Mercurial > sdl-ios-xcode
annotate include/SDL_surface.h @ 4920:a4032241deb5
Fixed massive stack memory usage in the gesture functions
author | Sam Lantinga <slouken@libsdl.org> |
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date | Tue, 30 Nov 2010 18:07:31 -0800 |
parents | 274743af0430 |
children | aa8888658021 |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
3697 | 3 Copyright (C) 1997-2010 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 |
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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 /** |
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46 * \name Surface flags |
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47 * |
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48 * These are the currently supported flags for the ::SDL_surface. |
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49 * |
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50 * \internal |
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51 * Used internally (read-only). |
3341 | 52 */ |
53 /*@{*/ | |
54 #define SDL_PREALLOC 0x00000001 /**< Surface uses preallocated memory */ | |
55 #define SDL_RLEACCEL 0x00000002 /**< Surface is RLE encoded */ | |
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56 /*@}*//*Surface flags*/ |
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57 |
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58 /** |
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59 * Evaluates to true if the surface needs to be locked before access. |
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60 */ |
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61 #define SDL_MUSTLOCK(S) (((S)->flags & SDL_RLEACCEL) != 0) |
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62 |
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63 /** |
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64 * \brief A collection of pixels used in software blitting. |
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65 * |
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66 * \note This structure should be treated as read-only, except for \c pixels, |
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67 * which, if not NULL, contains the raw pixel data for the surface. |
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68 */ |
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69 typedef struct SDL_Surface |
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70 { |
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71 Uint32 flags; /**< Read-only */ |
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72 SDL_PixelFormat *format; /**< Read-only */ |
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73 int w, h; /**< Read-only */ |
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74 int pitch; /**< Read-only */ |
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75 void *pixels; /**< Read-write */ |
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76 |
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77 /** Application data associated with the surface */ |
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78 void *userdata; /**< Read-write */ |
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79 |
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80 /** information needed for surfaces requiring locks */ |
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81 int locked; /**< Read-only */ |
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82 void *lock_data; /**< Read-only */ |
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83 |
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84 /** clipping information */ |
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85 SDL_Rect clip_rect; /**< Read-only */ |
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86 |
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87 /** info for fast blit mapping to other surfaces */ |
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88 struct SDL_BlitMap *map; /**< Private */ |
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89 |
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90 /** format version, bumped at every change to invalidate blit maps */ |
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91 unsigned int format_version; /**< Private */ |
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92 |
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93 /** Reference count -- used when freeing surface */ |
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94 int refcount; /**< Read-mostly */ |
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95 } SDL_Surface; |
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96 |
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97 /** |
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98 * \brief The type of function used for surface blitting functions. |
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99 */ |
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100 typedef int (*SDL_blit) (struct SDL_Surface * src, SDL_Rect * srcrect, |
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101 struct SDL_Surface * dst, SDL_Rect * dstrect); |
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102 |
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104 * Allocate and free an RGB surface. |
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105 * |
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106 * If the depth is 4 or 8 bits, an empty palette is allocated for the surface. |
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107 * If the depth is greater than 8 bits, the pixel format is set using the |
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108 * flags '[RGB]mask'. |
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109 * |
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110 * If the function runs out of memory, it will return NULL. |
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111 * |
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112 * \param flags The \c flags are obsolete and should be set to 0. |
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113 */ |
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114 extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurface |
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115 (Uint32 flags, int width, int height, int depth, |
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116 Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask); |
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117 extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceFrom(void *pixels, |
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118 int width, |
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119 int height, |
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120 int depth, |
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121 int pitch, |
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122 Uint32 Rmask, |
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123 Uint32 Gmask, |
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124 Uint32 Bmask, |
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125 Uint32 Amask); |
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126 extern DECLSPEC void SDLCALL SDL_FreeSurface(SDL_Surface * surface); |
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127 |
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128 /** |
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129 * \brief Set the palette used by a surface. |
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130 * |
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131 * \return 0, or -1 if the surface format doesn't use a palette. |
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132 * |
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133 * \note A single palette can be shared with many surfaces. |
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134 */ |
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135 extern DECLSPEC int SDLCALL SDL_SetSurfacePalette(SDL_Surface * surface, |
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136 SDL_Palette * palette); |
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137 |
3341 | 138 /** |
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139 * \brief Sets up a surface for directly accessing the pixels. |
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140 * |
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141 * Between calls to SDL_LockSurface() / SDL_UnlockSurface(), you can write |
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142 * to and read from \c surface->pixels, using the pixel format stored in |
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143 * \c surface->format. Once you are done accessing the surface, you should |
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144 * use SDL_UnlockSurface() to release it. |
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145 * |
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146 * Not all surfaces require locking. If SDL_MUSTLOCK(surface) evaluates |
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147 * to 0, then you can read and write to the surface at any time, and the |
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148 * pixel format of the surface will not change. |
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149 * |
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150 * No operating system or library calls should be made between lock/unlock |
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151 * pairs, as critical system locks may be held during this time. |
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152 * |
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153 * SDL_LockSurface() returns 0, or -1 if the surface couldn't be locked. |
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154 * |
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155 * \sa SDL_UnlockSurface() |
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156 */ |
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157 extern DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface * surface); |
3341 | 158 /** \sa SDL_LockSurface() */ |
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159 extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface * surface); |
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160 |
3341 | 161 /** |
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162 * Load a surface from a seekable SDL data source (memory or file). |
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163 * |
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164 * If \c freesrc is non-zero, the source will be closed after being read. |
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165 * |
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166 * The new surface should be freed with SDL_FreeSurface(). |
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167 * |
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168 * \return the new surface, or NULL if there was an error. |
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169 */ |
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170 extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP_RW(SDL_RWops * src, |
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171 int freesrc); |
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172 |
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173 /** |
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174 * Load a surface from a file. |
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175 * |
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176 * Convenience macro. |
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177 */ |
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178 #define SDL_LoadBMP(file) SDL_LoadBMP_RW(SDL_RWFromFile(file, "rb"), 1) |
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179 |
3341 | 180 /** |
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181 * Save a surface to a seekable SDL data source (memory or file). |
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182 * |
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183 * If \c freedst is non-zero, the source will be closed after being written. |
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184 * |
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185 * \return 0 if successful or -1 if there was an error. |
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186 */ |
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187 extern DECLSPEC int SDLCALL SDL_SaveBMP_RW |
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188 (SDL_Surface * surface, SDL_RWops * dst, int freedst); |
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189 |
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190 /** |
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191 * Save a surface to a file. |
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192 * |
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193 * Convenience macro. |
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194 */ |
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195 #define SDL_SaveBMP(surface, file) \ |
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196 SDL_SaveBMP_RW(surface, SDL_RWFromFile(file, "wb"), 1) |
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197 |
3341 | 198 /** |
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199 * \brief Sets the RLE acceleration hint for a surface. |
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200 * |
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201 * \return 0 on success, or -1 if the surface is not valid |
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202 * |
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203 * \note If RLE is enabled, colorkey and alpha blending blits are much faster, |
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204 * but the surface must be locked before directly accessing the pixels. |
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205 */ |
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206 extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface, |
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207 int flag); |
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208 |
3341 | 209 /** |
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210 * \brief Sets the color key (transparent pixel) in a blittable surface. |
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211 * |
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212 * \param surface The surface to update |
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213 * \param flag Non-zero to enable colorkey and 0 to disable colorkey |
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214 * \param key The transparent pixel in the native surface format |
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215 * |
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216 * \return 0 on success, or -1 if the surface is not valid |
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217 */ |
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218 extern DECLSPEC int SDLCALL SDL_SetColorKey(SDL_Surface * surface, |
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219 int flag, Uint32 key); |
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220 |
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3550 | 222 * \brief Gets the color key (transparent pixel) in a blittable surface. |
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223 * |
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224 * \param surface The surface to update |
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225 * \param key A pointer filled in with the transparent pixel in the native |
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226 * surface format |
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227 * |
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228 * \return 0 on success, or -1 if the surface is not valid or colorkey is not |
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229 * enabled. |
3103 | 230 */ |
231 extern DECLSPEC int SDLCALL SDL_GetColorKey(SDL_Surface * surface, | |
232 Uint32 * key); | |
233 | |
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234 /** |
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235 * \brief Set an additional color value used in blit operations. |
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236 * |
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237 * \param surface The surface to update. |
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238 * \param r The red source color value multiplied into blit operations. |
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239 * \param g The green source color value multiplied into blit operations. |
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240 * \param b The blue source color value multiplied into blit operations. |
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241 * |
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242 * \return 0 on success, or -1 if the surface is not valid. |
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243 * |
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244 * \sa SDL_GetSurfaceColorMod() |
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245 */ |
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246 extern DECLSPEC int SDLCALL SDL_SetSurfaceColorMod(SDL_Surface * surface, |
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247 Uint8 r, Uint8 g, Uint8 b); |
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248 |
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249 |
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250 /** |
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251 * \brief Get the additional color value used in blit operations. |
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252 * |
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253 * \param surface The surface to query. |
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254 * \param r A pointer filled in with the source red color value. |
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255 * \param g A pointer filled in with the source green color value. |
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256 * \param b A pointer filled in with the source blue color value. |
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257 * |
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258 * \return 0 on success, or -1 if the surface is not valid. |
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259 * |
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260 * \sa SDL_SetSurfaceColorMod() |
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261 */ |
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262 extern DECLSPEC int SDLCALL SDL_GetSurfaceColorMod(SDL_Surface * surface, |
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263 Uint8 * r, Uint8 * g, |
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264 Uint8 * b); |
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265 |
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266 /** |
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267 * \brief Set an additional alpha value used in blit operations. |
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268 * |
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269 * \param surface The surface to update. |
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270 * \param alpha The source alpha value multiplied into blit operations. |
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271 * |
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272 * \return 0 on success, or -1 if the surface is not valid. |
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273 * |
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274 * \sa SDL_GetSurfaceAlphaMod() |
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275 */ |
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276 extern DECLSPEC int SDLCALL SDL_SetSurfaceAlphaMod(SDL_Surface * surface, |
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277 Uint8 alpha); |
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278 |
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279 /** |
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280 * \brief Get the additional alpha value used in blit operations. |
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281 * |
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282 * \param surface The surface to query. |
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283 * \param alpha A pointer filled in with the source alpha value. |
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284 * |
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285 * \return 0 on success, or -1 if the surface is not valid. |
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286 * |
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287 * \sa SDL_SetSurfaceAlphaMod() |
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288 */ |
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289 extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface * surface, |
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290 Uint8 * alpha); |
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291 |
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292 /** |
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293 * \brief Set the blend mode used for blit operations. |
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294 * |
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295 * \param surface The surface to update. |
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296 * \param blendMode ::SDL_BlendMode to use for blit blending. |
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297 * |
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298 * \return 0 on success, or -1 if the parameters are not valid. |
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299 * |
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300 * \sa SDL_GetSurfaceBlendMode() |
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301 */ |
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302 extern DECLSPEC int SDLCALL SDL_SetSurfaceBlendMode(SDL_Surface * surface, |
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303 int blendMode); |
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304 |
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305 /** |
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306 * \brief Get the blend mode used for blit operations. |
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307 * |
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308 * \param surface The surface to query. |
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309 * \param blendMode A pointer filled in with the current blend mode. |
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310 * |
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311 * \return 0 on success, or -1 if the surface is not valid. |
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312 * |
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313 * \sa SDL_SetSurfaceBlendMode() |
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314 */ |
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315 extern DECLSPEC int SDLCALL SDL_GetSurfaceBlendMode(SDL_Surface * surface, |
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316 int *blendMode); |
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317 |
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318 /** |
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319 * \brief Set the scale mode used for blit operations. |
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320 * |
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321 * \param surface The surface to update. |
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322 * \param scaleMode ::SDL_TextureScaleMode to use for blit scaling. |
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323 * |
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324 * \return 0 on success, or -1 if the surface is not valid or the scale mode is |
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325 * not supported. |
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326 * |
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327 * \note If the scale mode is not supported, the closest supported mode is |
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328 * chosen. Currently only ::SDL_TEXTURESCALEMODE_FAST is supported on |
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329 * surfaces. |
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330 * |
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331 * \sa SDL_GetSurfaceScaleMode() |
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332 */ |
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333 extern DECLSPEC int SDLCALL SDL_SetSurfaceScaleMode(SDL_Surface * surface, |
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334 int scaleMode); |
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335 |
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336 /** |
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337 * \brief Get the scale mode used for blit operations. |
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338 * |
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339 * \param surface The surface to query. |
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340 * \param scaleMode A pointer filled in with the current scale mode. |
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341 * |
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342 * \return 0 on success, or -1 if the surface is not valid. |
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343 * |
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344 * \sa SDL_SetSurfaceScaleMode() |
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345 */ |
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346 extern DECLSPEC int SDLCALL SDL_GetSurfaceScaleMode(SDL_Surface * surface, |
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347 int *scaleMode); |
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348 |
3341 | 349 /** |
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350 * Sets the clipping rectangle for the destination surface in a blit. |
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351 * |
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352 * If the clip rectangle is NULL, clipping will be disabled. |
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353 * |
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354 * If the clip rectangle doesn't intersect the surface, the function will |
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355 * return SDL_FALSE and blits will be completely clipped. Otherwise the |
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356 * function returns SDL_TRUE and blits to the surface will be clipped to |
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357 * the intersection of the surface area and the clipping rectangle. |
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358 * |
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359 * Note that blits are automatically clipped to the edges of the source |
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360 * and destination surfaces. |
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361 */ |
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362 extern DECLSPEC SDL_bool SDLCALL SDL_SetClipRect(SDL_Surface * surface, |
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363 const SDL_Rect * rect); |
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364 |
3341 | 365 /** |
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366 * Gets the clipping rectangle for the destination surface in a blit. |
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367 * |
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368 * \c rect must be a pointer to a valid rectangle which will be filled |
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369 * with the correct values. |
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370 */ |
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371 extern DECLSPEC void SDLCALL SDL_GetClipRect(SDL_Surface * surface, |
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372 SDL_Rect * rect); |
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373 |
3341 | 374 /** |
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375 * Creates a new surface of the specified format, and then copies and maps |
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376 * the given surface to it so the blit of the converted surface will be as |
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377 * fast as possible. If this function fails, it returns NULL. |
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378 * |
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379 * The \c flags parameter is passed to SDL_CreateRGBSurface() and has those |
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380 * semantics. You can also pass ::SDL_RLEACCEL in the flags parameter and |
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381 * SDL will try to RLE accelerate colorkey and alpha blits in the resulting |
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382 * surface. |
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383 */ |
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384 extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface |
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385 (SDL_Surface * src, SDL_PixelFormat * fmt, Uint32 flags); |
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386 |
3341 | 387 /** |
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388 * \brief Copy a block of pixels of one format to another format |
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389 */ |
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390 extern DECLSPEC int SDLCALL SDL_ConvertPixels(int width, int height, |
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391 Uint32 src_format, |
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392 const void * src, int src_pitch, |
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393 Uint32 dst_format, |
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394 void * dst, int dst_pitch); |
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395 |
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396 /** |
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397 * Draws a point with \c color. |
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398 * |
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399 * The color should be a pixel of the format used by the surface, and |
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400 * can be generated by the SDL_MapRGB() function. |
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401 * |
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402 * \return 0 on success, or -1 on error. |
2901 | 403 */ |
404 extern DECLSPEC int SDLCALL SDL_DrawPoint | |
405 (SDL_Surface * dst, int x, int y, Uint32 color); | |
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406 extern DECLSPEC int SDLCALL SDL_DrawPoints |
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407 (SDL_Surface * dst, const SDL_Point * points, int count, Uint32 color); |
2901 | 408 |
3341 | 409 /** |
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410 * Blends a point with an RGBA value. |
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411 * |
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412 * \return 0 on success, or -1 on error. |
2901 | 413 */ |
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414 extern DECLSPEC int SDLCALL SDL_BlendPoint |
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415 (SDL_Surface * dst, int x, int y, |
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416 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
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417 extern DECLSPEC int SDLCALL SDL_BlendPoints |
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418 (SDL_Surface * dst, const SDL_Point * points, int count, |
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419 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
2901 | 420 |
3341 | 421 /** |
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422 * Draws a line with \c color. |
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423 * |
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424 * The color should be a pixel of the format used by the surface, and |
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425 * can be generated by the SDL_MapRGB() function. |
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426 * |
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427 * \return 0 on success, or -1 on error. |
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428 */ |
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429 extern DECLSPEC int SDLCALL SDL_DrawLine |
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430 (SDL_Surface * dst, int x1, int y1, int x2, int y2, Uint32 color); |
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431 extern DECLSPEC int SDLCALL SDL_DrawLines |
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432 (SDL_Surface * dst, const SDL_Point * points, int count, Uint32 color); |
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433 |
3341 | 434 /** |
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435 * Blends an RGBA value along a line. |
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436 * |
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437 * \return 0 on success, or -1 on error. |
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438 */ |
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439 extern DECLSPEC int SDLCALL SDL_BlendLine |
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440 (SDL_Surface * dst, int x1, int y1, int x2, int y2, |
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441 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
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442 extern DECLSPEC int SDLCALL SDL_BlendLines |
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443 (SDL_Surface * dst, const SDL_Point * points, int count, |
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444 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
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445 |
3341 | 446 /** |
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447 * Draws the given rectangle with \c color. |
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448 * |
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449 * If \c rect is NULL, the whole surface will be outlined with \c color. |
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450 * |
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451 * The color should be a pixel of the format used by the surface, and |
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452 * can be generated by the SDL_MapRGB() function. |
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453 * |
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454 * \return 0 on success, or -1 on error. |
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455 */ |
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456 extern DECLSPEC int SDLCALL SDL_DrawRect |
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457 (SDL_Surface * dst, const SDL_Rect * rect, Uint32 color); |
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458 extern DECLSPEC int SDLCALL SDL_DrawRects |
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459 (SDL_Surface * dst, const SDL_Rect ** rects, int count, Uint32 color); |
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460 |
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461 /** |
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462 * Blends an RGBA value into the outline of the given rectangle. |
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463 * |
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464 * If \c rect is NULL, the whole surface will have a blended outline. |
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465 * |
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466 * \return 0 on success, or -1 on error. |
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467 */ |
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468 extern DECLSPEC int SDLCALL SDL_BlendRect |
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469 (SDL_Surface * dst, const SDL_Rect * rect, |
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470 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
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471 extern DECLSPEC int SDLCALL SDL_BlendRects |
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472 (SDL_Surface * dst, const SDL_Rect ** rects, int count, |
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473 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
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474 |
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475 /** |
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476 * Performs a fast fill of the given rectangle with \c color. |
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477 * |
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478 * If \c rect is NULL, the whole surface will be filled with \c color. |
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479 * |
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480 * The color should be a pixel of the format used by the surface, and |
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481 * can be generated by the SDL_MapRGB() function. |
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482 * |
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483 * \return 0 on success, or -1 on error. |
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484 */ |
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485 extern DECLSPEC int SDLCALL SDL_FillRect |
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486 (SDL_Surface * dst, const SDL_Rect * rect, Uint32 color); |
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487 extern DECLSPEC int SDLCALL SDL_FillRects |
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488 (SDL_Surface * dst, const SDL_Rect ** rects, int count, Uint32 color); |
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489 |
3341 | 490 /** |
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491 * Blends an RGBA value into the given rectangle. |
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492 * |
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493 * If \c rect is NULL, the whole surface will be blended with the color. |
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494 * |
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495 * \return This function returns 0 on success, or -1 on error. |
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496 */ |
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497 extern DECLSPEC int SDLCALL SDL_BlendFillRect |
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498 (SDL_Surface * dst, const SDL_Rect * rect, |
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499 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
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3560
diff
changeset
|
500 extern DECLSPEC int SDLCALL SDL_BlendFillRects |
3536
0267b8b1595c
Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents:
3434
diff
changeset
|
501 (SDL_Surface * dst, const SDL_Rect ** rects, int count, |
0267b8b1595c
Added interfaces for batch drawing of points, lines and rects:
Sam Lantinga <slouken@libsdl.org>
parents:
3434
diff
changeset
|
502 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
2888
32e8bbba1e94
Added stubs for software implementations of blending fills and line drawing
Sam Lantinga <slouken@libsdl.org>
parents:
2859
diff
changeset
|
503 |
3596
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
504 #if 0 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
505 /** |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
506 * Draws the given circle with \c color. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
507 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
508 * The color should be a pixel of the format used by the surface, and |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
509 * can be generated by the SDL_MapRGB() function. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
510 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
511 * \return 0 on success, or -1 on error. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
512 */ |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
513 extern DECLSPEC int SDLCALL SDL_DrawCircle |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
514 (SDL_Surface * dst, int x, int y, int radius, Uint32 color); |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
515 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
516 /** |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
517 * Blends an RGBA value into the outline of the given circle. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
518 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
519 * \return 0 on success, or -1 on error. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
520 */ |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
521 extern DECLSPEC int SDLCALL SDL_BlendCircle |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
522 (SDL_Surface * dst, int x, int y, int radius, |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
523 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
524 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
525 /** |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
526 * Fills the given circle with \c color. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
527 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
528 * The color should be a pixel of the format used by the surface, and |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
529 * can be generated by the SDL_MapRGB() function. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
530 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
531 * \return 0 on success, or -1 on error. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
532 */ |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
533 extern DECLSPEC int SDLCALL SDL_FillCircle |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
534 (SDL_Surface * dst, int x, int y, int radius, Uint32 color); |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
535 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
536 /** |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
537 * Blends an RGBA value into the given circle. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
538 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
539 * \return This function returns 0 on success, or -1 on error. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
540 */ |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
541 extern DECLSPEC int SDLCALL SDL_BlendFillCircle |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
542 (SDL_Surface * dst, int x, int y, int radius, |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
543 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
544 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
545 /** |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
546 * Draws the given ellipse with \c color. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
547 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
548 * The color should be a pixel of the format used by the surface, and |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
549 * can be generated by the SDL_MapRGB() function. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
550 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
551 * \return 0 on success, or -1 on error. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
552 */ |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
553 extern DECLSPEC int SDLCALL SDL_DrawEllipse |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
554 (SDL_Surface * dst, int x, int y, int w, int h, Uint32 color); |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
555 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
556 /** |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
557 * Blends an RGBA value into the outline of the given ellipse. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
558 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
559 * \return 0 on success, or -1 on error. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
560 */ |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
561 extern DECLSPEC int SDLCALL SDL_BlendEllipse |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
562 (SDL_Surface * dst, int x, int y, int w, int h, |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
563 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
564 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
565 /** |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
566 * Fills the given ellipse with \c color. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
567 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
568 * The color should be a pixel of the format used by the surface, and |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
569 * can be generated by the SDL_MapRGB() function. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
570 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
571 * \return 0 on success, or -1 on error. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
572 */ |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
573 extern DECLSPEC int SDLCALL SDL_FillEllipse |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
574 (SDL_Surface * dst, int x, int y, int w, int h, Uint32 color); |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
575 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
576 /** |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
577 * Blends an RGBA value into the given ellipse. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
578 * |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
579 * \return This function returns 0 on success, or -1 on error. |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
580 */ |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
581 extern DECLSPEC int SDLCALL SDL_BlendFillEllipse |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
582 (SDL_Surface * dst, int x, int y, int w, int h, |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
583 int blendMode, Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
584 #endif // 0 |
f638ded38b8a
Added SDL_RenderClear() as a fast method of clearing the screen to the drawing color.
Sam Lantinga <slouken@libsdl.org>
parents:
3593
diff
changeset
|
585 |
3341 | 586 /** |
3407
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
587 * Performs a fast blit from the source surface to the destination surface. |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
588 * |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
589 * This assumes that the source and destination rectangles are |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
590 * the same size. If either \c srcrect or \c dstrect are NULL, the entire |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
591 * surface (\c src or \c dst) is copied. The final blit rectangles are saved |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
592 * in \c srcrect and \c dstrect after all clipping is performed. |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
593 * |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
594 * \return If the blit is successful, it returns 0, otherwise it returns -1. |
2275
12ea0fdc0df2
Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
595 * |
3407
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
596 * The blit function should not be called on a locked surface. |
2275
12ea0fdc0df2
Split out the SDL_rect and SDL_surface functions into their own headers.
Sam Lantinga <slouken@libsdl.org>
parents:
diff
changeset
|
597 * |
3407
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
598 * The blit semantics for surfaces with and without alpha and colorkey |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
599 * are defined as follows: |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
600 * \verbatim |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
601 RGBA->RGB: |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
602 SDL_SRCALPHA set: |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
603 alpha-blend (using alpha-channel). |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
604 SDL_SRCCOLORKEY ignored. |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
605 SDL_SRCALPHA not set: |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
606 copy RGB. |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
607 if SDL_SRCCOLORKEY set, only copy the pixels matching the |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
608 RGB values of the source colour key, ignoring alpha in the |
d3baf5ac4e37
Partial fix for bug #859
Sam Lantinga <slouken@libsdl.org>
parents:
3341
diff
changeset
|
609 comparison. |
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610 |
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611 RGB->RGBA: |
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612 SDL_SRCALPHA set: |
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613 alpha-blend (using the source per-surface alpha value); |
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614 set destination alpha to opaque. |
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615 SDL_SRCALPHA not set: |
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616 copy RGB, set destination alpha to source per-surface alpha value. |
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617 both: |
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618 if SDL_SRCCOLORKEY set, only copy the pixels matching the |
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619 source colour key. |
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620 |
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621 RGBA->RGBA: |
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622 SDL_SRCALPHA set: |
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623 alpha-blend (using the source alpha channel) the RGB values; |
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624 leave destination alpha untouched. [Note: is this correct?] |
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625 SDL_SRCCOLORKEY ignored. |
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626 SDL_SRCALPHA not set: |
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627 copy all of RGBA to the destination. |
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628 if SDL_SRCCOLORKEY set, only copy the pixels matching the |
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629 RGB values of the source colour key, ignoring alpha in the |
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630 comparison. |
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631 |
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632 RGB->RGB: |
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633 SDL_SRCALPHA set: |
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634 alpha-blend (using the source per-surface alpha value). |
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635 SDL_SRCALPHA not set: |
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636 copy RGB. |
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637 both: |
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638 if SDL_SRCCOLORKEY set, only copy the pixels matching the |
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639 source colour key. |
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640 \endverbatim |
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641 * |
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642 * If either of the surfaces were in video memory, and the blit returns -2, |
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643 * the video memory was lost, so it should be reloaded with artwork and |
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644 * re-blitted: |
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645 * @code |
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646 * while ( SDL_BlitSurface(image, imgrect, screen, dstrect) == -2 ) { |
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647 * while ( SDL_LockSurface(image) < 0 ) |
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648 * Sleep(10); |
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649 * -- Write image pixels to image->pixels -- |
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650 * SDL_UnlockSurface(image); |
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651 * } |
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652 * @endcode |
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653 * |
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654 * This happens under DirectX 5.0 when the system switches away from your |
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655 * fullscreen application. The lock will also fail until you have access |
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656 * to the video memory again. |
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657 * |
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658 * You should call SDL_BlitSurface() unless you know exactly how SDL |
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659 * blitting works internally and how to use the other blit functions. |
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660 */ |
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661 #define SDL_BlitSurface SDL_UpperBlit |
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662 |
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663 /** |
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664 * This is the public blit function, SDL_BlitSurface(), and it performs |
3341 | 665 * rectangle validation and clipping before passing it to SDL_LowerBlit() |
666 */ | |
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667 extern DECLSPEC int SDLCALL SDL_UpperBlit |
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668 (SDL_Surface * src, SDL_Rect * srcrect, |
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669 SDL_Surface * dst, SDL_Rect * dstrect); |
3341 | 670 |
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671 /** |
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672 * This is a semi-private blit function and it performs low-level surface |
3341 | 673 * blitting only. |
674 */ | |
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675 extern DECLSPEC int SDLCALL SDL_LowerBlit |
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676 (SDL_Surface * src, SDL_Rect * srcrect, |
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677 SDL_Surface * dst, SDL_Rect * dstrect); |
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678 |
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679 /** |
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680 * \brief Perform a fast, low quality, stretch blit between two surfaces of the |
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681 * same pixel format. |
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682 * |
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683 * \note This function uses a static buffer, and is not thread-safe. |
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684 */ |
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685 extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src, |
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686 const SDL_Rect * srcrect, |
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687 SDL_Surface * dst, |
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688 const SDL_Rect * dstrect); |
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689 |
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690 /* Ends C function definitions when using C++ */ |
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691 #ifdef __cplusplus |
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692 /* *INDENT-OFF* */ |
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693 } |
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694 /* *INDENT-ON* */ |
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695 #endif |
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696 #include "close_code.h" |
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697 |
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698 #endif /* _SDL_surface_h */ |
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699 |
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700 /* vi: set ts=4 sw=4 expandtab: */ |