annotate include/SDL_surface.h @ 3389:3fe2248fde37

Fixed OpenGL ES primitive alpha blending.
author Mike Gorchak <lestat@i.com.ua>
date Tue, 13 Oct 2009 06:28:31 +0000
parents 710139a1692d
children d3baf5ac4e37
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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
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23 /**
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24 * \file SDL_surface.h
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25 *
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26 * Header file for SDL_surface definition and management functions
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27 */
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28
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29 #ifndef _SDL_surface_h
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30 #define _SDL_surface_h
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31
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32 #include "SDL_stdinc.h"
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33 #include "SDL_pixels.h"
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34 #include "SDL_rect.h"
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35 #include "SDL_rwops.h"
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36
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37 #include "begin_code.h"
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38 /* Set up for C function definitions, even when using C++ */
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39 #ifdef __cplusplus
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40 /* *INDENT-OFF* */
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41 extern "C" {
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42 /* *INDENT-ON* */
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43 #endif
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44
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45 /** These are the currently supported flags for the SDL_surface
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46 * \internal Used internally (read-only)
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47 */
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48 /*@{*/
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49 #define SDL_PREALLOC 0x00000001 /**< Surface uses preallocated memory */
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50 #define SDL_RLEACCEL 0x00000002 /**< Surface is RLE encoded */
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51 /*@}*/
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52
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53 /** Evaluates to true if the surface needs to be locked before access */
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54 #define SDL_MUSTLOCK(S) (((S)->flags & SDL_RLEACCEL) != 0)
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55
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56 /**
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57 * \brief A collection of pixels used in software blitting
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58 *
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59 * \note This structure should be treated as read-only, except for 'pixels',
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60 * which, if not NULL, contains the raw pixel data for the surface.
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61 */
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62 typedef struct SDL_Surface
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63 {
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64 Uint32 flags; /**< Read-only */
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65 SDL_PixelFormat *format; /**< Read-only */
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66 int w, h; /**< Read-only */
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67 int pitch; /**< Read-only */
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68 void *pixels; /**< Read-write */
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69
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70 /* Application data associated with the surfade */
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71 void *userdata; /**< Read-write */
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72
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73 /* information needed for surfaces requiring locks */
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74 int locked; /**< Read-only */
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75 void *lock_data; /**< Read-only */
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76
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77 /* clipping information */
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78 SDL_Rect clip_rect; /**< Read-only */
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79
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80 /* info for fast blit mapping to other surfaces */
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81 struct SDL_BlitMap *map; /**< Private */
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82
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83 /* format version, bumped at every change to invalidate blit maps */
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84 unsigned int format_version; /**< Private */
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85
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86 /* Reference count -- used when freeing surface */
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87 int refcount; /**< Read-mostly */
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88 } SDL_Surface;
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89
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90 /**
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91 * \brief The type of function used for surface blitting functions
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92 */
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93 typedef int (*SDL_blit) (struct SDL_Surface * src, SDL_Rect * srcrect,
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94 struct SDL_Surface * dst, SDL_Rect * dstrect);
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95
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96 /**
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97 * Allocate and free an RGB surface (must be called after SDL_SetVideoMode)
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98 * If the depth is 4 or 8 bits, an empty palette is allocated for the surface.
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99 * If the depth is greater than 8 bits, the pixel format is set using the
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100 * flags '[RGB]mask'.
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101 * If the function runs out of memory, it will return NULL.
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102 *
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103 * \param flags The 'flags' are obsolete and should be set to 0.
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104 */
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105 extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurface
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106 (Uint32 flags, int width, int height, int depth,
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107 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
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108 extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceFrom(void *pixels,
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109 int width,
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110 int height,
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111 int depth,
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112 int pitch,
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113 Uint32 Rmask,
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114 Uint32 Gmask,
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115 Uint32 Bmask,
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116 Uint32 Amask);
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117 extern DECLSPEC void SDLCALL SDL_FreeSurface(SDL_Surface * surface);
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118
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119 /**
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120 * \brief Set the palette used by a surface.
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121 *
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122 * \return 0, or -1 if the surface format doesn't use a palette.
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123 *
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124 * \note A single palette can be shared with many surfaces.
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125 */
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126 extern DECLSPEC int SDLCALL SDL_SetSurfacePalette(SDL_Surface * surface,
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127 SDL_Palette * palette);
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128
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129 /**
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130 * \brief Sets up a surface for directly accessing the pixels.
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131 *
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132 * Between calls to SDL_LockSurface()/SDL_UnlockSurface(), you can write
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133 * to and read from 'surface->pixels', using the pixel format stored in
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134 * 'surface->format'. Once you are done accessing the surface, you should
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135 * use SDL_UnlockSurface() to release it.
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136 *
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137 * Not all surfaces require locking. If SDL_MUSTLOCK(surface) evaluates
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138 * to 0, then you can read and write to the surface at any time, and the
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139 * pixel format of the surface will not change.
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140 *
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141 * No operating system or library calls should be made between lock/unlock
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142 * pairs, as critical system locks may be held during this time.
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143 *
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144 * SDL_LockSurface() returns 0, or -1 if the surface couldn't be locked.
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145 *
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146 * \sa SDL_UnlockSurface()
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147 */
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148 extern DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface * surface);
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149 /** \sa SDL_LockSurface() */
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150 extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface * surface);
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151
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152 /**
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153 * Load a surface from a seekable SDL data source (memory or file.)
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154 * If 'freesrc' is non-zero, the source will be closed after being read.
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155 * Returns the new surface, or NULL if there was an error.
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156 * The new surface should be freed with SDL_FreeSurface().
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157 */
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158 extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP_RW(SDL_RWops * src,
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159 int freesrc);
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160
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161 /** Convenience macro -- load a surface from a file */
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162 #define SDL_LoadBMP(file) SDL_LoadBMP_RW(SDL_RWFromFile(file, "rb"), 1)
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163
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164 /**
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165 * Save a surface to a seekable SDL data source (memory or file.)
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166 * If 'freedst' is non-zero, the source will be closed after being written.
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167 * Returns 0 if successful or -1 if there was an error.
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168 */
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169 extern DECLSPEC int SDLCALL SDL_SaveBMP_RW
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170 (SDL_Surface * surface, SDL_RWops * dst, int freedst);
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171
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172 /** Convenience macro -- save a surface to a file */
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173 #define SDL_SaveBMP(surface, file) \
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174 SDL_SaveBMP_RW(surface, SDL_RWFromFile(file, "wb"), 1)
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175
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176 /**
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177 * \brief Sets the RLE acceleration hint for a surface.
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178 *
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179 * \return 0 on success, or -1 if the surface is not valid
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180 *
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181 * \note If RLE is enabled, colorkey and alpha blending blits are much faster,
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182 * but the surface must be locked before directly accessing the pixels.
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183 */
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184 extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface,
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185 int flag);
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186
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187 /**
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188 * \brief Sets the color key (transparent pixel) in a blittable surface.
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189 *
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190 * \param surface The surface to update
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191 * \param flag Non-zero to enable colorkey and 0 to disable colorkey
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192 * \param key The transparent pixel in the native surface format
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193 *
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194 * \return 0 on success, or -1 if the surface is not valid
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195 */
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196 extern DECLSPEC int SDLCALL SDL_SetColorKey(SDL_Surface * surface,
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197 Uint32 flag, Uint32 key);
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198
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199 /**
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200 * \brief Sets the color key (transparent pixel) in a blittable surface.
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201 *
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202 * \param surface The surface to update
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203 * \param key A pointer filled in with the transparent pixel in the native surface format
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204 *
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205 * \return 0 on success, or -1 if the surface is not valid or colorkey is not enabled.
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206 */
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207 extern DECLSPEC int SDLCALL SDL_GetColorKey(SDL_Surface * surface,
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208 Uint32 * key);
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209
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210 /**
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211 * \brief Set an additional color value used in blit operations
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212 *
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213 * \param surface The surface to update
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214 * \param r The red source color value multiplied into blit operations
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215 * \param g The green source color value multiplied into blit operations
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216 * \param b The blue source color value multiplied into blit operations
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217 *
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218 * \return 0 on success, or -1 if the surface is not valid
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219 *
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220 * \sa SDL_GetSurfaceColorMod()
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221 */
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222 extern DECLSPEC int SDLCALL SDL_SetSurfaceColorMod(SDL_Surface * surface,
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223 Uint8 r, Uint8 g, Uint8 b);
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224
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225
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226 /**
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227 * \brief Get the additional color value used in blit operations
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228 *
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229 * \param surface The surface to query
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230 * \param r A pointer filled in with the source red color value
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231 * \param g A pointer filled in with the source green color value
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232 * \param b A pointer filled in with the source blue color value
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233 *
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234 * \return 0 on success, or -1 if the surface is not valid
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235 *
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236 * \sa SDL_SetSurfaceColorMod()
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237 */
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238 extern DECLSPEC int SDLCALL SDL_GetSurfaceColorMod(SDL_Surface * surface,
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239 Uint8 * r, Uint8 * g,
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240 Uint8 * b);
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241
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242 /**
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243 * \brief Set an additional alpha value used in blit operations
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244 *
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245 * \param surface The surface to update
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246 * \param alpha The source alpha value multiplied into blit operations.
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247 *
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248 * \return 0 on success, or -1 if the surface is not valid
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249 *
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250 * \sa SDL_GetSurfaceAlphaMod()
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251 */
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252 extern DECLSPEC int SDLCALL SDL_SetSurfaceAlphaMod(SDL_Surface * surface,
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253 Uint8 alpha);
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254
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255 /**
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256 * \brief Get the additional alpha value used in blit operations
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257 *
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258 * \param surface The surface to query
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259 * \param alpha A pointer filled in with the source alpha value
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260 *
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261 * \return 0 on success, or -1 if the surface is not valid
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262 *
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263 * \sa SDL_SetSurfaceAlphaMod()
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264 */
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265 extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface * surface,
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266 Uint8 * alpha);
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267
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268 /**
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269 * \brief Set the blend mode used for blit operations
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270 *
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271 * \param surface The surface to update
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272 * \param blendMode SDL_TextureBlendMode to use for blit blending
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273 *
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274 * \return 0 on success, or -1 if the parameters are not valid
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275 *
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276 * \sa SDL_GetSurfaceBlendMode()
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277 */
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278 extern DECLSPEC int SDLCALL SDL_SetSurfaceBlendMode(SDL_Surface * surface,
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279 int blendMode);
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280
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281 /**
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282 * \brief Get the blend mode used for blit operations
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283 *
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284 * \param surface The surface to query
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285 * \param blendMode A pointer filled in with the current blend mode
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286 *
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287 * \return 0 on success, or -1 if the surface is not valid
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288 *
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289 * \sa SDL_SetSurfaceBlendMode()
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290 */
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291 extern DECLSPEC int SDLCALL SDL_GetSurfaceBlendMode(SDL_Surface * surface,
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292 int *blendMode);
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293
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294 /**
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295 * \brief Set the scale mode used for blit operations
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296 *
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297 * \param surface The surface to update
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298 * \param scaleMode SDL_TextureScaleMode to use for blit scaling
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299 *
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300 * \return 0 on success, or -1 if the surface is not valid or the scale mode is not supported
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301 *
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302 * \note If the scale mode is not supported, the closest supported mode is chosen. Currently only SDL_TEXTURESCALEMODE_FAST is supported on surfaces.
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303 *
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304 * \sa SDL_GetSurfaceScaleMode()
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305 */
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306 extern DECLSPEC int SDLCALL SDL_SetSurfaceScaleMode(SDL_Surface * surface,
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307 int scaleMode);
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308
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309 /**
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310 * \brief Get the scale mode used for blit operations
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311 *
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312 * \param surface The surface to query
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313 * \param scaleMode A pointer filled in with the current scale mode
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314 *
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315 * \return 0 on success, or -1 if the surface is not valid
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316 *
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317 * \sa SDL_SetSurfaceScaleMode()
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318 */
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319 extern DECLSPEC int SDLCALL SDL_GetSurfaceScaleMode(SDL_Surface * surface,
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320 int *scaleMode);
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321
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322 /**
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323 * Sets the clipping rectangle for the destination surface in a blit.
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324 *
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325 * If the clip rectangle is NULL, clipping will be disabled.
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326 * If the clip rectangle doesn't intersect the surface, the function will
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327 * return SDL_FALSE and blits will be completely clipped. Otherwise the
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328 * function returns SDL_TRUE and blits to the surface will be clipped to
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329 * the intersection of the surface area and the clipping rectangle.
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330 *
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331 * Note that blits are automatically clipped to the edges of the source
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332 * and destination surfaces.
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333 */
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334 extern DECLSPEC SDL_bool SDLCALL SDL_SetClipRect(SDL_Surface * surface,
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335 const SDL_Rect * rect);
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336
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337 /**
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338 * Gets the clipping rectangle for the destination surface in a blit.
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339 * 'rect' must be a pointer to a valid rectangle which will be filled
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340 * with the correct values.
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341 */
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342 extern DECLSPEC void SDLCALL SDL_GetClipRect(SDL_Surface * surface,
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343 SDL_Rect * rect);
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344
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345 /**
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346 * Creates a new surface of the specified format, and then copies and maps
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347 * the given surface to it so the blit of the converted surface will be as
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348 * fast as possible. If this function fails, it returns NULL.
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349 *
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350 * The 'flags' parameter is passed to SDL_CreateRGBSurface() and has those
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351 * semantics. You can also pass SDL_RLEACCEL in the flags parameter and
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352 * SDL will try to RLE accelerate colorkey and alpha blits in the resulting
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353 * surface.
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354 *
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355 * This function is used internally by SDL_DisplayFormat().
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356 */
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357 extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface
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358 (SDL_Surface * src, SDL_PixelFormat * fmt, Uint32 flags);
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359
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360 /**
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361 * This function draws a point with 'color'
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362 * The color should be a pixel of the format used by the surface, and
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363 * can be generated by the SDL_MapRGB() function.
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364 * \return This function returns 0 on success, or -1 on error.
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365 */
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366 extern DECLSPEC int SDLCALL SDL_DrawPoint
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367 (SDL_Surface * dst, int x, int y, Uint32 color);
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368
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369 /**
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370 * This function blends a point with an RGBA value
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371 * The color should be a pixel of the format used by the surface, and
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372 * can be generated by the SDL_MapRGB() function.
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373 * \return This function returns 0 on success, or -1 on error.
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374 */
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375 extern DECLSPEC int SDLCALL SDL_BlendPoint
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376 (SDL_Surface * dst, int x, int y, int blendMode,
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377 Uint8 r, Uint8 g, Uint8 b, Uint8 a);
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378
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379 /**
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380 * This function draws a line with 'color'
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381 * The color should be a pixel of the format used by the surface, and
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382 * can be generated by the SDL_MapRGB() function.
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383 * \return This function returns 0 on success, or -1 on error.
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384 */
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385 extern DECLSPEC int SDLCALL SDL_DrawLine
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386 (SDL_Surface * dst, int x1, int y1, int x2, int y2, Uint32 color);
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387
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388 /**
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389 * This function blends an RGBA value along a line
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390 * \return This function returns 0 on success, or -1 on error.
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391 */
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392 extern DECLSPEC int SDLCALL SDL_BlendLine
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393 (SDL_Surface * dst, int x1, int y1, int x2, int y2, int blendMode,
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394 Uint8 r, Uint8 g, Uint8 b, Uint8 a);
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395
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396 /**
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397 * This function performs a fast fill of the given rectangle with 'color'
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
398 * The given rectangle is clipped to the destination surface clip area
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
399 * and the final fill rectangle is saved in the passed in pointer.
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400 * If 'dstrect' is NULL, the whole surface will be filled with 'color'
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
401 * The color should be a pixel of the format used by the surface, and
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
402 * can be generated by the SDL_MapRGB() function.
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710139a1692d Fixed bug #826
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diff changeset
403 * \return This function returns 0 on success, or -1 on error.
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404 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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405 extern DECLSPEC int SDLCALL SDL_FillRect
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406 (SDL_Surface * dst, SDL_Rect * dstrect, Uint32 color);
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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407
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diff changeset
408 /**
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2859
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409 * This function blends an RGBA value into the given rectangle.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2859
diff changeset
410 * The given rectangle is clipped to the destination surface clip area
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2859
diff changeset
411 * and the final fill rectangle is saved in the passed in pointer.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2859
diff changeset
412 * If 'dstrect' is NULL, the whole surface will be filled with 'color'
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710139a1692d Fixed bug #826
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413 * \return This function returns 0 on success, or -1 on error.
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414 */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2859
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415 extern DECLSPEC int SDLCALL SDL_BlendRect
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2859
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416 (SDL_Surface * dst, SDL_Rect * dstrect, int blendMode, Uint8 r, Uint8 g,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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diff changeset
417 Uint8 b, Uint8 a);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
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parents: 2859
diff changeset
418
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parents: 3103
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419 /**
2275
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420 * This performs a fast blit from the source surface to the destination
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421 * surface. It assumes that the source and destination rectangles are
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diff changeset
422 * the same size. If either 'srcrect' or 'dstrect' are NULL, the entire
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423 * surface (src or dst) is copied. The final blit rectangles are saved
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424 * in 'srcrect' and 'dstrect' after all clipping is performed.
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parents:
diff changeset
425 * If the blit is successful, it returns 0, otherwise it returns -1.
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426 *
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427 * The blit function should not be called on a locked surface.
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428 *
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429 * The blit semantics for surfaces with and without alpha and colorkey
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430 * are defined as follows:
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431 *
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432 * RGBA->RGB:
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433 * SDL_SRCALPHA set:
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434 * alpha-blend (using alpha-channel).
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435 * SDL_SRCCOLORKEY ignored.
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436 * SDL_SRCALPHA not set:
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437 * copy RGB.
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438 * if SDL_SRCCOLORKEY set, only copy the pixels matching the
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
439 * RGB values of the source colour key, ignoring alpha in the
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diff changeset
440 * comparison.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
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441 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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442 * RGB->RGBA:
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443 * SDL_SRCALPHA set:
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444 * alpha-blend (using the source per-surface alpha value);
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diff changeset
445 * set destination alpha to opaque.
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446 * SDL_SRCALPHA not set:
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diff changeset
447 * copy RGB, set destination alpha to source per-surface alpha value.
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diff changeset
448 * both:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
449 * if SDL_SRCCOLORKEY set, only copy the pixels matching the
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
450 * source colour key.
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parents:
diff changeset
451 *
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452 * RGBA->RGBA:
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453 * SDL_SRCALPHA set:
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diff changeset
454 * alpha-blend (using the source alpha channel) the RGB values;
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parents:
diff changeset
455 * leave destination alpha untouched. [Note: is this correct?]
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diff changeset
456 * SDL_SRCCOLORKEY ignored.
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diff changeset
457 * SDL_SRCALPHA not set:
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diff changeset
458 * copy all of RGBA to the destination.
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parents:
diff changeset
459 * if SDL_SRCCOLORKEY set, only copy the pixels matching the
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
460 * RGB values of the source colour key, ignoring alpha in the
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
461 * comparison.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
462 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
463 * RGB->RGB:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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464 * SDL_SRCALPHA set:
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diff changeset
465 * alpha-blend (using the source per-surface alpha value).
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diff changeset
466 * SDL_SRCALPHA not set:
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diff changeset
467 * copy RGB.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
468 * both:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
469 * if SDL_SRCCOLORKEY set, only copy the pixels matching the
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
470 * source colour key.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
471 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
472 * If either of the surfaces were in video memory, and the blit returns -2,
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
473 * the video memory was lost, so it should be reloaded with artwork and
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
474 * re-blitted:
3341
710139a1692d Fixed bug #826
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parents: 3103
diff changeset
475 * @code
710139a1692d Fixed bug #826
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parents: 3103
diff changeset
476 * while ( SDL_BlitSurface(image, imgrect, screen, dstrect) == -2 ) {
710139a1692d Fixed bug #826
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parents: 3103
diff changeset
477 * while ( SDL_LockSurface(image) < 0 )
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
478 * Sleep(10);
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
479 * -- Write image pixels to image->pixels --
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
480 * SDL_UnlockSurface(image);
710139a1692d Fixed bug #826
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parents: 3103
diff changeset
481 * }
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
482 * @endcode
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
483 *
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
484 * This happens under DirectX 5.0 when the system switches away from your
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
485 * fullscreen application. The lock will also fail until you have access
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
486 * to the video memory again.
3341
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
487 *
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
488 * You should call SDL_BlitSurface() unless you know exactly how SDL
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
489 * blitting works internally and how to use the other blit functions.
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
490 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
491 #define SDL_BlitSurface SDL_UpperBlit
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
492
3341
710139a1692d Fixed bug #826
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parents: 3103
diff changeset
493 /** This is the public blit function, SDL_BlitSurface(), and it performs
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
494 * rectangle validation and clipping before passing it to SDL_LowerBlit()
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
495 */
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
496 extern DECLSPEC int SDLCALL SDL_UpperBlit
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
497 (SDL_Surface * src, SDL_Rect * srcrect,
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
498 SDL_Surface * dst, SDL_Rect * dstrect);
3341
710139a1692d Fixed bug #826
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parents: 3103
diff changeset
499
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
500 /** This is a semi-private blit function and it performs low-level surface
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
501 * blitting only.
710139a1692d Fixed bug #826
Sam Lantinga <slouken@libsdl.org>
parents: 3103
diff changeset
502 */
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
503 extern DECLSPEC int SDLCALL SDL_LowerBlit
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
504 (SDL_Surface * src, SDL_Rect * srcrect,
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parents:
diff changeset
505 SDL_Surface * dst, SDL_Rect * dstrect);
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
506
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
507 /**
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
508 * \brief Perform a fast, low quality, stretch blit between two surfaces of the same pixel format.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
509 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
510 * \note This function uses a static buffer, and is not thread-safe.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
511 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
512 extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src,
2828
7e5ff6cd05bf Added very slow software scaling to the X11 renderer
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parents: 2807
diff changeset
513 const SDL_Rect * srcrect,
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
514 SDL_Surface * dst,
2828
7e5ff6cd05bf Added very slow software scaling to the X11 renderer
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parents: 2807
diff changeset
515 const SDL_Rect * dstrect);
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
516
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
517 /* Ends C function definitions when using C++ */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
518 #ifdef __cplusplus
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parents:
diff changeset
519 /* *INDENT-OFF* */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
520 }
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
521 /* *INDENT-ON* */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
522 #endif
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
523 #include "close_code.h"
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
524
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
525 #endif /* _SDL_surface_h */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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diff changeset
526
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
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parents:
diff changeset
527 /* vi: set ts=4 sw=4 expandtab: */