| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkBlitter.h" |
| #include "SkColor.h" |
| #include "SkColorFilter.h" |
| #include "SkHalf.h" |
| #include "SkPM4f.h" |
| #include "SkRasterPipeline.h" |
| #include "SkShader.h" |
| #include "SkSRGB.h" |
| #include "SkXfermode.h" |
| |
| |
| class SkRasterPipelineBlitter : public SkBlitter { |
| public: |
| static SkBlitter* Create(const SkPixmap&, const SkPaint&, SkTBlitterAllocator*); |
| |
| SkRasterPipelineBlitter(SkPixmap dst, |
| SkRasterPipeline shader, |
| SkRasterPipeline colorFilter, |
| SkRasterPipeline xfermode, |
| SkPM4f paintColor) |
| : fDst(dst) |
| , fShader(shader) |
| , fColorFilter(colorFilter) |
| , fXfermode(xfermode) |
| , fPaintColor(paintColor) |
| {} |
| |
| void blitH (int x, int y, int w) override; |
| void blitAntiH(int x, int y, const SkAlpha[], const int16_t[]) override; |
| void blitMask (const SkMask&, const SkIRect& clip) override; |
| |
| // TODO: The default implementations of the other blits look fine, |
| // but some of them like blitV could probably benefit from custom |
| // blits using something like a SkRasterPipeline::runFew() method. |
| |
| private: |
| void append_load_d(SkRasterPipeline*, const void*) const; |
| void append_store (SkRasterPipeline*, void*) const; |
| |
| SkPixmap fDst; |
| SkRasterPipeline fShader, fColorFilter, fXfermode; |
| SkPM4f fPaintColor; |
| |
| typedef SkBlitter INHERITED; |
| }; |
| |
| SkBlitter* SkCreateRasterPipelineBlitter(const SkPixmap& dst, |
| const SkPaint& paint, |
| SkTBlitterAllocator* alloc) { |
| return SkRasterPipelineBlitter::Create(dst, paint, alloc); |
| } |
| |
| // Clamp colors into [0,1] premul (e.g. just before storing back to memory). |
| SK_RASTER_STAGE(clamp_01_premul) { |
| a = Sk4f::Max(a, 0.0f); |
| r = Sk4f::Max(r, 0.0f); |
| g = Sk4f::Max(g, 0.0f); |
| b = Sk4f::Max(b, 0.0f); |
| |
| a = Sk4f::Min(a, 1.0f); |
| r = Sk4f::Min(r, a); |
| g = Sk4f::Min(g, a); |
| b = Sk4f::Min(b, a); |
| } |
| |
| // The default shader produces a constant color (from the SkPaint). |
| SK_RASTER_STAGE(constant_color) { |
| auto color = (const SkPM4f*)ctx; |
| r = color->r(); |
| g = color->g(); |
| b = color->b(); |
| a = color->a(); |
| } |
| |
| // The default transfer mode is srcover, s' = s + d*(1-sa). |
| SK_RASTER_STAGE(srcover) { |
| r += dr*(1.0f - a); |
| g += dg*(1.0f - a); |
| b += db*(1.0f - a); |
| a += da*(1.0f - a); |
| } |
| |
| static Sk4f lerp(const Sk4f& from, const Sk4f& to, const Sk4f& cov) { |
| return from + (to-from)*cov; |
| } |
| |
| // s' = d(1-c) + sc, for a constant c. |
| SK_RASTER_STAGE(lerp_constant_float) { |
| Sk4f c = *(const float*)ctx; |
| |
| r = lerp(dr, r, c); |
| g = lerp(dg, g, c); |
| b = lerp(db, b, c); |
| a = lerp(da, a, c); |
| } |
| |
| // s' = d(1-c) + sc, 4 pixels at a time for 8-bit coverage. |
| SK_RASTER_STAGE(lerp_a8) { |
| auto ptr = (const uint8_t*)ctx + x; |
| Sk4f c = SkNx_cast<float>(Sk4b::Load(ptr)) * (1/255.0f); |
| |
| r = lerp(dr, r, c); |
| g = lerp(dg, g, c); |
| b = lerp(db, b, c); |
| a = lerp(da, a, c); |
| } |
| |
| // Tail variant of lerp_a8() handling 1 pixel at a time. |
| SK_RASTER_STAGE(lerp_a8_1) { |
| auto ptr = (const uint8_t*)ctx + x; |
| Sk4f c = *ptr * (1/255.0f); |
| |
| r = lerp(dr, r, c); |
| g = lerp(dg, g, c); |
| b = lerp(db, b, c); |
| a = lerp(da, a, c); |
| } |
| |
| static void from_565(const Sk4h& _565, Sk4f* r, Sk4f* g, Sk4f* b) { |
| Sk4i _32_bit = SkNx_cast<int>(_565); |
| |
| *r = SkNx_cast<float>(_32_bit & SK_R16_MASK_IN_PLACE) * (1.0f / SK_R16_MASK_IN_PLACE); |
| *g = SkNx_cast<float>(_32_bit & SK_G16_MASK_IN_PLACE) * (1.0f / SK_G16_MASK_IN_PLACE); |
| *b = SkNx_cast<float>(_32_bit & SK_B16_MASK_IN_PLACE) * (1.0f / SK_B16_MASK_IN_PLACE); |
| } |
| |
| static Sk4h to_565(const Sk4f& r, const Sk4f& g, const Sk4f& b) { |
| return SkNx_cast<uint16_t>( Sk4f_round(r * SK_R16_MASK) << SK_R16_SHIFT |
| | Sk4f_round(g * SK_G16_MASK) << SK_G16_SHIFT |
| | Sk4f_round(b * SK_B16_MASK) << SK_B16_SHIFT); |
| } |
| |
| // s' = d(1-c) + sc, 4 pixels at a time for 565 coverage. |
| SK_RASTER_STAGE(lerp_lcd16) { |
| auto ptr = (const uint16_t*)ctx + x; |
| Sk4f cr, cg, cb; |
| from_565(Sk4h::Load(ptr), &cr, &cg, &cb); |
| |
| r = lerp(dr, r, cr); |
| g = lerp(dg, g, cg); |
| b = lerp(db, b, cb); |
| a = 1.0f; |
| } |
| |
| // Tail variant of lerp_lcd16() handling 1 pixel at a time. |
| SK_RASTER_STAGE(lerp_lcd16_1) { |
| auto ptr = (const uint16_t*)ctx + x; |
| Sk4f cr, cg, cb; |
| from_565({*ptr,0,0,0}, &cr, &cg, &cb); |
| |
| r = lerp(dr, r, cr); |
| g = lerp(dg, g, cg); |
| b = lerp(db, b, cb); |
| a = 1.0f; |
| } |
| |
| // Load 4 565 dst pixels. |
| SK_RASTER_STAGE(load_d_565) { |
| auto ptr = (const uint16_t*)ctx + x; |
| |
| from_565(Sk4h::Load(ptr), &dr,&dg,&db); |
| da = 1.0f; |
| } |
| |
| // Load 1 565 dst pixel. |
| SK_RASTER_STAGE(load_d_565_1) { |
| auto ptr = (const uint16_t*)ctx + x; |
| |
| from_565({*ptr,0,0,0}, &dr,&dg,&db); |
| da = 1.0f; |
| } |
| |
| // Store 4 565 pixels. |
| SK_RASTER_STAGE(store_565) { |
| auto ptr = (uint16_t*)ctx + x; |
| to_565(r,g,b).store(ptr); |
| } |
| |
| // Store 1 565 pixel. |
| SK_RASTER_STAGE(store_565_1) { |
| auto ptr = (uint16_t*)ctx + x; |
| *ptr = to_565(r,g,b)[0]; |
| } |
| |
| // Load 4 F16 pixels. |
| SK_RASTER_STAGE(load_d_f16) { |
| auto ptr = (const uint64_t*)ctx + x; |
| |
| Sk4h rh, gh, bh, ah; |
| Sk4h_load4(ptr, &rh, &gh, &bh, &ah); |
| |
| dr = SkHalfToFloat_finite_ftz(rh); |
| dg = SkHalfToFloat_finite_ftz(gh); |
| db = SkHalfToFloat_finite_ftz(bh); |
| da = SkHalfToFloat_finite_ftz(ah); |
| } |
| |
| // Load 1 F16 pixel. |
| SK_RASTER_STAGE(load_d_f16_1) { |
| auto ptr = (const uint64_t*)ctx + x; |
| |
| auto p0 = SkHalfToFloat_finite_ftz(ptr[0]); |
| dr = { p0[0],0,0,0 }; |
| dg = { p0[1],0,0,0 }; |
| db = { p0[2],0,0,0 }; |
| da = { p0[3],0,0,0 }; |
| } |
| |
| // Store 4 F16 pixels. |
| SK_RASTER_STAGE(store_f16) { |
| auto ptr = (uint64_t*)ctx + x; |
| |
| Sk4h_store4(ptr, SkFloatToHalf_finite_ftz(r), SkFloatToHalf_finite_ftz(g), |
| SkFloatToHalf_finite_ftz(b), SkFloatToHalf_finite_ftz(a)); |
| } |
| |
| // Store 1 F16 pixel. |
| SK_RASTER_STAGE(store_f16_1) { |
| auto ptr = (uint64_t*)ctx + x; |
| |
| SkFloatToHalf_finite_ftz({r[0], g[0], b[0], a[0]}).store(ptr); |
| } |
| |
| // Load 4 8-bit sRGB pixels from SkPMColor order to RGBA. |
| SK_RASTER_STAGE(load_d_srgb) { |
| auto ptr = (const uint32_t*)ctx + x; |
| |
| dr = { sk_linear_from_srgb[(ptr[0] >> SK_R32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[1] >> SK_R32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[2] >> SK_R32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[3] >> SK_R32_SHIFT) & 0xff] }; |
| |
| dg = { sk_linear_from_srgb[(ptr[0] >> SK_G32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[1] >> SK_G32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[2] >> SK_G32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[3] >> SK_G32_SHIFT) & 0xff] }; |
| |
| db = { sk_linear_from_srgb[(ptr[0] >> SK_B32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[1] >> SK_B32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[2] >> SK_B32_SHIFT) & 0xff], |
| sk_linear_from_srgb[(ptr[3] >> SK_B32_SHIFT) & 0xff] }; |
| |
| da = SkNx_cast<float>(Sk4u::Load(ptr) >> SK_A32_SHIFT) * (1/255.0f); |
| } |
| |
| // Tail variant of load_d_srgb() handling 1 pixel at a time. |
| SK_RASTER_STAGE(load_d_srgb_1) { |
| auto ptr = (const uint32_t*)ctx + x; |
| |
| dr = { sk_linear_from_srgb[(*ptr >> SK_R32_SHIFT) & 0xff], 0,0,0 }; |
| dg = { sk_linear_from_srgb[(*ptr >> SK_G32_SHIFT) & 0xff], 0,0,0 }; |
| db = { sk_linear_from_srgb[(*ptr >> SK_B32_SHIFT) & 0xff], 0,0,0 }; |
| da = { (1/255.0f) * (*ptr >> SK_A32_SHIFT) , 0,0,0 }; |
| } |
| |
| // Write out 4 pixels as 8-bit SkPMColor-order sRGB. |
| SK_RASTER_STAGE(store_srgb) { |
| auto ptr = (uint32_t*)ctx + x; |
| ( sk_linear_to_srgb_noclamp(r) << SK_R32_SHIFT |
| | sk_linear_to_srgb_noclamp(g) << SK_G32_SHIFT |
| | sk_linear_to_srgb_noclamp(b) << SK_B32_SHIFT |
| | Sk4f_round(255.0f * a) << SK_A32_SHIFT).store(ptr); |
| } |
| |
| // Tail variant of store_srgb() handling 1 pixel at a time. |
| SK_RASTER_STAGE(store_srgb_1) { |
| auto ptr = (uint32_t*)ctx + x; |
| Sk4i rgb = sk_linear_to_srgb_noclamp(swizzle_rb_if_bgra({ r[0], g[0], b[0], 0.0f })); |
| |
| uint32_t rgba; |
| SkNx_cast<uint8_t>(rgb).store(&rgba); |
| rgba |= (uint32_t)(255.0f * a[0] + 0.5f) << 24; |
| *ptr = rgba; |
| } |
| |
| static bool supported(const SkImageInfo& info) { |
| switch (info.colorType()) { |
| case kN32_SkColorType: return info.gammaCloseToSRGB(); |
| case kRGBA_F16_SkColorType: return true; |
| case kRGB_565_SkColorType: return true; |
| default: return false; |
| } |
| } |
| |
| template <typename Effect> |
| static bool append_effect_stages(const Effect* effect, SkRasterPipeline* pipeline) { |
| return !effect || effect->appendStages(pipeline); |
| } |
| |
| |
| SkBlitter* SkRasterPipelineBlitter::Create(const SkPixmap& dst, |
| const SkPaint& paint, |
| SkTBlitterAllocator* alloc) { |
| if (!supported(dst.info())) { |
| return nullptr; |
| } |
| if (paint.getShader()) { |
| return nullptr; // TODO: need to work out how shaders and their contexts work |
| } |
| |
| SkRasterPipeline shader, colorFilter, xfermode; |
| if (!append_effect_stages(paint.getColorFilter(), &colorFilter) || |
| !append_effect_stages(paint.getXfermode(), &xfermode )) { |
| return nullptr; |
| } |
| |
| uint32_t paintColor = paint.getColor(); |
| |
| SkColor4f color; |
| if (SkImageInfoIsGammaCorrect(dst.info())) { |
| color = SkColor4f::FromColor(paintColor); |
| } else { |
| swizzle_rb(SkNx_cast<float>(Sk4b::Load(&paintColor)) * (1/255.0f)).store(&color); |
| } |
| |
| auto blitter = alloc->createT<SkRasterPipelineBlitter>( |
| dst, |
| shader, colorFilter, xfermode, |
| color.premul()); |
| |
| if (!paint.getShader()) { |
| blitter->fShader.append<constant_color>(&blitter->fPaintColor); |
| } |
| if (!paint.getXfermode()) { |
| blitter->fXfermode.append<srcover>(); |
| } |
| |
| return blitter; |
| } |
| |
| void SkRasterPipelineBlitter::append_load_d(SkRasterPipeline* p, const void* dst) const { |
| SkASSERT(supported(fDst.info())); |
| |
| switch (fDst.info().colorType()) { |
| case kN32_SkColorType: |
| if (fDst.info().gammaCloseToSRGB()) { |
| p->append<load_d_srgb, load_d_srgb_1>(dst); |
| } |
| break; |
| case kRGBA_F16_SkColorType: |
| p->append<load_d_f16, load_d_f16_1>(dst); |
| break; |
| case kRGB_565_SkColorType: |
| p->append<load_d_565, load_d_565_1>(dst); |
| break; |
| default: break; |
| } |
| } |
| |
| void SkRasterPipelineBlitter::append_store(SkRasterPipeline* p, void* dst) const { |
| SkASSERT(supported(fDst.info())); |
| |
| p->append<clamp_01_premul>(); |
| switch (fDst.info().colorType()) { |
| case kN32_SkColorType: |
| if (fDst.info().gammaCloseToSRGB()) { |
| p->append<store_srgb, store_srgb_1>(dst); |
| } |
| break; |
| case kRGBA_F16_SkColorType: |
| p->append<store_f16, store_f16_1>(dst); |
| break; |
| case kRGB_565_SkColorType: |
| p->append<store_565, store_565_1>(dst); |
| break; |
| default: break; |
| } |
| } |
| |
| void SkRasterPipelineBlitter::blitH(int x, int y, int w) { |
| auto dst = fDst.writable_addr(0,y); |
| |
| SkRasterPipeline p; |
| p.extend(fShader); |
| p.extend(fColorFilter); |
| this->append_load_d(&p, dst); |
| p.extend(fXfermode); |
| this->append_store(&p, dst); |
| |
| p.run(x, w); |
| } |
| |
| void SkRasterPipelineBlitter::blitAntiH(int x, int y, const SkAlpha aa[], const int16_t runs[]) { |
| auto dst = fDst.writable_addr(0,y); |
| float coverage; |
| |
| SkRasterPipeline p; |
| p.extend(fShader); |
| p.extend(fColorFilter); |
| this->append_load_d(&p, dst); |
| p.extend(fXfermode); |
| p.append<lerp_constant_float>(&coverage); |
| this->append_store(&p, dst); |
| |
| for (int16_t run = *runs; run > 0; run = *runs) { |
| coverage = *aa * (1/255.0f); |
| p.run(x, run); |
| |
| x += run; |
| runs += run; |
| aa += run; |
| } |
| } |
| |
| void SkRasterPipelineBlitter::blitMask(const SkMask& mask, const SkIRect& clip) { |
| if (mask.fFormat == SkMask::kBW_Format) { |
| // TODO: native BW masks? |
| return INHERITED::blitMask(mask, clip); |
| } |
| |
| int x = clip.left(); |
| for (int y = clip.top(); y < clip.bottom(); y++) { |
| auto dst = fDst.writable_addr(0,y); |
| |
| SkRasterPipeline p; |
| p.extend(fShader); |
| p.extend(fColorFilter); |
| this->append_load_d(&p, dst); |
| p.extend(fXfermode); |
| switch (mask.fFormat) { |
| case SkMask::kA8_Format: |
| p.append<lerp_a8, lerp_a8_1>(mask.getAddr8(x,y)-x); |
| break; |
| case SkMask::kLCD16_Format: |
| p.append<lerp_lcd16, lerp_lcd16_1>(mask.getAddrLCD16(x,y)-x); |
| break; |
| default: break; |
| } |
| this->append_store(&p, dst); |
| |
| p.run(x, clip.width()); |
| } |
| } |
