This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_drawpoint.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2009 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_draw.h"
int
SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color)
{
/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
SDL_SetError("SDL_DrawLine(): Unsupported surface format");
return (-1);
}
/* Perform clipping */
if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
x >= (dst->clip_rect.x + dst->clip_rect.w) ||
y >= (dst->clip_rect.y + dst->clip_rect.h)) {
return 0;
}
switch (dst->format->BytesPerPixel) {
case 1:
DRAW_FASTSETPIXEL1(x, y);
break;
case 2:
DRAW_FASTSETPIXEL2(x, y);
break;
case 3:
SDL_Unsupported();
return -1;
case 4:
DRAW_FASTSETPIXEL4(x, y);
break;
}
return 0;
}
/* vi: set ts=4 sw=4 expandtab: */