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view docs/man3/SDL_CreateCursor.3 @ 1120:8e1fde455471
Patch by me to fix crash described below.
--ryan.
To: sdl@libsdl.org
From: Rainer Deyke <rainerd@eldwood.com>
Date: Tue, 16 Aug 2005 01:08:18 -0600
Subject: [SDL] Bug report: SDL_CreateRGBSurface with SDL_HWSURFACE crashes
If SDL is in full-screen mode with a hardware video surface on OS X,
SDL_CreateRGBSurface with SDL_HWSURFACE crashes. The crash occurs on
line 109 of SDL_Surface.c. This was tested on OS X 10.3.9 with both SDL
1.2.8 and the latest CVS. Here is a small C++ program that demonstrates
the problem:
#include "SDL.h"
#include <stdio.h>
namespace {
void wait_for_key()
{
SDL_Event e;
printf("%d\n", SDL_GetAppState());
while (SDL_WaitEvent(&e)) {
if (e.type == SDL_KEYDOWN || e.type == SDL_QUIT) return;
}
}
}
int main(int, char *[])
{
SDL_Init(SDL_INIT_VIDEO);
SDL_Surface *screen
= SDL_SetVideoMode(640, 480, 32, SDL_FULLSCREEN | SDL_HWSURFACE);
SDL_Surface *s = SDL_CreateRGBSurface(SDL_HWSURFACE, 640, 480, 32,
screen->format->Rmask, screen->format->Gmask,
screen->format->Bmask, screen->format->Amask);
wait_for_key();
if (s) SDL_FreeSurface(s);
SDL_Quit();
printf("Success!\n");
return 0;
}
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Thu, 18 Aug 2005 06:46:32 +0000 |
| parents | e5bc29de3f0a |
| children | 546f7c1eb755 |
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