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gimp/app/paint_core.c
Tor Lillqvist f6858e21d1 Actually use the enum types GimpImageType, GimpImageBaseType, 
* app/*.[ch]: Actually use the enum types GimpImageType,
	GimpImageBaseType, LayerModeEffects, PaintApplicationMode,
	BrushApplicationMode, GimpFillType and ConvertPaletteType, instead
	of just int or gint. Hopefully I catched most of the places
	where these should be used.

	Add an enum ConvolutionType, suffix the too general constants
	NORMAL, ABSOLUTE and NEGATIVE with _CONVOL. Use NORMAL_MODE
	instead of NORMAL in some places (this was what was intended). Fix
	some minor gccisms.

	* app/apptypes.h: New file. This file contains the above
	enumeration types, and some opaque struct typedefs. It was
	necessary to collect these in one header that doesn't include
	other headers, because when we started using the above mentioned
	types in the headers, all hell broke loose because of the
	spaghetti-like cross-inclusion mess between headers.

	(An example: Header A includes header B, which includes header C
	which includes A. B uses a type defined in A. This is not defined,
	because A hasn't defined it yet at the point where it includes B,
	and A included from B of course is skipped as we already are
	reading A.)
1999-08-18 23:41:39 +00:00

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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.
*/
#include <stdlib.h>
#include <stdio.h> /* temporary for debugging */
#include <string.h>
#include <math.h>
#include "appenv.h"
#include "gimpbrushlist.h"
#include "drawable.h"
#include "errors.h"
#include "gdisplay.h"
#include "gimage_mask.h"
#include "gimprc.h"
#include "gradient.h" /* for grad_get_color_at() */
#include "paint_funcs.h"
#include "paint_core.h"
#include "palette.h"
#include "selection.h"
#include "tools.h"
#include "undo.h"
#include "cursorutil.h"
#include "libgimp/gimpintl.h"
#include "tile.h" /* ick. */
/* target size */
#define TARGET_HEIGHT 15
#define TARGET_WIDTH 15
#define EPSILON 0.00001
/* global variables--for use in the various paint tools */
PaintCore non_gui_paint_core;
/* local function prototypes */
static MaskBuf * paint_core_subsample_mask (MaskBuf *, double, double);
static MaskBuf * paint_core_pressurize_mask (MaskBuf *, double, double, double);
static MaskBuf * paint_core_solidify_mask (MaskBuf *);
static MaskBuf * paint_core_get_brush_mask (PaintCore *, BrushApplicationMode);
static void paint_core_paste (PaintCore *, MaskBuf *,
GimpDrawable *, int, int,
LayerModeEffects,
PaintApplicationMode);
static void paint_core_replace (PaintCore *, MaskBuf *,
GimpDrawable *, int, int,
PaintApplicationMode);
static void brush_to_canvas_tiles (PaintCore *, MaskBuf *, int);
static void canvas_tiles_to_canvas_buf (PaintCore *);
static void brush_to_canvas_buf (PaintCore *, MaskBuf *, int);
static void set_undo_tiles (GimpDrawable *, int, int, int, int);
static void set_canvas_tiles (int, int, int, int);
static int paint_core_invalidate_cache (GimpBrush *brush, gpointer *blah);
/***********************************************************************/
/* undo blocks variables */
static TileManager * undo_tiles = NULL;
static TileManager * canvas_tiles = NULL;
/***********************************************************************/
/* paint buffers variables */
static TempBuf * orig_buf = NULL;
static TempBuf * canvas_buf = NULL;
/* brush buffers */
static MaskBuf * pressure_brush;
static MaskBuf * solid_brush;
static MaskBuf * kernel_brushes[5][5];
/* paint buffers utility functions */
static void free_paint_buffers (void);
/***********************************************************************/
#define KERNEL_WIDTH 3
#define KERNEL_HEIGHT 3
/* Brush pixel subsampling kernels */
static const int subsample[5][5][9] = {
{
{ 64, 64, 0, 64, 64, 0, 0, 0, 0, },
{ 32, 96, 0, 32, 96, 0, 0, 0, 0, },
{ 0, 128, 0, 0, 128, 0, 0, 0, 0, },
{ 0, 96, 32, 0, 96, 32, 0, 0, 0, },
{ 0, 64, 64, 0, 64, 64, 0, 0, 0, },
},
{
{ 32, 32, 0, 96, 96, 0, 0, 0, 0, },
{ 16, 48, 0, 48, 144, 0, 0, 0, 0, },
{ 0, 64, 0, 0, 192, 0, 0, 0, 0, },
{ 0, 48, 16, 0, 144, 48, 0, 0, 0, },
{ 0, 32, 32, 0, 96, 96, 0, 0, 0, },
},
{
{ 0, 0, 0, 128, 128, 0, 0, 0, 0, },
{ 0, 0, 0, 64, 192, 0, 0, 0, 0, },
{ 0, 0, 0, 0, 256, 0, 0, 0, 0, },
{ 0, 0, 0, 0, 192, 64, 0, 0, 0, },
{ 0, 0, 0, 0, 128, 128, 0, 0, 0, },
},
{
{ 0, 0, 0, 96, 96, 0, 32, 32, 0, },
{ 0, 0, 0, 48, 144, 0, 16, 48, 0, },
{ 0, 0, 0, 0, 192, 0, 0, 64, 0, },
{ 0, 0, 0, 0, 144, 48, 0, 48, 16, },
{ 0, 0, 0, 0, 96, 96, 0, 32, 32, },
},
{
{ 0, 0, 0, 64, 64, 0, 64, 64, 0, },
{ 0, 0, 0, 32, 96, 0, 32, 96, 0, },
{ 0, 0, 0, 0, 128, 0, 0, 128, 0, },
{ 0, 0, 0, 0, 96, 32, 0, 96, 32, },
{ 0, 0, 0, 0, 64, 64, 0, 64, 64, },
},
};
static void
paint_core_sample_color (GimpDrawable *drawable,
int x,
int y,
int state)
{
unsigned char *color;
if ((color = gimp_drawable_get_color_at(drawable, x, y)))
{
if ((state & GDK_CONTROL_MASK))
palette_set_foreground (color[RED_PIX], color[GREEN_PIX], color [BLUE_PIX]);
else
palette_set_background (color[RED_PIX], color[GREEN_PIX], color [BLUE_PIX]);
g_free(color);
}
}
void
paint_core_button_press (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
PaintCore * paint_core;
GDisplay * gdisp;
gboolean draw_line;
double x, y;
GimpDrawable *drawable;
gdisp = (GDisplay *) gdisp_ptr;
paint_core = (PaintCore *) tool->private;
gdisplay_untransform_coords_f (gdisp, (double) bevent->x, (double) bevent->y, &x, &y, TRUE);
drawable = gimage_active_drawable (gdisp->gimage);
if (! paint_core_init (paint_core, drawable, x, y))
return;
draw_line = FALSE;
paint_core->curpressure = bevent->pressure;
paint_core->curxtilt = bevent->xtilt;
paint_core->curytilt = bevent->ytilt;
paint_core->state = bevent->state;
/* if this is a new image, reinit the core vals */
if ((gdisp_ptr != tool->gdisp_ptr) || ! (bevent->state & GDK_SHIFT_MASK))
{
/* initialize some values */
paint_core->startx = paint_core->lastx = paint_core->curx = x;
paint_core->starty = paint_core->lasty = paint_core->cury = y;
paint_core->startpressure = paint_core->lastpressure = paint_core->curpressure;
paint_core->startytilt = paint_core->lastytilt = paint_core->curytilt;
paint_core->startxtilt = paint_core->lastxtilt = paint_core->curxtilt;
}
/* If shift is down and this is not the first paint
* stroke, then draw a line from the last coords to the pointer
*/
else if (bevent->state & GDK_SHIFT_MASK)
{
draw_line = TRUE;
paint_core->startx = paint_core->lastx;
paint_core->starty = paint_core->lasty;
paint_core->startpressure = paint_core->lastpressure;
paint_core->startxtilt = paint_core->lastxtilt;
paint_core->startytilt = paint_core->lastytilt;
/* restrict to horizontal/vertical lines, if modifiers are pressed */
if (bevent->state & GDK_MOD1_MASK)
{
if (bevent->state & GDK_CONTROL_MASK)
{
double dx, dy;
dx = paint_core->curx - paint_core->lastx;
dy = paint_core->cury - paint_core->lasty;
paint_core->curx = paint_core->lastx +
((dx < 0) && (dy > 0) ? - MAX (dx, dy) : MAX (dx, dy));
paint_core->cury = paint_core->lasty +
((dy < 0) && (dx > 0) ? - MAX (dx, dy) : MAX (dx, dy));
}
else
paint_core->curx = paint_core->lastx;
}
else if (bevent->state & GDK_CONTROL_MASK)
paint_core->cury = paint_core->lasty;
}
tool->state = ACTIVE;
tool->gdisp_ptr = gdisp_ptr;
tool->paused_count = 0;
/* pause the current selection and grab the pointer */
gdisplays_selection_visibility (gdisp->gimage, SelectionPause);
/* add motion memory if perfectmouse is set */
if (perfectmouse != 0)
gdk_pointer_grab (gdisp->canvas->window, FALSE,
GDK_BUTTON1_MOTION_MASK | GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
else
gdk_pointer_grab (gdisp->canvas->window, FALSE,
GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK,
NULL, NULL, bevent->time);
/* Let the specific painting function initialize itself */
(* paint_core->paint_func) (paint_core, drawable, INIT_PAINT);
if (paint_core->pick_colors
&& !(bevent->state & GDK_SHIFT_MASK)
&& (bevent->state & (GDK_CONTROL_MASK | GDK_MOD1_MASK)))
{
paint_core_sample_color (drawable, x, y, bevent->state);
paint_core->pick_state = TRUE;
return;
}
else
paint_core->pick_state = FALSE;
/* Paint to the image */
if (draw_line)
{
draw_core_pause (paint_core->core, tool);
paint_core_interpolate (paint_core, drawable);
paint_core->lastx = paint_core->curx;
paint_core->lasty = paint_core->cury;
paint_core->lastpressure = paint_core->curpressure;
paint_core->lastxtilt = paint_core->curxtilt;
paint_core->lastytilt = paint_core->curytilt;
}
else
(* paint_core->paint_func) (paint_core, drawable, MOTION_PAINT);
gdisplay_flush_now (gdisp);
}
void
paint_core_button_release (Tool *tool,
GdkEventButton *bevent,
gpointer gdisp_ptr)
{
GDisplay * gdisp;
GImage * gimage;
PaintCore * paint_core;
gdisp = (GDisplay *) gdisp_ptr;
gimage = gdisp->gimage;
paint_core = (PaintCore *) tool->private;
/* resume the current selection and ungrab the pointer */
gdisplays_selection_visibility (gdisp->gimage, SelectionResume);
gdk_pointer_ungrab (bevent->time);
gdk_flush ();
/* Let the specific painting function finish up */
(* paint_core->paint_func) (paint_core, gimage_active_drawable (gdisp->gimage), FINISH_PAINT);
/* Set tool state to inactive -- no longer painting */
draw_core_stop (paint_core->core, tool);
tool->state = INACTIVE;
paint_core->pick_state = FALSE;
paint_core_finish (paint_core, gimage_active_drawable (gdisp->gimage), tool->ID);
gdisplays_flush ();
}
void
paint_core_motion (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay * gdisp;
PaintCore * paint_core;
gdisp = (GDisplay *) gdisp_ptr;
paint_core = (PaintCore *) tool->private;
gdisplay_untransform_coords_f (gdisp, (double) mevent->x, (double) mevent->y,
&paint_core->curx, &paint_core->cury, TRUE);
if (paint_core->pick_state)
{
paint_core_sample_color (gimage_active_drawable (gdisp->gimage),
paint_core->curx, paint_core->cury, mevent->state);
return;
}
paint_core->curpressure = mevent->pressure;
paint_core->curxtilt = mevent->xtilt;
paint_core->curytilt = mevent->ytilt;
paint_core->state = mevent->state;
paint_core_interpolate (paint_core, gimage_active_drawable (gdisp->gimage));
gdisplay_flush_now (gdisp);
paint_core->lastx = paint_core->curx;
paint_core->lasty = paint_core->cury;
paint_core->lastpressure = paint_core->curpressure;
paint_core->lastxtilt = paint_core->curxtilt;
paint_core->lastytilt = paint_core->curytilt;
}
void
paint_core_cursor_update (Tool *tool,
GdkEventMotion *mevent,
gpointer gdisp_ptr)
{
GDisplay *gdisp;
Layer *layer;
PaintCore * paint_core;
GdkCursorType ctype = GDK_TOP_LEFT_ARROW;
int x, y;
gdisp = (GDisplay *) gdisp_ptr;
paint_core = (PaintCore *) tool->private;
/* undraw the current tool */
draw_core_pause (paint_core->core, tool);
if ((layer = gimage_get_active_layer (gdisp->gimage)))
{
/* If shift is down and this is not the first paint stroke, draw a line */
if (gdisp_ptr == tool->gdisp_ptr && (mevent->state & GDK_SHIFT_MASK))
{
ctype = GDK_PENCIL;
/* Get the current coordinates */
gdisplay_untransform_coords_f (gdisp,
(double) mevent->x,
(double) mevent->y,
&paint_core->curx,
&paint_core->cury, TRUE);
/* restrict to horizontal/vertical lines, if modifiers are pressed */
if (mevent->state & GDK_MOD1_MASK)
{
if (mevent->state & GDK_CONTROL_MASK)
{
double dx, dy, d;
dx = paint_core->curx - paint_core->lastx;
dy = paint_core->cury - paint_core->lasty;
d = (fabs(dx) + fabs(dy)) / 2;
paint_core->curx = paint_core->lastx + ((dx < 0) ? -d : d);
paint_core->cury = paint_core->lasty + ((dy < 0) ? -d : d);
}
else
paint_core->curx = paint_core->lastx;
}
else if (mevent->state & GDK_CONTROL_MASK)
paint_core->cury = paint_core->lasty;
if (paint_core->core->gc == NULL)
draw_core_start (paint_core->core, gdisp->canvas->window, tool);
else
{
/* is this a bad hack ? */
paint_core->core->paused_count = 0;
draw_core_resume (paint_core->core, tool);
}
}
/* If Ctrl or Mod1 is pressed, pick colors */
else if (paint_core->pick_colors
&& !(mevent->state & GDK_SHIFT_MASK)
&& (mevent->state & (GDK_CONTROL_MASK | GDK_MOD1_MASK)))
{
ctype = GIMP_COLOR_PICKER_CURSOR;
}
/* Normal operation -- no modifier pressed or first stroke */
else
{
int off_x, off_y;
drawable_offsets (GIMP_DRAWABLE(layer), &off_x, &off_y);
gdisplay_untransform_coords (gdisp, (double) mevent->x, (double) mevent->y,
&x, &y, TRUE, FALSE);
if (x >= off_x && y >= off_y &&
x < (off_x + drawable_width (GIMP_DRAWABLE(layer))) &&
y < (off_y + drawable_height (GIMP_DRAWABLE(layer))))
{
/* One more test--is there a selected region?
* if so, is cursor inside?
*/
if (gimage_mask_is_empty (gdisp->gimage))
ctype = GDK_PENCIL;
else if (gimage_mask_value (gdisp->gimage, x, y))
ctype = GDK_PENCIL;
}
}
gdisplay_install_tool_cursor (gdisp, ctype);
}
}
void
paint_core_control (Tool *tool,
ToolAction action,
gpointer gdisp_ptr)
{
PaintCore * paint_core;
GDisplay *gdisp;
GimpDrawable *drawable;
gdisp = (GDisplay *) gdisp_ptr;
paint_core = (PaintCore *) tool->private;
drawable = gimage_active_drawable (gdisp->gimage);
switch (action)
{
case PAUSE:
break;
case RESUME:
break;
case HALT:
(* paint_core->paint_func) (paint_core, drawable, FINISH_PAINT);
draw_core_stop (paint_core->core, tool);
paint_core_cleanup ();
break;
default:
break;
}
}
void
paint_core_draw (Tool *tool)
{
GDisplay *gdisp;
PaintCore * paint_core;
int tx1, ty1, tx2, ty2;
paint_core = (PaintCore *) tool->private;
/* if shift was never used, paint_core->core->gc is NULL
and we don't care about a redraw */
if (paint_core->core->gc != NULL)
{
gdisp = (GDisplay *) tool->gdisp_ptr;
gdisplay_transform_coords (gdisp, paint_core->lastx, paint_core->lasty,
&tx1, &ty1, 1);
gdisplay_transform_coords (gdisp, paint_core->curx, paint_core->cury,
&tx2, &ty2, 1);
/* Draw start target */
gdk_draw_line (gdisp->canvas->window, paint_core->core->gc,
tx1 - (TARGET_WIDTH >> 1), ty1,
tx1 + (TARGET_WIDTH >> 1), ty1);
gdk_draw_line (gdisp->canvas->window, paint_core->core->gc,
tx1, ty1 - (TARGET_HEIGHT >> 1),
tx1, ty1 + (TARGET_HEIGHT >> 1));
/* Draw end target */
gdk_draw_line (gdisp->canvas->window, paint_core->core->gc,
tx2 - (TARGET_WIDTH >> 1), ty2,
tx2 + (TARGET_WIDTH >> 1), ty2);
gdk_draw_line (gdisp->canvas->window, paint_core->core->gc,
tx2, ty2 - (TARGET_HEIGHT >> 1),
tx2, ty2 + (TARGET_HEIGHT >> 1));
/* Draw the line between the start and end coords */
gdk_draw_line (gdisp->canvas->window, paint_core->core->gc,
tx1, ty1, tx2, ty2);
}
return;
}
Tool *
paint_core_new (ToolType type)
{
Tool * tool;
PaintCore * private;
tool = tools_new_tool (type);
private = g_new (PaintCore, 1);
private->core = draw_core_new (paint_core_draw);
private->pick_colors = FALSE;
tool->private = (void *) private;
tool->button_press_func = paint_core_button_press;
tool->button_release_func = paint_core_button_release;
tool->motion_func = paint_core_motion;
tool->cursor_update_func = paint_core_cursor_update;
tool->control_func = paint_core_control;
return tool;
}
void
paint_core_free (Tool *tool)
{
PaintCore * paint_core;
paint_core = (PaintCore *) tool->private;
/* Make sure the selection core is not visible */
if (tool->state == ACTIVE && paint_core->core)
draw_core_stop (paint_core->core, tool);
/* Free the selection core */
if (paint_core->core)
draw_core_free (paint_core->core);
/* Cleanup memory */
paint_core_cleanup ();
/* Free the paint core */
g_free (paint_core);
}
int
paint_core_init (PaintCore *paint_core,
GimpDrawable *drawable,
double x,
double y)
{
static GimpBrushP brush = 0;
paint_core->curx = x;
paint_core->cury = y;
/* Set up some defaults for non-gui use */
paint_core->startpressure = paint_core->lastpressure = paint_core->curpressure = 0.5;
paint_core->startxtilt = paint_core->lastxtilt = paint_core->curxtilt = 0;
paint_core->startytilt = paint_core->lastytilt = paint_core->curytilt = 0;
/* Each buffer is the same size as the maximum bounds of the active brush... */
if (brush && brush != get_active_brush ())
{
gtk_signal_disconnect_by_func(GTK_OBJECT(brush),
GTK_SIGNAL_FUNC(paint_core_invalidate_cache),
NULL);
gtk_object_unref(GTK_OBJECT(brush));
}
if (!(brush = get_active_brush ()))
{
g_message (_("No brushes available for use with this tool."));
return FALSE;
}
gtk_object_ref(GTK_OBJECT(brush));
gtk_signal_connect(GTK_OBJECT (brush), "dirty",
GTK_SIGNAL_FUNC(paint_core_invalidate_cache),
NULL);
paint_core->spacing = (double) gimp_brush_get_spacing (brush) / 100.0;
paint_core->brush = brush;
/* free the block structures */
if (undo_tiles)
tile_manager_destroy (undo_tiles);
if (canvas_tiles)
tile_manager_destroy (canvas_tiles);
/* Allocate the undo structure */
undo_tiles = tile_manager_new (drawable_width (drawable),
drawable_height (drawable),
drawable_bytes (drawable));
/* Allocate the canvas blocks structure */
canvas_tiles = tile_manager_new (drawable_width (drawable),
drawable_height (drawable), 1);
/* Get the initial undo extents */
paint_core->x1 = paint_core->x2 = paint_core->curx;
paint_core->y1 = paint_core->y2 = paint_core->cury;
paint_core->distance = 0.0;
return TRUE;
}
void
paint_core_get_color_from_gradient (PaintCore *paint_core,
double gradient_length,
double *r, double *g, double *b, double *a,
int mode)
{
double y;
double distance; /* distance in current brush stroke */
double position; /* position in the gradient to ge the color from */
double temp_opacity; /* so i can blank out stuff */
distance = paint_core->distance;
y = ((double) distance / gradient_length);
temp_opacity = 1.0;
/* if were past the first chunk... */
if ((y/gradient_length) > 1.0)
{
/* if this is an "odd" chunk... */
if ((int)(y/gradient_length) & 1)
{
/* draw it "normally" */
y = y - (gradient_length*(int)(y/gradient_length));
}
/* if this is an "even" chunk... */
else
{
/* draw it "backwards" */
switch (mode)
{
case LOOP_SAWTOOTH:
y = y - (gradient_length*(int)(y/gradient_length));
break;
case LOOP_TRIANGLE:
y = gradient_length - fmod(y,gradient_length);
break;
}
}
if(mode == ONCE_FORWARD || mode == ONCE_BACKWARDS)
{
/* printf("got here \n"); */
/* for the once modes, set alpha to 0.0 */
temp_opacity = 0.0;
}
}
/* if this is the first chunk... */
else
{
/* draw it backwards */
switch (mode)
{
case ONCE_FORWARD:
case ONCE_END_COLOR:
case LOOP_TRIANGLE:
y = gradient_length - y;
break;
default:
/* all the other modes go here ;-> */
break;
}
/* if it doesnt need to be reveresed, let y be y ;-> */
}
/* stolen from the fade effect in paintbrush */
/* model this on a gaussian curve */
/* position = exp (- y * y * 0.5); */
position = y/gradient_length;
grad_get_color_at(position,r,g,b,a);
/* set opacity to zero if this isnt a repeater call */
*a = (temp_opacity * *a);
}
void
paint_core_interpolate (PaintCore *paint_core,
GimpDrawable *drawable)
{
double n;
vector2d delta;
double dpressure, dxtilt, dytilt;
double left;
double t;
double initial;
double dist;
double total;
double xd, yd;
double mag;
delta.x = paint_core->curx - paint_core->lastx;
delta.y = paint_core->cury - paint_core->lasty;
dpressure = paint_core->curpressure - paint_core->lastpressure;
dxtilt = paint_core->curxtilt - paint_core->lastxtilt;
dytilt = paint_core->curytilt - paint_core->lastytilt;
/* return if there has been no motion */
if (!delta.x && !delta.y && !dpressure && !dxtilt && !dytilt)
return;
/* calculate the distance traveled in the coordinate space of the brush */
mag = vector2d_magnitude (&(paint_core->brush->x_axis));
xd = vector2d_dot_product(&delta, &(paint_core->brush->x_axis)) / (mag*mag);
mag = vector2d_magnitude (&(paint_core->brush->y_axis));
yd = vector2d_dot_product(&delta, &(paint_core->brush->y_axis)) / (mag*mag);
dist = .5 * sqrt (xd*xd + yd*yd);
total = dist + paint_core->distance;
initial = paint_core->distance;
while (paint_core->distance < total)
{
n = (int) (paint_core->distance / paint_core->spacing + 1.0 + EPSILON);
left = n * paint_core->spacing - paint_core->distance;
paint_core->distance += left;
if (paint_core->distance <= (total+EPSILON))
{
t = (paint_core->distance - initial) / dist;
paint_core->curx = paint_core->lastx + delta.x * t;
paint_core->cury = paint_core->lasty + delta.y * t;
paint_core->curpressure = paint_core->lastpressure + dpressure * t;
paint_core->curxtilt = paint_core->lastxtilt + dxtilt * t;
paint_core->curytilt = paint_core->lastytilt + dytilt * t;
(* paint_core->paint_func) (paint_core, drawable, MOTION_PAINT);
}
}
paint_core->distance = total;
paint_core->curx = paint_core->lastx + delta.x;
paint_core->cury = paint_core->lasty + delta.y;
paint_core->curpressure = paint_core->lastpressure + dpressure;
paint_core->curxtilt = paint_core->lastxtilt + dxtilt;
paint_core->curytilt = paint_core->lastytilt + dytilt;
}
void
paint_core_finish (PaintCore *paint_core,
GimpDrawable *drawable,
int tool_id)
{
GImage *gimage;
PaintUndo *pu;
if (! (gimage = drawable_gimage (drawable)))
return;
/* Determine if any part of the image has been altered--
* if nothing has, then just return...
*/
if ((paint_core->x2 == paint_core->x1) || (paint_core->y2 == paint_core->y1))
return;
undo_push_group_start (gimage, PAINT_CORE_UNDO);
pu = (PaintUndo *) g_malloc (sizeof (PaintUndo));
pu->tool_ID = tool_id;
pu->lastx = paint_core->startx;
pu->lasty = paint_core->starty;
pu->lastpressure = paint_core->startpressure;
pu->lastxtilt = paint_core->startxtilt;
pu->lastytilt = paint_core->startytilt;
/* Push a paint undo */
undo_push_paint (gimage, pu);
/* push an undo */
drawable_apply_image (drawable, paint_core->x1, paint_core->y1,
paint_core->x2, paint_core->y2, undo_tiles, TRUE);
undo_tiles = NULL;
/* push the group end */
undo_push_group_end (gimage);
/* invalidate the drawable--have to do it here, because
* it is not done during the actual painting.
*/
drawable_invalidate_preview (drawable);
}
void
paint_core_cleanup ()
{
/* CLEANUP */
/* If the undo tiles exist, nuke them */
if (undo_tiles)
{
tile_manager_destroy (undo_tiles);
undo_tiles = NULL;
}
/* If the canvas blocks exist, nuke them */
if (canvas_tiles)
{
tile_manager_destroy (canvas_tiles);
canvas_tiles = NULL;
}
/* Free the temporary buffers if they exist */
free_paint_buffers ();
}
/************************/
/* Painting functions */
/************************/
TempBuf *
paint_core_get_paint_area (PaintCore *paint_core,
GimpDrawable *drawable)
{
int x, y;
int x1, y1, x2, y2;
int bytes;
int dwidth, dheight;
bytes = drawable_has_alpha (drawable) ?
drawable_bytes (drawable) : drawable_bytes (drawable) + 1;
/* adjust the x and y coordinates to the upper left corner of the brush */
x = (int) paint_core->curx - (paint_core->brush->mask->width >> 1);
y = (int) paint_core->cury - (paint_core->brush->mask->height >> 1);
dwidth = drawable_width (drawable);
dheight = drawable_height (drawable);
x1 = BOUNDS (x - 1, 0, dwidth);
y1 = BOUNDS (y - 1, 0, dheight);
x2 = BOUNDS (x + paint_core->brush->mask->width + 1,
0, dwidth);
y2 = BOUNDS (y + paint_core->brush->mask->height + 1,
0, dheight);
/* configure the canvas buffer */
if ((x2 - x1) && (y2 - y1))
canvas_buf = temp_buf_resize (canvas_buf, bytes, x1, y1,
(x2 - x1), (y2 - y1));
else
return NULL;
return canvas_buf;
}
TempBuf *
paint_core_get_orig_image (PaintCore *paint_core,
GimpDrawable *drawable,
int x1, int y1, int x2, int y2)
{
PixelRegion srcPR, destPR;
Tile *undo_tile;
int h;
int refd;
int pixelwidth;
int dwidth, dheight;
unsigned char * s, * d;
void * pr;
orig_buf = temp_buf_resize (orig_buf, drawable_bytes (drawable),
x1, y1, (x2 - x1), (y2 - y1));
dwidth = drawable_width (drawable);
dheight = drawable_height (drawable);
x1 = BOUNDS (x1, 0, dwidth);
y1 = BOUNDS (y1, 0, dheight);
x2 = BOUNDS (x2, 0, dwidth);
y2 = BOUNDS (y2, 0, dheight);
/* configure the pixel regions */
pixel_region_init (&srcPR, drawable_data (drawable), x1, y1,
(x2 - x1), (y2 - y1), FALSE);
destPR.bytes = orig_buf->bytes;
destPR.x = 0; destPR.y = 0;
destPR.w = (x2 - x1); destPR.h = (y2 - y1);
destPR.rowstride = orig_buf->bytes * orig_buf->width;
destPR.data = temp_buf_data (orig_buf) +
(y1 - orig_buf->y) * destPR.rowstride + (x1 - orig_buf->x) * destPR.bytes;
for (pr = pixel_regions_register (2, &srcPR, &destPR);
pr != NULL;
pr = pixel_regions_process (pr))
{
/* If the undo tile corresponding to this location is valid, use it */
undo_tile = tile_manager_get_tile (undo_tiles, srcPR.x, srcPR.y,
FALSE, FALSE);
if (tile_is_valid (undo_tile) == TRUE)
{
refd = 1;
undo_tile = tile_manager_get_tile (undo_tiles, srcPR.x, srcPR.y,
TRUE, FALSE);
s = (unsigned char*)tile_data_pointer (undo_tile, 0, 0) +
srcPR.rowstride * (srcPR.y % TILE_HEIGHT) +
srcPR.bytes * (srcPR.x % TILE_WIDTH); /* dubious... */
}
else
{
refd = 0;
s = srcPR.data;
}
d = destPR.data;
pixelwidth = srcPR.w * srcPR.bytes;
h = srcPR.h;
while (h --)
{
memcpy (d, s, pixelwidth);
s += srcPR.rowstride;
d += destPR.rowstride;
}
if (refd)
tile_release (undo_tile, FALSE);
}
return orig_buf;
}
void
paint_core_paste_canvas (PaintCore *paint_core,
GimpDrawable *drawable,
int brush_opacity,
int image_opacity,
LayerModeEffects paint_mode,
BrushApplicationMode brush_hardness,
PaintApplicationMode mode)
{
MaskBuf *brush_mask;
/* get the brush mask */
brush_mask = paint_core_get_brush_mask (paint_core, brush_hardness);
/* paste the canvas buf */
paint_core_paste (paint_core, brush_mask, drawable,
brush_opacity, image_opacity, paint_mode, mode);
}
/* Similar to paint_core_paste_canvas, but replaces the alpha channel
rather than using it to composite (i.e. transparent over opaque
becomes transparent rather than opauqe. */
void
paint_core_replace_canvas (PaintCore *paint_core,
GimpDrawable *drawable,
int brush_opacity,
int image_opacity,
BrushApplicationMode brush_hardness,
PaintApplicationMode mode)
{
MaskBuf *brush_mask;
/* get the brush mask */
brush_mask = paint_core_get_brush_mask (paint_core, brush_hardness);
/* paste the canvas buf */
paint_core_replace (paint_core, brush_mask, drawable,
brush_opacity, image_opacity, mode);
}
static MaskBuf *last_brush_mask = NULL;
static int cache_invalid = 0;
static int paint_core_invalidate_cache(GimpBrush *brush, gpointer *blah)
{
/* Make sure we don't cache data for a brush that has changed */
if (last_brush_mask == brush->mask)
{
cache_invalid = 1;
return 1;
}
return 0;
}
/************************************************************
* LOCAL FUNCTION DEFINITIONS *
************************************************************/
static MaskBuf *
paint_core_subsample_mask (MaskBuf *mask,
double x,
double y)
{
MaskBuf * dest;
double left;
unsigned char * m, * d;
const int * k;
int index1, index2;
const int * kernel;
int new_val;
int i, j;
int r, s;
x += (x < 0) ? mask->width : 0;
left = x - floor(x) + 0.125;
index1 = (int) (left * 4);
y += (y < 0) ? mask->height : 0;
left = y - floor(y) + 0.125;
index2 = (int) (left * 4);
kernel = subsample[index2][index1];
if ((mask == last_brush_mask) && kernel_brushes[index2][index1] &&
!cache_invalid)
return kernel_brushes[index2][index1];
else if (mask != last_brush_mask || cache_invalid)
for (i = 0; i < 5; i++)
for (j = 0; j < 5; j++)
{
if (kernel_brushes[i][j])
mask_buf_free (kernel_brushes[i][j]);
kernel_brushes[i][j] = NULL;
}
last_brush_mask = mask;
cache_invalid = 0;
kernel_brushes[index2][index1] = mask_buf_new (mask->width + 2, mask->height + 2);
dest = kernel_brushes[index2][index1];
m = mask_buf_data (mask);
for (i = 0; i < mask->height; i++)
{
for (j = 0; j < mask->width; j++)
{
k = kernel;
for (r = 0; r < KERNEL_HEIGHT; r++)
{
d = mask_buf_data (dest) + (i+r) * dest->width + j;
s = KERNEL_WIDTH;
while (s--)
{
new_val = *d + ((*m * *k++ + 128) >> 8);
*d++ = MINIMUM (new_val, 255);
}
}
m++;
}
}
return dest;
}
/* #define FANCY_PRESSURE */
static MaskBuf *
paint_core_pressurize_mask (MaskBuf *brush_mask,
double x,
double y,
double pressure)
{
static MaskBuf *last_brush = NULL;
static unsigned char mapi[256];
unsigned char *source;
unsigned char *dest;
MaskBuf *subsample_mask;
int i;
#ifdef FANCY_PRESSURE
static double map[256];
double ds,s,c;
#endif
/* Get the raw subsampled mask */
subsample_mask = paint_core_subsample_mask(brush_mask, x, y);
/* Special case pressure = 0.5 */
if ((int)(pressure*100+0.5) == 50)
return subsample_mask;
/* Make sure we have the right sized buffer */
if (brush_mask != last_brush)
{
if (pressure_brush)
mask_buf_free (pressure_brush);
pressure_brush = mask_buf_new (brush_mask->width + 2,
brush_mask->height +2);
}
#ifdef FANCY_PRESSURE
/* Create the pressure profile
It is: I'(I) = tanh(20*(pressure-0.5)*I) : pressure > 0.5
I'(I) = 1 - tanh(20*(0.5-pressure)*(1-I)) : pressure < 0.5
It looks like:
low pressure medium pressure high pressure
| / --
| / /
/ / |
-- / |
*/
ds = (pressure - 0.5)*(20./256.);
s = 0;
c = 1.0;
if (ds > 0)
{
for (i=0;i<256;i++)
{
map[i] = s/c;
s += c*ds;
c += s*ds;
}
for (i=0;i<256;i++)
mapi[i] = (int)(255*map[i]/map[255]);
}
else
{
ds = -ds;
for (i=255;i>=0;i--)
{
map[i] = s/c;
s += c*ds;
c += s*ds;
}
for (i=0;i<256;i++)
mapi[i] = (int)(255*(1-map[i]/map[0]));
}
#else /* ! FANCY_PRESSURE */
for (i=0;i<256;i++)
{
int tmp = (pressure/0.5)*i;
if (tmp > 255)
mapi[i] = 255;
else
mapi[i] = tmp;
}
#endif /* FANCY_PRESSURE */
/* Now convert the brush */
source = mask_buf_data (subsample_mask);
dest = mask_buf_data (pressure_brush);
i = subsample_mask->width * subsample_mask->height;
while (i--)
{
*dest++ = mapi[(*source++)];
}
return pressure_brush;
}
static MaskBuf *
paint_core_solidify_mask (MaskBuf *brush_mask)
{
static MaskBuf *last_brush = NULL;
int i, j;
unsigned char * data, * src;
if (brush_mask == last_brush)
return solid_brush;
last_brush = brush_mask;
if (solid_brush)
mask_buf_free (solid_brush);
solid_brush = mask_buf_new (brush_mask->width + 2, brush_mask->height + 2);
/* get the data and advance one line into it */
data = mask_buf_data (solid_brush) + solid_brush->width;
src = mask_buf_data (brush_mask);
for (i = 0; i < brush_mask->height; i++)
{
data++;
for (j = 0; j < brush_mask->width; j++)
{
*data++ = (*src++) ? OPAQUE_OPACITY : TRANSPARENT_OPACITY;
}
data++;
}
return solid_brush;
}
static MaskBuf *
paint_core_get_brush_mask (PaintCore *paint_core,
BrushApplicationMode brush_hardness)
{
MaskBuf * bm;
switch (brush_hardness)
{
case SOFT:
bm = paint_core_subsample_mask (paint_core->brush->mask, paint_core->curx, paint_core->cury);
break;
case HARD:
bm = paint_core_solidify_mask (paint_core->brush->mask);
break;
case PRESSURE:
bm = paint_core_pressurize_mask (paint_core->brush->mask, paint_core->curx, paint_core->cury, paint_core->curpressure);
break;
default:
bm = NULL;
break;
}
return bm;
}
static void
paint_core_paste (PaintCore *paint_core,
MaskBuf *brush_mask,
GimpDrawable *drawable,
int brush_opacity,
int image_opacity,
LayerModeEffects paint_mode,
PaintApplicationMode mode)
{
GImage *gimage;
PixelRegion srcPR;
TileManager *alt = NULL;
int offx, offy;
if (! (gimage = drawable_gimage (drawable)))
return;
/* set undo blocks */
set_undo_tiles (drawable,
canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height);
/* If the mode is CONSTANT:
* combine the canvas buf, the brush mask to the canvas tiles
*/
if (mode == CONSTANT)
{
/* initialize any invalid canvas tiles */
set_canvas_tiles (canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height);
brush_to_canvas_tiles (paint_core, brush_mask, brush_opacity);
canvas_tiles_to_canvas_buf (paint_core);
alt = undo_tiles;
}
/* Otherwise:
* combine the canvas buf and the brush mask to the canvas buf
*/
else /* mode != CONSTANT */
brush_to_canvas_buf (paint_core, brush_mask, brush_opacity);
/* intialize canvas buf source pixel regions */
srcPR.bytes = canvas_buf->bytes;
srcPR.x = 0; srcPR.y = 0;
srcPR.w = canvas_buf->width;
srcPR.h = canvas_buf->height;
srcPR.rowstride = canvas_buf->width * canvas_buf->bytes;
srcPR.data = temp_buf_data (canvas_buf);
/* apply the paint area to the gimage */
gimage_apply_image (gimage, drawable, &srcPR,
FALSE, image_opacity, paint_mode,
alt, /* specify an alternative src1 */
canvas_buf->x, canvas_buf->y);
/* Update the undo extents */
paint_core->x1 = MINIMUM (paint_core->x1, canvas_buf->x);
paint_core->y1 = MINIMUM (paint_core->y1, canvas_buf->y);
paint_core->x2 = MAXIMUM (paint_core->x2, (canvas_buf->x + canvas_buf->width));
paint_core->y2 = MAXIMUM (paint_core->y2, (canvas_buf->y + canvas_buf->height));
/* Update the gimage--it is important to call gdisplays_update_area
* instead of drawable_update because we don't want the drawable
* preview to be constantly invalidated
*/
drawable_offsets (drawable, &offx, &offy);
gdisplays_update_area (gimage, canvas_buf->x + offx, canvas_buf->y + offy,
canvas_buf->width, canvas_buf->height);
}
/* This works similarly to paint_core_paste. However, instead of combining
the canvas to the paint core drawable using one of the combination
modes, it uses a "replace" mode (i.e. transparent pixels in the
canvas erase the paint core drawable).
When not drawing on alpha-enabled images, it just paints using NORMAL
mode.
*/
static void
paint_core_replace (PaintCore *paint_core,
MaskBuf *brush_mask,
GimpDrawable *drawable,
int brush_opacity,
int image_opacity,
PaintApplicationMode mode)
{
GImage *gimage;
PixelRegion srcPR, maskPR;
TileManager *alt = NULL;
int offx, offy;
if (!drawable_has_alpha (drawable))
{
paint_core_paste (paint_core, brush_mask, drawable,
brush_opacity, image_opacity, NORMAL_MODE,
mode);
return;
}
if (! (gimage = drawable_gimage (drawable)))
return;
/* set undo blocks */
set_undo_tiles (drawable,
canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height);
if (mode == CONSTANT)
{
/* initialize any invalid canvas tiles */
set_canvas_tiles (canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height);
/* combine the brush mask and the canvas tiles */
brush_to_canvas_tiles (paint_core, brush_mask, brush_opacity);
/* set the alt source as the unaltered undo_tiles */
alt = undo_tiles;
/* initialize the maskPR from the canvas tiles */
pixel_region_init (&maskPR, canvas_tiles,
canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height, FALSE);
}
else
{
/* The mask is just the brush mask */
maskPR.bytes = 1;
maskPR.x = 0; maskPR.y = 0;
maskPR.w = canvas_buf->width;
maskPR.h = canvas_buf->height;
maskPR.rowstride = maskPR.bytes * brush_mask->width;
maskPR.data = mask_buf_data (brush_mask);
}
/* intialize canvas buf source pixel regions */
srcPR.bytes = canvas_buf->bytes;
srcPR.x = 0; srcPR.y = 0;
srcPR.w = canvas_buf->width;
srcPR.h = canvas_buf->height;
srcPR.rowstride = canvas_buf->width * canvas_buf->bytes;
srcPR.data = temp_buf_data (canvas_buf);
/* apply the paint area to the gimage */
gimage_replace_image (gimage, drawable, &srcPR,
FALSE, image_opacity,
&maskPR,
canvas_buf->x, canvas_buf->y);
/* Update the undo extents */
paint_core->x1 = MINIMUM (paint_core->x1, canvas_buf->x);
paint_core->y1 = MINIMUM (paint_core->y1, canvas_buf->y);
paint_core->x2 = MAXIMUM (paint_core->x2, (canvas_buf->x + canvas_buf->width));
paint_core->y2 = MAXIMUM (paint_core->y2, (canvas_buf->y + canvas_buf->height));
/* Update the gimage--it is important to call gdisplays_update_area
* instead of drawable_update because we don't want the drawable
* preview to be constantly invalidated
*/
drawable_offsets (drawable, &offx, &offy);
gdisplays_update_area (gimage, canvas_buf->x + offx, canvas_buf->y + offy,
canvas_buf->width, canvas_buf->height);
}
static void
canvas_tiles_to_canvas_buf(PaintCore *paint_core)
{
PixelRegion srcPR, maskPR;
/* combine the canvas tiles and the canvas buf */
srcPR.bytes = canvas_buf->bytes;
srcPR.x = 0; srcPR.y = 0;
srcPR.w = canvas_buf->width;
srcPR.h = canvas_buf->height;
srcPR.rowstride = canvas_buf->width * canvas_buf->bytes;
srcPR.data = temp_buf_data (canvas_buf);
pixel_region_init (&maskPR, canvas_tiles,
canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height, FALSE);
/* apply the canvas tiles to the canvas buf */
apply_mask_to_region (&srcPR, &maskPR, OPAQUE_OPACITY);
}
static void
brush_to_canvas_tiles (
PaintCore *paint_core,
MaskBuf *brush_mask,
int brush_opacity
)
{
PixelRegion srcPR, maskPR;
int x, y;
int xoff, yoff;
/* combine the brush mask and the canvas tiles */
pixel_region_init (&srcPR, canvas_tiles,
canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height, TRUE);
x = (int) paint_core->curx - (brush_mask->width >> 1);
y = (int) paint_core->cury - (brush_mask->height >> 1);
xoff = (x < 0) ? -x : 0;
yoff = (y < 0) ? -y : 0;
maskPR.bytes = 1;
maskPR.x = 0; maskPR.y = 0;
maskPR.w = srcPR.w;
maskPR.h = srcPR.h;
maskPR.rowstride = maskPR.bytes * brush_mask->width;
maskPR.data = mask_buf_data (brush_mask) + yoff * maskPR.rowstride + xoff * maskPR.bytes;
/* combine the mask to the canvas tiles */
combine_mask_and_region (&srcPR, &maskPR, brush_opacity);
}
static void
brush_to_canvas_buf (
PaintCore *paint_core,
MaskBuf *brush_mask,
int brush_opacity
)
{
PixelRegion srcPR, maskPR;
int x, y;
int xoff, yoff;
x = (int) paint_core->curx - (brush_mask->width >> 1);
y = (int) paint_core->cury - (brush_mask->height >> 1);
xoff = (x < 0) ? -x : 0;
yoff = (y < 0) ? -y : 0;
/* combine the canvas buf and the brush mask to the canvas buf */
srcPR.bytes = canvas_buf->bytes;
srcPR.x = 0; srcPR.y = 0;
srcPR.w = canvas_buf->width;
srcPR.h = canvas_buf->height;
srcPR.rowstride = canvas_buf->width * canvas_buf->bytes;
srcPR.data = temp_buf_data (canvas_buf);
maskPR.bytes = 1;
maskPR.x = 0; maskPR.y = 0;
maskPR.w = srcPR.w;
maskPR.h = srcPR.h;
maskPR.rowstride = maskPR.bytes * brush_mask->width;
maskPR.data = mask_buf_data (brush_mask) + yoff * maskPR.rowstride + xoff * maskPR.bytes;
/* apply the mask */
apply_mask_to_region (&srcPR, &maskPR, brush_opacity);
}
#if 0
static void
paint_to_canvas_tiles (PaintCore *paint_core,
MaskBuf *brush_mask,
int brush_opacity)
{
PixelRegion srcPR, maskPR;
int x, y;
int xoff, yoff;
/* combine the brush mask and the canvas tiles */
pixel_region_init (&srcPR, canvas_tiles,
canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height, TRUE);
x = (int) paint_core->curx - (brush_mask->width >> 1);
y = (int) paint_core->cury - (brush_mask->height >> 1);
xoff = (x < 0) ? -x : 0;
yoff = (y < 0) ? -y : 0;
maskPR.bytes = 1;
maskPR.x = 0; maskPR.y = 0;
maskPR.w = srcPR.w;
maskPR.h = srcPR.h;
maskPR.rowstride = maskPR.bytes * brush_mask->width;
maskPR.data = mask_buf_data (brush_mask) + yoff * maskPR.rowstride + xoff * maskPR.bytes;
/* combine the mask and canvas tiles */
combine_mask_and_region (&srcPR, &maskPR, brush_opacity);
/* combine the canvas tiles and the canvas buf */
srcPR.bytes = canvas_buf->bytes;
srcPR.x = 0; srcPR.y = 0;
srcPR.w = canvas_buf->width;
srcPR.h = canvas_buf->height;
srcPR.rowstride = canvas_buf->width * canvas_buf->bytes;
srcPR.data = temp_buf_data (canvas_buf);
pixel_region_init (&maskPR, canvas_tiles,
canvas_buf->x, canvas_buf->y,
canvas_buf->width, canvas_buf->height, FALSE);
/* apply the canvas tiles to the canvas buf */
apply_mask_to_region (&srcPR, &maskPR, OPAQUE_OPACITY);
}
static void
paint_to_canvas_buf (PaintCore *paint_core,
MaskBuf *brush_mask,
int brush_opacity)
{
PixelRegion srcPR, maskPR;
int x, y;
int xoff, yoff;
x = (int) paint_core->curx - (brush_mask->width >> 1);
y = (int) paint_core->cury - (brush_mask->height >> 1);
xoff = (x < 0) ? -x : 0;
yoff = (y < 0) ? -y : 0;
/* combine the canvas buf and the brush mask to the canvas buf */
srcPR.bytes = canvas_buf->bytes;
srcPR.x = 0; srcPR.y = 0;
srcPR.w = canvas_buf->width;
srcPR.h = canvas_buf->height;
srcPR.rowstride = canvas_buf->width * canvas_buf->bytes;
srcPR.data = temp_buf_data (canvas_buf);
maskPR.bytes = 1;
maskPR.x = 0; maskPR.y = 0;
maskPR.w = srcPR.w;
maskPR.h = srcPR.h;
maskPR.rowstride = maskPR.bytes * brush_mask->width;
maskPR.data = mask_buf_data (brush_mask) + yoff * maskPR.rowstride + xoff * maskPR.bytes;
/* apply the mask */
apply_mask_to_region (&srcPR, &maskPR, brush_opacity);
}
#endif
static void
set_undo_tiles (GimpDrawable *drawable,
int x, int y, int w, int h)
{
int i, j;
Tile *src_tile;
Tile *dest_tile;
if (undo_tiles == NULL)
{
g_warning (_("set_undo_tiles: undo_tiles is null"));
return;
}
for (i = y; i < (y + h); i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < (x + w); j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
dest_tile = tile_manager_get_tile (undo_tiles, j, i, FALSE, FALSE);
if (tile_is_valid (dest_tile) == FALSE)
{
src_tile = tile_manager_get_tile (drawable_data (drawable), j, i, TRUE, FALSE);
tile_manager_map_tile (undo_tiles, j, i, src_tile);
tile_release (src_tile, FALSE);
}
}
}
}
static void
set_canvas_tiles (int x, int y, int w, int h)
{
int i, j;
Tile *tile;
for (i = y; i < (y + h); i += (TILE_HEIGHT - (i % TILE_HEIGHT)))
{
for (j = x; j < (x + w); j += (TILE_WIDTH - (j % TILE_WIDTH)))
{
tile = tile_manager_get_tile (canvas_tiles, j, i, FALSE, FALSE);
if (tile_is_valid (tile) == FALSE)
{
tile = tile_manager_get_tile (canvas_tiles, j, i, TRUE, TRUE);
memset (tile_data_pointer (tile, 0, 0), 0,
tile_size (tile));
tile_release (tile, TRUE);
}
}
}
}
/*****************************************************/
/* Paint buffers utility functions */
/*****************************************************/
static void
free_paint_buffers ()
{
if (orig_buf)
temp_buf_free (orig_buf);
orig_buf = NULL;
if (canvas_buf)
temp_buf_free (canvas_buf);
canvas_buf = NULL;
}
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