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Diffstat (limited to 'gm/colorwheel.cpp')
-rw-r--r-- | gm/colorwheel.cpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/gm/colorwheel.cpp b/gm/colorwheel.cpp new file mode 100644 index 0000000000..93c59388d9 --- /dev/null +++ b/gm/colorwheel.cpp @@ -0,0 +1,57 @@ +/* + * 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 "Resources.h" +#include "SkData.h" +#include "SkDecodingImageGenerator.h" +#include "gm.h" + +static void checkerboard( + SkCanvas* canvas, int w, int h, int size, SkColor c1, SkColor c2) { + SkAutoCanvasRestore autoCanvasRestore(canvas, true); + canvas->clipRect(SkRect::MakeWH(SkIntToScalar(w), SkIntToScalar(h))); + canvas->drawColor(c1); + SkPaint paint; + paint.setColor(c2); + SkScalar s = SkIntToScalar(size); + for (int y = 0; y < h; y += size) { + SkScalar ty = SkIntToScalar(y); + bool oddRow = (y % (2 * size)) != 0; + for (int x = oddRow ? size : 0; x < w; x += (2 * size)) { + SkScalar tx = SkIntToScalar(x); + canvas->drawRect(SkRect::MakeXYWH(tx, ty, s, s), paint); + } + } +} + +static void draw_bitmap(SkCanvas* canvas, const char* resource, int x, int y) { + SkBitmap bitmap; + if (GetResourceAsBitmap(resource, &bitmap)) { + canvas->drawBitmap(bitmap, SkIntToScalar(x), SkIntToScalar(y)); + } else { + SkDebugf("\nCould not decode file '%s'. Did you forget" + " to set the resourcePath?\n", resource); + } +} + +/* + This GM tests whether the image decoders properly decode each color + channel. Four copies of the same image should appear in the GM, and + the letter R should be red, B should be blue, G green, C cyan, M + magenta, Y yellow, and K black. In all but the JPEG version of the + image, the letters should be on a white disc on a transparent + background (rendered as a checkerboard). The JPEG image has a grey + background and compression artifacts. + */ +DEF_SIMPLE_GM(colorwheel, canvas, 256, 256) { + canvas->clear(SK_ColorWHITE); + checkerboard(canvas, 256, 556, 8, 0xFF999999, 0xFF666666); + draw_bitmap(canvas, "color_wheel.png", 0, 0); // top left + draw_bitmap(canvas, "color_wheel.gif", 128, 0); // top right + draw_bitmap(canvas, "color_wheel.webp", 0, 128); // bottom left + draw_bitmap(canvas, "color_wheel.jpg", 128, 128); // bottom right +} |