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/*
See license.txt in the root of this project.
*/
/* For now just a simple conversion, like in the example module. */
# include "luametatex.h"
# include "lmtoptional.h"
typedef enum gmlib_NoiseType {
UniformNoise,
GaussianNoise,
MultiplicativeGaussianNoise,
ImpulseNoise,
LaplacianNoise,
PoissonNoise,
RandomNoise,
UndefinedNoise
} gmlib_NoiseType;
typedef struct gmlib_state_info {
int initialized;
int padding;
void (*gm_InitializeMagick) (
// void **argv
void *path
);
void (*gm_DestroyMagick) (
void
);
void * (*gm_NewMagickWand) (
void
);
void (*gm_DestroyMagickWand) (
void *wand
);
int (*gm_MagickReadImage) (
void *wand,
const char *name
);
int (*gm_MagickWriteImage) (
void *wand,
const char *name
);
int (*gm_MagickBlurImage) (
void *wand,
const double radius,
const double sigma
);
int (*gm_MagickAddNoiseImage) (
void *wand,
const gmlib_NoiseType noise_type
);
} gmlib_state_info;
static gmlib_state_info gmlib_state = {
.initialized = 0,
.padding = 0,
.gm_InitializeMagick = NULL,
.gm_DestroyMagick = NULL,
.gm_NewMagickWand = NULL,
.gm_DestroyMagickWand = NULL,
.gm_MagickReadImage = NULL,
.gm_MagickWriteImage = NULL,
.gm_MagickBlurImage = NULL,
.gm_MagickAddNoiseImage = NULL,
};
static int gmlib_initialize(lua_State * L) // todo: table
{
if (! gmlib_state.initialized) {
const char *filename1 = lua_tostring(L,1);
const char *filename2 = lua_tostring(L,2);
if (filename1) {
lmt_library lib = lmt_library_load(filename1);
gmlib_state.gm_InitializeMagick = lmt_library_find(lib, "InitializeMagick");
gmlib_state.gm_DestroyMagick = lmt_library_find(lib, "DestroyMagick");
gmlib_state.initialized = lmt_library_okay(lib);
}
if (gmlib_state.initialized && filename2) {
lmt_library lib = lmt_library_load(filename2);
gmlib_state.gm_NewMagickWand = lmt_library_find(lib, "NewMagickWand");
gmlib_state.gm_DestroyMagickWand = lmt_library_find(lib, "DestroyMagickWand");
gmlib_state.gm_MagickReadImage = lmt_library_find(lib, "MagickReadImage");
gmlib_state.gm_MagickWriteImage = lmt_library_find(lib, "MagickWriteImage");
gmlib_state.gm_MagickBlurImage = lmt_library_find(lib, "MagickBlurImage");
gmlib_state.gm_MagickAddNoiseImage = lmt_library_find(lib, "MagickAddNoiseImage");
gmlib_state.initialized = lmt_library_okay(lib);
}
}
lua_pushboolean(L, gmlib_state.initialized);
return 1;
}
/* We could have a callback for stdout and error. */
/* Somehow not in gm: (void) MagickImageCommand(image_info, arg_count, args, NULL, exception); */
static int gmlib_execute(lua_State * L)
{
if (gmlib_state.initialized) {
if (gmlib_state.initialized == 1) {
/* Once per run. */
gmlib_state.gm_InitializeMagick(NULL);
gmlib_state.initialized = 2;
}
if (lua_type(L, 1) == LUA_TTABLE) {
void *wand = NULL;
const char *inpname = NULL;
const char *outname = NULL;
lua_getfield(L, -1, "inputfile" ); inpname = luaL_optstring(L, -1, NULL); lua_pop(L, 1);
lua_getfield(L, -1, "outputfile"); outname = luaL_optstring(L, -1, NULL); lua_pop(L, 1);
/* gmlib_state.gm_InitializeMagick(NULL); */
wand = gmlib_state.gm_NewMagickWand();
if (wand) {
int state = gmlib_state.gm_MagickReadImage(wand, inpname); /* todo: check return status */
if (state) {
/* fun stuff */
if (lua_getfield(L, -1, "blur" ) == LUA_TTABLE) {
lua_getfield(L, -1, "radius");
lua_getfield(L, -2, "sigma");
gmlib_state.gm_MagickBlurImage(wand, lua_tonumber(L, -2), lua_tonumber(L, -1));
lua_pop(L, 3);
} else {
lua_pop(L, 1);
}
if (lua_getfield(L, -1, "noise" ) == LUA_TTABLE) {
lua_getfield(L, -1, "type");
gmlib_state.gm_MagickAddNoiseImage(wand, lua_tointeger(L, -1));
lua_pop(L, 2);
} else {
lua_pop(L, 1);
}
/* done */
state = gmlib_state.gm_MagickWriteImage(wand, outname); /* todo: check return status */
gmlib_state.gm_DestroyMagickWand(wand);
if (state) {
lua_pushboolean(L, 1);
return 1;
} else {
lua_pushboolean(L, 0);
lua_pushliteral(L, "possible write error");
return 2;
}
} else {
gmlib_state.gm_DestroyMagickWand(wand);
lua_pushboolean(L, 0);
lua_pushliteral(L, "possible read error");
return 2;
}
} else {
lua_pushboolean(L, 0);
lua_pushliteral(L, "possible memory issue");
return 2;
}
/* gmlib_state.gm_DestroyMagick(); */
} else {
lua_pushboolean(L, 0);
lua_pushliteral(L, "invalid specification");
return 2;
}
}
lua_pushboolean(L, 0);
lua_pushliteral(L, "not initialized");
return 2;
}
static struct luaL_Reg gmlib_function_list[] = {
{ "initialize", gmlib_initialize },
{ "execute", gmlib_execute },
{ NULL, NULL },
};
int luaopen_graphicsmagick(lua_State * L)
{
lmt_library_register(L, "graphicsmagick", gmlib_function_list);
return 0;
}
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