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- /*
- * 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 "bench/Benchmark.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkImageFilter.h"
- #include "include/effects/SkColorFilterImageFilter.h"
- #include "include/effects/SkColorMatrixFilter.h"
- #include "include/effects/SkGradientShader.h"
- #include "include/effects/SkTableColorFilter.h"
- // Chains several matrix color filters image filter or several
- // table filter image filters and draws a bitmap.
- // This bench shows an improvement in performance and memory
- // when collapsing matrices or tables is implemented since all
- // the passes are collapsed in one.
- class BaseImageFilterCollapseBench : public Benchmark {
- public:
- BaseImageFilterCollapseBench() {}
- protected:
- void doPreDraw(sk_sp<SkColorFilter> colorFilters[], int nFilters) {
- SkASSERT(!fImageFilter);
- // Create a chain of ImageFilters from colorFilters
- for(int i = nFilters; i --> 0;) {
- fImageFilter = SkColorFilterImageFilter::Make(colorFilters[i], fImageFilter);
- }
- }
- void onDraw(int loops, SkCanvas* canvas) override {
- makeBitmap();
- for(int i = 0; i < loops; i++) {
- SkPaint paint;
- paint.setImageFilter(fImageFilter);
- canvas->drawBitmap(fBitmap, 0, 0, &paint);
- }
- }
- private:
- sk_sp<SkImageFilter> fImageFilter;
- SkBitmap fBitmap;
- void makeBitmap() {
- int W = 400;
- int H = 400;
- fBitmap.allocN32Pixels(W, H);
- fBitmap.eraseColor(SK_ColorTRANSPARENT);
- SkCanvas canvas(fBitmap);
- SkPaint paint;
- SkPoint pts[] = { {0, 0}, {SkIntToScalar(W), SkIntToScalar(H)} };
- SkColor colors[] = {
- SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
- SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
- };
- paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
- SkTileMode::kClamp));
- canvas.drawPaint(paint);
- }
- };
- class TableCollapseBench: public BaseImageFilterCollapseBench {
- protected:
- const char* onGetName() override {
- return "image_filter_collapse_table";
- }
- void onDelayedSetup() override {
- for (int i = 0; i < 256; ++i) {
- int n = i >> 5;
- table1[i] = (n << 5) | (n << 2) | (n >> 1);
- table2[i] = i * i / 255;
- float fi = i / 255.0f;
- table3[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
- }
- sk_sp<SkColorFilter> colorFilters[] = {
- SkTableColorFilter::Make(table1),
- SkTableColorFilter::Make(table2),
- SkTableColorFilter::Make(table3),
- };
- this->doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
- }
- private:
- uint8_t table1[256], table2[256], table3[256];
- };
- static sk_sp<SkColorFilter> make_brightness(float amount) {
- SkScalar matrix[20] = { 1, 0, 0, 0, amount,
- 0, 1, 0, 0, amount,
- 0, 0, 1, 0, amount,
- 0, 0, 0, 1, 0 };
- return SkColorFilters::Matrix(matrix);
- }
- static sk_sp<SkColorFilter> make_grayscale() {
- float matrix[20];
- memset(matrix, 0, 20 * sizeof(float));
- matrix[0] = matrix[5] = matrix[10] = 0.2126f;
- matrix[1] = matrix[6] = matrix[11] = 0.7152f;
- matrix[2] = matrix[7] = matrix[12] = 0.0722f;
- matrix[18] = 1.0f;
- return SkColorFilters::Matrix(matrix);
- }
- class MatrixCollapseBench: public BaseImageFilterCollapseBench {
- protected:
- const char* onGetName() override {
- return "image_filter_collapse_matrix";
- }
- void onDelayedSetup() override {
- sk_sp<SkColorFilter> colorFilters[] = {
- make_brightness(0.1f),
- make_grayscale(),
- make_brightness(-0.1f),
- };
- this->doPreDraw(colorFilters, SK_ARRAY_COUNT(colorFilters));
- }
- };
- DEF_BENCH(return new TableCollapseBench;)
- DEF_BENCH(return new MatrixCollapseBench;)
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