Mercurial > sdl-ios-xcode
view src/audio/SDL_mixer_MMX_VC.h @ 3707:d8308bc267bc
Adam Strzelecki to SDL
When graphic card has no GL_ARB_texture_rectangle YUV textures mapped with SDL_RenderCopy are stretched 2x horizontally, so only left half of texture is visible. This is due:
data->texw = (GLfloat) (texture->w) / texture_w;
data->texh = (GLfloat) texture->h / texture_h;
But afterwards texture_w /= 2 for YUV texture, but data->texw stays as it was before, while it should be multiplied 2x.
This bug can be seen in any program setting env variables: GL_APPLE_ycbcr_422=0 GL_EXT_texture_rectangle=0 GL_ARB_texture_rectangle=0
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 17 Feb 2010 04:42:52 +0000 |
| parents | f7b03b6838cb |
| children | b530ef003506 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2010 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA Sam Lantinga slouken@libsdl.org */ #include "SDL_config.h" #if defined(SDL_BUGGY_MMX_MIXERS) /* buggy, so we're disabling them. --ryan. */ #if ((defined(_MSC_VER) && defined(_M_IX86)) || defined(__WATCOMC__)) && defined(SDL_ASSEMBLY_ROUTINES) /* headers for MMX assembler version of SDL_MixAudio Copyright 2002 Stephane Marchesin (stephane.marchesin@wanadoo.fr) Converted to Intel ASM notation by Cth This code is licensed under the LGPL (see COPYING for details) Assumes buffer size in bytes is a multiple of 16 Assumes SDL_MIX_MAXVOLUME = 128 */ void SDL_MixAudio_MMX_S16_VC(char *, char *, unsigned int, int); void SDL_MixAudio_MMX_S8_VC(char *, char *, unsigned int, int); #endif #endif /* SDL_BUGGY_MMX_MIXERS */ /* vi: set ts=4 sw=4 expandtab: */