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image: add insert function to combine two images 

Signed-off-by: Gregor Best <farhaven@googlemail.com>
Signed-off-by: Julien Danjou <julien@danjou.info>
This commit is contained in:
Gregor Best 2009-05-27 15:14:47 +02:00 committed by Julien Danjou
parent 1f3fdce144
commit 88dd246537
1 changed files with 53 additions and 0 deletions
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53
image.c
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@ -510,6 +510,58 @@ luaA_image_save(lua_State *L)
return 0;
}
/** Insert one image into another.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
* \luastack
* \lvalue An image.
* \lparam The image to insert.
* \lparam The X offset of the image to insert (optional).
* \lparam The Y offset of the image to insert (optional).
* \lparam The horizontal offset of the upper right image corner (optional).
* \lparam The vertical offset of the upper right image corner (optional).
* \lparam The horizontal offset of the lower left image corner (optional).
* \lparam The vertical offset of the lower left image corner (optional).
* \lparam The X coordinate of the source rectangle (optional).
* \lparam The Y coordinate of the source rectangle (optional).
* \lparam The width of the source rectangle (optional).
* \lparam The height of the source rectangle (optional).
*/
static int
luaA_image_insert(lua_State *L)
{
image_t *image_target = luaL_checkudata(L, 1, "image");
image_t *image_source = luaL_checkudata(L, 2, "image");
int xoff = luaL_optnumber(L, 3, 0);
int yoff = luaL_optnumber(L, 4, 0);
int xsrc = luaL_optnumber(L, 5, 0);
int ysrc = luaL_optnumber(L, 6, 0);
int wsrc = luaL_optnumber(L, 7, image_source->width);
int hsrc = luaL_optnumber(L, 8, image_source->height);
int hxoff = luaL_optnumber(L, 9, image_source->width);
int hyoff = luaL_optnumber(L, 10, 0);
int vxoff = luaL_optnumber(L, 11, 0);
int vyoff = luaL_optnumber(L, 12, image_source->height);
imlib_context_set_image(image_target->image);
imlib_blend_image_onto_image_skewed(image_source->image, 0,
/* source rectangle */
xsrc, ysrc, wsrc, hsrc,
/* position of the source image in the target image */
xoff, yoff,
/* axis offsets for the source image, (w|0|0|h)
* is the default */
hxoff, hyoff, vxoff, vyoff);
image_compute(image_target);
return 0;
}
/** Image object.
* \param L The Lua VM state.
* \return The number of elements pushed on stack.
@ -563,6 +615,7 @@ const struct luaL_reg awesome_image_meta[] =
{ "crop", luaA_image_crop },
{ "crop_and_scale", luaA_image_crop_and_scale },
{ "save", luaA_image_save },
{ "insert", luaA_image_insert },
/* draw on images, whee! */
{ "draw_pixel", luaA_image_draw_pixel },
{ "draw_line", luaA_image_draw_line },