void
_cairo_gl_context_set_destination (cairo_gl_context_t *ctx,
cairo_gl_surface_t *surface,
cairo_bool_t multisampling)
{
/* OpenGL ES surfaces are always in MSAA mode once it's been turned on,
* so we don't need to check whether we are switching modes for that
* surface type. */
if (ctx->current_target == surface && ! surface->needs_update &&
(ctx->gl_flavor == CAIRO_GL_FLAVOR_ES ||
surface->msaa_active == multisampling))
return;
_cairo_gl_composite_flush (ctx);
ctx->current_target = surface;
surface->needs_update = FALSE;
if (_cairo_gl_surface_is_texture (surface)) {
if (ctx->gl_flavor == CAIRO_GL_FLAVOR_ES) {
_cairo_gl_ensure_framebuffer (ctx, surface);
ctx->dispatch.BindFramebuffer (GL_FRAMEBUFFER, surface->fb);
#if CAIRO_HAS_GL_SURFACE
} else if (multisampling)
_cairo_gl_activate_surface_as_multisampling (ctx, surface);
else {
_cairo_gl_activate_surface_as_nonmultisampling (ctx, surface);
#endif
}
} else {
ctx->make_current (ctx, surface);
#if CAIRO_HAS_GL_SURFACE
if (multisampling)
glEnable(GL_MULTISAMPLE);
else
glDisable(GL_MULTISAMPLE);
#endif
ctx->dispatch.BindFramebuffer (GL_FRAMEBUFFER, 0);
#if CAIRO_HAS_GL_SURFACE
glDrawBuffer (GL_BACK_LEFT);
glReadBuffer (GL_BACK_LEFT);
#endif
}
glViewport (0, 0, surface->width, surface->height);
if (_cairo_gl_surface_is_texture (surface))
_gl_identity_ortho (ctx->modelviewprojection_matrix,
0, surface->width, 0, surface->height);
else
_gl_identity_ortho (ctx->modelviewprojection_matrix,
0, surface->width, surface->height, 0);
}
void
_cairo_gl_context_set_destination (cairo_gl_context_t *ctx,
cairo_gl_surface_t *surface,
cairo_bool_t multisampling)
{
cairo_bool_t changing_surface, changing_sampling;
/* The decision whether or not to use multisampling happens when
* we create an OpenGL ES surface, so we can never switch modes. */
if (ctx->gl_flavor == CAIRO_GL_FLAVOR_ES)
multisampling = surface->msaa_active;
changing_surface = ctx->current_target != surface || surface->needs_update;
changing_sampling = surface->msaa_active != multisampling;
if (! changing_surface && ! changing_sampling)
return;
if (! changing_surface) {
_cairo_gl_composite_flush (ctx);
_cairo_gl_context_bind_framebuffer (ctx, surface, multisampling);
return;
}
_cairo_gl_composite_flush (ctx);
ctx->current_target = surface;
surface->needs_update = FALSE;
if (! _cairo_gl_surface_is_texture (surface)) {
ctx->make_current (ctx, surface);
}
_cairo_gl_context_bind_framebuffer (ctx, surface, multisampling);
if (! _cairo_gl_surface_is_texture (surface)) {
#if CAIRO_HAS_GL_SURFACE
glDrawBuffer (GL_BACK_LEFT);
glReadBuffer (GL_BACK_LEFT);
#endif
}
glDisable (GL_DITHER);
glViewport (0, 0, surface->width, surface->height);
if (_cairo_gl_surface_is_texture (surface))
_gl_identity_ortho (ctx->modelviewprojection_matrix,
0, surface->width, 0, surface->height);
else
_gl_identity_ortho (ctx->modelviewprojection_matrix,
0, surface->width, surface->height, 0);
}
