCount, |
| budgeted)); |
| } |
| |
| SkImage* SkImage::NewFromYUVTexturesCopy(GrContext* ctx , SkYUVColorSpace colorSpace, |
| const GrBackendObject yuvTextureHandles[3], |
| const SkISize yuvSizes[3], |
| GrSurfaceOrigin origin) { |
| const SkSurface::Budgeted budgeted = SkSurface::kYes_Budgeted; |
| |
| if (yuvSizes[0].fWidth <= 0 || yuvSizes[0].fHeight <= 0 || |
| yuvSizes[1].fWidth <= 0 || yuvSizes[1].fHeight <= 0 || |
| yuvSizes[2].fWidth <= 0 || yuvSizes[2].fHeight <= 0) { |
| return NULL; |
| } |
| static const GrPixelConfig kConfig = kAlpha_8_GrPixelConfig; |
| GrBackendTextureDesc yDesc; |
| yDesc.fConfig = kConfig; |
| yDesc.fOrigin = origin; |
| yDesc.fSampleCnt = 0; |
| yDesc.fTextureHandle = yuvTextureHandles[0]; |
| yDesc.fWidth = yuvSizes[0].fWidth; |
| yDesc.fHeight = yuvSizes[0].fHeight; |
| |
| GrBackendTextureDesc uDesc; |
| uDesc.fConfig = kConfig; |
| uDesc.fOrigin = origin; |
| uDesc.fSampleCnt = 0; |
| uDesc.fTextureHandle = yuvTextureHandles[1]; |
| uDesc.fWidth = yuvSizes[1].fWidth; |
| uDesc.fHeight = yuvSizes[1].fHeight; |
| |
| GrBackendTextureDesc vDesc; |
| vDesc.fConfig = kConfig; |
| vDesc.fOrigin = origin; |
| vDesc.fSampleCnt = 0; |
| vDesc.fTextureHandle = yuvTextureHandles[2]; |
| vDesc.fWidth = yuvSizes[2].fWidth; |
| vDesc.fHeight = yuvSizes[2].fHeight; |
| |
| SkAutoTUnref<GrTexture> yTex(ctx->textureProvider()->wrapBackendTexture(yDesc)); |
| SkAutoTUnref<GrTexture> uTex(ctx->textureProvider()->wrapBackendTexture(uDesc)); |
| SkAutoTUnref<GrTexture> vTex(ctx->textureProvider()->wrapBackendTexture(vDesc)); |
| if (!yTex || !uTex || !vTex) { |
| return NULL; |
| } |
| |
| GrSurfaceDesc dstDesc; |
| // Needs to be a render target in order to draw to it for the yuv->rgb conversion. |
| dstDesc.fFlags = kRenderTarget_GrSurfaceFlag; |
| dstDesc.fOrigin = origin; |
| dstDesc.fWidth = yuvSizes[0].fWidth; |
| dstDesc.fHeight = yuvSizes[0].fHeight; |
| dstDesc.fConfig = kRGBA_8888_GrPixelConfig; |
| dstDesc.fSampleCnt = 0; |
| |
| SkAutoTUnref<GrTexture> dst(ctx->textureProvider()->refScratchTexture( |
| dstDesc, GrTextureProvider::kExact_ScratchTexMatch)); |
| if (!dst) { |
| return NULL; |
| } |
| |
| GrPaint paint; |
| paint.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); |
| paint.addColorProcessor(GrYUVtoRGBEffect::Create(yTex, uTex, vTex, yuvSizes, |
| colorSpace))->unref(); |
| |
| const SkRect rect = SkRect::MakeWH(SkIntToScalar(dstDesc.fWidth), |
| SkIntToScalar(dstDesc.fHeight)); |
| ctx->drawContext()->drawRect(dst->asRenderTarget(), GrClip::WideOpen(), paint, SkMatrix::I(), |
| rect); |
| ctx->flushSurfaceWrites(dst); |
| return SkNEW_ARGS(SkImage_Gpu, (dstDesc.fWidth, dstDesc.fHeight, kOpaque_SkAlphaType, dst, 0, |
| budgeted)); |
| } |