3019a9172b
* Add Source of fb2png to TWRP tree * Android.mk by PhilZ-cwm6 * Makefile for CrossCompiling via external toolchan by me (Talustus) Change-Id: If9680688df6e4c9c567f74f46dfc303566b868ba
133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/*
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* -- http://android-fb2png.googlecode.com/svn/trunk/fb.c --
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*
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* Copyright 2011, Kyan He <kyan.ql.he@gmail.com>
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*
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <errno.h>
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#include "log.h"
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#include "fb.h"
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#include "img_process.h"
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void fb_dump(const struct fb* fb)
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{
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D("%12s : %d", "bpp", fb->bpp);
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D("%12s : %d", "size", fb->size);
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D("%12s : %d", "width", fb->width);
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D("%12s : %d", "height", fb->height);
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D("%12s : %d %d %d %d", "ARGB offset",
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fb->alpha_offset, fb->red_offset,
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fb->green_offset, fb->blue_offset);
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D("%12s : %d %d %d %d", "ARGB length",
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fb->alpha_length, fb->red_length,
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fb->green_length, fb->blue_length);
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}
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/**
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* Returns the format of fb.
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*/
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static int fb_get_format(const struct fb *fb)
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{
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int ao = fb->alpha_offset;
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int ro = fb->red_offset;
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int go = fb->green_offset;
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int bo = fb->blue_offset;
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#define FB_FORMAT_UNKNOWN 0
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#define FB_FORMAT_RGB565 1
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#define FB_FORMAT_ARGB8888 2
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#define FB_FORMAT_RGBA8888 3
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#define FB_FORMAT_ABGR8888 4
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#define FB_FORMAT_BGRA8888 5
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/* TODO: use offset */
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if (fb->bpp == 16)
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return FB_FORMAT_RGB565;
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/* TODO: validate */
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if (ao == 0 && ro == 8)
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return FB_FORMAT_ARGB8888;
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if (ao == 0 && bo == 8)
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return FB_FORMAT_ABGR8888;
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if (ro == 0)
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return FB_FORMAT_RGBA8888;
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if (bo == 0)
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return FB_FORMAT_BGRA8888;
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/* fallback */
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return FB_FORMAT_UNKNOWN;
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}
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int fb_save_png(const struct fb *fb, const char *path)
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{
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char *rgb_matrix;
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int ret = -1;
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/* Allocate RGB Matrix. */
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rgb_matrix = malloc(fb->width * fb->height * 3);
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if(!rgb_matrix) {
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free(rgb_matrix);
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return -1;
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}
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int fmt = fb_get_format(fb);
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D("Framebuffer Pixel Format: %d", fmt);
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switch(fmt) {
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case FB_FORMAT_RGB565:
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/* emulator use rgb565 */
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ret = rgb565_to_rgb888(fb->data,
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rgb_matrix, fb->width * fb->height);
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break;
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case FB_FORMAT_ARGB8888:
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/* most devices use argb8888 */
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ret = argb8888_to_rgb888(fb->data,
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rgb_matrix, fb->width * fb->height);
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break;
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case FB_FORMAT_ABGR8888:
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ret = abgr8888_to_rgb888(fb->data,
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rgb_matrix, fb->width * fb->height);
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break;
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case FB_FORMAT_BGRA8888:
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ret = bgra8888_to_rgb888(fb->data,
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rgb_matrix, fb->width * fb->height);
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break;
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case FB_FORMAT_RGBA8888:
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ret = rgba8888_to_rgb888(fb->data,
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rgb_matrix, fb->width * fb->height);
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break;
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default:
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D("Unsupported framebuffer type.");
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break;
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}
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if (ret != 0)
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D("Error while processing input image.");
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else if (0 != (ret = save_png(path, rgb_matrix, fb->width, fb->height)))
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D("Failed to save in PNG format.");
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free(rgb_matrix);
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return ret;
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}
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