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gl renderer: Render recording surface untransformed

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Cairo can't handle the y flip apparently.

Fixes #1906
This commit is contained in:
Timm Bäder
2019-05-21 08:38:11 +02:00
parent 3f1afd6040
commit fcfc2ca518
1 changed files with 25 additions and 3 deletions
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28
gsk/gl/gskglrenderer.c
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@@ -440,6 +440,7 @@ render_fallback_node (GskGLRenderer *self,
const int surface_width = ceilf (node->bounds.size.width) * scale;
const int surface_height = ceilf (node->bounds.size.height) * scale;
cairo_surface_t *surface;
cairo_surface_t *rendered_surface;
cairo_t *cr;
int cached_id;
int texture_id;
@@ -468,6 +469,25 @@ render_fallback_node (GskGLRenderer *self,
return;
}
/* We first draw the recording surface on an image surface,
* just because the scaleY(-1) later otherwise screws up the
* rendering... */
{
rendered_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
surface_width,
surface_height);
cairo_surface_set_device_scale (rendered_surface, scale, scale);
cr = cairo_create (rendered_surface);
cairo_save (cr);
cairo_translate (cr, -node->bounds.origin.x, -node->bounds.origin.y);
gsk_render_node_draw (node, cr);
cairo_restore (cr);
cairo_destroy (cr);
}
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
surface_width,
surface_height);
@@ -477,8 +497,10 @@ render_fallback_node (GskGLRenderer *self,
/* We draw upside down here, so it matches what GL does. */
cairo_save (cr);
cairo_scale (cr, 1, -1);
cairo_translate (cr, -node->bounds.origin.x, ceilf (-node->bounds.origin.y - node->bounds.size.height));
gsk_render_node_draw (node, cr);
cairo_translate (cr, 0, -surface_height);
cairo_set_source_surface (cr, rendered_surface, 0, 0);
cairo_rectangle (cr, 0, 0, surface_width, surface_height);
cairo_fill (cr);
cairo_restore (cr);
#if HIGHLIGHT_FALLBACK
@@ -504,8 +526,8 @@ render_fallback_node (GskGLRenderer *self,
gdk_gl_context_label_object_printf (self->gl_context, GL_TEXTURE, texture_id,
"Fallback %s %d", node->node_class->type_name, texture_id);
cairo_surface_destroy (surface);
cairo_surface_destroy (rendered_surface);
gsk_gl_driver_set_texture_for_pointer (self->gl_driver, node, texture_id);