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/*
* Mesa 3-D graphics library
* Version: 7.9
*
* Copyright (C) 2010 LunarG Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
* Chia-I Wu <olv@lunarg.com>
*/
#include "util/u_memory.h"
#include "util/u_inlines.h"
#include "xm_api.h"
#include "xm_st.h"
/* support OpenGL by default */
#ifndef XMESA_ST_MODULE
#define XMESA_ST_MODULE st_module_OpenGL
#endif
struct xmesa_st_framebuffer {
struct pipe_screen *screen;
XMesaBuffer buffer;
struct st_visual stvis;
unsigned texture_width, texture_height;
struct pipe_texture *textures[ST_ATTACHMENT_COUNT];
struct pipe_surface *display_surface;
};
static INLINE struct xmesa_st_framebuffer *
xmesa_st_framebuffer(struct st_framebuffer_iface *stfbi)
{
return (struct xmesa_st_framebuffer *) stfbi->st_manager_private;
}
/**
* Display an attachment to the xlib_drawable of the framebuffer.
*/
static boolean
xmesa_st_framebuffer_display(struct st_framebuffer_iface *stfbi,
enum st_attachment_type statt)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
struct pipe_texture *ptex = xstfb->textures[statt];
struct pipe_surface *psurf;
if (!ptex)
return TRUE;
psurf = xstfb->display_surface;
/* (re)allocate the surface for the texture to be displayed */
if (!psurf || psurf->texture != ptex) {
pipe_surface_reference(&xstfb->display_surface, NULL);
psurf = xstfb->screen->get_tex_surface(xstfb->screen,
ptex, 0, 0, 0, PIPE_BUFFER_USAGE_CPU_READ);
if (!psurf)
return FALSE;
xstfb->display_surface = psurf;
}
xstfb->screen->flush_frontbuffer(xstfb->screen, psurf, &xstfb->buffer->ws);
return TRUE;
}
/**
* Remove outdated textures and create the requested ones.
*/
static void
xmesa_st_framebuffer_validate_textures(struct st_framebuffer_iface *stfbi,
const enum st_attachment_type *statts,
unsigned count)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
struct pipe_texture templ;
unsigned request_mask, i;
request_mask = 0;
for (i = 0; i < count; i++)
request_mask |= 1 << statts[i];
memset(&templ, 0, sizeof(templ));
templ.target = PIPE_TEXTURE_2D;
templ.width0 = xstfb->texture_width;
templ.height0 = xstfb->texture_height;
templ.depth0 = 1;
templ.last_level = 0;
for (i = 0; i < ST_ATTACHMENT_COUNT; i++) {
struct pipe_texture *ptex = xstfb->textures[i];
enum pipe_format format;
unsigned tex_usage;
/* remove outdated textures */
if (ptex && (ptex->width0 != xstfb->texture_width ||
ptex->height0 != xstfb->texture_height)) {
pipe_texture_reference(&xstfb->textures[i], NULL);
ptex = NULL;
}
/* the texture already exists or not requested */
if (ptex || !(request_mask & (1 << i)))
continue;
switch (i) {
case ST_ATTACHMENT_FRONT_LEFT:
case ST_ATTACHMENT_BACK_LEFT:
case ST_ATTACHMENT_FRONT_RIGHT:
case ST_ATTACHMENT_BACK_RIGHT:
format = xstfb->stvis.color_format;
tex_usage = PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
PIPE_TEXTURE_USAGE_RENDER_TARGET;
break;
case ST_ATTACHMENT_DEPTH_STENCIL:
format = xstfb->stvis.depth_stencil_format;
tex_usage = PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
break;
default:
format = PIPE_FORMAT_NONE;
break;
}
if (format != PIPE_FORMAT_NONE) {
templ.format = format;
templ.tex_usage = tex_usage;
xstfb->textures[i] =
xstfb->screen->texture_create(xstfb->screen, &templ);
}
}
}
static boolean
xmesa_st_framebuffer_validate(struct st_framebuffer_iface *stfbi,
const enum st_attachment_type *statts,
unsigned count,
struct pipe_texture **out)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
unsigned i;
/* revalidate textures */
if (xstfb->buffer->width != xstfb->texture_width ||
xstfb->buffer->height != xstfb->texture_height) {
xstfb->texture_width = xstfb->buffer->width;
xstfb->texture_height = xstfb->buffer->height;
xmesa_st_framebuffer_validate_textures(stfbi, statts, count);
}
for (i = 0; i < count; i++) {
out[i] = NULL;
pipe_texture_reference(&out[i], xstfb->textures[statts[i]]);
}
return TRUE;
}
static boolean
xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
enum st_attachment_type statt)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
boolean ret;
ret = xmesa_st_framebuffer_display(stfbi, statt);
if (ret)
xmesa_check_buffer_size(xstfb->buffer);
return ret;
}
struct st_framebuffer_iface *
xmesa_create_st_framebuffer(struct pipe_screen *screen, XMesaBuffer b)
{
struct st_framebuffer_iface *stfbi;
struct xmesa_st_framebuffer *xstfb;
stfbi = CALLOC_STRUCT(st_framebuffer_iface);
xstfb = CALLOC_STRUCT(xmesa_st_framebuffer);
if (!stfbi || !xstfb) {
if (stfbi)
FREE(stfbi);
if (xstfb)
FREE(xstfb);
return NULL;
}
xstfb->screen = screen;
xstfb->buffer = b;
xstfb->stvis = b->xm_visual->stvis;
stfbi->visual = &xstfb->stvis;
stfbi->flush_front = xmesa_st_framebuffer_flush_front;
stfbi->validate = xmesa_st_framebuffer_validate;
stfbi->st_manager_private = (void *) xstfb;
return stfbi;
}
void
xmesa_destroy_st_framebuffer(struct st_framebuffer_iface *stfbi)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
int i;
pipe_surface_reference(&xstfb->display_surface, NULL);
for (i = 0; i < ST_ATTACHMENT_COUNT; i++)
pipe_texture_reference(&xstfb->textures[i], NULL);
FREE(xstfb);
FREE(stfbi);
}
void
xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
boolean ret;
ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
if (ret) {
struct pipe_texture **front, **back, *tmp;
front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
/* swap textures only if the front texture has been allocated */
if (*front) {
tmp = *front;
*front = *back;
*back = tmp;
}
xmesa_check_buffer_size(xstfb->buffer);
}
}
void
xmesa_copy_st_framebuffer(struct st_framebuffer_iface *stfbi,
enum st_attachment_type src,
enum st_attachment_type dst,
int x, int y, int w, int h)
{
/* TODO */
}
struct st_api *
xmesa_create_st_api(void)
{
return XMESA_ST_MODULE.create_api();
}
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