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ClutterStageView: Always blit full texture on full onscreen framebuffer

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When blitting an offscreen onto an onscreen, the whole offscreen should
always be drawn on the whole onscreen. Thus, don't try to convert
between coordinate spaces, just draw the whole offscreen on the whole
onscreen.

https://bugzilla.gnome.org/show_bug.cgi?id=770672
This commit is contained in:
Jonas Ådahl 2016-09-09 12:51:14 +08:00
parent e1516e4f31
commit b78b8c9578
1 changed files with 3 additions and 43 deletions
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46
clutter/clutter/clutter-stage-view.c
View File

@ -115,36 +115,12 @@ clutter_stage_view_invalidate_offscreen_blit_pipeline (ClutterStageView *view)
g_clear_pointer (&priv->pipeline, cogl_object_unref);
}
static void
transform_rect_to_onscreen (ClutterStageView *view,
const cairo_rectangle_t *rect,
cairo_rectangle_t *rect_out)
{
float x1, y1, x2, y2;
x1 = rect->x;
y1 = rect->y;
clutter_stage_view_transform_to_onscreen (view, &x1, &y1);
x2 = rect->x + rect->width;
y2 = rect->y + rect->height;
clutter_stage_view_transform_to_onscreen (view, &x2, &y2);
*rect_out = (cairo_rectangle_t) {
.x = MIN (x1, x2),
.y = MIN (y1, y2),
.width = ABS (x2 - x1),
.height = ABS (y2 - y1)
};
}
void
clutter_stage_view_blit_offscreen (ClutterStageView *view,
const cairo_rectangle_int_t *rect)
{
ClutterStageViewPrivate *priv =
clutter_stage_view_get_instance_private (view);
cairo_rectangle_t texture_rect, onscreen_rect;
CoglMatrix matrix;
clutter_stage_view_ensure_offscreen_blit_pipeline (view);
@ -158,25 +134,9 @@ clutter_stage_view_blit_offscreen (ClutterStageView *view,
cogl_matrix_scale (&matrix, 2, -2, 0);
cogl_framebuffer_set_projection_matrix (priv->framebuffer, &matrix);
texture_rect = (cairo_rectangle_t) {
.x = (double) rect->x / cogl_framebuffer_get_width (priv->offscreen),
.y = (double) rect->y / cogl_framebuffer_get_height (priv->offscreen),
.width = (double) rect->width / cogl_framebuffer_get_width (priv->offscreen),
.height = (double) rect->height / cogl_framebuffer_get_height (priv->offscreen)
};
transform_rect_to_onscreen (view, &texture_rect, &onscreen_rect);
cogl_framebuffer_draw_textured_rectangle (priv->framebuffer,
priv->pipeline,
onscreen_rect.x,
onscreen_rect.y,
onscreen_rect.x + onscreen_rect.width,
onscreen_rect.y + onscreen_rect.height,
texture_rect.x,
texture_rect.y,
texture_rect.x + texture_rect.width,
texture_rect.y + texture_rect.height);
cogl_framebuffer_draw_rectangle (priv->framebuffer,
priv->pipeline,
0, 0, 1, 1);
cogl_framebuffer_pop_matrix (priv->framebuffer);
}