зеркало из https://github.com/mozilla/moz-skia.git
Add SkTableColorFilter, as a foundation for several SVG filters
git-svn-id: http://skia.googlecode.com/svn/trunk@2933 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
mike@reedtribe.org
Родитель
7012162d2f
Коммит
a69b48c29d
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@ -0,0 +1,139 @@
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkTableColorFilter.h"
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static void make_bm0(SkBitmap* bm) {
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int W = 120;
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int H = 120;
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bm->setConfig(SkBitmap::kARGB_8888_Config, W, H);
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bm->allocPixels();
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bm->eraseColor(0);
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SkCanvas canvas(*bm);
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SkPaint paint;
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SkPoint pts[] = { 0, 0, SkIntToScalar(W), SkIntToScalar(H) };
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SkColor colors[] = {
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SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
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SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
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};
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SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, SK_ARRAY_COUNT(colors),
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SkShader::kClamp_TileMode);
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paint.setShader(s)->unref();
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canvas.drawPaint(paint);
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}
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static void make_bm1(SkBitmap* bm) {
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int W = 120;
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int H = 120;
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bm->setConfig(SkBitmap::kARGB_8888_Config, W, H);
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bm->allocPixels();
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bm->eraseColor(0);
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SkCanvas canvas(*bm);
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SkPaint paint;
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SkScalar cx = SkIntToScalar(W)/2;
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SkScalar cy = SkIntToScalar(H)/2;
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SkColor colors[] = {
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SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE,
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};
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SkShader* s = SkGradientShader::CreateRadial(SkPoint::Make(SkIntToScalar(W)/2,
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SkIntToScalar(H)/2),
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SkIntToScalar(W)/2, colors, NULL, SK_ARRAY_COUNT(colors),
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SkShader::kClamp_TileMode);
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paint.setShader(s)->unref();
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paint.setAntiAlias(true);
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canvas.drawCircle(cx, cy, cx, paint);
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}
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static void make_table0(uint8_t table[]) {
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for (int i = 0; i < 256; ++i) {
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int n = i >> 5;
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table[i] = (n << 5) | (n << 2) | (n >> 1);
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}
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}
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static void make_table1(uint8_t table[]) {
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for (int i = 0; i < 256; ++i) {
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table[i] = i * i / 255;
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}
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}
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static void make_table2(uint8_t table[]) {
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for (int i = 0; i < 256; ++i) {
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float fi = i / 255.0f;
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table[i] = sqrtf(fi) * 255;
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}
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}
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static SkColorFilter* make_cf0() {
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uint8_t table[256]; make_table0(table);
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return SkTableColorFilter::Create(table);
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}
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static SkColorFilter* make_cf1() {
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uint8_t table[256]; make_table1(table);
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return SkTableColorFilter::Create(table);
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}
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static SkColorFilter* make_cf2() {
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uint8_t table[256]; make_table2(table);
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return SkTableColorFilter::Create(table);
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}
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static SkColorFilter* make_cf3() {
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uint8_t table0[256]; make_table0(table0);
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uint8_t table1[256]; make_table1(table1);
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uint8_t table2[256]; make_table2(table2);
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return SkTableColorFilter::CreateARGB(NULL, table0, table1, table2);
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}
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class TableColorFilterGM : public skiagm::GM {
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public:
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TableColorFilterGM() {}
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protected:
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virtual SkString onShortName() {
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return SkString("tablecolorfilter");
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}
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virtual SkISize onISize() {
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return SkISize::Make(640, 480);
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}
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virtual void onDraw(SkCanvas* canvas) {
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canvas->drawColor(0xFFDDDDDD);
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canvas->translate(20, 20);
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SkScalar x = 0, y = 0;
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static void (*gMakers[])(SkBitmap*) = { make_bm0, make_bm1 };
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for (size_t maker = 0; maker < SK_ARRAY_COUNT(gMakers); ++maker) {
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SkBitmap bm;
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gMakers[maker](&bm);
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SkPaint paint;
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x = 0;
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canvas->drawBitmap(bm, x, y, &paint);
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paint.setColorFilter(make_cf0())->unref(); x += bm.width() * 9 / 8;
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canvas->drawBitmap(bm, x, y, &paint);
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paint.setColorFilter(make_cf1())->unref(); x += bm.width() * 9 / 8;
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canvas->drawBitmap(bm, x, y, &paint);
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paint.setColorFilter(make_cf2())->unref(); x += bm.width() * 9 / 8;
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canvas->drawBitmap(bm, x, y, &paint);
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paint.setColorFilter(make_cf3())->unref(); x += bm.width() * 9 / 8;
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canvas->drawBitmap(bm, x, y, &paint);
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y += bm.height() * 9 / 8;
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}
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static skiagm::GM* MyFactory(void*) { return new TableColorFilterGM; }
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static skiagm::GMRegistry reg(MyFactory);
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@ -36,6 +36,7 @@
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'../include/effects/SkPixelXorXfermode.h',
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'../include/effects/SkPorterDuff.h',
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'../include/effects/SkRectShape.h',
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'../include/effects/SkTableColorFilter.h',
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'../include/effects/SkTransparentShader.h',
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'../src/effects/Sk1DPathEffect.cpp',
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@ -69,6 +70,7 @@
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'../src/effects/SkPorterDuff.cpp',
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'../src/effects/SkRadialGradient_Table.h',
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'../src/effects/SkRectShape.cpp',
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'../src/effects/SkTableColorFilter.cpp',
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'../src/effects/SkTestImageFilters.cpp',
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'../src/effects/SkTransparentShader.cpp',
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],
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@ -38,6 +38,7 @@
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'../gm/shapes.cpp',
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'../gm/strokerects.cpp',
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'../gm/strokes.cpp',
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'../gm/tablecolorfilter.cpp',
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'../gm/testimagefilters.cpp',
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'../gm/texdata.cpp',
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'../gm/tilemodes.cpp',
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@ -0,0 +1,34 @@
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#ifndef SkTableColorFilter_DEFINED
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#define SkTableColorFilter_DEFINED
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#include "SkColorFilter.h"
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class SkTableColorFilter {
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public:
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/**
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* Create a table colorfilter, copying the table into the filter, and
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* applying it to all 4 components.
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* a' = table[a];
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* r' = table[r];
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* g' = table[g];
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* b' = table[b];
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* Compoents are operated on in unpremultiplied space. If the incomming
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* colors are premultiplied, they are temporarily unpremultiplied, then
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* the table is applied, and then the result is remultiplied.
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*/
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static SkColorFilter* Create(const uint8_t table[256]);
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/**
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* Create a table colorfilter, with a different table for each
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* component [A, R, G, B]. If a given table is NULL, then it is
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* treated as identity, with the component left unchanged. If a table
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* is not null, then its contents are copied into the filter.
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*/
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static SkColorFilter* CreateARGB(const uint8_t tableA[256],
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const uint8_t tableR[256],
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const uint8_t tableG[256],
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const uint8_t tableB[256]);
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};
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#endif
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@ -0,0 +1,199 @@
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#include "SkColorPriv.h"
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#include "SkTableColorFilter.h"
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#include "SkUnPreMultiply.h"
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class SkTable_ColorFilter : public SkColorFilter {
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public:
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SkTable_ColorFilter(const uint8_t tableA[], const uint8_t tableR[],
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const uint8_t tableG[], const uint8_t tableB[]) {
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fFlags = 0;
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uint8_t* dst = fStorage;
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if (tableA) {
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memcpy(dst, tableA, 256);
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dst += 256;
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fFlags |= kA_Flag;
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}
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if (tableR) {
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memcpy(dst, tableR, 256);
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dst += 256;
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fFlags |= kR_Flag;
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}
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if (tableG) {
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memcpy(dst, tableG, 256);
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dst += 256;
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fFlags |= kG_Flag;
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}
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if (tableB) {
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memcpy(dst, tableB, 256);
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fFlags |= kB_Flag;
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}
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}
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virtual void filterSpan(const SkPMColor src[], int count,
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SkPMColor dst[]) SK_OVERRIDE;
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virtual void flatten(SkFlattenableWriteBuffer&) SK_OVERRIDE;
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virtual Factory getFactory() SK_OVERRIDE;
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static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) {
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return SkNEW_ARGS(SkTable_ColorFilter, (buffer));
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}
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protected:
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SkTable_ColorFilter(SkFlattenableReadBuffer& buffer);
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private:
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enum {
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kA_Flag = 1 << 0,
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kR_Flag = 1 << 1,
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kG_Flag = 1 << 2,
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kB_Flag = 1 << 3,
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};
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uint8_t fStorage[256 * 4];
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unsigned fFlags;
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typedef SkColorFilter INHERITED;
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};
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static const uint8_t gIdentityTable[] = {
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0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
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0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
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0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
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0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
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0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
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0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
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0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
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0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
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0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
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0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
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0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
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0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
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0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
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0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
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0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
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0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
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0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
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0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
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0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
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0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
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0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
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0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
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0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
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0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
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0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
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0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
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0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
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0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
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};
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void SkTable_ColorFilter::filterSpan(const SkPMColor src[], int count,
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SkPMColor dst[]) {
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const uint8_t* table = fStorage;
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const uint8_t* tableA = gIdentityTable;
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const uint8_t* tableR = gIdentityTable;
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const uint8_t* tableG = gIdentityTable;
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const uint8_t* tableB = gIdentityTable;
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if (fFlags & kA_Flag) {
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tableA = table; table += 256;
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}
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if (fFlags & kR_Flag) {
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tableR = table; table += 256;
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}
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if (fFlags & kG_Flag) {
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tableG = table; table += 256;
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}
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if (fFlags & kB_Flag) {
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tableB = table;
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}
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const SkUnPreMultiply::Scale* scaleTable = SkUnPreMultiply::GetScaleTable();
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for (int i = 0; i < count; ++i) {
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SkPMColor c = src[i];
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unsigned a, r, g, b;
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if (0 == c) {
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a = r = g = b = 0;
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} else {
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a = SkGetPackedA32(c);
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r = SkGetPackedR32(c);
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g = SkGetPackedG32(c);
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b = SkGetPackedB32(c);
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if (a < 255) {
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SkUnPreMultiply::Scale scale = scaleTable[a];
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r = SkUnPreMultiply::ApplyScale(scale, r);
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g = SkUnPreMultiply::ApplyScale(scale, g);
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b = SkUnPreMultiply::ApplyScale(scale, b);
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}
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}
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dst[i] = SkPremultiplyARGBInline(tableA[a], tableR[r],
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tableG[g], tableB[b]);
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}
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}
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SkFlattenable::Factory SkTable_ColorFilter::getFactory() {
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return CreateProc;
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}
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static const uint8_t gCountNibBits[] = {
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0, 1, 1, 2,
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1, 2, 2, 3,
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1, 2, 2, 3,
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2, 3, 3, 4
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};
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#include "SkPackBits.h"
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void SkTable_ColorFilter::flatten(SkFlattenableWriteBuffer& buffer) {
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this->INHERITED::flatten(buffer);
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uint8_t storage[5*256];
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int count = gCountNibBits[fFlags & 0xF];
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size_t size = SkPackBits::Pack8(fStorage, count * 256, storage);
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SkASSERT(size <= sizeof(storage));
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// SkDebugf("raw %d packed %d\n", count * 256, size);
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buffer.writeInt(fFlags);
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buffer.writeInt(size);
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buffer.write(storage, size);
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}
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SkTable_ColorFilter::SkTable_ColorFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
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uint8_t storage[5*256];
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fFlags = buffer.readInt();
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size_t size = buffer.readInt();
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buffer.read(storage, size);
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size_t raw = SkPackBits::Unpack8(storage, size, fStorage);
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SkASSERT(raw <= sizeof(fStorage));
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int count = gCountNibBits[fFlags & 0xF];
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SkASSERT(raw == count * 256);
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}
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///////////////////////////////////////////////////////////////////////////////
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#ifdef SK_CPU_BENDIAN
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#else
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#define SK_A32_INDEX (3 - (SK_A32_SHIFT >> 3))
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#define SK_R32_INDEX (3 - (SK_R32_SHIFT >> 3))
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#define SK_G32_INDEX (3 - (SK_G32_SHIFT >> 3))
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#define SK_B32_INDEX (3 - (SK_B32_SHIFT >> 3))
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#endif
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///////////////////////////////////////////////////////////////////////////////
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SkColorFilter* SkTableColorFilter::Create(const uint8_t table[256]) {
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return SkNEW_ARGS(SkTable_ColorFilter, (table, table, table, table));
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}
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SkColorFilter* SkTableColorFilter::CreateARGB(const uint8_t tableA[256],
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const uint8_t tableR[256],
|
||||
const uint8_t tableG[256],
|
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const uint8_t tableB[256]) {
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return SkNEW_ARGS(SkTable_ColorFilter, (tableA, tableR, tableG, tableB));
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}
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