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libsysprof-gtk: move some math to the GPU

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We can at least do the subtraction on the GPU by setting up the
transformation instead of on every data point.

It would be nice to do the rect as well but it looks like we might get
culled do to the rect width.
This commit is contained in:
Christian Hergert
2023-06-20 15:46:21 -07:00
parent 985bd35221
commit 5403f0335f
1 changed files with 9 additions and 1 deletions
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10
src/libsysprof-gtk/sysprof-column-layer.c
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@ -48,6 +48,7 @@ sysprof_column_layer_snapshot (GtkWidget *widget,
{
SysprofColumnLayer *self = (SysprofColumnLayer *)widget;
const SysprofXYSeriesValue *values;
graphene_matrix_t flip_y;
guint n_values;
double min_x, max_x;
int line_width;
@ -67,6 +68,11 @@ sysprof_column_layer_snapshot (GtkWidget *widget,
!(values = sysprof_xy_series_get_values (self->series, &n_values)))
return;
gtk_snapshot_save (snapshot);
graphene_matrix_init_from_2d (&flip_y, 1, 0, 0, -1, 0, height);
gtk_snapshot_transform_matrix (snapshot, &flip_y);
sysprof_xy_series_get_range (self->series, &min_x, NULL, &max_x, NULL);
/* NOTE: We might want to allow setting a "bucket size" for the
@ -85,10 +91,12 @@ sysprof_column_layer_snapshot (GtkWidget *widget,
gtk_snapshot_append_color (snapshot,
&self->color,
&GRAPHENE_RECT_INIT (v->x * width,
height - line_height,
0,
line_width,
line_height));
}
gtk_snapshot_restore (snapshot);
}
static const SysprofXYSeriesValue *