1 | /* |
2 | Simple DirectMedia Layer |
3 | Copyright (C) 1997-2025 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 | #ifdef SDL_VIDEO_RENDER_SW |
24 | |
25 | #include "SDL_draw.h" |
26 | #include "SDL_drawpoint.h" |
27 | |
28 | bool SDL_DrawPoint(SDL_Surface *dst, int x, int y, Uint32 color) |
29 | { |
30 | if (!SDL_SurfaceValid(dst)) { |
31 | return SDL_InvalidParamError("SDL_DrawPoint(): dst" ); |
32 | } |
33 | |
34 | // This function doesn't work on surfaces < 8 bpp |
35 | if (dst->fmt->bits_per_pixel < 8) { |
36 | return SDL_SetError("SDL_DrawPoint(): Unsupported surface format" ); |
37 | } |
38 | |
39 | // Perform clipping |
40 | if (x < dst->clip_rect.x || y < dst->clip_rect.y || |
41 | x >= (dst->clip_rect.x + dst->clip_rect.w) || |
42 | y >= (dst->clip_rect.y + dst->clip_rect.h)) { |
43 | return true; |
44 | } |
45 | |
46 | switch (dst->fmt->bytes_per_pixel) { |
47 | case 1: |
48 | DRAW_FASTSETPIXELXY1(x, y); |
49 | break; |
50 | case 2: |
51 | DRAW_FASTSETPIXELXY2(x, y); |
52 | break; |
53 | case 3: |
54 | return SDL_Unsupported(); |
55 | case 4: |
56 | DRAW_FASTSETPIXELXY4(x, y); |
57 | break; |
58 | } |
59 | return true; |
60 | } |
61 | |
62 | bool SDL_DrawPoints(SDL_Surface *dst, const SDL_Point *points, int count, Uint32 color) |
63 | { |
64 | int minx, miny; |
65 | int maxx, maxy; |
66 | int i; |
67 | int x, y; |
68 | |
69 | if (!SDL_SurfaceValid(dst)) { |
70 | return SDL_InvalidParamError("SDL_DrawPoints(): dst" ); |
71 | } |
72 | |
73 | // This function doesn't work on surfaces < 8 bpp |
74 | if (dst->fmt->bits_per_pixel < 8) { |
75 | return SDL_SetError("SDL_DrawPoints(): Unsupported surface format" ); |
76 | } |
77 | |
78 | minx = dst->clip_rect.x; |
79 | maxx = dst->clip_rect.x + dst->clip_rect.w - 1; |
80 | miny = dst->clip_rect.y; |
81 | maxy = dst->clip_rect.y + dst->clip_rect.h - 1; |
82 | |
83 | for (i = 0; i < count; ++i) { |
84 | x = points[i].x; |
85 | y = points[i].y; |
86 | |
87 | if (x < minx || x > maxx || y < miny || y > maxy) { |
88 | continue; |
89 | } |
90 | |
91 | switch (dst->fmt->bytes_per_pixel) { |
92 | case 1: |
93 | DRAW_FASTSETPIXELXY1(x, y); |
94 | break; |
95 | case 2: |
96 | DRAW_FASTSETPIXELXY2(x, y); |
97 | break; |
98 | case 3: |
99 | return SDL_Unsupported(); |
100 | case 4: |
101 | DRAW_FASTSETPIXELXY4(x, y); |
102 | break; |
103 | } |
104 | } |
105 | return true; |
106 | } |
107 | |
108 | #endif // SDL_VIDEO_RENDER_SW |
109 | |