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- /*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkRRect.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRegion.h"
- #include "include/core/SkScalar.h"
- #include "include/core/SkTypes.h"
- #include "include/private/SkTDArray.h"
- #include "include/utils/SkCanvasStateUtils.h"
- #include "src/core/SkCanvasPriv.h"
- #include "src/core/SkClipOpPriv.h"
- #include "src/core/SkTLazy.h"
- #include "tests/CanvasStateHelpers.h"
- #include "tests/Test.h"
- #include "tools/flags/CommandLineFlags.h"
- #include <cstring>
- class SkCanvasState;
- // dlopen and the library flag are only used for tests which require this flag.
- #ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
- #include <dlfcn.h>
- static DEFINE_string(library, "",
- "Support library to use for CanvasState test. If empty (the default), "
- "the test will be run without crossing a library boundary. Otherwise, "
- "it is expected to be a full path to a shared library file, which will"
- " be dynamically loaded. Functions from the library will be called to "
- "test SkCanvasState. Instructions for generating the library are in "
- "gyp/canvas_state_lib.gyp");
- // This class calls dlopen on the library passed in to the command line flag library, and handles
- // calling dlclose when it goes out of scope.
- class OpenLibResult {
- public:
- // If the flag library was passed to this run of the test, attempt to open it using dlopen and
- // report whether it succeeded.
- OpenLibResult(skiatest::Reporter* reporter) {
- if (FLAGS_library.count() == 1) {
- fHandle = dlopen(FLAGS_library[0], RTLD_LAZY | RTLD_LOCAL);
- REPORTER_ASSERT(reporter, fHandle != nullptr, "Failed to open library!");
- } else {
- fHandle = nullptr;
- }
- }
- // Automatically call dlclose when going out of scope.
- ~OpenLibResult() {
- if (fHandle) {
- dlclose(fHandle);
- }
- }
- // Pointer to the shared library object.
- void* handle() { return fHandle; }
- private:
- void* fHandle;
- };
- DEF_TEST(CanvasState_test_complex_layers, reporter) {
- const int WIDTH = 400;
- const int HEIGHT = 400;
- const int SPACER = 10;
- SkRect rect = SkRect::MakeXYWH(SkIntToScalar(SPACER), SkIntToScalar(SPACER),
- SkIntToScalar(WIDTH-(2*SPACER)),
- SkIntToScalar((HEIGHT-(2*SPACER)) / 7));
- const SkColorType colorTypes[] = {
- kRGB_565_SkColorType, kN32_SkColorType
- };
- const int layerAlpha[] = { 255, 255, 0 };
- const SkCanvas::SaveLayerFlags flags[] = {
- static_cast<SkCanvas::SaveLayerFlags>(SkCanvasPriv::kDontClipToLayer_SaveLayerFlag),
- 0,
- static_cast<SkCanvas::SaveLayerFlags>(SkCanvasPriv::kDontClipToLayer_SaveLayerFlag),
- };
- REPORTER_ASSERT(reporter, sizeof(layerAlpha) == sizeof(flags));
- bool (*drawFn)(SkCanvasState* state, float l, float t,
- float r, float b, int32_t s);
- OpenLibResult openLibResult(reporter);
- if (openLibResult.handle() != nullptr) {
- *(void**) (&drawFn) = dlsym(openLibResult.handle(),
- "complex_layers_draw_from_canvas_state");
- } else {
- drawFn = complex_layers_draw_from_canvas_state;
- }
- REPORTER_ASSERT(reporter, drawFn);
- if (!drawFn) {
- return;
- }
- for (size_t i = 0; i < SK_ARRAY_COUNT(colorTypes); ++i) {
- SkBitmap bitmaps[2];
- for (int j = 0; j < 2; ++j) {
- bitmaps[j].allocPixels(SkImageInfo::Make(WIDTH, HEIGHT,
- colorTypes[i],
- kPremul_SkAlphaType));
- SkCanvas canvas(bitmaps[j]);
- canvas.drawColor(SK_ColorRED);
- for (size_t k = 0; k < SK_ARRAY_COUNT(layerAlpha); ++k) {
- SkTLazy<SkPaint> paint;
- if (layerAlpha[k] != 0xFF) {
- paint.init()->setAlpha(layerAlpha[k]);
- }
- // draw a rect within the layer's bounds and again outside the layer's bounds
- canvas.saveLayer(SkCanvas::SaveLayerRec(&rect, paint.getMaybeNull(), flags[k]));
- if (j) {
- // Capture from the first Skia.
- SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
- REPORTER_ASSERT(reporter, state);
- // And draw to it in the second Skia.
- bool success = complex_layers_draw_from_canvas_state(state,
- rect.fLeft, rect.fTop, rect.fRight, rect.fBottom, SPACER);
- REPORTER_ASSERT(reporter, success);
- // And release it in the *first* Skia.
- SkCanvasStateUtils::ReleaseCanvasState(state);
- } else {
- // Draw in the first Skia.
- complex_layers_draw(&canvas, rect.fLeft, rect.fTop,
- rect.fRight, rect.fBottom, SPACER);
- }
- canvas.restore();
- // translate the canvas for the next iteration
- canvas.translate(0, 2*(rect.height() + SPACER));
- }
- }
- // now we memcmp the two bitmaps
- REPORTER_ASSERT(reporter, bitmaps[0].computeByteSize() == bitmaps[1].computeByteSize());
- REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
- bitmaps[1].getPixels(),
- bitmaps[0].computeByteSize()));
- }
- }
- #endif
- ////////////////////////////////////////////////////////////////////////////////
- #ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
- DEF_TEST(CanvasState_test_complex_clips, reporter) {
- const int WIDTH = 400;
- const int HEIGHT = 400;
- const int SPACER = 10;
- SkIRect layerRect = SkIRect::MakeWH(WIDTH, HEIGHT / 4);
- layerRect.inset(2*SPACER, 2*SPACER);
- SkIRect clipRect = layerRect;
- clipRect.fRight = clipRect.fLeft + (clipRect.width() / 2) - (2*SPACER);
- clipRect.outset(SPACER, SPACER);
- SkIRect regionBounds = clipRect;
- regionBounds.offset(clipRect.width() + (2*SPACER), 0);
- SkIRect regionInterior = regionBounds;
- regionInterior.inset(SPACER*3, SPACER*3);
- SkRegion clipRegion;
- clipRegion.setRect(regionBounds);
- clipRegion.op(regionInterior, SkRegion::kDifference_Op);
- const SkRegion::Op clipOps[] = { SkRegion::kIntersect_Op,
- SkRegion::kIntersect_Op,
- SkRegion::kReplace_Op,
- };
- const SkCanvas::SaveLayerFlags flags[] = {
- static_cast<SkCanvas::SaveLayerFlags>(SkCanvasPriv::kDontClipToLayer_SaveLayerFlag),
- 0,
- static_cast<SkCanvas::SaveLayerFlags>(SkCanvasPriv::kDontClipToLayer_SaveLayerFlag),
- };
- REPORTER_ASSERT(reporter, sizeof(clipOps) == sizeof(flags));
- bool (*drawFn)(SkCanvasState* state, int32_t l, int32_t t,
- int32_t r, int32_t b, int32_t clipOp,
- int32_t regionRects, int32_t* rectCoords);
- OpenLibResult openLibResult(reporter);
- if (openLibResult.handle() != nullptr) {
- *(void**) (&drawFn) = dlsym(openLibResult.handle(),
- "complex_clips_draw_from_canvas_state");
- } else {
- drawFn = complex_clips_draw_from_canvas_state;
- }
- REPORTER_ASSERT(reporter, drawFn);
- if (!drawFn) {
- return;
- }
- SkBitmap bitmaps[2];
- for (int i = 0; i < 2; ++i) {
- bitmaps[i].allocN32Pixels(WIDTH, HEIGHT);
- SkCanvas canvas(bitmaps[i]);
- canvas.drawColor(SK_ColorRED);
- SkRegion localRegion = clipRegion;
- SkPaint paint;
- paint.setAlpha(128);
- for (size_t j = 0; j < SK_ARRAY_COUNT(flags); ++j) {
- SkRect layerBounds = SkRect::Make(layerRect);
- canvas.saveLayer(SkCanvas::SaveLayerRec(&layerBounds, &paint, flags[j]));
- if (i) {
- SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
- REPORTER_ASSERT(reporter, state);
- SkRegion::Iterator iter(localRegion);
- SkTDArray<int32_t> rectCoords;
- for (; !iter.done(); iter.next()) {
- const SkIRect& rect = iter.rect();
- *rectCoords.append() = rect.fLeft;
- *rectCoords.append() = rect.fTop;
- *rectCoords.append() = rect.fRight;
- *rectCoords.append() = rect.fBottom;
- }
- bool success = drawFn(state, clipRect.fLeft, clipRect.fTop,
- clipRect.fRight, clipRect.fBottom, clipOps[j],
- rectCoords.count() / 4, rectCoords.begin());
- REPORTER_ASSERT(reporter, success);
- SkCanvasStateUtils::ReleaseCanvasState(state);
- } else {
- complex_clips_draw(&canvas, clipRect.fLeft, clipRect.fTop,
- clipRect.fRight, clipRect.fBottom, clipOps[j],
- localRegion);
- }
- canvas.restore();
- // translate the canvas and region for the next iteration
- canvas.translate(0, SkIntToScalar(2*(layerRect.height() + (SPACER))));
- localRegion.translate(0, 2*(layerRect.height() + SPACER));
- }
- }
- // now we memcmp the two bitmaps
- REPORTER_ASSERT(reporter, bitmaps[0].computeByteSize() == bitmaps[1].computeByteSize());
- REPORTER_ASSERT(reporter, !memcmp(bitmaps[0].getPixels(),
- bitmaps[1].getPixels(),
- bitmaps[0].computeByteSize()));
- }
- #endif
- ////////////////////////////////////////////////////////////////////////////////
- DEF_TEST(CanvasState_test_soft_clips, reporter) {
- SkBitmap bitmap;
- bitmap.allocN32Pixels(10, 10);
- SkCanvas canvas(bitmap);
- SkRRect roundRect;
- roundRect.setOval(SkRect::MakeWH(5, 5));
- canvas.clipRRect(roundRect, kIntersect_SkClipOp, true);
- SkCanvasState* state = SkCanvasStateUtils::CaptureCanvasState(&canvas);
- REPORTER_ASSERT(reporter, !state);
- }
- DEF_TEST(CanvasState_test_saveLayer_clip, reporter) {
- #ifdef SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG
- static_assert(SkCanvas::kDontClipToLayer_Legacy_SaveLayerFlag ==
- SkCanvasPriv::kDontClipToLayer_SaveLayerFlag, "");
- #endif
- const int WIDTH = 100;
- const int HEIGHT = 100;
- const int LAYER_WIDTH = 50;
- const int LAYER_HEIGHT = 50;
- SkBitmap bitmap;
- bitmap.allocN32Pixels(WIDTH, HEIGHT);
- SkCanvas canvas(bitmap);
- SkRect bounds = SkRect::MakeWH(SkIntToScalar(LAYER_WIDTH), SkIntToScalar(LAYER_HEIGHT));
- canvas.clipRect(SkRect::MakeWH(SkIntToScalar(WIDTH), SkIntToScalar(HEIGHT)));
- SkIRect devClip;
- // Check that saveLayer without the kClipToLayer_SaveFlag leaves the clip unchanged.
- canvas.saveLayer(SkCanvas::SaveLayerRec(&bounds, nullptr,
- (SkCanvas::SaveLayerFlags) SkCanvasPriv::kDontClipToLayer_SaveLayerFlag));
- devClip = canvas.getDeviceClipBounds();
- REPORTER_ASSERT(reporter, canvas.isClipRect());
- REPORTER_ASSERT(reporter, devClip.width() == WIDTH);
- REPORTER_ASSERT(reporter, devClip.height() == HEIGHT);
- canvas.restore();
- // Check that saveLayer with the kClipToLayer_SaveFlag sets the clip
- // stack to the layer bounds.
- canvas.saveLayer(&bounds, nullptr);
- devClip = canvas.getDeviceClipBounds();
- REPORTER_ASSERT(reporter, canvas.isClipRect());
- REPORTER_ASSERT(reporter, devClip.width() == LAYER_WIDTH);
- REPORTER_ASSERT(reporter, devClip.height() == LAYER_HEIGHT);
- canvas.restore();
- }
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