diff options
Diffstat (limited to 'src/glamor_render.c')
| -rw-r--r-- | src/glamor_render.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/src/glamor_render.c b/src/glamor_render.c index 5e5ae78..b82c7c3 100644 --- a/src/glamor_render.c +++ b/src/glamor_render.c @@ -724,10 +724,17 @@ glamor_setup_composite_vbo(ScreenPtr screen, int n_verts) glamor_screen_private *glamor_priv = glamor_get_screen_private(screen); glamor_gl_dispatch *dispatch; + int vert_size; + Bool need_new_buffer = FALSE; glamor_priv->vbo_offset = 0; glamor_priv->render_nr_verts = 0; - glamor_priv->vbo_size = n_verts * sizeof(float) * 2; + vert_size = n_verts * sizeof(float) * 2; + + if (glamor_priv->vbo_size < vert_size) { + glamor_priv->vbo_size = vert_size; + need_new_buffer = TRUE; + } glamor_priv->vb_stride = 2 * sizeof(float); if (glamor_priv->has_source_coords) @@ -738,10 +745,14 @@ glamor_setup_composite_vbo(ScreenPtr screen, int n_verts) dispatch = glamor_get_dispatch(glamor_priv); dispatch->glBindBuffer(GL_ARRAY_BUFFER, glamor_priv->vbo); if (glamor_priv->gl_flavor == GLAMOR_GL_DESKTOP) { - dispatch->glBufferData(GL_ARRAY_BUFFER, - n_verts * sizeof(float) * 2, - NULL, GL_DYNAMIC_DRAW); - glamor_priv->vb = dispatch->glMapBuffer(GL_ARRAY_BUFFER, GL_READ_WRITE); + if (need_new_buffer) + dispatch->glBufferData(GL_ARRAY_BUFFER, + vert_size, + NULL, GL_DYNAMIC_DRAW); + glamor_priv->vb = dispatch->glMapBufferRange(GL_ARRAY_BUFFER, 0, + vert_size, + GL_MAP_READ_BIT | GL_MAP_WRITE_BIT); + assert(glamor_priv->vb != NULL); } dispatch->glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, glamor_priv->ebo); |