123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292 |
- /*
- * 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/SkBlendMode.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkMatrix.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkPath.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkSize.h"
- #include "include/core/SkString.h"
- #include "src/core/SkCanvasPriv.h"
- #include "tools/ToolUtils.h"
- static void do_draw(SkCanvas* canvas, const SkRect& r) {
- SkPaint paint;
- paint.setBlendMode(SkBlendMode::kSrc);
- paint.setColor(0x800000FF);
- canvas->drawRect(r, paint);
- }
- /**
- * Exercise SkCanvasPriv::kDontClipToLayer_SaveLayerFlag flag, which does not limit the clip to the
- * layer's bounds. Thus when a draw occurs, it can (depending on "where" it is) draw into the layer
- * and/or draw onto the surrounding portions of the canvas, or both.
- *
- * This GM has a 100x100 rectangle (r), which its going to draw. However first it creates a layer
- * with this flag covering 1/2 of the rectangle (upper half). Then it draws the rect in SRC mode.
- *
- * The portion of the draw that intersects the layer should see the SRC draw, apply it to the layer
- * and then during restore, it will SRC_OVER that layer onto the canvas (SRC_OVER since the layer
- * has no paint, so it gets the default xfermode during restore).
- *
- * Note: when we talk about drawing directly into the "canvas", in fact we are drawing into an
- * "outer" layer we created (filled with red). This is a testing detail, so that our final
- * output image is itself opaque, otherwise we make it harder to view the GM as a PNG.
- *
- * The portion of the draw below the layer draws directly into the canvas. Since it is in SRC mode,
- * it will write 0x80 to the canvas' alpha, overwriting the "red", which then gets blended with
- * the GM's white background.
- *
- * The portion in the layer, will end up SRC_OVERing the 0x80 layer pixels onto the canvas' red
- * pixels, making magenta.
- *
- * Thus the expected result is the upper half to be magenta 0xFF7F0080, and the lower half to be
- * light blue 0xFF7F7FFF.
- */
- DEF_SIMPLE_GM(dont_clip_to_layer, canvas, 120, 120) {
- const SkRect r { 10, 10, 110, 110 };
- // Wrap the entire test inside a red layer, so we don't punch the actual gm's alpha with
- // kSrc_Mode, which makes it hard to view (we like our GMs to have opaque pixels).
- canvas->saveLayer(&r, nullptr);
- canvas->drawColor(SK_ColorRED);
- SkRect r0 = { 20, 20, 100, 55 };
- SkRect r1 = { 20, 65, 100, 100 };
- SkCanvas::SaveLayerRec rec;
- rec.fPaint = nullptr;
- rec.fBounds = &r0;
- rec.fBackdrop = nullptr;
- rec.fSaveLayerFlags = SkCanvasPriv::kDontClipToLayer_SaveLayerFlag;
- canvas->saveLayer(rec);
- rec.fBounds = &r1;
- canvas->saveLayer(rec);
- do_draw(canvas, r);
- canvas->restore();
- canvas->restore();
- canvas->restore(); // red-layer
- }
- /** Draw a 2px border around the target, then red behind the target;
- set the clip to match the target, then draw >> the target in blue.
- */
- static void draw(SkCanvas* canvas, SkRect& target, int x, int y) {
- SkPaint borderPaint;
- borderPaint.setColor(SkColorSetRGB(0x0, 0xDD, 0x0));
- borderPaint.setAntiAlias(true);
- SkPaint backgroundPaint;
- backgroundPaint.setColor(SkColorSetRGB(0xDD, 0x0, 0x0));
- backgroundPaint.setAntiAlias(true);
- SkPaint foregroundPaint;
- foregroundPaint.setColor(SkColorSetRGB(0x0, 0x0, 0xDD));
- foregroundPaint.setAntiAlias(true);
- canvas->save();
- canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
- target.inset(SkIntToScalar(-2), SkIntToScalar(-2));
- canvas->drawRect(target, borderPaint);
- target.inset(SkIntToScalar(2), SkIntToScalar(2));
- canvas->drawRect(target, backgroundPaint);
- canvas->clipRect(target, true);
- target.inset(SkIntToScalar(-4), SkIntToScalar(-4));
- canvas->drawRect(target, foregroundPaint);
- canvas->restore();
- }
- static void draw_square(SkCanvas* canvas, int x, int y) {
- SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 10 * SK_Scalar1));
- draw(canvas, target, x, y);
- }
- static void draw_column(SkCanvas* canvas, int x, int y) {
- SkRect target (SkRect::MakeWH(1 * SK_Scalar1, 10 * SK_Scalar1));
- draw(canvas, target, x, y);
- }
- static void draw_bar(SkCanvas* canvas, int x, int y) {
- SkRect target (SkRect::MakeWH(10 * SK_Scalar1, 1 * SK_Scalar1));
- draw(canvas, target, x, y);
- }
- static void draw_rect_tests(SkCanvas* canvas) {
- draw_square(canvas, 10, 10);
- draw_column(canvas, 30, 10);
- draw_bar(canvas, 10, 30);
- }
- /**
- Test a set of clipping problems discovered while writing blitAntiRect,
- and test all the code paths through the clipping blitters.
- Each region should show as a blue center surrounded by a 2px green
- border, with no red.
- */
- DEF_SIMPLE_GM(aaclip, canvas, 240, 120) {
- // Initial pixel-boundary-aligned draw
- draw_rect_tests(canvas);
- // Repeat 4x with .2, .4, .6, .8 px offsets
- canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
- canvas->translate(SkIntToScalar(50), 0);
- draw_rect_tests(canvas);
- canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
- canvas->translate(SkIntToScalar(50), 0);
- draw_rect_tests(canvas);
- canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
- canvas->translate(SkIntToScalar(50), 0);
- draw_rect_tests(canvas);
- canvas->translate(SK_Scalar1 / 5, SK_Scalar1 / 5);
- canvas->translate(SkIntToScalar(50), 0);
- draw_rect_tests(canvas);
- }
- /////////////////////////////////////////////////////////////////////////
- #ifdef SK_BUILD_FOR_MAC
- #include "include/utils/mac/SkCGUtils.h"
- #include "src/core/SkMakeUnique.h"
- static std::unique_ptr<SkCanvas> make_canvas(const SkBitmap& bm) {
- const SkImageInfo& info = bm.info();
- if (info.bytesPerPixel() == 4) {
- return SkCanvas::MakeRasterDirectN32(info.width(), info.height(),
- (SkPMColor*)bm.getPixels(),
- bm.rowBytes());
- } else {
- return skstd::make_unique<SkCanvas>(bm);
- }
- }
- static void test_image(SkCanvas* canvas, const SkImageInfo& info) {
- SkBitmap bm;
- bm.allocPixels(info);
- if (info.isOpaque()) {
- bm.eraseColor(SK_ColorGREEN);
- } else {
- bm.eraseColor(0);
- }
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setColor(SK_ColorBLUE);
- make_canvas(bm)->drawCircle(50, 50, 49, paint);
- canvas->drawBitmap(bm, 10, 10);
- CGImageRef image = SkCreateCGImageRefWithColorspace(bm, nullptr);
- SkBitmap bm2;
- SkCreateBitmapFromCGImage(&bm2, image);
- canvas->drawBitmap(bm2, 10, 120);
- canvas->drawImage(SkMakeImageFromCGImage(image), 10, 120 + bm2.height() + 10);
- CGImageRelease(image);
- }
- DEF_SIMPLE_GM(cgimage, canvas, 800, 250) {
- const struct {
- SkColorType fCT;
- SkAlphaType fAT;
- } rec[] = {
- { kRGB_565_SkColorType, kOpaque_SkAlphaType },
- { kRGBA_8888_SkColorType, kPremul_SkAlphaType },
- { kRGBA_8888_SkColorType, kUnpremul_SkAlphaType },
- { kRGBA_8888_SkColorType, kOpaque_SkAlphaType },
- { kBGRA_8888_SkColorType, kPremul_SkAlphaType },
- { kBGRA_8888_SkColorType, kUnpremul_SkAlphaType },
- { kBGRA_8888_SkColorType, kOpaque_SkAlphaType },
- };
- for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
- SkImageInfo info = SkImageInfo::Make(100, 100, rec[i].fCT, rec[i].fAT);
- test_image(canvas, info);
- canvas->translate(info.width() + 10, 0);
- }
- }
- #endif
- ///////////////////////////////////////////////////////////////////////////////////////////////////
- // https://bug.skia.org/3716
- class ClipCubicGM : public skiagm::GM {
- const SkScalar W = 100;
- const SkScalar H = 240;
- SkPath fVPath, fHPath;
- public:
- ClipCubicGM() {
- fVPath.moveTo(W, 0);
- fVPath.cubicTo(W, H-10, 0, 10, 0, H);
- SkMatrix pivot;
- pivot.setRotate(90, W/2, H/2);
- fVPath.transform(pivot, &fHPath);
- }
- protected:
- SkString onShortName() override {
- return SkString("clipcubic");
- }
- SkISize onISize() override {
- return SkISize::Make(400, 410);
- }
- void doDraw(SkCanvas* canvas, const SkPath& path) {
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setColor(0xFFCCCCCC);
- canvas->drawPath(path, paint);
- paint.setColor(SK_ColorRED);
- paint.setStyle(SkPaint::kStroke_Style);
- canvas->drawPath(path, paint);
- }
- void drawAndClip(SkCanvas* canvas, const SkPath& path, SkScalar dx, SkScalar dy) {
- SkAutoCanvasRestore acr(canvas, true);
- SkRect r = SkRect::MakeXYWH(0, H/4, W, H/2);
- SkPaint paint;
- paint.setColor(ToolUtils::color_to_565(0xFF8888FF));
- canvas->drawRect(r, paint);
- this->doDraw(canvas, path);
- canvas->translate(dx, dy);
- canvas->drawRect(r, paint);
- canvas->clipRect(r);
- this->doDraw(canvas, path);
- }
- void onDraw(SkCanvas* canvas) override {
- canvas->translate(80, 10);
- this->drawAndClip(canvas, fVPath, 200, 0);
- canvas->translate(0, 200);
- this->drawAndClip(canvas, fHPath, 200, 0);
- }
- private:
- typedef skiagm::GM INHERITED;
- };
- DEF_GM(return new ClipCubicGM;)
|