Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

971 lines (788 sloc) 23.231 kb
#include "imageri.h"
#include "log.h"
#include "iolayer.h"
#include <stdlib.h>
#include <errno.h>
/*
=head1 NAME
tga.c - implements reading and writing targa files, uses io layer.
=head1 SYNOPSIS
io_glue *ig = io_new_fd( fd );
i_img *im = i_readtga_wiol(ig, -1); // no limit on how much is read
// or
io_glue *ig = io_new_fd( fd );
return_code = i_writetga_wiol(im, ig);
=head1 DESCRIPTION
tga.c implements the basic functions to read and write portable targa
files. It uses the iolayer and needs either a seekable source or an
entire memory mapped buffer.
=head1 FUNCTION REFERENCE
Some of these functions are internal.
=over
=cut
*/
typedef struct {
unsigned char idlength;
char colourmaptype;
char datatypecode;
short int colourmaporigin;
short int colourmaplength;
char colourmapdepth;
short int x_origin;
short int y_origin;
int width;
int height;
char bitsperpixel;
char imagedescriptor;
} tga_header;
typedef enum { NoInit, Raw, Rle } rle_state;
typedef struct {
int compressed;
size_t bytepp;
rle_state state;
unsigned char cval[4];
int len;
unsigned char hdr;
io_glue *ig;
} tga_source;
typedef struct {
int compressed;
int bytepp;
io_glue *ig;
} tga_dest;
#define TGA_MAX_DIM 0xFFFF
/*
=item bpp_to_bytes(bpp)
Convert bits per pixel into bytes per pixel
bpp - bits per pixel
=cut
*/
static
size_t
bpp_to_bytes(unsigned int bpp) {
switch (bpp) {
case 8:
return 1;
case 15:
case 16:
return 2;
case 24:
return 3;
case 32:
return 4;
}
return 0;
}
/*
=item bpp_to_channels(bpp)
Convert bits per pixel and the number of attribute bits into channels
in the image
bpp - bits per pixel
attr_bit_count - number of attribute bits
=cut
*/
static
int
bpp_to_channels(unsigned int bpp, int attr_bit_count) {
switch (bpp) {
case 8:
return 1;
case 16:
if (attr_bit_count == 1)
return 4;
case 15:
return 3;
case 32:
if (attr_bit_count == 8)
return 4;
case 24:
return 3;
}
return 0;
}
/*
* Packing functions - used for (un)packing
* datastructures into raw bytes.
*/
/*
=item color_unpack(buf, bytepp, val)
Unpacks bytes into colour structures, for 2 byte type the first byte
coming from the file will actually be GGGBBBBB, and the second will be
ARRRRRGG. "A" represents an attribute bit. The 3 byte entry contains
1 byte each of blue, green, and red. The 4 byte entry contains 1 byte
each of blue, green, red, and attribute.
buf - pointer to data
bytepp - bytes per pixel
val - pointer to color to store to
=cut
*/
static
void
color_unpack(unsigned char *buf, int bytepp, i_color *val) {
switch (bytepp) {
case 1:
val->gray.gray_color = buf[0];
break;
case 2:
val->rgba.r = (buf[1] & 0x7c) << 1;
val->rgba.g = ((buf[1] & 0x03) << 6) | ((buf[0] & 0xe0) >> 2);
val->rgba.b = (buf[0] & 0x1f) << 3;
val->rgba.a = (buf[1] & 0x80) ? 0 : 255;
val->rgba.r |= val->rgba.r >> 5;
val->rgba.g |= val->rgba.g >> 5;
val->rgba.b |= val->rgba.b >> 5;
break;
case 3:
val->rgb.b = buf[0];
val->rgb.g = buf[1];
val->rgb.r = buf[2];
break;
case 4:
val->rgba.b = buf[0];
val->rgba.g = buf[1];
val->rgba.r = buf[2];
val->rgba.a = buf[3];
break;
}
}
/*
=item color_pack
Packs a colour into an array of bytes, for 2 byte type the first byte
will be GGGBBBBB, and the second will be ARRRRRGG. "A" represents an
attribute bit. The 3 byte entry contains 1 byte each of blue, green,
and red. The 4 byte entry contains 1 byte each of blue, green, red,
and attribute.
buf - destination buffer
bitspp - bits per pixel
val - color to pack
=cut
*/
static
void
color_pack(unsigned char *buf, int bitspp, i_color *val) {
switch (bitspp) {
case 8:
buf[0] = val->gray.gray_color;
break;
case 16:
buf[0] = (val->rgba.b >> 3);
buf[0] |= (val->rgba.g & 0x38) << 2;
buf[1] = (val->rgba.r & 0xf8)>> 1;
buf[1] |= (val->rgba.g >> 6);
buf[1] |= val->rgba.a > 0x7f ? 0 : 0x80;
break;
case 15:
buf[0] = (val->rgba.b >> 3);
buf[0] |= (val->rgba.g & 0x38) << 2;
buf[1] = (val->rgba.r & 0xf8)>> 1;
buf[1] |= (val->rgba.g >> 6);
break;
case 24:
buf[0] = val->rgb.b;
buf[1] = val->rgb.g;
buf[2] = val->rgb.r;
break;
case 32:
buf[0] = val->rgba.b;
buf[1] = val->rgba.g;
buf[2] = val->rgba.r;
buf[3] = val->rgba.a;
break;
}
}
/*
=item find_repeat
Helper function for rle compressor to find the next triple repeat of the
same pixel value in buffer.
buf - buffer
length - number of pixel values in buffer
bytepp - number of bytes in a pixel value
=cut
*/
static
int
find_repeat(unsigned char *buf, int length, int bytepp) {
int i = 0;
while(i<length-1) {
if(memcmp(buf+i*bytepp, buf+(i+1)*bytepp, bytepp) == 0) {
if (i == length-2) return -1;
if (memcmp(buf+(i+1)*bytepp, buf+(i+2)*bytepp,bytepp) == 0)
return i;
else i++;
}
i++;
}
return -1;
}
/*
=item find_span
Helper function for rle compressor to find the length of a span where
the same pixel value is in the buffer.
buf - buffer
length - number of pixel values in buffer
bytepp - number of bytes in a pixel value
=cut
*/
static
int
find_span(unsigned char *buf, int length, int bytepp) {
int i = 0;
while(i<length) {
if(memcmp(buf, buf+(i*bytepp), bytepp) != 0) return i;
i++;
}
return length;
}
/*
=item tga_header_unpack(header, headbuf)
Unpacks the header structure into from buffer and stores
in the header structure.
header - header structure
headbuf - buffer to unpack from
=cut
*/
static
void
tga_header_unpack(tga_header *header, unsigned char headbuf[18]) {
header->idlength = headbuf[0];
header->colourmaptype = headbuf[1];
header->datatypecode = headbuf[2];
header->colourmaporigin = (headbuf[4] << 8) + headbuf[3];
header->colourmaplength = (headbuf[6] << 8) + headbuf[5];
header->colourmapdepth = headbuf[7];
header->x_origin = (headbuf[9] << 8) + headbuf[8];
header->y_origin = (headbuf[11] << 8) + headbuf[10];
header->width = (headbuf[13] << 8) + headbuf[12];
header->height = (headbuf[15] << 8) + headbuf[14];
header->bitsperpixel = headbuf[16];
header->imagedescriptor = headbuf[17];
}
/* this function should never produce diagnostics to stdout, maybe to the logfile */
int
tga_header_verify(unsigned char headbuf[18]) {
tga_header header;
tga_header_unpack(&header, headbuf);
switch (header.datatypecode) {
default:
/*printf("bad typecode!\n");*/
return 0;
case 1: /* Uncompressed, color-mapped images */
case 3: /* Uncompressed, grayscale images */
case 9: /* Compressed, color-mapped images */
case 11: /* Compressed, grayscale images */
if (header.bitsperpixel != 8)
return 0;
break;
case 0:
case 2: /* Uncompressed, rgb images */
case 10: /* Compressed, rgb images */
if (header.bitsperpixel != 15 && header.bitsperpixel != 16
&& header.bitsperpixel != 24 && header.bitsperpixel != 32)
return 0;
break;
}
switch (header.colourmaptype) {
default:
/*printf("bad colourmaptype!\n");*/
return 0;
case 1:
if (header.datatypecode != 1 && header.datatypecode != 9)
return 0; /* only get a color map on a color mapped image */
case 0:
break;
}
switch (header.colourmapdepth) {
default:
return 0;
case 0: /* can be 0 if no colour map */
case 15:
case 16:
case 24:
case 32:
break;
}
return 1;
}
/*
=item tga_header_pack(header, headbuf)
Packs header structure into buffer for writing.
header - header structure
headbuf - buffer to pack into
=cut
*/
static
void
tga_header_pack(tga_header *header, unsigned char headbuf[18]) {
headbuf[0] = header->idlength;
headbuf[1] = header->colourmaptype;
headbuf[2] = header->datatypecode;
headbuf[3] = header->colourmaporigin & 0xff;
headbuf[4] = header->colourmaporigin >> 8;
headbuf[5] = header->colourmaplength & 0xff;
headbuf[6] = header->colourmaplength >> 8;
headbuf[7] = header->colourmapdepth;
headbuf[8] = header->x_origin & 0xff;
headbuf[9] = header->x_origin >> 8;
headbuf[10] = header->y_origin & 0xff;
headbuf[11] = header->y_origin >> 8;
headbuf[12] = header->width & 0xff;
headbuf[13] = header->width >> 8;
headbuf[14] = header->height & 0xff;
headbuf[15] = header->height >> 8;
headbuf[16] = header->bitsperpixel;
headbuf[17] = header->imagedescriptor;
}
/*
=item tga_source_read(s, buf, pixels)
Reads pixel number of pixels from source s into buffer buf. Takes
care of decompressing the stream if needed.
s - data source
buf - destination buffer
pixels - number of pixels to put into buffer
=cut
*/
static
int
tga_source_read(tga_source *s, unsigned char *buf, size_t pixels) {
int cp = 0, j, k;
if (!s->compressed) {
if (i_io_read(s->ig, buf, pixels*s->bytepp) != pixels*s->bytepp) return 0;
return 1;
}
while(cp < pixels) {
int ml;
if (s->len == 0) s->state = NoInit;
switch (s->state) {
case NoInit:
if (i_io_read(s->ig, &s->hdr, 1) != 1) return 0;
s->len = (s->hdr &~(1<<7))+1;
s->state = (s->hdr & (1<<7)) ? Rle : Raw;
{
/*
static cnt = 0;
printf("%04d %s: %d\n", cnt++, s->state==Rle?"RLE":"RAW", s->len);
*/
}
if (s->state == Rle && i_io_read(s->ig, s->cval, s->bytepp) != s->bytepp) return 0;
break;
case Rle:
ml = i_min(s->len, pixels-cp);
for(k=0; k<ml; k++) for(j=0; j<s->bytepp; j++)
buf[(cp+k)*s->bytepp+j] = s->cval[j];
cp += ml;
s->len -= ml;
break;
case Raw:
ml = i_min(s->len, pixels-cp);
if (i_io_read(s->ig, buf+cp*s->bytepp, ml*s->bytepp) != ml*s->bytepp) return 0;
cp += ml;
s->len -= ml;
break;
}
}
return 1;
}
/*
=item tga_dest_write(s, buf, pixels)
Writes pixels from buf to destination s. Takes care of compressing if the
destination is compressed.
s - data destination
buf - source buffer
pixels - number of pixels to put write to destination
=cut
*/
static
int
tga_dest_write(tga_dest *s, unsigned char *buf, size_t pixels) {
int cp = 0;
if (!s->compressed) {
if (i_io_write(s->ig, buf, pixels*s->bytepp) != pixels*s->bytepp) return 0;
return 1;
}
while(cp < pixels) {
int tlen;
int nxtrip = find_repeat(buf+cp*s->bytepp, pixels-cp, s->bytepp);
tlen = (nxtrip == -1) ? pixels-cp : nxtrip;
while(tlen) {
unsigned char clen = (tlen>128) ? 128 : tlen;
clen--;
if (i_io_write(s->ig, &clen, 1) != 1) return 0;
clen++;
if (i_io_write(s->ig, buf+cp*s->bytepp, clen*s->bytepp) != clen*s->bytepp) return 0;
tlen -= clen;
cp += clen;
}
if (cp >= pixels) break;
tlen = find_span(buf+cp*s->bytepp, pixels-cp, s->bytepp);
if (tlen <3) continue;
while (tlen) {
unsigned char clen = (tlen>128) ? 128 : tlen;
clen = (clen - 1) | 0x80;
if (i_io_write(s->ig, &clen, 1) != 1) return 0;
clen = (clen & ~0x80) + 1;
if (i_io_write(s->ig, buf+cp*s->bytepp, s->bytepp) != s->bytepp) return 0;
tlen -= clen;
cp += clen;
}
}
return 1;
}
/*
=item tga_palette_read(ig, img, bytepp, colourmaplength)
Reads the colormap from a tga file and stores in the paletted image
structure.
ig - iolayer data source
img - image structure
bytepp - bytes per pixel
colourmaplength - number of colours in colourmap
=cut
*/
static
int
tga_palette_read(io_glue *ig, i_img *img, int bytepp, int colourmaplength) {
int i;
size_t palbsize;
unsigned char *palbuf;
i_color val;
palbsize = colourmaplength*bytepp;
palbuf = mymalloc(palbsize);
if (i_io_read(ig, palbuf, palbsize) != palbsize) {
i_push_error(errno, "could not read targa colourmap");
return 0;
}
/* populate the palette of the new image */
for(i=0; i<colourmaplength; i++) {
color_unpack(palbuf+i*bytepp, bytepp, &val);
i_addcolors(img, &val, 1);
}
myfree(palbuf);
return 1;
}
/*
=item tga_palette_write(ig, img, bitspp, colourmaplength)
Stores the colormap of an image in the destination ig.
ig - iolayer data source
img - image structure
bitspp - bits per pixel in colourmap
colourmaplength - number of colours in colourmap
=cut
*/
static
int
tga_palette_write(io_glue *ig, i_img *img, int bitspp, int colourmaplength) {
int i;
size_t bytepp = bpp_to_bytes(bitspp);
size_t palbsize = i_colorcount(img)*bytepp;
unsigned char *palbuf = mymalloc(palbsize);
for(i=0; i<colourmaplength; i++) {
i_color val;
i_getcolors(img, i, &val, 1);
color_pack(palbuf+i*bytepp, bitspp, &val);
}
if (i_io_write(ig, palbuf, palbsize) != palbsize) {
i_push_error(errno, "could not write targa colourmap");
return 0;
}
myfree(palbuf);
return 1;
}
/*
=item i_readtga_wiol(ig, length)
Read in an image from the iolayer data source and return the image structure to it.
Returns NULL on error.
ig - io_glue object
length - maximum length to read from data source, before closing it -1
signifies no limit.
=cut
*/
i_img *
i_readtga_wiol(io_glue *ig, int length) {
i_img* img = NULL;
int x, y;
int width, height, channels;
int mapped;
char *idstring = NULL;
tga_source src;
tga_header header;
unsigned char headbuf[18];
unsigned char *databuf;
i_color *linebuf = NULL;
i_clear_error();
mm_log((1,"i_readtga(ig %p, length %d)\n", ig, length));
if (i_io_read(ig, &headbuf, 18) != 18) {
i_push_error(errno, "could not read targa header");
return NULL;
}
tga_header_unpack(&header, headbuf);
mm_log((1,"Id length: %d\n",header.idlength));
mm_log((1,"Colour map type: %d\n",header.colourmaptype));
mm_log((1,"Image type: %d\n",header.datatypecode));
mm_log((1,"Colour map offset: %d\n",header.colourmaporigin));
mm_log((1,"Colour map length: %d\n",header.colourmaplength));
mm_log((1,"Colour map depth: %d\n",header.colourmapdepth));
mm_log((1,"X origin: %d\n",header.x_origin));
mm_log((1,"Y origin: %d\n",header.y_origin));
mm_log((1,"Width: %d\n",header.width));
mm_log((1,"Height: %d\n",header.height));
mm_log((1,"Bits per pixel: %d\n",header.bitsperpixel));
mm_log((1,"Descriptor: %d\n",header.imagedescriptor));
if (header.idlength) {
/* max of 256, so this is safe */
idstring = mymalloc(header.idlength+1);
if (i_io_read(ig, idstring, header.idlength) != header.idlength) {
i_push_error(errno, "short read on targa idstring");
return NULL;
}
}
width = header.width;
height = header.height;
/* Set tags here */
switch (header.datatypecode) {
case 0: /* No data in image */
i_push_error(0, "Targa image contains no image data");
if (idstring) myfree(idstring);
return NULL;
break;
case 1: /* Uncompressed, color-mapped images */
case 9: /* Compressed, color-mapped images */
case 3: /* Uncompressed, grayscale images */
case 11: /* Compressed, grayscale images */
if (header.bitsperpixel != 8) {
i_push_error(0, "Targa: mapped/grayscale image's bpp is not 8, unsupported.");
if (idstring) myfree(idstring);
return NULL;
}
src.bytepp = 1;
break;
case 2: /* Uncompressed, rgb images */
case 10: /* Compressed, rgb images */
if ((src.bytepp = bpp_to_bytes(header.bitsperpixel)))
break;
i_push_error(0, "Targa: direct color image's bpp is not 15/16/24/32 - unsupported.");
if (idstring) myfree(idstring);
return NULL;
break;
case 32: /* Compressed color-mapped, Huffman, Delta and runlength */
case 33: /* Compressed color-mapped, Huffman, Delta and runlength */
i_push_error(0, "Unsupported Targa (Huffman/delta/rle/quadtree) subformat is not supported");
if (idstring) myfree(idstring);
return NULL;
break;
default: /* All others which we don't know which might be */
i_push_error(0, "Unknown targa format");
if (idstring) myfree(idstring);
return NULL;
break;
}
src.state = NoInit;
src.len = 0;
src.ig = ig;
src.compressed = !!(header.datatypecode & (1<<3));
/* Determine number of channels */
mapped = 1;
switch (header.datatypecode) {
case 2: /* Uncompressed, rgb images */
case 10: /* Compressed, rgb images */
mapped = 0;
case 1: /* Uncompressed, color-mapped images */
case 9: /* Compressed, color-mapped images */
if ((channels = bpp_to_channels(mapped ?
header.colourmapdepth :
header.bitsperpixel,
header.imagedescriptor & 0xF))) break;
i_push_error(0, "Targa Image has none of 15/16/24/32 pixel layout");
if (idstring) myfree(idstring);
return NULL;
break;
case 3: /* Uncompressed, grayscale images */
case 11: /* Compressed, grayscale images */
mapped = 0;
channels = 1;
break;
default:
i_push_error(0, "invalid or unsupported datatype code");
return NULL;
}
if (!i_int_check_image_file_limits(width, height, channels,
sizeof(i_sample_t))) {
mm_log((1, "i_readtga_wiol: image size exceeds limits\n"));
return NULL;
}
img = mapped ?
i_img_pal_new(width, height, channels, 256) :
i_img_empty_ch(NULL, width, height, channels);
if (!img) {
if (idstring)
myfree(idstring);
return NULL;
}
if (idstring) {
i_tags_add(&img->tags, "tga_idstring", 0, idstring, header.idlength, 0);
myfree(idstring);
}
if (mapped &&
!tga_palette_read(ig,
img,
bpp_to_bytes(header.colourmapdepth),
header.colourmaplength)
) {
i_push_error(0, "Targa Image has none of 15/16/24/32 pixel layout");
if (idstring) myfree(idstring);
if (img) i_img_destroy(img);
return NULL;
}
/* Allocate buffers */
/* width is max 0xffff, src.bytepp is max 4, so this is safe */
databuf = mymalloc(width*src.bytepp);
/* similarly here */
if (!mapped) linebuf = mymalloc(width*sizeof(i_color));
for(y=0; y<height; y++) {
if (!tga_source_read(&src, databuf, width)) {
i_push_error(errno, "read for targa data failed");
if (linebuf) myfree(linebuf);
myfree(databuf);
if (img) i_img_destroy(img);
return NULL;
}
if (mapped && header.colourmaporigin) for(x=0; x<width; x++) databuf[x] -= header.colourmaporigin;
if (mapped) i_ppal(img, 0, width, header.imagedescriptor & (1<<5) ? y : height-1-y, databuf);
else {
for(x=0; x<width; x++) color_unpack(databuf+x*src.bytepp, src.bytepp, linebuf+x);
i_plin(img, 0, width, header.imagedescriptor & (1<<5) ? y : height-1-y, linebuf);
}
}
myfree(databuf);
if (linebuf) myfree(linebuf);
i_tags_add(&img->tags, "i_format", 0, "tga", -1, 0);
i_tags_addn(&img->tags, "tga_bitspp", 0, mapped?header.colourmapdepth:header.bitsperpixel);
if (src.compressed) i_tags_addn(&img->tags, "compressed", 0, 1);
return img;
}
/*
=item i_writetga_wiol(img, ig)
Writes an image in targa format. Returns 0 on error.
img - image to store
ig - io_glue object
=cut
*/
undef_int
i_writetga_wiol(i_img *img, io_glue *ig, int wierdpack, int compress, char *idstring, size_t idlen) {
tga_header header;
tga_dest dest;
unsigned char headbuf[18];
unsigned int bitspp;
unsigned int attr_bits = 0;
int mapped;
/* parameters */
/*
int compress = 1;
char *idstring = "testing";
int wierdpack = 0;
*/
idlen = strlen(idstring);
mapped = img->type == i_palette_type;
mm_log((1,"i_writetga_wiol(img %p, ig %p, idstring %p, idlen %ld, wierdpack %d, compress %d)\n",
img, ig, idstring, (long)idlen, wierdpack, compress));
mm_log((1, "virtual %d, paletted %d\n", img->virtual, mapped));
mm_log((1, "channels %d\n", img->channels));
i_clear_error();
if (img->xsize > TGA_MAX_DIM || img->ysize > TGA_MAX_DIM) {
i_push_error(0, "image too large for TGA");
return 0;
}
switch (img->channels) {
case 1:
bitspp = 8;
if (wierdpack) {
mm_log((1,"wierdpack option ignored for 1 channel images\n"));
wierdpack=0;
}
break;
case 2:
i_push_error(0, "Cannot store 2 channel image in targa format");
return 0;
break;
case 3:
bitspp = wierdpack ? 15 : 24;
break;
case 4:
bitspp = wierdpack ? 16 : 32;
attr_bits = wierdpack ? 1 : 8;
break;
default:
i_push_error(0, "Targa only handles 1,3 and 4 channel images.");
return 0;
}
header.idlength = idlen;
header.colourmaptype = mapped ? 1 : 0;
header.datatypecode = mapped ? 1 : img->channels == 1 ? 3 : 2;
header.datatypecode += compress ? 8 : 0;
mm_log((1, "datatypecode %d\n", header.datatypecode));
header.colourmaporigin = 0;
header.colourmaplength = mapped ? i_colorcount(img) : 0;
header.colourmapdepth = mapped ? bitspp : 0;
header.x_origin = 0;
header.y_origin = 0;
header.width = img->xsize;
header.height = img->ysize;
header.bitsperpixel = mapped ? 8 : bitspp;
header.imagedescriptor = (1<<5) | attr_bits; /* normal order instead of upside down */
tga_header_pack(&header, headbuf);
if (i_io_write(ig, &headbuf, sizeof(headbuf)) != sizeof(headbuf)) {
i_push_error(errno, "could not write targa header");
return 0;
}
if (idlen) {
if (i_io_write(ig, idstring, idlen) != idlen) {
i_push_error(errno, "could not write targa idstring");
return 0;
}
}
/* Make this into a constructor? */
dest.compressed = compress;
dest.bytepp = mapped ? 1 : bpp_to_bytes(bitspp);
dest.ig = ig;
mm_log((1, "dest.compressed = %d\n", dest.compressed));
mm_log((1, "dest.bytepp = %d\n", dest.bytepp));
if (img->type == i_palette_type) {
if (!tga_palette_write(ig, img, bitspp, i_colorcount(img))) return 0;
if (!img->virtual && !dest.compressed) {
if (i_io_write(ig, img->idata, img->bytes) != img->bytes) {
i_push_error(errno, "could not write targa image data");
return 0;
}
} else {
int y;
i_palidx *vals = mymalloc(sizeof(i_palidx)*img->xsize);
for(y=0; y<img->ysize; y++) {
i_gpal(img, 0, img->xsize, y, vals);
tga_dest_write(&dest, vals, img->xsize);
}
myfree(vals);
}
} else { /* direct type */
int x, y;
size_t bytepp = wierdpack ? 2 : bpp_to_bytes(bitspp);
size_t lsize = bytepp * img->xsize;
i_color *vals = mymalloc(img->xsize*sizeof(i_color));
unsigned char *buf = mymalloc(lsize);
for(y=0; y<img->ysize; y++) {
i_glin(img, 0, img->xsize, y, vals);
for(x=0; x<img->xsize; x++) color_pack(buf+x*bytepp, bitspp, vals+x);
tga_dest_write(&dest, buf, img->xsize);
}
myfree(buf);
myfree(vals);
}
if (i_io_close(ig))
return 0;
return 1;
}
/*
=back
=head1 AUTHOR
Arnar M. Hrafnkelsson <addi@umich.edu>
=head1 SEE ALSO
Imager(3)
=cut
*/
Jump to Line
Something went wrong with that request. Please try again.