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annotate include/SDL_surface.h @ 3174:c8b9c6d27476

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Fixed some typos and added a couple of includes. All were need to get SDL_power to compile on Linux. Sam, you might want to check to see that the spellings I picked are the spellings you wanted.
author Bob Pendleton <bob@pendleton.com>
date Mon, 08 Jun 2009 19:24:38 +0000
parents 7be21a78777e
children 710139a1692d
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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99210400e8b9 Updated copyright date
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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 /* Used internally (read-only) */
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47 #define SDL_PREALLOC 0x00000001 /* Surface uses preallocated memory */
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48 #define SDL_RLEACCEL 0x00000002 /* Surface is RLE encoded */
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49
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50 /* Evaluates to true if the surface needs to be locked before access */
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51 #define SDL_MUSTLOCK(S) (((S)->flags & SDL_RLEACCEL) != 0)
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52
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53 /**
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54 * \struct SDL_Surface
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55 *
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56 * \brief A collection of pixels used in software blitting
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57 *
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58 * \note This structure should be treated as read-only, except for 'pixels',
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59 * which, if not NULL, contains the raw pixel data for the surface.
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60 */
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61 typedef struct SDL_Surface
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62 {
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63 Uint32 flags; /**< Read-only */
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64 SDL_PixelFormat *format; /**< Read-only */
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65 int w, h; /**< Read-only */
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66 int pitch; /**< Read-only */
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67 void *pixels; /**< Read-write */
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68
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69 /* Application data associated with the surfade */
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70 void *userdata; /**< Read-write */
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71
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72 /* information needed for surfaces requiring locks */
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73 int locked; /**< Read-only */
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74 void *lock_data; /**< Read-only */
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75
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76 /* clipping information */
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77 SDL_Rect clip_rect; /**< Read-only */
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78
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79 /* info for fast blit mapping to other surfaces */
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80 struct SDL_BlitMap *map; /**< Private */
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81
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82 /* format version, bumped at every change to invalidate blit maps */
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83 unsigned int format_version; /**< Private */
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84
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85 /* Reference count -- used when freeing surface */
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86 int refcount; /**< Read-mostly */
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87 } SDL_Surface;
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88
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89 /**
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90 * \typedef SDL_blit
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91 *
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92 * \brief The type of function used for surface blitting functions
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93 */
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94 typedef int (*SDL_blit) (struct SDL_Surface * src, SDL_Rect * srcrect,
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95 struct SDL_Surface * dst, SDL_Rect * dstrect);
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96
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97 /*
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98 * Allocate and free an RGB surface (must be called after SDL_SetVideoMode)
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99 * If the depth is 4 or 8 bits, an empty palette is allocated for the surface.
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100 * If the depth is greater than 8 bits, the pixel format is set using the
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101 * flags '[RGB]mask'.
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102 * If the function runs out of memory, it will return NULL.
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103 *
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104 * The 'flags' are obsolete and should be set to 0.
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105 */
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106 extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurface
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107 (Uint32 flags, int width, int height, int depth,
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108 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
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109 extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceFrom(void *pixels,
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110 int width,
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111 int height,
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112 int depth,
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113 int pitch,
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114 Uint32 Rmask,
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115 Uint32 Gmask,
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116 Uint32 Bmask,
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117 Uint32 Amask);
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118 extern DECLSPEC void SDLCALL SDL_FreeSurface(SDL_Surface * surface);
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119
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120 /**
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121 * \fn int SDL_SetSurfacePalette(SDL_Surface *surface, SDL_Palette *palette)
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122 *
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123 * \brief Set the palette used by a surface.
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124 *
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125 * \return 0, or -1 if the surface format doesn't use a palette.
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126 *
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127 * \note A single palette can be shared with many surfaces.
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128 */
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129 extern DECLSPEC int SDLCALL SDL_SetSurfacePalette(SDL_Surface * surface,
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130 SDL_Palette * palette);
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131
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132 /*
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133 * SDL_LockSurface() sets up a surface for directly accessing the pixels.
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134 * Between calls to SDL_LockSurface()/SDL_UnlockSurface(), you can write
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135 * to and read from 'surface->pixels', using the pixel format stored in
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136 * 'surface->format'. Once you are done accessing the surface, you should
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137 * use SDL_UnlockSurface() to release it.
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138 *
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139 * Not all surfaces require locking. If SDL_MUSTLOCK(surface) evaluates
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140 * to 0, then you can read and write to the surface at any time, and the
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141 * pixel format of the surface will not change.
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142 *
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143 * No operating system or library calls should be made between lock/unlock
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144 * pairs, as critical system locks may be held during this time.
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145 *
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146 * SDL_LockSurface() returns 0, or -1 if the surface couldn't be locked.
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147 */
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148 extern DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface * surface);
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149 extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface * surface);
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150
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151 /*
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152 * Load a surface from a seekable SDL data source (memory or file.)
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153 * If 'freesrc' is non-zero, the source will be closed after being read.
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154 * Returns the new surface, or NULL if there was an error.
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155 * The new surface should be freed with SDL_FreeSurface().
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156 */
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157 extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP_RW(SDL_RWops * src,
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158 int freesrc);
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159
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160 /* Convenience macro -- load a surface from a file */
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161 #define SDL_LoadBMP(file) SDL_LoadBMP_RW(SDL_RWFromFile(file, "rb"), 1)
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162
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163 /*
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164 * Save a surface to a seekable SDL data source (memory or file.)
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165 * If 'freedst' is non-zero, the source will be closed after being written.
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166 * Returns 0 if successful or -1 if there was an error.
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167 */
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168 extern DECLSPEC int SDLCALL SDL_SaveBMP_RW
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169 (SDL_Surface * surface, SDL_RWops * dst, int freedst);
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170
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171 /* Convenience macro -- save a surface to a file */
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172 #define SDL_SaveBMP(surface, file) \
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173 SDL_SaveBMP_RW(surface, SDL_RWFromFile(file, "wb"), 1)
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174
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175 /*
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176 * \fn int SDL_SetSurfaceRLE(SDL_Surface *surface, int flag)
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177 *
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178 * \brief Sets the RLE acceleration hint for a surface.
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179 *
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180 * \return 0 on success, or -1 if the surface is not valid
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181 *
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182 * \note If RLE is enabled, colorkey and alpha blending blits are much faster,
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183 * but the surface must be locked before directly accessing the pixels.
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184 */
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185 extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface,
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186 int flag);
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187
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188 /*
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189 * \fn int SDL_SetColorKey(SDL_Surface *surface, Uint32 flag, Uint32 key)
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190 *
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191 * \brief Sets the color key (transparent pixel) in a blittable surface.
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192 *
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193 * \param surface The surface to update
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194 * \param flag Non-zero to enable colorkey and 0 to disable colorkey
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195 * \param key The transparent pixel in the native surface format
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196 *
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197 * \return 0 on success, or -1 if the surface is not valid
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198 */
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199 extern DECLSPEC int SDLCALL SDL_SetColorKey(SDL_Surface * surface,
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200 Uint32 flag, Uint32 key);
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201
3103
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202 /*
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203 * \fn int SDL_GetColorKey(SDL_Surface *surface, Uint32 *key)
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204 *
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205 * \brief Sets the color key (transparent pixel) in a blittable surface.
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206 *
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207 * \param surface The surface to update
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208 * \param key A pointer filled in with the transparent pixel in the native surface format
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209 *
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210 * \return 0 on success, or -1 if the surface is not valid or colorkey is not enabled.
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211 */
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212 extern DECLSPEC int SDLCALL SDL_GetColorKey(SDL_Surface * surface,
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213 Uint32 * key);
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214
2275
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215 /**
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216 * \fn int SDL_SetSurfaceColorMod(SDL_Surface *surface, Uint8 r, Uint8 g, Uint8 b)
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217 *
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218 * \brief Set an additional color value used in blit operations
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219 *
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220 * \param surface The surface to update
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221 * \param r The red source color value multiplied into blit operations
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222 * \param g The green source color value multiplied into blit operations
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223 * \param b The blue source color value multiplied into blit operations
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224 *
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225 * \return 0 on success, or -1 if the surface is not valid
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226 *
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227 * \sa SDL_GetSurfaceColorMod()
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228 */
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229 extern DECLSPEC int SDLCALL SDL_SetSurfaceColorMod(SDL_Surface * surface,
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230 Uint8 r, Uint8 g, Uint8 b);
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231
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232
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233 /**
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234 * \fn int SDL_GetSurfaceColorMod(SDL_Surface *surface, Uint8 *r, Uint8 *g, Uint8 *b)
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235 *
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236 * \brief Get the additional color value used in blit operations
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237 *
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238 * \param surface The surface to query
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239 * \param r A pointer filled in with the source red color value
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240 * \param g A pointer filled in with the source green color value
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241 * \param b A pointer filled in with the source blue color value
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242 *
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243 * \return 0 on success, or -1 if the surface is not valid
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244 *
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245 * \sa SDL_SetSurfaceColorMod()
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246 */
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247 extern DECLSPEC int SDLCALL SDL_GetSurfaceColorMod(SDL_Surface * surface,
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248 Uint8 * r, Uint8 * g,
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249 Uint8 * b);
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250
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251 /**
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252 * \fn int SDL_SetSurfaceAlphaMod(SDL_Surface *surface, Uint8 alpha)
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253 *
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254 * \brief Set an additional alpha value used in blit operations
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255 *
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256 * \param surface The surface to update
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257 * \param alpha The source alpha value multiplied into blit operations.
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258 *
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259 * \return 0 on success, or -1 if the surface is not valid
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260 *
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261 * \sa SDL_GetSurfaceAlphaMod()
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262 */
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263 extern DECLSPEC int SDLCALL SDL_SetSurfaceAlphaMod(SDL_Surface * surface,
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264 Uint8 alpha);
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265
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266 /**
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267 * \fn int SDL_GetSurfaceAlphaMod(SDL_Surface *surface, Uint8 *alpha)
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268 *
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269 * \brief Get the additional alpha value used in blit operations
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270 *
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271 * \param surface The surface to query
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272 * \param alpha A pointer filled in with the source alpha value
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273 *
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274 * \return 0 on success, or -1 if the surface is not valid
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275 *
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276 * \sa SDL_SetSurfaceAlphaMod()
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277 */
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278 extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface * surface,
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279 Uint8 * alpha);
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280
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281 /**
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282 * \fn int SDL_SetSurfaceBlendMode(SDL_Surface *surface, int blendMode)
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283 *
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284 * \brief Set the blend mode used for blit operations
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285 *
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286 * \param surface The surface to update
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287 * \param blendMode SDL_TextureBlendMode to use for blit blending
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288 *
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289 * \return 0 on success, or -1 if the parameters are not valid
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290 *
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291 * \sa SDL_GetSurfaceBlendMode()
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292 */
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293 extern DECLSPEC int SDLCALL SDL_SetSurfaceBlendMode(SDL_Surface * surface,
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294 int blendMode);
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295
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296 /**
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297 * \fn int SDL_GetSurfaceBlendMode(SDL_Surface *surface, int *blendMode)
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298 *
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299 * \brief Get the blend mode used for blit operations
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300 *
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301 * \param surface The surface to query
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302 * \param blendMode A pointer filled in with the current blend mode
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303 *
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304 * \return 0 on success, or -1 if the surface is not valid
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305 *
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306 * \sa SDL_SetSurfaceBlendMode()
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307 */
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308 extern DECLSPEC int SDLCALL SDL_GetSurfaceBlendMode(SDL_Surface * surface,
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309 int *blendMode);
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310
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311 /**
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312 * \fn int SDL_SetSurfaceScaleMode(SDL_Surface *surface, int scaleMode)
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313 *
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314 * \brief Set the scale mode used for blit operations
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315 *
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316 * \param surface The surface to update
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317 * \param scaleMode SDL_TextureScaleMode to use for blit scaling
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318 *
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319 * \return 0 on success, or -1 if the surface is not valid or the scale mode is not supported
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320 *
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321 * \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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322 *
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323 * \sa SDL_GetSurfaceScaleMode()
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324 */
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325 extern DECLSPEC int SDLCALL SDL_SetSurfaceScaleMode(SDL_Surface * surface,
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326 int scaleMode);
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327
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328 /**
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329 * \fn int SDL_GetSurfaceScaleMode(SDL_Surface *surface, int *scaleMode)
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330 *
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331 * \brief Get the scale mode used for blit operations
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332 *
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333 * \param surface The surface to query
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334 * \param scaleMode A pointer filled in with the current scale mode
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335 *
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336 * \return 0 on success, or -1 if the surface is not valid
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337 *
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338 * \sa SDL_SetSurfaceScaleMode()
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339 */
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340 extern DECLSPEC int SDLCALL SDL_GetSurfaceScaleMode(SDL_Surface * surface,
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341 int *scaleMode);
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342
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343 /*
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344 * Sets the clipping rectangle for the destination surface in a blit.
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345 *
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346 * If the clip rectangle is NULL, clipping will be disabled.
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347 * If the clip rectangle doesn't intersect the surface, the function will
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348 * return SDL_FALSE and blits will be completely clipped. Otherwise the
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349 * function returns SDL_TRUE and blits to the surface will be clipped to
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350 * the intersection of the surface area and the clipping rectangle.
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351 *
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352 * Note that blits are automatically clipped to the edges of the source
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353 * and destination surfaces.
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354 */
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355 extern DECLSPEC SDL_bool SDLCALL SDL_SetClipRect(SDL_Surface * surface,
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356 const SDL_Rect * rect);
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357
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358 /*
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359 * Gets the clipping rectangle for the destination surface in a blit.
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360 * 'rect' must be a pointer to a valid rectangle which will be filled
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361 * with the correct values.
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362 */
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363 extern DECLSPEC void SDLCALL SDL_GetClipRect(SDL_Surface * surface,
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364 SDL_Rect * rect);
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365
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366 /*
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367 * Creates a new surface of the specified format, and then copies and maps
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368 * the given surface to it so the blit of the converted surface will be as
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369 * fast as possible. If this function fails, it returns NULL.
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370 *
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371 * The 'flags' parameter is passed to SDL_CreateRGBSurface() and has those
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372 * semantics. You can also pass SDL_RLEACCEL in the flags parameter and
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373 * SDL will try to RLE accelerate colorkey and alpha blits in the resulting
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374 * surface.
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375 *
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376 * This function is used internally by SDL_DisplayFormat().
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377 */
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378 extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface
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379 (SDL_Surface * src, SDL_PixelFormat * fmt, Uint32 flags);
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380
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381 /*
2901
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382 * This function draws a point with 'color'
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383 * The color should be a pixel of the format used by the surface, and
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384 * can be generated by the SDL_MapRGB() function.
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385 * This function returns 0 on success, or -1 on error.
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386 */
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387 extern DECLSPEC int SDLCALL SDL_DrawPoint
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388 (SDL_Surface * dst, int x, int y, Uint32 color);
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389
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390 /*
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
391 * This function blends a point with an RGBA value
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
392 * The color should be a pixel of the format used by the surface, and
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
393 * can be generated by the SDL_MapRGB() function.
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
394 * This function returns 0 on success, or -1 on error.
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
395 */
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
396 extern DECLSPEC int SDLCALL SDL_BlendPoint
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
397 (SDL_Surface * dst, int x, int y, int blendMode,
133601e3b255 Added RenderPiont() API
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parents: 2888
diff changeset
398 Uint8 r, Uint8 g, Uint8 b, Uint8 a);
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
399
133601e3b255 Added RenderPiont() API
Sam Lantinga <slouken@libsdl.org>
parents: 2888
diff changeset
400 /*
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
401 * This function draws a line with 'color'
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
402 * The color should be a pixel of the format used by the surface, and
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
403 * can be generated by the SDL_MapRGB() function.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
404 * This function returns 0 on success, or -1 on error.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
405 */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
406 extern DECLSPEC int SDLCALL SDL_DrawLine
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
407 (SDL_Surface * dst, int x1, int y1, int x2, int y2, Uint32 color);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
408
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
409 /*
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
410 * This function blends an RGBA value along a line
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
411 * This function returns 0 on success, or -1 on error.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
412 */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
413 extern DECLSPEC int SDLCALL SDL_BlendLine
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
414 (SDL_Surface * dst, int x1, int y1, int x2, int y2, int blendMode,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
415 Uint8 r, Uint8 g, Uint8 b, Uint8 a);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
416
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
417 /*
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
418 * 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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parents:
diff changeset
419 * 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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parents:
diff changeset
420 * and the final fill rectangle is saved in the passed in pointer.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
421 * 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.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
422 * 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.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
423 * can be generated by the SDL_MapRGB() function.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
424 * This function returns 0 on success, or -1 on error.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
425 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
426 extern DECLSPEC int SDLCALL SDL_FillRect
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
427 (SDL_Surface * dst, SDL_Rect * dstrect, Uint32 color);
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
428
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
429 /*
2888
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
430 * This function blends an RGBA value into the given rectangle.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
431 * The given rectangle is clipped to the destination surface clip area
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
432 * and the final fill rectangle is saved in the passed in pointer.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
433 * If 'dstrect' is NULL, the whole surface will be filled with 'color'
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
434 * This function returns 0 on success, or -1 on error.
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
435 */
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
436 extern DECLSPEC int SDLCALL SDL_BlendRect
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
437 (SDL_Surface * dst, SDL_Rect * dstrect, int blendMode, Uint8 r, Uint8 g,
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
438 Uint8 b, Uint8 a);
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
439
32e8bbba1e94 Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents: 2859
diff changeset
440 /*
2275
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
441 * This performs a fast blit from the source surface to the destination
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
442 * surface. It assumes that the source and destination rectangles are
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
443 * the same size. If either 'srcrect' or 'dstrect' are NULL, the entire
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
444 * surface (src or dst) is copied. The final blit rectangles are saved
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
445 * in 'srcrect' and 'dstrect' after all clipping is performed.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
446 * If the blit is successful, it returns 0, otherwise it returns -1.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
447 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
448 * The blit function should not be called on a locked surface.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
449 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
450 * The blit semantics for surfaces with and without alpha and colorkey
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
451 * are defined as follows:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
452 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
453 * RGBA->RGB:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
454 * SDL_SRCALPHA set:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
455 * alpha-blend (using alpha-channel).
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
456 * SDL_SRCCOLORKEY ignored.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
457 * SDL_SRCALPHA not set:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
458 * copy RGB.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
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.
Sam Lantinga <slouken@libsdl.org>
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.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
461 * comparison.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
462 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
463 * RGB->RGBA:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
464 * SDL_SRCALPHA set:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
465 * alpha-blend (using the source per-surface alpha value);
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
466 * set destination alpha to opaque.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
467 * SDL_SRCALPHA not set:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
468 * copy RGB, set destination alpha to source per-surface alpha value.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
469 * both:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
470 * 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
471 * source colour key.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
472 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
473 * RGBA->RGBA:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
474 * SDL_SRCALPHA set:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
475 * alpha-blend (using the source alpha channel) the RGB values;
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
476 * leave destination alpha untouched. [Note: is this correct?]
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
477 * SDL_SRCCOLORKEY ignored.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
478 * SDL_SRCALPHA not set:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
479 * copy all of RGBA to the destination.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
480 * 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
481 * 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.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
482 * comparison.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
483 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
484 * RGB->RGB:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
485 * SDL_SRCALPHA set:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
486 * alpha-blend (using the source per-surface alpha value).
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
487 * SDL_SRCALPHA not set:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
488 * copy RGB.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
489 * both:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
490 * 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
491 * source colour key.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
492 *
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
493 * 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.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
494 * 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.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
495 * re-blitted:
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
496 while ( SDL_BlitSurface(image, imgrect, screen, dstrect) == -2 ) {
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
497 while ( SDL_LockSurface(image) < 0 )
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
498 Sleep(10);
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
499 -- Write image pixels to image->pixels --
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
500 SDL_UnlockSurface(image);
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
501 }
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
502 * 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
503 * 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
504 * to the video memory again.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
505 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
506 /* You should call SDL_BlitSurface() unless you know exactly how SDL
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
507 blitting works internally and how to use the other blit functions.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
508 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
509 #define SDL_BlitSurface SDL_UpperBlit
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
510
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
511 /* This is the public blit function, SDL_BlitSurface(), and it performs
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
512 rectangle validation and clipping before passing it to SDL_LowerBlit()
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
513 */
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
514 extern DECLSPEC int SDLCALL SDL_UpperBlit
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
515 (SDL_Surface * src, SDL_Rect * srcrect,
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
516 SDL_Surface * dst, SDL_Rect * dstrect);
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
517 /* This is a semi-private blit function and it performs low-level surface
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
518 blitting only.
12ea0fdc0df2 Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
519 */
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520 extern DECLSPEC int SDLCALL SDL_LowerBlit
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521 (SDL_Surface * src, SDL_Rect * srcrect,
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522 SDL_Surface * dst, SDL_Rect * dstrect);
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523
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524 /**
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525 * \fn int SDL_SoftStretch(SDL_Surface * src, const SDL_Rect * srcrect, SDL_Surface * dst, const SDL_Rect * dstrect)
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526 *
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527 * \brief Perform a fast, low quality, stretch blit between two surfaces of the same pixel format.
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528 *
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529 * \note This function uses a static buffer, and is not thread-safe.
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530 */
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531 extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src,
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532 const SDL_Rect * srcrect,
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533 SDL_Surface * dst,
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534 const SDL_Rect * dstrect);
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535
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536 /* Ends C function definitions when using C++ */
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537 #ifdef __cplusplus
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538 /* *INDENT-OFF* */
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539 }
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540 /* *INDENT-ON* */
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541 #endif
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542 #include "close_code.h"
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543
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544 #endif /* _SDL_surface_h */
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545
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546 /* vi: set ts=4 sw=4 expandtab: */