+++ /dev/null
-/*
- * Copyright 2013 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 "SkBicubicImageFilter.h"
-#include "SkBitmap.h"
-#include "SkColorPriv.h"
-#include "SkFlattenableBuffers.h"
-#include "SkMatrix.h"
-#include "SkRect.h"
-#include "SkUnPreMultiply.h"
-
-#if SK_SUPPORT_GPU
-#include "gl/GrGLEffectMatrix.h"
-#include "effects/GrSingleTextureEffect.h"
-#include "GrTBackendEffectFactory.h"
-#include "GrContext.h"
-#include "GrTexture.h"
-#endif
-
-SkBicubicImageFilter::SkBicubicImageFilter(const SkSize& scale, const SkScalar coefficients[16], SkImageFilter* input)
- : INHERITED(input),
- fScale(scale) {
- memcpy(fCoefficients, coefficients, sizeof(fCoefficients));
-}
-
-#define DS(x) SkDoubleToScalar(x)
-
-SkBicubicImageFilter* SkBicubicImageFilter::CreateMitchell(const SkSize& scale,
- SkImageFilter* input) {
- static const SkScalar coefficients[16] = {
- DS( 1.0 / 18.0), DS(-9.0 / 18.0), DS( 15.0 / 18.0), DS( -7.0 / 18.0),
- DS(16.0 / 18.0), DS( 0.0 / 18.0), DS(-36.0 / 18.0), DS( 21.0 / 18.0),
- DS( 1.0 / 18.0), DS( 9.0 / 18.0), DS( 27.0 / 18.0), DS(-21.0 / 18.0),
- DS( 0.0 / 18.0), DS( 0.0 / 18.0), DS( -6.0 / 18.0), DS( 7.0 / 18.0),
- };
- return SkNEW_ARGS(SkBicubicImageFilter, (scale, coefficients, input));
-}
-
-SkBicubicImageFilter::SkBicubicImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
- SkDEBUGCODE(uint32_t readSize =) buffer.readScalarArray(fCoefficients);
- SkASSERT(readSize == 16);
- fScale.fWidth = buffer.readScalar();
- fScale.fHeight = buffer.readScalar();
-}
-
-void SkBicubicImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
- this->INHERITED::flatten(buffer);
- buffer.writeScalarArray(fCoefficients, 16);
- buffer.writeScalar(fScale.fWidth);
- buffer.writeScalar(fScale.fHeight);
-}
-
-SkBicubicImageFilter::~SkBicubicImageFilter() {
-}
-
-inline SkPMColor cubicBlend(const SkScalar c[16], SkScalar t, SkPMColor c0, SkPMColor c1, SkPMColor c2, SkPMColor c3) {
- SkScalar t2 = t * t, t3 = t2 * t;
- SkScalar cc[4];
- // FIXME: For the fractx case, this should be refactored out of this function.
- cc[0] = c[0] + SkScalarMul(c[1], t) + SkScalarMul(c[2], t2) + SkScalarMul(c[3], t3);
- cc[1] = c[4] + SkScalarMul(c[5], t) + SkScalarMul(c[6], t2) + SkScalarMul(c[7], t3);
- cc[2] = c[8] + SkScalarMul(c[9], t) + SkScalarMul(c[10], t2) + SkScalarMul(c[11], t3);
- cc[3] = c[12] + SkScalarMul(c[13], t) + SkScalarMul(c[14], t2) + SkScalarMul(c[15], t3);
- SkScalar a = SkScalarMul(cc[0], SkGetPackedA32(c0)) + SkScalarMul(cc[1], SkGetPackedA32(c1)) + SkScalarMul(cc[2], SkGetPackedA32(c2)) + SkScalarMul(cc[3], SkGetPackedA32(c3));
- SkScalar r = SkScalarMul(cc[0], SkGetPackedR32(c0)) + SkScalarMul(cc[1], SkGetPackedR32(c1)) + SkScalarMul(cc[2], SkGetPackedR32(c2)) + SkScalarMul(cc[3], SkGetPackedR32(c3));
- SkScalar g = SkScalarMul(cc[0], SkGetPackedG32(c0)) + SkScalarMul(cc[1], SkGetPackedG32(c1)) + SkScalarMul(cc[2], SkGetPackedG32(c2)) + SkScalarMul(cc[3], SkGetPackedG32(c3));
- SkScalar b = SkScalarMul(cc[0], SkGetPackedB32(c0)) + SkScalarMul(cc[1], SkGetPackedB32(c1)) + SkScalarMul(cc[2], SkGetPackedB32(c2)) + SkScalarMul(cc[3], SkGetPackedB32(c3));
- return SkPackARGB32(SkScalarRoundToInt(SkScalarClampMax(a, 255)), SkScalarRoundToInt(SkScalarClampMax(r, 255)), SkScalarRoundToInt(SkScalarClampMax(g, 255)), SkScalarRoundToInt(SkScalarClampMax(b, 255)));
-}
-
-bool SkBicubicImageFilter::onFilterImage(Proxy* proxy,
- const SkBitmap& source,
- const SkMatrix& matrix,
- SkBitmap* result,
- SkIPoint* loc) {
- SkBitmap src = this->getInputResult(proxy, source, matrix, loc);
- if (src.config() != SkBitmap::kARGB_8888_Config) {
- return false;
- }
-
- SkAutoLockPixels alp(src);
- if (!src.getPixels()) {
- return false;
- }
-
- SkRect dstRect = SkRect::MakeWH(SkScalarMul(SkIntToScalar(src.width()), fScale.fWidth),
- SkScalarMul(SkIntToScalar(src.height()), fScale.fHeight));
- SkIRect dstIRect;
- dstRect.roundOut(&dstIRect);
- result->setConfig(src.config(), dstIRect.width(), dstIRect.height());
- result->allocPixels();
- if (!result->getPixels()) {
- return false;
- }
-
- SkRect srcRect;
- src.getBounds(&srcRect);
- SkMatrix inverse;
- inverse.setRectToRect(dstRect, srcRect, SkMatrix::kFill_ScaleToFit);
- inverse.postTranslate(SkFloatToScalar(-0.5f), SkFloatToScalar(-0.5f));
-
- for (int y = dstIRect.fTop; y < dstIRect.fBottom; ++y) {
- SkPMColor* dptr = result->getAddr32(dstIRect.fLeft, y);
- for (int x = dstIRect.fLeft; x < dstIRect.fRight; ++x) {
- SkPoint srcPt, dstPt = SkPoint::Make(SkIntToScalar(x), SkIntToScalar(y));
- inverse.mapPoints(&srcPt, &dstPt, 1);
- SkScalar fractx = srcPt.fX - SkScalarFloorToScalar(srcPt.fX);
- SkScalar fracty = srcPt.fY - SkScalarFloorToScalar(srcPt.fY);
- int sx = SkScalarFloorToInt(srcPt.fX);
- int sy = SkScalarFloorToInt(srcPt.fY);
- int x0 = SkClampMax(sx - 1, src.width() - 1);
- int x1 = SkClampMax(sx , src.width() - 1);
- int x2 = SkClampMax(sx + 1, src.width() - 1);
- int x3 = SkClampMax(sx + 2, src.width() - 1);
- int y0 = SkClampMax(sy - 1, src.height() - 1);
- int y1 = SkClampMax(sy , src.height() - 1);
- int y2 = SkClampMax(sy + 1, src.height() - 1);
- int y3 = SkClampMax(sy + 2, src.height() - 1);
- SkPMColor s00 = *src.getAddr32(x0, y0);
- SkPMColor s10 = *src.getAddr32(x1, y0);
- SkPMColor s20 = *src.getAddr32(x2, y0);
- SkPMColor s30 = *src.getAddr32(x3, y0);
- SkPMColor s0 = cubicBlend(fCoefficients, fractx, s00, s10, s20, s30);
- SkPMColor s01 = *src.getAddr32(x0, y1);
- SkPMColor s11 = *src.getAddr32(x1, y1);
- SkPMColor s21 = *src.getAddr32(x2, y1);
- SkPMColor s31 = *src.getAddr32(x3, y1);
- SkPMColor s1 = cubicBlend(fCoefficients, fractx, s01, s11, s21, s31);
- SkPMColor s02 = *src.getAddr32(x0, y2);
- SkPMColor s12 = *src.getAddr32(x1, y2);
- SkPMColor s22 = *src.getAddr32(x2, y2);
- SkPMColor s32 = *src.getAddr32(x3, y2);
- SkPMColor s2 = cubicBlend(fCoefficients, fractx, s02, s12, s22, s32);
- SkPMColor s03 = *src.getAddr32(x0, y3);
- SkPMColor s13 = *src.getAddr32(x1, y3);
- SkPMColor s23 = *src.getAddr32(x2, y3);
- SkPMColor s33 = *src.getAddr32(x3, y3);
- SkPMColor s3 = cubicBlend(fCoefficients, fractx, s03, s13, s23, s33);
- *dptr++ = cubicBlend(fCoefficients, fracty, s0, s1, s2, s3);
- }
- }
- return true;
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-#if SK_SUPPORT_GPU
-
-class GrGLBicubicEffect;
-
-class GrBicubicEffect : public GrSingleTextureEffect {
-public:
- virtual ~GrBicubicEffect();
-
- static const char* Name() { return "Bicubic"; }
- const float* coefficients() const { return fCoefficients; }
-
- typedef GrGLBicubicEffect GLEffect;
-
- virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE;
- virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
- virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
- static GrEffectRef* Create(GrTexture* tex, const SkScalar coefficients[16]) {
- SkAutoTUnref<GrEffect> effect(SkNEW_ARGS(GrBicubicEffect, (tex, coefficients)));
- return CreateEffectRef(effect);
- }
-
-private:
- GrBicubicEffect(GrTexture*, const SkScalar coefficients[16]);
- float fCoefficients[16];
-
- GR_DECLARE_EFFECT_TEST;
-
- typedef GrSingleTextureEffect INHERITED;
-};
-
-class GrGLBicubicEffect : public GrGLEffect {
-public:
- GrGLBicubicEffect(const GrBackendEffectFactory& factory,
- const GrEffect& effect);
- virtual void emitCode(GrGLShaderBuilder*,
- const GrEffectStage&,
- EffectKey,
- const char* vertexCoords,
- const char* outputColor,
- const char* inputColor,
- const TextureSamplerArray&) SK_OVERRIDE;
-
- static inline EffectKey GenKey(const GrEffectStage&, const GrGLCaps&);
-
- virtual void setData(const GrGLUniformManager&, const GrEffectStage&) SK_OVERRIDE;
-
-private:
- typedef GrGLUniformManager::UniformHandle UniformHandle;
-
- UniformHandle fCoefficientsUni;
- UniformHandle fImageIncrementUni;
-
- GrGLEffectMatrix fEffectMatrix;
-
- typedef GrGLEffect INHERITED;
-};
-
-GrGLBicubicEffect::GrGLBicubicEffect(const GrBackendEffectFactory& factory,
- const GrEffect& effect)
- : INHERITED(factory)
- , fCoefficientsUni(GrGLUniformManager::kInvalidUniformHandle)
- , fImageIncrementUni(GrGLUniformManager::kInvalidUniformHandle) {
-}
-
-void GrGLBicubicEffect::emitCode(GrGLShaderBuilder* builder,
- const GrEffectStage&,
- EffectKey key,
- const char* vertexCoords,
- const char* outputColor,
- const char* inputColor,
- const TextureSamplerArray& samplers) {
- const char* coords;
- fEffectMatrix.emitCodeMakeFSCoords2D(builder, key, vertexCoords, &coords);
- fCoefficientsUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType,
- kMat44f_GrSLType, "Coefficients");
- fImageIncrementUni = builder->addUniform(GrGLShaderBuilder::kFragment_ShaderType,
- kVec2f_GrSLType, "ImageIncrement");
- SkString* code = &builder->fFSCode;
-
- const char* imgInc = builder->getUniformCStr(fImageIncrementUni);
- const char* coeff = builder->getUniformCStr(fCoefficientsUni);
-
- SkString cubicBlendName;
-
- static const GrGLShaderVar gCubicBlendArgs[] = {
- GrGLShaderVar("coefficients", kMat44f_GrSLType),
- GrGLShaderVar("t", kFloat_GrSLType),
- GrGLShaderVar("c0", kVec4f_GrSLType),
- GrGLShaderVar("c1", kVec4f_GrSLType),
- GrGLShaderVar("c2", kVec4f_GrSLType),
- GrGLShaderVar("c3", kVec4f_GrSLType),
- };
- builder->emitFunction(GrGLShaderBuilder::kFragment_ShaderType,
- kVec4f_GrSLType,
- "cubicBlend",
- SK_ARRAY_COUNT(gCubicBlendArgs),
- gCubicBlendArgs,
- "\tvec4 ts = vec4(1.0, t, t * t, t * t * t);\n"
- "\tvec4 c = coefficients * ts;\n"
- "\treturn c.x * c0 + c.y * c1 + c.z * c2 + c.w * c3;\n",
- &cubicBlendName);
- code->appendf("\tvec2 coord = %s - %s * vec2(0.5, 0.5);\n", coords, imgInc);
- code->appendf("\tvec2 f = fract(coord / %s);\n", imgInc);
- for (int y = 0; y < 4; ++y) {
- for (int x = 0; x < 4; ++x) {
- SkString coord;
- coord.printf("coord + %s * vec2(%d, %d)", imgInc, x - 1, y - 1);
- code->appendf("\tvec4 s%d%d = ", x, y);
- builder->appendTextureLookup(&builder->fFSCode, samplers[0], coord.c_str());
- code->appendf(";\n");
- }
- code->appendf("\tvec4 s%d = %s(%s, f.x, s0%d, s1%d, s2%d, s3%d);\n", y, cubicBlendName.c_str(), coeff, y, y, y, y);
- }
- code->appendf("\t%s = %s(%s, f.y, s0, s1, s2, s3);\n", outputColor, cubicBlendName.c_str(), coeff);
-}
-
-GrGLEffect::EffectKey GrGLBicubicEffect::GenKey(const GrEffectStage& s, const GrGLCaps&) {
- const GrBicubicEffect& m =
- static_cast<const GrBicubicEffect&>(*s.getEffect());
- EffectKey matrixKey = GrGLEffectMatrix::GenKey(m.getMatrix(),
- s.getCoordChangeMatrix(),
- m.texture(0));
- return matrixKey;
-}
-
-void GrGLBicubicEffect::setData(const GrGLUniformManager& uman,
- const GrEffectStage& stage) {
- const GrBicubicEffect& effect =
- static_cast<const GrBicubicEffect&>(*stage.getEffect());
- GrTexture& texture = *effect.texture(0);
- float imageIncrement[2];
- imageIncrement[0] = 1.0f / texture.width();
- imageIncrement[1] = 1.0f / texture.height();
- uman.set2fv(fImageIncrementUni, 0, 1, imageIncrement);
- uman.setMatrix4f(fCoefficientsUni, effect.coefficients());
- fEffectMatrix.setData(uman,
- effect.getMatrix(),
- stage.getCoordChangeMatrix(),
- effect.texture(0));
-}
-
-GrBicubicEffect::GrBicubicEffect(GrTexture* texture,
- const SkScalar coefficients[16])
- : INHERITED(texture, MakeDivByTextureWHMatrix(texture)) {
- for (int y = 0; y < 4; y++) {
- for (int x = 0; x < 4; x++) {
- // Convert from row-major scalars to column-major floats.
- fCoefficients[x * 4 + y] = SkScalarToFloat(coefficients[y * 4 + x]);
- }
- }
-}
-
-GrBicubicEffect::~GrBicubicEffect() {
-}
-
-const GrBackendEffectFactory& GrBicubicEffect::getFactory() const {
- return GrTBackendEffectFactory<GrBicubicEffect>::getInstance();
-}
-
-bool GrBicubicEffect::onIsEqual(const GrEffect& sBase) const {
- const GrBicubicEffect& s =
- static_cast<const GrBicubicEffect&>(sBase);
- return this->texture(0) == s.texture(0) &&
- !memcmp(fCoefficients, s.coefficients(), 16);
-}
-
-void GrBicubicEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
- // FIXME: Perhaps we can do better.
- *validFlags = 0;
- return;
-}
-
-GR_DEFINE_EFFECT_TEST(GrBicubicEffect);
-
-GrEffectRef* GrBicubicEffect::TestCreate(SkRandom* random,
- GrContext* context,
- GrTexture* textures[]) {
- int texIdx = random->nextBool() ? GrEffectUnitTest::kSkiaPMTextureIdx :
- GrEffectUnitTest::kAlphaTextureIdx;
- SkScalar coefficients[16];
- for (int i = 0; i < 16; i++) {
- coefficients[i] = random->nextSScalar1();
- }
- return GrBicubicEffect::Create(textures[texIdx], coefficients);
-}
-
-GrTexture* SkBicubicImageFilter::filterImageGPU(Proxy* proxy, GrTexture* src, const SkRect& rect) {
- SkAutoTUnref<GrTexture> srcTexture(this->getInputResultAsTexture(proxy, src, rect));
- GrContext* context = srcTexture->getContext();
-
- SkRect dstRect = SkRect::MakeWH(rect.width() * fScale.fWidth,
- rect.height() * fScale.fHeight);
-
- GrTextureDesc desc;
- desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
- desc.fWidth = SkScalarCeilToInt(dstRect.width());
- desc.fHeight = SkScalarCeilToInt(dstRect.height());
- desc.fConfig = kRGBA_8888_GrPixelConfig;
-
- GrAutoScratchTexture ast(context, desc);
- if (!ast.texture()) {
- return NULL;
- }
- GrContext::AutoRenderTarget art(context, ast.texture()->asRenderTarget());
- GrPaint paint;
- paint.colorStage(0)->setEffect(GrBicubicEffect::Create(srcTexture, fCoefficients));
- context->drawRectToRect(paint, dstRect, rect);
- return ast.detach();
-}
-#endif
-
-///////////////////////////////////////////////////////////////////////////////
projects / platform / upstream / libSkiaSharp.git / commitdiff