Mercurial > molko

annotate src/libmlk-core/core/painter.c @ 378:460c78706989

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
misc: update copyright years
author David Demelier <markand@malikania.fr>
date Sun, 02 Jan 2022 10:22:48 +0100
parents 8f9937403749
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
1 /*
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
2 * painter.c -- basic drawing routines
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
3 *
378
460c78706989 misc: update copyright years
David Demelier <markand@malikania.fr>
parents: 320
diff changeset
4 * Copyright (c) 2020-2022 David Demelier <markand@malikania.fr>
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
5 *
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
6 * Permission to use, copy, modify, and/or distribute this software for any
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
7 * purpose with or without fee is hereby granted, provided that the above
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
8 * copyright notice and this permission notice appear in all copies.
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
9 *
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
17 */
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
18
106
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
19 #include <math.h>
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
20
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
21 #include "color.h"
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
22 #include "painter.h"
94
ed72843a7194 core: simplify font/texture interfaces
David Demelier <markand@malikania.fr>
parents: 59
diff changeset
23 #include "texture.h"
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
24 #include "window.h"
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
25 #include "window_p.h"
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
26
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
27 /* Current texture renderer. */
41
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
28 static struct texture *renderer;
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
29
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
30 struct texture *
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
31 painter_get_target(void)
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
32 {
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
33 return renderer;
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
34 }
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
35
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
36 void
41
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
37 painter_set_target(struct texture *tex)
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
38 {
41
3996f873a54b core: implement walksprite, closes #2455
David Demelier <markand@malikania.fr>
parents: 28
diff changeset
39 renderer = tex;
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
40 SDL_SetRenderTarget(RENDERER(), tex ? tex->handle : NULL);
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
41 }
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
42
46
b815621df3e3 core: remove all fixed width integers, closes #2460
David Demelier <markand@malikania.fr>
parents: 41
diff changeset
43 unsigned long
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
44 painter_get_color(void)
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
45 {
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
46 Uint8 r = 0, g = 0, b = 0, a = 0;
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
47
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
48 SDL_GetRenderDrawColor(RENDERER(), &r, &g, &b, &a);
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
49
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
50 return COLOR_HEX(r, g, b, a);
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
51 }
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
52
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
53 void
46
b815621df3e3 core: remove all fixed width integers, closes #2460
David Demelier <markand@malikania.fr>
parents: 41
diff changeset
54 painter_set_color(unsigned long color)
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
55 {
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
56 SDL_SetRenderDrawColor(
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
57 RENDERER(),
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
58 COLOR_R(color),
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
59 COLOR_G(color),
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
60 COLOR_B(color),
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
61 COLOR_A(color)
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
62 );
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
63 }
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
64
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
65 void
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
66 painter_draw_line(int x1, int y1, int x2, int y2)
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
67 {
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
68 SDL_RenderDrawLine(RENDERER(), x1, y1, x2, y2);
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
69 }
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
70
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
71 void
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
72 painter_draw_point(int x1, int y1)
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
73 {
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
74 SDL_RenderDrawPoint(RENDERER(), x1, y1);
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
75 }
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
76
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
77 void
96
04011a942e3b painter: simplify API
David Demelier <markand@malikania.fr>
parents: 94
diff changeset
78 painter_draw_rectangle(int x, int y, unsigned int width, unsigned int height)
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
79 {
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
80 const SDL_Rect rect = {
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
81 .w = width,
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
82 .h = height,
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
83 .x = x,
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
84 .y = y
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
85 };
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
86
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
87 SDL_RenderFillRect(RENDERER(), &rect);
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
88 }
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
89
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
90 void
106
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
91 painter_draw_circle(int x, int y, int radius)
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
92 {
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
93 // Note that there is more to altering the bitrate of this
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
94 // method than just changing this value. See how pixels are
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
95 // altered at the following web page for tips:
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
96 // http://www.libsdl.org/intro.en/usingvideo.html
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
97 for (double dy = 1; dy <= radius; dy += 1.0) {
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
98 double dx = floor(sqrt((2.0 * radius * dy) - (dy * dy)));
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
99
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
100 SDL_RenderDrawLine(RENDERER(), x - dx, y + dy - radius, x + dx, y + dy - radius);
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
101 SDL_RenderDrawLine(RENDERER(), x - dx, y - dy + radius, x + dx, y - dy + radius);
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
102 }
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
103 }
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
104
ed1a6bb02a78 inventory_dialog: use a small circle as test
David Demelier <markand@malikania.fr>
parents: 97
diff changeset
105 void
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
106 painter_clear(void)
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
107 {
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
108 SDL_RenderClear(RENDERER());
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
109 }
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
110
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
111 void
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
112 painter_present(void)
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
113 {
97
58133933ea17 window: expose some data to avoid functions
David Demelier <markand@malikania.fr>
parents: 96
diff changeset
114 SDL_RenderPresent(RENDERER());
28
783841af4033 core: implement painter API, closes #2451 @1h
David Demelier <markand@malikania.fr>
parents:
diff changeset
115 }