blob: 0dbc51e65f192f93b2052f0f3c401fba08142e3e [file] [log] [blame]
* 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 GrColorSpaceXform_DEFINED
#define GrColorSpaceXform_DEFINED
#include "include/core/SkRefCnt.h"
#include "src/core/SkColorSpacePriv.h"
#include "src/core/SkColorSpaceXformSteps.h"
#include "src/gpu/GrFragmentProcessor.h"
class GrColorInfo;
class SkColorSpace;
* Represents a color space transformation
class GrColorSpaceXform : public SkRefCnt {
GrColorSpaceXform(const SkColorSpaceXformSteps& steps) : fSteps(steps) {}
static sk_sp<GrColorSpaceXform> Make(SkColorSpace* src, SkAlphaType srcAT,
SkColorSpace* dst, SkAlphaType dstAT);
static sk_sp<GrColorSpaceXform> Make(const GrColorInfo& srcInfo, const GrColorInfo& dstInfo);
const SkColorSpaceXformSteps& steps() const { return fSteps; }
* GrGLSLFragmentProcessor::GenKey() must call this and include the returned value in its
* computed key.
static uint32_t XformKey(const GrColorSpaceXform* xform) {
// Code generation depends on which steps we apply,
// and the kinds of transfer functions (if we're applying those).
if (!xform) { return 0; }
const SkColorSpaceXformSteps& steps(xform->fSteps);
uint32_t key = steps.flags.mask();
if (steps.flags.linearize) {
key |= classify_transfer_fn(steps.srcTF) << 8;
if (steps.flags.encode) {
key |= classify_transfer_fn(steps.dstTFInv) << 16;
return key;
static bool Equals(const GrColorSpaceXform* a, const GrColorSpaceXform* b);
SkColor4f apply(const SkColor4f& srcColor);
friend class GrGLSLColorSpaceXformHelper;
SkColorSpaceXformSteps fSteps;
class GrColorSpaceXformEffect : public GrFragmentProcessor {
* Returns a fragment processor that calls the passed in fragment processor, and then converts
* the color space of the output from src to dst. If the child is null, fInputColor is used.
static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> child,
SkColorSpace* src, SkAlphaType srcAT,
SkColorSpace* dst, SkAlphaType dstAT);
static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> child,
const GrColorInfo& srcInfo,
const GrColorInfo& dstInfo);
* Returns a fragment processor that calls the passed in FP and then converts it with the given
* color xform. If the child is null, fInputColor is used. Returns child as-is if the xform is
* null (i.e. a no-op).
static std::unique_ptr<GrFragmentProcessor> Make(std::unique_ptr<GrFragmentProcessor> child,
sk_sp<GrColorSpaceXform> colorXform);
const char* name() const override { return "ColorSpaceXform"; }
std::unique_ptr<GrFragmentProcessor> clone() const override;
const GrColorSpaceXform* colorXform() const { return fColorXform.get(); }
GrColorSpaceXformEffect(std::unique_ptr<GrFragmentProcessor> child,
sk_sp<GrColorSpaceXform> colorXform);
GrColorSpaceXformEffect(const GrColorSpaceXformEffect& that);
static OptimizationFlags OptFlags(const GrFragmentProcessor* child);
SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& input) const override;
std::unique_ptr<GrGLSLFragmentProcessor> onMakeProgramImpl() const override;
void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
bool onIsEqual(const GrFragmentProcessor&) const override;
sk_sp<GrColorSpaceXform> fColorXform;
using INHERITED = GrFragmentProcessor;