notgne2/tuxpaint-pencil-sharpener
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New Fill tool mode: Brush

Browse source 
Similar to solid fill (classic mode), but allows freehand
filling of an area.

Closes https://sourceforge.net/p/tuxpaint/feature-requests/207/
This commit is contained in:
Bill Kendrick 2021-10-19 00:26:26 -07:00
parent 910cd298e5
commit dcdebe9882
16 changed files with 152 additions and 6 deletions
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98
src/fill.c
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@ -27,7 +27,7 @@
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(See COPYING.txt)
Last updated: May 5, 2021
Last updated: October 18, 2021
$Id$
*/
@ -380,6 +380,102 @@ void draw_linear_gradient(SDL_Surface * canvas, SDL_Surface * last,
}
}
void draw_brush_fill_single(SDL_Surface * canvas, int x, int y, Uint32 draw_color, Uint8 * touched) {
int xx, yy;
for (yy = -16; yy < 16; yy++)
{
for (xx = -16; xx < 16; xx++)
{
if ((xx * xx) + (yy * yy) < (16 * 16) &&
touched[((y + yy) * canvas->w) + (x + xx)])
{
putpixels[canvas->format->BytesPerPixel] (canvas, x + xx, y + yy, draw_color);
}
}
}
}
void draw_brush_fill(SDL_Surface * canvas,
int x_left, int y_top, int x_right, int y_bottom,
int x1, int y1, int x2, int y2, Uint32 draw_color, Uint8 * touched,
int * up_x1, int * up_y1, int * up_x2, int * up_y2
) {
int xx, yy, x, y, dx, dy;
int orig_x1, orig_y1, orig_x2, orig_y2, tmp;
float m, b;
orig_x1 = x1;
orig_y1 = y1;
orig_x2 = x2;
orig_y2 = y2;
dx = x2 - x1;
dy = y2 - y1;
if (dx != 0)
{
m = ((float)dy) / ((float)dx);
b = y1 - m * x1;
if (x2 >= x1)
dx = 1;
else
dx = -1;
while (x1 != x2)
{
y1 = m * x1 + b;
y2 = m * (x1 + dx) + b;
if (y1 > y2)
{
for (y = y1; y >= y2; y--)
draw_brush_fill_single(canvas, x1, y, draw_color, touched);
}
else
{
for (y = y1; y <= y2; y++)
draw_brush_fill_single(canvas, x1, y, draw_color, touched);
}
x1 = x1 + dx;
}
}
else
{
if (y1 > y2)
{
y = y1;
y1 = y2;
y2 = y;
}
for (y = y1; y <= y2; y++)
draw_brush_fill_single(canvas, x1, y, draw_color, touched);
}
if (orig_x1 > orig_x2)
{
tmp = orig_x1;
orig_x1 = orig_x2;
orig_x2 = tmp;
}
if (orig_y1 > orig_y2)
{
tmp = orig_y1;
orig_y1 = orig_y2;
orig_y2 = tmp;
}
*up_x1 = orig_x1 - 16;
*up_y1 = orig_y1 - 16;
*up_x2 = orig_x2 + 16;
*up_y2 = orig_y2 + 16;
}
void draw_radial_gradient(SDL_Surface * canvas, int x_left, int y_top, int x_right, int y_bottom,
int x, int y, Uint32 draw_color, Uint8 * touched
) {