1/*
2 * Copyright 2014 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 */
7
8#include "SkImageGenerator.h"
9
10#ifndef SK_SUPPORT_LEGACY_IMAGEGENERATORAPI
11bool SkImageGenerator::getInfo(SkImageInfo* info) {
12    SkImageInfo dummy;
13    if (NULL == info) {
14        info = &dummy;
15    }
16    return this->onGetInfo(info);
17}
18
19bool SkImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
20                                 SkPMColor ctable[], int* ctableCount) {
21    if (kUnknown_SkColorType == info.colorType()) {
22        return false;
23    }
24    if (NULL == pixels) {
25        return false;
26    }
27    if (rowBytes < info.minRowBytes()) {
28        return false;
29    }
30
31    if (kIndex_8_SkColorType == info.colorType()) {
32        if (NULL == ctable || NULL == ctableCount) {
33            return false;
34        }
35    } else {
36        if (ctableCount) {
37            *ctableCount = 0;
38        }
39        ctableCount = NULL;
40        ctable = NULL;
41    }
42
43    bool success = this->onGetPixels(info, pixels, rowBytes, ctable, ctableCount);
44
45    if (success && ctableCount) {
46        SkASSERT(*ctableCount >= 0 && *ctableCount <= 256);
47    }
48    return success;
49}
50
51bool SkImageGenerator::getPixels(const SkImageInfo& info, void* pixels, size_t rowBytes) {
52    SkASSERT(kIndex_8_SkColorType != info.colorType());
53    if (kIndex_8_SkColorType == info.colorType()) {
54        return false;
55    }
56    return this->getPixels(info, pixels, rowBytes, NULL, NULL);
57}
58#endif
59
60bool SkImageGenerator::getYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
61                                     SkYUVColorSpace* colorSpace) {
62#ifdef SK_DEBUG
63    // In all cases, we need the sizes array
64    SkASSERT(sizes);
65
66    bool isValidWithPlanes = (planes) && (rowBytes) &&
67        ((planes[0]) && (planes[1]) && (planes[2]) &&
68         (0  != rowBytes[0]) && (0  != rowBytes[1]) && (0  != rowBytes[2]));
69    bool isValidWithoutPlanes =
70        ((NULL == planes) ||
71         ((NULL == planes[0]) && (NULL == planes[1]) && (NULL == planes[2]))) &&
72        ((NULL == rowBytes) ||
73         ((0 == rowBytes[0]) && (0 == rowBytes[1]) && (0 == rowBytes[2])));
74
75    // Either we have all planes and rowBytes information or we have none of it
76    // Having only partial information is not supported
77    SkASSERT(isValidWithPlanes || isValidWithoutPlanes);
78
79    // If we do have planes information, make sure all sizes are non 0
80    // and all rowBytes are valid
81    SkASSERT(!isValidWithPlanes ||
82             ((sizes[0].fWidth  >= 0) &&
83              (sizes[0].fHeight >= 0) &&
84              (sizes[1].fWidth  >= 0) &&
85              (sizes[1].fHeight >= 0) &&
86              (sizes[2].fWidth  >= 0) &&
87              (sizes[2].fHeight >= 0) &&
88              (rowBytes[0] >= (size_t)sizes[0].fWidth) &&
89              (rowBytes[1] >= (size_t)sizes[1].fWidth) &&
90              (rowBytes[2] >= (size_t)sizes[2].fWidth)));
91#endif
92
93    return this->onGetYUV8Planes(sizes, planes, rowBytes, colorSpace);
94}
95
96bool SkImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3]) {
97    return false;
98}
99
100bool SkImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3],
101                                       SkYUVColorSpace* colorSpace) {
102    // In order to maintain compatibility with clients that implemented the original
103    // onGetYUV8Planes interface, we assume that the color space is JPEG.
104    // TODO(rileya): remove this and the old onGetYUV8Planes once clients switch over to
105    // the new interface.
106    if (colorSpace) {
107        *colorSpace = kJPEG_SkYUVColorSpace;
108    }
109    return this->onGetYUV8Planes(sizes, planes, rowBytes);
110}
111
112/////////////////////////////////////////////////////////////////////////////////////////////
113
114SkData* SkImageGenerator::onRefEncodedData() {
115    return NULL;
116}
117
118bool SkImageGenerator::onGetInfo(SkImageInfo*) {
119    return false;
120}
121
122bool SkImageGenerator::onGetPixels(const SkImageInfo&, void*, size_t, SkPMColor*, int*) {
123    return false;
124}
125