diff options
Diffstat (limited to 'src/image/SkImage_Gpu.cpp')
-rw-r--r-- | src/image/SkImage_Gpu.cpp | 159 |
1 files changed, 128 insertions, 31 deletions
diff --git a/src/image/SkImage_Gpu.cpp b/src/image/SkImage_Gpu.cpp index eec0d19760..06ecda10e2 100644 --- a/src/image/SkImage_Gpu.cpp +++ b/src/image/SkImage_Gpu.cpp @@ -8,57 +8,154 @@ #include "SkImage_Gpu.h" #include "SkCanvas.h" #include "GrContext.h" +#include "SkGpuDevice.h" -SkImage_Gpu::SkImage_Gpu(const SkBitmap& bitmap, int sampleCountForNewSurfaces, - SkSurface::Budgeted budgeted) - : INHERITED(bitmap.width(), bitmap.height(), NULL) - , fBitmap(bitmap) +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) -{ - SkASSERT(fBitmap.getTexture()); -} - -SkShader* SkImage_Gpu::onNewShader(SkShader::TileMode tileX, - SkShader::TileMode tileY, - const SkMatrix* localMatrix) const -{ - return SkShader::CreateBitmapShader(fBitmap, tileX, tileY, localMatrix); -} + {} SkSurface* SkImage_Gpu::onNewSurface(const SkImageInfo& info, const SkSurfaceProps& props) const { - GrContext* ctx = this->getTexture()->getContext(); + 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. - static const SkSurface::Budgeted kBudgeted = SkSurface::kNo_Budgeted; - return SkSurface::NewRenderTarget(ctx, kBudgeted, info, fSampleCountForNewSurfaces, &props); + const SkSurface::Budgeted budgeted = SkSurface::kNo_Budgeted; + return SkSurface::NewRenderTarget(ctx, budgeted, info, fSampleCountForNewSurfaces, &props); +} + +extern void SkTextureImageApplyBudgetedDecision(SkImage* image) { + if (image->getTexture()) { + ((SkImage_Gpu*)image)->applyBudgetDecision(); + } } -GrTexture* SkImage_Gpu::onGetTexture() const { - return fBitmap.getTexture(); +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 { - return fBitmap.copyTo(dst, kN32_SkColorType); + 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 fBitmap.isOpaque(); + 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 + } -SkImage* SkNewImageFromBitmapTexture(const SkBitmap& bitmap, int sampleCountForNewSurfaces, - SkSurface::Budgeted budgeted) { - if (0 == bitmap.width() || 0 == bitmap.height() || NULL == bitmap.getTexture()) { - return NULL; + // 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]); + } } - return SkNEW_ARGS(SkImage_Gpu, (bitmap, sampleCountForNewSurfaces, budgeted)); } -GrTexture* SkTextureImageGetTexture(SkImage* image) { - return ((SkImage_Gpu*)image)->getTexture(); +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; } -extern void SkTextureImageApplyBudgetedDecision(SkImage* image) { - ((SkImage_Gpu*)image)->applyBudgetDecision(); +/////////////////////////////////////////////////////////////////////////////////////////////////// + +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)); } |