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authorElliott Hughes2015-04-10 15:12:05 -0500
committerElliott Hughes2015-04-10 15:42:55 -0500
commit07cfb8fe799901948afd6af05ef4674173713bcb (patch)
treedbb3c6ea45cb910397cec50054460d46c99b454f /minui/resources.cpp
parent5d1630a926a02ca13a66eb1e385eabba16b04cfc (diff)
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Switch minui over to C++.
Change-Id: I59e08a304ae514a3fdb6fab58721f11670bc1b01
Diffstat (limited to 'minui/resources.cpp')
-rw-r--r--minui/resources.cpp461
1 files changed, 461 insertions, 0 deletions
diff --git a/minui/resources.cpp b/minui/resources.cpp
new file mode 100644
index 00000000..fa413b60
--- /dev/null
+++ b/minui/resources.cpp
@@ -0,0 +1,461 @@
1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdlib.h>
18#include <string.h>
19#include <unistd.h>
20
21#include <fcntl.h>
22#include <stdio.h>
23
24#include <sys/ioctl.h>
25#include <sys/mman.h>
26#include <sys/types.h>
27
28#include <linux/fb.h>
29#include <linux/kd.h>
30
31#include <png.h>
32
33#include "minui.h"
34
35extern char* locale;
36
37#define SURFACE_DATA_ALIGNMENT 8
38
39static gr_surface malloc_surface(size_t data_size) {
40 size_t size = sizeof(GRSurface) + data_size + SURFACE_DATA_ALIGNMENT;
41 unsigned char* temp = reinterpret_cast<unsigned char*>(malloc(size));
42 if (temp == NULL) return NULL;
43 gr_surface surface = (gr_surface) temp;
44 surface->data = temp + sizeof(GRSurface) +
45 (SURFACE_DATA_ALIGNMENT - (sizeof(GRSurface) % SURFACE_DATA_ALIGNMENT));
46 return surface;
47}
48
49static int open_png(const char* name, png_structp* png_ptr, png_infop* info_ptr,
50 png_uint_32* width, png_uint_32* height, png_byte* channels) {
51 char resPath[256];
52 unsigned char header[8];
53 int result = 0;
54 int color_type, bit_depth;
55 size_t bytesRead;
56
57 snprintf(resPath, sizeof(resPath)-1, "/res/images/%s.png", name);
58 resPath[sizeof(resPath)-1] = '\0';
59 FILE* fp = fopen(resPath, "rb");
60 if (fp == NULL) {
61 result = -1;
62 goto exit;
63 }
64
65 bytesRead = fread(header, 1, sizeof(header), fp);
66 if (bytesRead != sizeof(header)) {
67 result = -2;
68 goto exit;
69 }
70
71 if (png_sig_cmp(header, 0, sizeof(header))) {
72 result = -3;
73 goto exit;
74 }
75
76 *png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
77 if (!*png_ptr) {
78 result = -4;
79 goto exit;
80 }
81
82 *info_ptr = png_create_info_struct(*png_ptr);
83 if (!*info_ptr) {
84 result = -5;
85 goto exit;
86 }
87
88 if (setjmp(png_jmpbuf(*png_ptr))) {
89 result = -6;
90 goto exit;
91 }
92
93 png_init_io(*png_ptr, fp);
94 png_set_sig_bytes(*png_ptr, sizeof(header));
95 png_read_info(*png_ptr, *info_ptr);
96
97 png_get_IHDR(*png_ptr, *info_ptr, width, height, &bit_depth,
98 &color_type, NULL, NULL, NULL);
99
100 *channels = png_get_channels(*png_ptr, *info_ptr);
101
102 if (bit_depth == 8 && *channels == 3 && color_type == PNG_COLOR_TYPE_RGB) {
103 // 8-bit RGB images: great, nothing to do.
104 } else if (bit_depth <= 8 && *channels == 1 && color_type == PNG_COLOR_TYPE_GRAY) {
105 // 1-, 2-, 4-, or 8-bit gray images: expand to 8-bit gray.
106 png_set_expand_gray_1_2_4_to_8(*png_ptr);
107 } else if (bit_depth <= 8 && *channels == 1 && color_type == PNG_COLOR_TYPE_PALETTE) {
108 // paletted images: expand to 8-bit RGB. Note that we DON'T
109 // currently expand the tRNS chunk (if any) to an alpha
110 // channel, because minui doesn't support alpha channels in
111 // general.
112 png_set_palette_to_rgb(*png_ptr);
113 *channels = 3;
114 } else {
115 fprintf(stderr, "minui doesn't support PNG depth %d channels %d color_type %d\n",
116 bit_depth, *channels, color_type);
117 result = -7;
118 goto exit;
119 }
120
121 return result;
122
123 exit:
124 if (result < 0) {
125 png_destroy_read_struct(png_ptr, info_ptr, NULL);
126 }
127 if (fp != NULL) {
128 fclose(fp);
129 }
130
131 return result;
132}
133
134// "display" surfaces are transformed into the framebuffer's required
135// pixel format (currently only RGBX is supported) at load time, so
136// gr_blit() can be nothing more than a memcpy() for each row. The
137// next two functions are the only ones that know anything about the
138// framebuffer pixel format; they need to be modified if the
139// framebuffer format changes (but nothing else should).
140
141// Allocate and return a gr_surface sufficient for storing an image of
142// the indicated size in the framebuffer pixel format.
143static gr_surface init_display_surface(png_uint_32 width, png_uint_32 height) {
144 gr_surface surface;
145
146 surface = malloc_surface(width * height * 4);
147 if (surface == NULL) return NULL;
148
149 surface->width = width;
150 surface->height = height;
151 surface->row_bytes = width * 4;
152 surface->pixel_bytes = 4;
153
154 return surface;
155}
156
157// Copy 'input_row' to 'output_row', transforming it to the
158// framebuffer pixel format. The input format depends on the value of
159// 'channels':
160//
161// 1 - input is 8-bit grayscale
162// 3 - input is 24-bit RGB
163// 4 - input is 32-bit RGBA/RGBX
164//
165// 'width' is the number of pixels in the row.
166static void transform_rgb_to_draw(unsigned char* input_row,
167 unsigned char* output_row,
168 int channels, int width) {
169 int x;
170 unsigned char* ip = input_row;
171 unsigned char* op = output_row;
172
173 switch (channels) {
174 case 1:
175 // expand gray level to RGBX
176 for (x = 0; x < width; ++x) {
177 *op++ = *ip;
178 *op++ = *ip;
179 *op++ = *ip;
180 *op++ = 0xff;
181 ip++;
182 }
183 break;
184
185 case 3:
186 // expand RGBA to RGBX
187 for (x = 0; x < width; ++x) {
188 *op++ = *ip++;
189 *op++ = *ip++;
190 *op++ = *ip++;
191 *op++ = 0xff;
192 }
193 break;
194
195 case 4:
196 // copy RGBA to RGBX
197 memcpy(output_row, input_row, width*4);
198 break;
199 }
200}
201
202int res_create_display_surface(const char* name, gr_surface* pSurface) {
203 gr_surface surface = NULL;
204 int result = 0;
205 png_structp png_ptr = NULL;
206 png_infop info_ptr = NULL;
207 png_uint_32 width, height;
208 png_byte channels;
209 unsigned char* p_row;
210 unsigned int y;
211
212 *pSurface = NULL;
213
214 result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
215 if (result < 0) return result;
216
217 surface = init_display_surface(width, height);
218 if (surface == NULL) {
219 result = -8;
220 goto exit;
221 }
222
223#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
224 png_set_bgr(png_ptr);
225#endif
226
227 p_row = reinterpret_cast<unsigned char*>(malloc(width * 4));
228 for (y = 0; y < height; ++y) {
229 png_read_row(png_ptr, p_row, NULL);
230 transform_rgb_to_draw(p_row, surface->data + y * surface->row_bytes, channels, width);
231 }
232 free(p_row);
233
234 *pSurface = surface;
235
236 exit:
237 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
238 if (result < 0 && surface != NULL) free(surface);
239 return result;
240}
241
242int res_create_multi_display_surface(const char* name, int* frames, gr_surface** pSurface) {
243 gr_surface* surface = NULL;
244 int result = 0;
245 png_structp png_ptr = NULL;
246 png_infop info_ptr = NULL;
247 png_uint_32 width, height;
248 png_byte channels;
249 int i;
250 png_textp text;
251 int num_text;
252 unsigned char* p_row;
253 unsigned int y;
254
255 *pSurface = NULL;
256 *frames = -1;
257
258 result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
259 if (result < 0) return result;
260
261 *frames = 1;
262 if (png_get_text(png_ptr, info_ptr, &text, &num_text)) {
263 for (i = 0; i < num_text; ++i) {
264 if (text[i].key && strcmp(text[i].key, "Frames") == 0 && text[i].text) {
265 *frames = atoi(text[i].text);
266 break;
267 }
268 }
269 printf(" found frames = %d\n", *frames);
270 }
271
272 if (height % *frames != 0) {
273 printf("bad height (%d) for frame count (%d)\n", height, *frames);
274 result = -9;
275 goto exit;
276 }
277
278 surface = reinterpret_cast<gr_surface*>(malloc(*frames * sizeof(gr_surface)));
279 if (surface == NULL) {
280 result = -8;
281 goto exit;
282 }
283 for (i = 0; i < *frames; ++i) {
284 surface[i] = init_display_surface(width, height / *frames);
285 if (surface[i] == NULL) {
286 result = -8;
287 goto exit;
288 }
289 }
290
291#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
292 png_set_bgr(png_ptr);
293#endif
294
295 p_row = reinterpret_cast<unsigned char*>(malloc(width * 4));
296 for (y = 0; y < height; ++y) {
297 png_read_row(png_ptr, p_row, NULL);
298 int frame = y % *frames;
299 unsigned char* out_row = surface[frame]->data +
300 (y / *frames) * surface[frame]->row_bytes;
301 transform_rgb_to_draw(p_row, out_row, channels, width);
302 }
303 free(p_row);
304
305 *pSurface = (gr_surface*) surface;
306
307exit:
308 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
309
310 if (result < 0) {
311 if (surface) {
312 for (i = 0; i < *frames; ++i) {
313 if (surface[i]) free(surface[i]);
314 }
315 free(surface);
316 }
317 }
318 return result;
319}
320
321int res_create_alpha_surface(const char* name, gr_surface* pSurface) {
322 gr_surface surface = NULL;
323 int result = 0;
324 png_structp png_ptr = NULL;
325 png_infop info_ptr = NULL;
326 png_uint_32 width, height;
327 png_byte channels;
328
329 *pSurface = NULL;
330
331 result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
332 if (result < 0) return result;
333
334 if (channels != 1) {
335 result = -7;
336 goto exit;
337 }
338
339 surface = malloc_surface(width * height);
340 if (surface == NULL) {
341 result = -8;
342 goto exit;
343 }
344 surface->width = width;
345 surface->height = height;
346 surface->row_bytes = width;
347 surface->pixel_bytes = 1;
348
349#if defined(RECOVERY_ABGR) || defined(RECOVERY_BGRA)
350 png_set_bgr(png_ptr);
351#endif
352
353 unsigned char* p_row;
354 unsigned int y;
355 for (y = 0; y < height; ++y) {
356 p_row = surface->data + y * surface->row_bytes;
357 png_read_row(png_ptr, p_row, NULL);
358 }
359
360 *pSurface = surface;
361
362 exit:
363 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
364 if (result < 0 && surface != NULL) free(surface);
365 return result;
366}
367
368static int matches_locale(const char* loc, const char* locale) {
369 if (locale == NULL) return 0;
370
371 if (strcmp(loc, locale) == 0) return 1;
372
373 // if loc does *not* have an underscore, and it matches the start
374 // of locale, and the next character in locale *is* an underscore,
375 // that's a match. For instance, loc == "en" matches locale ==
376 // "en_US".
377
378 int i;
379 for (i = 0; loc[i] != 0 && loc[i] != '_'; ++i);
380 if (loc[i] == '_') return 0;
381
382 return (strncmp(locale, loc, i) == 0 && locale[i] == '_');
383}
384
385int res_create_localized_alpha_surface(const char* name,
386 const char* locale,
387 gr_surface* pSurface) {
388 gr_surface surface = NULL;
389 int result = 0;
390 png_structp png_ptr = NULL;
391 png_infop info_ptr = NULL;
392 png_uint_32 width, height;
393 png_byte channels;
394 unsigned char* row;
395 png_uint_32 y;
396
397 *pSurface = NULL;
398
399 if (locale == NULL) {
400 surface = malloc_surface(0);
401 surface->width = 0;
402 surface->height = 0;
403 surface->row_bytes = 0;
404 surface->pixel_bytes = 1;
405 goto exit;
406 }
407
408 result = open_png(name, &png_ptr, &info_ptr, &width, &height, &channels);
409 if (result < 0) return result;
410
411 if (channels != 1) {
412 result = -7;
413 goto exit;
414 }
415
416 row = reinterpret_cast<unsigned char*>(malloc(width));
417 for (y = 0; y < height; ++y) {
418 png_read_row(png_ptr, row, NULL);
419 int w = (row[1] << 8) | row[0];
420 int h = (row[3] << 8) | row[2];
421 int len = row[4];
422 char* loc = (char*)row+5;
423
424 if (y+1+h >= height || matches_locale(loc, locale)) {
425 printf(" %20s: %s (%d x %d @ %d)\n", name, loc, w, h, y);
426
427 surface = malloc_surface(w*h);
428 if (surface == NULL) {
429 result = -8;
430 goto exit;
431 }
432 surface->width = w;
433 surface->height = h;
434 surface->row_bytes = w;
435 surface->pixel_bytes = 1;
436
437 int i;
438 for (i = 0; i < h; ++i, ++y) {
439 png_read_row(png_ptr, row, NULL);
440 memcpy(surface->data + i*w, row, w);
441 }
442
443 *pSurface = (gr_surface) surface;
444 break;
445 } else {
446 int i;
447 for (i = 0; i < h; ++i, ++y) {
448 png_read_row(png_ptr, row, NULL);
449 }
450 }
451 }
452
453exit:
454 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
455 if (result < 0 && surface != NULL) free(surface);
456 return result;
457}
458
459void res_free_surface(gr_surface surface) {
460 free(surface);
461}