SDL_drawpoint.c
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if !SDL_RENDER_DISABLED
#include "SDL_draw.h"
#include "SDL_drawpoint.h"
int
SDL_DrawPoint(SDL_Surface * dst, int x, int y, Uint32 color)
{
if (!dst) {
return SDL_SetError("Passed NULL destination surface");
}
/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
return SDL_SetError("SDL_DrawPoint(): Unsupported surface format");
}
/* Perform clipping */
if (x < dst->clip_rect.x || y < dst->clip_rect.y ||
x >= (dst->clip_rect.x + dst->clip_rect.w) ||
y >= (dst->clip_rect.y + dst->clip_rect.h)) {
return 0;
}
switch (dst->format->BytesPerPixel) {
case 1:
DRAW_FASTSETPIXELXY1(x, y);
break;
case 2:
DRAW_FASTSETPIXELXY2(x, y);
break;
case 3:
return SDL_Unsupported();
case 4:
DRAW_FASTSETPIXELXY4(x, y);
break;
}
return 0;
}
int
SDL_DrawPoints(SDL_Surface * dst, const SDL_Point * points, int count,
Uint32 color)
{
int minx, miny;
int maxx, maxy;
int i;
int x, y;
if (!dst) {
return SDL_SetError("Passed NULL destination surface");
}
/* This function doesn't work on surfaces < 8 bpp */
if (dst->format->BitsPerPixel < 8) {
return SDL_SetError("SDL_DrawPoints(): Unsupported surface format");
}
minx = dst->clip_rect.x;
maxx = dst->clip_rect.x + dst->clip_rect.w - 1;
miny = dst->clip_rect.y;
maxy = dst->clip_rect.y + dst->clip_rect.h - 1;
for (i = 0; i < count; ++i) {
x = points[i].x;
y = points[i].y;
if (x < minx || x > maxx || y < miny || y > maxy) {
continue;
}
switch (dst->format->BytesPerPixel) {
case 1:
DRAW_FASTSETPIXELXY1(x, y);
break;
case 2:
DRAW_FASTSETPIXELXY2(x, y);
break;
case 3:
return SDL_Unsupported();
case 4:
DRAW_FASTSETPIXELXY4(x, y);
break;
}
}
return 0;
}
#endif /* !SDL_RENDER_DISABLED */
/* vi: set ts=4 sw=4 expandtab: */
dst
GLenum GLenum dst
Definition: SDL_opengl_glext.h:1737
x
GLint GLint GLint GLint GLint x
Definition: SDL_opengl.h:1574
SDL_PixelFormat::BytesPerPixel
Uint8 BytesPerPixel
Definition: SDL_pixels.h:320
count
GLuint GLuint GLsizei count
Definition: SDL_opengl.h:1571
DRAW_FASTSETPIXELXY1
#define DRAW_FASTSETPIXELXY1(x, y)
Definition: SDL_draw.h:42
DRAW_FASTSETPIXELXY4
#define DRAW_FASTSETPIXELXY4(x, y)
Definition: SDL_draw.h:44
SDL_Point
The structure that defines a point.
Definition: SDL_rect.h:48
SDL_Surface
A collection of pixels used in software blitting.
Definition: SDL_surface.h:69
Uint32
uint32_t Uint32
Definition: SDL_stdinc.h:181
points
GLfixed GLfixed GLint GLint GLfixed points
Definition: SDL_opengl_glext.h:4558
SDL_Point::x
int x
Definition: SDL_rect.h:50
SDL_Point::y
int y
Definition: SDL_rect.h:51
SDL_PixelFormat::BitsPerPixel
Uint8 BitsPerPixel
Definition: SDL_pixels.h:319
SDL_drawpoint.h
y
GLint GLint GLint GLint GLint GLint y
Definition: SDL_opengl.h:1574
SDL_Rect::x
int x
Definition: SDL_rect.h:66
SDL_Rect::w
int w
Definition: SDL_rect.h:67
SDL_Surface::clip_rect
SDL_Rect clip_rect
Definition: SDL_surface.h:85
i
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
DRAW_FASTSETPIXELXY2
#define DRAW_FASTSETPIXELXY2(x, y)
Definition: SDL_draw.h:43
SDL_Surface::format
SDL_PixelFormat * format
Definition: SDL_surface.h:72
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
SDL_DrawPoints
int SDL_DrawPoints(SDL_Surface *dst, const SDL_Point *points, int count, Uint32 color)
Definition: SDL_drawpoint.c:65
SDL_Rect::h
int h
Definition: SDL_rect.h:67
color
GLuint color
Definition: SDL_opengl_glext.h:1148
SDL_draw.h
SDL_Rect::y
int y
Definition: SDL_rect.h:66
SDL_Unsupported
#define SDL_Unsupported()
Definition: SDL_error.h:53
SDL_DrawPoint
int SDL_DrawPoint(SDL_Surface *dst, int x, int y, Uint32 color)
Definition: SDL_drawpoint.c:30