diff options
Diffstat (limited to 'src/cairo-gl-device.c')
| -rw-r--r-- | src/cairo-gl-device.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/cairo-gl-device.c b/src/cairo-gl-device.c index b98c76930..827d50b76 100644 --- a/src/cairo-gl-device.c +++ b/src/cairo-gl-device.c @@ -1106,14 +1106,18 @@ cairo_gl_device_set_thread_aware (cairo_device_t *device, void _cairo_gl_context_reset (cairo_gl_context_t *ctx) { cairo_gl_shader_t *shader = ctx->current_shader; + GLint current_program; + /* reset current shader, this is because if cairo shares a same * context other extern libraries or applications, the current * program may well be changed, in this case, we must set cairo * to use cairo program */ - ctx->current_shader = NULL; - if (shader) - _cairo_gl_set_shader (ctx, shader); + if (shader) { + ctx->dispatch.GetIntegerv (GL_CURRENT_PROGRAM, ¤t_program); + if ((GLint)(ctx->current_shader->program) != current_program) + _cairo_gl_set_shader (ctx, shader); + } ctx->states_cache.viewport_box.width = 0; ctx->states_cache.viewport_box.height = 0; |