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/*
* Copyright © 2005 Novell, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Novell, Inc. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
* Novell, Inc. makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* NOVELL, INC. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
* NO EVENT SHALL NOVELL, INC. BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: David Reveman <davidr@novell.com>
*/
#ifdef HAVE_CONFIG_H
# include "../config.h"
#endif
#include "glitzint.h"
typedef struct _glitz_fbo_drawable {
glitz_drawable_t base;
glitz_drawable_t *other;
int width;
int height;
glitz_gl_uint_t fb;
glitz_gl_uint_t front;
glitz_gl_uint_t back;
glitz_gl_uint_t depth;
glitz_gl_uint_t stencil;
glitz_gl_uint_t front_texture;
glitz_gl_uint_t back_texture;
glitz_gl_enum_t internal_format;
} glitz_fbo_drawable_t;
static glitz_bool_t
_glitz_fbo_bind (glitz_fbo_drawable_t *drawable)
{
glitz_bool_t update = 0;
glitz_gl_enum_t status;
GLITZ_GL_DRAWABLE (drawable->other);
if (!drawable->fb)
{
gl->gen_framebuffers (1, &drawable->fb);
drawable->width = drawable->base.width;
drawable->height = drawable->base.height;
update = 1;
}
else if (drawable->width != drawable->base.width ||
drawable->height != drawable->base.height)
{
drawable->width = drawable->base.width;
drawable->height = drawable->base.height;
update = 1;
}
gl->bind_framebuffer (GLITZ_GL_FRAMEBUFFER, drawable->fb);
if (drawable->base.front &&
drawable->front_texture != drawable->base.front->texture.name)
{
gl->framebuffer_texture_2d (GLITZ_GL_FRAMEBUFFER,
GLITZ_GL_COLOR_ATTACHMENT0,
drawable->base.front->texture.target,
drawable->base.front->texture.name,
0);
drawable->front_texture = drawable->base.front->texture.name;
if (drawable->front)
{
gl->delete_renderbuffers (1, &drawable->front);
drawable->front = 0;
}
}
if (!drawable->front_texture && !drawable->front)
{
gl->gen_renderbuffers (1, &drawable->front);
gl->bind_renderbuffer (GLITZ_GL_RENDERBUFFER, drawable->front);
gl->renderbuffer_storage (GLITZ_GL_RENDERBUFFER,
drawable->internal_format,
drawable->base.width,
drawable->base.height);
gl->bind_renderbuffer (GLITZ_GL_RENDERBUFFER, 0);
gl->framebuffer_renderbuffer (GLITZ_GL_FRAMEBUFFER,
GLITZ_GL_COLOR_ATTACHMENT0,
GLITZ_GL_RENDERBUFFER,
drawable->front);
}
if (drawable->base.format->d.doublebuffer)
{
if (drawable->base.back &&
drawable->back_texture != drawable->base.back->texture.name)
{
gl->framebuffer_texture_2d (GLITZ_GL_FRAMEBUFFER,
GLITZ_GL_COLOR_ATTACHMENT1,
drawable->base.back->texture.target,
drawable->base.back->texture.name,
0);
drawable->back_texture = drawable->base.back->texture.name;
if (drawable->back)
{
gl->delete_renderbuffers (1, &drawable->back);
drawable->back = 0;
}
}
if (!drawable->back_texture && !drawable->back)
{
gl->gen_renderbuffers (1, &drawable->back);
gl->bind_renderbuffer (GLITZ_GL_RENDERBUFFER,
drawable->back);
gl->renderbuffer_storage (GLITZ_GL_RENDERBUFFER,
drawable->internal_format,
drawable->base.width,
drawable->base.height);
gl->bind_renderbuffer (GLITZ_GL_RENDERBUFFER, 0);
gl->framebuffer_renderbuffer (GLITZ_GL_FRAMEBUFFER,
GLITZ_GL_COLOR_ATTACHMENT1,
GLITZ_GL_RENDERBUFFER,
drawable->back);
}
}
if (update)
{
if (drawable->base.format->d.depth_size)
{
if (!drawable->depth)
gl->gen_renderbuffers (1, &drawable->depth);
gl->bind_renderbuffer (GLITZ_GL_RENDERBUFFER, drawable->depth);
gl->renderbuffer_storage (GLITZ_GL_RENDERBUFFER,
GLITZ_GL_DEPTH_COMPONENT,
drawable->base.width,
drawable->base.height);
gl->bind_renderbuffer (GLITZ_GL_RENDERBUFFER, 0);
gl->framebuffer_renderbuffer (GLITZ_GL_FRAMEBUFFER,
GLITZ_GL_DEPTH_ATTACHMENT,
GLITZ_GL_RENDERBUFFER,
drawable->depth);
}
if (drawable->base.format->d.stencil_size)
{
if (!drawable->stencil)
gl->gen_renderbuffers (1, &drawable->stencil);
gl->bind_renderbuffer (GLITZ_GL_RENDERBUFFER,
drawable->stencil);
gl->renderbuffer_storage (GLITZ_GL_RENDERBUFFER,
GLITZ_GL_STENCIL_INDEX,
drawable->base.width,
drawable->base.height);
gl->bind_renderbuffer (GLITZ_GL_RENDERBUFFER, 0);
gl->framebuffer_renderbuffer (GLITZ_GL_FRAMEBUFFER,
GLITZ_GL_STENCIL_ATTACHMENT,
GLITZ_GL_RENDERBUFFER,
drawable->stencil);
}
}
status = gl->check_framebuffer_status (GLITZ_GL_FRAMEBUFFER);
if (status == GLITZ_GL_FRAMEBUFFER_COMPLETE)
return 1;
return 0;
}
static void
_glitz_fbo_attach_notify (void *abstract_drawable,
glitz_surface_t *surface)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
glitz_texture_t *texture;
GLITZ_GL_DRAWABLE (drawable->other);
texture = &surface->texture;
if (!TEXTURE_ALLOCATED (texture))
{
drawable->other->backend->push_current (drawable->other, NULL,
GLITZ_ANY_CONTEXT_CURRENT,
NULL);
glitz_texture_allocate (gl, texture);
drawable->other->backend->pop_current (drawable->other);
if (!TEXTURE_ALLOCATED (texture))
return;
}
GLITZ_REGION_EMPTY (&surface->drawable_damage);
}
static void
_glitz_fbo_detach_notify (void *abstract_drawable,
glitz_surface_t *surface)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
if (surface->texture.name == drawable->front_texture ||
surface->texture.name == drawable->back_texture)
{
GLITZ_GL_DRAWABLE (drawable->other);
drawable->other->backend->push_current (drawable->other, NULL,
GLITZ_ANY_CONTEXT_CURRENT,
NULL);
gl->bind_framebuffer (GLITZ_GL_FRAMEBUFFER, drawable->fb);
if (surface->texture.name == drawable->front_texture)
{
gl->framebuffer_texture_2d (GLITZ_GL_FRAMEBUFFER,
GLITZ_GL_COLOR_ATTACHMENT0,
surface->texture.target,
0, 0);
drawable->front_texture = 0;
}
if (surface->texture.name == drawable->back_texture)
{
gl->framebuffer_texture_2d (GLITZ_GL_FRAMEBUFFER,
GLITZ_GL_COLOR_ATTACHMENT1,
surface->texture.target,
0, 0);
drawable->back_texture = 0;
}
gl->bind_framebuffer (GLITZ_GL_FRAMEBUFFER, 0);
surface->fb = 0;
drawable->other->backend->pop_current (drawable->other);
}
}
static glitz_bool_t
_glitz_fbo_push_current (void *abstract_drawable,
glitz_surface_t *surface,
glitz_constraint_t constraint,
glitz_bool_t *restore_state)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
drawable->other->backend->push_current (drawable->other, surface,
constraint, restore_state);
if (constraint == GLITZ_DRAWABLE_CURRENT)
{
if (_glitz_fbo_bind (drawable))
{
drawable->base.update_all = drawable->other->update_all = 1;
surface->fb = drawable->fb;
return 1;
}
}
return 0;
}
static glitz_surface_t *
_glitz_fbo_pop_current (void *abstract_drawable)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
GLITZ_GL_DRAWABLE (drawable->other);
gl->bind_framebuffer (GLITZ_GL_FRAMEBUFFER, 0);
return drawable->other->backend->pop_current (drawable->other);
}
static void
_glitz_fbo_make_current (void *abstract_drawable,
void *abstract_context)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
drawable->other->backend->make_current (drawable->other, abstract_context);
_glitz_fbo_bind (drawable);
}
static glitz_bool_t
_glitz_fbo_swap_buffers (void *abstract_drawable)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
if (!drawable->fb)
return 1;
/* flip */
if (drawable->base.back && drawable->base.front)
{
glitz_texture_t tmp;
tmp = drawable->base.front->texture;
drawable->base.front->texture = drawable->base.back->texture;
drawable->base.back->texture = tmp;
return 1;
}
return 0;
}
static glitz_bool_t
_glitz_fbo_copy_sub_buffer (void *abstract_drawable,
int x,
int y,
int width,
int height)
{
return 0;
}
static void
_glitz_fbo_destroy (void *abstract_drawable)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
if (drawable->fb)
{
GLITZ_GL_DRAWABLE (drawable->other);
drawable->other->backend->push_current (drawable->other, NULL,
GLITZ_ANY_CONTEXT_CURRENT,
NULL);
gl->delete_framebuffers (1, &drawable->fb);
if (drawable->front)
gl->delete_renderbuffers (1, &drawable->front);
if (drawable->back)
gl->delete_renderbuffers (1, &drawable->back);
if (drawable->depth)
gl->delete_renderbuffers (1, &drawable->depth);
if (drawable->stencil)
gl->delete_renderbuffers (1, &drawable->stencil);
drawable->other->backend->pop_current (drawable->other);
}
glitz_drawable_destroy (drawable->other);
free (drawable);
}
static void
_glitz_fbo_draw_buffer (void *abstract_drawable,
const glitz_gl_enum_t buffer)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
GLITZ_GL_DRAWABLE (drawable->other);
switch (buffer) {
case GLITZ_GL_FRONT:
gl->draw_buffer (GLITZ_GL_COLOR_ATTACHMENT0);
break;
case GLITZ_GL_BACK:
gl->draw_buffer (GLITZ_GL_COLOR_ATTACHMENT1);
break;
/* TODO: use GL_ARB_draw_buffers
case GLITZ_GL_FRONT_AND_BACK:
*/
default:
break;
}
}
static void
_glitz_fbo_read_buffer (void *abstract_drawable,
const glitz_gl_enum_t buffer)
{
glitz_fbo_drawable_t *drawable = (glitz_fbo_drawable_t *)
abstract_drawable;
GLITZ_GL_DRAWABLE (drawable->other);
switch (buffer) {
case GLITZ_GL_FRONT:
gl->read_buffer (GLITZ_GL_COLOR_ATTACHMENT0);
break;
case GLITZ_GL_BACK:
gl->read_buffer (GLITZ_GL_COLOR_ATTACHMENT1);
default:
break;
}
}
glitz_drawable_t *
_glitz_fbo_drawable_create (glitz_drawable_t *other,
glitz_int_drawable_format_t *format,
int width,
int height)
{
glitz_fbo_drawable_t *drawable;
glitz_backend_t *backend;
drawable = malloc (sizeof (glitz_fbo_drawable_t) +
sizeof (glitz_backend_t));
if (!drawable)
return NULL;
glitz_drawable_reference (other);
drawable->other = other;
backend = (glitz_backend_t *) (drawable + 1);
*backend = *other->backend;
backend->destroy = _glitz_fbo_destroy;
backend->push_current = _glitz_fbo_push_current;
backend->pop_current = _glitz_fbo_pop_current;
backend->attach_notify = _glitz_fbo_attach_notify;
backend->detach_notify = _glitz_fbo_detach_notify;
backend->swap_buffers = _glitz_fbo_swap_buffers;
backend->copy_sub_buffer = _glitz_fbo_copy_sub_buffer;
backend->make_current = _glitz_fbo_make_current;
backend->draw_buffer = _glitz_fbo_draw_buffer;
backend->read_buffer = _glitz_fbo_read_buffer;
drawable->fb = 0;
drawable->width = 0;
drawable->height = 0;
drawable->front = 0;
drawable->back = 0;
drawable->depth = 0;
drawable->stencil = 0;
drawable->front_texture = 0;
drawable->back_texture = 0;
/* XXX: temporary solution until we have proper format validation */
if (format->d.color.alpha_size)
drawable->internal_format = GLITZ_GL_RGBA;
else
drawable->internal_format = GLITZ_GL_RGB;
_glitz_drawable_init (&drawable->base, format, backend, width, height);
return &drawable->base;
}
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