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-rw-r--r--chromium/third_party/skia/gm/optimizations.cpp417
1 files changed, 417 insertions, 0 deletions
diff --git a/chromium/third_party/skia/gm/optimizations.cpp b/chromium/third_party/skia/gm/optimizations.cpp
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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 "gm.h"
+#include "SkDebugCanvas.h"
+#include "SkPictureFlat.h"
+#include "SkPictureRecorder.h"
+
+#define WARN(msg) \
+ SkDebugf("%s:%d: %s\n", __FILE__, __LINE__, msg);
+
+// Do the commands in 'input' match the supplied pattern? Note: this is a pretty
+// heavy-weight operation since we are drawing the picture into a debug canvas
+// to extract the commands.
+static bool check_pattern(SkPicture& input, const SkTDArray<DrawType> &pattern) {
+ SkDebugCanvas debugCanvas(input.width(), input.height());
+ debugCanvas.setBounds(input.width(), input.height());
+ input.draw(&debugCanvas);
+
+ if (pattern.count() != debugCanvas.getSize()) {
+ return false;
+ }
+
+ for (int i = 0; i < pattern.count(); ++i) {
+ if (pattern[i] != debugCanvas.getDrawCommandAt(i)->getType()) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+// construct the pattern removed by the SkPictureRecord::remove_save_layer1
+// optimization, i.e.:
+// SAVE_LAYER
+// DRAW_BITMAP|DRAW_BITMAP_MATRIX|DRAW_BITMAP_NINE|DRAW_BITMAP_RECT_TO_RECT
+// RESTORE
+//
+// saveLayerHasPaint - control if the saveLayer has a paint (the optimization
+// takes a different path if this is false)
+// dbmr2rHasPaint - control if the dbmr2r has a paint (the optimization
+// takes a different path if this is false)
+// colorsMatch - control if the saveLayer and dbmr2r paint colors
+// match (the optimization will fail if they do not)
+static SkPicture* create_save_layer_opt_1(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard,
+ bool saveLayerHasPaint,
+ bool dbmr2rHasPaint,
+ bool colorsMatch) {
+ // Create the pattern that should trigger the optimization
+ preOptPattern->setCount(5);
+ (*preOptPattern)[0] = SAVE;
+ (*preOptPattern)[1] = SAVE_LAYER;
+ (*preOptPattern)[2] = DRAW_BITMAP_RECT_TO_RECT;
+ (*preOptPattern)[3] = RESTORE;
+ (*preOptPattern)[4] = RESTORE;
+
+ if (colorsMatch) {
+ // Create the pattern that should appear after the optimization
+ postOptPattern->setCount(5);
+ (*postOptPattern)[0] = SAVE; // extra save/restore added by extra draw
+ (*postOptPattern)[1] = SAVE;
+ (*postOptPattern)[2] = DRAW_BITMAP_RECT_TO_RECT;
+ (*postOptPattern)[3] = RESTORE;
+ (*postOptPattern)[4] = RESTORE;
+ } else {
+ // Create the pattern that appears if the optimization doesn't fire
+ postOptPattern->setCount(7);
+ (*postOptPattern)[0] = SAVE; // extra save/restore added by extra draw
+ (*postOptPattern)[1] = SAVE;
+ (*postOptPattern)[2] = SAVE_LAYER;
+ (*postOptPattern)[3] = DRAW_BITMAP_RECT_TO_RECT;
+ (*postOptPattern)[4] = RESTORE;
+ (*postOptPattern)[5] = RESTORE;
+ (*postOptPattern)[6] = RESTORE;
+ }
+
+ SkPictureRecorder recorder;
+
+ SkCanvas* canvas = recorder.beginRecording(100, 100, NULL, 0);
+ // have to disable the optimizations while generating the picture
+ recorder.internalOnly_EnableOpts(false);
+
+ SkPaint saveLayerPaint;
+ saveLayerPaint.setColor(0xCC000000);
+
+ // saveLayer's 'bounds' parameter must be NULL for this optimization
+ if (saveLayerHasPaint) {
+ canvas->saveLayer(NULL, &saveLayerPaint);
+ } else {
+ canvas->saveLayer(NULL, NULL);
+ }
+
+ SkRect rect = { 10, 10, 90, 90 };
+
+ // The dbmr2r's paint must be opaque
+ SkPaint dbmr2rPaint;
+ if (colorsMatch) {
+ dbmr2rPaint.setColor(0xFF000000);
+ } else {
+ dbmr2rPaint.setColor(0xFFFF0000);
+ }
+
+ if (dbmr2rHasPaint) {
+ canvas->drawBitmapRectToRect(checkerBoard, NULL, rect, &dbmr2rPaint);
+ } else {
+ canvas->drawBitmapRectToRect(checkerBoard, NULL, rect, NULL);
+ }
+ canvas->restore();
+
+ return recorder.endRecording();
+}
+
+// straight-ahead version that is seen in the skps
+static SkPicture* create_save_layer_opt_1_v1(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard) {
+ return create_save_layer_opt_1(preOptPattern, postOptPattern, checkerBoard,
+ true, // saveLayer has a paint
+ true, // dbmr2r has a paint
+ true); // and the colors match
+}
+
+// alternate version that should still succeed
+static SkPicture* create_save_layer_opt_1_v2(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard) {
+ return create_save_layer_opt_1(preOptPattern, postOptPattern, checkerBoard,
+ false, // saveLayer doesn't have a paint!
+ true, // dbmr2r has a paint
+ true); // color matching not really applicable
+}
+
+// alternate version that should still succeed
+static SkPicture* create_save_layer_opt_1_v3(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard) {
+ return create_save_layer_opt_1(preOptPattern, postOptPattern, checkerBoard,
+ true, // saveLayer has a paint
+ false, // dbmr2r doesn't have a paint!
+ true); // color matching not really applicable
+}
+
+// version in which the optimization fails b.c. the colors don't match
+static SkPicture* create_save_layer_opt_1_v4(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard) {
+ return create_save_layer_opt_1(preOptPattern, postOptPattern, checkerBoard,
+ true, // saveLayer has a paint
+ true, // dbmr2r has a paint
+ false); // and the colors don't match!
+}
+
+// construct the pattern removed by the SkPictureRecord::remove_save_layer2
+// optimization, i.e.:
+// SAVE_LAYER (with NULL == bounds)
+// SAVE
+// CLIP_RECT
+// DRAW_BITMAP|DRAW_BITMAP_MATRIX|DRAW_BITMAP_NINE|DRAW_BITMAP_RECT_TO_RECT
+// RESTORE
+// RESTORE
+//
+// saveLayerHasPaint - control if the saveLayer has a paint (the optimization
+// takes a different path if this is false)
+// dbmr2rHasPaint - control if the dbmr2r has a paint (the optimization
+// takes a different path if this is false)
+// colorsMatch - control if the saveLayer and dbmr2r paint colors
+// match (the optimization will fail if they do not)
+static SkPicture* create_save_layer_opt_2(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard,
+ bool saveLayerHasPaint,
+ bool dbmr2rHasPaint,
+ bool colorsMatch) {
+ // Create the pattern that should trigger the optimization
+ preOptPattern->setCount(8);
+ (*preOptPattern)[0] = SAVE;
+ (*preOptPattern)[1] = SAVE_LAYER;
+ (*preOptPattern)[2] = SAVE;
+ (*preOptPattern)[3] = CLIP_RECT;
+ (*preOptPattern)[4] = DRAW_BITMAP_RECT_TO_RECT;
+ (*preOptPattern)[5] = RESTORE;
+ (*preOptPattern)[6] = RESTORE;
+ (*preOptPattern)[7] = RESTORE;
+
+ if (colorsMatch) {
+ // Create the pattern that should appear after the optimization
+ postOptPattern->setCount(8);
+ (*postOptPattern)[0] = SAVE; // extra save/restore added by extra draw
+ (*postOptPattern)[1] = SAVE;
+ (*postOptPattern)[2] = SAVE;
+ (*postOptPattern)[3] = CLIP_RECT;
+ (*postOptPattern)[4] = DRAW_BITMAP_RECT_TO_RECT;
+ (*postOptPattern)[5] = RESTORE;
+ (*postOptPattern)[6] = RESTORE;
+ (*postOptPattern)[7] = RESTORE;
+ } else {
+ // Create the pattern that appears if the optimization doesn't fire
+ postOptPattern->setCount(10);
+ (*postOptPattern)[0] = SAVE; // extra save/restore added by extra draw
+ (*postOptPattern)[1] = SAVE;
+ (*postOptPattern)[2] = SAVE_LAYER;
+ (*postOptPattern)[3] = SAVE;
+ (*postOptPattern)[4] = CLIP_RECT;
+ (*postOptPattern)[5] = DRAW_BITMAP_RECT_TO_RECT;
+ (*postOptPattern)[6] = RESTORE;
+ (*postOptPattern)[7] = RESTORE;
+ (*postOptPattern)[8] = RESTORE;
+ (*postOptPattern)[9] = RESTORE;
+ }
+
+ SkPictureRecorder recorder;
+
+ SkCanvas* canvas = recorder.beginRecording(100, 100, NULL, 0);
+ // have to disable the optimizations while generating the picture
+ recorder.internalOnly_EnableOpts(false);
+
+ SkPaint saveLayerPaint;
+ saveLayerPaint.setColor(0xCC000000);
+
+ // saveLayer's 'bounds' parameter must be NULL for this optimization
+ if (saveLayerHasPaint) {
+ canvas->saveLayer(NULL, &saveLayerPaint);
+ } else {
+ canvas->saveLayer(NULL, NULL);
+ }
+
+ canvas->save();
+
+ SkRect rect = { 10, 10, 90, 90 };
+ canvas->clipRect(rect);
+
+ // The dbmr2r's paint must be opaque
+ SkPaint dbmr2rPaint;
+ if (colorsMatch) {
+ dbmr2rPaint.setColor(0xFF000000);
+ } else {
+ dbmr2rPaint.setColor(0xFFFF0000);
+ }
+
+ if (dbmr2rHasPaint) {
+ canvas->drawBitmapRectToRect(checkerBoard, NULL, rect, &dbmr2rPaint);
+ } else {
+ canvas->drawBitmapRectToRect(checkerBoard, NULL, rect, NULL);
+ }
+ canvas->restore();
+ canvas->restore();
+
+ return recorder.endRecording();
+}
+
+// straight-ahead version that is seen in the skps
+static SkPicture* create_save_layer_opt_2_v1(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard) {
+ return create_save_layer_opt_2(preOptPattern, postOptPattern, checkerBoard,
+ true, // saveLayer has a paint
+ true, // dbmr2r has a paint
+ true); // and the colors match
+}
+
+// alternate version that should still succeed
+static SkPicture* create_save_layer_opt_2_v2(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard) {
+ return create_save_layer_opt_2(preOptPattern, postOptPattern, checkerBoard,
+ false, // saveLayer doesn't have a paint!
+ true, // dbmr2r has a paint
+ true); // color matching not really applicable
+}
+
+// alternate version that should still succeed
+static SkPicture* create_save_layer_opt_2_v3(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard) {
+ return create_save_layer_opt_2(preOptPattern, postOptPattern, checkerBoard,
+ true, // saveLayer has a paint
+ false, // dbmr2r doesn't have a paint!
+ true); // color matching not really applicable
+}
+
+// version in which the optimization fails b.c. the colors don't match
+static SkPicture* create_save_layer_opt_2_v4(SkTDArray<DrawType>* preOptPattern,
+ SkTDArray<DrawType>* postOptPattern,
+ const SkBitmap& checkerBoard) {
+ return create_save_layer_opt_2(preOptPattern, postOptPattern, checkerBoard,
+ true, // saveLayer has a paint
+ true, // dbmr2r has a paint
+ false); // and the colors don't match!
+}
+
+// As our .skp optimizations get folded into the captured skps our code will
+// no longer be locally exercised. This GM manually constructs the patterns
+// our optimizations will remove to test them. It acts as both a GM and a unit
+// test
+class OptimizationsGM : public skiagm::GM {
+public:
+ OptimizationsGM() {
+ this->makeCheckerboard();
+ }
+
+ static const int kWidth = 800;
+ static const int kHeight = 800;
+
+protected:
+ uint32_t onGetFlags() const SK_OVERRIDE {
+ // One optimization changes the color drawn slightly in a 565 target.
+ // We've decided it's innocuous, so we disable this GM when targeting 565.
+ // Revisit this if we get finer-grained control: it'd be nice to keep drawing directly.
+ // For more, see skia:1994.
+ return skiagm::GM::kSkip565_Flag;
+ }
+
+ SkString onShortName() {
+ return SkString("optimizations");
+ }
+
+ SkISize onISize() { return SkISize::Make(kWidth, kHeight); }
+
+ typedef SkPicture* (*PFCreateOpt)(SkTDArray<DrawType> *preOptPattern,
+ SkTDArray<DrawType> *postOptPattern,
+ const SkBitmap& checkerBoard);
+
+ virtual void onDraw(SkCanvas* canvas) {
+
+ PFCreateOpt gOpts[] = {
+ create_save_layer_opt_1_v1,
+ create_save_layer_opt_1_v2,
+ create_save_layer_opt_1_v3,
+ create_save_layer_opt_1_v4,
+ create_save_layer_opt_2_v1,
+ create_save_layer_opt_2_v2,
+ create_save_layer_opt_2_v3,
+ create_save_layer_opt_2_v4,
+ };
+
+ SkTDArray<DrawType> prePattern, postPattern;
+ int xPos = 0, yPos = 0;
+
+ for (size_t i = 0; i < SK_ARRAY_COUNT(gOpts); ++i) {
+ SkAutoTUnref<SkPicture> pre((*gOpts[i])(&prePattern, &postPattern, fCheckerboard));
+
+ if (!(check_pattern(*pre, prePattern))) {
+ WARN("Pre optimization pattern mismatch");
+ SkASSERT(0);
+ }
+
+ canvas->save();
+ canvas->translate(SkIntToScalar(xPos), SkIntToScalar(yPos));
+ pre->draw(canvas);
+ xPos += pre->width();
+ canvas->restore();
+
+ // re-render the 'pre' picture and thus 'apply' the optimization
+ SkPictureRecorder recorder;
+
+ SkCanvas* recordCanvas = recorder.beginRecording(pre->width(), pre->height(), NULL, 0);
+
+ pre->draw(recordCanvas);
+
+ SkAutoTUnref<SkPicture> post(recorder.endRecording());
+
+ if (!(check_pattern(*post, postPattern))) {
+ WARN("Post optimization pattern mismatch");
+ SkASSERT(0);
+ }
+
+ canvas->save();
+ canvas->translate(SkIntToScalar(xPos), SkIntToScalar(yPos));
+ post->draw(canvas);
+ xPos += post->width();
+ canvas->restore();
+
+ if (xPos >= kWidth) {
+ // start a new line
+ xPos = 0;
+ yPos += post->height();
+ }
+
+ // TODO: we could also render the pre and post pictures to bitmaps
+ // and manually compare them in this method
+ }
+ }
+
+private:
+ void makeCheckerboard() {
+ static const unsigned int kCheckerboardWidth = 16;
+ static const unsigned int kCheckerboardHeight = 16;
+
+ fCheckerboard.allocN32Pixels(kCheckerboardWidth, kCheckerboardHeight);
+ for (unsigned int y = 0; y < kCheckerboardHeight; y += 2) {
+ SkPMColor* scanline = fCheckerboard.getAddr32(0, y);
+ for (unsigned int x = 0; x < kCheckerboardWidth; x += 2) {
+ *scanline++ = 0xFFFFFFFF;
+ *scanline++ = 0xFF000000;
+ }
+ scanline = fCheckerboard.getAddr32(0, y + 1);
+ for (unsigned int x = 0; x < kCheckerboardWidth; x += 2) {
+ *scanline++ = 0xFF000000;
+ *scanline++ = 0xFFFFFFFF;
+ }
+ }
+ }
+
+ SkBitmap fCheckerboard;
+
+ typedef skiagm::GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+DEF_GM( return new OptimizationsGM; )
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-08 01:26:39 +0000