| /* |
| * Copyright 2014 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/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkColorFilter.h" |
| #include "include/core/SkImageFilter.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPicture.h" |
| #include "include/core/SkPictureRecorder.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkImageFilters.h" |
| #include "include/effects/SkTableColorFilter.h" |
| #include "include/gpu/GrDirectContext.h" |
| |
| constexpr int kTestRectSize = 50; |
| constexpr int kDetectorGreenValue = 50; |
| |
| // Below are few functions to install "detector" color filters. The filter is there to assert that |
| // the color value it sees is the expected. It will trigger only with kDetectorGreenValue, and |
| // turn that value into full green. The idea is that if an optimization incorrectly changes |
| // kDetectorGreenValue and then the incorrect value is observable by some part of the drawing |
| // pipeline, that pixel will remain empty. |
| |
| static sk_sp<SkColorFilter> make_detector_color_filter() { |
| uint8_t tableA[256] = { 0, }; |
| uint8_t tableR[256] = { 0, }; |
| uint8_t tableG[256] = { 0, }; |
| uint8_t tableB[256] = { 0, }; |
| tableA[255] = 255; |
| tableG[kDetectorGreenValue] = 255; |
| return SkTableColorFilter::MakeARGB(tableA, tableR, tableG, tableB); |
| } |
| |
| // This detector detects that color filter phase of the pixel pipeline receives the correct value. |
| static void install_detector_color_filter(SkPaint* drawPaint) { |
| drawPaint->setColorFilter(make_detector_color_filter()); |
| } |
| |
| // This detector detects that image filter phase of the pixel pipeline receives the correct value. |
| static void install_detector_image_filter(SkPaint* drawPaint) { |
| drawPaint->setImageFilter(SkImageFilters::ColorFilter( |
| make_detector_color_filter(), drawPaint->refImageFilter())); |
| } |
| |
| static void no_detector_install(SkPaint*) { |
| } |
| |
| typedef void(*InstallDetectorFunc)(SkPaint*); |
| |
| |
| // Draws an pattern that can be optimized by alpha folding outer savelayer alpha value to |
| // inner draw. Since we know that folding will happen to the inner draw, install a detector |
| // to make sure that optimization does not change anything observable. |
| static void draw_save_layer_draw_rect_restore_sequence(SkCanvas* canvas, SkColor shapeColor, |
| InstallDetectorFunc installDetector) { |
| SkRect targetRect(SkRect::MakeWH(SkIntToScalar(kTestRectSize), SkIntToScalar(kTestRectSize))); |
| SkPaint layerPaint; |
| layerPaint.setColor(SkColorSetARGB(128, 0, 0, 0)); |
| canvas->saveLayer(&targetRect, &layerPaint); |
| SkPaint drawPaint; |
| drawPaint.setColor(shapeColor); |
| installDetector(&drawPaint); |
| canvas->drawRect(targetRect, drawPaint); |
| canvas->restore(); |
| } |
| |
| // Draws an pattern that can be optimized by alpha folding outer savelayer alpha value to |
| // inner draw. A variant where the draw is not uniform color. |
| static void draw_save_layer_draw_bitmap_restore_sequence(SkCanvas* canvas, SkColor shapeColor, |
| InstallDetectorFunc installDetector) { |
| SkBitmap bitmap; |
| bitmap.allocN32Pixels(kTestRectSize, kTestRectSize); |
| bitmap.eraseColor(shapeColor); |
| { |
| // Make the bitmap non-uniform color, so that it can not be optimized as uniform drawRect. |
| SkCanvas bitmapCanvas(bitmap); |
| SkPaint p; |
| p.setColor(SK_ColorWHITE); |
| SkASSERT(shapeColor != SK_ColorWHITE); |
| bitmapCanvas.drawRect(SkRect::MakeWH(SkIntToScalar(7), SkIntToScalar(7)), p); |
| } |
| |
| SkRect targetRect(SkRect::MakeWH(SkIntToScalar(kTestRectSize), SkIntToScalar(kTestRectSize))); |
| SkPaint layerPaint; |
| layerPaint.setColor(SkColorSetARGB(129, 0, 0, 0)); |
| canvas->saveLayer(&targetRect, &layerPaint); |
| SkPaint drawPaint; |
| installDetector(&drawPaint); |
| canvas->drawImage(bitmap.asImage(), 0, 0, SkSamplingOptions(), &drawPaint); |
| canvas->restore(); |
| } |
| |
| // Draws an pattern that can be optimized by alpha folding outer savelayer alpha value to |
| // inner savelayer. We know that alpha folding happens to inner savelayer, so add detector there. |
| static void draw_svg_opacity_and_filter_layer_sequence(SkCanvas* canvas, SkColor shapeColor, |
| InstallDetectorFunc installDetector) { |
| |
| SkRect targetRect(SkRect::MakeWH(SkIntToScalar(kTestRectSize), SkIntToScalar(kTestRectSize))); |
| sk_sp<SkPicture> shape; |
| { |
| SkPictureRecorder recorder; |
| SkCanvas* recordCanvas = recorder.beginRecording(SkIntToScalar(kTestRectSize + 2), |
| SkIntToScalar(kTestRectSize + 2)); |
| SkPaint shapePaint; |
| shapePaint.setColor(shapeColor); |
| recordCanvas->drawRect(targetRect, shapePaint); |
| shape = recorder.finishRecordingAsPicture(); |
| } |
| |
| SkPaint layerPaint; |
| layerPaint.setColor(SkColorSetARGB(130, 0, 0, 0)); |
| canvas->saveLayer(&targetRect, &layerPaint); |
| canvas->save(); |
| canvas->clipRect(targetRect); |
| SkPaint drawPaint; |
| drawPaint.setImageFilter(SkImageFilters::Picture(shape)); |
| installDetector(&drawPaint); |
| canvas->saveLayer(&targetRect, &drawPaint); |
| canvas->restore(); |
| canvas->restore(); |
| canvas->restore(); |
| } |
| |
| // Draws two columns of rectangles. The test is correct when: |
| // - Left and right columns always identical |
| // - First 3 rows are green, with a white dent in the middle row |
| // - Next 6 rows are green, with a grey dent in the middle row |
| // (the grey dent is from the color filter removing everything but the "good" green, see below) |
| // - Last 6 rows are grey |
| DEF_SIMPLE_GM(recordopts, canvas, (kTestRectSize+1)*2, (kTestRectSize+1)*15) { |
| auto direct = GrAsDirectContext(canvas->recordingContext()); |
| canvas->clear(SK_ColorTRANSPARENT); |
| |
| typedef void (*TestVariantSequence)(SkCanvas*, SkColor, InstallDetectorFunc); |
| TestVariantSequence funcs[] = { |
| draw_save_layer_draw_rect_restore_sequence, |
| draw_save_layer_draw_bitmap_restore_sequence, |
| draw_svg_opacity_and_filter_layer_sequence, |
| }; |
| |
| // Draw layer-related sequences that can be optimized by folding the opacity layer alpha to |
| // the inner draw operation. This tries to trigger the optimization, and relies on gm diffs |
| // to keep the color value correct over time. |
| |
| // Draws two green rects side by side: one is without the optimization, the other is with |
| // the optimization applied. |
| |
| SkColor shapeColor = SkColorSetARGB(255, 0, 255, 0); |
| for (size_t k = 0; k < std::size(funcs); ++k) { |
| canvas->save(); |
| |
| TestVariantSequence drawTestSequence = funcs[k]; |
| drawTestSequence(canvas, shapeColor, no_detector_install); |
| if (direct) { |
| direct->flushAndSubmit(); |
| } |
| canvas->translate(SkIntToScalar(kTestRectSize) + SkIntToScalar(1), SkIntToScalar(0)); |
| { |
| SkPictureRecorder recorder; |
| drawTestSequence(recorder.beginRecording(SkIntToScalar(kTestRectSize), |
| SkIntToScalar(kTestRectSize)), |
| shapeColor, no_detector_install); |
| recorder.finishRecordingAsPicture()->playback(canvas); |
| if (direct) { |
| direct->flushAndSubmit(); |
| } |
| } |
| canvas->restore(); |
| canvas->translate(SkIntToScalar(0), SkIntToScalar(kTestRectSize) + SkIntToScalar(1)); |
| } |
| |
| // Draw the same layer related sequences, but manipulate the sequences so that the result is |
| // incorrect if the alpha is folded or folded incorrectly. These test the observable state |
| // throughout the pixel pipeline, and thus may turn off the optimizations (this is why we |
| // trigger the optimizations above). |
| |
| // Draws two green rects side by side: one is without the optimization, the other is with |
| // the possibility that optimization is applied. |
| // At the end, draws the same patterns in translucent black. This tests that the detectors |
| // work, eg. that if the value the detector sees is wrong, the resulting image shows this. |
| SkColor shapeColors[] = { |
| SkColorSetARGB(255, 0, kDetectorGreenValue, 0), |
| SkColorSetARGB(255, 0, (kDetectorGreenValue + 1), 0) // This tests that detectors work. |
| }; |
| |
| InstallDetectorFunc detectorInstallFuncs[] = { |
| install_detector_image_filter, |
| install_detector_color_filter |
| }; |
| |
| for (size_t i = 0; i < std::size(shapeColors); ++i) { |
| shapeColor = shapeColors[i]; |
| for (size_t j = 0; j < std::size(detectorInstallFuncs); ++j) { |
| InstallDetectorFunc detectorInstallFunc = detectorInstallFuncs[j]; |
| for (size_t k = 0; k < std::size(funcs); ++k) { |
| TestVariantSequence drawTestSequence = funcs[k]; |
| canvas->save(); |
| drawTestSequence(canvas, shapeColor, detectorInstallFunc); |
| if (direct) { |
| direct->flushAndSubmit(); |
| } |
| canvas->translate(SkIntToScalar(kTestRectSize + 1), SkIntToScalar(0)); |
| { |
| SkPictureRecorder recorder; |
| drawTestSequence(recorder.beginRecording(SkIntToScalar(kTestRectSize), |
| SkIntToScalar(kTestRectSize)), |
| shapeColor, detectorInstallFunc); |
| recorder.finishRecordingAsPicture()->playback(canvas); |
| if (direct) { |
| direct->flushAndSubmit(); |
| } |
| } |
| |
| canvas->restore(); |
| canvas->translate(SkIntToScalar(0), SkIntToScalar(kTestRectSize + 1)); |
| } |
| |
| } |
| } |
| } |