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/* -*- mode: c; c-default-style: "gnu"; tab-width: 2; c-basic-indent: 2; indent-tabs-mode: nil -*-
* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Gimp Image Compositing
* Copyright (C) 2003 Helvetix Victorinox, a pseudonym, <helvetix@gimp.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __GIMP_COMPOSITE_H__
#define __GIMP_COMPOSITE_H__
typedef enum
{
GIMP_PIXELFORMAT_V8,
GIMP_PIXELFORMAT_VA8,
GIMP_PIXELFORMAT_RGB8,
GIMP_PIXELFORMAT_RGBA8,
GIMP_PIXELFORMAT_ANY,
GIMP_PIXELFORMAT_N
} GimpPixelFormat;
/*
* gtk-doc is unhappy with these #ifdef's inside the enumeration.
*
#ifdef GIMP_COMPOSITE_16BIT
GIMP_PIXELFORMAT_V16,
GIMP_PIXELFORMAT_VA16,
GIMP_PIXELFORMAT_RGB16,
GIMP_PIXELFORMAT_RGBA16,
#endif
#ifdef GIMP_COMPOSITE_32BIT
GIMP_PIXELFORMAT_V32,
GIMP_PIXELFORMAT_VA32,
GIMP_PIXELFORMAT_RGB32,
GIMP_PIXELFORMAT_RGBA32,
#endif
*
*/
/* bytes per-pixel for each of the pixel formats */
extern const guchar gimp_composite_pixel_bpp[];
/* does pixel format have alpha? */
extern const guchar gimp_composite_pixel_alphap[];
/* converter between alpha and non-alpha pixel formats */
extern const GimpPixelFormat gimp_composite_pixel_alpha[];
#define GIMP_COMPOSITE_ALPHA_OPAQUE (-1)
#define GIMP_COMPOSITE_ALPHA_TRANSPARENT (0)
/*
* This is the enumeration of all the supported compositing
* operations. Many of them are taken from the GimpLayerModeEffect
* enumeration, but there are (possibly more) implemented. Here is
* where they are all enumerated.
*
* Nota Bene: Unfortunately, the order here is important!
*/
typedef enum
{
GIMP_COMPOSITE_NORMAL = GIMP_NORMAL_MODE,
GIMP_COMPOSITE_DISSOLVE = GIMP_DISSOLVE_MODE,
GIMP_COMPOSITE_BEHIND = GIMP_BEHIND_MODE,
GIMP_COMPOSITE_MULTIPLY = GIMP_MULTIPLY_MODE,
GIMP_COMPOSITE_SCREEN = GIMP_SCREEN_MODE,
GIMP_COMPOSITE_OVERLAY = GIMP_OVERLAY_MODE,
GIMP_COMPOSITE_DIFFERENCE = GIMP_DIFFERENCE_MODE,
GIMP_COMPOSITE_ADDITION = GIMP_ADDITION_MODE,
GIMP_COMPOSITE_SUBTRACT = GIMP_SUBTRACT_MODE,
GIMP_COMPOSITE_DARKEN = GIMP_DARKEN_ONLY_MODE,
GIMP_COMPOSITE_LIGHTEN = GIMP_LIGHTEN_ONLY_MODE,
GIMP_COMPOSITE_HUE = GIMP_HUE_MODE,
GIMP_COMPOSITE_SATURATION = GIMP_SATURATION_MODE,
GIMP_COMPOSITE_COLOR_ONLY = GIMP_COLOR_MODE,
GIMP_COMPOSITE_VALUE = GIMP_VALUE_MODE,
GIMP_COMPOSITE_DIVIDE = GIMP_DIVIDE_MODE,
GIMP_COMPOSITE_DODGE = GIMP_DODGE_MODE,
GIMP_COMPOSITE_BURN = GIMP_BURN_MODE,
GIMP_COMPOSITE_HARDLIGHT = GIMP_HARDLIGHT_MODE,
GIMP_COMPOSITE_SOFTLIGHT = GIMP_SOFTLIGHT_MODE,
GIMP_COMPOSITE_GRAIN_EXTRACT = GIMP_GRAIN_EXTRACT_MODE,
GIMP_COMPOSITE_GRAIN_MERGE = GIMP_GRAIN_MERGE_MODE,
GIMP_COMPOSITE_COLOR_ERASE = GIMP_COLOR_ERASE_MODE,
GIMP_COMPOSITE_ERASE = GIMP_ERASE_MODE,
GIMP_COMPOSITE_REPLACE = GIMP_REPLACE_MODE,
GIMP_COMPOSITE_ANTI_ERASE = GIMP_ANTI_ERASE_MODE,
GIMP_COMPOSITE_BLEND,
GIMP_COMPOSITE_SHADE,
GIMP_COMPOSITE_SWAP,
GIMP_COMPOSITE_SCALE,
GIMP_COMPOSITE_CONVERT,
GIMP_COMPOSITE_XOR,
GIMP_COMPOSITE_N
} GimpCompositeOperation;
struct GimpCompositeOperationEffects
{
guchar affect_opacity;
guchar increase_opacity;
guchar decrease_opacity;
};
extern struct GimpCompositeOperationEffects gimp_composite_operation_effects[];
/*
* This is structure for communicating all that is necessary to a
* compositing operation.
*/
typedef struct
{
guchar *A; /* Source A */
guchar *B; /* Source B */
guchar *D; /* Destination */
guchar *M; /* Mask */
gulong n_pixels;
GimpPixelFormat pixelformat_A;
GimpPixelFormat pixelformat_B;
GimpPixelFormat pixelformat_D;
GimpPixelFormat pixelformat_M;
struct { gint opacity; gchar affect; } replace;
struct { gint scale; } scale;
struct { gint blend; } blend;
struct { gint x; gint y; gint opacity; } dissolve;
CombinationMode combine;
GimpCompositeOperation op;
} GimpCompositeContext;
struct GimpCompositeOptions
{
gulong bits;
};
#define GIMP_COMPOSITE_OPTION_USE 0x1
#define GIMP_COMPOSITE_OPTION_NOEXTENSIONS 0x2
#define GIMP_COMPOSITE_OPTION_VERBOSE 0x4
extern struct GimpCompositeOptions gimp_composite_options;
void gimp_composite_init (gboolean be_verbose,
gboolean use_cpu_accel);
void gimp_composite_dispatch (GimpCompositeContext *ctx);
void gimp_composite_context_print (GimpCompositeContext *ctx);
const gchar * gimp_composite_mode_astext (GimpCompositeOperation op);
const gchar * gimp_composite_pixelformat_astext (GimpPixelFormat format);
extern const gchar *gimp_composite_function_name[GIMP_COMPOSITE_N][GIMP_PIXELFORMAT_N][GIMP_PIXELFORMAT_N][GIMP_PIXELFORMAT_N];
extern void (*gimp_composite_function[GIMP_COMPOSITE_N][GIMP_PIXELFORMAT_N][GIMP_PIXELFORMAT_N][GIMP_PIXELFORMAT_N])(GimpCompositeContext *);
#endif /* __GIMP_COMPOSITE_H__ */
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