Mercurial > sdl-ios-xcode
view include/SDL_cpuinfo.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> |
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date | Wed, 17 Feb 2010 04:42:52 +0000 |
parents | f7b03b6838cb |
children | 427998ff3bcf |
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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 */ /** * \file SDL_cpuinfo.h * * CPU feature detection for SDL. */ #ifndef _SDL_cpuinfo_h #define _SDL_cpuinfo_h #include "SDL_stdinc.h" #include "begin_code.h" /* Set up for C function definitions, even when using C++ */ #ifdef __cplusplus /* *INDENT-OFF* */ extern "C" { /* *INDENT-ON* */ #endif /** * This function returns the number of CPU cores available. */ extern DECLSPEC int SDLCALL SDL_GetCPUCount(void); /** * This function returns true if the CPU has the RDTSC instruction. */ extern DECLSPEC SDL_bool SDLCALL SDL_HasRDTSC(void); /** * This function returns true if the CPU has MMX features. */ extern DECLSPEC SDL_bool SDLCALL SDL_HasMMX(void); /** * This function returns true if the CPU has MMX Ext.\ features. */ extern DECLSPEC SDL_bool SDLCALL SDL_HasMMXExt(void); /** * This function returns true if the CPU has 3DNow!\ features. */ extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNow(void); /** * This function returns true if the CPU has 3DNow!\ Ext.\ features. */ extern DECLSPEC SDL_bool SDLCALL SDL_Has3DNowExt(void); /** * This function returns true if the CPU has SSE features. */ extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE(void); /** * This function returns true if the CPU has SSE2 features. */ extern DECLSPEC SDL_bool SDLCALL SDL_HasSSE2(void); /** * This function returns true if the CPU has AltiVec features. */ extern DECLSPEC SDL_bool SDLCALL SDL_HasAltiVec(void); /* Ends C function definitions when using C++ */ #ifdef __cplusplus /* *INDENT-OFF* */ } /* *INDENT-ON* */ #endif #include "close_code.h" #endif /* _SDL_cpuinfo_h */ /* vi: set ts=4 sw=4 expandtab: */