/* Apparently for mac, PBOs won't do an asynchronous transfer unless you use
* FBOs aong with glReadPixels, which is really dumb. */
void device_stage_texture(device_t device, stagesurf_t dst, texture_t src)
{
struct gs_texture_2d *tex2d = (struct gs_texture_2d*)src;
struct fbo_info *fbo;
GLint last_fbo;
bool success = false;
if (!can_stage(dst, tex2d))
goto failed;
if (!gl_bind_buffer(GL_PIXEL_PACK_BUFFER, dst->pack_buffer))
goto failed;
fbo = get_fbo(device, dst->width, dst->height, dst->format);
if (!gl_get_integer_v(GL_READ_FRAMEBUFFER_BINDING, &last_fbo))
goto failed_unbind_buffer;
if (!gl_bind_framebuffer(GL_READ_FRAMEBUFFER, fbo->fbo))
goto failed_unbind_buffer;
glFramebufferTexture2D(GL_READ_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + 0,
src->gl_target, src->texture, 0);
if (!gl_success("glFrameBufferTexture2D"))
goto failed_unbind_all;
glReadPixels(0, 0, dst->width, dst->height, dst->gl_format,
dst->gl_type, 0);
if (!gl_success("glReadPixels"))
goto failed_unbind_all;
success = true;
failed_unbind_all:
gl_bind_framebuffer(GL_READ_FRAMEBUFFER, last_fbo);
failed_unbind_buffer:
gl_bind_buffer(GL_PIXEL_PACK_BUFFER, 0);
failed:
if (!success)
blog(LOG_ERROR, "device_stage_texture (GL) failed");
}
static bool set_current_fbo(device_t device, struct fbo_info *fbo)
{
if (device->cur_fbo != fbo) {
GLuint fbo_obj = fbo ? fbo->fbo : 0;
if (!gl_bind_framebuffer(GL_DRAW_FRAMEBUFFER, fbo_obj))
return false;
}
device->cur_fbo = fbo;
return true;
}
static bool set_current_fbo(gs_device_t *device, struct fbo_info *fbo)
{
if (device->cur_fbo != fbo) {
GLuint fbo_obj = fbo ? fbo->fbo : 0;
if (!gl_bind_framebuffer(GL_DRAW_FRAMEBUFFER, fbo_obj))
return false;
if (device->cur_fbo) {
device->cur_fbo->cur_render_target = NULL;
device->cur_fbo->cur_zstencil_buffer = NULL;
}
}
device->cur_fbo = fbo;
return true;
}