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GtkPixelCache: Add debug feature to track redraws

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Each time we redraw we tint it in a different color so that
you can see which regions are redrawn.
This commit is contained in:
Alexander Larsson 2013-05-02 11:47:06 +02:00
parent 30dc399b72
commit dde714386d
3 changed files with 25 additions and 2 deletions
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3
gtk/gtkdebug.h
View File

@ -49,7 +49,8 @@ typedef enum {
GTK_DEBUG_BUILDER = 1 << 11,
GTK_DEBUG_SIZE_REQUEST = 1 << 12,
GTK_DEBUG_NO_CSS_CACHE = 1 << 13,
GTK_DEBUG_BASELINES = 1 << 14
GTK_DEBUG_BASELINES = 1 << 14,
GTK_DEBUG_PIXEL_CACHE = 1 << 15
} GtkDebugFlag;
#ifdef G_ENABLE_DEBUG

3
gtk/gtkmain.c
View File

@ -172,7 +172,8 @@ static const GDebugKey gtk_debug_keys[] = {
{"builder", GTK_DEBUG_BUILDER},
{"size-request", GTK_DEBUG_SIZE_REQUEST},
{"no-css-cache", GTK_DEBUG_NO_CSS_CACHE},
{"baselines", GTK_DEBUG_BASELINES}
{"baselines", GTK_DEBUG_BASELINES},
{"pixel-cache", GTK_DEBUG_PIXEL_CACHE}
};
#endif /* G_ENABLE_DEBUG */

21
gtk/gtkpixelcache.c
View File

@ -17,6 +17,7 @@
#include "config.h"
#include "gtkdebug.h"
#include "gtkpixelcacheprivate.h"
/* The extra size of the offscreen surface we allocate
@ -289,7 +290,27 @@ _gtk_pixel_cache_repaint (GtkPixelCache *cache,
cairo_set_operator (backing_cr, CAIRO_OPERATOR_OVER);
cairo_save (backing_cr);
draw (backing_cr, user_data);
cairo_restore (backing_cr);
#ifdef G_ENABLE_DEBUG
if (gtk_get_debug_flags () & GTK_DEBUG_PIXEL_CACHE)
{
GdkRGBA colors[] = {
{ 1, 0, 0, 0.08},
{ 0, 1, 0, 0.08},
{ 0, 0, 1, 0.08},
{ 1, 0, 1, 0.08},
{ 1, 1, 0, 0.08},
{ 0, 1, 1, 0.08},
};
static int current_color = 0;
gdk_cairo_set_source_rgba (backing_cr, &colors[(current_color++) % G_N_ELEMENTS (colors)]);
cairo_paint (backing_cr);
}
#endif
cairo_destroy (backing_cr);
}