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gl renderer: Add a helper function

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We'll use this for the common case of a color matrix node inside a
shadow node.
This commit is contained in:
Timm Bäder 2017-12-06 16:07:18 +01:00
parent 49785974cf
commit 98ba28b5d7
1 changed files with 17 additions and 0 deletions
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17
gsk/gl/gskglrenderer.c
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@ -144,6 +144,23 @@ sort_border_sides (const GdkRGBA *colors,
}
}
static inline gboolean
color_matrix_modifies_alpha (GskRenderNode *node)
{
const graphene_matrix_t *matrix = gsk_color_matrix_node_peek_color_matrix (node);
const graphene_vec4_t *offset = gsk_color_matrix_node_peek_color_offset (node);
graphene_vec4_t row3;
graphene_vec4_t id_row3;
if (graphene_vec4_get_w (offset) != 0.0f)
return TRUE;
graphene_vec4_init (&id_row3, 0, 0, 0, 1);
graphene_matrix_get_row (matrix, 3, &row3);
return !graphene_vec4_equal (&id_row3, &row3);
}
static void gsk_gl_renderer_setup_render_mode (GskGLRenderer *self);
static void add_offscreen_ops (GskGLRenderer *self,
RenderOpBuilder *builder,