2 * Copyright 2012 The Android Open Source Project
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
8 #include "SkMergeImageFilter.h"
11 #include "SkReadBuffer.h"
12 #include "SkWriteBuffer.h"
13 #include "SkValidationUtils.h"
15 ///////////////////////////////////////////////////////////////////////////////
17 void SkMergeImageFilter::initAllocModes() {
18 int inputCount = countInputs();
20 size_t size = sizeof(uint8_t) * inputCount;
21 if (size <= sizeof(fStorage)) {
22 fModes = SkTCast<uint8_t*>(fStorage);
24 fModes = SkTCast<uint8_t*>(sk_malloc_throw(size));
31 void SkMergeImageFilter::initModes(const SkXfermode::Mode modes[]) {
33 this->initAllocModes();
34 int inputCount = countInputs();
35 for (int i = 0; i < inputCount; ++i) {
36 fModes[i] = SkToU8(modes[i]);
43 SkMergeImageFilter::SkMergeImageFilter(SkImageFilter* filters[], int count,
44 const SkXfermode::Mode modes[],
45 const CropRect* cropRect) : INHERITED(count, filters, cropRect) {
47 this->initModes(modes);
50 SkMergeImageFilter::~SkMergeImageFilter() {
52 if (fModes != SkTCast<uint8_t*>(fStorage)) {
57 bool SkMergeImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
59 SkBitmap* result, SkIPoint* offset) const {
60 if (countInputs() < 1) {
65 if (!this->applyCropRect(ctx, src, SkIPoint::Make(0, 0), &bounds)) {
69 const int x0 = bounds.left();
70 const int y0 = bounds.top();
72 SkAutoTUnref<SkBaseDevice> dst(proxy->createDevice(bounds.width(), bounds.height()));
79 int inputCount = countInputs();
80 for (int i = 0; i < inputCount; ++i) {
82 const SkBitmap* srcPtr;
83 SkIPoint pos = SkIPoint::Make(0, 0);
84 SkImageFilter* filter = getInput(i);
86 if (!filter->filterImage(proxy, src, ctx, &tmp, &pos)) {
95 paint.setXfermodeMode((SkXfermode::Mode)fModes[i]);
97 paint.setXfermode(NULL);
99 canvas.drawSprite(*srcPtr, pos.x() - x0, pos.y() - y0, &paint);
102 offset->fX = bounds.left();
103 offset->fY = bounds.top();
104 *result = dst->accessBitmap(false);
108 void SkMergeImageFilter::flatten(SkWriteBuffer& buffer) const {
109 this->INHERITED::flatten(buffer);
111 buffer.writeBool(fModes != NULL);
113 buffer.writeByteArray(fModes, countInputs() * sizeof(fModes[0]));
117 SkMergeImageFilter::SkMergeImageFilter(SkReadBuffer& buffer)
118 : INHERITED(-1, buffer) {
119 bool hasModes = buffer.readBool();
121 this->initAllocModes();
122 int nbInputs = countInputs();
123 size_t size = nbInputs * sizeof(fModes[0]);
124 SkASSERT(buffer.getArrayCount() == size);
125 if (buffer.validate(buffer.getArrayCount() == size) &&
126 buffer.readByteArray(fModes, size)) {
127 for (int i = 0; i < nbInputs; ++i) {
128 buffer.validate(SkIsValidMode((SkXfermode::Mode)fModes[i]));