diff options
Diffstat (limited to 'src/im_lua3.c')
| -rw-r--r-- | src/im_lua3.c | 1297 |
1 files changed, 1297 insertions, 0 deletions
diff --git a/src/im_lua3.c b/src/im_lua3.c new file mode 100644 index 0000000..1c85e59 --- /dev/null +++ b/src/im_lua3.c @@ -0,0 +1,1297 @@ +/** \file + * \brief LuaBinding for Lua 3 + * + * See Copyright Notice in im_lib.h + * $Id: im_lua3.c,v 1.1 2008/10/17 06:10:16 scuri Exp $ + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <lua.h> + +#include "im.h" +#include "im_lib.h" + +#include <cd.h> +#include <cdlua3_private.h> + +#include "imlua.h" + + +/***************************************************************************\ +* Globals. * +\***************************************************************************/ +static int color_tag; +static int imagergb_tag; +static int imagergba_tag; +static int palette_tag; +static int imagemap_tag; +static int channel_tag; + +static channel_t channel_info; + +#define IMLUA_VERSION "IMLua 1.2" +/***************************************************************************\ +* Creation and destruction functions. * +\***************************************************************************/ + +/***************************************************************************\ +* Creates a buffer for a RGB image. * +\***************************************************************************/ +static void imlua_createimagergb(void) +{ + lua_Object width, height; + long int width_i, height_i; + imagergb_t *imagergb_p; + + width = lua_getparam(1); + height = lua_getparam(2); + if (!(lua_isnumber(width) && lua_isnumber(height))) + lua_error("imCreateImageRGB: invalid dimensions parameter!"); + width_i = (long int) lua_getnumber(width); + height_i = (long int) lua_getnumber(height); + if (width_i < 1 || height_i < 1) + lua_error("imCreateImageRGB: image dimensions should be positive integers!"); + + if (lua_getparam(3) != LUA_NOOBJECT) + lua_error("imCreateImageRGB: too many parameters!"); + + imagergb_p = (imagergb_t *) malloc(sizeof(imagergb_t)); + if (!imagergb_p) { + lua_pushnil(); + return; + } + + imagergb_p->width = width_i; + imagergb_p->height = height_i; + imagergb_p->size = width_i*height_i; + imagergb_p->red = (unsigned char *) malloc(imagergb_p->size); + imagergb_p->green = (unsigned char *) malloc(imagergb_p->size); + imagergb_p->blue = (unsigned char *) malloc(imagergb_p->size); + + if (!(imagergb_p->red && imagergb_p->green && imagergb_p->blue)) { + if (imagergb_p->red) free(imagergb_p->red); + if (imagergb_p->green) free(imagergb_p->green); + if (imagergb_p->blue) free(imagergb_p->blue); + free(imagergb_p); + lua_pushnil(); + return; + } + + memset(imagergb_p->red, 255, imagergb_p->size); + memset(imagergb_p->green, 255, imagergb_p->size); + memset(imagergb_p->blue, 255, imagergb_p->size); + + lua_pushusertag((void *) imagergb_p, imagergb_tag); +} + +/***************************************************************************\ +* Frees a previously allocated imagergb. We don't free imagergb_p to avoid * +* problems if the user called killimagergb twice with the same object. The * +* structure will be freed by a userdata "gc" fallback in LUA 3.0. * +\***************************************************************************/ +static void imlua_killimagergb(void) +{ + lua_Object imagergb; + imagergb_t *imagergb_p; + + imagergb = lua_getparam(1); + if (imagergb == LUA_NOOBJECT) + lua_error("imKillImageRGB: imagergb parameter missing!"); + if (lua_isnil(imagergb)) + lua_error("imKillImageRGB: attempt to kill a NIL imagergb!"); + if (lua_tag(imagergb) != imagergb_tag) + lua_error("imKillImageRGB: invalid imagergb parameter!"); + imagergb_p = (imagergb_t *) lua_getuserdata(imagergb); + if (!(imagergb_p->red && imagergb_p->green && imagergb_p->blue)) + lua_error("imKillImageRGB: attempt to kill a killed imagergb!"); + + if (lua_getparam(2) != LUA_NOOBJECT) + lua_error("imKillImageRGB: too many parameters!"); + + free(imagergb_p->red); + free(imagergb_p->green); + free(imagergb_p->blue); + imagergb_p->red = NULL; + imagergb_p->green = NULL; + imagergb_p->blue = NULL; +} + +/***************************************************************************\ +* Creates a palette as a palette_tag usertag lua_Object. A palette can be * +* considered and treated as a color table. * +\***************************************************************************/ +static void imlua_createpalette(void) +{ + lua_Object size; + long int size_i; + palette_t *palette_p; + + size = lua_getparam(1); + if (!(lua_isnumber(size))) + lua_error("imCreatePalette: invalid palette parameter!"); + size_i = (long int) lua_getnumber(size); + if (size_i < 1) + lua_error("imCreatePalette: palette size should be a positive integer!"); + + if (lua_getparam(2) != LUA_NOOBJECT) + lua_error("imCreatePalette: too many parameters!"); + + palette_p = (palette_t *) malloc(sizeof(palette_t)); + if (!palette_p) { + lua_pushnil(); + return; + } + + palette_p->size = size_i; + palette_p->color = (long int *) malloc(palette_p->size * sizeof(long int)); + if (!palette_p->color) { + free(palette_p); + lua_pushnil(); + return; + } + + memset(palette_p->color, 255, palette_p->size * sizeof(long int)); + lua_pushusertag((void *) palette_p, palette_tag); +} + +/***************************************************************************\ +* Frees a previously allocated palette. We don't free palette_p to prevent * +* a problem if the user called killpalette twice with the same object. The * +* structure will be freed by a userdata "gc" fallback in LUA 3.0. * +\***************************************************************************/ +static void imlua_killpalette(void) +{ + lua_Object palette; + palette_t *palette_p; + + palette = lua_getparam(1); + if (palette == LUA_NOOBJECT) + lua_error("imKillPalette: palette parameter missing!"); + if (lua_isnil(palette)) + lua_error("imKillPalette: attempt to kill a NIL palette!"); + if (lua_tag(palette) != palette_tag) + lua_error("imKillPalette: invalid palette parameter!"); + palette_p = (palette_t *) lua_getuserdata(palette); + if (!palette_p->color) + lua_error("imKillPalette: attempt to kill a killed palette!"); + + if (lua_getparam(2) != LUA_NOOBJECT) + lua_error("imKillPalette: too many parameters!"); + + free(palette_p->color); + palette_p->color = NULL; +} + +/***************************************************************************\ +* Creates a imagemap as a imagemap_tag usertag lua_Object. * +\***************************************************************************/ +static void imlua_createimagemap(void) +{ + lua_Object width; + lua_Object height; + + long int width_i; + long int height_i; + imagemap_t *imagemap_p; + + width = lua_getparam(1); + height = lua_getparam(2); + if (!(lua_isnumber(width) && lua_isnumber(height))) + lua_error("imCreateImageMap: invalid dimensions parameter!"); + width_i = (long int) lua_getnumber(width); + height_i = (long int) lua_getnumber(height); + if (width_i < 1 || height_i < 1) + lua_error("imCreateImageMap: imagemap dimensions should be positive integers!"); + + if (lua_getparam(3) != LUA_NOOBJECT) + lua_error("imCreateImageMap: too many parameters!"); + + imagemap_p = (imagemap_t *) malloc(sizeof(imagemap_t)); + if (!imagemap_p) { + lua_pushnil(); + return; + } + + imagemap_p->size = width_i*height_i; + imagemap_p->width = width_i; + imagemap_p->height = height_i; + imagemap_p->index = (unsigned char *) malloc(imagemap_p->size); + if (!imagemap_p->index) { + free(imagemap_p); + lua_pushnil(); + return; + } + + memset(imagemap_p->index, 0, imagemap_p->size); + lua_pushusertag((void *) imagemap_p, imagemap_tag); +} + +/***************************************************************************\ +* Frees a previously allocated imagemap. We don't free imagemap_p to avoid * +* problems if the user called killimagemap twice with the same object. The * +* structure will be freed by a userdata "gc" fallback in LUA 3.0. * +\***************************************************************************/ +static void imlua_killimagemap(void) +{ + lua_Object imagemap; + imagemap_t *imagemap_p; + + imagemap = lua_getparam(1); + if (imagemap == LUA_NOOBJECT) + lua_error("imKillImageMap: imagemap parameter missing!"); + if (lua_isnil(imagemap)) + lua_error("imKillImageMap: attempt to kill a NIL imagemap!"); + if (lua_tag(imagemap) != imagemap_tag) + lua_error("imKillImageMap: invalid imagemap parameter!"); + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + if (!imagemap_p->index) + lua_error("imKillImageMap: attempt to kill a killed imagemap!"); + + if (lua_getparam(2) != LUA_NOOBJECT) + lua_error("imKillImageMap: too many parameters!"); + + free(imagemap_p->index); + imagemap_p->index = NULL; +} + +/***************************************************************************\ +* IM API Functions. * +\***************************************************************************/ + +/***************************************************************************\ +* imFileFormat * +\***************************************************************************/ +static void imlua_fileformat(void) +{ + lua_Object file; + + char *file_s; + int format_i; + int compress_i; + + int err; + + file = lua_getparam(1); + if (!lua_isstring(file)) + lua_error("imFileFormat: invalid filename parameter!"); + file_s = (char *) lua_getstring(file); + + if (lua_getparam(2) != LUA_NOOBJECT) + lua_error("imFileFormat: too many parameters!"); + + err = imFileFormat(file_s, &format_i); + + compress_i = (format_i & IM_DEFAULT) ? 1 : 0; + format_i = format_i & 0xFF; + + /* if success, return the format */ + if (err == IM_ERR_NONE) { + lua_pushnumber( format_i); + lua_pushnumber( compress_i); + } + /* if failure, return nil */ + else { + lua_pushnil(); + lua_pushnil(); + } + + lua_pushnumber( err); +} + +/***************************************************************************\ +* imFileFormat * +\***************************************************************************/ +static void imlua_imageinfo(void) +{ + lua_Object file; + + char *file_s; + + int width, height, image_type, pal_size; + int err; + + file = lua_getparam(1); + if (!lua_isstring(file)) + lua_error("imFileFormat: invalid filename parameter!"); + file_s = (char *) lua_getstring(file); + + if (lua_getparam(2) != LUA_NOOBJECT) + lua_error("imFileFormat: too many parameters!"); + + err = imImageInfo(file_s, &width, &height, &image_type, &pal_size); + + /* if success, return the format */ + if (err == IM_ERR_NONE) { + lua_pushnumber( width); + lua_pushnumber( height); + lua_pushnumber( image_type); + lua_pushnumber( pal_size); + } + /* if failure, return nil */ + else { + lua_pushnil(); + lua_pushnil(); + lua_pushnil(); + lua_pushnil(); + } + + lua_pushnumber( err); +} + +/***************************************************************************\ +* imEncodeColor * +\***************************************************************************/ +static void imlua_encodecolor(void) +{ + lua_Object red, green, blue; + float red_f, green_f, blue_f; + unsigned char red_i, green_i, blue_i; + long int color_i; + + red = lua_getparam(1); + green = lua_getparam(2); + blue = lua_getparam(3); + + if (lua_getparam(4) != LUA_NOOBJECT) + lua_error("imEncodeColor: too many parameters!"); + + if (!(lua_isnumber(red) && lua_isnumber(green) && lua_isnumber(blue))) + lua_error("imEncodeColor: invalid color component parameter!"); + + red_f = (float)lua_getnumber(red); + green_f = (float)lua_getnumber(green); + blue_f = (float)lua_getnumber(blue); + + if (red_f < 0 || red_f > 255 || green_f < 0 || + green_f > 255 || blue_f < 0 || blue_f > 255) + lua_error("imEncodeColor: color components values should be in range [0, 255]!"); + + red_i = (unsigned char) (red_f); + green_i = (unsigned char) (green_f); + blue_i = (unsigned char) (blue_f); + + color_i = imEncodeColor(red_i, green_i, blue_i); + lua_pushusertag((void *) color_i, color_tag); +} + +/***************************************************************************\ +* imDecodeColor * +\***************************************************************************/ +static void imlua_decodecolor(void) +{ + lua_Object color; + long int color_i; + unsigned char red_i, green_i, blue_i; + + color = lua_getparam(1); + if (lua_tag(color) != color_tag) + lua_error("imDecodeColor: invalid color parameter!"); + color_i = (long int) lua_getuserdata(color); + + if (lua_getparam(2) != LUA_NOOBJECT) + lua_error("imDecodeColor: too many parameters!"); + + imDecodeColor(&red_i, &green_i, &blue_i, color_i); + + lua_pushnumber( red_i); + lua_pushnumber( green_i); + lua_pushnumber( blue_i); +} + +/***************************************************************************\ +* imLoadRGB * +\***************************************************************************/ +static void imlua_loadrgb(void) +{ + lua_Object file, imagergb; + + imagergb_t *imagergb_p; + char *file_s; + + int err; + + file = lua_getparam(1); + if (!lua_isstring(file)) + lua_error("imLoadRGB: invalid filename parameter!"); + file_s = (char *) lua_getstring(file); + + imagergb = lua_getparam(2); + if (lua_tag(imagergb) != imagergb_tag) + lua_error("imLoadRGB: invalid imagergb parameter!"); + imagergb_p = (imagergb_t *) lua_getuserdata(imagergb); + + if (lua_getparam(3) != LUA_NOOBJECT) + lua_error("imLoadRGB: too many parameters!"); + + err = imLoadRGB(file_s, imagergb_p->red, imagergb_p->green, imagergb_p->blue); + lua_pushnumber( err); +} + +/***************************************************************************\ +* imLoadMap * +\***************************************************************************/ +static void imlua_loadmap(void) +{ + lua_Object file, imagemap, palette; + + imagemap_t *imagemap_p; + palette_t *palette_p; + char *file_s; + + int err; + + file = lua_getparam(1); + if (!lua_isstring(file)) + lua_error("imLoadMap: invalid filename parameter!"); + file_s = (char *) lua_getstring(file); + + imagemap = lua_getparam(2); + if (lua_tag(imagemap) != imagemap_tag) + lua_error("imLoadMap: invalid imagemap parameter!"); + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + + palette = lua_getparam(3); + if (lua_tag(palette) != palette_tag) + lua_error("imLoadMap: invalid palette parameter!"); + palette_p = (palette_t *) lua_getuserdata(palette); + + if (lua_getparam(4) != LUA_NOOBJECT) + lua_error("imLoadMap: too many parameters!"); + + err = imLoadMap(file_s, imagemap_p->index, palette_p->color); + lua_pushnumber( err); +} + +/***************************************************************************\ +* imSaveRGB * +\***************************************************************************/ +static void imlua_savergb(void) +{ + lua_Object file, imagergb, format, compress; + + imagergb_t *imagergb_p; + char *file_s; + int format_i; + int compress_i; + + int err; + + imagergb = lua_getparam(1); + if (lua_tag(imagergb) != imagergb_tag) + lua_error("imSaveRGB: invalid imagergb parameter!"); + imagergb_p = (imagergb_t *) lua_getuserdata(imagergb); + + format = lua_getparam(2); + if (!lua_isnumber(format)) + lua_error("imSaveRGB: invalid format parameter!"); + format_i = (int) lua_getnumber(format); + + compress = lua_getparam(3); + if (!lua_isnumber(compress)) + lua_error("imSaveRGB: invalid compression parameter!"); + compress_i = (int) lua_getnumber(compress); + + file = lua_getparam(4); + if (!lua_isstring(file)) + lua_error("imSaveRGB: invalid filename parameter!"); + file_s = (char *) lua_getstring(file); + + if (lua_getparam(5) != LUA_NOOBJECT) + lua_error("imSaveRGB: too many parameters!"); + + err = imSaveRGB(imagergb_p->width, imagergb_p->height, format_i | (compress_i << 8), + imagergb_p->red, imagergb_p->green, imagergb_p->blue, file_s); + lua_pushnumber( err); +} + +/***************************************************************************\ +* imSaveMap * +\***************************************************************************/ +static void imlua_savemap(void) +{ + lua_Object file, imagemap, palette, format, compress; + + imagemap_t *imagemap_p; + palette_t *palette_p; + char *file_s; + int format_i; + int compress_i; + + int err; + + imagemap = lua_getparam(1); + if (lua_tag(imagemap) != imagemap_tag) + lua_error("imSaveMap: invalid imagemap parameter!"); + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + + palette = lua_getparam(2); + if (lua_tag(palette) != palette_tag) + lua_error("imLoadMap: invalid palette parameter!"); + palette_p = (palette_t *) lua_getuserdata(palette); + + format = lua_getparam(3); + if (!lua_isnumber(format)) + lua_error("imSaveMap: invalid format parameter!"); + format_i = (int) lua_getnumber(format); + + compress = lua_getparam(4); + if (!lua_isnumber(compress)) + lua_error("imSaveMap: invalid compression parameter!"); + compress_i = (int) lua_getnumber(compress); + + file = lua_getparam(5); + if (!lua_isstring(file)) + lua_error("imSaveMap: invalid filename parameter!"); + file_s = (char *) lua_getstring(file); + + if (lua_getparam(6) != LUA_NOOBJECT) + lua_error("imSaveMap: too many parameters!"); + + err = imSaveMap(imagemap_p->width, imagemap_p->height, format_i | (compress_i << 8), + imagemap_p->index, palette_p->size, palette_p->color, file_s); + lua_pushnumber( err); +} + +/***************************************************************************\ +* imRGB2Map * +\***************************************************************************/ +static void imlua_rgb2map(void) +{ + lua_Object imagergb, imagemap, palette; + + imagemap_t *imagemap_p; + palette_t *palette_p; + imagergb_t *imagergb_p; + + imagergb = lua_getparam(1); + if (lua_tag(imagergb) != imagergb_tag) + lua_error("imRGB2Map: invalid imagergb parameter!"); + imagergb_p = (imagergb_t *) lua_getuserdata(imagergb); + + imagemap = lua_getparam(2); + if (lua_tag(imagemap) != imagemap_tag) + lua_error("imRGB2Map: invalid imagemap parameter!"); + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + + palette = lua_getparam(3); + if (lua_tag(palette) != palette_tag) + lua_error("imRGB2Map: invalid palette parameter!"); + palette_p = (palette_t *) lua_getuserdata(palette); + + if (lua_getparam(4) != LUA_NOOBJECT) + lua_error("imRGB2Map: too many parameters!"); + + if (imagergb_p->size != imagemap_p->size) + lua_error("imRGB2Map: images have incompatible dimensions!"); + + imRGB2Map(imagergb_p->width, imagergb_p->height, imagergb_p->red, + imagergb_p->green, imagergb_p->blue, imagemap_p->index, palette_p->size, + palette_p->color); +} + +/***************************************************************************\ +* imMap2RGB * +\***************************************************************************/ +static void imlua_map2rgb(void) +{ + lua_Object imagergb, imagemap, palette; + + imagemap_t *imagemap_p; + palette_t *palette_p; + imagergb_t *imagergb_p; + + imagemap = lua_getparam(1); + if (lua_tag(imagemap) != imagemap_tag) + lua_error("imMap2RGB: invalid imagemap parameter!"); + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + + palette = lua_getparam(2); + if (lua_tag(palette) != palette_tag) + lua_error("imMap2RGB: invalid palette parameter!"); + palette_p = (palette_t *) lua_getuserdata(palette); + + imagergb = lua_getparam(3); + if (lua_tag(imagergb) != imagergb_tag) + lua_error("imMap2RGB: invalid imagergb parameter!"); + imagergb_p = (imagergb_t *) lua_getuserdata(imagergb); + + if (lua_getparam(4) != LUA_NOOBJECT) + lua_error("imMap2RGB: too many parameters!"); + + if (imagergb_p->size != imagemap_p->size) + lua_error("imMap2RGB: images have incompatible dimensions!"); + + imMap2RGB(imagemap_p->width, imagemap_p->height, imagemap_p->index, palette_p->size, + palette_p->color, imagergb_p->red, imagergb_p->green, imagergb_p->blue); +} + +/***************************************************************************\ +* imMap2Gray * +\***************************************************************************/ +static void imlua_map2gray(void) +{ + lua_Object imagemap, palette, graymap, grays; + + imagemap_t *imagemap_p; + palette_t *palette_p; + imagemap_t *graymap_p; + palette_t *grays_p; + + imagemap = lua_getparam(1); + if (lua_tag(imagemap) != imagemap_tag) + lua_error("imMap2Gray: invalid imagemap parameter!"); + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + + palette = lua_getparam(2); + if (lua_tag(palette) != palette_tag) + lua_error("imMap2Gray: invalid palette parameter!"); + palette_p = (palette_t *) lua_getuserdata(palette); + + graymap = lua_getparam(3); + if (lua_tag(graymap) != imagemap_tag) + lua_error("imMap2Gray: invalid graymap parameter!"); + graymap_p = (imagemap_t *) lua_getuserdata(graymap); + + grays = lua_getparam(4); + if (lua_tag(grays) != palette_tag) + lua_error("imMap2Gray: invalid grays parameter!"); + grays_p = (palette_t *) lua_getuserdata(grays); + + if (lua_getparam(5) != LUA_NOOBJECT) + lua_error("imMap2Gray: too many parameters!"); + + if (imagemap_p->size != graymap_p->size) + lua_error("imMap2Gray: images have incompatible dimensions!"); + + if (grays_p->size < 256) + lua_error("imMap2Gray: grays palette should be of size 256!"); + + imMap2Gray(imagemap_p->width, imagemap_p->height, imagemap_p->index, + palette_p->size, palette_p->color, graymap_p->index, grays_p->color); +} + +/***************************************************************************\ +* imRGB2Gray * +\***************************************************************************/ +static void imlua_rgb2gray(void) +{ + lua_Object imagergb, graymap, grays; + + imagergb_t *imagergb_p; + imagemap_t *graymap_p; + palette_t *grays_p; + + imagergb = lua_getparam(1); + if (lua_tag(imagergb) != imagergb_tag) + lua_error("imRGB2Gray: invalid imagergb parameter!"); + imagergb_p = (imagergb_t *) lua_getuserdata(imagergb); + + graymap = lua_getparam(2); + if (lua_tag(graymap) != imagemap_tag) + lua_error("imRGB2Gray: invalid graymap parameter!"); + graymap_p = (imagemap_t *) lua_getuserdata(graymap); + + grays = lua_getparam(3); + if (lua_tag(grays) != palette_tag) + lua_error("imRGB2Gray: invalid grays parameter!"); + grays_p = (palette_t *) lua_getuserdata(grays); + + if (lua_getparam(4) != LUA_NOOBJECT) + lua_error("imRGB2Gray: too many parameters!"); + + if (imagergb_p->size != graymap_p->size) + lua_error("imRGB2Gray: images have incompatible dimensions!"); + + if (grays_p->size < 256) + lua_error("imRGB2Gray: grays palette should be of size 256!"); + + imRGB2Gray(imagergb_p->width, imagergb_p->height, imagergb_p->red, + imagergb_p->green, imagergb_p->blue, graymap_p->index, grays_p->color); +} + +/***************************************************************************\ +* imStretch. * +\***************************************************************************/ +static void imlua_stretch(void) +{ + lua_Object src, dst; + + imagemap_t *srcmap_p; + imagemap_t *dstmap_p; + imagergb_t *srcrgb_p; + imagergb_t *dstrgb_p; + + src = lua_getparam(1); + dst = lua_getparam(2); + if (lua_getparam(3) != LUA_NOOBJECT) + lua_error("imStretch: too many parameters!"); + + if ((lua_tag(src) == imagergb_tag) && (lua_tag(dst) == imagergb_tag)) { + srcrgb_p = (imagergb_t *) lua_getuserdata(src); + dstrgb_p = (imagergb_t *) lua_getuserdata(dst); + imStretch(srcrgb_p->width, srcrgb_p->height, srcrgb_p->red, + dstrgb_p->width, dstrgb_p->height, dstrgb_p->red); + imStretch(srcrgb_p->width, srcrgb_p->height, srcrgb_p->green, + dstrgb_p->width, dstrgb_p->height, dstrgb_p->green); + imStretch(srcrgb_p->width, srcrgb_p->height, srcrgb_p->blue, + dstrgb_p->width, dstrgb_p->height, dstrgb_p->blue); + } + else if ((lua_tag(src) == imagemap_tag) && (lua_tag(dst) == imagemap_tag)) { + srcmap_p = (imagemap_t *) lua_getuserdata(src); + dstmap_p = (imagemap_t *) lua_getuserdata(dst); + imStretch(srcmap_p->width, srcmap_p->height, srcmap_p->index, + dstmap_p->width, dstmap_p->height, dstmap_p->index); + } + else { + lua_error("imStretch: inconsistent parameters!"); + } +} + +/***************************************************************************\ +* imResize. * +\***************************************************************************/ +static void imlua_resize(void) +{ + lua_Object src, dst; + + imagergb_t *srcrgb_p; + imagergb_t *dstrgb_p; + + src = lua_getparam(1); + dst = lua_getparam(2); + if (lua_getparam(3) != LUA_NOOBJECT) + lua_error("imResize: too many parameters!"); + + if ((lua_tag(src) == imagergb_tag) && (lua_tag(dst) == imagergb_tag)) { + srcrgb_p = (imagergb_t *) lua_getuserdata(src); + dstrgb_p = (imagergb_t *) lua_getuserdata(dst); + imStretch(srcrgb_p->width, srcrgb_p->height, srcrgb_p->red, + dstrgb_p->width, dstrgb_p->height, dstrgb_p->red); + imStretch(srcrgb_p->width, srcrgb_p->height, srcrgb_p->green, + dstrgb_p->width, dstrgb_p->height, dstrgb_p->green); + imStretch(srcrgb_p->width, srcrgb_p->height, srcrgb_p->blue, + dstrgb_p->width, dstrgb_p->height, dstrgb_p->blue); + } + else { + lua_error("imResize: parameters must be of type imagergb_tag!"); + } +} + +/***************************************************************************\ +* imVersion. * +\***************************************************************************/ +static void imlua_version(void) +{ + if (lua_getparam(1) != LUA_NOOBJECT) + lua_error("imVersion: too many parameters!"); + + lua_pushstring(imVersion()); +} + +/***************************************************************************\ +* Fallback implementation. * +\***************************************************************************/ + +/***************************************************************************\ +* imagemap "settable" fallback. * +\***************************************************************************/ +static void imagemapsettable_fb(void) +{ + lua_Object imagemap, index, value; + + imagemap_t *imagemap_p; + long int index_i; + long int value_i; + + imagemap = lua_getparam(1); + index = lua_getparam(2); + value = lua_getparam(3); + + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + if (!imagemap_p) { + lua_error("imagemap_tag \"settable\": invalid imagemap_tag object!"); + } + + if (!lua_isnumber(index)) { + lua_error("imagemap_tag \"settable\": index should be a number!"); + } + + if (!lua_isnumber(value)) { + lua_error("imagemap_tag \"settable\": value should be a number!"); + } + + value_i = (long int) lua_getnumber(value); + if ((value_i < 0 || value_i > 255)) + lua_error("imagemap_tag \"settable\": value should be in range [0, 255]!"); + + index_i = (long int) lua_getnumber(index); + if (index_i < 0 || index_i >= imagemap_p->size) + lua_error("imagemap_tag \"settable\": index is out of bounds!"); + + imagemap_p->index[index_i] = (unsigned char) value_i; +} + +/***************************************************************************\ +* palette "settable" fallback. * +\***************************************************************************/ +static void palettesettable_fb(void) +{ + lua_Object palette, index, color; + + palette_t *palette_p; + long int index_i; + long int color_i; + + palette = lua_getparam(1); + index = lua_getparam(2); + color = lua_getparam(3); + + palette_p = (palette_t *) lua_getuserdata(palette); + if (!palette_p) { + lua_error("palette_tag \"settable\": invalid palette_tag object!"); + } + + if (!lua_isnumber(index)) { + lua_error("palette_tag \"settable\": index should be a number!"); + } + + if (lua_tag(color) != color_tag) + lua_error("palette_tag \"settable\": value should be of type color_tag!"); + + color_i = (long int) lua_getuserdata(color); + + index_i = (long int) lua_getnumber(index); + if (index_i < 0 || index_i >= palette_p->size) + lua_error("palette_tag \"settable\": index is out of bounds!"); + + palette_p->color[index_i] = color_i; +} + +/***************************************************************************\ +* channel "settable" fallback. This fallback is called when a LUA line like * +* "imagergb.r[y*w + x] = c" is executed. The imagergb "gettable" fallback * +* fills and returns a channel structure with info about the buffer. This * +* structure is consulted and the value is assigned where it should. * +\***************************************************************************/ +static void channelsettable_fb(void) +{ + lua_Object channel, index, value; + + channel_t *channel_p; + long int index_i; + long int value_i; + + channel = lua_getparam(1); + index = lua_getparam(2); + value = lua_getparam(3); + + channel_p = (channel_t *) lua_getuserdata(channel); + if (!channel_p) { + lua_error("channel_tag \"settable\": invalid channel_tag object!"); + } + + if (!lua_isnumber(index)) { + lua_error("channel_tag \"settable\": index should be a number!"); + } + index_i = (long int) lua_getnumber(index); + if (index_i < 0 || index_i >= channel_p->size) { + lua_error("channel_tag \"settable\": index is out of bounds!"); + } + + if (!lua_isnumber(value)) { + lua_error("channel_tag \"settable\": value should be a number!"); + } + value_i = (long int) lua_getnumber(value); + if ((value_i < 0 || value_i > 255)) { + lua_error("channel_tag \"settable\": value should be in range [0, 255]!"); + } + + channel_p->value[index_i] = (unsigned char) value_i; +} + +/***************************************************************************\ +* imagemap "gettable" fallback. * +\***************************************************************************/ +static void imagemapgettable_fb(void) +{ + lua_Object imagemap, index; + + imagemap_t *imagemap_p; + long int index_i; + + imagemap = lua_getparam(1); + index = lua_getparam(2); + + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + if (!imagemap_p) + lua_error("imagemap_tag \"gettable\": invalid imagemap_tag object!"); + + if (!lua_isnumber(index)) { + lua_error("imagemap_tag \"gettable\": index should be a number!"); + } + + index_i = (long int) lua_getnumber(index); + if (index_i < 0 || index_i >= imagemap_p->size) + lua_error("imagemap_tag \"gettable\": index is out of bounds!"); + + lua_pushnumber( imagemap_p->index[index_i]); +} + +/***************************************************************************\ +* palette "gettable" fallback. * +\***************************************************************************/ +static void palettegettable_fb(void) +{ + lua_Object palette, index; + + palette_t *palette_p; + long int index_i; + + palette = lua_getparam(1); + index = lua_getparam(2); + + palette_p = (palette_t *) lua_getuserdata(palette); + if (!palette_p) + lua_error("palette_tag \"gettable\": invalid palette_tag object!"); + + if (!lua_isnumber(index)) { + lua_error("palette_tag \"gettable\": index should be a number!"); + } + + index_i = (long int) lua_getnumber(index); + if (index_i < 0 || index_i >= palette_p->size) + lua_error("palette_tag \"gettable\": index is out of bounds!"); + + lua_pushusertag((void *) palette_p->color[index_i], color_tag); +} + +/***************************************************************************\ +* channel "gettable" fallback. This fallback is called when a LUA line like * +* "c = imagergb.r[y*w + x]" is executed. The imagergb "gettable" fallback * +* fills and returns a channel structure with info about the buffer. This * +* structure is consulted and the appropriate value is returned. * +\***************************************************************************/ +static void channelgettable_fb(void) +{ + lua_Object channel, index; + + channel_t *channel_p; + long int index_i; + + channel = lua_getparam(1); + index = lua_getparam(2); + + channel_p = (channel_t *) lua_getuserdata(channel); + if (!channel_p) { + lua_error("channel_tag \"gettable\": invalid channel_tag object!"); + } + + if (!lua_isnumber(index)) { + lua_error("channel_tag \"gettable\": index should be a number!"); + } + index_i = (long int) lua_getnumber(index); + if (index_i < 0 || index_i >= channel_p->size) { + lua_error("channel_tag \"gettable\": index is out of bounds!"); + } + + lua_pushnumber( channel_p->value[index_i]); +} + +/***************************************************************************\ +* imagergb "gettable" fallback. This fallback is called when a LUA line * +* like "c = imagergb.r[y*w + x]" or "imagergb.r[y*w + x] = c" is executed. * +* The channel_info global is filled and its address is returned with a * +* channel_tag usertag lua_Object. The following "gettable" or "settable" * +* then assigns or returns the appropriate value. * +\***************************************************************************/ +static void imagergbgettable_fb(void) +{ + lua_Object imagergb, index; + + char *index_s; + imagergb_t *imagergb_p; + + imagergb = lua_getparam(1); + index = lua_getparam(2); + + imagergb_p = (imagergb_t *) lua_getuserdata(imagergb); + if (!imagergb_p) + lua_error("imagergb_tag \"gettable\": invalid imagergb_tag object!"); + + if (!lua_isstring(index)) { + lua_error("imagergb_tag \"gettable\": index should be a channel name!"); + } + index_s = (char *) lua_getstring(index); + + channel_info.size = imagergb_p->size; + + if (*index_s == 'r' || *index_s == 'R') { + channel_info.value = imagergb_p->red; + } + else if (*index_s == 'g' || *index_s == 'G') { + channel_info.value = imagergb_p->green; + } + else if (*index_s == 'b' || *index_s == 'B') { + channel_info.value = imagergb_p->blue; + } + else { + lua_error("imagergb_tag \"gettable\": index is an invalid channel name!"); + } + + lua_pushusertag((void *) &channel_info, channel_tag); +} + +/***************************************************************************\ +* imagergba "gettable" fallback. This fallback is called when a LUA line * +* like "c = imagergba.r[y*w + x]" or "imagergba.r[y*w + x] = c" is executed.* +* The channel_info global is filled and its address is returned with a * +* channel_tag usertag lua_Object. The following "gettable" or "settable" * +* then assigns or returns the appropriate value. * +\***************************************************************************/ +static void imagergbagettable_fb(void) +{ + lua_Object imagergba, index; + + char *index_s; + imagergba_t *imagergba_p; + + imagergba = lua_getparam(1); + index = lua_getparam(2); + + imagergba_p = (imagergba_t *) lua_getuserdata(imagergba); + if (!imagergba_p) + lua_error("imagergba_tag \"gettable\": invalid imagergba_tag object!"); + + if (!lua_isstring(index)) { + lua_error("imagergba_tag \"gettable\": index should be a channel name!"); + } + index_s = (char *) lua_getstring(index); + + channel_info.size = imagergba_p->size; + + if (*index_s == 'r' || *index_s == 'R') { + channel_info.value = imagergba_p->red; + } + else if (*index_s == 'g' || *index_s == 'G') { + channel_info.value = imagergba_p->green; + } + else if (*index_s == 'b' || *index_s == 'B') { + channel_info.value = imagergba_p->blue; + } + else if (*index_s == 'a' || *index_s == 'A') { + channel_info.value = imagergba_p->alpha; + } + else { + lua_error("imagergba_tag \"gettable\": index is an invalid channel name!"); + } + + lua_pushusertag((void *) &channel_info, channel_tag); +} + +/***************************************************************************\ +* palette "gc" fallback. * +\***************************************************************************/ +static void palettegc_fb(void) +{ + lua_Object palette; + + palette_t *palette_p; + + palette = lua_getparam(1); + palette_p = (palette_t *) lua_getuserdata(palette); + if (!palette_p) + lua_error("palette_tag \"gc\": invalid palette_tag object!"); + + /* if the palette has not been killed, kill it */ + if (palette_p->color) free(palette_p->color); + + /* free the palette_t structure */ + free(palette_p); +} + +/***************************************************************************\ +* imagergb "gc" fallback. * +\***************************************************************************/ +static void imagergbgc_fb(void) +{ + lua_Object imagergb; + + imagergb_t *imagergb_p; + + imagergb = lua_getparam(1); + imagergb_p = (imagergb_t *) lua_getuserdata(imagergb); + if (!imagergb_p) + lua_error("imagergb_tag \"gc\": invalid imagergb_tag object!"); + + /* if the imagergb has not been killed, kill it */ + if (imagergb_p->red) free(imagergb_p->red); + if (imagergb_p->green) free(imagergb_p->green); + if (imagergb_p->blue) free(imagergb_p->blue); + + /* free the imagergb_t structure */ + free(imagergb_p); +} + +/***************************************************************************\ +* imagergba "gc" fallback. * +\***************************************************************************/ +static void imagergbagc_fb(void) +{ + lua_Object imagergba; + + imagergba_t *imagergba_p; + + imagergba = lua_getparam(1); + imagergba_p = (imagergba_t *) lua_getuserdata(imagergba); + if (!imagergba_p) + lua_error("imagergba_tag \"gc\": invalid imagergba_tag object!"); + + /* if the imagergba has not been killed, kill it */ + if (imagergba_p->red) free(imagergba_p->red); + if (imagergba_p->green) free(imagergba_p->green); + if (imagergba_p->blue) free(imagergba_p->blue); + if (imagergba_p->alpha) free(imagergba_p->alpha); + + /* free the imagergba_t structure */ + free(imagergba_p); +} + +/***************************************************************************\ +* imagemap "gc" fallback. * +\***************************************************************************/ +static void imagemapgc_fb(void) +{ + lua_Object imagemap; + + imagemap_t *imagemap_p; + + imagemap = lua_getparam(1); + imagemap_p = (imagemap_t *) lua_getuserdata(imagemap); + if (!imagemap_p) + lua_error("imagemap_tag \"gc\": invalid imagemap_tag object!"); + + /* if the imagemap has not been killed, kill it */ + if (imagemap_p->index) free(imagemap_p->index); + + /* free the imagemap_t structure */ + free(imagemap_p); +} + +/***************************************************************************\ +* Initialization code. * +\***************************************************************************/ + +/***************************************************************************\ +* Initializes IMLua. * +\***************************************************************************/ +void imlua_open(void) +{ + lua_Object cdlua_tag; + + /* check if CD has been initialized */ + cdlua_tag = lua_getglobal("CDLUA_INSTALLED"); + + /* get CD defined tags, let CD deal with the user tag objects */ + if ((cdlua_tag != LUA_NOOBJECT) && (!lua_isnil(cdlua_tag))) { + cdlua_tag = lua_getglobal("CDLUA_COLOR_TAG"); + color_tag = (int) lua_getnumber(cdlua_tag); + cdlua_tag = lua_getglobal("CDLUA_IMAGERGB_TAG"); + imagergb_tag = (int) lua_getnumber(cdlua_tag); + cdlua_tag = lua_getglobal("CDLUA_IMAGERGBA_TAG"); + imagergba_tag = (int) lua_getnumber(cdlua_tag); + cdlua_tag = lua_getglobal("CDLUA_PALETTE_TAG"); + palette_tag = (int) lua_getnumber(cdlua_tag); + cdlua_tag = lua_getglobal("CDLUA_IMAGEMAP_TAG"); + imagemap_tag = (int) lua_getnumber(cdlua_tag); + cdlua_tag = lua_getglobal("CDLUA_CHANNEL_TAG"); + channel_tag = (int) lua_getnumber(cdlua_tag); + } + /* define IM own tags and fallbacks */ + else { + color_tag = lua_newtag(); + imagergb_tag = lua_newtag(); + imagergba_tag = lua_newtag(); + imagemap_tag = lua_newtag(); + palette_tag = lua_newtag(); + channel_tag = lua_newtag(); + + /* associate the fallbacks */ + lua_pushcfunction(palettesettable_fb); lua_settagmethod(palette_tag, "settable"); + lua_pushcfunction(channelsettable_fb); lua_settagmethod(channel_tag, "settable"); + lua_pushcfunction(imagemapsettable_fb); lua_settagmethod(imagemap_tag, "settable"); + + lua_pushcfunction(imagergbgettable_fb); lua_settagmethod(imagergb_tag, "gettable"); + lua_pushcfunction(imagergbagettable_fb); lua_settagmethod(imagergba_tag, "gettable"); + lua_pushcfunction(palettegettable_fb); lua_settagmethod(palette_tag, "gettable"); + lua_pushcfunction(imagemapgettable_fb); lua_settagmethod(imagemap_tag, "gettable"); + lua_pushcfunction(channelgettable_fb); lua_settagmethod(channel_tag, "gettable"); + + lua_pushcfunction(imagergbgc_fb); lua_settagmethod(imagergb_tag, "gc"); + lua_pushcfunction(imagergbagc_fb); lua_settagmethod(imagergba_tag, "gc"); + lua_pushcfunction(palettegc_fb); lua_settagmethod(palette_tag, "gc"); + lua_pushcfunction(imagemapgc_fb); lua_settagmethod(imagemap_tag, "gc"); + } + + /* register used tags in global context for other libraries use */ + lua_pushnumber(1.0f); lua_setglobal("IMLUA_INSTALLED"); + lua_pushnumber( color_tag); lua_setglobal("IMLUA_COLOR_TAG"); + lua_pushnumber( imagergb_tag); lua_setglobal("IMLUA_IMAGERGB_TAG"); + lua_pushnumber( imagergba_tag); lua_setglobal("IMLUA_IMAGERGBA_TAG"); + lua_pushnumber( imagemap_tag); lua_setglobal("IMLUA_IMAGEMAP_TAG"); + lua_pushnumber( palette_tag); lua_setglobal("IMLUA_PALETTE_TAG"); + lua_pushnumber( channel_tag); lua_setglobal("IMLUA_CHANNEL_TAG"); + + /* registered IM functions */ + lua_register("imDecodeColor", imlua_decodecolor); + lua_register("imEncodeColor", imlua_encodecolor); + lua_register("imLoadRGB", imlua_loadrgb); + lua_register("imLoadMap", imlua_loadmap); + lua_register("imSaveRGB", imlua_savergb); + lua_register("imSaveMap", imlua_savemap); + lua_register("imFileFormat", imlua_fileformat); + lua_register("imImageInfo", imlua_imageinfo); + lua_register("imRGB2Map", imlua_rgb2map); + lua_register("imMap2RGB", imlua_map2rgb); + lua_register("imRGB2Gray", imlua_rgb2gray); + lua_register("imMap2Gray", imlua_map2gray); + lua_register("imVersion", imlua_version); + lua_register("imResize", imlua_resize); + lua_register("imStretch", imlua_stretch); + + /* creation and destruction functions */ + lua_register("imCreateImageRGB", imlua_createimagergb); + lua_register("imCreateImageMap", imlua_createimagemap); + lua_register("imCreatePalette", imlua_createpalette); + lua_register("imKillImageRGB", imlua_killimagergb); + lua_register("imKillImageMap", imlua_killimagemap); + lua_register("imKillPalette", imlua_killpalette); + + /* im constants */ + lua_pushnumber( IM_BMP); lua_setglobal("IM_BMP"); + lua_pushnumber( IM_PCX); lua_setglobal("IM_PCX"); + lua_pushnumber( IM_GIF); lua_setglobal("IM_GIF"); + lua_pushnumber( IM_TIF); lua_setglobal("IM_TIF"); + lua_pushnumber( IM_RAS); lua_setglobal("IM_RAS"); + lua_pushnumber( IM_SGI); lua_setglobal("IM_SGI"); + lua_pushnumber( IM_JPG); lua_setglobal("IM_JPG"); + lua_pushnumber( IM_LED); lua_setglobal("IM_LED"); + lua_pushnumber( IM_TGA); lua_setglobal("IM_TGA"); + + lua_pushnumber( 0); lua_setglobal("IM_NONE"); + lua_pushnumber( 1); lua_setglobal("IM_DEFAULT"); + lua_pushnumber( 2); lua_setglobal("IM_COMPRESSED"); + + lua_pushnumber( IM_RGB); lua_setglobal("IM_RGB"); + lua_pushnumber( IM_MAP); lua_setglobal("IM_MAP"); + + lua_pushnumber( IM_ERR_NONE); lua_setglobal("IM_ERR_NONE"); + lua_pushnumber( IM_ERR_OPEN); lua_setglobal("IM_ERR_OPEN"); + lua_pushnumber( IM_ERR_READ); lua_setglobal("IM_ERR_READ"); + lua_pushnumber( IM_ERR_WRITE); lua_setglobal("IM_ERR_WRITE"); + lua_pushnumber( IM_ERR_FORMAT); lua_setglobal("IM_ERR_FORMAT"); + lua_pushnumber( IM_ERR_TYPE); lua_setglobal("IM_ERR_TYPE"); + lua_pushnumber( IM_ERR_COMP); lua_setglobal("IM_ERR_COMP"); +} |