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/*
* Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
*
* 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
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, 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 (including the next
* paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
* THE AUTHOR(S) AND/OR THEIR SUPPLIERS 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. */
#include "r300_texture.h"
static int minify(int i)
{
return MAX2(1, i >> 1);
}
static void r300_setup_miptree(struct r300_texture* tex)
{
struct pipe_texture* base = &tex->tex;
int stride, size, offset;
for (int i = 0; i <= base->last_level; i++) {
if (i > 0) {
base->width[i] = minify(base->width[i-1]);
base->height[i] = minify(base->height[i-1]);
base->depth[i] = minify(base->depth[i-1]);
}
base->nblocksx[i] = pf_get_nblocksx(&base->block, base->width[i]);
base->nblocksy[i] = pf_get_nblocksy(&base->block, base->width[i]);
/* Radeons enjoy things in multiples of 32. */
/* XXX NPOT -> 64, not 32 */
stride = (base->nblocksx[i] * base->block.size + 31) & ~31;
size = stride * base->nblocksy[i] * base->depth[i];
/* XXX 64 for NPOT */
tex->offset[i] = (tex->size + 31) & ~31;
tex->size = tex->offset[i] + size;
}
}
/* Create a new texture. */
static struct pipe_texture*
r300_texture_create(struct pipe_screen* screen,
const struct pipe_texture* template)
{
struct r300_screen* r300screen = r300_screen(screen);
struct r300_texture* tex = CALLOC_STRUCT(r300_texture);
if (!tex) {
return NULL;
}
tex->tex = *template;
tex->tex.refcount = 1;
tex->tex.screen = screen;
r300_setup_miptree(tex);
tex->buffer = screen->winsys->buffer_create(screen->winsys, 32,
PIPE_BUFFER_USAGE_PIXEL,
tex->size);
if (!tex->buffer) {
FREE(tex);
return NULL;
}
return (struct pipe_texture*)tex;
}
static void r300_texture_release(struct pipe_screen* screen,
struct pipe_texture** texture)
{
if (!*texture) {
return;
}
(*texture)->refcount--;
if ((*texture)->refcount <= 0) {
struct r300_texture* tex = (struct r300_texture*)*texture;
pipe_buffer_reference(screen, &tex->buffer, NULL);
FREE(tex);
}
*texture = NULL;
}
static struct pipe_surface* r300_get_tex_surface(struct pipe_screen* screen,
struct pipe_texture* texture,
unsigned face,
unsigned level,
unsigned zslice,
unsigned flags)
{
struct r300_texture* tex = (struct r300_texture*)texture;
struct pipe_surface* surface = CALLOC_STRUCT(pipe_surface);
unsigned offset;
/* XXX this is certainly dependent on tex target */
offset = tex->offset[level];
if (surface) {
surface->refcount = 1;
surface->winsys = screen->winsys;
pipe_texture_reference(&surface->texture, texture);
pipe_buffer_reference(screen, &surface->buffer, tex->buffer);
surface->format = texture->format;
surface->width = texture->width[level];
surface->height = texture->height[level];
surface->block = texture->block;
surface->nblocksx = texture->nblocksx[level];
surface->nblocksy = texture->nblocksy[level];
/* XXX save the actual stride instead plz kthnxbai */
surface->stride =
(texture->nblocksx[level] * texture->block.size + 31) & ~31;
surface->offset = offset;
surface->usage = flags;
surface->status = PIPE_SURFACE_STATUS_DEFINED;
}
return surface;
}
static void r300_tex_surface_release(struct pipe_screen* screen,
struct pipe_surface** surface)
{
struct pipe_surface* s = *surface;
s->refcount--;
if (s->refcount <= 0) {
pipe_texture_reference(&s->texture, NULL);
pipe_buffer_reference(screen, &s->buffer, NULL);
FREE(s);
}
*surface = NULL;
}
void r300_init_screen_texture_functions(struct pipe_screen* screen)
{
screen->texture_create = r300_texture_create;
screen->texture_release = r300_texture_release;
screen->get_tex_surface = r300_get_tex_surface;
screen->tex_surface_release = r300_tex_surface_release;
}
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