/* * 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 "SkRasterPipeline.h" #include "SkOpts.h" #include SkRasterPipeline::SkRasterPipeline(SkArenaAlloc* alloc) : fAlloc(alloc) { this->reset(); } void SkRasterPipeline::reset() { fStages = nullptr; fNumStages = 0; fSlotsNeeded = 1; // We always need one extra slot for just_return(). } void SkRasterPipeline::append(StockStage stage, void* ctx) { SkASSERT(stage != uniform_color); // Please use append_constant_color(). SkASSERT(stage != unbounded_uniform_color); // Please use append_constant_color(). SkASSERT(stage != set_rgb); // Please use append_set_rgb(). SkASSERT(stage != unbounded_set_rgb); // Please use append_set_rgb(). SkASSERT(stage != clamp_gamut); // Please use append_gamut_clamp_if_normalized(). this->unchecked_append(stage, ctx); } void SkRasterPipeline::unchecked_append(StockStage stage, void* ctx) { fStages = fAlloc->make( StageList{fStages, (uint64_t) stage, ctx, false} ); fNumStages += 1; fSlotsNeeded += ctx ? 2 : 1; } void SkRasterPipeline::append(void* fn, void* ctx) { fStages = fAlloc->make( StageList{fStages, (uint64_t) fn, ctx, true} ); fNumStages += 1; fSlotsNeeded += ctx ? 2 : 1; } void SkRasterPipeline::extend(const SkRasterPipeline& src) { if (src.empty()) { return; } auto stages = fAlloc->makeArrayDefault(src.fNumStages); int n = src.fNumStages; const StageList* st = src.fStages; while (n --> 1) { stages[n] = *st; stages[n].prev = &stages[n-1]; st = st->prev; } stages[0] = *st; stages[0].prev = fStages; fStages = &stages[src.fNumStages - 1]; fNumStages += src.fNumStages; fSlotsNeeded += src.fSlotsNeeded - 1; // Don't double count just_returns(). } void SkRasterPipeline::dump() const { SkDebugf("SkRasterPipeline, %d stages\n", fNumStages); std::vector stages; for (auto st = fStages; st; st = st->prev) { const char* name = ""; switch (st->stage) { #define M(x) case x: name = #x; break; SK_RASTER_PIPELINE_STAGES(M) #undef M } stages.push_back(name); } std::reverse(stages.begin(), stages.end()); for (const char* name : stages) { SkDebugf("\t%s\n", name); } SkDebugf("\n"); } void SkRasterPipeline::append_set_rgb(SkArenaAlloc* alloc, const float rgb[3]) { auto arg = alloc->makeArrayDefault(3); arg[0] = rgb[0]; arg[1] = rgb[1]; arg[2] = rgb[2]; auto stage = unbounded_set_rgb; if (0 <= rgb[0] && rgb[0] <= 1 && 0 <= rgb[1] && rgb[1] <= 1 && 0 <= rgb[2] && rgb[2] <= 1) { stage = set_rgb; } this->unchecked_append(stage, arg); } void SkRasterPipeline::append_constant_color(SkArenaAlloc* alloc, const float rgba[4]) { // r,g,b might be outside [0,1], but alpha should probably always be in [0,1]. SkASSERT(0 <= rgba[3] && rgba[3] <= 1); if (rgba[0] == 0 && rgba[1] == 0 && rgba[2] == 0 && rgba[3] == 1) { this->append(black_color); } else if (rgba[0] == 1 && rgba[1] == 1 && rgba[2] == 1 && rgba[3] == 1) { this->append(white_color); } else { auto ctx = alloc->make(); Sk4f color = Sk4f::Load(rgba); color.store(&ctx->r); // uniform_color requires colors in range and can go lowp, // while unbounded_uniform_color supports out-of-range colors too but not lowp. if (0 <= rgba[0] && rgba[0] <= rgba[3] && 0 <= rgba[1] && rgba[1] <= rgba[3] && 0 <= rgba[2] && rgba[2] <= rgba[3]) { // To make loads more direct, we store 8-bit values in 16-bit slots. color = color * 255.0f + 0.5f; ctx->rgba[0] = (uint16_t)color[0]; ctx->rgba[1] = (uint16_t)color[1]; ctx->rgba[2] = (uint16_t)color[2]; ctx->rgba[3] = (uint16_t)color[3]; this->unchecked_append(uniform_color, ctx); } else { this->unchecked_append(unbounded_uniform_color, ctx); } } } void SkRasterPipeline::append_matrix(SkArenaAlloc* alloc, const SkMatrix& matrix) { SkMatrix::TypeMask mt = matrix.getType(); if (mt == SkMatrix::kIdentity_Mask) { return; } if (mt == SkMatrix::kTranslate_Mask) { float* trans = alloc->makeArrayDefault(2); trans[0] = matrix.getTranslateX(); trans[1] = matrix.getTranslateY(); this->append(SkRasterPipeline::matrix_translate, trans); } else if ((mt | (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)) == (SkMatrix::kScale_Mask | SkMatrix::kTranslate_Mask)) { float* scaleTrans = alloc->makeArrayDefault(4); scaleTrans[0] = matrix.getScaleX(); scaleTrans[1] = matrix.getScaleY(); scaleTrans[2] = matrix.getTranslateX(); scaleTrans[3] = matrix.getTranslateY(); this->append(SkRasterPipeline::matrix_scale_translate, scaleTrans); } else { float* storage = alloc->makeArrayDefault(9); if (matrix.asAffine(storage)) { // note: asAffine and the 2x3 stage really only need 6 entries this->append(SkRasterPipeline::matrix_2x3, storage); } else { matrix.get9(storage); this->append(SkRasterPipeline::matrix_perspective, storage); } } } void SkRasterPipeline::append_load(SkColorType ct, const SkRasterPipeline_MemoryCtx* ctx) { switch (ct) { case kUnknown_SkColorType: SkASSERT(false); break; case kAlpha_8_SkColorType: this->append(load_a8, ctx); break; case kRGB_565_SkColorType: this->append(load_565, ctx); break; case kARGB_4444_SkColorType: this->append(load_4444, ctx); break; case kRGBA_8888_SkColorType: this->append(load_8888, ctx); break; case kRGBA_1010102_SkColorType: this->append(load_1010102, ctx); break; case kRGBA_F16_SkColorType: this->append(load_f16, ctx); break; case kRGBA_F32_SkColorType: this->append(load_f32, ctx); break; case kGray_8_SkColorType: this->append(load_a8, ctx); this->append(alpha_to_gray); break; case kRGB_888x_SkColorType: this->append(load_8888, ctx); this->append(force_opaque); break; case kRGB_101010x_SkColorType: this->append(load_1010102, ctx); this->append(force_opaque); break; case kBGRA_8888_SkColorType: this->append(load_8888, ctx); this->append(swap_rb); break; } } void SkRasterPipeline::append_load_dst(SkColorType ct, const SkRasterPipeline_MemoryCtx* ctx) { switch (ct) { case kUnknown_SkColorType: SkASSERT(false); break; case kAlpha_8_SkColorType: this->append(load_a8_dst, ctx); break; case kRGB_565_SkColorType: this->append(load_565_dst, ctx); break; case kARGB_4444_SkColorType: this->append(load_4444_dst, ctx); break; case kRGBA_8888_SkColorType: this->append(load_8888_dst, ctx); break; case kRGBA_1010102_SkColorType: this->append(load_1010102_dst, ctx); break; case kRGBA_F16_SkColorType: this->append(load_f16_dst, ctx); break; case kRGBA_F32_SkColorType: this->append(load_f32_dst, ctx); break; case kGray_8_SkColorType: this->append(load_a8_dst, ctx); this->append(alpha_to_gray_dst); break; case kRGB_888x_SkColorType: this->append(load_8888_dst, ctx); this->append(force_opaque_dst); break; case kRGB_101010x_SkColorType: this->append(load_1010102_dst, ctx); this->append(force_opaque_dst); break; case kBGRA_8888_SkColorType: this->append(load_8888_dst, ctx); this->append(swap_rb_dst); break; } } void SkRasterPipeline::append_store(SkColorType ct, const SkRasterPipeline_MemoryCtx* ctx) { switch (ct) { case kUnknown_SkColorType: SkASSERT(false); break; case kAlpha_8_SkColorType: this->append(store_a8, ctx); break; case kRGB_565_SkColorType: this->append(store_565, ctx); break; case kARGB_4444_SkColorType: this->append(store_4444, ctx); break; case kRGBA_8888_SkColorType: this->append(store_8888, ctx); break; case kRGBA_1010102_SkColorType: this->append(store_1010102, ctx); break; case kRGBA_F16_SkColorType: this->append(store_f16, ctx); break; case kRGBA_F32_SkColorType: this->append(store_f32, ctx); break; case kRGB_888x_SkColorType: this->append(force_opaque); this->append(store_8888, ctx); break; case kRGB_101010x_SkColorType: this->append(force_opaque); this->append(store_1010102, ctx); break; case kGray_8_SkColorType: this->append(luminance_to_alpha); this->append(store_a8, ctx); break; case kBGRA_8888_SkColorType: this->append(swap_rb); this->append(store_8888, ctx); break; } } void SkRasterPipeline::append_gamut_clamp_if_normalized(const SkImageInfo& dstInfo) { if (dstInfo.colorType() != kRGBA_F16_SkColorType && dstInfo.colorType() != kRGBA_F32_SkColorType && dstInfo.alphaType() == kPremul_SkAlphaType) { this->unchecked_append(SkRasterPipeline::clamp_gamut, nullptr); } } SkRasterPipeline::StartPipelineFn SkRasterPipeline::build_pipeline(void** ip) const { // We'll try to build a lowp pipeline, but if that fails fallback to a highp float pipeline. void** reset_point = ip; // Stages are stored backwards in fStages, so we reverse here, back to front. *--ip = (void*)SkOpts::just_return_lowp; for (const StageList* st = fStages; st; st = st->prev) { SkOpts::StageFn fn; if (!st->rawFunction && (fn = SkOpts::stages_lowp[st->stage])) { if (st->ctx) { *--ip = st->ctx; } *--ip = (void*)fn; } else { ip = reset_point; break; } } if (ip != reset_point) { return SkOpts::start_pipeline_lowp; } *--ip = (void*)SkOpts::just_return_highp; for (const StageList* st = fStages; st; st = st->prev) { if (st->ctx) { *--ip = st->ctx; } if (st->rawFunction) { *--ip = (void*)st->stage; } else { *--ip = (void*)SkOpts::stages_highp[st->stage]; } } return SkOpts::start_pipeline_highp; } void SkRasterPipeline::run(size_t x, size_t y, size_t w, size_t h) const { if (this->empty()) { return; } // Best to not use fAlloc here... we can't bound how often run() will be called. SkAutoSTMalloc<64, void*> program(fSlotsNeeded); auto start_pipeline = this->build_pipeline(program.get() + fSlotsNeeded); start_pipeline(x,y,x+w,y+h, program.get()); } std::function SkRasterPipeline::compile() const { if (this->empty()) { return [](size_t, size_t, size_t, size_t) {}; } void** program = fAlloc->makeArray(fSlotsNeeded); auto start_pipeline = this->build_pipeline(program + fSlotsNeeded); return [=](size_t x, size_t y, size_t w, size_t h) { start_pipeline(x,y,x+w,y+h, program); }; }