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Patch from Antonio SJ Musumeci: " This code with SDL-1.2.8 and CVS: #include <stdio.h> #include <stdlib.h> #include <SDL.h> int main(int argc, char** argv) { char alphabet[26] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; char buffer_file[27] = {0}; char buffer_mem[27] = {0}; int rv_file; int rv_mem; FILE* file_ptr; SDL_RWops* rwop_file; SDL_RWops* rwop_mem; file_ptr = fopen("./blah", "w"); fwrite(alphabet, 1, sizeof(alphabet), file_ptr); fclose(file_ptr); rwop_mem = SDL_RWFromMem(alphabet, sizeof(alphabet)); rwop_file = SDL_RWFromFile("./blah", "r"); rv_mem = SDL_RWread(rwop_mem , buffer_mem, 5, 6); rv_file = SDL_RWread(rwop_file, buffer_file, 5, 6); printf("From File: %d %s\n" "From Mem: %d %s\n", rv_file, buffer_file, rv_mem, buffer_mem); printf("Seek end of File: %d\n" "Seek end of Mem: %d\n", SDL_RWseek(rwop_file, 0, SEEK_END), SDL_RWseek(rwop_mem , 0, SEEK_END)); SDL_RWclose(rwop_file); SDL_RWclose(rwop_mem); return 0; } Produces this output: From File: 5 ABCDEFGHIJKLMNOPQRSTUVWXYZ From Mem: 5 ABCDEFGHIJKLMNOPQRSTUVWXY Seek end of File: 26 Seek end of Mem: 26 " --ryan.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 24 Jun 2005 12:48:38 +0000
parents 355632dca928
children
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<HTML
><HEAD
><TITLE
>SDL_MouseButtonEvent</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
"><LINK
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>SDL Library Documentation</TH
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><A
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>Prev</A
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><HR
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><H1
><A
NAME="SDLMOUSEBUTTONEVENT"
></A
>SDL_MouseButtonEvent</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN4144"
></A
><H2
>Name</H2
>SDL_MouseButtonEvent&nbsp;--&nbsp;Mouse button event structure</DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4147"
></A
><H2
>Structure Definition</H2
><PRE
CLASS="PROGRAMLISTING"
>typedef struct{
  Uint8 type;
  Uint8 button;
  Uint8 state;
  Uint16 x, y;
} SDL_MouseButtonEvent;</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4150"
></A
><H2
>Structure Data</H2
><DIV
CLASS="INFORMALTABLE"
><A
NAME="AEN4152"
></A
><P
></P
><TABLE
BORDER="0"
CLASS="CALSTABLE"
><TBODY
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="STRUCTFIELD"
><I
>type</I
></TT
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="LITERAL"
>SDL_MOUSEBUTTONDOWN</TT
> or <TT
CLASS="LITERAL"
>SDL_MOUSEBUTTONUP</TT
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="STRUCTFIELD"
><I
>button</I
></TT
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>The mouse button index (SDL_BUTTON_LEFT, SDL_BUTTON_MIDDLE, SDL_BUTTON_RIGHT)</TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="STRUCTFIELD"
><I
>state</I
></TT
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="LITERAL"
>SDL_PRESSED</TT
> or <TT
CLASS="LITERAL"
>SDL_RELEASED</TT
></TD
></TR
><TR
><TD
ALIGN="LEFT"
VALIGN="TOP"
><TT
CLASS="STRUCTFIELD"
><I
>x</I
></TT
>, <TT
CLASS="STRUCTFIELD"
><I
>y</I
></TT
></TD
><TD
ALIGN="LEFT"
VALIGN="TOP"
>The X/Y coordinates of the mouse at press/release time</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4176"
></A
><H2
>Description</H2
><P
><SPAN
CLASS="STRUCTNAME"
>SDL_MouseButtonEvent</SPAN
> is a member of the <A
HREF="sdlevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Event</SPAN
></A
> union and is used when an event of type <TT
CLASS="LITERAL"
>SDL_MOUSEBUTTONDOWN</TT
> or <TT
CLASS="LITERAL"
>SDL_MOUSEBUTTONUP</TT
> is reported.</P
><P
>When a mouse button press or release is detected then number of the button pressed (from 1 to 255, with 1 usually being the left button and 2 the right) is placed into <TT
CLASS="STRUCTFIELD"
><I
>button</I
></TT
>, the position of the mouse when this event occured is stored in the <TT
CLASS="STRUCTFIELD"
><I
>x</I
></TT
> and the <TT
CLASS="STRUCTFIELD"
><I
>y</I
></TT
> fields. Like <A
HREF="sdlkeyboardevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_KeyboardEvent</SPAN
></A
>, information on whether the event was a press or a release event is stored in both the <TT
CLASS="STRUCTFIELD"
><I
>type</I
></TT
> and <TT
CLASS="STRUCTFIELD"
><I
>state</I
></TT
> fields, but this should be obvious.</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN4192"
></A
><H2
>See Also</H2
><P
><A
HREF="sdlevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_Event</SPAN
></A
>,
<A
HREF="sdlmousemotionevent.html"
><SPAN
CLASS="STRUCTNAME"
>SDL_MouseMotionEvent</SPAN
></A
></P
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