249 lines
6.2 KiB
C
249 lines
6.2 KiB
C
/**
|
|
* $Id$
|
|
*
|
|
* ***** 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 *****
|
|
*/
|
|
|
|
#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"
|
|
|
|
/* 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 = y; i > 0; i--) {
|
|
int j;
|
|
for (j = x ; j > 0; j--) {
|
|
rect[0] = bmp[2];
|
|
rect[1] = bmp[1];
|
|
rect[2] = bmp[0];
|
|
|
|
rect[3] = 255;
|
|
rect += 4; bmp += 3;
|
|
}
|
|
/* for 24-bit images, rows are padded to multiples of 4 */
|
|
bmp += x % 4;
|
|
}
|
|
} 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 */
|
|
static 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);
|
|
}
|
|
|
|
static 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, char *name, 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 = fopen(name,"wb");
|
|
if (!ofile) return 0;
|
|
|
|
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;
|
|
}
|
|
if (ofile) {
|
|
fflush(ofile);
|
|
fclose(ofile);
|
|
}
|
|
return 1;
|
|
}
|