return 0.4375f + (-x3 / 6.0f - 3.0f * x2 * 0.25f - 1.125f * x);
}
-/* ComputeBlurProfile allocates and fills in an array of floating
+/* compute_profile allocates and fills in an array of floating
point values between 0 and 255 for the profile signature of
a blurred half-plane with the given blur radius. Since we're
going to be doing screened multiplications (i.e., 1 - (1-x)(1-y))
memory returned in profile_out.
*/
-void SkBlurMask::ComputeBlurProfile(SkScalar sigma, uint8_t **profile_out) {
+static void compute_profile(SkScalar sigma, unsigned int **profile_out) {
int size = SkScalarCeilToInt(6*sigma);
int center = size >> 1;
- uint8_t *profile = SkNEW_ARRAY(uint8_t, size);
+ unsigned int *profile = SkNEW_ARRAY(unsigned int, size);
float invr = 1.f/(2*sigma);
// Implementation adapted from Michael Herf's approach:
// http://stereopsis.com/shadowrect/
-uint8_t SkBlurMask::ProfileLookup(const uint8_t *profile, int loc, int blurred_width, int sharp_width) {
+static inline unsigned int profile_lookup( unsigned int *profile, int loc, int blurred_width, int sharp_width ) {
int dx = SkAbs32(((loc << 1) + 1) - blurred_width) - sharp_width; // how far are we from the original edge?
int ox = dx >> 1;
if (ox < 0) {
return profile[ox];
}
-void SkBlurMask::ComputeBlurredScanline(uint8_t *pixels, const uint8_t *profile,
- unsigned int width, SkScalar sigma) {
-
- unsigned int profile_size = SkScalarCeilToInt(6*sigma);
- SkAutoTMalloc<uint8_t> horizontalScanline(width);
-
- unsigned int sw = width - profile_size;
- // nearest odd number less than the profile size represents the center
- // of the (2x scaled) profile
- int center = ( profile_size & ~1 ) - 1;
-
- int w = sw - center;
-
- for (unsigned int x = 0 ; x < width ; ++x) {
- if (profile_size <= sw) {
- pixels[x] = ProfileLookup(profile, x, width, w);
- } else {
- float span = float(sw)/(2*sigma);
- float giX = 1.5f - (x+.5f)/(2*sigma);
- pixels[x] = (uint8_t) (255 * (gaussianIntegral(giX) - gaussianIntegral(giX + span)));
- }
- }
-}
-
bool SkBlurMask::BlurRect(SkMask *dst, const SkRect &src,
SkScalar radius, Style style,
SkIPoint *margin, SkMask::CreateMode createMode) {
}
return true;
}
- uint8_t *profile = NULL;
+ unsigned int *profile = NULL;
- ComputeBlurProfile(sigma, &profile);
- SkAutoTDeleteArray<uint8_t> ada(profile);
+ compute_profile(sigma, &profile);
+ SkAutoTDeleteArray<unsigned int> ada(profile);
size_t dstSize = dst->computeImageSize();
if (0 == dstSize) {
int dstHeight = dst->fBounds.height();
int dstWidth = dst->fBounds.width();
+ // nearest odd number less than the profile size represents the center
+ // of the (2x scaled) profile
+ int center = ( profile_size & ~1 ) - 1;
+
+ int w = sw - center;
+ int h = sh - center;
+
uint8_t *outptr = dp;
SkAutoTMalloc<uint8_t> horizontalScanline(dstWidth);
- SkAutoTMalloc<uint8_t> verticalScanline(dstHeight);
-
- ComputeBlurredScanline(horizontalScanline, profile, dstWidth, sigma);
- ComputeBlurredScanline(verticalScanline, profile, dstHeight, sigma);
+
+ for (int x = 0 ; x < dstWidth ; ++x) {
+ if (profile_size <= sw) {
+ horizontalScanline[x] = profile_lookup(profile, x, dstWidth, w);
+ } else {
+ float span = float(sw)/(2*sigma);
+ float giX = 1.5f - (x+.5f)/(2*sigma);
+ horizontalScanline[x] = (uint8_t) (255 * (gaussianIntegral(giX) - gaussianIntegral(giX + span)));
+ }
+ }
for (int y = 0 ; y < dstHeight ; ++y) {
+ unsigned int profile_y;
+ if (profile_size <= sh) {
+ profile_y = profile_lookup(profile, y, dstHeight, h);
+ } else {
+ float span = float(sh)/(2*sigma);
+ float giY = 1.5f - (y+.5f)/(2*sigma);
+ profile_y = (uint8_t) (255 * (gaussianIntegral(giY) - gaussianIntegral(giY + span)));
+ }
+
for (int x = 0 ; x < dstWidth ; x++) {
- unsigned int maskval = SkMulDiv255Round(horizontalScanline[x], verticalScanline[y]);
+ unsigned int maskval = SkMulDiv255Round(horizontalScanline[x], profile_y);
*(outptr++) = maskval;
}
}
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrTexture.h"
-#include "GrEffect.h"
-#include "gl/GrGLEffect.h"
#include "effects/GrSimpleTextureEffect.h"
-#include "GrTBackendEffectFactory.h"
#include "SkGrPixelRef.h"
#endif
const SkIRect& clipBounds,
const SkMatrix& ctm,
SkRect* maskRect) const SK_OVERRIDE;
- virtual bool directFilterMaskGPU(GrContext* context,
- GrPaint* grp,
- const SkStrokeRec& strokeRec,
- const SkPath& path) const SK_OVERRIDE;
-
virtual bool filterMaskGPU(GrTexture* src,
const SkMatrix& ctm,
const SkRect& maskRect,
#if SK_SUPPORT_GPU
-class GrGLRectBlurEffect;
-
-class GrRectBlurEffect : public GrEffect {
-public:
- virtual ~GrRectBlurEffect();
-
- static const char* Name() { return "RectBlur"; }
-
- typedef GrGLRectBlurEffect GLEffect;
-
- virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE;
- virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
- /**
- * Create a simple filter effect with custom bicubic coefficients.
- */
- static GrEffectRef* Create(GrContext *context, const SkRect& rect,
- float sigma) {
- GrTexture *horizontalScanline, *verticalScanline;
- bool createdScanlines = CreateScanlineTextures(context, sigma,
- SkScalarCeilToInt(rect.width()),
- SkScalarCeilToInt(rect.height()),
- &horizontalScanline, &verticalScanline);
- if (!createdScanlines) {
- return NULL;
- }
- AutoEffectUnref effect(SkNEW_ARGS(GrRectBlurEffect, (rect, sigma,
- horizontalScanline, verticalScanline)));
- return CreateEffectRef(effect);
- }
-
- unsigned int getWidth() const { return fWidth; }
- unsigned int getHeight() const { return fHeight; }
- float getSigma() const { return fSigma; }
-
-private:
- GrRectBlurEffect(const SkRect& rect, float sigma,
- GrTexture *horizontal_scanline, GrTexture *vertical_scanline);
- virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
-
- static bool CreateScanlineTextures(GrContext *context, float sigma,
- unsigned int width, unsigned int height,
- GrTexture **horizontalScanline,
- GrTexture **verticalScanline);
-
- unsigned int fWidth, fHeight;
- float fSigma;
- GrTextureAccess fHorizontalScanlineAccess;
- GrTextureAccess fVerticalScanlineAccess;
- GrCoordTransform fTransform;
-
- GR_DECLARE_EFFECT_TEST;
-
- typedef GrEffect INHERITED;
-};
-
-class GrGLRectBlurEffect : public GrGLEffect {
-public:
- GrGLRectBlurEffect(const GrBackendEffectFactory& factory,
- const GrDrawEffect&);
- virtual void emitCode(GrGLShaderBuilder*,
- const GrDrawEffect&,
- EffectKey,
- const char* outputColor,
- const char* inputColor,
- const TransformedCoordsArray&,
- const TextureSamplerArray&) SK_OVERRIDE;
-
- virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
-
-private:
- typedef GrGLUniformManager::UniformHandle UniformHandle;
-
- UniformHandle fWidthUni;
- UniformHandle fHeightUni;
-
- typedef GrGLEffect INHERITED;
-};
-
-GrGLRectBlurEffect::GrGLRectBlurEffect(const GrBackendEffectFactory& factory, const GrDrawEffect&)
- : INHERITED(factory) {
-}
-
-void GrGLRectBlurEffect::emitCode(GrGLShaderBuilder* builder,
- const GrDrawEffect&,
- EffectKey key,
- const char* outputColor,
- const char* inputColor,
- const TransformedCoordsArray& coords,
- const TextureSamplerArray& samplers) {
-
- SkString texture_coords = builder->ensureFSCoords2D(coords, 0);
-
- if (inputColor) {
- builder->fsCodeAppendf("\tvec4 src=%s;\n", inputColor);
- } else {
- builder->fsCodeAppendf("\tvec4 src=vec4(1)\n;");
- }
-
- builder->fsCodeAppendf("\tvec4 horiz = ");
- builder->fsAppendTextureLookup( samplers[0], texture_coords.c_str() );
- builder->fsCodeAppendf(";\n");
- builder->fsCodeAppendf("\tvec4 vert = ");
- builder->fsAppendTextureLookup( samplers[1], texture_coords.c_str() );
- builder->fsCodeAppendf(";\n");
-
- builder->fsCodeAppendf("\tfloat final = (horiz*vert).r;\n");
- builder->fsCodeAppendf("\t%s = final*src;\n", outputColor);
-}
-
-void GrGLRectBlurEffect::setData(const GrGLUniformManager& uman,
- const GrDrawEffect& drawEffect) {
-}
-
-bool GrRectBlurEffect::CreateScanlineTextures(GrContext *context, float sigma,
- unsigned int width, unsigned int height,
- GrTexture **horizontalScanline,
- GrTexture **verticalScanline) {
- GrTextureParams params;
- GrTextureDesc texDesc;
-
- unsigned int profile_size = SkScalarFloorToInt(6*sigma);
-
- texDesc.fWidth = width;
- texDesc.fHeight = 1;
- texDesc.fConfig = kAlpha_8_GrPixelConfig;
-
- static const GrCacheID::Domain gBlurProfileDomain = GrCacheID::GenerateDomain();
- GrCacheID::Key key;
- memset(&key, 0, sizeof(key));
- key.fData32[0] = profile_size;
- key.fData32[1] = width;
- key.fData32[2] = 1;
- GrCacheID horizontalCacheID(gBlurProfileDomain, key);
-
- uint8_t *profile = NULL;
- SkAutoTDeleteArray<uint8_t> ada(profile);
-
- *horizontalScanline = context->findAndRefTexture(texDesc, horizontalCacheID, ¶ms);
-
- if (NULL == *horizontalScanline) {
-
- SkBlurMask::ComputeBlurProfile(sigma, &profile);
-
- SkAutoTMalloc<uint8_t> horizontalPixels(width);
- SkBlurMask::ComputeBlurredScanline(horizontalPixels, profile, width, sigma);
-
- *horizontalScanline = context->createTexture(¶ms, texDesc, horizontalCacheID,
- horizontalPixels, 0);
-
- if (NULL == *horizontalScanline) {
- return false;
- }
- }
-
- texDesc.fWidth = 1;
- texDesc.fHeight = height;
- key.fData32[1] = 1;
- key.fData32[2] = height;
- GrCacheID verticalCacheID(gBlurProfileDomain, key);
-
- *verticalScanline = context->findAndRefTexture(texDesc, verticalCacheID, ¶ms);
- if (NULL == *verticalScanline) {
- if (NULL == profile) {
- SkBlurMask::ComputeBlurProfile(sigma, &profile);
- }
-
- SkAutoTMalloc<uint8_t> verticalPixels(height);
- SkBlurMask::ComputeBlurredScanline(verticalPixels, profile, height, sigma);
-
- *verticalScanline = context->createTexture(¶ms, texDesc, verticalCacheID,
- verticalPixels, 0);
-
- if (NULL == *verticalScanline) {
- return false;
- }
-
- }
- return true;
-}
-
-GrRectBlurEffect::GrRectBlurEffect(const SkRect& rect, float sigma,
- GrTexture *horizontal_scanline, GrTexture *vertical_scanline)
- : INHERITED(),
- fWidth(horizontal_scanline->width()),
- fHeight(vertical_scanline->width()),
- fSigma(sigma),
- fHorizontalScanlineAccess(horizontal_scanline),
- fVerticalScanlineAccess(vertical_scanline) {
- SkMatrix mat;
- mat.setRectToRect(rect, SkRect::MakeWH(1,1), SkMatrix::kFill_ScaleToFit);
- fTransform = GrCoordTransform(kLocal_GrCoordSet, mat);
- this->addTextureAccess(&fHorizontalScanlineAccess);
- this->addTextureAccess(&fVerticalScanlineAccess);
- this->addCoordTransform(&fTransform);
-}
-
-GrRectBlurEffect::~GrRectBlurEffect() {
-}
-
-const GrBackendEffectFactory& GrRectBlurEffect::getFactory() const {
- return GrTBackendEffectFactory<GrRectBlurEffect>::getInstance();
-}
-
-bool GrRectBlurEffect::onIsEqual(const GrEffect& sBase) const {
- const GrRectBlurEffect& s = CastEffect<GrRectBlurEffect>(sBase);
- return this->getWidth() == s.getWidth() &&
- this->getHeight() == s.getHeight() &&
- this->getSigma() == s.getSigma();
-}
-
-void GrRectBlurEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
- *validFlags = 0;
- return;
-}
-
-GR_DEFINE_EFFECT_TEST(GrRectBlurEffect);
-
-GrEffectRef* GrRectBlurEffect::TestCreate(SkRandom* random,
- GrContext* context,
- const GrDrawTargetCaps&,
- GrTexture**) {
- float sigma = random->nextRangeF(3,8);
- float width = random->nextRangeF(200,300);
- float height = random->nextRangeF(200,300);
- return GrRectBlurEffect::Create(context, SkRect::MakeWH(width, height), sigma);
-}
-
-
-bool SkBlurMaskFilterImpl::directFilterMaskGPU(GrContext* context,
- GrPaint* grp,
- const SkStrokeRec& strokeRec,
- const SkPath& path) const {
- if (fBlurStyle != SkBlurMaskFilter::kNormal_BlurStyle) {
- return false;
- }
-
- SkRect rect;
- if (!path.isRect(&rect)) {
- return false;
- }
-
- if (!strokeRec.isFillStyle()) {
- return false;
- }
-
- SkMatrix ctm = context->getMatrix();
- SkScalar xformedSigma = this->computeXformedSigma(ctm);
- rect.outset(3*xformedSigma, 3*xformedSigma);
-
- SkAutoTUnref<GrEffectRef> effect(GrRectBlurEffect::Create(
- context, rect, xformedSigma));
- if (!effect) {
- return false;
- }
-
- GrContext::AutoMatrix am;
- if (!am.setIdentity(context, grp)) {
- return false;
- }
-
-
- grp->addCoverageEffect(effect);
-
- context->drawRect(*grp, rect);
- return true;
-}
-
bool SkBlurMaskFilterImpl::canFilterMaskGPU(const SkRect& srcBounds,
const SkIRect& clipBounds,
const SkMatrix& ctm,
projects / platform / upstream / libSkiaSharp.git / commitdiff