void agp_resize_rendertarget(
struct agp_rendertarget* tgt, size_t neww, size_t newh)
{
if (!tgt || !tgt->store){
arcan_warning("attempted resize on broken rendertarget\n");
return;
}
/* same dimensions, no need to resize */
if (tgt->store->w == neww && tgt->store->h == newh)
return;
erase_store(tgt->store);
erase_store(tgt->store_back);
struct agp_fenv* env = agp_env();
agp_empty_vstore(tgt->store, neww, newh);
if (tgt->store_back)
agp_empty_vstore(tgt->store_back, neww, newh);
/* we inplace- modify, want the refcounter intact */
env->delete_framebuffers(1,&tgt->fbo);
env->delete_renderbuffers(1,&tgt->depth);
tgt->fbo = GL_NONE;
tgt->depth = GL_NONE;
alloc_fbo(tgt, false);
}
void agp_resize_rendertarget(
struct agp_rendertarget* tgt, size_t neww, size_t newh)
{
if (!tgt || !tgt->store){
arcan_warning("attempted resize on broken rendertarget\n");
return;
}
/* same dimensions, no need to resize */
if (tgt->store->w == neww && tgt->store->h == newh)
return;
struct storage_info_t* os = tgt->store;
/* we inplace- modify, want the refcounter intact */
agp_null_vstore(os);
arcan_mem_free(os->vinf.text.raw);
os->vinf.text.raw = NULL;
os->vinf.text.s_raw = 0;
agp_empty_vstore(os, neww, newh);
glDeleteFramebuffers(1,&tgt->fbo);
glDeleteRenderbuffers(1,&tgt->depth);
tgt->fbo = GL_NONE;
tgt->depth = GL_NONE;
alloc_fbo(tgt, tgt->mode);
}
struct agp_rendertarget* agp_setup_rendertarget(struct storage_info_t* vstore,
enum rendertarget_mode m)
{
struct agp_rendertarget* r = arcan_alloc_mem(sizeof(struct agp_rendertarget),
ARCAN_MEM_VSTRUCT, ARCAN_MEM_BZERO, ARCAN_MEMALIGN_NATURAL);
r->store = vstore;
r->mode = m;
alloc_fbo(r, false);
return r;
}
struct agp_rendertarget* agp_setup_rendertarget(
struct storage_info_t* vstore, enum rendertarget_mode m)
{
struct agp_rendertarget* r = arcan_alloc_mem(sizeof(struct agp_rendertarget),
ARCAN_MEM_VSTRUCT, ARCAN_MEM_BZERO, ARCAN_MEMALIGN_NATURAL);
r->store = vstore;
r->mode = m;
r->clearcol[3] = 1.0;
/* need this tracking because there's no external memory management for _back */
r->front_active = true;
if (m & RENDERTARGET_DOUBLEBUFFER){
r->store_back = arcan_alloc_mem(sizeof(struct storage_info_t),
ARCAN_MEM_VSTRUCT, ARCAN_MEM_BZERO, ARCAN_MEMALIGN_NATURAL);
r->store_back->vinf.text.s_fmt = vstore->vinf.text.s_fmt;
r->store_back->vinf.text.d_fmt = vstore->vinf.text.d_fmt;
agp_empty_vstore(r->store_back, vstore->w, vstore->h);
}
alloc_fbo(r, false);
return r;
}
static bool alloc_fbo(struct agp_rendertarget* dst, bool retry)
{
struct agp_fenv* env = agp_env();
env->gen_framebuffers(1, &dst->fbo);
int mode = dst->mode & (~RENDERTARGET_DOUBLEBUFFER);
/* need both stencil and depth buffer, but we don't need the data from them */
env->bind_framebuffer(GL_FRAMEBUFFER, dst->fbo);
if (mode > RENDERTARGET_DEPTH)
{
env->framebuffer_texture_2d(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, dst->store->vinf.text.glid, 0);
/* need a Z buffer in the offscreen rendering but don't want
* bo store it, so setup a renderbuffer */
if (mode > RENDERTARGET_COLOR){
env->gen_renderbuffers(1, &dst->depth);
/* could use GL_DEPTH_COMPONENT only if we'd know that there
* wouldn't be any clipping in the active rendertarget */
if (!retry){
env->bind_renderbuffer(GL_RENDERBUFFER, dst->depth);
env->renderbuffer_storage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8,
dst->store->w, dst->store->h);
env->bind_renderbuffer(GL_RENDERBUFFER, 0);
env->framebuffer_renderbuffer(GL_FRAMEBUFFER,
GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, dst->depth);
}
}
}
else {
/* DEPTH buffer only (shadowmapping, ...) convert the storage to
* contain a depth texture */
size_t w = dst->store->w;
size_t h = dst->store->h;
agp_drop_vstore(dst->store);
struct storage_info_t* store = dst->store;
memset(store, '\0', sizeof(struct storage_info_t));
store->txmapped = TXSTATE_DEPTH;
store->txu = ARCAN_VTEX_CLAMP;
store->txv = ARCAN_VTEX_CLAMP;
store->scale = ARCAN_VIMAGE_NOPOW2;
store->imageproc = IMAGEPROC_NORMAL;
store->filtermode = ARCAN_VFILTER_NONE;
store->refcount = 1;
store->w = w;
store->h = h;
/* generate ID etc. special path for TXSTATE_DEPTH */
agp_update_vstore(store, true);
env->draw_buffer(GL_NONE);
env->read_buffer(GL_NONE);
env->framebuffer_texture_2d(GL_FRAMEBUFFER,
GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, store->vinf.text.glid, 0);
}
/* basic error handling / status checking
* may be possible that we should cache this in the
* rendertarget and only call when / if something changes as
* it's not certain that drivers won't stall the pipeline on this */
GLenum status = env->check_framebuffer(GL_FRAMEBUFFER);
if (status != GL_FRAMEBUFFER_COMPLETE){
arcan_warning("FBO support broken, couldn't create basic FBO:\n");
switch(status){
case GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT:
if (!retry){
arcan_warning("\t Incomplete Attachment, attempting "
"simple framebuffer, this will likely break 3D and complex"
"clipping operations.\n");
return alloc_fbo(dst, true);
}
else
arcan_warning("\t Simple attachement broke as well "
"likely driver issue.\n");
break;
#ifdef GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS
case GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS:
arcan_warning("\t Not all attached buffers have "
"the same dimensions.\n");
break;
#endif
case GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT:
arcan_warning("\t One or several FBO attachment points are missing.\n");
break;
case GL_FRAMEBUFFER_UNSUPPORTED:
arcan_warning("\t Request formats combination unsupported.\n");
break;
}
if (dst->fbo != GL_NONE)
env->delete_framebuffers(1,&dst->fbo);
if (dst->depth != GL_NONE)
env->delete_renderbuffers(1,&dst->depth);
dst->fbo = dst->depth = GL_NONE;
return false;
}
env->bind_framebuffer(GL_FRAMEBUFFER, 0);
return true;
}