211 lines
8.5 KiB
C++
211 lines
8.5 KiB
C++
/*
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* Copyright 2013 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 "sk_tool_utils.h"
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#include "SkArithmeticMode.h"
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#include "SkOffsetImageFilter.h"
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#include "SkXfermodeImageFilter.h"
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#include "SkBitmapSource.h"
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#define WIDTH 600
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#define HEIGHT 600
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#define MARGIN 12
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namespace skiagm {
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class XfermodeImageFilterGM : public GM {
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public:
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XfermodeImageFilterGM(){
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this->setBGColor(0xFF000000);
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}
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protected:
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SkString onShortName() SK_OVERRIDE {
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return SkString("xfermodeimagefilter");
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}
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void make_bitmap() {
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fBitmap.allocN32Pixels(80, 80);
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SkCanvas canvas(fBitmap);
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canvas.clear(0x00000000);
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SkPaint paint;
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paint.setAntiAlias(true);
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sk_tool_utils::set_portable_typeface(&paint);
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paint.setColor(0xD000D000);
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paint.setTextSize(SkIntToScalar(96));
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const char* str = "e";
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canvas.drawText(str, strlen(str), SkIntToScalar(15), SkIntToScalar(65), paint);
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}
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SkISize onISize() SK_OVERRIDE {
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return SkISize::Make(WIDTH, HEIGHT);
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}
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static void drawClippedBitmap(SkCanvas* canvas, const SkBitmap& bitmap, const SkPaint& paint,
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int x, int y) {
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas->clipRect(SkRect::MakeWH(
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SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height())));
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canvas->drawBitmap(bitmap, 0, 0, &paint);
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canvas->restore();
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}
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static void drawClippedPaint(SkCanvas* canvas, const SkRect& rect, const SkPaint& paint,
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int x, int y) {
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas->clipRect(rect);
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canvas->drawPaint(paint);
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canvas->restore();
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}
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void onOnceBeforeDraw() SK_OVERRIDE {
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make_bitmap();
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fCheckerboard.allocN32Pixels(80, 80);
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SkCanvas checkerboardCanvas(fCheckerboard);
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sk_tool_utils::draw_checkerboard(&checkerboardCanvas, 0xFFA0A0A0, 0xFF404040, 8);
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}
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void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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canvas->clear(0x00000000);
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SkPaint paint;
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const struct {
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SkXfermode::Mode fMode;
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const char* fLabel;
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} gModes[] = {
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{ SkXfermode::kClear_Mode, "Clear" },
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{ SkXfermode::kSrc_Mode, "Src" },
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{ SkXfermode::kDst_Mode, "Dst" },
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{ SkXfermode::kSrcOver_Mode, "SrcOver" },
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{ SkXfermode::kDstOver_Mode, "DstOver" },
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{ SkXfermode::kSrcIn_Mode, "SrcIn" },
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{ SkXfermode::kDstIn_Mode, "DstIn" },
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{ SkXfermode::kSrcOut_Mode, "SrcOut" },
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{ SkXfermode::kDstOut_Mode, "DstOut" },
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{ SkXfermode::kSrcATop_Mode, "SrcATop" },
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{ SkXfermode::kDstATop_Mode, "DstATop" },
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{ SkXfermode::kXor_Mode, "Xor" },
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{ SkXfermode::kPlus_Mode, "Plus" },
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{ SkXfermode::kModulate_Mode, "Modulate" },
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{ SkXfermode::kScreen_Mode, "Screen" },
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{ SkXfermode::kOverlay_Mode, "Overlay" },
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{ SkXfermode::kDarken_Mode, "Darken" },
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{ SkXfermode::kLighten_Mode, "Lighten" },
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{ SkXfermode::kColorDodge_Mode, "ColorDodge" },
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{ SkXfermode::kColorBurn_Mode, "ColorBurn" },
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{ SkXfermode::kHardLight_Mode, "HardLight" },
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{ SkXfermode::kSoftLight_Mode, "SoftLight" },
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{ SkXfermode::kDifference_Mode, "Difference" },
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{ SkXfermode::kExclusion_Mode, "Exclusion" },
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{ SkXfermode::kMultiply_Mode, "Multiply" },
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{ SkXfermode::kHue_Mode, "Hue" },
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{ SkXfermode::kSaturation_Mode, "Saturation" },
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{ SkXfermode::kColor_Mode, "Color" },
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{ SkXfermode::kLuminosity_Mode, "Luminosity" },
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};
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int x = 0, y = 0;
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SkAutoTUnref<SkImageFilter> background(SkBitmapSource::Create(fCheckerboard));
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for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) {
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SkAutoTUnref<SkXfermode> mode(SkXfermode::Create(gModes[i].fMode));
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SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background));
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paint.setImageFilter(filter);
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drawClippedBitmap(canvas, fBitmap, paint, x, y);
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x += fBitmap.width() + MARGIN;
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if (x + fBitmap.width() > WIDTH) {
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x = 0;
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y += fBitmap.height() + MARGIN;
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}
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}
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// Test arithmetic mode as image filter
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SkAutoTUnref<SkXfermode> mode(SkArithmeticMode::Create(0, SK_Scalar1, SK_Scalar1, 0));
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SkAutoTUnref<SkImageFilter> filter(SkXfermodeImageFilter::Create(mode, background));
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paint.setImageFilter(filter);
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drawClippedBitmap(canvas, fBitmap, paint, x, y);
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x += fBitmap.width() + MARGIN;
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if (x + fBitmap.width() > WIDTH) {
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x = 0;
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y += fBitmap.height() + MARGIN;
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}
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// Test NULL mode
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filter.reset(SkXfermodeImageFilter::Create(NULL, background));
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paint.setImageFilter(filter);
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drawClippedBitmap(canvas, fBitmap, paint, x, y);
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x += fBitmap.width() + MARGIN;
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if (x + fBitmap.width() > WIDTH) {
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x = 0;
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y += fBitmap.height() + MARGIN;
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}
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SkRect clipRect = SkRect::MakeWH(SkIntToScalar(fBitmap.width() + 4),
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SkIntToScalar(fBitmap.height() + 4));
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// Test offsets on SrcMode (uses fixed-function blend)
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SkAutoTUnref<SkImageFilter> foreground(SkBitmapSource::Create(fBitmap));
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SkAutoTUnref<SkImageFilter> offsetForeground(SkOffsetImageFilter::Create(
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SkIntToScalar(4), SkIntToScalar(-4), foreground));
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SkAutoTUnref<SkImageFilter> offsetBackground(SkOffsetImageFilter::Create(
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SkIntToScalar(4), SkIntToScalar(4), background));
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mode.reset(SkXfermode::Create(SkXfermode::kSrcOver_Mode));
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filter.reset(SkXfermodeImageFilter::Create(mode, offsetBackground, offsetForeground));
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paint.setImageFilter(filter);
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drawClippedPaint(canvas, clipRect, paint, x, y);
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x += fBitmap.width() + MARGIN;
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if (x + fBitmap.width() > WIDTH) {
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x = 0;
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y += fBitmap.height() + MARGIN;
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}
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// Test offsets on Darken (uses shader blend)
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mode.reset(SkXfermode::Create(SkXfermode::kDarken_Mode));
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filter.reset(SkXfermodeImageFilter::Create(mode, offsetBackground, offsetForeground));
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paint.setImageFilter(filter);
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drawClippedPaint(canvas, clipRect, paint, x, y);
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x += fBitmap.width() + MARGIN;
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if (x + fBitmap.width() > WIDTH) {
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x = 0;
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y += fBitmap.height() + MARGIN;
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}
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// Test cropping
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static const size_t nbSamples = 3;
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SkXfermode::Mode sampledModes[nbSamples] = {SkXfermode::kOverlay_Mode,
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SkXfermode::kSrcOver_Mode,
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SkXfermode::kPlus_Mode};
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int offsets[nbSamples][4] = {{ 10, 10, -16, -16},
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{ 10, 10, 10, 10},
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{-10, -10, -6, -6}};
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for (size_t i = 0; i < nbSamples; ++i) {
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SkIRect cropRect = SkIRect::MakeXYWH(offsets[i][0],
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offsets[i][1],
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fBitmap.width() + offsets[i][2],
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fBitmap.height() + offsets[i][3]);
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SkImageFilter::CropRect rect(SkRect::Make(cropRect));
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mode.reset(SkXfermode::Create(sampledModes[i]));
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filter.reset(SkXfermodeImageFilter::Create(
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mode, offsetBackground, offsetForeground, &rect));
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paint.setImageFilter(filter);
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drawClippedPaint(canvas, clipRect, paint, x, y);
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x += fBitmap.width() + MARGIN;
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if (x + fBitmap.width() > WIDTH) {
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x = 0;
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y += fBitmap.height() + MARGIN;
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}
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}
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}
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private:
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SkBitmap fBitmap, fCheckerboard;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new XfermodeImageFilterGM; );
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}
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