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gfx/skia/trunk/src/image/SkImagePriv.cpp@6474c204b198 (annotated)

gfx/skia/trunk/src/image/SkImagePriv.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0	1	/*
michael@0	2	* Copyright 2012 Google Inc.
michael@0	3	*
michael@0	4	* Use of this source code is governed by a BSD-style license that can be
michael@0	5	* found in the LICENSE file.
michael@0	6	*/
michael@0	7
michael@0	8	#include "SkImagePriv.h"
michael@0	9	#include "SkCanvas.h"
michael@0	10	#include "SkPicture.h"
michael@0	11
michael@0	12	SkBitmap::Config SkColorTypeToBitmapConfig(SkColorType colorType) {
michael@0	13	switch (colorType) {
michael@0	14	case kAlpha_8_SkColorType:
michael@0	15	return SkBitmap::kA8_Config;
michael@0	16
michael@0	17	case kARGB_4444_SkColorType:
michael@0	18	return SkBitmap::kARGB_4444_Config;
michael@0	19
michael@0	20	case kRGB_565_SkColorType:
michael@0	21	return SkBitmap::kRGB_565_Config;
michael@0	22
michael@0	23	case kPMColor_SkColorType:
michael@0	24	return SkBitmap::kARGB_8888_Config;
michael@0	25
michael@0	26	case kIndex_8_SkColorType:
michael@0	27	return SkBitmap::kIndex8_Config;
michael@0	28
michael@0	29	default:
michael@0	30	// break for unsupported colortypes
michael@0	31	break;
michael@0	32	}
michael@0	33	return SkBitmap::kNo_Config;
michael@0	34	}
michael@0	35
michael@0	36	SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo& info) {
michael@0	37	return SkColorTypeToBitmapConfig(info.fColorType);
michael@0	38	}
michael@0	39
michael@0	40	SkColorType SkBitmapConfigToColorType(SkBitmap::Config config) {
michael@0	41	static const SkColorType gCT[] = {
michael@0	42	kUnknown_SkColorType, // kNo_Config
michael@0	43	kAlpha_8_SkColorType, // kA8_Config
michael@0	44	kIndex_8_SkColorType, // kIndex8_Config
michael@0	45	kRGB_565_SkColorType, // kRGB_565_Config
michael@0	46	kARGB_4444_SkColorType, // kARGB_4444_Config
michael@0	47	kPMColor_SkColorType, // kARGB_8888_Config
michael@0	48	};
michael@0	49	SkASSERT((unsigned)config < SK_ARRAY_COUNT(gCT));
michael@0	50	return gCT[config];
michael@0	51	}
michael@0	52
michael@0	53	SkImage* SkNewImageFromBitmap(const SkBitmap& bm, bool canSharePixelRef) {
michael@0	54	SkImageInfo info;
michael@0	55	if (!bm.asImageInfo(&info)) {
michael@0	56	return NULL;
michael@0	57	}
michael@0	58
michael@0	59	SkImage* image = NULL;
michael@0	60	if (canSharePixelRef || bm.isImmutable()) {
michael@0	61	image = SkNewImageFromPixelRef(info, bm.pixelRef(), bm.rowBytes());
michael@0	62	} else {
michael@0	63	bm.lockPixels();
michael@0	64	if (bm.getPixels()) {
michael@0	65	image = SkImage::NewRasterCopy(info, bm.getPixels(), bm.rowBytes());
michael@0	66	}
michael@0	67	bm.unlockPixels();
michael@0	68	}
michael@0	69	return image;
michael@0	70	}
michael@0	71
michael@0	72	static bool needs_layer(const SkPaint& paint) {
michael@0	73	return 0xFF != paint.getAlpha() ||
michael@0	74	paint.getColorFilter() ||
michael@0	75	paint.getImageFilter() ||
michael@0	76	SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode);
michael@0	77	}
michael@0	78
michael@0	79	void SkImagePrivDrawPicture(SkCanvas* canvas, SkPicture* picture,
michael@0	80	SkScalar x, SkScalar y, const SkPaint* paint) {
michael@0	81	int saveCount = canvas->getSaveCount();
michael@0	82
michael@0	83	if (paint && needs_layer(*paint)) {
michael@0	84	SkRect bounds;
michael@0	85	bounds.set(x, y,
michael@0	86	x + SkIntToScalar(picture->width()),
michael@0	87	y + SkIntToScalar(picture->height()));
michael@0	88	canvas->saveLayer(&bounds, paint);
michael@0	89	canvas->translate(x, y);
michael@0	90	} else if (x || y) {
michael@0	91	canvas->save();
michael@0	92	canvas->translate(x, y);
michael@0	93	}
michael@0	94
michael@0	95	canvas->drawPicture(*picture);
michael@0	96	canvas->restoreToCount(saveCount);
michael@0	97	}
michael@0	98
michael@0	99	void SkImagePrivDrawPicture(SkCanvas* canvas, SkPicture* picture,
michael@0	100	const SkRect* src, const SkRect& dst, const SkPaint* paint) {
michael@0	101	int saveCount = canvas->getSaveCount();
michael@0	102
michael@0	103	SkMatrix matrix;
michael@0	104	SkRect tmpSrc;
michael@0	105
michael@0	106	if (NULL != src) {
michael@0	107	tmpSrc = *src;
michael@0	108	} else {
michael@0	109	tmpSrc.set(0, 0,
michael@0	110	SkIntToScalar(picture->width()),
michael@0	111	SkIntToScalar(picture->height()));
michael@0	112	}
michael@0	113
michael@0	114	matrix.setRectToRect(tmpSrc, dst, SkMatrix::kFill_ScaleToFit);
michael@0	115	if (paint && needs_layer(*paint)) {
michael@0	116	canvas->saveLayer(&dst, paint);
michael@0	117	} else {
michael@0	118	canvas->save();
michael@0	119	}
michael@0	120	canvas->concat(matrix);
michael@0	121	if (!paint || !needs_layer(*paint)) {
michael@0	122	canvas->clipRect(tmpSrc);
michael@0	123	}
michael@0	124
michael@0	125	canvas->drawPicture(*picture);
michael@0	126	canvas->restoreToCount(saveCount);
michael@0	127	}