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epoger@google.comfd03db02011-07-28 14:24:55 +00001/*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
reed@google.com76f10a32014-02-05 15:32:21 +00007
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +00008#include "gm.h"
9#include "SkBitmap.h"
junov@google.com61d46a02011-07-28 13:34:31 +000010#include "SkCanvas.h"
junov@google.com61d46a02011-07-28 13:34:31 +000011#include "SkDevice.h"
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000012#include "SkString.h"
reed@google.com76f10a32014-02-05 15:32:21 +000013#include "SkSurface.h"
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000014
15namespace skiagm {
junov@google.com61d46a02011-07-28 13:34:31 +000016
17static void create_bitmap(SkBitmap* bitmap) {
18 const int W = 100;
19 const int H = 100;
reed@google.comeb9a46c2014-01-25 16:46:20 +000020 bitmap->allocN32Pixels(W, H);
junov@google.com61d46a02011-07-28 13:34:31 +000021
22 SkCanvas canvas(*bitmap);
23 canvas.drawColor(SK_ColorRED);
24 SkPaint paint;
25 paint.setColor(SK_ColorBLUE);
26 canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint);
27}
28
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000029class ExtractBitmapGM : public GM {
junov@google.com61d46a02011-07-28 13:34:31 +000030public:
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000031 ExtractBitmapGM() {}
rmistry@google.comae933ce2012-08-23 18:19:56 +000032
junov@google.com61d46a02011-07-28 13:34:31 +000033protected:
34 // overrides from SkEventSink
mtklein36352bf2015-03-25 18:17:31 -070035 SkString onShortName() override {
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000036 return SkString("extractbitmap");
junov@google.com61d46a02011-07-28 13:34:31 +000037 }
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000038
mtklein36352bf2015-03-25 18:17:31 -070039 SkISize onISize() override {
tfarinaf5393182014-06-09 23:59:03 -070040 return SkISize::Make(600, 600);
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000041 }
42
mtklein36352bf2015-03-25 18:17:31 -070043 void onDraw(SkCanvas* canvas) override {
junov@google.com61d46a02011-07-28 13:34:31 +000044 SkBitmap bitmap;
45 create_bitmap(&bitmap);
46 int x = bitmap.width() / 2;
47 int y = bitmap.height() / 2;
junov@google.com61d46a02011-07-28 13:34:31 +000048
49 canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
50
51 canvas->drawBitmap(bitmap, 0, 0);
scroggo@google.com6ea165d2012-07-03 14:52:08 +000052
53 {
54 // Do some subset drawing. This will test that an SkGPipe properly
55 // handles the case where bitmaps share a pixelref
56 // Draw the bottom right fourth of the bitmap over the top left
57 SkBitmap subset;
58 bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
59 canvas->drawBitmap(subset, 0, 0);
60 // Draw the top left corner over the bottom right
61 bitmap.extractSubset(&subset, SkIRect::MakeWH(x, y));
62 canvas->drawBitmap(subset, SkIntToScalar(x), SkIntToScalar(y));
63 // Draw a subset which has the same height and pixelref offset but a
64 // different width
65 bitmap.extractSubset(&subset, SkIRect::MakeWH(x, bitmap.height()));
66 SkAutoCanvasRestore autoRestore(canvas, true);
67 canvas->translate(0, SkIntToScalar(bitmap.height() + 20));
68 canvas->drawBitmap(subset, 0, 0);
69 // Now draw a subet which has the same width and pixelref offset but
70 // a different height
71 bitmap.extractSubset(&subset, SkIRect::MakeWH(bitmap.height(), y));
72 canvas->translate(0, SkIntToScalar(bitmap.height() + 20));
73 canvas->drawBitmap(subset, 0, 0);
74 }
junov@google.com61d46a02011-07-28 13:34:31 +000075 }
rmistry@google.comae933ce2012-08-23 18:19:56 +000076
junov@google.com61d46a02011-07-28 13:34:31 +000077private:
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000078 typedef GM INHERITED;
junov@google.com61d46a02011-07-28 13:34:31 +000079};
80
81//////////////////////////////////////////////////////////////////////////////
82
scroggo@google.com4f1f6bf2012-07-02 13:35:09 +000083static GM* MyFactory(void*) { return new ExtractBitmapGM; }
84static GMRegistry reg(MyFactory);
85
86}