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/*
* Copyright 2012 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkMorphologyImageFilter.h"
#include "SkBitmap.h"
#include "SkColorPriv.h"
#include "SkFlattenableBuffers.h"
#include "SkRect.h"
#include "SkMorphology_opts.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrTexture.h"
#include "GrTBackendEffectFactory.h"
#include "gl/GrGLEffect.h"
#include "effects/Gr1DKernelEffect.h"
#include "SkImageFilterUtils.h"
#endif
SkMorphologyImageFilter::SkMorphologyImageFilter(SkFlattenableReadBuffer& buffer)
: INHERITED(buffer) {
fRadius.fWidth = buffer.readInt();
fRadius.fHeight = buffer.readInt();
buffer.validate((fRadius.fWidth >= 0) &&
(fRadius.fHeight >= 0));
}
SkMorphologyImageFilter::SkMorphologyImageFilter(int radiusX, int radiusY, SkImageFilter* input, const CropRect* cropRect)
: INHERITED(input, cropRect), fRadius(SkISize::Make(radiusX, radiusY)) {
}
void SkMorphologyImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
this->INHERITED::flatten(buffer);
buffer.writeInt(fRadius.fWidth);
buffer.writeInt(fRadius.fHeight);
}
enum MorphDirection {
kX, kY
};
template<MorphDirection direction>
static void erode(const SkPMColor* src, SkPMColor* dst,
int radius, int width, int height,
int srcStride, int dstStride)
{
const int srcStrideX = direction == kX ? 1 : srcStride;
const int dstStrideX = direction == kX ? 1 : dstStride;
const int srcStrideY = direction == kX ? srcStride : 1;
const int dstStrideY = direction == kX ? dstStride : 1;
radius = SkMin32(radius, width - 1);
const SkPMColor* upperSrc = src + radius * srcStrideX;
for (int x = 0; x < width; ++x) {
const SkPMColor* lp = src;
const SkPMColor* up = upperSrc;
SkPMColor* dptr = dst;
for (int y = 0; y < height; ++y) {
int minB = 255, minG = 255, minR = 255, minA = 255;
for (const SkPMColor* p = lp; p <= up; p += srcStrideX) {
int b = SkGetPackedB32(*p);
int g = SkGetPackedG32(*p);
int r = SkGetPackedR32(*p);
int a = SkGetPackedA32(*p);
if (b < minB) minB = b;
if (g < minG) minG = g;
if (r < minR) minR = r;
if (a < minA) minA = a;
}
*dptr = SkPackARGB32(minA, minR, minG, minB);
dptr += dstStrideY;
lp += srcStrideY;
up += srcStrideY;
}
if (x >= radius) src += srcStrideX;
if (x + radius < width - 1) upperSrc += srcStrideX;
dst += dstStrideX;
}
}
static void erodeX(const SkBitmap& src, SkBitmap* dst, int radiusX, const SkIRect& bounds)
{
SkMorphologyProc erodeXProc = SkMorphologyGetPlatformProc(kErodeX_SkMorphologyProcType);
if (!erodeXProc) {
erodeXProc = erode<kX>;
}
erodeXProc(src.getAddr32(bounds.left(), bounds.top()), dst->getAddr32(0, 0),
radiusX, bounds.width(), bounds.height(),
src.rowBytesAsPixels(), dst->rowBytesAsPixels());
}
static void erodeY(const SkBitmap& src, SkBitmap* dst, int radiusY, const SkIRect& bounds)
{
SkMorphologyProc erodeYProc = SkMorphologyGetPlatformProc(kErodeY_SkMorphologyProcType);
if (!erodeYProc) {
erodeYProc = erode<kY>;
}
erodeYProc(src.getAddr32(bounds.left(), bounds.top()), dst->getAddr32(0, 0),
radiusY, bounds.height(), bounds.width(),
src.rowBytesAsPixels(), dst->rowBytesAsPixels());
}
template<MorphDirection direction>
static void dilate(const SkPMColor* src, SkPMColor* dst,
int radius, int width, int height,
int srcStride, int dstStride)
{
const int srcStrideX = direction == kX ? 1 : srcStride;
const int dstStrideX = direction == kX ? 1 : dstStride;
const int srcStrideY = direction == kX ? srcStride : 1;
const int dstStrideY = direction == kX ? dstStride : 1;
radius = SkMin32(radius, width - 1);
const SkPMColor* upperSrc = src + radius * srcStrideX;
for (int x = 0; x < width; ++x) {
const SkPMColor* lp = src;
const SkPMColor* up = upperSrc;
SkPMColor* dptr = dst;
for (int y = 0; y < height; ++y) {
int maxB = 0, maxG = 0, maxR = 0, maxA = 0;
for (const SkPMColor* p = lp; p <= up; p += srcStrideX) {
int b = SkGetPackedB32(*p);
int g = SkGetPackedG32(*p);
int r = SkGetPackedR32(*p);
int a = SkGetPackedA32(*p);
if (b > maxB) maxB = b;
if (g > maxG) maxG = g;
if (r > maxR) maxR = r;
if (a > maxA) maxA = a;
}
*dptr = SkPackARGB32(maxA, maxR, maxG, maxB);
dptr += dstStrideY;
lp += srcStrideY;
up += srcStrideY;
}
if (x >= radius) src += srcStrideX;
if (x + radius < width - 1) upperSrc += srcStrideX;
dst += dstStrideX;
}
}
static void dilateX(const SkBitmap& src, SkBitmap* dst, int radiusX, const SkIRect& bounds)
{
SkMorphologyProc dilateXProc = SkMorphologyGetPlatformProc(kDilateX_SkMorphologyProcType);
if (!dilateXProc) {
dilateXProc = dilate<kX>;
}
dilateXProc(src.getAddr32(bounds.left(), bounds.top()), dst->getAddr32(0, 0),
radiusX, bounds.width(), bounds.height(),
src.rowBytesAsPixels(), dst->rowBytesAsPixels());
}
static void dilateY(const SkBitmap& src, SkBitmap* dst, int radiusY, const SkIRect& bounds)
{
SkMorphologyProc dilateYProc = SkMorphologyGetPlatformProc(kDilateY_SkMorphologyProcType);
if (!dilateYProc) {
dilateYProc = dilate<kY>;
}
dilateYProc(src.getAddr32(bounds.left(), bounds.top()), dst->getAddr32(0, 0),
radiusY, bounds.height(), bounds.width(),
src.rowBytesAsPixels(), dst->rowBytesAsPixels());
}
bool SkErodeImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& source, const SkMatrix& ctm,
SkBitmap* dst, SkIPoint* offset) {
SkBitmap src = source;
if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctm, &src, offset)) {
return false;
}
if (src.config() != SkBitmap::kARGB_8888_Config) {
return false;
}
SkIRect bounds;
src.getBounds(&bounds);
if (!this->applyCropRect(&bounds, ctm)) {
return false;
}
SkAutoLockPixels alp(src);
if (!src.getPixels()) {
return false;
}
dst->setConfig(src.config(), bounds.width(), bounds.height());
dst->allocPixels();
int width = radius().width();
int height = radius().height();
if (width < 0 || height < 0) {
return false;
}
if (width == 0 && height == 0) {
src.extractSubset(dst, bounds);
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
SkBitmap temp;
temp.setConfig(dst->config(), dst->width(), dst->height());
if (!temp.allocPixels()) {
return false;
}
if (width > 0 && height > 0) {
erodeX(src, &temp, width, bounds);
SkIRect tmpBounds = SkIRect::MakeWH(bounds.width(), bounds.height());
erodeY(temp, dst, height, tmpBounds);
} else if (width > 0) {
erodeX(src, dst, width, bounds);
} else if (height > 0) {
erodeY(src, dst, height, bounds);
}
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
bool SkDilateImageFilter::onFilterImage(Proxy* proxy,
const SkBitmap& source, const SkMatrix& ctm,
SkBitmap* dst, SkIPoint* offset) {
SkBitmap src = source;
if (getInput(0) && !getInput(0)->filterImage(proxy, source, ctm, &src, offset)) {
return false;
}
if (src.config() != SkBitmap::kARGB_8888_Config) {
return false;
}
SkIRect bounds;
src.getBounds(&bounds);
if (!this->applyCropRect(&bounds, ctm)) {
return false;
}
SkAutoLockPixels alp(src);
if (!src.getPixels()) {
return false;
}
dst->setConfig(src.config(), bounds.width(), bounds.height());
dst->allocPixels();
int width = radius().width();
int height = radius().height();
if (width < 0 || height < 0) {
return false;
}
if (width == 0 && height == 0) {
src.extractSubset(dst, bounds);
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
SkBitmap temp;
temp.setConfig(dst->config(), dst->width(), dst->height());
if (!temp.allocPixels()) {
return false;
}
if (width > 0 && height > 0) {
dilateX(src, &temp, width, bounds);
SkIRect tmpBounds = SkIRect::MakeWH(bounds.width(), bounds.height());
dilateY(temp, dst, height, tmpBounds);
} else if (width > 0) {
dilateX(src, dst, width, bounds);
} else if (height > 0) {
dilateY(src, dst, height, bounds);
}
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
#if SK_SUPPORT_GPU
///////////////////////////////////////////////////////////////////////////////
class GrGLMorphologyEffect;
/**
* Morphology effects. Depending upon the type of morphology, either the
* component-wise min (Erode_Type) or max (Dilate_Type) of all pixels in the
* kernel is selected as the new color. The new color is modulated by the input
* color.
*/
class GrMorphologyEffect : public Gr1DKernelEffect {
public:
enum MorphologyType {
kErode_MorphologyType,
kDilate_MorphologyType,
};
static GrEffectRef* Create(GrTexture* tex, Direction dir, int radius, MorphologyType type) {
AutoEffectUnref effect(SkNEW_ARGS(GrMorphologyEffect, (tex, dir, radius, type)));
return CreateEffectRef(effect);
}
virtual ~GrMorphologyEffect();
MorphologyType type() const { return fType; }
static const char* Name() { return "Morphology"; }
typedef GrGLMorphologyEffect GLEffect;
virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE;
virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
protected:
MorphologyType fType;
private:
virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
GrMorphologyEffect(GrTexture*, Direction, int radius, MorphologyType);
GR_DECLARE_EFFECT_TEST;
typedef Gr1DKernelEffect INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
class GrGLMorphologyEffect : public GrGLEffect {
public:
GrGLMorphologyEffect (const GrBackendEffectFactory&, const GrDrawEffect&);
virtual void emitCode(GrGLShaderBuilder*,
const GrDrawEffect&,
EffectKey,
const char* outputColor,
const char* inputColor,
const TransformedCoordsArray&,
const TextureSamplerArray&) SK_OVERRIDE;
static inline EffectKey GenKey(const GrDrawEffect&, const GrGLCaps&);
virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
private:
int width() const { return GrMorphologyEffect::WidthFromRadius(fRadius); }
int fRadius;
GrMorphologyEffect::MorphologyType fType;
GrGLUniformManager::UniformHandle fImageIncrementUni;
typedef GrGLEffect INHERITED;
};
GrGLMorphologyEffect::GrGLMorphologyEffect(const GrBackendEffectFactory& factory,
const GrDrawEffect& drawEffect)
: INHERITED(factory) {
const GrMorphologyEffect& m = drawEffect.castEffect<GrMorphologyEffect>();
fRadius = m.radius();
fType = m.type();
}
void GrGLMorphologyEffect::emitCode(GrGLShaderBuilder* builder,
const GrDrawEffect&,
EffectKey key,
const char* outputColor,
const char* inputColor,
const TransformedCoordsArray& coords,
const TextureSamplerArray& samplers) {
SkString coords2D = builder->ensureFSCoords2D(coords, 0);
fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_Visibility,
kVec2f_GrSLType, "ImageIncrement");
const char* func;
switch (fType) {
case GrMorphologyEffect::kErode_MorphologyType:
builder->fsCodeAppendf("\t\t%s = vec4(1, 1, 1, 1);\n", outputColor);
func = "min";
break;
case GrMorphologyEffect::kDilate_MorphologyType:
builder->fsCodeAppendf("\t\t%s = vec4(0, 0, 0, 0);\n", outputColor);
func = "max";
break;
default:
GrCrash("Unexpected type");
func = ""; // suppress warning
break;
}
const char* imgInc = builder->getUniformCStr(fImageIncrementUni);
builder->fsCodeAppendf("\t\tvec2 coord = %s - %d.0 * %s;\n", coords2D.c_str(), fRadius, imgInc);
builder->fsCodeAppendf("\t\tfor (int i = 0; i < %d; i++) {\n", this->width());
builder->fsCodeAppendf("\t\t\t%s = %s(%s, ", outputColor, func, outputColor);
builder->fsAppendTextureLookup(samplers[0], "coord");
builder->fsCodeAppend(");\n");
builder->fsCodeAppendf("\t\t\tcoord += %s;\n", imgInc);
builder->fsCodeAppend("\t\t}\n");
SkString modulate;
GrGLSLMulVarBy4f(&modulate, 2, outputColor, inputColor);
builder->fsCodeAppend(modulate.c_str());
}
GrGLEffect::EffectKey GrGLMorphologyEffect::GenKey(const GrDrawEffect& drawEffect,
const GrGLCaps&) {
const GrMorphologyEffect& m = drawEffect.castEffect<GrMorphologyEffect>();
EffectKey key = static_cast<EffectKey>(m.radius());
key |= (m.type() << 8);
return key;
}
void GrGLMorphologyEffect::setData(const GrGLUniformManager& uman,
const GrDrawEffect& drawEffect) {
const Gr1DKernelEffect& kern = drawEffect.castEffect<Gr1DKernelEffect>();
GrTexture& texture = *kern.texture(0);
// the code we generated was for a specific kernel radius
SkASSERT(kern.radius() == fRadius);
float imageIncrement[2] = { 0 };
switch (kern.direction()) {
case Gr1DKernelEffect::kX_Direction:
imageIncrement[0] = 1.0f / texture.width();
break;
case Gr1DKernelEffect::kY_Direction:
imageIncrement[1] = 1.0f / texture.height();
break;
default:
GrCrash("Unknown filter direction.");
}
uman.set2fv(fImageIncrementUni, 0, 1, imageIncrement);
}
///////////////////////////////////////////////////////////////////////////////
GrMorphologyEffect::GrMorphologyEffect(GrTexture* texture,
Direction direction,
int radius,
MorphologyType type)
: Gr1DKernelEffect(texture, direction, radius)
, fType(type) {
}
GrMorphologyEffect::~GrMorphologyEffect() {
}
const GrBackendEffectFactory& GrMorphologyEffect::getFactory() const {
return GrTBackendEffectFactory<GrMorphologyEffect>::getInstance();
}
bool GrMorphologyEffect::onIsEqual(const GrEffect& sBase) const {
const GrMorphologyEffect& s = CastEffect<GrMorphologyEffect>(sBase);
return (this->texture(0) == s.texture(0) &&
this->radius() == s.radius() &&
this->direction() == s.direction() &&
this->type() == s.type());
}
void GrMorphologyEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
// This is valid because the color components of the result of the kernel all come
// exactly from existing values in the source texture.
this->updateConstantColorComponentsForModulation(color, validFlags);
}
///////////////////////////////////////////////////////////////////////////////
GR_DEFINE_EFFECT_TEST(GrMorphologyEffect);
GrEffectRef* GrMorphologyEffect::TestCreate(SkRandom* random,
GrContext*,
const GrDrawTargetCaps&,
GrTexture* textures[]) {
int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
GrEffectUnitTest::kAlphaTextureIdx;
Direction dir = random->nextBool() ? kX_Direction : kY_Direction;
static const int kMaxRadius = 10;
int radius = random->nextRangeU(1, kMaxRadius);
MorphologyType type = random->nextBool() ? GrMorphologyEffect::kErode_MorphologyType :
GrMorphologyEffect::kDilate_MorphologyType;
return GrMorphologyEffect::Create(textures[texIdx], dir, radius, type);
}
namespace {
void apply_morphology_pass(GrContext* context,
GrTexture* texture,
const SkIRect& srcRect,
const SkIRect& dstRect,
int radius,
GrMorphologyEffect::MorphologyType morphType,
Gr1DKernelEffect::Direction direction) {
GrPaint paint;
paint.addColorEffect(GrMorphologyEffect::Create(texture,
direction,
radius,
morphType))->unref();
context->drawRectToRect(paint, SkRect::Make(dstRect), SkRect::Make(srcRect));
}
bool apply_morphology(const SkBitmap& input,
const SkIRect& rect,
GrMorphologyEffect::MorphologyType morphType,
SkISize radius,
SkBitmap* dst) {
GrTexture* srcTexture = input.getTexture();
SkASSERT(NULL != srcTexture);
GrContext* context = srcTexture->getContext();
srcTexture->ref();
SkAutoTUnref<GrTexture> src(srcTexture);
GrContext::AutoMatrix am;
am.setIdentity(context);
GrContext::AutoClip acs(context, SkRect::MakeWH(SkIntToScalar(srcTexture->width()),
SkIntToScalar(srcTexture->height())));
SkIRect dstRect = SkIRect::MakeWH(rect.width(), rect.height());
GrTextureDesc desc;
desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
desc.fWidth = rect.width();
desc.fHeight = rect.height();
desc.fConfig = kSkia8888_GrPixelConfig;
SkIRect srcRect = rect;
if (radius.fWidth > 0) {
GrAutoScratchTexture ast(context, desc);
GrContext::AutoRenderTarget art(context, ast.texture()->asRenderTarget());
apply_morphology_pass(context, src, srcRect, dstRect, radius.fWidth,
morphType, Gr1DKernelEffect::kX_Direction);
SkIRect clearRect = SkIRect::MakeXYWH(dstRect.fLeft, dstRect.fBottom,
dstRect.width(), radius.fHeight);
context->clear(&clearRect, GrMorphologyEffect::kErode_MorphologyType == morphType ?
SK_ColorWHITE :
SK_ColorTRANSPARENT);
src.reset(ast.detach());
srcRect = dstRect;
}
if (radius.fHeight > 0) {
GrAutoScratchTexture ast(context, desc);
GrContext::AutoRenderTarget art(context, ast.texture()->asRenderTarget());
apply_morphology_pass(context, src, srcRect, dstRect, radius.fHeight,
morphType, Gr1DKernelEffect::kY_Direction);
src.reset(ast.detach());
}
return SkImageFilterUtils::WrapTexture(src, rect.width(), rect.height(), dst);
}
};
bool SkDilateImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
SkBitmap* result, SkIPoint* offset) {
SkBitmap input;
if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &input, offset)) {
return false;
}
SkIRect bounds;
src.getBounds(&bounds);
if (!this->applyCropRect(&bounds, ctm)) {
return false;
}
int width = radius().width();
int height = radius().height();
if (width < 0 || height < 0) {
return false;
}
if (width == 0 && height == 0) {
src.extractSubset(result, bounds);
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
if (!apply_morphology(input, bounds, GrMorphologyEffect::kDilate_MorphologyType, radius(), result)) {
return false;
}
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
bool SkErodeImageFilter::filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
SkBitmap* result, SkIPoint* offset) {
SkBitmap input;
if (!SkImageFilterUtils::GetInputResultGPU(getInput(0), proxy, src, ctm, &input, offset)) {
return false;
}
SkIRect bounds;
src.getBounds(&bounds);
if (!this->applyCropRect(&bounds, ctm)) {
return false;
}
int width = radius().width();
int height = radius().height();
if (width < 0 || height < 0) {
return false;
}
if (width == 0 && height == 0) {
src.extractSubset(result, bounds);
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
if (!apply_morphology(input, bounds, GrMorphologyEffect::kErode_MorphologyType, radius(), result)) {
return false;
}
offset->fX += bounds.left();
offset->fY += bounds.top();
return true;
}
#endif