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/**
* $Id$
*
* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version. The Blender
* Foundation also sells licenses for use in proprietary software under
* the Blender License. See http://www.blender.org/BL/ for information
* about this.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL/BL DUAL LICENSE BLOCK *****
*/
#ifdef _WIN32
#include "BLI_winstuff.h"
#endif
#include "BLI_blenlib.h"
#include "imbuf.h"
#include "imbuf_patch.h"
#include "IMB_imbuf_types.h"
#include "IMB_imbuf.h"
#include "IMB_allocimbuf.h"
#include "IMB_cmap.h"
#include "IMB_bmp.h"
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/* some code copied from article on microsoft.com, copied
here for enhanced BMP support in the future
http://www.microsoft.com/msj/defaultframe.asp?page=/msj/0197/mfcp1/mfcp1.htm&nav=/msj/0197/newnav.htm
*/
typedef struct BMPINFOHEADER{
unsigned int biSize;
unsigned int biWidth;
unsigned int biHeight;
unsigned short biPlanes;
unsigned short biBitCount;
unsigned int biCompression;
unsigned int biSizeImage;
unsigned int biXPelsPerMeter;
unsigned int biYPelsPerMeter;
unsigned int biClrUsed;
unsigned int biClrImportant;
} BMPINFOHEADER;
typedef struct BMPHEADER {
unsigned short biType;
unsigned int biSize;
unsigned short biRes1;
unsigned short biRes2;
unsigned int biOffBits;
} BMPHEADER;
#define BMP_FILEHEADER_SIZE 14
static int checkbmp(unsigned char *mem)
{
int ret_val = 0;
BMPINFOHEADER bmi;
unsigned int u;
if (mem) {
if ((mem[0] == 'B') && (mem[1] == 'M')) {
/* skip fileheader */
mem += BMP_FILEHEADER_SIZE;
} else {
}
/* for systems where an int needs to be 4 bytes aligned */
memcpy(&bmi, mem, sizeof(bmi));
u = LITTLE_LONG(bmi.biSize);
/* we only support uncompressed 24 or 32 bits images for now */
if (u >= sizeof(BMPINFOHEADER)) {
if ((bmi.biCompression == 0) && (bmi.biClrUsed == 0)) {
u = LITTLE_SHORT(bmi.biBitCount);
if (u >= 16) {
ret_val = 1;
}
}
}
}
return(ret_val);
}
int imb_is_a_bmp(void *buf) {
return checkbmp(buf);
}
struct ImBuf *imb_bmp_decode(unsigned char *mem, int size, int flags)
{
struct ImBuf *ibuf = 0;
BMPINFOHEADER bmi;
int x, y, depth, skip, i;
unsigned char *bmp, *rect;
unsigned short col;
if (checkbmp(mem) == 0) return(0);
if ((mem[0] == 'B') && (mem[1] == 'M')) {
/* skip fileheader */
mem += BMP_FILEHEADER_SIZE;
}
/* for systems where an int needs to be 4 bytes aligned */
memcpy(&bmi, mem, sizeof(bmi));
skip = LITTLE_LONG(bmi.biSize);
x = LITTLE_LONG(bmi.biWidth);
y = LITTLE_LONG(bmi.biHeight);
depth = LITTLE_SHORT(bmi.biBitCount);
/* printf("skip: %d, x: %d y: %d, depth: %d (%x)\n", skip, x, y,
depth, bmi.biBitCount); */
printf("skip: %d, x: %d y: %d, depth: %d (%x)\n", skip, x, y,
depth, bmi.biBitCount);
if (flags & IB_test) {
ibuf = IMB_allocImBuf(x, y, depth, 0, 0);
} else {
ibuf = IMB_allocImBuf(x, y, depth, IB_rect, 0);
bmp = mem + skip;
rect = (unsigned char *) ibuf->rect;
if (depth == 16) {
for (i = x * y; i > 0; i--) {
col = bmp[0] + (bmp[1] << 8);
rect[0] = ((col >> 10) & 0x1f) << 3;
rect[1] = ((col >> 5) & 0x1f) << 3;
rect[2] = ((col >> 0) & 0x1f) << 3;
rect[3] = 255;
rect += 4; bmp += 2;
}
} else if (depth == 24) {
for (i = x * y; i > 0; i--) {
rect[0] = bmp[2];
rect[1] = bmp[1];
rect[2] = bmp[0];
rect[3] = 255;
rect += 4; bmp += 3;
}
} else if (depth == 32) {
for (i = x * y; i > 0; i--) {
rect[0] = bmp[0];
rect[1] = bmp[1];
rect[2] = bmp[2];
rect[3] = bmp[3];
rect += 4; bmp += 4;
}
}
}
if (ibuf) {
ibuf->ftype = BMP;
}
return(ibuf);
}
/* Couple of helper functions for writing our data */
int putIntLSB(unsigned int ui,FILE *ofile) {
putc((ui>>0)&0xFF,ofile);
putc((ui>>8)&0xFF,ofile);
putc((ui>>16)&0xFF,ofile);
return putc((ui>>24)&0xFF,ofile);
}
int putShortLSB(unsigned short us,FILE *ofile) {
putc((us>>0)&0xFF,ofile);
return putc((us>>8)&0xFF,ofile);
}
/* Found write info at http://users.ece.gatech.edu/~slabaugh/personal/c/bitmapUnix.c */
short imb_savebmp(struct ImBuf *ibuf, int outfile, int flags) {
BMPINFOHEADER infoheader;
int bytesize, extrabytes, x, y, t, ptr;
uchar *data;
FILE *ofile;
extrabytes = (4 - ibuf->x*3 % 4) % 4;
bytesize = (ibuf->x * 3 + extrabytes) * ibuf->y;
data = (uchar *) ibuf->rect;
ofile = fdopen(outfile,"ab");
putShortLSB(19778,ofile); /* "BM" */
putIntLSB(0,ofile); /* This can be 0 for BI_RGB bitmaps */
putShortLSB(0,ofile); /* Res1 */
putShortLSB(0,ofile); /* Res2 */
putIntLSB(BMP_FILEHEADER_SIZE + sizeof(infoheader),ofile);
putIntLSB(sizeof(infoheader),ofile);
putIntLSB(ibuf->x,ofile);
putIntLSB(ibuf->y,ofile);
putShortLSB(1,ofile);
putShortLSB(24,ofile);
putIntLSB(0,ofile);
putIntLSB(bytesize + BMP_FILEHEADER_SIZE + sizeof(infoheader),ofile);
putIntLSB(0,ofile);
putIntLSB(0,ofile);
putIntLSB(0,ofile);
putIntLSB(0,ofile);
/* Need to write out padded image data in bgr format */
for (y=0;y<ibuf->y;y++) {
for (x=0;x<ibuf->x;x++) {
ptr=(x + y * ibuf->x) * 4;
if (putc(data[ptr+2],ofile) == EOF) return 0;
if (putc(data[ptr+1],ofile) == EOF) return 0;
if (putc(data[ptr],ofile) == EOF) return 0;
}
/* add padding here */
for (t=0;t<extrabytes;t++) if (putc(0,ofile) == EOF) return 0;
}
return 1;
}
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