302 lines
11 KiB
C++
302 lines
11 KiB
C++
/*
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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/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkBlendMode.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTileMode.h"
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#include "include/core/SkTypeface.h"
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#include "include/core/SkTypes.h"
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#include "include/utils/SkTextUtils.h"
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#include "tools/ToolUtils.h"
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enum SrcType {
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//! A WxH image with a rectangle in the lower right.
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kRectangleImage_SrcType = 0x01,
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//! kRectangleImage_SrcType with an alpha of 34.5%.
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kRectangleImageWithAlpha_SrcType = 0x02,
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//! kRectnagleImageWithAlpha_SrcType scaled down by half.
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kSmallRectangleImageWithAlpha_SrcType = 0x04,
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//! kRectangleImage_SrcType drawn directly instead in an image.
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kRectangle_SrcType = 0x08,
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//! Two rectangles, first on the right half, second on the bottom half.
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kQuarterClear_SrcType = 0x10,
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//! kQuarterClear_SrcType in a layer.
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kQuarterClearInLayer_SrcType = 0x20,
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//! A W/2xH/2 transparent image.
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kSmallTransparentImage_SrcType = 0x40,
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//! kRectangleImage_SrcType drawn directly with a mask.
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kRectangleWithMask_SrcType = 0x80,
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kAll_SrcType = 0xFF, //!< All the source types.
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kBasic_SrcType = 0x03, //!< Just basic source types.
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};
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const struct {
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SkBlendMode fMode;
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int fSourceTypeMask; // The source types to use this
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// mode with. See draw_mode for
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// an explanation of each type.
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// PDF has to play some tricks
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// to support the base modes,
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// test those more extensively.
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} gModes[] = {
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{ SkBlendMode::kClear, kAll_SrcType },
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{ SkBlendMode::kSrc, kAll_SrcType },
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{ SkBlendMode::kDst, kAll_SrcType },
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{ SkBlendMode::kSrcOver, kAll_SrcType },
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{ SkBlendMode::kDstOver, kAll_SrcType },
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{ SkBlendMode::kSrcIn, kAll_SrcType },
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{ SkBlendMode::kDstIn, kAll_SrcType },
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{ SkBlendMode::kSrcOut, kAll_SrcType },
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{ SkBlendMode::kDstOut, kAll_SrcType },
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{ SkBlendMode::kSrcATop, kAll_SrcType },
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{ SkBlendMode::kDstATop, kAll_SrcType },
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{ SkBlendMode::kXor, kBasic_SrcType },
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{ SkBlendMode::kPlus, kBasic_SrcType },
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{ SkBlendMode::kModulate, kAll_SrcType },
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{ SkBlendMode::kScreen, kBasic_SrcType },
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{ SkBlendMode::kOverlay, kBasic_SrcType },
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{ SkBlendMode::kDarken, kBasic_SrcType },
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{ SkBlendMode::kLighten, kBasic_SrcType },
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{ SkBlendMode::kColorDodge, kBasic_SrcType },
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{ SkBlendMode::kColorBurn, kBasic_SrcType },
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{ SkBlendMode::kHardLight, kBasic_SrcType },
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{ SkBlendMode::kSoftLight, kBasic_SrcType },
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{ SkBlendMode::kDifference, kBasic_SrcType },
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{ SkBlendMode::kExclusion, kBasic_SrcType },
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{ SkBlendMode::kMultiply, kAll_SrcType },
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{ SkBlendMode::kHue, kBasic_SrcType },
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{ SkBlendMode::kSaturation, kBasic_SrcType },
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{ SkBlendMode::kColor, kBasic_SrcType },
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{ SkBlendMode::kLuminosity, kBasic_SrcType },
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};
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static void make_bitmaps(int w, int h, SkBitmap* src, SkBitmap* dst,
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SkBitmap* transparent) {
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src->allocN32Pixels(w, h);
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src->eraseColor(SK_ColorTRANSPARENT);
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SkPaint p;
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p.setAntiAlias(true);
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SkRect r;
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SkScalar ww = SkIntToScalar(w);
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SkScalar hh = SkIntToScalar(h);
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{
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SkCanvas c(*src);
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p.setColor(ToolUtils::color_to_565(0xFFFFCC44));
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r.setWH(ww*3/4, hh*3/4);
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c.drawOval(r, p);
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}
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dst->allocN32Pixels(w, h);
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dst->eraseColor(SK_ColorTRANSPARENT);
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{
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SkCanvas c(*dst);
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p.setColor(ToolUtils::color_to_565(0xFF66AAFF));
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r.setLTRB(ww/3, hh/3, ww*19/20, hh*19/20);
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c.drawRect(r, p);
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}
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transparent->allocN32Pixels(w, h);
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transparent->eraseColor(SK_ColorTRANSPARENT);
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}
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static uint16_t gData[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF };
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class XfermodesGM : public skiagm::GM {
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SkBitmap fBG;
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SkBitmap fSrcB, fDstB, fTransparent;
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/* The srcType argument indicates what to draw for the source part. Skia
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* uses the implied shape of the drawing command and these modes
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* demonstrate that.
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*/
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void draw_mode(SkCanvas* canvas, SkBlendMode mode, SrcType srcType, SkScalar x, SkScalar y) {
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SkPaint p;
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SkSamplingOptions sampling;
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SkMatrix m;
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bool restoreNeeded = false;
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m.setTranslate(x, y);
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canvas->drawImage(fSrcB.asImage(), x, y, sampling, &p);
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p.setBlendMode(mode);
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switch (srcType) {
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case kSmallTransparentImage_SrcType: {
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m.postScale(SK_ScalarHalf, SK_ScalarHalf, x, y);
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SkAutoCanvasRestore acr(canvas, true);
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canvas->concat(m);
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canvas->drawImage(fTransparent.asImage(), 0, 0, sampling, &p);
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break;
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}
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case kQuarterClearInLayer_SrcType: {
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SkRect bounds = SkRect::MakeXYWH(x, y, SkIntToScalar(W),
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SkIntToScalar(H));
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canvas->saveLayer(&bounds, &p);
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restoreNeeded = true;
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p.setBlendMode(SkBlendMode::kSrcOver);
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[[fallthrough]];
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}
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case kQuarterClear_SrcType: {
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SkScalar halfW = SkIntToScalar(W) / 2;
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SkScalar halfH = SkIntToScalar(H) / 2;
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p.setColor(ToolUtils::color_to_565(0xFF66AAFF));
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SkRect r = SkRect::MakeXYWH(x + halfW, y, halfW,
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SkIntToScalar(H));
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canvas->drawRect(r, p);
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p.setColor(ToolUtils::color_to_565(0xFFAA66FF));
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r = SkRect::MakeXYWH(x, y + halfH, SkIntToScalar(W), halfH);
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canvas->drawRect(r, p);
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break;
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}
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case kRectangleWithMask_SrcType: {
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canvas->save();
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restoreNeeded = true;
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SkScalar w = SkIntToScalar(W);
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SkScalar h = SkIntToScalar(H);
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SkRect r = SkRect::MakeXYWH(x, y + h / 4, w, h * 23 / 60);
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canvas->clipRect(r);
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[[fallthrough]];
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}
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case kRectangle_SrcType: {
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SkScalar w = SkIntToScalar(W);
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SkScalar h = SkIntToScalar(H);
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SkRect r = SkRect::MakeXYWH(x + w / 3, y + h / 3,
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w * 37 / 60, h * 37 / 60);
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p.setColor(ToolUtils::color_to_565(0xFF66AAFF));
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canvas->drawRect(r, p);
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break;
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}
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case kSmallRectangleImageWithAlpha_SrcType:
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m.postScale(SK_ScalarHalf, SK_ScalarHalf, x, y);
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[[fallthrough]];
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case kRectangleImageWithAlpha_SrcType:
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p.setAlpha(0x88);
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[[fallthrough]];
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case kRectangleImage_SrcType: {
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SkAutoCanvasRestore acr(canvas, true);
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canvas->concat(m);
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canvas->drawImage(fDstB.asImage(), 0, 0, sampling, &p);
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break;
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}
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default:
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break;
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}
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if (restoreNeeded) {
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canvas->restore();
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}
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}
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void onOnceBeforeDraw() override {
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fBG.installPixels(SkImageInfo::Make(2, 2, kARGB_4444_SkColorType,
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kOpaque_SkAlphaType),
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gData, 4);
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make_bitmaps(W, H, &fSrcB, &fDstB, &fTransparent);
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}
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public:
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const static int W = 64;
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const static int H = 64;
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XfermodesGM() {}
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protected:
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SkString onShortName() override {
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return SkString("xfermodes");
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}
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SkISize onISize() override {
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return SkISize::Make(1990, 570);
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
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const SkScalar w = SkIntToScalar(W);
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const SkScalar h = SkIntToScalar(H);
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SkMatrix m;
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m.setScale(SkIntToScalar(6), SkIntToScalar(6));
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auto s = fBG.makeShader(SkTileMode::kRepeat, SkTileMode::kRepeat,
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SkSamplingOptions(), m);
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SkPaint labelP;
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labelP.setAntiAlias(true);
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SkFont font(ToolUtils::create_portable_typeface());
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const int kWrap = 5;
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SkScalar x0 = 0;
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SkScalar y0 = 0;
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for (int sourceType = 1; sourceType & kAll_SrcType; sourceType <<= 1) {
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SkScalar x = x0, y = y0;
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for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) {
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if ((gModes[i].fSourceTypeMask & sourceType) == 0) {
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continue;
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}
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SkRect r{ x, y, x+w, y+h };
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SkPaint p;
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p.setStyle(SkPaint::kFill_Style);
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p.setShader(s);
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canvas->drawRect(r, p);
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canvas->saveLayer(&r, nullptr);
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draw_mode(canvas, gModes[i].fMode, static_cast<SrcType>(sourceType),
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r.fLeft, r.fTop);
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canvas->restore();
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r.inset(-SK_ScalarHalf, -SK_ScalarHalf);
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p.setStyle(SkPaint::kStroke_Style);
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p.setShader(nullptr);
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canvas->drawRect(r, p);
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#if 1
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const char* label = SkBlendMode_Name(gModes[i].fMode);
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SkTextUtils::DrawString(canvas, label, x + w/2, y - font.getSize()/2,
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font, labelP, SkTextUtils::kCenter_Align);
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#endif
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x += w + SkIntToScalar(10);
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if ((i % kWrap) == kWrap - 1) {
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x = x0;
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y += h + SkIntToScalar(30);
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}
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}
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if (y < 320) {
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if (x > x0) {
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y += h + SkIntToScalar(30);
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}
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y0 = y;
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} else {
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x0 += SkIntToScalar(400);
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y0 = 0;
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}
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}
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}
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private:
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using INHERITED = GM;
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};
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DEF_GM( return new XfermodesGM; )
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