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/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkData.h"
#include "include/core/SkPixelRef.h"
#include "include/gpu/GrContext.h"
#include "include/gpu/GrTypes.h"
#include "include/private/GrRecordingContext.h"
#include "include/private/SkImageInfoPriv.h"
#include "include/private/SkTemplates.h"
#include "src/core/SkAutoMalloc.h"
#include "src/core/SkBlendModePriv.h"
#include "src/core/SkImagePriv.h"
#include "src/core/SkMaskFilterBase.h"
#include "src/core/SkMessageBus.h"
#include "src/core/SkMipMap.h"
#include "src/core/SkPaintPriv.h"
#include "src/core/SkResourceCache.h"
#include "src/core/SkTraceEvent.h"
#include "src/gpu/GrBitmapTextureMaker.h"
#include "src/gpu/GrCaps.h"
#include "src/gpu/GrColorSpaceXform.h"
#include "src/gpu/GrContextPriv.h"
#include "src/gpu/GrGpuResourcePriv.h"
#include "src/gpu/GrPaint.h"
#include "src/gpu/GrProxyProvider.h"
#include "src/gpu/GrRecordingContextPriv.h"
#include "src/gpu/GrTextureProxy.h"
#include "src/gpu/GrXferProcessor.h"
#include "src/gpu/SkGr.h"
#include "src/gpu/effects/GrBicubicEffect.h"
#include "src/gpu/effects/GrPorterDuffXferProcessor.h"
#include "src/gpu/effects/GrSkSLFP.h"
#include "src/gpu/effects/GrXfermodeFragmentProcessor.h"
#include "src/gpu/effects/generated/GrConstColorProcessor.h"
#include "src/image/SkImage_Base.h"
#include "src/shaders/SkShaderBase.h"
#if SK_SUPPORT_GPU
GR_FP_SRC_STRING SKSL_DITHER_SRC = R"(
// This controls the range of values added to color channels
layout(key) in int rangeType;
void main(float x, float y, inout half4 color) {
half value;
half range;
@switch (rangeType) {
case 0:
range = 1.0 / 255.0;
break;
case 1:
range = 1.0 / 63.0;
break;
default:
// Experimentally this looks better than the expected value of 1/15.
range = 1.0 / 15.0;
break;
}
@if (sk_Caps.integerSupport) {
// This ordered-dither code is lifted from the cpu backend.
uint x = uint(x);
uint y = uint(y);
uint m = (y & 1) << 5 | (x & 1) << 4 |
(y & 2) << 2 | (x & 2) << 1 |
(y & 4) >> 1 | (x & 4) >> 2;
value = half(m) * 1.0 / 64.0 - 63.0 / 128.0;
} else {
// Simulate the integer effect used above using step/mod. For speed, simulates a 4x4
// dither pattern rather than an 8x8 one.
half4 modValues = mod(half4(half(x), half(y), half(x), half(y)), half4(2.0, 2.0, 4.0, 4.0));
half4 stepValues = step(modValues, half4(1.0, 1.0, 2.0, 2.0));
value = dot(stepValues, half4(8.0 / 16.0, 4.0 / 16.0, 2.0 / 16.0, 1.0 / 16.0)) - 15.0 / 32.0;
}
// For each color channel, add the random offset to the channel value and then clamp
// between 0 and alpha to keep the color premultiplied.
color = half4(clamp(color.rgb + value * range, 0.0, color.a), color.a);
}
)";
#endif
GrSurfaceDesc GrImageInfoToSurfaceDesc(const SkImageInfo& info) {
GrSurfaceDesc desc;
desc.fWidth = info.width();
desc.fHeight = info.height();
desc.fConfig = SkImageInfo2GrPixelConfig(info);
return desc;
}
void GrMakeKeyFromImageID(GrUniqueKey* key, uint32_t imageID, const SkIRect& imageBounds) {
SkASSERT(key);
SkASSERT(imageID);
SkASSERT(!imageBounds.isEmpty());
static const GrUniqueKey::Domain kImageIDDomain = GrUniqueKey::GenerateDomain();
GrUniqueKey::Builder builder(key, kImageIDDomain, 5, "Image");
builder[0] = imageID;
builder[1] = imageBounds.fLeft;
builder[2] = imageBounds.fTop;
builder[3] = imageBounds.fRight;
builder[4] = imageBounds.fBottom;
}
////////////////////////////////////////////////////////////////////////////////
void GrInstallBitmapUniqueKeyInvalidator(const GrUniqueKey& key, uint32_t contextUniqueID,
SkPixelRef* pixelRef) {
class Invalidator : public SkPixelRef::GenIDChangeListener {
public:
explicit Invalidator(const GrUniqueKey& key, uint32_t contextUniqueID)
: fMsg(key, contextUniqueID) {}
private:
GrUniqueKeyInvalidatedMessage fMsg;
void onChange() override { SkMessageBus<GrUniqueKeyInvalidatedMessage>::Post(fMsg); }
};
pixelRef->addGenIDChangeListener(new Invalidator(key, contextUniqueID));
}
sk_sp<GrTextureProxy> GrCopyBaseMipMapToTextureProxy(GrRecordingContext* ctx,
GrTextureProxy* baseProxy) {
SkASSERT(baseProxy);
if (!ctx->priv().caps()->isFormatCopyable(baseProxy->backendFormat())) {
return nullptr;
}
return GrSurfaceProxy::Copy(ctx, baseProxy, GrMipMapped::kYes, SkBackingFit::kExact,
SkBudgeted::kYes);
}
sk_sp<GrTextureProxy> GrRefCachedBitmapTextureProxy(GrRecordingContext* ctx,
const SkBitmap& bitmap,
const GrSamplerState& params,
SkScalar scaleAdjust[2]) {
return GrBitmapTextureMaker(ctx, bitmap).refTextureProxyForParams(params, scaleAdjust);
}
sk_sp<GrTextureProxy> GrMakeCachedBitmapProxy(GrProxyProvider* proxyProvider,
const SkBitmap& bitmap,
SkBackingFit fit) {
if (!bitmap.peekPixels(nullptr)) {
return nullptr;
}
// In non-ddl we will always instantiate right away. Thus we never want to copy the SkBitmap
// even if its mutable. In ddl, if the bitmap is mutable then we must make a copy since the
// upload of the data to the gpu can happen at anytime and the bitmap may change by then.
SkCopyPixelsMode cpyMode = proxyProvider->renderingDirectly() ? kNever_SkCopyPixelsMode
: kIfMutable_SkCopyPixelsMode;
sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(bitmap, cpyMode);
if (!image) {
return nullptr;
}
return GrMakeCachedImageProxy(proxyProvider, std::move(image), fit);
}
static void create_unique_key_for_image(const SkImage* image, GrUniqueKey* result) {
if (!image) {
result->reset(); // will be invalid
return;
}
if (const SkBitmap* bm = as_IB(image)->onPeekBitmap()) {
if (!bm->isVolatile()) {
SkIPoint origin = bm->pixelRefOrigin();
SkIRect subset = SkIRect::MakeXYWH(origin.fX, origin.fY, bm->width(), bm->height());
GrMakeKeyFromImageID(result, bm->getGenerationID(), subset);
}
return;
}
GrMakeKeyFromImageID(result, image->uniqueID(), image->bounds());
}
sk_sp<GrTextureProxy> GrMakeCachedImageProxy(GrProxyProvider* proxyProvider,
sk_sp<SkImage> srcImage,
SkBackingFit fit) {
sk_sp<GrTextureProxy> proxy;
GrUniqueKey originalKey;
create_unique_key_for_image(srcImage.get(), &originalKey);
if (originalKey.isValid()) {
proxy = proxyProvider->findOrCreateProxyByUniqueKey(originalKey, kTopLeft_GrSurfaceOrigin);
}
if (!proxy) {
proxy = proxyProvider->createTextureProxy(srcImage, GrRenderable::kNo, 1, SkBudgeted::kYes,
fit);
if (proxy && originalKey.isValid()) {
proxyProvider->assignUniqueKeyToProxy(originalKey, proxy.get());
const SkBitmap* bm = as_IB(srcImage.get())->onPeekBitmap();
// When recording DDLs we do not want to install change listeners because doing
// so isn't threadsafe.
if (bm && proxyProvider->renderingDirectly()) {
GrInstallBitmapUniqueKeyInvalidator(originalKey, proxyProvider->contextID(),
bm->pixelRef());
}
}
}
return proxy;
}
///////////////////////////////////////////////////////////////////////////////
SkPMColor4f SkColorToPMColor4f(SkColor c, const GrColorSpaceInfo& colorSpaceInfo) {
SkColor4f color = SkColor4f::FromColor(c);
if (auto* xform = colorSpaceInfo.colorSpaceXformFromSRGB()) {
color = xform->apply(color);
}
return color.premul();
}
SkColor4f SkColor4fPrepForDst(SkColor4f color, const GrColorSpaceInfo& colorSpaceInfo) {
if (auto* xform = colorSpaceInfo.colorSpaceXformFromSRGB()) {
color = xform->apply(color);
}
return color;
}
///////////////////////////////////////////////////////////////////////////////
GrPixelConfig SkColorType2GrPixelConfig(const SkColorType type) {
switch (type) {
case kUnknown_SkColorType:
return kUnknown_GrPixelConfig;
case kAlpha_8_SkColorType:
return kAlpha_8_GrPixelConfig;
case kRGB_565_SkColorType:
return kRGB_565_GrPixelConfig;
case kARGB_4444_SkColorType:
return kRGBA_4444_GrPixelConfig;
case kRGBA_8888_SkColorType:
return kRGBA_8888_GrPixelConfig;
case kRGB_888x_SkColorType:
return kRGB_888_GrPixelConfig;
case kBGRA_8888_SkColorType:
return kBGRA_8888_GrPixelConfig;
case kRGBA_1010102_SkColorType:
return kRGBA_1010102_GrPixelConfig;
case kRGB_101010x_SkColorType:
return kUnknown_GrPixelConfig;
case kGray_8_SkColorType:
return kGray_8_GrPixelConfig;
case kRGBA_F16Norm_SkColorType:
return kRGBA_half_Clamped_GrPixelConfig;
case kRGBA_F16_SkColorType:
return kRGBA_half_GrPixelConfig;
case kRGBA_F32_SkColorType:
return kRGBA_float_GrPixelConfig;
}
SkASSERT(0); // shouldn't get here
return kUnknown_GrPixelConfig;
}
GrPixelConfig SkImageInfo2GrPixelConfig(const SkImageInfo& info) {
return SkColorType2GrPixelConfig(info.colorType());
}
bool GrPixelConfigToColorType(GrPixelConfig config, SkColorType* ctOut) {
SkColorType ct = GrColorTypeToSkColorType(GrPixelConfigToColorType(config));
if (kUnknown_SkColorType != ct) {
if (ctOut) {
*ctOut = ct;
}
return true;
}
return false;
}
////////////////////////////////////////////////////////////////////////////////////////////////
static inline bool blend_requires_shader(const SkBlendMode mode) {
return SkBlendMode::kDst != mode;
}
#ifndef SK_IGNORE_GPU_DITHER
static inline int32_t dither_range_type_for_config(GrColorType dstColorType) {
switch (dstColorType) {
case GrColorType::kGray_8:
case GrColorType::kRGBA_8888:
case GrColorType::kRGB_888x:
case GrColorType::kRG_88:
case GrColorType::kBGRA_8888:
case GrColorType::kR_16:
case GrColorType::kRG_1616:
// Experimental (for Y416 and mutant P016/P010)
case GrColorType::kRGBA_16161616:
case GrColorType::kRG_F16:
return 0;
case GrColorType::kBGR_565:
return 1;
case GrColorType::kABGR_4444:
return 2;
case GrColorType::kUnknown:
case GrColorType::kRGBA_8888_SRGB:
case GrColorType::kRGBA_1010102:
case GrColorType::kAlpha_F16:
case GrColorType::kRGBA_F32:
case GrColorType::kRGBA_F16:
case GrColorType::kRGBA_F16_Clamped:
case GrColorType::kAlpha_8:
return -1;
}
SkUNREACHABLE;
}
#endif
static inline bool skpaint_to_grpaint_impl(GrRecordingContext* context,
const GrColorSpaceInfo& colorSpaceInfo,
const SkPaint& skPaint,
const SkMatrix& viewM,
std::unique_ptr<GrFragmentProcessor>* shaderProcessor,
SkBlendMode* primColorMode,
GrPaint* grPaint) {
// Convert SkPaint color to 4f format in the destination color space
SkColor4f origColor = SkColor4fPrepForDst(skPaint.getColor4f(), colorSpaceInfo);
GrFPArgs fpArgs(context, &viewM, skPaint.getFilterQuality(), &colorSpaceInfo);
// Setup the initial color considering the shader, the SkPaint color, and the presence or not
// of per-vertex colors.
std::unique_ptr<GrFragmentProcessor> shaderFP;
if (!primColorMode || blend_requires_shader(*primColorMode)) {
fpArgs.fInputColorIsOpaque = origColor.isOpaque();
if (shaderProcessor) {
shaderFP = std::move(*shaderProcessor);
} else if (const auto* shader = as_SB(skPaint.getShader())) {
shaderFP = shader->asFragmentProcessor(fpArgs);
if (!shaderFP) {
return false;
}
}
}
// Set this in below cases if the output of the shader/paint-color/paint-alpha/primXfermode is
// a known constant value. In that case we can simply apply a color filter during this
// conversion without converting the color filter to a GrFragmentProcessor.
bool applyColorFilterToPaintColor = false;
if (shaderFP) {
if (primColorMode) {
// There is a blend between the primitive color and the shader color. The shader sees
// the opaque paint color. The shader's output is blended using the provided mode by
// the primitive color. The blended color is then modulated by the paint's alpha.
// The geometry processor will insert the primitive color to start the color chain, so
// the GrPaint color will be ignored.
SkPMColor4f shaderInput = origColor.makeOpaque().premul();
shaderFP = GrFragmentProcessor::OverrideInput(std::move(shaderFP), shaderInput);
shaderFP = GrXfermodeFragmentProcessor::MakeFromSrcProcessor(std::move(shaderFP),
*primColorMode);
// The above may return null if compose results in a pass through of the prim color.
if (shaderFP) {
grPaint->addColorFragmentProcessor(std::move(shaderFP));
}
// We can ignore origColor here - alpha is unchanged by gamma
float paintAlpha = skPaint.getColor4f().fA;
if (1.0f != paintAlpha) {
// No gamut conversion - paintAlpha is a (linear) alpha value, splatted to all
// color channels. It's value should be treated as the same in ANY color space.
grPaint->addColorFragmentProcessor(GrConstColorProcessor::Make(
{ paintAlpha, paintAlpha, paintAlpha, paintAlpha },
GrConstColorProcessor::InputMode::kModulateRGBA));
}
} else {
// The shader's FP sees the paint *unpremul* color
SkPMColor4f origColorAsPM = { origColor.fR, origColor.fG, origColor.fB, origColor.fA };
grPaint->setColor4f(origColorAsPM);
grPaint->addColorFragmentProcessor(std::move(shaderFP));
}
} else {
if (primColorMode) {
// There is a blend between the primitive color and the paint color. The blend considers
// the opaque paint color. The paint's alpha is applied to the post-blended color.
SkPMColor4f opaqueColor = origColor.makeOpaque().premul();
auto processor = GrConstColorProcessor::Make(opaqueColor,
GrConstColorProcessor::InputMode::kIgnore);
processor = GrXfermodeFragmentProcessor::MakeFromSrcProcessor(std::move(processor),
*primColorMode);
if (processor) {
grPaint->addColorFragmentProcessor(std::move(processor));
}
grPaint->setColor4f(opaqueColor);
// We can ignore origColor here - alpha is unchanged by gamma
float paintAlpha = skPaint.getColor4f().fA;
if (1.0f != paintAlpha) {
// No gamut conversion - paintAlpha is a (linear) alpha value, splatted to all
// color channels. It's value should be treated as the same in ANY color space.
grPaint->addColorFragmentProcessor(GrConstColorProcessor::Make(
{ paintAlpha, paintAlpha, paintAlpha, paintAlpha },
GrConstColorProcessor::InputMode::kModulateRGBA));
}
} else {
// No shader, no primitive color.
grPaint->setColor4f(origColor.premul());
applyColorFilterToPaintColor = true;
}
}
SkColorFilter* colorFilter = skPaint.getColorFilter();
if (colorFilter) {
if (applyColorFilterToPaintColor) {
grPaint->setColor4f(
colorFilter->filterColor4f(origColor, colorSpaceInfo.colorSpace()).premul());
} else {
auto cfFP = colorFilter->asFragmentProcessor(context, colorSpaceInfo);
if (cfFP) {
grPaint->addColorFragmentProcessor(std::move(cfFP));
} else {
return false;
}
}
}
SkMaskFilterBase* maskFilter = as_MFB(skPaint.getMaskFilter());
if (maskFilter) {
// We may have set this before passing to the SkShader.
fpArgs.fInputColorIsOpaque = false;
if (auto mfFP = maskFilter->asFragmentProcessor(fpArgs)) {
grPaint->addCoverageFragmentProcessor(std::move(mfFP));
}
}
// When the xfermode is null on the SkPaint (meaning kSrcOver) we need the XPFactory field on
// the GrPaint to also be null (also kSrcOver).
SkASSERT(!grPaint->getXPFactory());
if (!skPaint.isSrcOver()) {
grPaint->setXPFactory(SkBlendMode_AsXPFactory(skPaint.getBlendMode()));
}
#ifndef SK_IGNORE_GPU_DITHER
// Conservative default, in case GrPixelConfigToColorType() fails.
GrColorType ct = colorSpaceInfo.colorType();
if (SkPaintPriv::ShouldDither(skPaint, GrColorTypeToSkColorType(ct)) &&
grPaint->numColorFragmentProcessors() > 0) {
int32_t ditherRange = dither_range_type_for_config(ct);
if (ditherRange >= 0) {
static int ditherIndex = GrSkSLFP::NewIndex();
auto ditherFP = GrSkSLFP::Make(context, ditherIndex, "Dither", SKSL_DITHER_SRC,
&ditherRange, sizeof(ditherRange));
if (ditherFP) {
grPaint->addColorFragmentProcessor(std::move(ditherFP));
}
}
}
#endif
return true;
}
bool SkPaintToGrPaint(GrRecordingContext* context, const GrColorSpaceInfo& colorSpaceInfo,
const SkPaint& skPaint, const SkMatrix& viewM, GrPaint* grPaint) {
return skpaint_to_grpaint_impl(context, colorSpaceInfo, skPaint, viewM, nullptr, nullptr,
grPaint);
}
/** Replaces the SkShader (if any) on skPaint with the passed in GrFragmentProcessor. */
bool SkPaintToGrPaintReplaceShader(GrRecordingContext* context,
const GrColorSpaceInfo& colorSpaceInfo,
const SkPaint& skPaint,
std::unique_ptr<GrFragmentProcessor> shaderFP,
GrPaint* grPaint) {
if (!shaderFP) {
return false;
}
return skpaint_to_grpaint_impl(context, colorSpaceInfo, skPaint, SkMatrix::I(), &shaderFP,
nullptr, grPaint);
}
/** Ignores the SkShader (if any) on skPaint. */
bool SkPaintToGrPaintNoShader(GrRecordingContext* context,
const GrColorSpaceInfo& colorSpaceInfo,
const SkPaint& skPaint,
GrPaint* grPaint) {
// Use a ptr to a nullptr to to indicate that the SkShader is ignored and not replaced.
std::unique_ptr<GrFragmentProcessor> nullShaderFP(nullptr);
return skpaint_to_grpaint_impl(context, colorSpaceInfo, skPaint, SkMatrix::I(), &nullShaderFP,
nullptr, grPaint);
}
/** Blends the SkPaint's shader (or color if no shader) with a per-primitive color which must
be setup as a vertex attribute using the specified SkBlendMode. */
bool SkPaintToGrPaintWithXfermode(GrRecordingContext* context,
const GrColorSpaceInfo& colorSpaceInfo,
const SkPaint& skPaint,
const SkMatrix& viewM,
SkBlendMode primColorMode,
GrPaint* grPaint) {
return skpaint_to_grpaint_impl(context, colorSpaceInfo, skPaint, viewM, nullptr, &primColorMode,
grPaint);
}
bool SkPaintToGrPaintWithTexture(GrRecordingContext* context,
const GrColorSpaceInfo& colorSpaceInfo,
const SkPaint& paint,
const SkMatrix& viewM,
std::unique_ptr<GrFragmentProcessor> fp,
bool textureIsAlphaOnly,
GrPaint* grPaint) {
std::unique_ptr<GrFragmentProcessor> shaderFP;
if (textureIsAlphaOnly) {
if (const auto* shader = as_SB(paint.getShader())) {
shaderFP = shader->asFragmentProcessor(GrFPArgs(
context, &viewM, paint.getFilterQuality(), &colorSpaceInfo));
if (!shaderFP) {
return false;
}
std::unique_ptr<GrFragmentProcessor> fpSeries[] = { std::move(shaderFP), std::move(fp) };
shaderFP = GrFragmentProcessor::RunInSeries(fpSeries, 2);
} else {
shaderFP = GrFragmentProcessor::MakeInputPremulAndMulByOutput(std::move(fp));
}
} else {
if (paint.getColor4f().isOpaque()) {
shaderFP = GrFragmentProcessor::OverrideInput(std::move(fp), SK_PMColor4fWHITE, false);
} else {
shaderFP = GrFragmentProcessor::MulChildByInputAlpha(std::move(fp));
}
}
return SkPaintToGrPaintReplaceShader(context, colorSpaceInfo, paint, std::move(shaderFP),
grPaint);
}
////////////////////////////////////////////////////////////////////////////////////////////////
GrSamplerState::Filter GrSkFilterQualityToGrFilterMode(SkFilterQuality paintFilterQuality,
const SkMatrix& viewM,
const SkMatrix& localM,
bool sharpenMipmappedTextures,
bool* doBicubic) {
*doBicubic = false;
GrSamplerState::Filter textureFilterMode;
switch (paintFilterQuality) {
case kNone_SkFilterQuality:
textureFilterMode = GrSamplerState::Filter::kNearest;
break;
case kLow_SkFilterQuality:
textureFilterMode = GrSamplerState::Filter::kBilerp;
break;
case kMedium_SkFilterQuality: {
SkMatrix matrix;
matrix.setConcat(viewM, localM);
// With sharp mips, we bias lookups by -0.5. That means our final LOD is >= 0 until the
// computed LOD is >= 0.5. At what scale factor does a texture get an LOD of 0.5?
//
// Want: 0 = log2(1/s) - 0.5
// 0.5 = log2(1/s)
// 2^0.5 = 1/s
// 1/2^0.5 = s
// 2^0.5/2 = s
SkScalar mipScale = sharpenMipmappedTextures ? SK_ScalarRoot2Over2 : SK_Scalar1;
if (matrix.getMinScale() < mipScale) {
textureFilterMode = GrSamplerState::Filter::kMipMap;
} else {
// Don't trigger MIP level generation unnecessarily.
textureFilterMode = GrSamplerState::Filter::kBilerp;
}
break;
}
case kHigh_SkFilterQuality: {
SkMatrix matrix;
matrix.setConcat(viewM, localM);
*doBicubic = GrBicubicEffect::ShouldUseBicubic(matrix, &textureFilterMode);
break;
}
default:
// Should be unreachable. If not, fall back to mipmaps.
textureFilterMode = GrSamplerState::Filter::kMipMap;
break;
}
return textureFilterMode;
}