src/gallium/auxiliary/tgsi/tgsi_util.h

/**************************************************************************
 * 
 * Copyright 2007 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 VMWARE 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 TGSI_UTIL_H
#define TGSI_UTIL_H

#include <stdbool.h>
#include "pipe/p_shader_tokens.h"

#if defined __cplusplus
extern "C" {
#endif

struct tgsi_src_register;
struct tgsi_full_src_register;
struct tgsi_full_instruction;

void *
tgsi_align_128bit(void *unaligned);

unsigned
tgsi_util_get_src_register_swizzle(const struct tgsi_src_register *reg,
                                   unsigned component);


unsigned
tgsi_util_get_full_src_register_swizzle(
   const struct tgsi_full_src_register *reg,
   unsigned component );

void
tgsi_util_set_src_register_swizzle(struct tgsi_src_register *reg,
                                   unsigned swizzle,
                                   unsigned component);

/* returns the channels of the src_idx src register used by the full instruction. */
unsigned
tgsi_util_get_inst_usage_mask(const struct tgsi_full_instruction *inst,
                              unsigned src_idx);

/* Returns the channels of the src_idx src register used by an instruction with
 * these parameters.
 */
unsigned
tgsi_util_get_src_usage_mask(enum tgsi_opcode opcode,
                             unsigned src_idx,
                             uint8_t write_mask,
                             uint8_t swizzle_x,
                             uint8_t swizzle_y,
                             uint8_t swizzle_z,
                             uint8_t swizzle_w,
                             enum tgsi_texture_type tex_target,
                             enum tgsi_texture_type mem_target);

struct tgsi_src_register
tgsi_util_get_src_from_ind(const struct tgsi_ind_register *reg);

int
tgsi_util_get_texture_coord_dim(enum tgsi_texture_type tgsi_tex);

int
tgsi_util_get_shadow_ref_src_index(enum tgsi_texture_type tgsi_tex);

bool
tgsi_is_shadow_target(enum tgsi_texture_type target);


static inline bool
tgsi_is_msaa_target(enum tgsi_texture_type target)
{
   return (target == TGSI_TEXTURE_2D_MSAA ||
           target == TGSI_TEXTURE_2D_ARRAY_MSAA);
}

static inline bool
tgsi_is_array_sampler(enum tgsi_texture_type target)
{
   return target == TGSI_TEXTURE_1D_ARRAY ||
          target == TGSI_TEXTURE_SHADOW1D_ARRAY ||
          target == TGSI_TEXTURE_2D_ARRAY ||
          target == TGSI_TEXTURE_SHADOW2D_ARRAY ||
          target == TGSI_TEXTURE_CUBE_ARRAY ||
          target == TGSI_TEXTURE_SHADOWCUBE_ARRAY ||
          target == TGSI_TEXTURE_2D_ARRAY_MSAA;
}

#if defined __cplusplus
}
#endif

#endif /* TGSI_UTIL_H */