1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20*/
21#include "../../SDL_internal.h"
22
23#if SDL_VIDEO_RENDER_SW && !SDL_RENDER_DISABLED
24
25#include "SDL_draw.h"
26#include "SDL_drawpoint.h"
27
28
29int
30SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color)
31{
32 if (!dst) {
33 return SDL_SetError("Passed NULL destination surface");
34 }
35
36 /* This function doesn't work on surfaces < 8 bpp */
37 if (dst->format->BitsPerPixel < 8) {
38 return SDL_SetError("SDL_DrawPoint(): Unsupported surface format");
39 }
40
41 /* Perform clipping */
42 if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
43 x >= (dst->clip_rect.x + dst->clip_rect.w) ||
44 y >= (dst->clip_rect.y + dst->clip_rect.h)) {
45 return 0;
46 }
47
48 switch (dst->format->BytesPerPixel) {
49 case 1:
50 DRAW_FASTSETPIXELXY1(x, y);
51 break;
52 case 2:
53 DRAW_FASTSETPIXELXY2(x, y);
54 break;
55 case 3:
56 return SDL_Unsupported();
57 case 4:
58 DRAW_FASTSETPIXELXY4(x, y);
59 break;
60 }
61 return 0;
62}
63
64int
65SDL_DrawPoints(SDL_Surface * dst, const SDL_Point * points, int count,
66 Uint32 color)
67{
68 int minx, miny;
69 int maxx, maxy;
70 int i;
71 int x, y;
72
73 if (!dst) {
74 return SDL_SetError("Passed NULL destination surface");
75 }
76
77 /* This function doesn't work on surfaces < 8 bpp */
78 if (dst->format->BitsPerPixel < 8) {
79 return SDL_SetError("SDL_DrawPoints(): Unsupported surface format");
80 }
81
82 minx = dst->clip_rect.x;
83 maxx = dst->clip_rect.x + dst->clip_rect.w - 1;
84 miny = dst->clip_rect.y;
85 maxy = dst->clip_rect.y + dst->clip_rect.h - 1;
86
87 for (i = 0; i < count; ++i) {
88 x = points[i].x;
89 y = points[i].y;
90
91 if (x < minx || x > maxx || y < miny || y > maxy) {
92 continue;
93 }
94
95 switch (dst->format->BytesPerPixel) {
96 case 1:
97 DRAW_FASTSETPIXELXY1(x, y);
98 break;
99 case 2:
100 DRAW_FASTSETPIXELXY2(x, y);
101 break;
102 case 3:
103 return SDL_Unsupported();
104 case 4:
105 DRAW_FASTSETPIXELXY4(x, y);
106 break;
107 }
108 }
109 return 0;
110}
111
112#endif /* SDL_VIDEO_RENDER_SW && !SDL_RENDER_DISABLED */
113
114/* vi: set ts=4 sw=4 expandtab: */
115