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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
getInfo(SkImageInfo * info)11 bool SkImageGenerator::getInfo(SkImageInfo* info) {
12     SkImageInfo dummy;
13     if (NULL == info) {
14         info = &dummy;
15     }
16     return this->onGetInfo(info);
17 }
18 
getPixels(const SkImageInfo & info,void * pixels,size_t rowBytes,SkPMColor ctable[],int * ctableCount)19 bool 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 
getPixels(const SkImageInfo & info,void * pixels,size_t rowBytes)51 bool 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 
getYUV8Planes(SkISize sizes[3],void * planes[3],size_t rowBytes[3],SkYUVColorSpace * colorSpace)60 bool 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 
onGetYUV8Planes(SkISize sizes[3],void * planes[3],size_t rowBytes[3])96 bool SkImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3]) {
97     return false;
98 }
99 
onGetYUV8Planes(SkISize sizes[3],void * planes[3],size_t rowBytes[3],SkYUVColorSpace * colorSpace)100 bool 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 
onRefEncodedData()114 SkData* SkImageGenerator::onRefEncodedData() {
115     return NULL;
116 }
117 
onGetInfo(SkImageInfo *)118 bool SkImageGenerator::onGetInfo(SkImageInfo*) {
119     return false;
120 }
121 
onGetPixels(const SkImageInfo &,void *,size_t,SkPMColor *,int *)122 bool SkImageGenerator::onGetPixels(const SkImageInfo&, void*, size_t, SkPMColor*, int*) {
123     return false;
124 }
125