From 781cc76e0f1ebb06e0796a9237045ae9d4bddd21 Mon Sep 17 00:00:00 2001 From: "sugoi@google.com" Date: Tue, 15 Jan 2013 15:40:19 +0000 Subject: Implementation of the displacement effect (both CPU and GPU) TEST=Added new GM called "displacement" Review URL: https://codereview.appspot.com/7058075 git-svn-id: http://skia.googlecode.com/svn/trunk@7182 2bbb7eff-a529-9590-31e7-b0007b416f81 --- gm/displacement.cpp | 137 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 gm/displacement.cpp (limited to 'gm/displacement.cpp') diff --git a/gm/displacement.cpp b/gm/displacement.cpp new file mode 100644 index 0000000000..342806dd04 --- /dev/null +++ b/gm/displacement.cpp @@ -0,0 +1,137 @@ +/* + * Copyright 2013 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "gm.h" +#include "SkDisplacementMapEffect.h" +#include "SkBitmapSource.h" + +namespace skiagm { + +class DisplacementMapGM : public GM { +public: + DisplacementMapGM() : fInitialized(false) { + this->setBGColor(0xFF000000); + } + +protected: + virtual SkString onShortName() { + return SkString("displacement"); + } + + void make_bitmap() { + fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 80, 80); + fBitmap.allocPixels(); + SkDevice device(fBitmap); + SkCanvas canvas(&device); + canvas.clear(0x00000000); + SkPaint paint; + paint.setAntiAlias(true); + paint.setColor(0xFF884422); + paint.setTextSize(SkIntToScalar(96)); + const char* str = "g"; + canvas.drawText(str, strlen(str), SkIntToScalar(15), SkIntToScalar(55), paint); + } + + void make_checkerboard() { + fCheckerboard.setConfig(SkBitmap::kARGB_8888_Config, 80, 80); + fCheckerboard.allocPixels(); + SkDevice device(fCheckerboard); + SkCanvas canvas(&device); + canvas.clear(0x00000000); + SkPaint darkPaint; + darkPaint.setColor(0xFF804020); + SkPaint lightPaint; + lightPaint.setColor(0xFF244484); + for (int y = 0; y < 80; y += 16) { + for (int x = 0; x < 80; x += 16) { + canvas.save(); + canvas.translate(SkIntToScalar(x), SkIntToScalar(y)); + canvas.drawRect(SkRect::MakeXYWH(0, 0, 8, 8), darkPaint); + canvas.drawRect(SkRect::MakeXYWH(8, 0, 8, 8), lightPaint); + canvas.drawRect(SkRect::MakeXYWH(0, 8, 8, 8), lightPaint); + canvas.drawRect(SkRect::MakeXYWH(8, 8, 8, 8), darkPaint); + canvas.restore(); + } + } + } + + virtual SkISize onISize() { + return make_isize(500, 200); + } + + void drawClippedBitmap(SkCanvas* canvas, int x, int y, const SkPaint& paint) { + canvas->save(); + canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y), + SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height()))); + canvas->drawBitmap(fBitmap, SkIntToScalar(x), SkIntToScalar(y), &paint); + canvas->restore(); + } + + virtual void onDraw(SkCanvas* canvas) { + if (!fInitialized) { + make_bitmap(); + make_checkerboard(); + fInitialized = true; + } + canvas->clear(0x00000000); + SkPaint paint; + SkAutoTUnref displ(SkNEW_ARGS(SkBitmapSource, (fCheckerboard))); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kR_ChannelSelectorType, + SkDisplacementMapEffect::kG_ChannelSelectorType, 0.0f, displ)))->unref(); + drawClippedBitmap(canvas, 0, 0, paint); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kB_ChannelSelectorType, + SkDisplacementMapEffect::kA_ChannelSelectorType, 0.2f, displ)))->unref(); + drawClippedBitmap(canvas, 100, 0, paint); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kR_ChannelSelectorType, + SkDisplacementMapEffect::kB_ChannelSelectorType, 0.4f, displ)))->unref(); + drawClippedBitmap(canvas, 200, 0, paint); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kG_ChannelSelectorType, + SkDisplacementMapEffect::kA_ChannelSelectorType, 0.6f, displ)))->unref(); + drawClippedBitmap(canvas, 300, 0, paint); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kR_ChannelSelectorType, + SkDisplacementMapEffect::kA_ChannelSelectorType, 0.8f, displ)))->unref(); + drawClippedBitmap(canvas, 400, 0, paint); + + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kR_ChannelSelectorType, + SkDisplacementMapEffect::kG_ChannelSelectorType, 0.5f, displ)))->unref(); + drawClippedBitmap(canvas, 0, 100, paint); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kB_ChannelSelectorType, + SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref(); + drawClippedBitmap(canvas, 100, 100, paint); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kR_ChannelSelectorType, + SkDisplacementMapEffect::kB_ChannelSelectorType, 0.5f, displ)))->unref(); + drawClippedBitmap(canvas, 200, 100, paint); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kG_ChannelSelectorType, + SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref(); + drawClippedBitmap(canvas, 300, 100, paint); + paint.setImageFilter(SkNEW_ARGS(SkDisplacementMapEffect, + (SkDisplacementMapEffect::kR_ChannelSelectorType, + SkDisplacementMapEffect::kA_ChannelSelectorType, 0.5f, displ)))->unref(); + drawClippedBitmap(canvas, 400, 100, paint); + } + +private: + typedef GM INHERITED; + SkBitmap fBitmap, fCheckerboard; + bool fInitialized; +}; + +////////////////////////////////////////////////////////////////////////////// + +static GM* MyFactory(void*) { return new DisplacementMapGM; } +static GMRegistry reg(MyFactory); + +} -- cgit v1.2.3