src/gallium/drivers/llvmpipe/lp_bld_format.h

/**************************************************************************
 *
 * Copyright 2009 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.
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 **************************************************************************/

#ifndef LP_BLD_FORMAT_H
#define LP_BLD_FORMAT_H


/**
 * @file
 * Pixel format helpers.
 */

#include <llvm-c/Core.h>  

#include "pipe/p_format.h"

struct util_format_description;
struct lp_type;


/**
 * Unpack a pixel into its RGBA components.
 *
 * @param packed integer.
 *
 * @return RGBA in a 4 floats vector.
 */
LLVMValueRef
lp_build_unpack_rgba_aos(LLVMBuilderRef builder,
                         enum pipe_format format,
                         LLVMValueRef packed);


/**
 * Pack a pixel.
 *
 * @param rgba 4 float vector with the unpacked components.
 */
LLVMValueRef
lp_build_pack_rgba_aos(LLVMBuilderRef builder,
                       enum pipe_format format,
                       LLVMValueRef rgba);


/**
 * Load a pixel into its RGBA components.
 *
 * @param ptr value with the pointer to the packed pixel. Pointer type is
 * irrelevant.
 *
 * @return RGBA in a 4 floats vector.
 */
LLVMValueRef
lp_build_load_rgba_aos(LLVMBuilderRef builder,
                       enum pipe_format format,
                       LLVMValueRef ptr);


/**
 * Store a pixel.
 *
 * @param rgba 4 float vector with the unpacked components.
 */
void 
lp_build_store_rgba_aos(LLVMBuilderRef builder,
                        enum pipe_format format,
                        LLVMValueRef ptr,
                        LLVMValueRef rgba);

LLVMValueRef
lp_build_gather(LLVMBuilderRef builder,
                unsigned length,
                unsigned src_width,
                unsigned dst_width,
                LLVMValueRef base_ptr,
                LLVMValueRef offsets);


void
lp_build_unpack_rgba_soa(LLVMBuilderRef builder,
                         const struct util_format_description *format_desc,
                         struct lp_type type,
                         LLVMValueRef packed,
                         LLVMValueRef *rgba);


void
lp_build_load_rgba_soa(LLVMBuilderRef builder,
                       const struct util_format_description *format_desc,
                       struct lp_type type,
                       LLVMValueRef base_ptr,
                       LLVMValueRef offsets,
                       LLVMValueRef *rgba);

#endif /* !LP_BLD_FORMAT_H */