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Side by Side Diff: gm/etc1bitmap.cpp

Issue 1830723002: Revert of Delete SkImageDecoder (Closed) Base URL: https://skia.googlesource.com/skia.git@fix-animator
Patch Set: Created 4 years, 9 months ago
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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 "gm.h"
9
10 #include "Resources.h"
11 #include "SkCanvas.h"
12 #include "SkData.h"
13 #include "SkImage.h"
14 #include "SkImageGenerator.h"
15 #include "SkOSFile.h"
16 #include "SkTemplates.h"
17
18 #ifndef SK_IGNORE_ETC1_SUPPORT
19
20 #include "etc1.h"
21
22 /**
23 * Remove the last row and column of ETC1 blocks, effectively
24 * making a texture that started as power of two into a texture
25 * that is no longer power of two...
26 */
27 bool slice_etc1_data(void *data, int* width, int* height) {
28
29 // First, parse the data and get to it...
30 etc1_byte *origData = reinterpret_cast<etc1_byte *>(data);
31 if (!etc1_pkm_is_valid(origData)) {
32 return false;
33 }
34
35 int origW = etc1_pkm_get_width(origData);
36 int origH = etc1_pkm_get_height(origData);
37
38 int blockWidth = (origW + 3) >> 2;
39 int blockHeight = (origH + 3) >> 2;
40
41 // Make sure that we have blocks to trim off..
42 if (blockWidth < 2 || blockHeight < 2) {
43 return false;
44 }
45
46 int newWidth = (blockWidth - 1) << 2;
47 int newHeight = (blockHeight - 1) << 2;
48
49 size_t newDataSz = etc1_get_encoded_data_size(newWidth, newHeight) + ETC_PKM _HEADER_SIZE;
50 SkAutoTMalloc<etc1_byte> am(newDataSz);
51
52 etc1_byte* newData = am.get();
53
54 etc1_pkm_format_header(newData, newWidth, newHeight);
55 newData += ETC_PKM_HEADER_SIZE;
56 origData += ETC_PKM_HEADER_SIZE;
57
58 for (int j = 0; j < blockHeight - 1; ++j) {
59 memcpy(newData, origData, (blockWidth - 1)*ETC1_ENCODED_BLOCK_SIZE);
60 origData += blockWidth*ETC1_ENCODED_BLOCK_SIZE;
61 newData += (blockWidth - 1)*ETC1_ENCODED_BLOCK_SIZE;
62 }
63
64 // Stick the data back whence it came
65 memcpy(data, am.get(), newDataSz);
66 *width = newWidth;
67 *height = newHeight;
68
69 return true;
70 }
71 #endif // SK_IGNORE_ETC1_SUPPORT
72
73 namespace skiagm {
74
75 /**
76 * Test decoding an image from a PKM or KTX file and then
77 * from compressed ETC1 data.
78 */
79 class ETC1BitmapGM : public GM {
80 public:
81 ETC1BitmapGM() { }
82 virtual ~ETC1BitmapGM() { }
83
84 protected:
85 SkString onShortName() override {
86 SkString str = SkString("etc1bitmap_");
87 str.append(this->fileExtension());
88 return str;
89 }
90
91 SkISize onISize() override {
92 return SkISize::Make(128, 128);
93 }
94
95 virtual SkString fileExtension() const = 0;
96
97 void onDraw(SkCanvas* canvas) override {
98 SkBitmap bm;
99 SkString filename = GetResourcePath("mandrill_128.");
100 filename.append(this->fileExtension());
101 sk_sp<SkData> fileData(SkData::MakeFromFileName(filename.c_str()));
102 if (nullptr == fileData) {
103 SkDebugf("Could not open the file. Did you forget to set the resourc ePath?\n");
104 return;
105 }
106
107 sk_sp<SkImage> image(SkImage::MakeFromEncoded(std::move(fileData)));
108 if (nullptr == image) {
109 SkDebugf("Could not decode the ETC file. ETC may not be included in this platform.\n");
110 return;
111 }
112 canvas->drawImage(image, 0, 0);
113 }
114
115 private:
116 typedef GM INHERITED;
117 };
118
119 // This class specializes ETC1BitmapGM to load the mandrill_128.pkm file.
120 class ETC1Bitmap_PKM_GM : public ETC1BitmapGM {
121 public:
122 ETC1Bitmap_PKM_GM() : ETC1BitmapGM() { }
123 virtual ~ETC1Bitmap_PKM_GM() { }
124
125 protected:
126
127 SkString fileExtension() const override { return SkString("pkm"); }
128
129 private:
130 typedef ETC1BitmapGM INHERITED;
131 };
132
133 // This class specializes ETC1BitmapGM to load the mandrill_128.ktx file.
134 class ETC1Bitmap_KTX_GM : public ETC1BitmapGM {
135 public:
136 ETC1Bitmap_KTX_GM() : ETC1BitmapGM() { }
137 virtual ~ETC1Bitmap_KTX_GM() { }
138
139 protected:
140
141 SkString fileExtension() const override { return SkString("ktx"); }
142
143 private:
144 typedef ETC1BitmapGM INHERITED;
145 };
146
147 // This class specializes ETC1BitmapGM to load the mandrill_128.r11.ktx file.
148 class ETC1Bitmap_R11_KTX_GM : public ETC1BitmapGM {
149 public:
150 ETC1Bitmap_R11_KTX_GM() : ETC1BitmapGM() { }
151 virtual ~ETC1Bitmap_R11_KTX_GM() { }
152
153 protected:
154
155 SkString fileExtension() const override { return SkString("r11.ktx"); }
156
157 private:
158 typedef ETC1BitmapGM INHERITED;
159 };
160
161 #ifndef SK_IGNORE_ETC1_SUPPORT
162 /**
163 * Test decoding an image from a PKM file and then
164 * from non-power-of-two compressed ETC1 data. First slice
165 * off a row and column of blocks in order to make it non-power
166 * of two.
167 */
168 class ETC1Bitmap_NPOT_GM : public GM {
169 public:
170 ETC1Bitmap_NPOT_GM() { }
171 virtual ~ETC1Bitmap_NPOT_GM() { }
172
173 protected:
174 SkString onShortName() override {
175 return SkString("etc1bitmap_npot");
176 }
177
178 SkISize onISize() override {
179 return SkISize::Make(124, 124);
180 }
181
182 void onDraw(SkCanvas* canvas) override {
183 SkBitmap bm;
184 SkString pkmFilename = GetResourcePath("mandrill_128.pkm");
185 SkAutoDataUnref fileData(SkData::NewFromFileName(pkmFilename.c_str()));
186 if (nullptr == fileData) {
187 SkDebugf("Could not open the file. Did you forget to set the resourc ePath?\n");
188 return;
189 }
190
191 SkAutoMalloc am(fileData->size());
192 memcpy(am.get(), fileData->data(), fileData->size());
193
194 int width, height;
195 if (!slice_etc1_data(am.get(), &width, &height)) {
196 SkDebugf("ETC1 Data is poorly formatted.\n");
197 return;
198 }
199
200 SkASSERT(124 == width);
201 SkASSERT(124 == height);
202
203 size_t dataSz = etc1_get_encoded_data_size(width, height) + ETC_PKM_HEAD ER_SIZE;
204 sk_sp<SkData> nonPOTData(SkData::MakeWithCopy(am.get(), dataSz));
205 canvas->drawImage(SkImage::MakeFromEncoded(std::move(nonPOTData)).get(), 0, 0);
206 }
207
208 private:
209 typedef GM INHERITED;
210 };
211 #endif // SK_IGNORE_ETC1_SUPPORT
212
213 } // namespace skiagm
214
215 //////////////////////////////////////////////////////////////////////////////
216
217 DEF_GM(return new skiagm::ETC1Bitmap_PKM_GM;)
218 DEF_GM(return new skiagm::ETC1Bitmap_KTX_GM;)
219 DEF_GM(return new skiagm::ETC1Bitmap_R11_KTX_GM;)
220
221 #ifndef SK_IGNORE_ETC1_SUPPORT
222 DEF_GM(return new skiagm::ETC1Bitmap_NPOT_GM;)
223 #endif // SK_IGNORE_ETC1_SUPPORT
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