Mercurial > sdl-ios-xcode

view docs/man3/SDL_CreateCursor.3 @ 2884:9dde605c7540

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Date: Fri, 19 Dec 2008 20:17:35 +0100 From: Couriersud Subject: Re: Aw: Experience using SDL1.3 in sdlmame/Proposal for api additions > For consistency you'd probably want: > SDL_SetRenderDrawColor(Uint8 r, Uint8 g, Uint8 b, Uint8 a); > SDL_SetRenderDrawBlendMode(SDL_BlendMode blendMode); > SDL_RenderLine(int x1, int y1, int x2, int y2); > SDL_RenderFill(SDL_Rect *rect); > > You probably also want to add API functions query the current state. > I have implemented the above api for the opengl, x11, directfb and software renderers. I have also renamed *TEXTUREBLENDMODE* constants to BLENDMODE*. The unix build compiles. The windows renderer still needs to be updated, but I have no windows development machine at hand. Have a look at the x11 renderer for a sample. Vector games now run at 90% both on opengl and directfb in comparison to sdlmame's own opengl renderer. The same applies to raster games. The diff also includes a) Changed XDrawRect to XFillRect in x11 renderer b) A number of changes to fix blending and modulation issues in the directfb renderer.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 20 Dec 2008 12:00:00 +0000
parents 546f7c1eb755
children 1238da4a7112
line wrap: on
line source

.TH "SDL_CreateCursor" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference" 
.SH "NAME"
SDL_CreateCursor \- Creates a new mouse cursor\&.
.SH "SYNOPSIS"
.PP
\fB#include "SDL\&.h"
.sp
\fBSDL_Cursor *\fBSDL_CreateCursor\fP\fR(\fBUint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y\fR);
.SH "DESCRIPTION"
.PP
Create a cursor using the specified \fBdata\fR and \fBmask\fR (in MSB format)\&. The cursor width must be a multiple of 8 bits\&.
.PP
The cursor is created in black and white according to the following: 
.TP 20
\fBData / Mask\fR
\fBResulting pixel on screen\fR
.TP 20
0 / 1
White
.TP 20
1 / 1
Black
.TP 20
0 / 0
Transparent
.TP 20
1 / 0
Inverted color if possible, black if not\&.
.PP
Cursors created with this function must be freed with \fISDL_FreeCursor\fR\&.
.SH "EXAMPLE"
.PP
.nf
\f(CW/* Stolen from the mailing list */
/* Creates a new mouse cursor from an XPM */


/* XPM */
static const char *arrow[] = {
  /* width height num_colors chars_per_pixel */
  "    32    32        3            1",
  /* colors */
  "X c #000000",
  "\&. c #ffffff",
  "  c None",
  /* pixels */
  "X                               ",
  "XX                              ",
  "X\&.X                             ",
  "X\&.\&.X                            ",
  "X\&.\&.\&.X                           ",
  "X\&.\&.\&.\&.X                          ",
  "X\&.\&.\&.\&.\&.X                         ",
  "X\&.\&.\&.\&.\&.\&.X                        ",
  "X\&.\&.\&.\&.\&.\&.\&.X                       ",
  "X\&.\&.\&.\&.\&.\&.\&.\&.X                      ",
  "X\&.\&.\&.\&.\&.XXXXX                     ",
  "X\&.\&.X\&.\&.X                         ",
  "X\&.X X\&.\&.X                        ",
  "XX  X\&.\&.X                        ",
  "X    X\&.\&.X                       ",
  "     X\&.\&.X                       ",
  "      X\&.\&.X                      ",
  "      X\&.\&.X                      ",
  "       XX                       ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "                                ",
  "0,0"
};

static SDL_Cursor *init_system_cursor(const char *image[])
{
  int i, row, col;
  Uint8 data[4*32];
  Uint8 mask[4*32];
  int hot_x, hot_y;

  i = -1;
  for ( row=0; row<32; ++row ) {
    for ( col=0; col<32; ++col ) {
      if ( col % 8 ) {
        data[i] <<= 1;
        mask[i] <<= 1;
      } else {
        ++i;
        data[i] = mask[i] = 0;
      }
      switch (image[4+row][col]) {
        case \&'X\&':
          data[i] |= 0x01;
          k[i] |= 0x01;
          break;
        case \&'\&.\&':
          mask[i] |= 0x01;
          break;
        case \&' \&':
          break;
      }
    }
  }
  sscanf(image[4+row], "%d,%d", &hot_x, &hot_y);
  return SDL_CreateCursor(data, mask, 32, 32, hot_x, hot_y);
}\fR
.fi
.PP
.SH "SEE ALSO"
.PP
\fI\fBSDL_FreeCursor\fP\fR, \fI\fBSDL_SetCursor\fP\fR, \fI\fBSDL_ShowCursor\fP\fR
...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01