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annotate docs/man3/SDL_DisplayYUVOverlay.3 @ 1240:3b8a43c428bb

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From Bug #36: There are a couple of issues with the selection of Altivec alpha-blitting routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c. 1) There's no check for the presence of Altivec when checking if the Blit32to565PixelAlphaAltivec() routine can be selected. 2) Altivec cannot be used in video memory, and there's no check if the destination surface is a hardware surface. (Alpha-blitting to a hardware surface with GPU support is a bad idea, but somebody's bound to do it anyway.) Patch to fix these attached.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 08 Jan 2006 21:18:15 +0000
parents e5bc29de3f0a
children 546f7c1eb755
rev   line source
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1 .TH "SDL_DisplayYUVOverlay" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_DisplayYUVOverlay\- Blit the overlay to the display
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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_DisplayYUVOverlay\fP\fR(\fBSDL_Overlay *overlay, SDL_Rect *dstrect\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 Blit the \fBoverlay\fR to the surface specified when it was \fIcreated\fR\&. The \fI\fBSDL_Rect\fR\fR structure, \fBdstrect\fR, specifies the position and size of the destination\&. If the \fBdstrect\fR is a larger or smaller than the overlay then the overlay will be scaled, this is optimized for 2x scaling\&.
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12 .SH "RETURN VALUES"
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13 .PP
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14 Returns 0 on success
0
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15 .SH "SEE ALSO"
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16 .PP
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17 \fI\fBSDL_Overlay\fR\fR, \fI\fBSDL_CreateYUVOverlay\fP\fR
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18 ...\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01