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-rw-r--r--src/core/SkBitmapFilter.cpp378
1 files changed, 0 insertions, 378 deletions
diff --git a/src/core/SkBitmapFilter.cpp b/src/core/SkBitmapFilter.cpp
deleted file mode 100644
index cc6ad95d1e..0000000000
--- a/src/core/SkBitmapFilter.cpp
+++ /dev/null
@@ -1,378 +0,0 @@
-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkBitmapProcState.h"
-#include "SkBitmap.h"
-#include "SkColor.h"
-#include "SkColorPriv.h"
-#include "SkUnPreMultiply.h"
-#include "SkShader.h"
-#include "SkRTConf.h"
-#include "SkMath.h"
-
-void highQualityFilter(const SkBitmapProcState& s, int x, int y,
- SkPMColor* SK_RESTRICT colors, int count) {
-
- const int maxX = s.fBitmap->width() - 1;
- const int maxY = s.fBitmap->height() - 1;
-
- while (count-- > 0) {
- SkPoint srcPt;
- s.fInvProc(*s.fInvMatrix, SkIntToScalar(x),
- SkIntToScalar(y), &srcPt);
- srcPt.fX -= SK_ScalarHalf;
- srcPt.fY -= SK_ScalarHalf;
- SkScalar fractx = srcPt.fX - SkScalarFloorToScalar(srcPt.fX);
- SkScalar fracty = srcPt.fY - SkScalarFloorToScalar(srcPt.fY);
-
- int sx = SkScalarFloorToInt(srcPt.fX);
- int sy = SkScalarFloorToInt(srcPt.fY);
-
- SkFixed weight = 0;
- SkFixed fr = 0, fg = 0, fb = 0, fa = 0;
-
- int y0 = SkClampMax(int(ceil(sy-s.getBitmapFilter()->width() + 0.5f)), maxY);
- int y1 = SkClampMax(int(floor(sy+s.getBitmapFilter()->width() + 0.5f)), maxY);
- int x0 = SkClampMax(int(ceil(sx-s.getBitmapFilter()->width() + 0.5f)), maxX);
- int x1 = SkClampMax(int(floor(sx+s.getBitmapFilter()->width() + 0.5f)), maxX);
-
- for (int src_y = y0; src_y <= y1; src_y++) {
- SkFixed yweight = s.getBitmapFilter()->lookup((srcPt.fY - src_y));
-
- for (int src_x = x0; src_x <= x1 ; src_x++) {
- SkFixed xweight = s.getBitmapFilter()->lookup((srcPt.fX - src_x));
-
- SkFixed combined_weight = SkFixedMul(xweight, yweight);
-
- SkPMColor c = *s.fBitmap->getAddr32(src_x, src_y);
- fr += combined_weight * SkGetPackedR32(c);
- fg += combined_weight * SkGetPackedG32(c);
- fb += combined_weight * SkGetPackedB32(c);
- fa += combined_weight * SkGetPackedA32(c);
- weight += combined_weight;
- }
- }
-
- fr = SkFixedDiv(fr, weight);
- fg = SkFixedDiv(fg, weight);
- fb = SkFixedDiv(fb, weight);
- fa = SkFixedDiv(fa, weight);
-
- int a = SkClampMax(SkFixedRoundToInt(fa), 255);
- int r = SkClampMax(SkFixedRoundToInt(fr), a);
- int g = SkClampMax(SkFixedRoundToInt(fg), a);
- int b = SkClampMax(SkFixedRoundToInt(fb), a);
-
- *colors++ = SkPackARGB32(a, r, g, b);
-
- x++;
- }
-}
-
-void highQualityFilter_ScaleOnly(const SkBitmapProcState &s, int x, int y,
- SkPMColor *SK_RESTRICT colors, int count) {
- const int maxX = s.fBitmap->width() - 1;
- const int maxY = s.fBitmap->height() - 1;
-
- SkPoint srcPt;
-
- s.fInvProc(*s.fInvMatrix, SkIntToScalar(x),
- SkIntToScalar(y), &srcPt);
- srcPt.fY -= SK_ScalarHalf;
- SkScalar fracty = srcPt.fY - SkScalarFloorToScalar(srcPt.fY);
- int sy = SkScalarFloorToInt(srcPt.fY);
- int y0 = SkClampMax(int(ceil(sy-s.getBitmapFilter()->width() + 0.5f)), maxY);
- int y1 = SkClampMax(int(floor(sy+s.getBitmapFilter()->width() + 0.5f)), maxY);
-
- while (count-- > 0) {
- s.fInvProc(*s.fInvMatrix, SkIntToScalar(x),
- SkIntToScalar(y), &srcPt);
- srcPt.fX -= SK_ScalarHalf;
- srcPt.fY -= SK_ScalarHalf;
- SkScalar fractx = srcPt.fX - SkScalarFloorToScalar(srcPt.fX);
-
- int sx = SkScalarFloorToInt(srcPt.fX);
-
- SkFixed weight = 0;
- SkFixed fr = 0, fg = 0, fb = 0, fa = 0;
-
- int x0 = SkClampMax(int(ceil(sx-s.getBitmapFilter()->width() + 0.5f)), maxX);
- int x1 = SkClampMax(int(floor(sx+s.getBitmapFilter()->width() + 0.5f)), maxX);
-
- for (int src_y = y0; src_y <= y1; src_y++) {
- SkFixed yweight = s.getBitmapFilter()->lookup((srcPt.fY - src_y));
-
- for (int src_x = x0; src_x <= x1 ; src_x++) {
- SkFixed xweight = s.getBitmapFilter()->lookup((srcPt.fX - src_x));
-
- SkFixed combined_weight = SkFixedMul(xweight, yweight);
-
- SkPMColor c = *s.fBitmap->getAddr32(src_x, src_y);
- fr += combined_weight * SkGetPackedR32(c);
- fg += combined_weight * SkGetPackedG32(c);
- fb += combined_weight * SkGetPackedB32(c);
- fa += combined_weight * SkGetPackedA32(c);
- weight += combined_weight;
- }
- }
-
- fr = SkFixedDiv(fr, weight);
- fg = SkFixedDiv(fg, weight);
- fb = SkFixedDiv(fb, weight);
- fa = SkFixedDiv(fa, weight);
-
- int a = SkClampMax(SkFixedRoundToInt(fa), 255);
- int r = SkClampMax(SkFixedRoundToInt(fr), a);
- int g = SkClampMax(SkFixedRoundToInt(fg), a);
- int b = SkClampMax(SkFixedRoundToInt(fb), a);
-
- *colors++ = SkPackARGB32(a, r, g, b);
-
- x++;
- }
-}
-
-SK_CONF_DECLARE(const char *, c_bitmapFilter, "bitmap.filter", "mitchell", "Which bitmap filter to use [mitchell, sinc, gaussian, triangle, box]");
-
-static SkBitmapFilter *allocateBitmapFilter() {
- if (!strcmp(c_bitmapFilter, "mitchell")) {
- return SkNEW_ARGS(SkMitchellFilter,(1.f/3.f,1.f/3.f));
- } else if (!strcmp(c_bitmapFilter, "sinc")) {
- return SkNEW_ARGS(SkSincFilter,(3));
- } else if (!strcmp(c_bitmapFilter, "gaussian")) {
- return SkNEW_ARGS(SkGaussianFilter,(2));
- } else if (!strcmp(c_bitmapFilter, "triangle")) {
- return SkNEW(SkTriangleFilter);
- } else if (!strcmp(c_bitmapFilter, "box")) {
- return SkNEW(SkBoxFilter);
- } else {
- SkASSERT(!!!"Unknown filter type");
- }
-
- return NULL;
-}
-
-SkBitmapProcState::ShaderProc32
-SkBitmapProcState::chooseBitmapFilterProc(const SkPaint& paint) {
- // we need to be requested
- uint32_t mask = SkPaint::kFilterBitmap_Flag
- | SkPaint::kHighQualityFilterBitmap_Flag
- ;
- if ((paint.getFlags() & mask) != mask) {
- return NULL;
- }
-
- // TODO: consider supporting other configs (e.g. 565, A8)
- if (fBitmap->config() != SkBitmap::kARGB_8888_Config) {
- return NULL;
- }
-
- // TODO: consider supporting repeat and mirror
- if (SkShader::kClamp_TileMode != fTileModeX || SkShader::kClamp_TileMode != fTileModeY) {
- return NULL;
- }
-
- // TODO: support blending inside our procs
- if (0xFF != paint.getAlpha()) {
- return NULL;
- }
-
- if (fInvType & (SkMatrix::kAffine_Mask | SkMatrix::kScale_Mask)) {
- fBitmapFilter = allocateBitmapFilter();
- }
-
- if (fInvType & SkMatrix::kAffine_Mask) {
- return highQualityFilter;
- } else if (fInvType & SkMatrix::kScale_Mask) {
- return highQualityFilter_ScaleOnly;
- } else {
- return NULL;
- }
-}
-
-static void divideByWeights(SkFixed *sums, SkFixed *weights, SkBitmap *dst) {
- for (int y = 0 ; y < dst->height() ; y++) {
- for (int x = 0 ; x < dst->width() ; x++) {
- SkFixed fr = SkFixedDiv(sums[4*(y*dst->width() + x) + 0], weights[y*dst->width() + x]);
- SkFixed fg = SkFixedDiv(sums[4*(y*dst->width() + x) + 1], weights[y*dst->width() + x]);
- SkFixed fb = SkFixedDiv(sums[4*(y*dst->width() + x) + 2], weights[y*dst->width() + x]);
- SkFixed fa = SkFixedDiv(sums[4*(y*dst->width() + x) + 3], weights[y*dst->width() + x]);
- int a = SkClampMax(SkFixedRoundToInt(fa), 255);
- int r = SkClampMax(SkFixedRoundToInt(fr), a);
- int g = SkClampMax(SkFixedRoundToInt(fg), a);
- int b = SkClampMax(SkFixedRoundToInt(fb), a);
-
- *dst->getAddr32(x,y) = SkPackARGB32(a, r, g, b);
- }
- }
-}
-
-static void upScaleHoriz(const SkBitmap *src, SkBitmap *dst, float scale, SkBitmapFilter *filter) {
- for (int y = 0 ; y < src->height() ; y++) {
- for (int x = 0 ; x < dst->width() ; x++) {
- float sx = x / scale - 0.5f;
- int x0 = SkClampMax(int(ceil(sx-filter->width() + 0.5f)), src->width()-1);
- int x1 = SkClampMax(int(floor(sx+filter->width() + 0.5f)), src->width()-1);
-
- SkFixed total_weight = 0;
- SkFixed fr = 0, fg = 0, fb = 0, fa = 0;
-
- for (int src_x = x0 ; src_x <= x1 ; src_x++) {
- SkFixed weight = filter->lookup(sx - src_x);
- SkPMColor c = *src->getAddr32(src_x,y);
- fr += weight * SkGetPackedR32(c);
- fg += weight * SkGetPackedG32(c);
- fb += weight * SkGetPackedB32(c);
- fa += weight * SkGetPackedA32(c);
- total_weight += weight;
- }
- fr = SkFixedDiv(fr, total_weight);
- fg = SkFixedDiv(fg, total_weight);
- fb = SkFixedDiv(fb, total_weight);
- fa = SkFixedDiv(fa, total_weight);
-
- int a = SkClampMax(SkFixedRoundToInt(fa), 255);
- int r = SkClampMax(SkFixedRoundToInt(fr), a);
- int g = SkClampMax(SkFixedRoundToInt(fg), a);
- int b = SkClampMax(SkFixedRoundToInt(fb), a);
-
- *dst->getAddr32(x,y) = SkPackARGB32(a, r, g, b);
- }
- }
-}
-
-static void downScaleHoriz(const SkBitmap *src, SkBitmap *dst, float scale, SkBitmapFilter *filter) {
- SkFixed *sums = SkNEW_ARRAY(SkFixed, dst->width() * dst->height() * 4);
- SkFixed *weights = SkNEW_ARRAY(SkFixed, dst->width() * dst->height());
-
- SkAutoTDeleteArray<SkFixed> ada1(sums);
- SkAutoTDeleteArray<SkFixed> ada2(weights);
-
- memset(sums, 0, dst->width() * dst->height() * sizeof(SkFixed) * 4);
- memset(weights, 0, dst->width() * dst->height() * sizeof(SkFixed));
-
- for (int y = 0 ; y < src->height() ; y++) {
- for (int x = 0 ; x < src->width() ; x++) {
- // splat each source pixel into the destination image
- float dx = (x + 0.5f) * scale;
- int x0 = SkClampMax(int(ceil(dx-filter->width() + 0.5f)), dst->width()-1);
- int x1 = SkClampMax(int(floor(dx+filter->width() + 0.5f)), dst->width()-1);
-
- SkPMColor c = *src->getAddr32(x,y);
-
- for (int dst_x = x0 ; dst_x <= x1 ; dst_x++) {
- SkFixed weight = filter->lookup(dx - dst_x);
- sums[4*(y*dst->width() + dst_x) + 0] += weight*SkGetPackedR32(c);
- sums[4*(y*dst->width() + dst_x) + 1] += weight*SkGetPackedG32(c);
- sums[4*(y*dst->width() + dst_x) + 2] += weight*SkGetPackedB32(c);
- sums[4*(y*dst->width() + dst_x) + 3] += weight*SkGetPackedA32(c);
- weights[y*dst->width() + dst_x] += weight;
- }
- }
- }
-
- divideByWeights(sums, weights, dst);
-}
-
-static void upScaleVert(const SkBitmap *src, SkBitmap *dst, float scale, SkBitmapFilter *filter) {
- for (int y = 0 ; y < dst->height() ; y++) {
- for (int x = 0 ; x < dst->width() ; x++) {
- float sy = y / scale - 0.5f;
- int y0 = SkClampMax(int(ceil(sy-filter->width() + 0.5f)), src->height()-1);
- int y1 = SkClampMax(int(floor(sy+filter->width() + 0.5f)), src->height()-1);
-
- SkFixed total_weight = 0;
- SkFixed fr = 0, fg = 0, fb = 0, fa = 0;
-
- for (int src_y = y0 ; src_y <= y1 ; src_y++) {
- SkFixed weight = filter->lookup(sy - src_y);
- SkPMColor c = *src->getAddr32(x,src_y);
- fr += weight * SkGetPackedR32(c);
- fg += weight * SkGetPackedG32(c);
- fb += weight * SkGetPackedB32(c);
- fa += weight * SkGetPackedA32(c);
- total_weight += weight;
- }
- fr = SkFixedDiv(fr, total_weight);
- fg = SkFixedDiv(fg, total_weight);
- fb = SkFixedDiv(fb, total_weight);
- fa = SkFixedDiv(fa, total_weight);
-
- int a = SkClampMax(SkFixedRoundToInt(fa), 255);
- int r = SkClampMax(SkFixedRoundToInt(fr), a);
- int g = SkClampMax(SkFixedRoundToInt(fg), a);
- int b = SkClampMax(SkFixedRoundToInt(fb), a);
-
- *dst->getAddr32(x,y) = SkPackARGB32(a, r, g, b);
- }
- }
-}
-
-static void downScaleVert(const SkBitmap *src, SkBitmap *dst, float scale, SkBitmapFilter *filter) {
- SkFixed *sums = SkNEW_ARRAY(SkFixed, dst->width() * dst->height() * 4);
- SkFixed *weights = SkNEW_ARRAY(SkFixed, dst->width() * dst->height());
-
- SkAutoTDeleteArray<SkFixed> ada1(sums);
- SkAutoTDeleteArray<SkFixed> ada2(weights);
-
- memset(sums, 0, dst->width() * dst->height() * sizeof(SkFixed) * 4);
- memset(weights, 0, dst->width() * dst->height() * sizeof(SkFixed));
-
- for (int y = 0 ; y < src->height() ; y++) {
- for (int x = 0 ; x < src->width() ; x++) {
- // splat each source pixel into the destination image
- float dy = (y + 0.5f) * scale;
- int y0 = SkClampMax(int(ceil(dy-filter->width() + 0.5f)), dst->height()-1);
- int y1 = SkClampMax(int(floor(dy+filter->width() + 0.5f)), dst->height()-1);
-
- SkPMColor c = *src->getAddr32(x,y);
-
- for (int dst_y = y0 ; dst_y <= y1 ; dst_y++) {
- SkFixed weight = filter->lookup(dy - dst_y);
- sums[4*(dst_y*dst->width() + x) + 0] += weight*SkGetPackedR32(c);
- sums[4*(dst_y*dst->width() + x) + 1] += weight*SkGetPackedG32(c);
- sums[4*(dst_y*dst->width() + x) + 2] += weight*SkGetPackedB32(c);
- sums[4*(dst_y*dst->width() + x) + 3] += weight*SkGetPackedA32(c);
- weights[dst_y*dst->width() + x] += weight;
- }
- }
- }
-
- divideByWeights(sums, weights, dst);
-}
-
-void SkBitmap::scale(SkBitmap *dst) const {
-
- SkBitmap horiz_temp;
-
- horiz_temp.setConfig(SkBitmap::kARGB_8888_Config, dst->width(), height());
- horiz_temp.allocPixels();
-
- SkBitmapFilter *filter = allocateBitmapFilter();
-
- float horiz_scale = float(dst->width()) / width();
-
- if (horiz_scale == 1) {
- this->copyPixelsTo(horiz_temp.getPixels(), getSize());
- } else if (horiz_scale > 1) {
- upScaleHoriz(this, &horiz_temp, horiz_scale, filter);
- } else if (horiz_scale < 1) {
- downScaleHoriz(this, &horiz_temp, horiz_scale, filter);
- }
-
- float vert_scale = float(dst->height()) / height();
-
- if (vert_scale == 1) {
- horiz_temp.copyPixelsTo(dst->getPixels(), dst->getSize());
- } else if (vert_scale > 1) {
- upScaleVert(&horiz_temp, dst, vert_scale, filter);
- } else if (vert_scale < 1) {
- downScaleVert(&horiz_temp, dst, vert_scale, filter);
- }
-
- SkDELETE(filter);
-}
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