src/render/SDL_yuv_sw_c.h
author Sylvain Becker <sylvain.becker@gmail.com>
Sun, 23 Feb 2020 09:59:52 +0100
changeset 13544 c66d1c7700bd
parent 13422 fd6a12de91c7
permissions -rw-r--r--
Fixed bug 4999 - Palette surface always promoted to alpha (Thanks Cameron Gutman!)

MSVC Static analysis: Incorrect alpha_value check in SDL_render.c
(see also bug 4425)
     1 /*
     2   Simple DirectMedia Layer
     3   Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
     4 
     5   This software is provided 'as-is', without any express or implied
     6   warranty.  In no event will the authors be held liable for any damages
     7   arising from the use of this software.
     8 
     9   Permission is granted to anyone to use this software for any purpose,
    10   including commercial applications, and to alter it and redistribute it
    11   freely, subject to the following restrictions:
    12 
    13   1. The origin of this software must not be misrepresented; you must not
    14      claim that you wrote the original software. If you use this software
    15      in a product, an acknowledgment in the product documentation would be
    16      appreciated but is not required.
    17   2. Altered source versions must be plainly marked as such, and must not be
    18      misrepresented as being the original software.
    19   3. This notice may not be removed or altered from any source distribution.
    20 */
    21 
    22 #ifndef SDL_yuv_sw_c_h_
    23 #define SDL_yuv_sw_c_h_
    24 
    25 #include "../SDL_internal.h"
    26 
    27 #include "SDL_video.h"
    28 
    29 /* This is the software implementation of the YUV texture support */
    30 
    31 struct SDL_SW_YUVTexture
    32 {
    33     Uint32 format;
    34     Uint32 target_format;
    35     int w, h;
    36     Uint8 *pixels;
    37 
    38     /* These are just so we don't have to allocate them separately */
    39     Uint16 pitches[3];
    40     Uint8 *planes[3];
    41 
    42     /* This is a temporary surface in case we have to stretch copy */
    43     SDL_Surface *stretch;
    44     SDL_Surface *display;
    45 };
    46 
    47 typedef struct SDL_SW_YUVTexture SDL_SW_YUVTexture;
    48 
    49 SDL_SW_YUVTexture *SDL_SW_CreateYUVTexture(Uint32 format, int w, int h);
    50 int SDL_SW_QueryYUVTexturePixels(SDL_SW_YUVTexture * swdata, void **pixels,
    51                                  int *pitch);
    52 int SDL_SW_UpdateYUVTexture(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
    53                             const void *pixels, int pitch);
    54 int SDL_SW_UpdateYUVTexturePlanar(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
    55                                   const Uint8 *Yplane, int Ypitch,
    56                                   const Uint8 *Uplane, int Upitch,
    57                                   const Uint8 *Vplane, int Vpitch);
    58 int SDL_SW_LockYUVTexture(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
    59                           void **pixels, int *pitch);
    60 void SDL_SW_UnlockYUVTexture(SDL_SW_YUVTexture * swdata);
    61 int SDL_SW_CopyYUVToRGB(SDL_SW_YUVTexture * swdata, const SDL_Rect * srcrect,
    62                         Uint32 target_format, int w, int h, void *pixels,
    63                         int pitch);
    64 void SDL_SW_DestroyYUVTexture(SDL_SW_YUVTexture * swdata);
    65 
    66 /* FIXME: This breaks on various versions of GCC and should be rewritten using intrinsics */
    67 #if 0 /* (__GNUC__ > 2) && defined(__i386__) && __OPTIMIZE__ && SDL_ASSEMBLY_ROUTINES && !defined(__clang__) */
    68 #define USE_MMX_ASSEMBLY 1
    69 #endif
    70 
    71 #endif /* SDL_yuv_sw_c_h_ */
    72 
    73 /* vi: set ts=4 sw=4 expandtab: */