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gerrit.twrp.me / android_bootable_recovery / d9b72008249b3ee9d1b37d461af058444e4bf5fe / . / fb2png / fb.c
blob: 2ed478902482485a59fbd145a4b1c917364c94f6 [file] [log] [blame]
Talustus3019a912013-04-06 11:50:07 +0200[diff] [blame]1/*
2 * -- http://android-fb2png.googlecode.com/svn/trunk/fb.c --
3 *
4 * Copyright 2011, Kyan He <kyan.ql.he@gmail.com>
5 *
6 *
7 * This program is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21#include <stdio.h>
22#include <stdlib.h>
23#include <unistd.h>
24#include <errno.h>
25
26#include "log.h"
27#include "fb.h"
28#include "img_process.h"
29
30void fb_dump(const struct fb* fb)
31{
32 D("%12s : %d", "bpp", fb->bpp);
33 D("%12s : %d", "size", fb->size);
34 D("%12s : %d", "width", fb->width);
35 D("%12s : %d", "height", fb->height);
36 D("%12s : %d %d %d %d", "ARGB offset",
37 fb->alpha_offset, fb->red_offset,
38 fb->green_offset, fb->blue_offset);
39 D("%12s : %d %d %d %d", "ARGB length",
40 fb->alpha_length, fb->red_length,
41 fb->green_length, fb->blue_length);
42}
43
44/**
45 * Returns the format of fb.
46 */
47static int fb_get_format(const struct fb *fb)
48{
49 int ao = fb->alpha_offset;
50 int ro = fb->red_offset;
51 int go = fb->green_offset;
52 int bo = fb->blue_offset;
53
54#define FB_FORMAT_UNKNOWN 0
55#define FB_FORMAT_RGB565 1
56#define FB_FORMAT_ARGB8888 2
57#define FB_FORMAT_RGBA8888 3
58#define FB_FORMAT_ABGR8888 4
59#define FB_FORMAT_BGRA8888 5
60
61 /* TODO: use offset */
62 if (fb->bpp == 16)
63 return FB_FORMAT_RGB565;
64
65 /* TODO: validate */
66 if (ao == 0 && ro == 8)
67 return FB_FORMAT_ARGB8888;
68
69 if (ao == 0 && bo == 8)
70 return FB_FORMAT_ABGR8888;
71
72 if (ro == 0)
73 return FB_FORMAT_RGBA8888;
74
75 if (bo == 0)
76 return FB_FORMAT_BGRA8888;
77
78 /* fallback */
79 return FB_FORMAT_UNKNOWN;
80}
81
82int fb_save_png(const struct fb *fb, const char *path)
83{
84 char *rgb_matrix;
85 int ret = -1;
86
87 /* Allocate RGB Matrix. */
88 rgb_matrix = malloc(fb->width * fb->height * 3);
89 if(!rgb_matrix) {
90 free(rgb_matrix);
91 return -1;
92 }
93
94 int fmt = fb_get_format(fb);
95 D("Framebuffer Pixel Format: %d", fmt);
96
97 switch(fmt) {
98 case FB_FORMAT_RGB565:
99 /* emulator use rgb565 */
100 ret = rgb565_to_rgb888(fb->data,
101 rgb_matrix, fb->width * fb->height);
102 break;
103 case FB_FORMAT_ARGB8888:
104 /* most devices use argb8888 */
105 ret = argb8888_to_rgb888(fb->data,
106 rgb_matrix, fb->width * fb->height);
107 break;
108 case FB_FORMAT_ABGR8888:
109 ret = abgr8888_to_rgb888(fb->data,
110 rgb_matrix, fb->width * fb->height);
111 break;
112 case FB_FORMAT_BGRA8888:
113 ret = bgra8888_to_rgb888(fb->data,
114 rgb_matrix, fb->width * fb->height);
115 break;
116 case FB_FORMAT_RGBA8888:
117 ret = rgba8888_to_rgb888(fb->data,
118 rgb_matrix, fb->width * fb->height);
119 break;
120 default:
121 D("Unsupported framebuffer type.");
122 break;
123 }
124
125 if (ret != 0)
126 D("Error while processing input image.");
127 else if (0 != (ret = save_png(path, rgb_matrix, fb->width, fb->height)))
128 D("Failed to save in PNG format.");
129
130 free(rgb_matrix);
131 return ret;
132}