eb9a46cbbb
This is an intermediate api, but might help us quickly get to a point where no one is creating bitmaps in a 2-step process (setConfig + alloc). BUG=skia: R=halcanary@google.com Review URL: https://codereview.chromium.org/140593005 git-svn-id: http://skia.googlecode.com/svn/trunk@13182 2bbb7eff-a529-9590-31e7-b0007b416f81
117 lines
4.3 KiB
C++
117 lines
4.3 KiB
C++
/*
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* Copyright 2012 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 "SkColor.h"
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#include "SkMatrixConvolutionImageFilter.h"
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#include "SkGradientShader.h"
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namespace skiagm {
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class MatrixConvolutionGM : public GM {
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public:
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MatrixConvolutionGM() : fInitialized(false) {
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this->setBGColor(0x00000000);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("matrixconvolution");
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}
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void make_bitmap() {
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fBitmap.allocN32Pixels(80, 80);
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SkBitmapDevice device(fBitmap);
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SkCanvas canvas(&device);
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canvas.clear(0x00000000);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(0xFFFFFFFF);
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paint.setTextSize(SkIntToScalar(180));
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SkPoint pts[2] = { SkPoint::Make(0, 0),
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SkPoint::Make(0, SkIntToScalar(80)) };
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SkColor colors[2] = { 0xFFFFFFFF, 0x40404040 };
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SkScalar pos[2] = { 0, SkIntToScalar(80) };
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paint.setShader(SkGradientShader::CreateLinear(
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pts, colors, pos, 2, SkShader::kClamp_TileMode))->unref();
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const char* str = "e";
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canvas.drawText(str, strlen(str), SkIntToScalar(-10), SkIntToScalar(80), paint);
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}
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virtual SkISize onISize() {
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return make_isize(500, 300);
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}
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void draw(SkCanvas* canvas, int x, int y, const SkIPoint& target,
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SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha,
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const SkImageFilter::CropRect* cropRect = NULL) {
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SkScalar kernel[9] = {
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SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
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SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
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SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
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};
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SkISize kernelSize = SkISize::Make(3, 3);
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SkScalar gain = 0.3f, bias = SkIntToScalar(100);
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SkPaint paint;
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SkAutoTUnref<SkImageFilter> filter(
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SkNEW_ARGS(SkMatrixConvolutionImageFilter, (kernelSize,
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kernel,
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gain,
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bias,
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target,
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tileMode,
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convolveAlpha,
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NULL,
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cropRect)));
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paint.setImageFilter(filter);
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas->clipRect(SkRect::MakeWH(SkIntToScalar(fBitmap.width()),
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SkIntToScalar(fBitmap.height())));
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canvas->drawBitmap(fBitmap, 0, 0, &paint);
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canvas->restore();
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}
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typedef SkMatrixConvolutionImageFilter MCIF;
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virtual void onDraw(SkCanvas* canvas) {
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if (!fInitialized) {
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make_bitmap();
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fInitialized = true;
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}
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canvas->clear(0x00000000);
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SkIPoint target = SkIPoint::Make(1, 0);
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for (int x = 10; x < 310; x += 100) {
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this->draw(canvas, x, 10, target, MCIF::kClamp_TileMode, true);
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this->draw(canvas, x, 110, target, MCIF::kClampToBlack_TileMode, true);
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this->draw(canvas, x, 210, target, MCIF::kRepeat_TileMode, true);
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target.fY++;
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}
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target.fY = 1;
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SkImageFilter::CropRect rect(SkRect::MakeXYWH(10, 5, 60, 60));
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this->draw(canvas, 310, 10, target, MCIF::kClamp_TileMode, true, &rect);
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this->draw(canvas, 310, 110, target, MCIF::kClampToBlack_TileMode, true, &rect);
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this->draw(canvas, 310, 210, target, MCIF::kRepeat_TileMode, true, &rect);
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this->draw(canvas, 410, 10, target, MCIF::kClamp_TileMode, false);
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this->draw(canvas, 410, 110, target, MCIF::kClampToBlack_TileMode, false);
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this->draw(canvas, 410, 210, target, MCIF::kRepeat_TileMode, false);
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}
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private:
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typedef GM INHERITED;
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SkBitmap fBitmap;
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bool fInitialized;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new MatrixConvolutionGM; }
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static GMRegistry reg(MyFactory);
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}
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