SDL 2.0
SDL_drawpoint.c
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1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2019 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_RENDER_DISABLED
24
25#include "SDL_draw.h"
26#include "SDL_drawpoint.h"
27
28
29int
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:
51 break;
52 case 2:
54 break;
55 case 3:
56 return SDL_Unsupported();
57 case 4:
59 break;
60 }
61 return 0;
62}
63
64int
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:
98 break;
99 case 2:
101 break;
102 case 3:
103 return SDL_Unsupported();
104 case 4:
106 break;
107 }
108 }
109 return 0;
110}
111
112#endif /* !SDL_RENDER_DISABLED */
113
114/* vi: set ts=4 sw=4 expandtab: */
#define DRAW_FASTSETPIXELXY4(x, y)
Definition: SDL_draw.h:44
#define DRAW_FASTSETPIXELXY2(x, y)
Definition: SDL_draw.h:43
#define DRAW_FASTSETPIXELXY1(x, y)
Definition: SDL_draw.h:42
int SDL_DrawPoints(SDL_Surface *dst, const SDL_Point *points, int count, Uint32 color)
Definition: SDL_drawpoint.c:65
int SDL_DrawPoint(SDL_Surface *dst, int x, int y, Uint32 color)
Definition: SDL_drawpoint.c:30
#define SDL_SetError
#define SDL_Unsupported()
Definition: SDL_error.h:53
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
GLuint GLuint GLsizei count
Definition: SDL_opengl.h:1571
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
GLfixed GLfixed GLint GLint GLfixed points
GLuint color
GLenum GLenum dst
uint32_t Uint32
Definition: SDL_stdinc.h:203
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
The structure that defines a point (integer)
Definition: SDL_rect.h:49
A collection of pixels used in software blitting.
Definition: SDL_surface.h:71