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background: downscale background to fit in texture limits

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Some cards have 2k texture limits, which can be smaller than
commonly sized backgrounds.

This commit downscales the background in this situation, so that
it won't fail to load.

https://bugzilla.gnome.org/show_bug.cgi?id=702283
This commit is contained in:
Ray Strode 2013-06-14 16:11:30 -04:00
parent 2103ff6a5c
commit 15e01152da
1 changed files with 30 additions and 0 deletions
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30
src/compositor/meta-background.c
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@ -32,6 +32,8 @@
#include <clutter/clutter.h>
#include <GL/gl.h>
#include "cogl-utils.h"
#include "compositor-private.h"
#include "mutter-enum-types.h"
@ -971,6 +973,7 @@ load_file (GTask *task,
{
GError *error = NULL;
GdkPixbuf *pixbuf;
int max_texture_size = 0;
pixbuf = gdk_pixbuf_new_from_file (task_data->filename,
&error);
@ -981,6 +984,33 @@ load_file (GTask *task,
return;
}
glGetIntegerv (GL_MAX_TEXTURE_SIZE, &max_texture_size);
if (glGetError () != GL_NO_ERROR)
max_texture_size = 0;
if (max_texture_size > 0) {
double width, height;
width = gdk_pixbuf_get_width (pixbuf);
height = gdk_pixbuf_get_height (pixbuf);
if (width > max_texture_size || height > max_texture_size) {
GdkPixbuf *scaled_pixbuf;
if (width > height) {
width = max_texture_size;
height *= max_texture_size / width;
} else {
width *= max_texture_size / height;
height = max_texture_size;
}
scaled_pixbuf = gdk_pixbuf_scale_simple (pixbuf, width, height, GDK_INTERP_BILINEAR);
g_object_unref (pixbuf);
pixbuf = scaled_pixbuf;
}
}
g_task_return_pointer (task, pixbuf, (GDestroyNotify) g_object_unref);
}