| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkArenaAlloc.h" |
| #include "SkBitmapController.h" |
| #include "SkBitmapProcShader.h" |
| #include "SkBitmapProvider.h" |
| #include "SkColorTable.h" |
| #include "SkEmptyShader.h" |
| #include "SkImage_Base.h" |
| #include "SkImageShader.h" |
| #include "SkPM4fPriv.h" |
| #include "SkReadBuffer.h" |
| #include "SkWriteBuffer.h" |
| #include "../jumper/SkJumper.h" |
| |
| SkImageShader::SkImageShader(sk_sp<SkImage> img, TileMode tmx, TileMode tmy, const SkMatrix* matrix) |
| : INHERITED(matrix) |
| , fImage(std::move(img)) |
| , fTileModeX(tmx) |
| , fTileModeY(tmy) |
| {} |
| |
| sk_sp<SkFlattenable> SkImageShader::CreateProc(SkReadBuffer& buffer) { |
| const TileMode tx = (TileMode)buffer.readUInt(); |
| const TileMode ty = (TileMode)buffer.readUInt(); |
| SkMatrix matrix; |
| buffer.readMatrix(&matrix); |
| sk_sp<SkImage> img = buffer.readImage(); |
| if (!img) { |
| return nullptr; |
| } |
| return SkImageShader::Make(std::move(img), tx, ty, &matrix); |
| } |
| |
| void SkImageShader::flatten(SkWriteBuffer& buffer) const { |
| buffer.writeUInt(fTileModeX); |
| buffer.writeUInt(fTileModeY); |
| buffer.writeMatrix(this->getLocalMatrix()); |
| buffer.writeImage(fImage.get()); |
| } |
| |
| bool SkImageShader::isOpaque() const { |
| return fImage->isOpaque(); |
| } |
| |
| SkShader::Context* SkImageShader::onMakeContext(const ContextRec& rec, SkArenaAlloc* alloc) const { |
| return SkBitmapProcLegacyShader::MakeContext(*this, fTileModeX, fTileModeY, |
| SkBitmapProvider(fImage.get(), rec.fDstColorSpace), |
| rec, alloc); |
| } |
| |
| SkImage* SkImageShader::onIsAImage(SkMatrix* texM, TileMode xy[]) const { |
| if (texM) { |
| *texM = this->getLocalMatrix(); |
| } |
| if (xy) { |
| xy[0] = (TileMode)fTileModeX; |
| xy[1] = (TileMode)fTileModeY; |
| } |
| return const_cast<SkImage*>(fImage.get()); |
| } |
| |
| #ifdef SK_SUPPORT_LEGACY_SHADER_ISABITMAP |
| bool SkImageShader::onIsABitmap(SkBitmap* texture, SkMatrix* texM, TileMode xy[]) const { |
| const SkBitmap* bm = as_IB(fImage)->onPeekBitmap(); |
| if (!bm) { |
| return false; |
| } |
| |
| if (texture) { |
| *texture = *bm; |
| } |
| if (texM) { |
| *texM = this->getLocalMatrix(); |
| } |
| if (xy) { |
| xy[0] = (TileMode)fTileModeX; |
| xy[1] = (TileMode)fTileModeY; |
| } |
| return true; |
| } |
| #endif |
| |
| static bool bitmap_is_too_big(int w, int h) { |
| // SkBitmapProcShader stores bitmap coordinates in a 16bit buffer, as it |
| // communicates between its matrix-proc and its sampler-proc. Until we can |
| // widen that, we have to reject bitmaps that are larger. |
| // |
| static const int kMaxSize = 65535; |
| |
| return w > kMaxSize || h > kMaxSize; |
| } |
| |
| sk_sp<SkShader> SkImageShader::Make(sk_sp<SkImage> image, TileMode tx, TileMode ty, |
| const SkMatrix* localMatrix) { |
| if (!image || bitmap_is_too_big(image->width(), image->height())) { |
| return sk_make_sp<SkEmptyShader>(); |
| } else { |
| return sk_make_sp<SkImageShader>(image, tx, ty, localMatrix); |
| } |
| } |
| |
| #ifndef SK_IGNORE_TO_STRING |
| void SkImageShader::toString(SkString* str) const { |
| const char* gTileModeName[SkShader::kTileModeCount] = { |
| "clamp", "repeat", "mirror" |
| }; |
| |
| str->appendf("ImageShader: ((%s %s) ", gTileModeName[fTileModeX], gTileModeName[fTileModeY]); |
| fImage->toString(str); |
| this->INHERITED::toString(str); |
| str->append(")"); |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| #if SK_SUPPORT_GPU |
| |
| #include "SkGr.h" |
| #include "GrContext.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| #include "effects/GrBicubicEffect.h" |
| #include "effects/GrSimpleTextureEffect.h" |
| |
| sk_sp<GrFragmentProcessor> SkImageShader::asFragmentProcessor(const AsFPArgs& args) const { |
| |
| SkMatrix lmInverse; |
| if (!this->getLocalMatrix().invert(&lmInverse)) { |
| return nullptr; |
| } |
| if (args.fLocalMatrix) { |
| SkMatrix inv; |
| if (!args.fLocalMatrix->invert(&inv)) { |
| return nullptr; |
| } |
| lmInverse.postConcat(inv); |
| } |
| |
| SkShader::TileMode tm[] = { fTileModeX, fTileModeY }; |
| |
| // Must set wrap and filter on the sampler before requesting a texture. In two places below |
| // we check the matrix scale factors to determine how to interpret the filter quality setting. |
| // This completely ignores the complexity of the drawVertices case where explicit local coords |
| // are provided by the caller. |
| bool doBicubic; |
| GrSamplerParams::FilterMode textureFilterMode = |
| GrSkFilterQualityToGrFilterMode(args.fFilterQuality, *args.fViewMatrix, this->getLocalMatrix(), |
| &doBicubic); |
| GrSamplerParams params(tm, textureFilterMode); |
| sk_sp<SkColorSpace> texColorSpace; |
| SkScalar scaleAdjust[2] = { 1.0f, 1.0f }; |
| sk_sp<GrTextureProxy> proxy(as_IB(fImage)->asTextureProxyRef(args.fContext, params, |
| args.fDstColorSpace, |
| &texColorSpace, scaleAdjust)); |
| if (!proxy) { |
| return nullptr; |
| } |
| |
| bool isAlphaOnly = GrPixelConfigIsAlphaOnly(proxy->config()); |
| |
| lmInverse.postScale(scaleAdjust[0], scaleAdjust[1]); |
| |
| sk_sp<GrColorSpaceXform> colorSpaceXform = GrColorSpaceXform::Make(texColorSpace.get(), |
| args.fDstColorSpace); |
| sk_sp<GrFragmentProcessor> inner; |
| if (doBicubic) { |
| inner = GrBicubicEffect::Make(args.fContext->resourceProvider(), std::move(proxy), |
| std::move(colorSpaceXform), lmInverse, tm); |
| } else { |
| inner = GrSimpleTextureEffect::Make(args.fContext->resourceProvider(), std::move(proxy), |
| std::move(colorSpaceXform), lmInverse, params); |
| } |
| |
| if (isAlphaOnly) { |
| return inner; |
| } |
| return sk_sp<GrFragmentProcessor>(GrFragmentProcessor::MulOutputByInputAlpha(std::move(inner))); |
| } |
| |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| #include "SkImagePriv.h" |
| |
| sk_sp<SkShader> SkMakeBitmapShader(const SkBitmap& src, SkShader::TileMode tmx, |
| SkShader::TileMode tmy, const SkMatrix* localMatrix, |
| SkCopyPixelsMode cpm) { |
| return SkImageShader::Make(SkMakeImageFromRasterBitmap(src, cpm), |
| tmx, tmy, localMatrix); |
| } |
| |
| static sk_sp<SkFlattenable> SkBitmapProcShader_CreateProc(SkReadBuffer& buffer) { |
| SkMatrix lm; |
| buffer.readMatrix(&lm); |
| sk_sp<SkImage> image = buffer.readBitmapAsImage(); |
| SkShader::TileMode mx = (SkShader::TileMode)buffer.readUInt(); |
| SkShader::TileMode my = (SkShader::TileMode)buffer.readUInt(); |
| return image ? image->makeShader(mx, my, &lm) : nullptr; |
| } |
| |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkShader) |
| SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkImageShader) |
| SkFlattenable::Register("SkBitmapProcShader", SkBitmapProcShader_CreateProc, kSkShader_Type); |
| SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END |
| |
| |
| bool SkImageShader::onAppendStages(SkRasterPipeline* p, SkColorSpace* dstCS, SkArenaAlloc* alloc, |
| const SkMatrix& ctm, const SkPaint& paint, |
| const SkMatrix* localM) const { |
| auto matrix = SkMatrix::Concat(ctm, this->getLocalMatrix()); |
| if (localM) { |
| matrix.preConcat(*localM); |
| } |
| |
| if (!matrix.invert(&matrix)) { |
| return false; |
| } |
| auto quality = paint.getFilterQuality(); |
| |
| SkBitmapProvider provider(fImage.get(), dstCS); |
| SkDefaultBitmapController controller(SkDefaultBitmapController::CanShadeHQ::kYes); |
| std::unique_ptr<SkBitmapController::State> state { |
| controller.requestBitmap(provider, matrix, quality) |
| }; |
| if (!state) { |
| return false; |
| } |
| |
| const SkPixmap& pm = state->pixmap(); |
| matrix = state->invMatrix(); |
| quality = state->quality(); |
| auto info = pm.info(); |
| |
| // When the matrix is just an integer translate, bilerp == nearest neighbor. |
| if (quality == kLow_SkFilterQuality && |
| matrix.getType() <= SkMatrix::kTranslate_Mask && |
| matrix.getTranslateX() == (int)matrix.getTranslateX() && |
| matrix.getTranslateY() == (int)matrix.getTranslateY()) { |
| quality = kNone_SkFilterQuality; |
| } |
| |
| // See skia:4649 and the GM image_scale_aligned. |
| if (quality == kNone_SkFilterQuality) { |
| if (matrix.getScaleX() >= 0) { |
| matrix.setTranslateX(nextafterf(matrix.getTranslateX(), |
| floorf(matrix.getTranslateX()))); |
| } |
| if (matrix.getScaleY() >= 0) { |
| matrix.setTranslateY(nextafterf(matrix.getTranslateY(), |
| floorf(matrix.getTranslateY()))); |
| } |
| } |
| |
| |
| struct MiscCtx { |
| std::unique_ptr<SkBitmapController::State> state; |
| SkColor4f paint_color; |
| float matrix[9]; |
| }; |
| auto misc = alloc->make<MiscCtx>(); |
| misc->state = std::move(state); // Extend lifetime to match the pipeline's. |
| misc->paint_color = SkColor4f_from_SkColor(paint.getColor(), dstCS); |
| if (matrix.asAffine(misc->matrix)) { |
| p->append(SkRasterPipeline::matrix_2x3, misc->matrix); |
| } else { |
| matrix.get9(misc->matrix); |
| p->append(SkRasterPipeline::matrix_perspective, misc->matrix); |
| } |
| |
| auto gather = alloc->make<SkJumper_GatherCtx>(); |
| gather->pixels = pm.addr(); |
| gather->ctable = pm.ctable() ? pm.ctable()->readColors() : nullptr; |
| gather->stride = pm.rowBytesAsPixels(); |
| |
| // Tiling stages (clamp_x, mirror_y, etc.) are inclusive of their limit, |
| // so we tick down our width and height by one float to make them exclusive. |
| auto ulp_before = [](float f) { |
| uint32_t bits; |
| memcpy(&bits, &f, 4); |
| bits--; |
| memcpy(&f, &bits, 4); |
| return f; |
| }; |
| auto limit_x = alloc->make<float>(ulp_before((float)pm. width())), |
| limit_y = alloc->make<float>(ulp_before((float)pm.height())); |
| |
| auto append_tiling_and_gather = [&] { |
| switch (fTileModeX) { |
| case kClamp_TileMode: p->append(SkRasterPipeline::clamp_x, limit_x); break; |
| case kMirror_TileMode: p->append(SkRasterPipeline::mirror_x, limit_x); break; |
| case kRepeat_TileMode: p->append(SkRasterPipeline::repeat_x, limit_x); break; |
| } |
| switch (fTileModeY) { |
| case kClamp_TileMode: p->append(SkRasterPipeline::clamp_y, limit_y); break; |
| case kMirror_TileMode: p->append(SkRasterPipeline::mirror_y, limit_y); break; |
| case kRepeat_TileMode: p->append(SkRasterPipeline::repeat_y, limit_y); break; |
| } |
| switch (info.colorType()) { |
| case kAlpha_8_SkColorType: p->append(SkRasterPipeline::gather_a8, gather); break; |
| case kIndex_8_SkColorType: p->append(SkRasterPipeline::gather_i8, gather); break; |
| case kGray_8_SkColorType: p->append(SkRasterPipeline::gather_g8, gather); break; |
| case kRGB_565_SkColorType: p->append(SkRasterPipeline::gather_565, gather); break; |
| case kARGB_4444_SkColorType: p->append(SkRasterPipeline::gather_4444, gather); break; |
| case kRGBA_8888_SkColorType: |
| case kBGRA_8888_SkColorType: p->append(SkRasterPipeline::gather_8888, gather); break; |
| case kRGBA_F16_SkColorType: p->append(SkRasterPipeline::gather_f16, gather); break; |
| default: SkASSERT(false); |
| } |
| if (info.gammaCloseToSRGB() && dstCS != nullptr) { |
| p->append_from_srgb(info.alphaType()); |
| } |
| }; |
| |
| SkJumper_SamplerCtx* sampler = nullptr; |
| if (quality != kNone_SkFilterQuality) { |
| sampler = alloc->make<SkJumper_SamplerCtx>(); |
| } |
| |
| auto sample = [&](SkRasterPipeline::StockStage setup_x, |
| SkRasterPipeline::StockStage setup_y) { |
| p->append(setup_x, sampler); |
| p->append(setup_y, sampler); |
| append_tiling_and_gather(); |
| p->append(SkRasterPipeline::accumulate, sampler); |
| }; |
| |
| if (quality == kNone_SkFilterQuality) { |
| append_tiling_and_gather(); |
| } else if (quality == kLow_SkFilterQuality) { |
| p->append(SkRasterPipeline::save_xy, sampler); |
| |
| sample(SkRasterPipeline::bilinear_nx, SkRasterPipeline::bilinear_ny); |
| sample(SkRasterPipeline::bilinear_px, SkRasterPipeline::bilinear_ny); |
| sample(SkRasterPipeline::bilinear_nx, SkRasterPipeline::bilinear_py); |
| sample(SkRasterPipeline::bilinear_px, SkRasterPipeline::bilinear_py); |
| |
| p->append(SkRasterPipeline::move_dst_src); |
| } else { |
| p->append(SkRasterPipeline::save_xy, sampler); |
| |
| sample(SkRasterPipeline::bicubic_n3x, SkRasterPipeline::bicubic_n3y); |
| sample(SkRasterPipeline::bicubic_n1x, SkRasterPipeline::bicubic_n3y); |
| sample(SkRasterPipeline::bicubic_p1x, SkRasterPipeline::bicubic_n3y); |
| sample(SkRasterPipeline::bicubic_p3x, SkRasterPipeline::bicubic_n3y); |
| |
| sample(SkRasterPipeline::bicubic_n3x, SkRasterPipeline::bicubic_n1y); |
| sample(SkRasterPipeline::bicubic_n1x, SkRasterPipeline::bicubic_n1y); |
| sample(SkRasterPipeline::bicubic_p1x, SkRasterPipeline::bicubic_n1y); |
| sample(SkRasterPipeline::bicubic_p3x, SkRasterPipeline::bicubic_n1y); |
| |
| sample(SkRasterPipeline::bicubic_n3x, SkRasterPipeline::bicubic_p1y); |
| sample(SkRasterPipeline::bicubic_n1x, SkRasterPipeline::bicubic_p1y); |
| sample(SkRasterPipeline::bicubic_p1x, SkRasterPipeline::bicubic_p1y); |
| sample(SkRasterPipeline::bicubic_p3x, SkRasterPipeline::bicubic_p1y); |
| |
| sample(SkRasterPipeline::bicubic_n3x, SkRasterPipeline::bicubic_p3y); |
| sample(SkRasterPipeline::bicubic_n1x, SkRasterPipeline::bicubic_p3y); |
| sample(SkRasterPipeline::bicubic_p1x, SkRasterPipeline::bicubic_p3y); |
| sample(SkRasterPipeline::bicubic_p3x, SkRasterPipeline::bicubic_p3y); |
| |
| p->append(SkRasterPipeline::move_dst_src); |
| } |
| |
| auto effective_color_type = [](SkColorType ct) { |
| return ct == kIndex_8_SkColorType ? kN32_SkColorType : ct; |
| }; |
| |
| if (effective_color_type(info.colorType()) == kBGRA_8888_SkColorType) { |
| p->append(SkRasterPipeline::swap_rb); |
| } |
| if (info.colorType() == kAlpha_8_SkColorType) { |
| p->append(SkRasterPipeline::set_rgb, &misc->paint_color); |
| } |
| if (info.colorType() == kAlpha_8_SkColorType || info.alphaType() == kUnpremul_SkAlphaType) { |
| p->append(SkRasterPipeline::premul); |
| } |
| if (quality > kLow_SkFilterQuality) { |
| // Bicubic filtering naturally produces out of range values on both sides. |
| p->append(SkRasterPipeline::clamp_0); |
| p->append(SkRasterPipeline::clamp_a); |
| } |
| append_gamut_transform(p, alloc, info.colorSpace(), dstCS, kPremul_SkAlphaType); |
| return true; |
| } |
