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duplexvisualizer: minimal GTK 4 port

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This should be rewritten to draw offscreen and then upload textures as
necessary to the GPU for blitting.
This commit is contained in:
Christian Hergert
2021-09-30 16:20:53 -07:00
parent 52e6727beb
commit c35e109958
1 changed files with 24 additions and 14 deletions
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38
src/libsysprof-ui/sysprof-duplex-visualizer.c
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@ -296,35 +296,37 @@ sysprof_duplex_visualizer_set_reader (SysprofVisualizer *visualizer,
g_task_run_in_thread (task, sysprof_duplex_visualizer_worker);
}
static gboolean
sysprof_duplex_visualizer_draw (GtkWidget *widget,
cairo_t *cr)
static void
sysprof_duplex_visualizer_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
static const gdouble dashes[] = { 1.0, 2.0 };
SysprofDuplexVisualizer *self = (SysprofDuplexVisualizer *)widget;
PangoFontDescription *font_desc;
GtkStyleContext *style_context;
PangoLayout *layout;
cairo_t *cr;
GtkAllocation alloc;
GdkRectangle clip;
gboolean ret;
GdkRGBA fg;
guint mid;
g_assert (SYSPROF_IS_DUPLEX_VISUALIZER (self));
g_assert (cr != NULL);
g_assert (snapshot != NULL);
/* FIXME: This should all be drawn offscreen and then drawn to the snapshot
* using GdkMemoryTexture so that we can avoid extra GPU uploads.
*/
gtk_widget_get_allocation (widget, &alloc);
gdk_cairo_get_clip_rectangle (cr, &clip);
mid = alloc.height / 2;
ret = GTK_WIDGET_CLASS (sysprof_duplex_visualizer_parent_class)->draw (widget, cr);
GTK_WIDGET_CLASS (sysprof_duplex_visualizer_parent_class)->snapshot (widget, snapshot);
cr = gtk_snapshot_append_cairo (snapshot, &GRAPHENE_RECT_INIT (0, 0, alloc.width, alloc.height));
style_context = gtk_widget_get_style_context (widget);
gtk_style_context_get_color (style_context,
gtk_style_context_get_state (style_context),
&fg);
gtk_style_context_get_color (style_context, &fg);
fg.alpha *= 0.4;
/* Draw our center line */
@ -366,6 +368,7 @@ sysprof_duplex_visualizer_draw (GtkWidget *widget,
n_fpoints);
/* Skip past data that we won't see anyway */
#if 0
for (p = 0; p < n_fpoints; p++)
{
if (points[p].x >= clip.x)
@ -373,7 +376,8 @@ sysprof_duplex_visualizer_draw (GtkWidget *widget,
}
if (p >= n_fpoints)
return ret;
return;
#endif
/* But get at least one data point to anchor out of view */
if (p > 0)
@ -398,8 +402,10 @@ sysprof_duplex_visualizer_draw (GtkWidget *widget,
last_x = points[i].x;
last_y = points[i].y;
#if 0
if (points[i].x > clip.x + clip.width)
break;
#endif
}
cairo_line_to (cr, last_x, mid);
@ -436,6 +442,7 @@ sysprof_duplex_visualizer_draw (GtkWidget *widget,
points,
n_fpoints);
#if 0
/* Skip past data that we won't see anyway */
for (p = 0; p < n_fpoints; p++)
{
@ -445,6 +452,7 @@ sysprof_duplex_visualizer_draw (GtkWidget *widget,
if (p >= n_fpoints)
return ret;
#endif
/* But get at least one data point to anchor out of view */
if (p > 0)
@ -469,8 +477,10 @@ sysprof_duplex_visualizer_draw (GtkWidget *widget,
last_x = points[i].x;
last_y = points[i].y;
#if 0
if (points[i].x > clip.x + clip.width)
break;
#endif
}
cairo_line_to (cr, last_x, mid);
@ -510,7 +520,7 @@ sysprof_duplex_visualizer_draw (GtkWidget *widget,
pango_font_description_free (font_desc);
g_object_unref (layout);
return ret;
cairo_destroy (cr);
}
static void
@ -534,7 +544,7 @@ sysprof_duplex_visualizer_class_init (SysprofDuplexVisualizerClass *klass)
object_class->finalize = sysprof_duplex_visualizer_finalize;
widget_class->draw = sysprof_duplex_visualizer_draw;
widget_class->snapshot = sysprof_duplex_visualizer_snapshot;
visualizer_class->set_reader = sysprof_duplex_visualizer_set_reader;
}