SDL 2.0
SDL_drawpoint.h File Reference
+ Include dependency graph for SDL_drawpoint.h:
+ This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Functions

int SDL_DrawPoint (SDL_Surface *dst, int x, int y, Uint32 color)
 
int SDL_DrawPoints (SDL_Surface *dst, const SDL_Point *points, int count, Uint32 color)
 

Function Documentation

◆ SDL_DrawPoint()

int SDL_DrawPoint ( SDL_Surface dst,
int  x,
int  y,
Uint32  color 
)

Definition at line 30 of file SDL_drawpoint.c.

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}
#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
#define SDL_SetError
#define SDL_Unsupported()
Definition: SDL_error.h:53
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
GLenum GLenum dst

References DRAW_FASTSETPIXELXY1, DRAW_FASTSETPIXELXY2, DRAW_FASTSETPIXELXY4, SDL_SetError, and SDL_Unsupported.

Referenced by SDL_DrawLines().

◆ SDL_DrawPoints()

int SDL_DrawPoints ( SDL_Surface dst,
const SDL_Point points,
int  count,
Uint32  color 
)

Definition at line 65 of file SDL_drawpoint.c.

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}
GLuint GLuint GLsizei count
Definition: SDL_opengl.h:1571
GLfixed GLfixed GLint GLint GLfixed points
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

References DRAW_FASTSETPIXELXY1, DRAW_FASTSETPIXELXY2, DRAW_FASTSETPIXELXY4, i, SDL_SetError, and SDL_Unsupported.

Referenced by SW_RunCommandQueue().