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annotate docs/man3/SDL_ShowCursor.3 @ 688:c0522010bb6d

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Date: Tue, 12 Aug 2003 14:26:19 +0200 (MEST) From: "Mattias Engdeg?rd" Subject: bug in SDL_GetRGB/GetRGBA There's an embarrassing bug in GetRGB/GetRGBA which apparently has been there for years. It incorrectly converts colours with < 8 bits/channel. It came to my attention today in #sdl. What it does now is (for each channel): rv = (pixel & fmt->Rmask) >> fmt->Rshift; *r = (rv << fmt->Rloss) + (rv >> (8 - fmt->Rloss)); which is wrong; the last line should be *r = (rv << fmt->Rloss) + (rv >> (8 - (fmt->Rloss << 1)));
author Sam Lantinga <slouken@libsdl.org>
date Tue, 12 Aug 2003 15:17:20 +0000
parents e5bc29de3f0a
children 546f7c1eb755
rev   line source
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e5bc29de3f0a Updated from the SDL Documentation Project
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1 .TH "SDL_ShowCursor" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_ShowCursor\- Toggle whether or not the cursor is shown on the screen\&.
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4 .SH "SYNOPSIS"
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5 .PP
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6 \fB#include "SDL\&.h"
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7 .sp
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8 \fBint \fBSDL_ShowCursor\fP\fR(\fBint toggle\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 Toggle whether or not the cursor is shown on the screen\&. Passing \fBSDL_ENABLE\fP displays the cursor and passing \fBSDL_DISABLE\fP hides it\&. The current state of the mouse cursor can be queried by passing \fBSDL_QUERY\fP, either \fBSDL_DISABLE\fP or \fBSDL_ENABLE\fP will be returned\&.
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12 .PP
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13 The cursor starts off displayed, but can be turned off\&.
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14 .SH "RETURN VALUE"
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15 .PP
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16 Returns the current state of the cursor\&.
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17 .SH "SEE ALSO"
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18 .PP
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19 \fI\fBSDL_CreateCursor\fP\fR, \fI\fBSDL_SetCursor\fP\fR
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20 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01