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* Copyright 2017 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#ifndef SkJumper_DEFINED
#define SkJumper_DEFINED
#include <stddef.h>
#include <stdint.h>
// This file contains definitions shared by SkJumper.cpp (compiled normally as part of Skia)
// and SkJumper_stages.cpp (compiled into Skia _and_ offline into SkJumper_generated.h).
// Keep it simple!
// Externally facing functions (start_pipeline) are called a little specially on Windows.
#if defined(JUMPER_IS_OFFLINE) && defined(WIN) && defined(__x86_64__)
#define MAYBE_MSABI __attribute__((ms_abi)) // Use MS' ABI, not System V.
#elif defined(JUMPER_IS_OFFLINE) && defined(WIN) && defined(__i386__)
#define MAYBE_MSABI __attribute__((force_align_arg_pointer)) // Re-align stack 4 -> 16 bytes.
// Any custom ABI to use for all non-externally-facing stage functions.
#if defined(__ARM_NEON) && defined(__arm__)
// This lets us pass vectors more efficiently on 32-bit ARM.
#define ABI __attribute__((pcs("aapcs-vfp")))
#define ABI
// On ARM we expect that you're using Clang if you want SkJumper to be fast.
// If you are, the baseline float stages will use NEON, and lowp stages will
// also be available. (If somehow you're building for ARM not using Clang,
// you'll get scalar baseline stages and no lowp support.)
#if defined(__clang__) && defined(__ARM_NEON)
static const int SkJumper_kMaxStride = 16;
struct SkJumper_MemoryCtx {
void* pixels;
int stride;
struct SkJumper_GatherCtx {
const void* pixels;
int stride;
float width;
float height;
// State shared by save_xy, accumulate, and bilinear_* / bicubic_*.
struct SkJumper_SamplerCtx {
float x[SkJumper_kMaxStride];
float y[SkJumper_kMaxStride];
float fx[SkJumper_kMaxStride];
float fy[SkJumper_kMaxStride];
float scalex[SkJumper_kMaxStride];
float scaley[SkJumper_kMaxStride];
struct SkJumper_TileCtx {
float scale;
float invScale; // cache of 1/scale
struct SkJumper_CallbackCtx {
MAYBE_MSABI void (*fn)(SkJumper_CallbackCtx* self, int active_pixels/*<= SkJumper_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*SkJumper_kMaxStride];
float* read_from = rgba;
struct SkJumper_LoadTablesCtx {
const void* src;
const float *r, *g, *b;
struct SkJumper_TableCtx {
const float* table;
int size;
// This should line up with the memory layout of SkColorSpaceTransferFn.
struct SkJumper_ParametricTransferFunction {
float G, A,B,C,D,E,F;
struct SkJumper_GradientCtx {
size_t stopCount;
float* fs[4];
float* bs[4];
float* ts;
struct SkJumper_2PtConicalCtx {
uint32_t fMask[SkJumper_kMaxStride];
float fP0,
struct SkJumper_UniformColorCtx {
float r,g,b,a;
uint16_t rgba[4]; // [0,255] in a 16-bit lane.
struct SkJumper_ColorLookupTableCtx {
const float* table;
int limits[4];