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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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.
*/
/*
* gaussian_blur_region no longer does combination; arguments changed
* -- scott@poverty.bloomington.in.us, 16Oct97
*/
#ifndef __PAINT_FUNCS_H__
#define __PAINT_FUNCS_H__
#include "pixel_region.h"
/* Called initially to setup accelerated rendering features */
void paint_funcs_setup (void);
void paint_funcs_free (void);
/* Paint functions */
void color_pixels (unsigned char *, unsigned char *,
int, int);
void blend_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int);
void shade_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int);
void extract_alpha_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int);
void darken_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int);
void lighten_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int);
void hsv_only_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int, int);
void color_only_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int, int);
void multiply_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int);
void screen_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int);
void overlay_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int);
void add_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int);
void subtract_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int);
void difference_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int, int, int, int);
void dissolve_pixels (unsigned char *, unsigned char *, int, int,
int, int, int, int, int);
void swap_pixels (unsigned char *, unsigned char *, int);
void scale_pixels (unsigned char *, unsigned char *,
int, int);
void add_alpha_pixels (unsigned char *, unsigned char *,
int, int);
void flatten_pixels (unsigned char *, unsigned char *,
unsigned char *, int, int);
void gray_to_rgb_pixels (unsigned char *, unsigned char *,
int, int);
/* apply the mask data to the alpha channel of the pixel data */
void apply_mask_to_alpha_channel (unsigned char *, unsigned char *,
int, int, int);
/* combine the mask data with the alpha channel of the pixel data */
void combine_mask_and_alpha_channel (unsigned char *, unsigned char *,
int, int, int);
/* copy gray pixels to intensity-alpha pixels. This function
* essentially takes a source that is only a grayscale image and
* copies it to the destination, expanding to RGB if necessary and
* adding an alpha channel. (OPAQUE)
*/
void copy_gray_to_inten_a_pixels (unsigned char *, unsigned char *,
int, int);
/* lay down the initial pixels in the case of only one
* channel being visible and no layers...In this singular
* case, we want to display a grayscale image w/o transparency
*/
void initial_channel_pixels (unsigned char *, unsigned char *,
int, int);
/* lay down the initial pixels in the case of an indexed image.
* This process obviously requires no composition
*/
void initial_indexed_pixels (unsigned char *, unsigned char *,
unsigned char *, int);
/* lay down the initial pixels in the case of an indexed image.
* This process obviously requires no composition
*/
void initial_indexed_a_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int);
/* lay down the initial pixels for the base layer.
* This process obviously requires no composition.
*/
void initial_inten_pixels (unsigned char *, unsigned char *,
unsigned char *, int,
int *, int, int);
/* lay down the initial pixels for the base layer.
* This process obviously requires no composition.
*/
void initial_inten_a_pixels (unsigned char *, unsigned char *,
unsigned char *, int,
int *, int, int);
/* combine indexed images with an optional mask which
* is interpreted as binary...destination is indexed...
*/
void combine_indexed_and_indexed_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int);
/* combine indexed images with indexed-alpha images
* result is an indexed image
*/
void combine_indexed_and_indexed_a_pixels(unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int);
/* combine indexed-alpha images with indexed-alpha images
* result is an indexed-alpha image. use this for painting
* to an indexed floating sel
*/
void combine_indexed_a_and_indexed_a_pixels(unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int);
/* combine intensity with indexed, destination is
* intensity-alpha...use this for an indexed floating sel
*/
void combine_inten_a_and_indexed_a_pixels(unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
unsigned char *, int, int, int);
/* combine RGB image with RGB or GRAY with GRAY
* destination is intensity-only...
*/
void combine_inten_and_inten_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int);
/* combine an RGBA or GRAYA image with an RGB or GRAY image
* destination is intensity-only...
*/
void combine_inten_and_inten_a_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int);
/* combine an RGB or GRAY image with an RGBA or GRAYA image
* destination is intensity-alpha...
*/
void combine_inten_a_and_inten_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int, int);
/* combine an RGBA or GRAYA image with an RGBA or GRAYA image
* destination is of course intensity-alpha...
*/
void combine_inten_a_and_inten_a_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int, int);
/* combine a channel with intensity-alpha pixels based
* on some opacity, and a channel color...
* destination is intensity-alpha
*/
void combine_inten_a_and_channel_mask_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int, int);
void combine_inten_a_and_channel_selection_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int, int);
/* paint "behind" the existing pixel row.
* This is similar in appearance to painting on a layer below
* the existing pixels.
*/
void behind_inten_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int, int, int, int);
/* paint "behind" the existing pixel row (for indexed images).
* This is similar in appearance to painting on a layer below
* the existing pixels.
*/
void behind_indexed_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int, int, int, int);
/* replace the contents of one pixel row with the other
* The operation is still bounded by mask/opacity constraints
*/
void replace_inten_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int, int, int, int);
/* replace the contents of one pixel row with the other
* The operation is still bounded by mask/opacity constraints
*/
void replace_indexed_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int, int, int, int);
/* apply source 2 to source 1, but in a non-additive way,
* multiplying alpha channels (works for intensity)
*/
void erase_inten_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int);
/* apply source 2 to source 1, but in a non-additive way,
* multiplying alpha channels (works for indexed)
*/
void erase_indexed_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int *, int, int);
/* extract information from intensity pixels based on
* a mask.
*/
void extract_from_inten_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
int, int, int, int);
/* extract information from indexed pixels based on
* a mask.
*/
void extract_from_indexed_pixels (unsigned char *, unsigned char *,
unsigned char *, unsigned char *,
unsigned char *, int, int, int, int);
/* variable source to RGB color mapping
* src_type == 0 (RGB)
* src_type == 1 (GRAY)
* src_type == 2 (INDEXED)
*/
void
map_to_color (int, unsigned char *,
unsigned char *, unsigned char *);
/* RGB to index mapping functions...
*
* Hash table lookup speeds up the standard
* least squares method
*/
int map_rgb_to_indexed (unsigned char *, int, int,
int, int, int);
/* Region functions */
void color_region (PixelRegion *, unsigned char *);
void blend_region (PixelRegion *, PixelRegion *,
PixelRegion *, int);
void shade_region (PixelRegion *, PixelRegion *,
unsigned char *, int);
void copy_region (PixelRegion *, PixelRegion *);
void add_alpha_region (PixelRegion *, PixelRegion *);
void flatten_region (PixelRegion *, PixelRegion *,
unsigned char *);
void extract_alpha_region (PixelRegion *, PixelRegion *,
PixelRegion *);
void extract_from_region (PixelRegion *, PixelRegion *,
PixelRegion *, unsigned char *,
unsigned char *, int, int, int);
/* The types of convolutions */
#define NORMAL 0 /* Negative numbers truncated */
#define ABSOLUTE 1 /* Absolute value */
#define NEGATIVE 2 /* add 127 to values */
void convolve_region (PixelRegion *, PixelRegion *,
int *, int, int, int);
void multiply_alpha_region (PixelRegion *);
void separate_alpha_region (PixelRegion *);
void gaussian_blur_region (PixelRegion *, double);
void border_region (PixelRegion *, void *,
int, int);
void scale_region (PixelRegion *, PixelRegion *);
void scale_region_no_resample (PixelRegion *, PixelRegion *);
void subsample_region (PixelRegion *, PixelRegion *,
int);
float shapeburst_region (PixelRegion *, PixelRegion *);
/* The types of thinning */
#define SHRINK_REGION 0
#define GROW_REGION 1
int thin_region (PixelRegion *, int);
void swap_region (PixelRegion *, PixelRegion *);
/* Apply a mask to an image's alpha channel */
void apply_mask_to_region (PixelRegion *, PixelRegion *, int);
/* Combine a mask with an image's alpha channel */
void combine_mask_and_region (PixelRegion *, PixelRegion *, int);
/* Copy a gray image to an intensity-alpha region */
void copy_gray_to_region (PixelRegion *, PixelRegion *);
/* Lay down the groundwork for layer construction...
* This includes background images for indexed or non-alpha
* images, floating selections, selective display of intensity
* channels, and display of arbitrary mask channels
*/
#define INITIAL_CHANNEL_MASK 0
#define INITIAL_CHANNEL_SELECTION 1
#define INITIAL_INDEXED 2
#define INITIAL_INDEXED_ALPHA 3
#define INITIAL_INTENSITY 4
#define INITIAL_INTENSITY_ALPHA 5
void initial_region (PixelRegion *, PixelRegion *,
PixelRegion *, unsigned char *,
int, int, int *, int);
/* Combine two source regions with the help of an optional mask
* region into a destination region. This is used for constructing
* layer projections, and for applying image patches to an image
*/
#define COMBINE_INDEXED_INDEXED 0
#define COMBINE_INDEXED_INDEXED_A 1
#define COMBINE_INDEXED_A_INDEXED_A 2
#define COMBINE_INTEN_A_INDEXED_A 3
#define COMBINE_INTEN_A_CHANNEL_MASK 4
#define COMBINE_INTEN_A_CHANNEL_SELECTION 5
#define COMBINE_INTEN_INTEN 6
#define COMBINE_INTEN_INTEN_A 7
#define COMBINE_INTEN_A_INTEN 8
#define COMBINE_INTEN_A_INTEN_A 9
/* Non-conventional combination modes */
#define BEHIND_INTEN 20
#define BEHIND_INDEXED 21
#define REPLACE_INTEN 22
#define REPLACE_INDEXED 23
#define ERASE_INTEN 24
#define ERASE_INDEXED 25
#define NO_COMBINATION 26
void combine_regions (PixelRegion *, PixelRegion *,
PixelRegion *, PixelRegion *,
unsigned char *, int,
int, int *, int);
void combine_regions_replace (PixelRegion *, PixelRegion *,
PixelRegion *, PixelRegion *,
unsigned char *,
int, int *, int);
/* Color conversion routines */
void rgb_to_hsv (int *, int *, int *);
void hsv_to_rgb (int *, int *, int *);
void rgb_to_hls (int *, int *, int *);
void hls_to_rgb (int *, int *, int *);
/* Opacities */
#define TRANSPARENT_OPACITY 0
#define OPAQUE_OPACITY 255
/* Layer Modes */
#define NORMAL_MODE 0
#define DISSOLVE_MODE 1
#define BEHIND_MODE 2
#define MULTIPLY_MODE 3
#define SCREEN_MODE 4
#define OVERLAY_MODE 5
#define DIFFERENCE_MODE 6
#define ADDITION_MODE 7
#define SUBTRACT_MODE 8
#define DARKEN_ONLY_MODE 9
#define LIGHTEN_ONLY_MODE 10
#define HUE_MODE 11
#define SATURATION_MODE 12
#define COLOR_MODE 13
#define VALUE_MODE 14
#define ERASE_MODE 15
#define REPLACE_MODE 16
/* Applying layer modes... */
int apply_layer_mode (unsigned char *, unsigned char *,
unsigned char **, int, int, int,
int, int, int, int, int, int, int *);
int apply_indexed_layer_mode (unsigned char *, unsigned char *,
unsigned char **, int, int, int);
#endif /* __PAINT_FUNCS_H__ */
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