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image: add rotate and crop methods 

Signed-off-by: Julien Danjou <julien@danjou.info>
This commit is contained in:
Julien Danjou 2008-09-17 17:47:28 +02:00
parent c8f58d7868
commit 8c23043cae
1 changed files with 55 additions and 0 deletions
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55
image.c
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@ -171,6 +171,59 @@ luaA_image_new(lua_State *L)
return 0;
}
/** Rotate an image with specified angle radians and return a new image.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lvalue An image.
* \lparam The angle in radians.
* \lreturn A rotated image.
*/
static int
luaA_image_rotate(lua_State *L)
{
image_t **image = luaA_checkudata(L, 1, "image"), *new;
double angle = luaL_checknumber(L, 2);
new = p_new(image_t, 1);
imlib_context_set_image((*image)->image);
new->image = imlib_create_rotated_image(angle);
image_compute(new);
return luaA_image_userdata_new(L, new);
}
/** Crop an image to the given rectangle.
* \return The number of elements pushed on stack.
* \luastack
* \lvalue An image.
* \lparam The top left x coordinate of the rectangle.
* \lparam The top left y coordinate of the rectangle.
* \lparam The width of the rectangle.
* \lparam The height of the rectangle.
* \lreturn A cropped image.
*/
static int
luaA_image_crop(lua_State *L)
{
image_t **image = luaA_checkudata(L, 1, "image"), *new;
int x = luaL_checkint(L, 2);
int y = luaL_checkint(L, 3);
int w = luaL_checkint(L, 4);
int h = luaL_checkint(L, 5);
new = p_new(image_t, 1);
imlib_context_set_image((*image)->image);
new->image = imlib_create_cropped_image(x, y, w, h);
image_compute(new);
return luaA_image_userdata_new(L, new);
}
/** Return a formated string for an image.
* \param L The Lua VM state.
* \luastack
@ -193,6 +246,8 @@ const struct luaL_reg awesome_image_methods[] =
};
const struct luaL_reg awesome_image_meta[] =
{
{ "rotate", luaA_image_rotate },
{ "crop", luaA_image_crop },
{ "__gc", luaA_image_gc },
{ "__eq", luaA_image_eq },
{ "__tostring", luaA_image_tostring },