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annotate src/video/SDL_yuv_sw_c.h @ 4590:1ad70fb49fcb

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Fix so many things that there is little place in this column to list them all but the result is that blending modes just work now for drawing primitives. Fixes involved: 1. Fix handling of alpha channel when SDL_BLENDMODE_NONE is set. 2. Make xrendercolor use floating-point values for color channels and then convert to 16 bit ints. 3. Fix handling of visuals in SDL_x11modes.c so that a 32 bit ARGB visual is used. 4. Fix the background pixel value in SDL_x11window.c so that the window background has an alpha value of 0xFF and not 0.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Fri, 09 Jul 2010 21:36:41 +0530
parents f7b03b6838cb
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 #include "SDL_video.h"
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25 #include "SDL_sysvideo.h"
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26
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27 /* This is the software implementation of the YUV texture support */
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28
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29 struct SDL_SW_YUVTexture
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30 {
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31 Uint32 format;
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32 Uint32 target_format;
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33 int w, h;
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34 Uint8 *pixels;
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35 int *colortab;
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36 Uint32 *rgb_2_pix;
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37 void (*Display1X) (int *colortab, Uint32 * rgb_2_pix,
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38 unsigned char *lum, unsigned char *cr,
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39 unsigned char *cb, unsigned char *out,
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40 int rows, int cols, int mod);
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41 void (*Display2X) (int *colortab, Uint32 * rgb_2_pix,
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42 unsigned char *lum, unsigned char *cr,
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43 unsigned char *cb, unsigned char *out,
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44 int rows, int cols, int mod);
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45
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46 /* These are just so we don't have to allocate them separately */
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47 Uint16 pitches[3];
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48 Uint8 *planes[3];
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49
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50 /* This is a temporary surface in case we have to stretch copy */
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51 SDL_Surface *stretch;
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52 SDL_Surface *display;
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53 };
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54
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55 typedef struct SDL_SW_YUVTexture SDL_SW_YUVTexture;
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56
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57 SDL_SW_YUVTexture *SDL_SW_CreateYUVTexture(Uint32 format, int w, int h);
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58 int SDL_SW_QueryYUVTexturePixels(SDL_SW_YUVTexture * swdata, void **pixels,
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59 int *pitch);
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60 int SDL_SW_UpdateYUVTexture(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
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61 const void *pixels, int pitch);
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62 int SDL_SW_LockYUVTexture(SDL_SW_YUVTexture * swdata, const SDL_Rect * rect,
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63 int markDirty, void **pixels, int *pitch);
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64 void SDL_SW_UnlockYUVTexture(SDL_SW_YUVTexture * swdata);
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65 int SDL_SW_CopyYUVToRGB(SDL_SW_YUVTexture * swdata, const SDL_Rect * srcrect,
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66 Uint32 target_format, int w, int h, void *pixels,
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67 int pitch);
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68 void SDL_SW_DestroyYUVTexture(SDL_SW_YUVTexture * swdata);
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69
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70 /* vi: set ts=4 sw=4 expandtab: */