/**
 * \file image.h
 * Image handling.
 */

/*
 * Mesa 3-D graphics library
 * Version:  6.3
 *
 * Copyright (C) 1999-2004  Brian Paul   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, 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.
 */


#ifndef IMAGE_H
#define IMAGE_H


#include "mtypes.h"


extern void
_mesa_swap2( GLushort *p, GLuint n );

extern void
_mesa_swap4( GLuint *p, GLuint n );

extern GLint
_mesa_sizeof_type( GLenum type );

extern GLint
_mesa_sizeof_packed_type( GLenum type );

extern GLint
_mesa_components_in_format( GLenum format );

extern GLint
_mesa_bytes_per_pixel( GLenum format, GLenum type );

extern GLboolean
_mesa_is_legal_format_and_type( GLcontext *ctx, GLenum format, GLenum type );


extern GLvoid *
_mesa_image_address( GLuint dimensions,
                     const struct gl_pixelstore_attrib *packing,
                     const GLvoid *image,
                     GLsizei width, GLsizei height,
                     GLenum format, GLenum type,
                     GLint img, GLint row, GLint column );

extern GLvoid *
_mesa_image_address1d( const struct gl_pixelstore_attrib *packing,
                       const GLvoid *image,
                       GLsizei width,
                       GLenum format, GLenum type,
                       GLint column );

extern GLvoid *
_mesa_image_address2d( const struct gl_pixelstore_attrib *packing,
                       const GLvoid *image,
                       GLsizei width, GLsizei height,
                       GLenum format, GLenum type,
                       GLint row, GLint column );

extern GLvoid *
_mesa_image_address3d( const struct gl_pixelstore_attrib *packing,
                       const GLvoid *image,
                       GLsizei width, GLsizei height,
                       GLenum format, GLenum type,
                       GLint img, GLint row, GLint column );


extern GLint
_mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
                        GLint width, GLenum format, GLenum type );


extern GLint
_mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
                          GLint width, GLint height,
                          GLenum format, GLenum type );

extern void
_mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32],
                              const struct gl_pixelstore_attrib *unpacking );


extern void
_mesa_pack_polygon_stipple( const GLuint pattern[32], GLubyte *dest,
                            const struct gl_pixelstore_attrib *packing );


extern GLvoid *
_mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels,
                     const struct gl_pixelstore_attrib *packing );

extern void
_mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
                   GLubyte *dest, const struct gl_pixelstore_attrib *packing );


extern void
_mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLuint transferOps,
                              GLuint n, GLfloat rgba[][4]);

extern void
_mesa_pack_rgba_span_float( GLcontext *ctx,
                            GLuint n, CONST GLfloat rgba[][4],
                            GLenum dstFormat, GLenum dstType, GLvoid *dstAddr,
                            const struct gl_pixelstore_attrib *dstPacking,
                            GLuint transferOps );


extern void
_mesa_pack_rgba_span_chan( GLcontext *ctx,
                           GLuint n, CONST GLchan rgba[][4],
                           GLenum dstFormat, GLenum dstType, GLvoid *dstAddr,
                           const struct gl_pixelstore_attrib *dstPacking,
                           GLuint transferOps );


extern void
_mesa_unpack_color_span_chan( GLcontext *ctx,
                              GLuint n, GLenum dstFormat, GLchan dest[],
                              GLenum srcFormat, GLenum srcType,
                              const GLvoid *source,
                              const struct gl_pixelstore_attrib *srcPacking,
                              GLuint transferOps );


extern void
_mesa_unpack_color_span_float( GLcontext *ctx,
                               GLuint n, GLenum dstFormat, GLfloat dest[],
                               GLenum srcFormat, GLenum srcType,
                               const GLvoid *source,
                               const struct gl_pixelstore_attrib *srcPacking,
                               GLuint transferOps );


extern void
_mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
                         GLenum dstType, GLvoid *dest,
                         GLenum srcType, const GLvoid *source,
                         const struct gl_pixelstore_attrib *srcPacking,
                         GLuint transferOps );


extern void
_mesa_pack_index_span( const GLcontext *ctx, GLuint n,
                       GLenum dstType, GLvoid *dest, const GLuint *source,
                       const struct gl_pixelstore_attrib *dstPacking,
                       GLuint transferOps );


extern void
_mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
                           GLenum dstType, GLvoid *dest,
                           GLenum srcType, const GLvoid *source,
                           const struct gl_pixelstore_attrib *srcPacking,
                           GLuint transferOps );

extern void
_mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
                         GLenum dstType, GLvoid *dest, const GLstencil *source,
                         const struct gl_pixelstore_attrib *dstPacking );


extern void
_mesa_unpack_depth_span( const GLcontext *ctx, GLuint n, GLfloat *dest,
                         GLenum srcType, const GLvoid *source,
                         const struct gl_pixelstore_attrib *srcPacking );

extern void
_mesa_pack_depth_span( const GLcontext *ctx, GLuint n, GLvoid *dest,
                       GLenum dstType, const GLfloat *depthSpan,
                       const struct gl_pixelstore_attrib *dstPacking );


extern void *
_mesa_unpack_image( GLuint dimensions,
                    GLsizei width, GLsizei height, GLsizei depth,
                    GLenum format, GLenum type, const GLvoid *pixels,
                    const struct gl_pixelstore_attrib *unpack );


extern GLboolean
_mesa_clip_drawpixels(const GLcontext *ctx,
                      GLint *destX, GLint *destY,
                      GLsizei *width, GLsizei *height,
                      GLint *skipPixels, GLint *skipRows);


extern GLboolean
_mesa_clip_readpixels(const GLcontext *ctx,
                      GLint *destX, GLint *destY,
                      GLsizei *width, GLsizei *height,
                      GLint *skipPixels, GLint *skipRows);


#endif
