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pixelcache: allow specifying content type and extra size.

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Allow forcing the cairo_content_t of the surface as well as the
amount of extra size to render.

https://bugzilla.gnome.org/show_bug.cgi?id=706728
This commit is contained in:
Christian Hergert 2013-08-24 21:08:41 -07:00 committed by Alexander Larsson
parent 576ae1e3c9
commit b1745d68cd
2 changed files with 53 additions and 21 deletions
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47
gtk/gtkpixelcache.c
View File

@ -24,7 +24,7 @@
/* The extra size of the offscreen surface we allocate
to make scrolling more efficient */
#define EXTRA_SIZE 64
#define DEFAULT_EXTRA_SIZE 64
/* When resizing viewport to smaller we allow this extra
size to avoid constantly reallocating when resizing */
@ -32,6 +32,7 @@
struct _GtkPixelCache {
cairo_surface_t *surface;
cairo_content_t content;
/* Valid if surface != NULL */
int surface_x;
@ -44,6 +45,9 @@ struct _GtkPixelCache {
cairo_region_t *surface_dirty;
guint timeout_tag;
guint extra_width;
guint extra_height;
};
GtkPixelCache *
@ -52,6 +56,8 @@ _gtk_pixel_cache_new ()
GtkPixelCache *cache;
cache = g_new0 (GtkPixelCache, 1);
cache->extra_width = DEFAULT_EXTRA_SIZE;
cache->extra_height = DEFAULT_EXTRA_SIZE;
return cache;
}
@ -74,6 +80,23 @@ _gtk_pixel_cache_free (GtkPixelCache *cache)
g_free (cache);
}
void
_gtk_pixel_cache_set_extra_size (GtkPixelCache *cache,
guint extra_width,
guint extra_height)
{
cache->extra_width = extra_width ? extra_width : DEFAULT_EXTRA_SIZE;
cache->extra_height = extra_height ? extra_height : DEFAULT_EXTRA_SIZE;
}
void
_gtk_pixel_cache_set_content (GtkPixelCache *cache,
cairo_content_t content)
{
cache->content = content;
_gtk_pixel_cache_invalidate (cache, NULL);
}
/* Region is in canvas coordinates */
void
_gtk_pixel_cache_invalidate (GtkPixelCache *cache,
@ -138,21 +161,25 @@ _gtk_pixel_cache_create_surface_if_needed (GtkPixelCache *cache,
cairo_pattern_t *bg;
double red, green, blue, alpha;
content = CAIRO_CONTENT_COLOR_ALPHA;
bg = gdk_window_get_background_pattern (window);
if (bg != NULL &&
cairo_pattern_get_type (bg) == CAIRO_PATTERN_TYPE_SOLID &&
cairo_pattern_get_rgba (bg, &red, &green, &blue, &alpha) == CAIRO_STATUS_SUCCESS &&
alpha == 1.0)
content = CAIRO_CONTENT_COLOR;
content = cache->content;
if (!content)
{
content = CAIRO_CONTENT_COLOR_ALPHA;
bg = gdk_window_get_background_pattern (window);
if (bg != NULL &&
cairo_pattern_get_type (bg) == CAIRO_PATTERN_TYPE_SOLID &&
cairo_pattern_get_rgba (bg, &red, &green, &blue, &alpha) == CAIRO_STATUS_SUCCESS &&
alpha == 1.0)
content = CAIRO_CONTENT_COLOR;
}
surface_w = view_rect->width;
if (canvas_rect->width > surface_w)
surface_w = MIN (surface_w + EXTRA_SIZE, canvas_rect->width);
surface_w = MIN (surface_w + cache->extra_width, canvas_rect->width);
surface_h = view_rect->height;
if (canvas_rect->height > surface_h)
surface_h = MIN (surface_h + EXTRA_SIZE, canvas_rect->height);
surface_h = MIN (surface_h + cache->extra_height, canvas_rect->height);
/* If current surface can't fit view_rect or is too large, kill it */
if (cache->surface != NULL &&

27
gtk/gtkpixelcacheprivate.h
View File

@ -30,17 +30,22 @@ typedef struct _GtkPixelCache GtkPixelCache;
typedef void (*GtkPixelCacheDrawFunc) (cairo_t *cr,
gpointer user_data);
GtkPixelCache *_gtk_pixel_cache_new (void);
void _gtk_pixel_cache_free (GtkPixelCache *cache);
void _gtk_pixel_cache_invalidate (GtkPixelCache *cache,
cairo_region_t *region);
void _gtk_pixel_cache_draw (GtkPixelCache *cache,
cairo_t *cr,
GdkWindow *window,
cairo_rectangle_int_t *view_rect,
cairo_rectangle_int_t *canvas_rect,
GtkPixelCacheDrawFunc draw,
gpointer user_data);
GtkPixelCache *_gtk_pixel_cache_new (void);
void _gtk_pixel_cache_free (GtkPixelCache *cache);
void _gtk_pixel_cache_invalidate (GtkPixelCache *cache,
cairo_region_t *region);
void _gtk_pixel_cache_draw (GtkPixelCache *cache,
cairo_t *cr,
GdkWindow *window,
cairo_rectangle_int_t *view_rect,
cairo_rectangle_int_t *canvas_rect,
GtkPixelCacheDrawFunc draw,
gpointer user_data);
void _gtk_pixel_cache_set_extra_size (GtkPixelCache *cache,
guint extra_width,
guint extra_height);
void _gtk_pixel_cache_set_content (GtkPixelCache *cache,
cairo_content_t content);
G_END_DECLS