59fd223870
This is a resubmit of https://codereview.chromium.org/22831039 which was reverted because it causes issues on Windows. BUG=chromium:175548 R=edisonn@google.com Review URL: https://codereview.chromium.org/29193003 git-svn-id: http://skia.googlecode.com/svn/trunk@11866 2bbb7eff-a529-9590-31e7-b0007b416f81
132 lines
3.8 KiB
C++
132 lines
3.8 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkBitmap.h"
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#include "SkCanvas.h"
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#include "SkColorPriv.h"
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/**
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* This GM checks that bitmap pixels are unpremultiplied before being exported
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* to other formats. If unpremultiplication is implemented properly, this
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* GM should come out completely white. If not, this GM looks like a row of two
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* greyscale gradients above a row of grey lines.
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* This tests both the ARGB4444 and ARGB8888 bitmap configurations.
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*/
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static const int SLIDE_SIZE = 256;
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static const int PIXEL_SIZE_8888 = SLIDE_SIZE / 256;
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static const int PIXEL_SIZE_4444 = SLIDE_SIZE / 16;
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static SkBitmap init_bitmap(SkBitmap::Config config) {
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SkBitmap bitmap;
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bitmap.setConfig(config, SLIDE_SIZE, SLIDE_SIZE);
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bitmap.allocPixels();
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bitmap.eraseColor(SK_ColorWHITE);
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return bitmap;
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}
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static SkBitmap make_argb8888_gradient() {
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SkBitmap bitmap = init_bitmap(SkBitmap::kARGB_8888_Config);
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uint8_t rowColor = 0;
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for (int y = 0; y < SLIDE_SIZE; y++) {
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uint32_t* dst = bitmap.getAddr32(0, y);
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for (int x = 0; x < SLIDE_SIZE; x++) {
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dst[x] = SkPackARGB32(rowColor, rowColor,
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rowColor, rowColor);
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}
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if (y % PIXEL_SIZE_8888 == PIXEL_SIZE_8888 - 1) {
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rowColor++;
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}
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}
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return bitmap;
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}
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static SkBitmap make_argb4444_gradient() {
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SkBitmap bitmap = init_bitmap(SkBitmap::kARGB_4444_Config);
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uint8_t rowColor = 0;
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for (int y = 0; y < SLIDE_SIZE; y++) {
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uint16_t* dst = bitmap.getAddr16(0, y);
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for (int x = 0; x < SLIDE_SIZE; x++) {
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dst[x] = SkPackARGB4444(rowColor, rowColor,
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rowColor, rowColor);
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}
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if (y % PIXEL_SIZE_4444 == PIXEL_SIZE_4444 - 1) {
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rowColor++;
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}
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}
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return bitmap;
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}
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static SkBitmap make_argb8888_stripes() {
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SkBitmap bitmap = init_bitmap(SkBitmap::kARGB_8888_Config);
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uint8_t rowColor = 0;
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for (int y = 0; y < SLIDE_SIZE; y++) {
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uint32_t* dst = bitmap.getAddr32(0, y);
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for (int x = 0; x < SLIDE_SIZE; x++) {
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dst[x] = SkPackARGB32(rowColor, rowColor,
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rowColor, rowColor);
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}
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if (rowColor == 0) {
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rowColor = 255;
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} else {
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rowColor = 0;
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}
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}
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return bitmap;
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}
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static SkBitmap make_argb4444_stripes() {
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SkBitmap bitmap = init_bitmap(SkBitmap::kARGB_4444_Config);
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uint8_t rowColor = 0;;
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for (int y = 0; y < SLIDE_SIZE; y++) {
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uint16_t* dst = bitmap.getAddr16(0, y);
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for (int x = 0; x < SLIDE_SIZE; x++) {
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dst[x] = SkPackARGB4444(rowColor, rowColor,
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rowColor, rowColor);
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}
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if (rowColor == 0) {
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rowColor = 15;
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} else {
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rowColor = 0;
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}
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}
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return bitmap;
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}
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namespace skiagm {
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class BitmapPremulGM : public GM {
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public:
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BitmapPremulGM() {
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this->setBGColor(SK_ColorWHITE);
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}
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protected:
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SkString onShortName() SK_OVERRIDE {
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return SkString("bitmap_premul");
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}
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virtual SkISize onISize() SK_OVERRIDE {
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return SkISize::Make(SLIDE_SIZE * 2, SLIDE_SIZE * 2);
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}
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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SkScalar slideSize = SkIntToScalar(SLIDE_SIZE);
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canvas->drawBitmap(make_argb8888_gradient(), 0, 0);
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canvas->drawBitmap(make_argb4444_gradient(), slideSize, 0);
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canvas->drawBitmap(make_argb8888_stripes(), 0, slideSize);
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canvas->drawBitmap(make_argb4444_stripes(), slideSize, slideSize);
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}
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private:
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typedef GM INHERITED;
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};
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DEF_GM( return new BitmapPremulGM; )
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}
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