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- /*
- * Copyright 2011 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkBlendMode.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPoint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkShader.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "include/core/SkTileMode.h"
- #include "include/core/SkTypes.h"
- #include "include/effects/SkGradientShader.h"
- static void make_bitmap(SkBitmap* bitmap) {
- bitmap->allocN32Pixels(64, 64);
- SkCanvas canvas(*bitmap);
- canvas.drawColor(SK_ColorRED);
- SkPaint paint;
- paint.setAntiAlias(true);
- const SkPoint pts[] = { { 0, 0 }, { 64, 64 } };
- const SkColor colors[] = { SK_ColorWHITE, SK_ColorBLUE };
- paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kClamp));
- canvas.drawCircle(32, 32, 32, paint);
- }
- class DrawBitmapRect2 : public skiagm::GM {
- bool fUseIRect;
- public:
- DrawBitmapRect2(bool useIRect) : fUseIRect(useIRect) {
- }
- protected:
- SkString onShortName() override {
- SkString str;
- str.printf("bitmaprect_%s", fUseIRect ? "i" : "s");
- return str;
- }
- SkISize onISize() override {
- return SkISize::Make(640, 480);
- }
- void onDraw(SkCanvas* canvas) override {
- canvas->drawColor(0xFFCCCCCC);
- const SkIRect src[] = {
- { 0, 0, 32, 32 },
- { 0, 0, 80, 80 },
- { 32, 32, 96, 96 },
- { -32, -32, 32, 32, }
- };
- SkPaint paint;
- paint.setStyle(SkPaint::kStroke_Style);
- SkBitmap bitmap;
- make_bitmap(&bitmap);
- SkRect dstR = { 0, 200, 128, 380 };
- canvas->translate(16, 40);
- for (size_t i = 0; i < SK_ARRAY_COUNT(src); i++) {
- SkRect srcR;
- srcR.set(src[i]);
- canvas->drawBitmap(bitmap, 0, 0, &paint);
- if (!fUseIRect) {
- canvas->drawBitmapRect(bitmap, srcR, dstR, &paint,
- SkCanvas::kStrict_SrcRectConstraint);
- } else {
- canvas->drawBitmapRect(bitmap, src[i], dstR, &paint);
- }
- canvas->drawRect(dstR, paint);
- canvas->drawRect(srcR, paint);
- canvas->translate(160, 0);
- }
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- static void make_3x3_bitmap(SkBitmap* bitmap) {
- const int xSize = 3;
- const int ySize = 3;
- const SkColor textureData[xSize][ySize] = {
- { SK_ColorRED, SK_ColorWHITE, SK_ColorBLUE },
- { SK_ColorGREEN, SK_ColorBLACK, SK_ColorCYAN },
- { SK_ColorYELLOW, SK_ColorGRAY, SK_ColorMAGENTA }
- };
- bitmap->allocN32Pixels(xSize, ySize, true);
- SkCanvas canvas(*bitmap);
- SkPaint paint;
- for (int y = 0; y < ySize; y++) {
- for (int x = 0; x < xSize; x++) {
- paint.setColor(textureData[x][y]);
- canvas.drawIRect(SkIRect::MakeXYWH(x, y, 1, 1), paint);
- }
- }
- }
- // This GM attempts to make visible any issues drawBitmapRect may have
- // with partial source rects. In this case the eight pixels on the border
- // should be half the width/height of the central pixel, i.e.:
- // __|____|__
- // | |
- // __|____|__
- // | |
- class DrawBitmapRect3 : public skiagm::GM {
- public:
- DrawBitmapRect3() {
- this->setBGColor(SK_ColorBLACK);
- }
- protected:
- SkString onShortName() override {
- SkString str;
- str.printf("3x3bitmaprect");
- return str;
- }
- SkISize onISize() override {
- return SkISize::Make(640, 480);
- }
- void onDraw(SkCanvas* canvas) override {
- SkBitmap bitmap;
- make_3x3_bitmap(&bitmap);
- SkRect srcR = { 0.5f, 0.5f, 2.5f, 2.5f };
- SkRect dstR = { 100, 100, 300, 200 };
- canvas->drawBitmapRect(bitmap, srcR, dstR, nullptr, SkCanvas::kStrict_SrcRectConstraint);
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- //////////////////////////////////////////////////////////////////////////////
- static void make_big_bitmap(SkBitmap* bitmap) {
- constexpr int gXSize = 4096;
- constexpr int gYSize = 4096;
- constexpr int gBorderWidth = 10;
- bitmap->allocN32Pixels(gXSize, gYSize);
- for (int y = 0; y < gYSize; ++y) {
- for (int x = 0; x < gXSize; ++x) {
- if (x <= gBorderWidth || x >= gXSize-gBorderWidth ||
- y <= gBorderWidth || y >= gYSize-gBorderWidth) {
- *bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FFFFFF);
- } else {
- *bitmap->getAddr32(x, y) = SkPreMultiplyColor(0x88FF0000);
- }
- }
- }
- }
- // This GM attempts to reveal any issues we may have when the GPU has to
- // break up a large texture in order to draw it. The XOR transfer mode will
- // create stripes in the image if there is imprecision in the destination
- // tile placement.
- class DrawBitmapRect4 : public skiagm::GM {
- bool fUseIRect;
- SkBitmap fBigBitmap;
- public:
- DrawBitmapRect4(bool useIRect) : fUseIRect(useIRect) {
- this->setBGColor(0x88444444);
- }
- protected:
- SkString onShortName() override {
- SkString str;
- str.printf("bigbitmaprect_%s", fUseIRect ? "i" : "s");
- return str;
- }
- SkISize onISize() override {
- return SkISize::Make(640, 480);
- }
- void onOnceBeforeDraw() override {
- make_big_bitmap(&fBigBitmap);
- }
- void onDraw(SkCanvas* canvas) override {
- SkPaint paint;
- paint.setAlpha(128);
- paint.setBlendMode(SkBlendMode::kXor);
- SkRect srcR1 = { 0.0f, 0.0f, 4096.0f, 2040.0f };
- SkRect dstR1 = { 10.1f, 10.1f, 629.9f, 400.9f };
- SkRect srcR2 = { 4085.0f, 10.0f, 4087.0f, 12.0f };
- SkRect dstR2 = { 10, 410, 30, 430 };
- if (!fUseIRect) {
- canvas->drawBitmapRect(fBigBitmap, srcR1, dstR1, &paint,
- SkCanvas::kStrict_SrcRectConstraint);
- canvas->drawBitmapRect(fBigBitmap, srcR2, dstR2, &paint,
- SkCanvas::kStrict_SrcRectConstraint);
- } else {
- canvas->drawBitmapRect(fBigBitmap, srcR1.roundOut(), dstR1, &paint);
- canvas->drawBitmapRect(fBigBitmap, srcR2.roundOut(), dstR2, &paint);
- }
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- class BitmapRectRounding : public skiagm::GM {
- SkBitmap fBM;
- public:
- BitmapRectRounding() {}
- protected:
- SkString onShortName() override {
- SkString str;
- str.printf("bitmaprect_rounding");
- return str;
- }
- SkISize onISize() override {
- return SkISize::Make(640, 480);
- }
- void onOnceBeforeDraw() override {
- fBM.allocN32Pixels(10, 10);
- fBM.eraseColor(SK_ColorBLUE);
- }
- // This choice of coordinates and matrix land the bottom edge of the clip (and bitmap dst)
- // at exactly 1/2 pixel boundary. However, drawBitmapRect may lose precision along the way.
- // If it does, we may see a red-line at the bottom, instead of the bitmap exactly matching
- // the clip (in which case we should see all blue).
- // The correct image should be all blue.
- void onDraw(SkCanvas* canvas) override {
- SkPaint paint;
- paint.setColor(SK_ColorRED);
- const SkRect r = SkRect::MakeXYWH(1, 1, 110, 114);
- canvas->scale(0.9f, 0.9f);
- // the drawRect shows the same problem as clipRect(r) followed by drawcolor(red)
- canvas->drawRect(r, paint);
- canvas->drawBitmapRect(fBM, r, nullptr);
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- DEF_GM( return new BitmapRectRounding; )
- //////////////////////////////////////////////////////////////////////////////
- DEF_GM( return new DrawBitmapRect2(false); )
- DEF_GM( return new DrawBitmapRect2(true); )
- DEF_GM( return new DrawBitmapRect3(); )
- #ifndef SK_BUILD_FOR_ANDROID
- DEF_GM( return new DrawBitmapRect4(false); )
- DEF_GM( return new DrawBitmapRect4(true); )
- #endif
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