From 17407a1cd482d087e2fa3b239353b3928cf59a15 Mon Sep 17 00:00:00 2001
From: "Mirar (Pontus Hagland)" <pike@sort.mirar.org>
Date: Sun, 11 Apr 1999 14:55:43 +0200
Subject: [PATCH] bmp decode added (and some helper functions)
Rev: src/modules/Image/colortable.c:1.61
Rev: src/modules/Image/colortable.h:1.17
Rev: src/modules/Image/encodings/bmp.c:1.2
---
src/modules/Image/colortable.c | 81 ++++++-
src/modules/Image/colortable.h | 6 +-
src/modules/Image/encodings/bmp.c | 354 +++++++++++++++++++++++++++---
3 files changed, 401 insertions(+), 40 deletions(-)
diff --git a/src/modules/Image/colortable.c b/src/modules/Image/colortable.c
index 6f97a095ac..cf0d976eef 100644
--- a/src/modules/Image/colortable.c
+++ b/src/modules/Image/colortable.c
@@ -1,12 +1,12 @@
#include "global.h"
#include <config.h>
-/* $Id: colortable.c,v 1.60 1999/04/10 05:18:18 mirar Exp $ */
+/* $Id: colortable.c,v 1.61 1999/04/11 12:55:40 mirar Exp $ */
/*
**! module Image
**! note
-**! $Id: colortable.c,v 1.60 1999/04/10 05:18:18 mirar Exp $
+**! $Id: colortable.c,v 1.61 1999/04/11 12:55:40 mirar Exp $
**! class colortable
**!
**! This object keeps colortable information,
@@ -21,7 +21,7 @@
#undef COLORTABLE_DEBUG
#undef COLORTABLE_REDUCE_DEBUG
-RCSID("$Id: colortable.c,v 1.60 1999/04/10 05:18:18 mirar Exp $");
+RCSID("$Id: colortable.c,v 1.61 1999/04/11 12:55:40 mirar Exp $");
#include <math.h> /* fabs() */
@@ -929,6 +929,54 @@ static struct nct_flat _img_get_flat_from_string(struct pike_string *str)
return flat;
}
+static struct nct_flat _img_get_flat_from_bgr_string(struct pike_string *str)
+{
+ struct nct_flat flat;
+ int i;
+
+ flat.numentries=str->len/3;
+ if (flat.numentries<1)
+ error("Can't make a colortable with less then one (1) color.\n");
+
+ flat.entries=(struct nct_flat_entry*)
+ xalloc(flat.numentries*sizeof(struct nct_flat_entry));
+
+ for (i=0; i<flat.numentries; i++)
+ {
+ flat.entries[i].color.r=str->str[i*3+2];
+ flat.entries[i].color.g=str->str[i*3+1];
+ flat.entries[i].color.b=str->str[i*3];
+ flat.entries[i].weight=1;
+ flat.entries[i].no=i;
+ }
+
+ return flat;
+}
+
+static struct nct_flat _img_get_flat_from_bgrz_string(struct pike_string *str)
+{
+ struct nct_flat flat;
+ int i;
+
+ flat.numentries=str->len/4;
+ if (flat.numentries<1)
+ error("Can't make a colortable with less then one (1) color.\n");
+
+ flat.entries=(struct nct_flat_entry*)
+ xalloc(flat.numentries*sizeof(struct nct_flat_entry));
+
+ for (i=0; i<flat.numentries; i++)
+ {
+ flat.entries[i].color.r=str->str[i*4+2];
+ flat.entries[i].color.g=str->str[i*4+1];
+ flat.entries[i].color.b=str->str[i*4];
+ flat.entries[i].weight=1;
+ flat.entries[i].no=i;
+ }
+
+ return flat;
+}
+
static INLINE void _find_cube_dist(struct nct_cube cube,rgb_group rgb,
int *dist,int *no,
rgbl_group sf)
@@ -2150,7 +2198,28 @@ static void image_colortable_add(INT32 args)
}
else if (sp[-args].type==T_STRING)
{
- THIS->u.flat=_img_get_flat_from_string(sp[-args].u.string);
+ if (args>1)
+ {
+ if (sp[1-args].type!=T_INT)
+ SIMPLE_BAD_ARG_ERROR("Image.colortable",2,"int");
+ switch (sp[1-args].u.integer)
+ {
+ case 0: /* rgb */
+ THIS->u.flat=_img_get_flat_from_string(sp[-args].u.string);
+ break;
+ case 1: /* bgr */
+ THIS->u.flat=_img_get_flat_from_bgr_string(sp[-args].u.string);
+ break;
+ case 2: /* bgrz */
+ THIS->u.flat=
+ _img_get_flat_from_bgrz_string(sp[-args].u.string);
+ break;
+ default:
+ SIMPLE_BAD_ARG_ERROR("Image.colortable",2,"int(0..2)");
+ }
+ }
+ else
+ THIS->u.flat=_img_get_flat_from_string(sp[-args].u.string);
THIS->type=NCT_FLAT;
}
else if (sp[-args].type==T_INT)
@@ -2432,7 +2501,7 @@ void image_colortable_write_rgb(struct neo_colortable *nct,
free(flat.entries);
}
-void image_colortable_write_rgba(struct neo_colortable *nct,
+void image_colortable_write_rgbz(struct neo_colortable *nct,
unsigned char *dest)
{
struct nct_flat flat;
@@ -2460,7 +2529,7 @@ void image_colortable_write_rgba(struct neo_colortable *nct,
free(flat.entries);
}
-void image_colortable_write_bgra(struct neo_colortable *nct,
+void image_colortable_write_bgrz(struct neo_colortable *nct,
unsigned char *dest)
{
struct nct_flat flat;
diff --git a/src/modules/Image/colortable.h b/src/modules/Image/colortable.h
index 9d52ebd730..4d95e7e4e4 100644
--- a/src/modules/Image/colortable.h
+++ b/src/modules/Image/colortable.h
@@ -1,7 +1,7 @@
/*
**! module Image
**! note
-**! $Id: colortable.h,v 1.16 1999/04/10 02:02:05 mirar Exp $
+**! $Id: colortable.h,v 1.17 1999/04/11 12:55:43 mirar Exp $
*/
#ifdef PIKE_IMAGE_COLORTABLE_H
@@ -195,10 +195,10 @@ int image_colortable_size(struct neo_colortable *nct);
void image_colortable_write_rgb(struct neo_colortable *nct,
unsigned char *dest);
-void image_colortable_write_rgba(struct neo_colortable *nct,
+void image_colortable_write_rgbz(struct neo_colortable *nct,
unsigned char *dest);
-void image_colortable_write_bgra(struct neo_colortable *nct,
+void image_colortable_write_bgrz(struct neo_colortable *nct,
unsigned char *dest);
int image_colortable_initiate_dither(struct neo_colortable *nct,
diff --git a/src/modules/Image/encodings/bmp.c b/src/modules/Image/encodings/bmp.c
index f6fa096705..cb494b1b3e 100644
--- a/src/modules/Image/encodings/bmp.c
+++ b/src/modules/Image/encodings/bmp.c
@@ -1,9 +1,9 @@
-/* $Id: bmp.c,v 1.1 1999/03/22 14:35:25 mirar Exp $ */
+/* $Id: bmp.c,v 1.2 1999/04/11 12:55:13 mirar Exp $ */
/*
**! module Image
**! note
-**! $Id: bmp.c,v 1.1 1999/03/22 14:35:25 mirar Exp $
+**! $Id: bmp.c,v 1.2 1999/04/11 12:55:13 mirar Exp $
**! submodule BMP
**!
**! This submodule keeps the BMP (Windows Bitmap)
@@ -30,7 +30,7 @@
#include <ctype.h>
#include "stralloc.h"
-RCSID("$Id: bmp.c,v 1.1 1999/03/22 14:35:25 mirar Exp $");
+RCSID("$Id: bmp.c,v 1.2 1999/04/11 12:55:13 mirar Exp $");
#include "pike_macros.h"
#include "object.h"
#include "constants.h"
@@ -38,6 +38,7 @@ RCSID("$Id: bmp.c,v 1.1 1999/03/22 14:35:25 mirar Exp $");
#include "svalue.h"
#include "threads.h"
#include "array.h"
+#include "mapping.h"
#include "error.h"
@@ -94,7 +95,7 @@ static INLINE unsigned long _int_from_16bit(unsigned char *data)
**! arg object colortable
**! Colortable object.
**!
-** see also: decode
+**! see also: decode
**!
**! returns the encoded image as a string
**!
@@ -104,19 +105,19 @@ static INLINE unsigned long _int_from_16bit(unsigned char *data)
void img_bmp_encode(INT32 args)
{
- struct object *o,*oc;
- struct image *img;
- struct neo_colortable *nct;
- int n=0,bpp;
+ struct object *o=NULL,*oc=NULL;
+ struct image *img=NULL;
+ struct neo_colortable *nct=NULL;
+ int n=0,bpp=0;
int size,offs;
struct pike_string *ps;
if (!args)
- error("Image.BMP.encode: Illegal number of arguments\n");
+ SIMPLE_TOO_FEW_ARGS_ERROR("Image.BMP.encode",1);
if (sp[-args].type!=T_OBJECT ||
!(img=(struct image*)get_storage(o=sp[-args].u.object,image_program)))
- error("Image.BMP.encode: Illegal argument 1, expected image object\n");
+ SIMPLE_BAD_ARG_ERROR("Image.BMP.encode",1,"image object");
if (args==1)
nct=NULL,oc=NULL;
@@ -124,16 +125,14 @@ void img_bmp_encode(INT32 args)
if (sp[-args].type!=T_OBJECT ||
!(nct=(struct neo_colortable*)
get_storage(oc=sp[1-args].u.object,image_colortable_program)))
- error("Image.BMP.encode: Illegal argument 2, "
- "expected colortable object\n");
+ SIMPLE_BAD_ARG_ERROR("Image.BMP.encode",2,"colortable object");
if (!nct)
bpp=24;
else if (image_colortable_size(nct)<=256)
bpp=8; /* only supports this for now */
else
- error("Image.BMP.encode: Illegal argument 2, "
- "can only handle less or equal then 256 colors\n");
+ SIMPLE_BAD_ARG_ERROR("Image.BMP.encode",2,"colortable object with max 256 colors");
if (oc) oc->refs++;
o->refs++;
@@ -171,7 +170,7 @@ void img_bmp_encode(INT32 args)
{
ps=begin_shared_string((1<<bpp)*4);
MEMSET(ps->str,0,(1<<bpp)*4);
- image_colortable_write_bgra(nct,(unsigned char *)ps->str);
+ image_colortable_write_bgrz(nct,(unsigned char *)ps->str);
push_string(end_shared_string(ps));
n++;
}
@@ -183,6 +182,7 @@ void img_bmp_encode(INT32 args)
if (nct)
{
+ /* 8bpp image */
ps=begin_shared_string(img->xsize*img->ysize);
image_colortable_index_8bit_image(nct,img->img,(unsigned char *)ps->str,
img->xsize*img->ysize,img->xsize);
@@ -191,24 +191,18 @@ void img_bmp_encode(INT32 args)
}
else
{
- if (sizeof(rgb_group)==3)
- push_string(make_shared_binary_string((char*)img->img,
- img->xsize*img->ysize*3));
- else
+ unsigned char *c;
+ int n=img->xsize*img->ysize;
+ rgb_group *s=img->img;
+ c=(unsigned char*)((ps=begin_shared_string(n*3))->str);
+ while (n--)
{
- unsigned char *c;
- int n=img->xsize*img->ysize;
- rgb_group *s=img->img;
- c=(unsigned char*)((ps=begin_shared_string(n*3))->str);
- while (n--)
- {
- *(c++)=s->r;
- *(c++)=s->g;
- *(c++)=s->b;
- s++;
- }
- push_string(end_shared_string(ps));
+ *(c++)=s->b;
+ *(c++)=s->g;
+ *(c++)=s->r;
+ s++;
}
+ push_string(end_shared_string(ps));
n++;
}
@@ -239,6 +233,298 @@ void img_bmp_encode(INT32 args)
pop_stack(); /* get rid of colortable & source objects */
}
+/*
+**! method mapping _decode(string data)
+**! method mapping decode_header(string data)
+**! method object decode(string data)
+**! Decode a BMP. Not all modes are supported.
+**!
+**! <ref>decode</ref> gives an image object,
+**! <ref>_decode</ref> gives a mapping in the format
+**! <pre>
+**! "type":"image/bmp",
+**! "image":image object,
+**! "colortable":colortable object (if applicable)
+**!
+**! "xsize":int,
+**! "ysize":int,
+**! "compression":int,
+**! "bpp":int,
+**! "windows":int,
+**! </pre>
+**!
+**! see also: encode
+**!
+**! returns the encoded image as a string
+**!
+**! bugs
+**! Doesn't support all BMP modes. At all.
+*/
+
+void i_img_bmp__decode(INT32 args,int header_only)
+{
+ p_wchar0 *s;
+ int len;
+ int xsize=0,ysize=0,bpp=0,comp=0;
+ struct image *img=NULL;
+ struct neo_colortable *nct=NULL;
+ struct object *o;
+ rgb_group *d;
+ int n=0,j,i,y,skip;
+ int windows=0;
+
+ if (args<1)
+ SIMPLE_TOO_FEW_ARGS_ERROR("Image.BMP.decode",1);
+
+ if (sp[-args].type!=T_STRING)
+ SIMPLE_BAD_ARG_ERROR("Image.BMP.decode",1,"string");
+ if (sp[-args].u.string->size_shift)
+ SIMPLE_BAD_ARG_ERROR("Image.BMP.decode",1,"8 bit string");
+
+ s=(p_wchar0*)sp[-args].u.string->str;
+ len=sp[-args].u.string->len;
+
+ pop_n_elems(args-1);
+
+ if (len<20)
+ error("Image.BMP.decode: not a BMP (file to short)\n");
+
+ if (s[0]!='B' || s[1]!='M')
+ error("Image.BMP.decode: not a BMP (illegal header)\n");
+
+ /* ignore stupid info like file size */
+
+ switch (int_from_32bit(s+14))
+ {
+ case 40: /* windows mode */
+
+ if (len<54)
+ error("Image.BMP.decode: unexpected EOF in header\n");
+
+ push_text("xsize");
+ push_int(xsize=int_from_32bit(s+14+4*1));
+ n++;
+
+ push_text("ysize");
+ push_int(ysize=int_from_32bit(s+14+4*2));
+ n++;
+
+ push_text("target_planes");
+ push_int(int_from_16bit(s+14+4*3));
+ n++;
+
+ push_text("bpp");
+ push_int(bpp=int_from_16bit(s+14+4*3+2));
+ n++;
+
+ push_text("compression");
+ push_int(comp=int_from_32bit(s+14+4*4));
+ n++;
+
+ push_text("xres");
+ push_int(int_from_32bit(s+14+4*5));
+ n++;
+
+ push_text("yres");
+ push_int(int_from_32bit(s+14+4*6));
+ n++;
+
+ push_text("windows");
+ push_int(windows=1);
+ n++;
+
+ s+=54;
+ len-=54;
+
+ break;
+
+ case 12: /* dos (?) mode */
+
+ if (len<26)
+ error("Image.BMP.decode: unexpected EOF in header\n");
+
+ push_text("xsize");
+ push_int(xsize=int_from_16bit(s+14+4));
+ n++;
+
+ push_text("ysize");
+ push_int(ysize=int_from_16bit(s+14+6));
+ n++;
+
+ push_text("target_planes");
+ push_int(int_from_16bit(s+14+8));
+ n++;
+
+ push_text("bpp");
+ push_int(bpp=int_from_16bit(s+14+10));
+ n++;
+
+ push_text("compression");
+ push_int(comp=0);
+ n++;
+
+ s+=26;
+ len-=26;
+
+ break;
+
+ default:
+ error("Image.BMP.decode: not a BMP (illegal info)\n");
+ }
+
+ if (header_only)
+ {
+ f_aggregate_mapping(n*2);
+ stack_swap();
+ pop_stack();
+ return;
+ }
+
+ if (bpp!=24) /* get palette */
+ {
+ push_text("colortable");
+
+ if (windows)
+ {
+ if ((4<<bpp)>len)
+ error("Image.BMP.decode: unexpected EOF in palette\n");
+
+ push_string(make_shared_binary_string(s,(4<<bpp)));
+ push_int(2);
+ push_object(o=clone_object(image_colortable_program,2));
+ nct=(struct neo_colortable*)get_storage(o,image_colortable_program);
+
+ s+=(4<<bpp);
+ len-=(4<<bpp);
+ }
+ else
+ {
+ if ((3<<bpp)>len)
+ error("Image.BMP.decode: unexpected EOF in palette\n");
+
+ push_string(make_shared_binary_string(s,(3<<bpp)));
+ push_int(1);
+ push_object(o=clone_object(image_colortable_program,2));
+ nct=(struct neo_colortable*)get_storage(o,image_colortable_program);
+
+ s+=(3<<bpp);
+ len-=(3<<bpp);
+ }
+ }
+
+ push_text("image");
+
+ push_int(xsize);
+ push_int(ysize);
+ push_object(o=clone_object(image_program,2));
+ img=(struct image*)get_storage(o,image_program);
+ n++;
+
+ if (comp)
+ error("Image.BMP.decode: can't handle compressed BMP\n");
+
+ switch (bpp)
+ {
+ case 24:
+ j=(len)/3;
+ y=img->ysize;
+ while (j && y--)
+ {
+ d=img->img+img->xsize*y;
+ i=img->xsize; if (i>j) i=j;
+ j-=i;
+ while (i--)
+ {
+ d->b=*(s++);
+ d->g=*(s++);
+ d->r=*(s++);
+ d++;
+ }
+ }
+ break;
+ case 8:
+ skip=4-(img->xsize&3);
+ j=len;
+ y=img->ysize;
+ while (j && y--)
+ {
+ d=img->img+img->xsize*y;
+ i=img->xsize; if (i>j) i=j;
+ j-=i;
+ while (i--)
+ *(d++)=nct->u.flat.entries[*(s++)].color;
+ if (j>=skip) { j-=skip; s+=skip; }
+ }
+ break;
+ case 4:
+ skip=3-((img->xsize/2)&3);
+ j=len;
+ y=img->ysize;
+ while (j && y--)
+ {
+ d=img->img+img->xsize*y;
+ i=img->xsize;
+ while (i && j--)
+ {
+ if (i) *(d++)=nct->u.flat.entries[(s[0]>>4)&15].color,i--;
+ if (i) *(d++)=nct->u.flat.entries[s[0]&15].color,i--;
+ s++;
+ }
+ if (j>=skip) { j-=skip; s+=skip; }
+ }
+ break;
+ case 1:
+ skip=3-((img->xsize/8)&3);
+ j=len;
+ y=img->ysize;
+ while (j && y--)
+ {
+ d=img->img+img->xsize*y;
+ i=img->xsize;
+ while (i && j--)
+ {
+ if (i) *(d++)=nct->u.flat.entries[!!(s[0]&128)].color,i--;
+ if (i) *(d++)=nct->u.flat.entries[!!(s[0]&64)].color,i--;
+ if (i) *(d++)=nct->u.flat.entries[!!(s[0]&32)].color,i--;
+ if (i) *(d++)=nct->u.flat.entries[!!(s[0]&16)].color,i--;
+ if (i) *(d++)=nct->u.flat.entries[!!(s[0]&8)].color,i--;
+ if (i) *(d++)=nct->u.flat.entries[!!(s[0]&4)].color,i--;
+ if (i) *(d++)=nct->u.flat.entries[!!(s[0]&2)].color,i--;
+ if (i) *(d++)=nct->u.flat.entries[s[0]&1].color,i--;
+ s++;
+ }
+ if (j>=skip) { j-=skip; s+=skip; }
+ }
+ break;
+ default:
+ error("Image.BMP.decode: unknown bpp: %d\n",bpp);
+ }
+
+ f_aggregate_mapping(n*2);
+ stack_swap();
+ pop_stack();
+}
+
+
+void img_bmp__decode(INT32 args)
+{
+ return i_img_bmp__decode(args,0);
+}
+
+void img_bmp_decode_header(INT32 args)
+{
+ return i_img_bmp__decode(args,1);
+}
+
+void f_index(INT32);
+
+void img_bmp_decode(INT32 args)
+{
+ img_bmp__decode(args);
+ push_text("image");
+ f_index(2);
+}
+
struct program *image_bmp_module_program=NULL;
void init_image_bmp(void)
@@ -247,6 +533,12 @@ void init_image_bmp(void)
add_function("encode",img_bmp_encode,
"function(object,void|object:string)",0);
+ add_function("_decode",img_bmp__decode,
+ "function(string:mapping)",0);
+ add_function("ddecode",img_bmp_decode,
+ "function(string:object)",0);
+ add_function("decode_header",img_bmp_decode_header,
+ "function(string:mapping)",0);
image_bmp_module_program=end_program();
push_object(clone_object(image_bmp_module_program,0));
--
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