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/**************************************************************************
*
* Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
* All Rights Reserved.
* Copyright 2010 VMware, Inc. All rights reserved.
*
* 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, 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
*
**************************************************************************/
#ifndef SP_TEX_SAMPLE_H
#define SP_TEX_SAMPLE_H
#include "tgsi/tgsi_exec.h"
struct sp_sampler_variant;
typedef void (*wrap_nearest_func)(float s,
unsigned size,
int *icoord);
typedef void (*wrap_linear_func)(float s,
unsigned size,
int *icoord0,
int *icoord1,
float *w);
typedef float (*compute_lambda_func)(const struct sp_sampler_variant *sampler,
const float s[TGSI_QUAD_SIZE],
const float t[TGSI_QUAD_SIZE],
const float p[TGSI_QUAD_SIZE]);
typedef void (*img_filter_func)(struct tgsi_sampler *tgsi_sampler,
float s,
float t,
float p,
unsigned level,
unsigned face_id,
enum tgsi_sampler_control control,
float *rgba);
typedef void (*filter_func)(struct tgsi_sampler *tgsi_sampler,
const float s[TGSI_QUAD_SIZE],
const float t[TGSI_QUAD_SIZE],
const float p[TGSI_QUAD_SIZE],
const float c0[TGSI_QUAD_SIZE],
const float c1[TGSI_QUAD_SIZE],
enum tgsi_sampler_control control,
float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
union sp_sampler_key {
struct {
unsigned target:5;
unsigned is_pot:1;
unsigned processor:2;
unsigned unit:4;
unsigned swizzle_r:3;
unsigned swizzle_g:3;
unsigned swizzle_b:3;
unsigned swizzle_a:3;
unsigned pad:8;
} bits;
unsigned value;
};
/**
* Subclass of tgsi_sampler
*/
struct sp_sampler_variant
{
struct tgsi_sampler base; /**< base class */
union sp_sampler_key key;
/* The owner of this struct:
*/
const struct pipe_sampler_state *sampler;
/* Currently bound texture:
*/
const struct pipe_sampler_view *view;
struct softpipe_tex_tile_cache *cache;
unsigned processor;
/* For sp_get_samples_2d_linear_POT:
*/
unsigned xpot;
unsigned ypot;
unsigned faces[TGSI_QUAD_SIZE];
wrap_nearest_func nearest_texcoord_s;
wrap_nearest_func nearest_texcoord_t;
wrap_nearest_func nearest_texcoord_p;
wrap_linear_func linear_texcoord_s;
wrap_linear_func linear_texcoord_t;
wrap_linear_func linear_texcoord_p;
img_filter_func min_img_filter;
img_filter_func mag_img_filter;
compute_lambda_func compute_lambda;
filter_func mip_filter;
filter_func compare;
filter_func sample_target;
/* Linked list:
*/
struct sp_sampler_variant *next;
};
struct sp_sampler;
/* Create a sampler variant for a given set of non-orthogonal state. Currently the
*/
struct sp_sampler_variant *
sp_create_sampler_variant( const struct pipe_sampler_state *sampler,
const union sp_sampler_key key );
void sp_sampler_variant_bind_view( struct sp_sampler_variant *variant,
struct softpipe_tex_tile_cache *tex_cache,
const struct pipe_sampler_view *view );
void sp_sampler_variant_destroy( struct sp_sampler_variant * );
static INLINE struct sp_sampler_variant *
sp_sampler_variant(const struct tgsi_sampler *sampler)
{
return (struct sp_sampler_variant *) sampler;
}
extern void
sp_get_samples(struct tgsi_sampler *tgsi_sampler,
const float s[TGSI_QUAD_SIZE],
const float t[TGSI_QUAD_SIZE],
const float p[TGSI_QUAD_SIZE],
float lodbias,
float rgba[TGSI_NUM_CHANNELS][TGSI_QUAD_SIZE]);
#endif /* SP_TEX_SAMPLE_H */
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