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line-visualizer-row: handle HiDPI properly

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When we find ourselves on a HiDPI display, we need to make sure
we setup the device scale factor properly and adjust our render
checks for valid surface sizes.
This commit is contained in:
Christian Hergert
2016-09-29 18:10:29 -07:00
parent 75332678a6
commit 4bd72708d7
1 changed files with 12 additions and 4 deletions
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16
lib/sp-line-visualizer-row.c
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@ -91,6 +91,7 @@ typedef struct
PointCache *cache;
GArray *lines;
GdkRGBA color;
gint scale_factor;
gint width;
gint height;
} RenderData;
@ -267,11 +268,12 @@ sp_line_visualizer_row_draw (GtkWidget *widget,
if (ret == GDK_EVENT_PROPAGATE && priv->surface != NULL)
{
gint scale_factor = gtk_widget_get_scale_factor (widget);
gint width;
gint height;
width = cairo_image_surface_get_width (priv->surface);
height = cairo_image_surface_get_height (priv->surface);
width = cairo_image_surface_get_width (priv->surface) / scale_factor;
height = cairo_image_surface_get_height (priv->surface) / scale_factor;
/*
* We must have another threaded draw queued, so to give the impression
@ -861,8 +863,8 @@ sp_line_visualizer_row_render_worker (GTask *task,
* and ignore having to deal with backgrounds and such.
*/
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
render->width,
render->height);
render->width * render->scale_factor,
render->height * render->scale_factor);
if (surface == NULL)
{
@ -874,6 +876,11 @@ sp_line_visualizer_row_render_worker (GTask *task,
goto cleanup;
}
if (render->scale_factor != 1)
cairo_surface_set_device_scale (surface,
render->scale_factor,
render->scale_factor);
cr = cairo_create (surface);
if (cr == NULL)
@ -990,6 +997,7 @@ sp_line_visualizer_row_render_async (SpLineVisualizerRow *self,
render->lines = copy_array (priv->lines);
render->width = alloc.width;
render->height = alloc.height;
render->scale_factor = gtk_widget_get_scale_factor (GTK_WIDGET (self));
style_context = gtk_widget_get_style_context (GTK_WIDGET (self));
state = gtk_widget_get_state_flags (GTK_WIDGET (self));