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Code Issues Releases Activity

Clip out imlib2 buffer properly.

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This commit is contained in:
Brenden Matthews 2009-05-24 13:47:44 -06:00
parent 06044bf7e5
commit 4bfd545d2f
1 changed files with 18 additions and 5 deletions
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23
src/imlib2.c
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@ -27,6 +27,7 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
struct image_list_s {
char name[DEFAULT_TEXT_BUFFER_SIZE];
@ -112,7 +113,7 @@ void cimlib_add_image(const char *args)
}
}
static void cimlib_draw_image(struct image_list_s *cur)
static void cimlib_draw_image(struct image_list_s *cur, int *clip_x, int *clip_y, int *clip_w, int *clip_h)
{
image = imlib_load_image(cur->name);
if (image) {
@ -130,22 +131,29 @@ static void cimlib_draw_image(struct image_list_s *cur)
cur->x, cur->y, cur->w, cur->h);
imlib_context_set_image(image);
imlib_free_image();
if (cur->x < *clip_x) *clip_x = cur->x;
if (cur->y < *clip_y) *clip_y = cur->y;
if (cur->w > *clip_w) *clip_w = cur->w;
if (cur->h > *clip_h) *clip_h = cur->h;
} else {
ERR("Unable to load image '%s'", cur->name);
}
}
static void cimlib_draw_all(void)
static void cimlib_draw_all(int *clip_x, int *clip_y, int *clip_w, int *clip_h)
{
struct image_list_s *cur = image_list_start;
while (cur) {
cimlib_draw_image(cur);
cimlib_draw_image(cur, clip_x, clip_y, clip_w, clip_h);
cur = cur->next;
}
}
void cimlib_render(int x, int y, int width, int height)
{
int clip_x = INT_MAX, clip_y = INT_MAX;
int clip_w = 0, clip_h = 0;
if (!image_list_start) return; /* are we actually drawing anything? */
/* take all the little rectangles to redraw and merge them into
* something sane for rendering */
@ -156,12 +164,17 @@ void cimlib_render(int x, int y, int width, int height)
/* we can blend stuff now */
imlib_context_set_blend(1);
cimlib_draw_all();
cimlib_draw_all(&clip_x, &clip_y, &clip_w, &clip_h);
/* set the buffer image as our current image */
imlib_context_set_image(buffer);
/* setup our clip rect */
if (clip_x == INT_MAX) clip_x = 0;
if (clip_y == INT_MAX) clip_y = 0;
/* render the image at 0, 0 */
imlib_render_image_on_drawable(x, y);
imlib_render_image_part_on_drawable_at_size(clip_x, clip_y, clip_w, clip_h, x, y, clip_w, clip_h);
/* don't need that temporary buffer image anymore */
imlib_free_image();
}