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