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
28bool 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
62bool 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