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- /*
- * Copyright 2016 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef SkRasterPipeline_DEFINED
- #define SkRasterPipeline_DEFINED
- #include "include/core/SkColor.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkTypes.h"
- #include "include/private/SkNx.h"
- #include "include/private/SkTArray.h"
- #include "src/core/SkArenaAlloc.h"
- #include <functional>
- #include <vector> // TODO: unused
- /**
- * SkRasterPipeline provides a cheap way to chain together a pixel processing pipeline.
- *
- * It's particularly designed for situations where the potential pipeline is extremely
- * combinatoric: {N dst formats} x {M source formats} x {K mask formats} x {C transfer modes} ...
- * No one wants to write specialized routines for all those combinations, and if we did, we'd
- * end up bloating our code size dramatically. SkRasterPipeline stages can be chained together
- * at runtime, so we can scale this problem linearly rather than combinatorically.
- *
- * Each stage is represented by a function conforming to a common interface and by an
- * arbitrary context pointer. The stage funciton arguments and calling convention are
- * designed to maximize the amount of data we can pass along the pipeline cheaply, and
- * vary depending on CPU feature detection.
- */
- #define SK_RASTER_PIPELINE_STAGES(M) \
- M(callback) M(interpreter) \
- M(move_src_dst) M(move_dst_src) \
- M(clamp_0) M(clamp_1) M(clamp_a) M(clamp_gamut) \
- M(unpremul) M(premul) M(premul_dst) \
- M(force_opaque) M(force_opaque_dst) \
- M(set_rgb) M(unbounded_set_rgb) M(swap_rb) M(swap_rb_dst) \
- M(from_srgb) M(to_srgb) \
- M(black_color) M(white_color) M(uniform_color) M(unbounded_uniform_color) \
- M(seed_shader) M(dither) \
- M(load_a8) M(load_a8_dst) M(store_a8) M(gather_a8) \
- M(load_565) M(load_565_dst) M(store_565) M(gather_565) \
- M(load_4444) M(load_4444_dst) M(store_4444) M(gather_4444) \
- M(load_f16) M(load_f16_dst) M(store_f16) M(gather_f16) \
- M(load_af16) M(store_af16) \
- M(load_rgf16) M(store_rgf16) \
- M(load_f32) M(load_f32_dst) M(store_f32) M(gather_f32) \
- M(load_rgf32) M(store_rgf32) \
- M(load_8888) M(load_8888_dst) M(store_8888) M(gather_8888) \
- M(load_rg88) M(store_rg88) \
- M(load_a16) M(store_a16) \
- M(load_rg1616) M(store_rg1616) \
- M(load_16161616) M(store_16161616) \
- M(load_1010102) M(load_1010102_dst) M(store_1010102) M(gather_1010102) \
- M(alpha_to_gray) M(alpha_to_gray_dst) M(bt709_luminance_or_luma_to_alpha) \
- M(bilerp_clamp_8888) \
- M(store_u16_be) \
- M(load_src) M(store_src) M(load_dst) M(store_dst) \
- M(scale_u8) M(scale_565) M(scale_1_float) \
- M( lerp_u8) M( lerp_565) M( lerp_1_float) M(lerp_native) \
- M(dstatop) M(dstin) M(dstout) M(dstover) \
- M(srcatop) M(srcin) M(srcout) M(srcover) \
- M(clear) M(modulate) M(multiply) M(plus_) M(screen) M(xor_) \
- M(colorburn) M(colordodge) M(darken) M(difference) \
- M(exclusion) M(hardlight) M(lighten) M(overlay) M(softlight) \
- M(hue) M(saturation) M(color) M(luminosity) \
- M(srcover_rgba_8888) \
- M(matrix_translate) M(matrix_scale_translate) \
- M(matrix_2x3) M(matrix_3x3) M(matrix_3x4) M(matrix_4x5) M(matrix_4x3) \
- M(matrix_perspective) \
- M(parametric) M(gamma_) \
- M(mirror_x) M(repeat_x) \
- M(mirror_y) M(repeat_y) \
- M(decal_x) M(decal_y) M(decal_x_and_y) \
- M(check_decal_mask) \
- M(negate_x) \
- M(bilinear_nx) M(bilinear_px) M(bilinear_ny) M(bilinear_py) \
- M(bicubic_n3x) M(bicubic_n1x) M(bicubic_p1x) M(bicubic_p3x) \
- M(bicubic_n3y) M(bicubic_n1y) M(bicubic_p1y) M(bicubic_p3y) \
- M(save_xy) M(accumulate) \
- M(clamp_x_1) M(mirror_x_1) M(repeat_x_1) \
- M(evenly_spaced_gradient) \
- M(gradient) \
- M(evenly_spaced_2_stop_gradient) \
- M(xy_to_unit_angle) \
- M(xy_to_radius) \
- M(xy_to_2pt_conical_strip) \
- M(xy_to_2pt_conical_focal_on_circle) \
- M(xy_to_2pt_conical_well_behaved) \
- M(xy_to_2pt_conical_smaller) \
- M(xy_to_2pt_conical_greater) \
- M(alter_2pt_conical_compensate_focal) \
- M(alter_2pt_conical_unswap) \
- M(mask_2pt_conical_nan) \
- M(mask_2pt_conical_degenerates) M(apply_vector_mask) \
- M(byte_tables) \
- M(rgb_to_hsl) M(hsl_to_rgb) \
- M(gauss_a_to_rgba) \
- M(emboss) \
- M(swizzle)
- // The largest number of pixels we handle at a time.
- static const int SkRasterPipeline_kMaxStride = 16;
- // Structs representing the arguments to some common stages.
- struct SkRasterPipeline_MemoryCtx {
- void* pixels;
- int stride;
- };
- struct SkRasterPipeline_GatherCtx {
- const void* pixels;
- int stride;
- float width;
- float height;
- };
- // State shared by save_xy, accumulate, and bilinear_* / bicubic_*.
- struct SkRasterPipeline_SamplerCtx {
- float x[SkRasterPipeline_kMaxStride];
- float y[SkRasterPipeline_kMaxStride];
- float fx[SkRasterPipeline_kMaxStride];
- float fy[SkRasterPipeline_kMaxStride];
- float scalex[SkRasterPipeline_kMaxStride];
- float scaley[SkRasterPipeline_kMaxStride];
- };
- struct SkRasterPipeline_TileCtx {
- float scale;
- float invScale; // cache of 1/scale
- };
- struct SkRasterPipeline_DecalTileCtx {
- uint32_t mask[SkRasterPipeline_kMaxStride];
- float limit_x;
- float limit_y;
- };
- struct SkRasterPipeline_CallbackCtx {
- void (*fn)(SkRasterPipeline_CallbackCtx* self, int active_pixels/*<= SkRasterPipeline_kMaxStride*/);
- // When called, fn() will have our active pixels available in rgba.
- // When fn() returns, the pipeline will read back those active pixels from read_from.
- float rgba[4*SkRasterPipeline_kMaxStride];
- float* read_from = rgba;
- };
- namespace SkSL {
- struct ByteCode;
- struct ByteCodeFunction;
- }
- struct SkRasterPipeline_InterpreterCtx {
- const SkSL::ByteCode* byteCode;
- const SkSL::ByteCodeFunction* fn;
- SkColor4f paintColor;
- const void* inputs;
- int ninputs;
- bool shaderConvention; // if false, we're a colorfilter
- };
- struct SkRasterPipeline_GradientCtx {
- size_t stopCount;
- float* fs[4];
- float* bs[4];
- float* ts;
- bool interpolatedInPremul;
- };
- struct SkRasterPipeline_EvenlySpaced2StopGradientCtx {
- float f[4];
- float b[4];
- bool interpolatedInPremul;
- };
- struct SkRasterPipeline_2PtConicalCtx {
- uint32_t fMask[SkRasterPipeline_kMaxStride];
- float fP0,
- fP1;
- };
- struct SkRasterPipeline_UniformColorCtx {
- float r,g,b,a;
- uint16_t rgba[4]; // [0,255] in a 16-bit lane.
- };
- struct SkRasterPipeline_EmbossCtx {
- SkRasterPipeline_MemoryCtx mul,
- add;
- };
- class SkRasterPipeline {
- public:
- explicit SkRasterPipeline(SkArenaAlloc*);
- SkRasterPipeline(const SkRasterPipeline&) = delete;
- SkRasterPipeline(SkRasterPipeline&&) = default;
- SkRasterPipeline& operator=(const SkRasterPipeline&) = delete;
- SkRasterPipeline& operator=(SkRasterPipeline&&) = default;
- void reset();
- enum StockStage {
- #define M(stage) stage,
- SK_RASTER_PIPELINE_STAGES(M)
- #undef M
- };
- void append(StockStage, void* = nullptr);
- void append(StockStage stage, const void* ctx) { this->append(stage, const_cast<void*>(ctx)); }
- void append(StockStage, uintptr_t ctx);
- // For raw functions (i.e. from a JIT). Don't use this unless you know exactly what fn needs to
- // be. :)
- void append(void* fn, void* ctx);
- // Append all stages to this pipeline.
- void extend(const SkRasterPipeline&);
- // Runs the pipeline in 2d from (x,y) inclusive to (x+w,y+h) exclusive.
- void run(size_t x, size_t y, size_t w, size_t h) const;
- // Allocates a thunk which amortizes run() setup cost in alloc.
- std::function<void(size_t, size_t, size_t, size_t)> compile() const;
- void dump() const;
- // Appends a stage for the specified matrix.
- // Tries to optimize the stage by analyzing the type of matrix.
- void append_matrix(SkArenaAlloc*, const SkMatrix&);
- // Appends a stage for a constant uniform color.
- // Tries to optimize the stage based on the color.
- void append_constant_color(SkArenaAlloc*, const float rgba[4]);
- void append_constant_color(SkArenaAlloc* alloc, const SkColor4f& color) {
- this->append_constant_color(alloc, color.vec());
- }
- // Like append_constant_color() but only affecting r,g,b, ignoring the alpha channel.
- void append_set_rgb(SkArenaAlloc*, const float rgb[3]);
- void append_set_rgb(SkArenaAlloc* alloc, const SkColor4f& color) {
- this->append_set_rgb(alloc, color.vec());
- }
- void append_load (SkColorType, const SkRasterPipeline_MemoryCtx*);
- void append_load_dst(SkColorType, const SkRasterPipeline_MemoryCtx*);
- void append_store (SkColorType, const SkRasterPipeline_MemoryCtx*);
- void append_gamut_clamp_if_normalized(const SkImageInfo&);
- bool empty() const { return fStages == nullptr; }
- private:
- struct StageList {
- StageList* prev;
- uint64_t stage;
- void* ctx;
- bool rawFunction;
- };
- using StartPipelineFn = void(*)(size_t,size_t,size_t,size_t, void** program);
- StartPipelineFn build_pipeline(void**) const;
- void unchecked_append(StockStage, void*);
- // Used by old single-program void** style execution.
- SkArenaAlloc* fAlloc;
- StageList* fStages;
- int fNumStages;
- int fSlotsNeeded;
- };
- template <size_t bytes>
- class SkRasterPipeline_ : public SkRasterPipeline {
- public:
- SkRasterPipeline_()
- : SkRasterPipeline(&fBuiltinAlloc) {}
- private:
- SkSTArenaAlloc<bytes> fBuiltinAlloc;
- };
- #endif//SkRasterPipeline_DEFINED
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