notgne2/tuxpaint-pencil-sharpener
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Emboss can now effect the entire canvas at once

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h/t @jpeg2k on Twitter for reminding me!
This commit is contained in:
Bill Kendrick 2021-09-18 00:27:54 -07:00
parent e1b80eb5d9
commit b82214c19c
2 changed files with 52 additions and 30 deletions
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4
docs/CHANGES.txt
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@ -8,7 +8,7 @@ http://www.tuxpaint.org/
$Id$
2021.September.17 (0.9.27)
2021.September.18 (0.9.27)
* New Magic Tools:
----------------
* "Opposite" -- Change parts of the picture to their complementary
@ -29,7 +29,7 @@ $Id$
color of the area of the picture being replaced, to give a
"newsprint" effect.
* "Halftone" can now affect the entire image at once.
* "Halftone" and "Emboss" can now affect the entire image at once.
* Other Improvements:
-------------------

78
magic/src/emboss.c
View file

@ -4,7 +4,7 @@
Emboss Magic Tool Plugin
Tux Paint - A simple drawing program for children.
Copyright (c) 2002-2019 by Bill Kendrick and others; see AUTHORS.txt
Copyright (c) 2002-2021 by Bill Kendrick and others; see AUTHORS.txt
bill@newbreedsoftware.com
http://www.tuxpaint.org/
@ -23,7 +23,7 @@
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
(See COPYING.txt)
Last updated: August 29, 2019
Last updated: September 18, 2021
$Id$
*/
@ -107,17 +107,44 @@ char *emboss_get_description(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBU
return (strdup(gettext_noop("Click and drag the mouse to emboss the picture.")));
}
// Do the effect:
static void do_emboss(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
{
// Do the effect (single pixel; used by do_emboss() (painted circle)
// and emboss_click() when in fullscreen mode):
static void emboss_pixel(void * ptr, SDL_Surface * last, int x, int y, SDL_Surface * canvas) {
magic_api *api = (magic_api *) ptr;
int xx, yy;
Uint8 r1, g1, b1, r2, g2, b2;
int r;
float h, s, v;
int avg1, avg2;
SDL_GetRGB(api->getpixel(last, x, y), last->format, &r1, &g1, &b1);
SDL_GetRGB(api->getpixel(last, x + 2, y + 2), last->format, &r2, &g2, &b2);
avg1 = (r1 + g1 + b1) / 3;
avg2 = (r2 + g2 + b2) / 3;
api->rgbtohsv(r1, g1, b1, &h, &s, &v);
r = 128 + (((avg1 - avg2) * 3) / 2);
if (r < 0)
r = 0;
if (r > 255)
r = 255;
v = (r / 255.0);
api->hsvtorgb(h, s, v, &r1, &g1, &b1);
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, r1, g1, b1));
}
// Do the effect (a circle around a touch point):
static void do_emboss(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
{
magic_api *api = (magic_api *) ptr;
int xx, yy;
for (yy = -16; yy < 16; yy++)
{
for (xx = -16; xx < 16; xx++)
@ -126,25 +153,7 @@ static void do_emboss(void *ptr, int which ATTRIBUTE_UNUSED, SDL_Surface * canva
{
if (!api->touched(x + xx, y + yy))
{
SDL_GetRGB(api->getpixel(last, x + xx, y + yy), last->format, &r1, &g1, &b1);
SDL_GetRGB(api->getpixel(last, x + xx + 2, y + yy + 2), last->format, &r2, &g2, &b2);
avg1 = (r1 + g1 + b1) / 3;
avg2 = (r2 + g2 + b2) / 3;
api->rgbtohsv(r1, g1, b1, &h, &s, &v);
r = 128 + (((avg1 - avg2) * 3) / 2);
if (r < 0)
r = 0;
if (r > 255)
r = 255;
v = (r / 255.0);
api->hsvtorgb(h, s, v, &r1, &g1, &b1);
api->putpixel(canvas, x + xx, y + yy, SDL_MapRGB(canvas->format, r1, g1, b1));
emboss_pixel(api, last, x + xx, y + yy, canvas);
}
}
}
@ -181,10 +190,23 @@ void emboss_drag(magic_api * api, int which, SDL_Surface * canvas,
}
// Affect the canvas on click:
void emboss_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
void emboss_click(magic_api * api, int which, int mode,
SDL_Surface * canvas, SDL_Surface * last, int x, int y, SDL_Rect * update_rect)
{
emboss_drag(api, which, canvas, last, x, y, x, y, update_rect);
if (mode == MODE_PAINT) {
emboss_drag(api, which, canvas, last, x, y, x, y, update_rect);
} else {
for (y = 0; y < canvas->h; y++) {
for (x = 0; x < canvas->w; x++) {
emboss_pixel(api, last, x, y, canvas);
}
}
update_rect->x = 0;
update_rect->y = 0;
update_rect->w = canvas->w;
update_rect->h = canvas->h;
api->playsound(emboss_snd, 128, 255);
}
}
// Affect the canvas on release:
@ -225,5 +247,5 @@ void emboss_switchout(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUS
int emboss_modes(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED)
{
return (MODE_PAINT); /* FIXME - Can also be turned into a full-image effect */
return (MODE_PAINT | MODE_FULLSCREEN);
}