58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
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/*
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* Copyright 2014 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 "Resources.h"
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#include "SkData.h"
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#include "SkDecodingImageGenerator.h"
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#include "gm.h"
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static void checkerboard(
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SkCanvas* canvas, int w, int h, int size, SkColor c1, SkColor c2) {
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SkAutoCanvasRestore autoCanvasRestore(canvas, true);
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canvas->clipRect(SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h)));
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canvas->drawColor(c1);
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SkPaint paint;
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paint.setColor(c2);
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SkScalar s = SkIntToScalar(size);
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for (int y = 0; y < h; y += size) {
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SkScalar ty = SkIntToScalar(y);
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bool oddRow = (y % (2 * size)) != 0;
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for (int x = oddRow ? size : 0; x < w; x += (2 * size)) {
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SkScalar tx = SkIntToScalar(x);
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canvas->drawRect(SkRect::MakeXYWH(tx, ty, s, s), paint);
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}
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}
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}
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static void draw_bitmap(SkCanvas* canvas, const char* resource, int x, int y) {
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SkBitmap bitmap;
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if (GetResourceAsBitmap(resource, &bitmap)) {
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canvas->drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y));
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} else {
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SkDebugf("\nCould not decode file '%s'. Did you forget"
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" to set the resourcePath?\n", resource);
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}
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}
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/*
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This GM tests whether the image decoders properly decode each color
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channel. Four copies of the same image should appear in the GM, and
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the letter R should be red, B should be blue, G green, C cyan, M
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magenta, Y yellow, and K black. In all but the JPEG version of the
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image, the letters should be on a white disc on a transparent
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background (rendered as a checkerboard). The JPEG image has a grey
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background and compression artifacts.
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*/
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DEF_SIMPLE_GM(colorwheel, canvas, 256, 256) {
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canvas->clear(SK_ColorWHITE);
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checkerboard(canvas, 256, 556, 8, 0xFF999999, 0xFF666666);
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draw_bitmap(canvas, "color_wheel.png", 0, 0); // top left
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draw_bitmap(canvas, "color_wheel.gif", 128, 0); // top right
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draw_bitmap(canvas, "color_wheel.webp", 0, 128); // bottom left
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draw_bitmap(canvas, "color_wheel.jpg", 128, 128); // bottom right
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}
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