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5496 | leency | 1 | /* |
2 | SDL - Simple DirectMedia Layer |
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3 | Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga |
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4 | |||
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 Library General Public |
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7 | License as published by the Free Software Foundation; either |
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8 | version 2 of the License, or (at your option) any later version. |
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9 | |||
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 | Library General Public License for more details. |
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14 | |||
15 | You should have received a copy of the GNU Library General Public |
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16 | License along with this library; if not, write to the Free |
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17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 | |||
19 | Sam Lantinga |
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20 | slouken@devolution.com |
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21 | */ |
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22 | |||
23 | #ifdef SAVE_RCSID |
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24 | static char rcsid = |
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25 | "@(#) $Id: SDL_video.h,v 1.3 2001/06/07 14:28:11 hercules Exp $"; |
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26 | #endif |
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27 | |||
28 | /* Header file for access to the SDL raw framebuffer window */ |
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29 | |||
30 | #ifndef _SDL_video_h |
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31 | #define _SDL_video_h |
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32 | |||
33 | #include |
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34 | |||
35 | #include "SDL_types.h" |
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36 | #include "SDL_mutex.h" |
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37 | #include "SDL_rwops.h" |
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38 | |||
39 | #include "begin_code.h" |
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40 | /* Set up for C function definitions, even when using C++ */ |
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41 | #ifdef __cplusplus |
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42 | extern "C" { |
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43 | #endif |
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44 | |||
45 | /* Transparency definitions: These define alpha as the opacity of a surface */ |
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46 | #define SDL_ALPHA_OPAQUE 255 |
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47 | #define SDL_ALPHA_TRANSPARENT 0 |
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48 | |||
49 | /* Useful data types */ |
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50 | typedef struct { |
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51 | Sint16 x, y; |
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52 | Uint16 w, h; |
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53 | } SDL_Rect; |
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54 | |||
55 | typedef struct { |
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56 | Uint8 r; |
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57 | Uint8 g; |
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58 | Uint8 b; |
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59 | Uint8 unused; |
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60 | } SDL_Color; |
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61 | |||
62 | typedef struct { |
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63 | int ncolors; |
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64 | SDL_Color *colors; |
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65 | } SDL_Palette; |
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66 | |||
67 | /* Everything in the pixel format structure is read-only */ |
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68 | typedef struct SDL_PixelFormat { |
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69 | SDL_Palette *palette; |
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70 | Uint8 BitsPerPixel; |
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71 | Uint8 BytesPerPixel; |
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72 | Uint8 Rloss; |
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73 | Uint8 Gloss; |
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74 | Uint8 Bloss; |
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75 | Uint8 Aloss; |
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76 | Uint8 Rshift; |
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77 | Uint8 Gshift; |
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78 | Uint8 Bshift; |
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79 | Uint8 Ashift; |
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80 | Uint32 Rmask; |
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81 | Uint32 Gmask; |
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82 | Uint32 Bmask; |
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83 | Uint32 Amask; |
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84 | |||
85 | /* RGB color key information */ |
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86 | Uint32 colorkey; |
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87 | /* Alpha value information (per-surface alpha) */ |
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88 | Uint8 alpha; |
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89 | } SDL_PixelFormat; |
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90 | |||
91 | /* typedef for private surface blitting functions */ |
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92 | struct SDL_Surface; |
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93 | typedef int (*SDL_blit)(struct SDL_Surface *src, SDL_Rect *srcrect, |
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94 | struct SDL_Surface *dst, SDL_Rect *dstrect); |
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95 | |||
96 | /* This structure should be treated as read-only, except for 'pixels', |
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97 | which, if not NULL, contains the raw pixel data for the surface. |
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98 | */ |
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99 | typedef struct SDL_Surface { |
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100 | Uint32 flags; /* Read-only */ |
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101 | SDL_PixelFormat *format; /* Read-only */ |
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102 | int w, h; /* Read-only */ |
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103 | Uint16 pitch; /* Read-only */ |
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104 | void *pixels; /* Read-write */ |
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105 | int offset; /* Private */ |
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106 | |||
107 | /* Hardware-specific surface info */ |
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108 | struct private_hwdata *hwdata; |
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109 | |||
110 | /* clipping information */ |
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111 | SDL_Rect clip_rect; /* Read-only */ |
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112 | Uint32 unused1; /* for binary compatibility */ |
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113 | |||
114 | /* Allow recursive locks */ |
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115 | Uint32 locked; /* Private */ |
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116 | |||
117 | /* info for fast blit mapping to other surfaces */ |
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118 | struct SDL_BlitMap *map; /* Private */ |
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119 | |||
120 | /* format version, bumped at every change to invalidate blit maps */ |
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121 | unsigned int format_version; /* Private */ |
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122 | |||
123 | /* Reference count -- used when freeing surface */ |
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124 | int refcount; /* Read-mostly */ |
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125 | } SDL_Surface; |
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126 | |||
127 | /* These are the currently supported flags for the SDL_surface */ |
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128 | /* Available for SDL_CreateRGBSurface() or SDL_SetVideoMode() */ |
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129 | #define SDL_SWSURFACE 0x00000000 /* Surface is in system memory */ |
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130 | #define SDL_HWSURFACE 0x00000001 /* Surface is in video memory */ |
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131 | #define SDL_ASYNCBLIT 0x00000004 /* Use asynchronous blits if possible */ |
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132 | /* Available for SDL_SetVideoMode() */ |
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133 | #define SDL_ANYFORMAT 0x10000000 /* Allow any video depth/pixel-format */ |
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134 | #define SDL_HWPALETTE 0x20000000 /* Surface has exclusive palette */ |
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135 | #define SDL_DOUBLEBUF 0x40000000 /* Set up double-buffered video mode */ |
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136 | #define SDL_FULLSCREEN 0x80000000 /* Surface is a full screen display */ |
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137 | #define SDL_OPENGL 0x00000002 /* Create an OpenGL rendering context */ |
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138 | #define SDL_OPENGLBLIT 0x0000000A /* Create an OpenGL rendering context and use it for blitting */ |
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139 | #define SDL_RESIZABLE 0x00000010 /* This video mode may be resized */ |
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140 | #define SDL_NOFRAME 0x00000020 /* No window caption or edge frame */ |
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141 | /* Used internally (read-only) */ |
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142 | #define SDL_HWACCEL 0x00000100 /* Blit uses hardware acceleration */ |
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143 | #define SDL_SRCCOLORKEY 0x00001000 /* Blit uses a source color key */ |
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144 | #define SDL_RLEACCELOK 0x00002000 /* Private flag */ |
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145 | #define SDL_RLEACCEL 0x00004000 /* Surface is RLE encoded */ |
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146 | #define SDL_SRCALPHA 0x00010000 /* Blit uses source alpha blending */ |
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147 | #define SDL_PREALLOC 0x01000000 /* Surface uses preallocated memory */ |
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148 | |||
149 | /* Evaluates to true if the surface needs to be locked before access */ |
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150 | #define SDL_MUSTLOCK(surface) \ |
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151 | (surface->offset || \ |
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152 | ((surface->flags & (SDL_HWSURFACE|SDL_ASYNCBLIT|SDL_RLEACCEL)) != 0)) |
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153 | |||
154 | |||
155 | /* Useful for determining the video hardware capabilities */ |
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156 | typedef struct { |
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157 | Uint32 hw_available :1; /* Flag: Can you create hardware surfaces? */ |
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158 | Uint32 wm_available :1; /* Flag: Can you talk to a window manager? */ |
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159 | Uint32 UnusedBits1 :6; |
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160 | Uint32 UnusedBits2 :1; |
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161 | Uint32 blit_hw :1; /* Flag: Accelerated blits HW --> HW */ |
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162 | Uint32 blit_hw_CC :1; /* Flag: Accelerated blits with Colorkey */ |
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163 | Uint32 blit_hw_A :1; /* Flag: Accelerated blits with Alpha */ |
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164 | Uint32 blit_sw :1; /* Flag: Accelerated blits SW --> HW */ |
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165 | Uint32 blit_sw_CC :1; /* Flag: Accelerated blits with Colorkey */ |
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166 | Uint32 blit_sw_A :1; /* Flag: Accelerated blits with Alpha */ |
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167 | Uint32 blit_fill :1; /* Flag: Accelerated color fill */ |
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168 | Uint32 UnusedBits3 :16; |
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169 | Uint32 video_mem; /* The total amount of video memory (in K) */ |
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170 | SDL_PixelFormat *vfmt; /* Value: The format of the video surface */ |
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171 | } SDL_VideoInfo; |
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172 | |||
173 | |||
174 | /* The most common video overlay formats. |
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175 | For an explanation of these pixel formats, see: |
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176 | http://www.webartz.com/fourcc/indexyuv.htm |
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177 | |||
178 | For information on the relationship between color spaces, see: |
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179 | http://www.neuro.sfc.keio.ac.jp/~aly/polygon/info/color-space-faq.html |
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180 | */ |
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181 | #define SDL_YV12_OVERLAY 0x32315659 /* Planar mode: Y + V + U (3 planes) */ |
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182 | #define SDL_IYUV_OVERLAY 0x56555949 /* Planar mode: Y + U + V (3 planes) */ |
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183 | #define SDL_YUY2_OVERLAY 0x32595559 /* Packed mode: Y0+U0+Y1+V0 (1 plane) */ |
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184 | #define SDL_UYVY_OVERLAY 0x59565955 /* Packed mode: U0+Y0+V0+Y1 (1 plane) */ |
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185 | #define SDL_YVYU_OVERLAY 0x55595659 /* Packed mode: Y0+V0+Y1+U0 (1 plane) */ |
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186 | |||
187 | /* The YUV hardware video overlay */ |
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188 | typedef struct SDL_Overlay { |
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189 | Uint32 format; /* Read-only */ |
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190 | int w, h; /* Read-only */ |
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191 | int planes; /* Read-only */ |
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192 | Uint16 *pitches; /* Read-only */ |
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193 | Uint8 **pixels; /* Read-write */ |
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194 | |||
195 | /* Hardware-specific surface info */ |
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196 | struct private_yuvhwfuncs *hwfuncs; |
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197 | struct private_yuvhwdata *hwdata; |
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198 | |||
199 | /* Special flags */ |
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200 | Uint32 hw_overlay :1; /* Flag: This overlay hardware accelerated? */ |
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201 | Uint32 UnusedBits :31; |
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202 | } SDL_Overlay; |
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203 | |||
204 | |||
205 | /* Public enumeration for setting the OpenGL window attributes. */ |
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206 | typedef enum { |
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207 | SDL_GL_RED_SIZE, |
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208 | SDL_GL_GREEN_SIZE, |
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209 | SDL_GL_BLUE_SIZE, |
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210 | SDL_GL_ALPHA_SIZE, |
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211 | SDL_GL_BUFFER_SIZE, |
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212 | SDL_GL_DOUBLEBUFFER, |
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213 | SDL_GL_DEPTH_SIZE, |
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214 | SDL_GL_STENCIL_SIZE, |
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215 | SDL_GL_ACCUM_RED_SIZE, |
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216 | SDL_GL_ACCUM_GREEN_SIZE, |
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217 | SDL_GL_ACCUM_BLUE_SIZE, |
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218 | SDL_GL_ACCUM_ALPHA_SIZE |
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219 | } SDL_GLattr; |
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220 | |||
221 | /* flags for SDL_SetPalette() */ |
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222 | #define SDL_LOGPAL 0x01 |
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223 | #define SDL_PHYSPAL 0x02 |
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224 | |||
225 | /* Function prototypes */ |
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226 | |||
227 | /* These functions are used internally, and should not be used unless you |
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228 | * have a specific need to specify the video driver you want to use. |
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229 | * You should normally use SDL_Init() or SDL_InitSubSystem(). |
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230 | * |
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231 | * SDL_VideoInit() initializes the video subsystem -- sets up a connection |
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232 | * to the window manager, etc, and determines the current video mode and |
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233 | * pixel format, but does not initialize a window or graphics mode. |
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234 | * Note that event handling is activated by this routine. |
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235 | * |
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236 | * If you use both sound and video in your application, you need to call |
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237 | * SDL_Init() before opening the sound device, otherwise under Win32 DirectX, |
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238 | * you won't be able to set full-screen display modes. |
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239 | */ |
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240 | extern DECLSPEC int SDL_VideoInit(const char *driver_name, Uint32 flags); |
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241 | extern DECLSPEC void SDL_VideoQuit(void); |
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242 | |||
243 | /* This function fills the given character buffer with the name of the |
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244 | * video driver, and returns a pointer to it if the video driver has |
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245 | * been initialized. It returns NULL if no driver has been initialized. |
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246 | */ |
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247 | extern DECLSPEC char *SDL_VideoDriverName(char *namebuf, int maxlen); |
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248 | |||
249 | /* |
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250 | * This function returns a pointer to the current display surface. |
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251 | * If SDL is doing format conversion on the display surface, this |
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252 | * function returns the publicly visible surface, not the real video |
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253 | * surface. |
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254 | */ |
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255 | extern DECLSPEC SDL_Surface * SDL_GetVideoSurface(void); |
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256 | |||
257 | /* |
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258 | * This function returns a read-only pointer to information about the |
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259 | * video hardware. If this is called before SDL_SetVideoMode(), the 'vfmt' |
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260 | * member of the returned structure will contain the pixel format of the |
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261 | * "best" video mode. |
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262 | */ |
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263 | extern DECLSPEC const SDL_VideoInfo * SDL_GetVideoInfo(void); |
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264 | |||
265 | /* |
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266 | * Check to see if a particular video mode is supported. |
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267 | * It returns 0 if the requested mode is not supported under any bit depth, |
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268 | * or returns the bits-per-pixel of the closest available mode with the |
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269 | * given width and height. If this bits-per-pixel is different from the |
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270 | * one used when setting the video mode, SDL_SetVideoMode() will succeed, |
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271 | * but will emulate the requested bits-per-pixel with a shadow surface. |
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272 | * |
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273 | * The arguments to SDL_VideoModeOK() are the same ones you would pass to |
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274 | * SDL_SetVideoMode() |
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275 | */ |
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276 | extern DECLSPEC int SDL_VideoModeOK(int width, int height, int bpp, Uint32 flags); |
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277 | |||
278 | /* |
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279 | * Return a pointer to an array of available screen dimensions for the |
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280 | * given format and video flags, sorted largest to smallest. Returns |
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281 | * NULL if there are no dimensions available for a particular format, |
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282 | * or (SDL_Rect **)-1 if any dimension is okay for the given format. |
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283 | * |
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284 | * If 'format' is NULL, the mode list will be for the format given |
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285 | * by SDL_GetVideoInfo()->vfmt |
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286 | */ |
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287 | extern DECLSPEC SDL_Rect ** SDL_ListModes(SDL_PixelFormat *format, Uint32 flags); |
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288 | |||
289 | /* |
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290 | * Set up a video mode with the specified width, height and bits-per-pixel. |
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291 | * |
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292 | * If 'bpp' is 0, it is treated as the current display bits per pixel. |
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293 | * |
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294 | * If SDL_ANYFORMAT is set in 'flags', the SDL library will try to set the |
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295 | * requested bits-per-pixel, but will return whatever video pixel format is |
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296 | * available. The default is to emulate the requested pixel format if it |
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297 | * is not natively available. |
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298 | * |
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299 | * If SDL_HWSURFACE is set in 'flags', the video surface will be placed in |
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300 | * video memory, if possible, and you may have to call SDL_LockSurface() |
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301 | * in order to access the raw framebuffer. Otherwise, the video surface |
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302 | * will be created in system memory. |
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303 | * |
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304 | * If SDL_ASYNCBLIT is set in 'flags', SDL will try to perform rectangle |
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305 | * updates asynchronously, but you must always lock before accessing pixels. |
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306 | * SDL will wait for updates to complete before returning from the lock. |
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307 | * |
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308 | * If SDL_HWPALETTE is set in 'flags', the SDL library will guarantee |
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309 | * that the colors set by SDL_SetColors() will be the colors you get. |
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310 | * Otherwise, in 8-bit mode, SDL_SetColors() may not be able to set all |
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311 | * of the colors exactly the way they are requested, and you should look |
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312 | * at the video surface structure to determine the actual palette. |
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313 | * If SDL cannot guarantee that the colors you request can be set, |
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314 | * i.e. if the colormap is shared, then the video surface may be created |
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315 | * under emulation in system memory, overriding the SDL_HWSURFACE flag. |
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316 | * |
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317 | * If SDL_FULLSCREEN is set in 'flags', the SDL library will try to set |
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318 | * a fullscreen video mode. The default is to create a windowed mode |
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319 | * if the current graphics system has a window manager. |
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320 | * If the SDL library is able to set a fullscreen video mode, this flag |
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321 | * will be set in the surface that is returned. |
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322 | * |
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323 | * If SDL_DOUBLEBUF is set in 'flags', the SDL library will try to set up |
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324 | * two surfaces in video memory and swap between them when you call |
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325 | * SDL_Flip(). This is usually slower than the normal single-buffering |
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326 | * scheme, but prevents "tearing" artifacts caused by modifying video |
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327 | * memory while the monitor is refreshing. It should only be used by |
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328 | * applications that redraw the entire screen on every update. |
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329 | * |
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330 | * If SDL_RESIZABLE is set in 'flags', the SDL library will allow the |
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331 | * window manager, if any, to resize the window at runtime. When this |
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332 | * occurs, SDL will send a SDL_VIDEORESIZE event to you application, |
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333 | * and you must respond to the event by re-calling SDL_SetVideoMode() |
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334 | * with the requested size (or another size that suits the application). |
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335 | * |
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336 | * If SDL_NOFRAME is set in 'flags', the SDL library will create a window |
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337 | * without any title bar or frame decoration. Fullscreen video modes have |
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338 | * this flag set automatically. |
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339 | * |
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340 | * This function returns the video framebuffer surface, or NULL if it fails. |
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341 | * |
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342 | * If you rely on functionality provided by certain video flags, check the |
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343 | * flags of the returned surface to make sure that functionality is available. |
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344 | * SDL will fall back to reduced functionality if the exact flags you wanted |
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345 | * are not available. |
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346 | */ |
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347 | extern DECLSPEC SDL_Surface *SDL_SetVideoMode |
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348 | (int width, int height, int bpp, Uint32 flags); |
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349 | |||
350 | /* |
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351 | * Makes sure the given list of rectangles is updated on the given screen. |
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352 | * If 'x', 'y', 'w' and 'h' are all 0, SDL_UpdateRect will update the entire |
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353 | * screen. |
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354 | * These functions should not be called while 'screen' is locked. |
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355 | */ |
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356 | extern DECLSPEC void SDL_UpdateRects |
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357 | (SDL_Surface *screen, int numrects, SDL_Rect *rects); |
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358 | extern DECLSPEC void SDL_UpdateRect |
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359 | (SDL_Surface *screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h); |
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360 | |||
361 | /* |
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362 | * On hardware that supports double-buffering, this function sets up a flip |
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363 | * and returns. The hardware will wait for vertical retrace, and then swap |
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364 | * video buffers before the next video surface blit or lock will return. |
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365 | * On hardware that doesn not support double-buffering, this is equivalent |
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366 | * to calling SDL_UpdateRect(screen, 0, 0, 0, 0); |
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367 | * The SDL_DOUBLEBUF flag must have been passed to SDL_SetVideoMode() when |
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368 | * setting the video mode for this function to perform hardware flipping. |
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369 | * This function returns 0 if successful, or -1 if there was an error. |
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370 | */ |
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371 | extern DECLSPEC int SDL_Flip(SDL_Surface *screen); |
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372 | |||
373 | /* |
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374 | * Set the gamma correction for each of the color channels. |
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375 | * The gamma values range (approximately) between 0.1 and 10.0 |
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376 | * |
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377 | * If this function isn't supported directly by the hardware, it will |
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378 | * be emulated using gamma ramps, if available. If successful, this |
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379 | * function returns 0, otherwise it returns -1. |
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380 | */ |
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381 | extern DECLSPEC int SDL_SetGamma(float red, float green, float blue); |
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382 | |||
383 | /* |
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384 | * Set the gamma translation table for the red, green, and blue channels |
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385 | * of the video hardware. Each table is an array of 256 16-bit quantities, |
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386 | * representing a mapping between the input and output for that channel. |
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387 | * The input is the index into the array, and the output is the 16-bit |
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388 | * gamma value at that index, scaled to the output color precision. |
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389 | * |
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390 | * You may pass NULL for any of the channels to leave it unchanged. |
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391 | * If the call succeeds, it will return 0. If the display driver or |
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392 | * hardware does not support gamma translation, or otherwise fails, |
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393 | * this function will return -1. |
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394 | */ |
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395 | extern DECLSPEC int SDL_SetGammaRamp(Uint16 *red, Uint16 *green, Uint16 *blue); |
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396 | |||
397 | /* |
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398 | * Retrieve the current values of the gamma translation tables. |
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399 | * |
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400 | * You must pass in valid pointers to arrays of 256 16-bit quantities. |
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401 | * Any of the pointers may be NULL to ignore that channel. |
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402 | * If the call succeeds, it will return 0. If the display driver or |
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403 | * hardware does not support gamma translation, or otherwise fails, |
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404 | * this function will return -1. |
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405 | */ |
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406 | extern DECLSPEC int SDL_GetGammaRamp(Uint16 *red, Uint16 *green, Uint16 *blue); |
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407 | |||
408 | /* |
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409 | * Sets a portion of the colormap for the given 8-bit surface. If 'surface' |
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410 | * is not a palettized surface, this function does nothing, returning 0. |
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411 | * If all of the colors were set as passed to SDL_SetColors(), it will |
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412 | * return 1. If not all the color entries were set exactly as given, |
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413 | * it will return 0, and you should look at the surface palette to |
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414 | * determine the actual color palette. |
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415 | * |
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416 | * When 'surface' is the surface associated with the current display, the |
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417 | * display colormap will be updated with the requested colors. If |
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418 | * SDL_HWPALETTE was set in SDL_SetVideoMode() flags, SDL_SetColors() |
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419 | * will always return 1, and the palette is guaranteed to be set the way |
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420 | * you desire, even if the window colormap has to be warped or run under |
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421 | * emulation. |
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422 | */ |
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423 | extern DECLSPEC int SDL_SetColors(SDL_Surface *surface, |
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424 | SDL_Color *colors, int firstcolor, int ncolors); |
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425 | |||
426 | /* |
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427 | * Sets a portion of the colormap for a given 8-bit surface. |
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428 | * 'flags' is one or both of: |
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429 | * SDL_LOGPAL -- set logical palette, which controls how blits are mapped |
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430 | * to/from the surface, |
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431 | * SDL_PHYSPAL -- set physical palette, which controls how pixels look on |
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432 | * the screen |
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433 | * Only screens have physical palettes. Separate change of physical/logical |
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434 | * palettes is only possible if the screen has SDL_HWPALETTE set. |
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435 | * |
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436 | * The return value is 1 if all colours could be set as requested, and 0 |
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437 | * otherwise. |
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438 | * |
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439 | * SDL_SetColors() is equivalent to calling this function with |
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440 | * flags = (SDL_LOGPAL|SDL_PHYSPAL). |
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441 | */ |
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442 | extern DECLSPEC int SDL_SetPalette(SDL_Surface *surface, int flags, |
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443 | SDL_Color *colors, int firstcolor, |
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444 | int ncolors); |
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445 | |||
446 | /* |
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447 | * Maps an RGB triple to an opaque pixel value for a given pixel format |
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448 | */ |
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449 | extern DECLSPEC Uint32 SDL_MapRGB |
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450 | (SDL_PixelFormat *format, Uint8 r, Uint8 g, Uint8 b); |
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451 | |||
452 | /* |
||
453 | * Maps an RGBA quadruple to a pixel value for a given pixel format |
||
454 | */ |
||
455 | extern DECLSPEC Uint32 SDL_MapRGBA(SDL_PixelFormat *format, |
||
456 | Uint8 r, Uint8 g, Uint8 b, Uint8 a); |
||
457 | |||
458 | /* |
||
459 | * Maps a pixel value into the RGB components for a given pixel format |
||
460 | */ |
||
461 | extern DECLSPEC void SDL_GetRGB(Uint32 pixel, SDL_PixelFormat *fmt, |
||
462 | Uint8 *r, Uint8 *g, Uint8 *b); |
||
463 | |||
464 | /* |
||
465 | * Maps a pixel value into the RGBA components for a given pixel format |
||
466 | */ |
||
467 | extern DECLSPEC void SDL_GetRGBA(Uint32 pixel, SDL_PixelFormat *fmt, |
||
468 | Uint8 *r, Uint8 *g, Uint8 *b, Uint8 *a); |
||
469 | |||
470 | /* |
||
471 | * Allocate and free an RGB surface (must be called after SDL_SetVideoMode) |
||
472 | * If the depth is 4 or 8 bits, an empty palette is allocated for the surface. |
||
473 | * If the depth is greater than 8 bits, the pixel format is set using the |
||
474 | * flags '[RGB]mask'. |
||
475 | * If the function runs out of memory, it will return NULL. |
||
476 | * |
||
477 | * The 'flags' tell what kind of surface to create. |
||
478 | * SDL_SWSURFACE means that the surface should be created in system memory. |
||
479 | * SDL_HWSURFACE means that the surface should be created in video memory, |
||
480 | * with the same format as the display surface. This is useful for surfaces |
||
481 | * that will not change much, to take advantage of hardware acceleration |
||
482 | * when being blitted to the display surface. |
||
483 | * SDL_ASYNCBLIT means that SDL will try to perform asynchronous blits with |
||
484 | * this surface, but you must always lock it before accessing the pixels. |
||
485 | * SDL will wait for current blits to finish before returning from the lock. |
||
486 | * SDL_SRCCOLORKEY indicates that the surface will be used for colorkey blits. |
||
487 | * If the hardware supports acceleration of colorkey blits between |
||
488 | * two surfaces in video memory, SDL will try to place the surface in |
||
489 | * video memory. If this isn't possible or if there is no hardware |
||
490 | * acceleration available, the surface will be placed in system memory. |
||
491 | * SDL_SRCALPHA means that the surface will be used for alpha blits and |
||
492 | * if the hardware supports hardware acceleration of alpha blits between |
||
493 | * two surfaces in video memory, to place the surface in video memory |
||
494 | * if possible, otherwise it will be placed in system memory. |
||
495 | * If the surface is created in video memory, blits will be _much_ faster, |
||
496 | * but the surface format must be identical to the video surface format, |
||
497 | * and the only way to access the pixels member of the surface is to use |
||
498 | * the SDL_LockSurface() and SDL_UnlockSurface() calls. |
||
499 | * If the requested surface actually resides in video memory, SDL_HWSURFACE |
||
500 | * will be set in the flags member of the returned surface. If for some |
||
501 | * reason the surface could not be placed in video memory, it will not have |
||
502 | * the SDL_HWSURFACE flag set, and will be created in system memory instead. |
||
503 | */ |
||
504 | #define SDL_AllocSurface SDL_CreateRGBSurface |
||
505 | extern DECLSPEC SDL_Surface *SDL_CreateRGBSurface |
||
506 | (Uint32 flags, int width, int height, int depth, |
||
507 | Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask); |
||
508 | extern DECLSPEC SDL_Surface *SDL_CreateRGBSurfaceFrom(void *pixels, |
||
509 | int width, int height, int depth, int pitch, |
||
510 | Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask); |
||
511 | extern DECLSPEC void SDL_FreeSurface(SDL_Surface *surface); |
||
512 | |||
513 | /* |
||
514 | * SDL_LockSurface() sets up a surface for directly accessing the pixels. |
||
515 | * Between calls to SDL_LockSurface()/SDL_UnlockSurface(), you can write |
||
516 | * to and read from 'surface->pixels', using the pixel format stored in |
||
517 | * 'surface->format'. Once you are done accessing the surface, you should |
||
518 | * use SDL_UnlockSurface() to release it. |
||
519 | * |
||
520 | * Not all surfaces require locking. If SDL_MUSTLOCK(surface) evaluates |
||
521 | * to 0, then you can read and write to the surface at any time, and the |
||
522 | * pixel format of the surface will not change. In particular, if the |
||
523 | * SDL_HWSURFACE flag is not given when calling SDL_SetVideoMode(), you |
||
524 | * will not need to lock the display surface before accessing it. |
||
525 | * |
||
526 | * No operating system or library calls should be made between lock/unlock |
||
527 | * pairs, as critical system locks may be held during this time. |
||
528 | * |
||
529 | * SDL_LockSurface() returns 0, or -1 if the surface couldn't be locked. |
||
530 | */ |
||
531 | extern DECLSPEC int SDL_LockSurface(SDL_Surface *surface); |
||
532 | extern DECLSPEC void SDL_UnlockSurface(SDL_Surface *surface); |
||
533 | |||
534 | /* |
||
535 | * Load a surface from a seekable SDL data source (memory or file.) |
||
536 | * If 'freesrc' is non-zero, the source will be closed after being read. |
||
537 | * Returns the new surface, or NULL if there was an error. |
||
538 | * The new surface should be freed with SDL_FreeSurface(). |
||
539 | */ |
||
540 | //extern DECLSPEC SDL_Surface * SDL_LoadBMP_RW(SDL_RWops *src, int freesrc); |
||
541 | |||
542 | /* Convenience macro -- load a surface from a file */ |
||
543 | #define SDL_LoadBMP(file) SDL_LoadBMP_RW(SDL_RWFromFile(file, "rb"), 1) |
||
544 | |||
545 | /* |
||
546 | * Save a surface to a seekable SDL data source (memory or file.) |
||
547 | * If 'freedst' is non-zero, the source will be closed after being written. |
||
548 | * Returns 0 if successful or -1 if there was an error. |
||
549 | */ |
||
550 | extern DECLSPEC int SDL_SaveBMP_RW |
||
551 | (SDL_Surface *surface, SDL_RWops *dst, int freedst); |
||
552 | |||
553 | /* Convenience macro -- save a surface to a file */ |
||
554 | #define SDL_SaveBMP(surface, file) \ |
||
555 | SDL_SaveBMP_RW(surface, SDL_RWFromFile(file, "wb"), 1) |
||
556 | |||
557 | /* |
||
558 | * Sets the color key (transparent pixel) in a blittable surface. |
||
559 | * If 'flag' is SDL_SRCCOLORKEY (optionally OR'd with SDL_RLEACCEL), |
||
560 | * 'key' will be the transparent pixel in the source image of a blit. |
||
561 | * SDL_RLEACCEL requests RLE acceleration for the surface if present, |
||
562 | * and removes RLE acceleration if absent. |
||
563 | * If 'flag' is 0, this function clears any current color key. |
||
564 | * This function returns 0, or -1 if there was an error. |
||
565 | */ |
||
566 | extern DECLSPEC int SDL_SetColorKey |
||
567 | (SDL_Surface *surface, Uint32 flag, Uint32 key); |
||
568 | |||
569 | /* |
||
570 | * This function sets the alpha value for the entire surface, as opposed to |
||
571 | * using the alpha component of each pixel. This value measures the range |
||
572 | * of transparency of the surface, 0 being completely transparent to 255 |
||
573 | * being completely opaque. An 'alpha' value of 255 causes blits to be |
||
574 | * opaque, the source pixels copied to the destination (the default). Note |
||
575 | * that per-surface alpha can be combined with colorkey transparency. |
||
576 | * |
||
577 | * If 'flag' is 0, alpha blending is disabled for the surface. |
||
578 | * If 'flag' is SDL_SRCALPHA, alpha blending is enabled for the surface. |
||
579 | * OR:ing the flag with SDL_RLEACCEL requests RLE acceleration for the |
||
580 | * surface; if SDL_RLEACCEL is not specified, the RLE accel will be removed. |
||
581 | */ |
||
582 | extern DECLSPEC int SDL_SetAlpha(SDL_Surface *surface, Uint32 flag, Uint8 alpha); |
||
583 | |||
584 | /* |
||
585 | * Sets the clipping rectangle for the destination surface in a blit. |
||
586 | * |
||
587 | * If the clip rectangle is NULL, clipping will be disabled. |
||
588 | * If the clip rectangle doesn't intersect the surface, the function will |
||
589 | * return SDL_FALSE and blits will be completely clipped. Otherwise the |
||
590 | * function returns SDL_TRUE and blits to the surface will be clipped to |
||
591 | * the intersection of the surface area and the clipping rectangle. |
||
592 | * |
||
593 | * Note that blits are automatically clipped to the edges of the source |
||
594 | * and destination surfaces. |
||
595 | */ |
||
596 | extern DECLSPEC SDL_bool SDL_SetClipRect(SDL_Surface *surface, SDL_Rect *rect); |
||
597 | |||
598 | /* |
||
599 | * Gets the clipping rectangle for the destination surface in a blit. |
||
600 | * 'rect' must be a pointer to a valid rectangle which will be filled |
||
601 | * with the correct values. |
||
602 | */ |
||
603 | extern DECLSPEC void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect); |
||
604 | |||
605 | /* |
||
606 | * Creates a new surface of the specified format, and then copies and maps |
||
607 | * the given surface to it so the blit of the converted surface will be as |
||
608 | * fast as possible. If this function fails, it returns NULL. |
||
609 | * |
||
610 | * The 'flags' parameter is passed to SDL_CreateRGBSurface() and has those |
||
611 | * semantics. You can also pass SDL_RLEACCEL in the flags parameter and |
||
612 | * SDL will try to RLE accelerate colorkey and alpha blits in the resulting |
||
613 | * surface. |
||
614 | * |
||
615 | * This function is used internally by SDL_DisplayFormat(). |
||
616 | */ |
||
617 | extern DECLSPEC SDL_Surface *SDL_ConvertSurface |
||
618 | (SDL_Surface *src, SDL_PixelFormat *fmt, Uint32 flags); |
||
619 | |||
620 | /* |
||
621 | * This performs a fast blit from the source surface to the destination |
||
622 | * surface. It assumes that the source and destination rectangles are |
||
623 | * the same size. If either 'srcrect' or 'dstrect' are NULL, the entire |
||
624 | * surface (src or dst) is copied. The final blit rectangles are saved |
||
625 | * in 'srcrect' and 'dstrect' after all clipping is performed. |
||
626 | * If the blit is successful, it returns 0, otherwise it returns -1. |
||
627 | * |
||
628 | * The blit function should not be called on a locked surface. |
||
629 | * |
||
630 | * The blit semantics for surfaces with and without alpha and colorkey |
||
631 | * are defined as follows: |
||
632 | * |
||
633 | * RGBA->RGB: |
||
634 | * SDL_SRCALPHA set: |
||
635 | * alpha-blend (using alpha-channel). |
||
636 | * SDL_SRCCOLORKEY ignored. |
||
637 | * SDL_SRCALPHA not set: |
||
638 | * copy RGB. |
||
639 | * if SDL_SRCCOLORKEY set, only copy the pixels matching the |
||
640 | * RGB values of the source colour key, ignoring alpha in the |
||
641 | * comparison. |
||
642 | * |
||
643 | * RGB->RGBA: |
||
644 | * SDL_SRCALPHA set: |
||
645 | * alpha-blend (using the source per-surface alpha value); |
||
646 | * set destination alpha to opaque. |
||
647 | * SDL_SRCALPHA not set: |
||
648 | * copy RGB, set destination alpha to opaque. |
||
649 | * both: |
||
650 | * if SDL_SRCCOLORKEY set, only copy the pixels matching the |
||
651 | * source colour key. |
||
652 | * |
||
653 | * RGBA->RGBA: |
||
654 | * SDL_SRCALPHA set: |
||
655 | * alpha-blend (using the source alpha channel) the RGB values; |
||
656 | * leave destination alpha untouched. [Note: is this correct?] |
||
657 | * SDL_SRCCOLORKEY ignored. |
||
658 | * SDL_SRCALPHA not set: |
||
659 | * copy all of RGBA to the destination. |
||
660 | * if SDL_SRCCOLORKEY set, only copy the pixels matching the |
||
661 | * RGB values of the source colour key, ignoring alpha in the |
||
662 | * comparison. |
||
663 | * |
||
664 | * RGB->RGB: |
||
665 | * SDL_SRCALPHA set: |
||
666 | * alpha-blend (using the source per-surface alpha value). |
||
667 | * SDL_SRCALPHA not set: |
||
668 | * copy RGB. |
||
669 | * both: |
||
670 | * if SDL_SRCCOLORKEY set, only copy the pixels matching the |
||
671 | * source colour key. |
||
672 | * |
||
673 | * If either of the surfaces were in video memory, and the blit returns -2, |
||
674 | * the video memory was lost, so it should be reloaded with artwork and |
||
675 | * re-blitted: |
||
676 | while ( SDL_BlitSurface(image, imgrect, screen, dstrect) == -2 ) { |
||
677 | while ( SDL_LockSurface(image) < 0 ) |
||
678 | Sleep(10); |
||
679 | -- Write image pixels to image->pixels -- |
||
680 | SDL_UnlockSurface(image); |
||
681 | } |
||
682 | * This happens under DirectX 5.0 when the system switches away from your |
||
683 | * fullscreen application. The lock will also fail until you have access |
||
684 | * to the video memory again. |
||
685 | */ |
||
686 | /* You should call SDL_BlitSurface() unless you know exactly how SDL |
||
687 | blitting works internally and how to use the other blit functions. |
||
688 | */ |
||
689 | #define SDL_BlitSurface SDL_UpperBlit |
||
690 | |||
691 | /* This is the public blit function, SDL_BlitSurface(), and it performs |
||
692 | rectangle validation and clipping before passing it to SDL_LowerBlit() |
||
693 | */ |
||
694 | extern DECLSPEC int SDL_UpperBlit |
||
695 | (SDL_Surface *src, SDL_Rect *srcrect, |
||
696 | SDL_Surface *dst, SDL_Rect *dstrect); |
||
697 | /* This is a semi-private blit function and it performs low-level surface |
||
698 | blitting only. |
||
699 | */ |
||
700 | extern DECLSPEC int SDL_LowerBlit |
||
701 | (SDL_Surface *src, SDL_Rect *srcrect, |
||
702 | SDL_Surface *dst, SDL_Rect *dstrect); |
||
703 | |||
704 | /* |
||
705 | * This function performs a fast fill of the given rectangle with 'color' |
||
706 | * The given rectangle is clipped to the destination surface clip area |
||
707 | * and the final fill rectangle is saved in the passed in pointer. |
||
708 | * If 'dstrect' is NULL, the whole surface will be filled with 'color' |
||
709 | * The color should be a pixel of the format used by the surface, and |
||
710 | * can be generated by the SDL_MapRGB() function. |
||
711 | * This function returns 0 on success, or -1 on error. |
||
712 | */ |
||
713 | extern DECLSPEC int SDL_FillRect |
||
714 | (SDL_Surface *dst, SDL_Rect *dstrect, Uint32 color); |
||
715 | |||
716 | /* |
||
717 | * This function takes a surface and copies it to a new surface of the |
||
718 | * pixel format and colors of the video framebuffer, suitable for fast |
||
719 | * blitting onto the display surface. It calls SDL_ConvertSurface() |
||
720 | * |
||
721 | * If you want to take advantage of hardware colorkey or alpha blit |
||
722 | * acceleration, you should set the colorkey and alpha value before |
||
723 | * calling this function. |
||
724 | * |
||
725 | * If the conversion fails or runs out of memory, it returns NULL |
||
726 | */ |
||
727 | extern DECLSPEC SDL_Surface * SDL_DisplayFormat(SDL_Surface *surface); |
||
728 | |||
729 | /* |
||
730 | * This function takes a surface and copies it to a new surface of the |
||
731 | * pixel format and colors of the video framebuffer (if possible), |
||
732 | * suitable for fast alpha blitting onto the display surface. |
||
733 | * The new surface will always have an alpha channel. |
||
734 | * |
||
735 | * If you want to take advantage of hardware colorkey or alpha blit |
||
736 | * acceleration, you should set the colorkey and alpha value before |
||
737 | * calling this function. |
||
738 | * |
||
739 | * If the conversion fails or runs out of memory, it returns NULL |
||
740 | */ |
||
741 | extern DECLSPEC SDL_Surface * SDL_DisplayFormatAlpha(SDL_Surface *surface); |
||
742 | |||
743 | |||
744 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
||
745 | /* YUV video surface overlay functions */ |
||
746 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
||
747 | |||
748 | /* This function creates a video output overlay |
||
749 | Calling the returned surface an overlay is something of a misnomer because |
||
750 | the contents of the display surface underneath the area where the overlay |
||
751 | is shown is undefined - it may be overwritten with the converted YUV data. |
||
752 | */ |
||
753 | extern DECLSPEC SDL_Overlay *SDL_CreateYUVOverlay(int width, int height, |
||
754 | Uint32 format, SDL_Surface *display); |
||
755 | |||
756 | /* Lock an overlay for direct access, and unlock it when you are done */ |
||
757 | extern DECLSPEC int SDL_LockYUVOverlay(SDL_Overlay *overlay); |
||
758 | extern DECLSPEC void SDL_UnlockYUVOverlay(SDL_Overlay *overlay); |
||
759 | |||
760 | /* Blit a video overlay to the display surface. |
||
761 | The contents of the video surface underneath the blit destination are |
||
762 | not defined. |
||
763 | The width and height of the destination rectangle may be different from |
||
764 | that of the overlay, but currently only 2x scaling is supported. |
||
765 | */ |
||
766 | extern DECLSPEC int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect); |
||
767 | |||
768 | /* Free a video overlay */ |
||
769 | extern DECLSPEC void SDL_FreeYUVOverlay(SDL_Overlay *overlay); |
||
770 | |||
771 | |||
772 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
||
773 | /* OpenGL support functions. */ |
||
774 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
||
775 | |||
776 | /* |
||
777 | * Dynamically load a GL driver, if SDL is built with dynamic GL. |
||
778 | * |
||
779 | * SDL links normally with the OpenGL library on your system by default, |
||
780 | * but you can compile it to dynamically load the GL driver at runtime. |
||
781 | * If you do this, you need to retrieve all of the GL functions used in |
||
782 | * your program from the dynamic library using SDL_GL_GetProcAddress(). |
||
783 | * |
||
784 | * This is disabled in default builds of SDL. |
||
785 | */ |
||
786 | extern DECLSPEC int SDL_GL_LoadLibrary(const char *path); |
||
787 | |||
788 | /* |
||
789 | * Get the address of a GL function (for extension functions) |
||
790 | */ |
||
791 | extern DECLSPEC void *SDL_GL_GetProcAddress(const char* proc); |
||
792 | |||
793 | /* |
||
794 | * Set an attribute of the OpenGL subsystem before intialization. |
||
795 | */ |
||
796 | extern DECLSPEC int SDL_GL_SetAttribute(SDL_GLattr attr, int value); |
||
797 | |||
798 | /* |
||
799 | * Get an attribute of the OpenGL subsystem from the windowing |
||
800 | * interface, such as glX. This is of course different from getting |
||
801 | * the values from SDL's internal OpenGL subsystem, which only |
||
802 | * stores the values you request before initialization. |
||
803 | * |
||
804 | * Developers should track the values they pass into SDL_GL_SetAttribute |
||
805 | * themselves if they want to retrieve these values. |
||
806 | */ |
||
807 | extern DECLSPEC int SDL_GL_GetAttribute(SDL_GLattr attr, int* value); |
||
808 | |||
809 | /* |
||
810 | * Swap the OpenGL buffers, if double-buffering is supported. |
||
811 | */ |
||
812 | extern DECLSPEC void SDL_GL_SwapBuffers(void); |
||
813 | |||
814 | /* |
||
815 | * Internal functions that should not be called unless you have read |
||
816 | * and understood the source code for these functions. |
||
817 | */ |
||
818 | extern DECLSPEC void SDL_GL_UpdateRects(int numrects, SDL_Rect* rects); |
||
819 | extern DECLSPEC void SDL_GL_Lock(void); |
||
820 | extern DECLSPEC void SDL_GL_Unlock(void); |
||
821 | |||
822 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
||
823 | /* These functions allow interaction with the window manager, if any. */ |
||
824 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ |
||
825 | |||
826 | /* |
||
827 | * Sets/Gets the title and icon text of the display window |
||
828 | */ |
||
829 | extern DECLSPEC void SDL_WM_SetCaption(const char *title, const char *icon); |
||
830 | extern DECLSPEC void SDL_WM_GetCaption(char **title, char **icon); |
||
831 | |||
832 | /* |
||
833 | * Sets the icon for the display window. |
||
834 | * This function must be called before the first call to SDL_SetVideoMode(). |
||
835 | * It takes an icon surface, and a mask in MSB format. |
||
836 | * If 'mask' is NULL, the entire icon surface will be used as the icon. |
||
837 | */ |
||
838 | extern DECLSPEC void SDL_WM_SetIcon(SDL_Surface *icon, Uint8 *mask); |
||
839 | |||
840 | /* |
||
841 | * This function iconifies the window, and returns 1 if it succeeded. |
||
842 | * If the function succeeds, it generates an SDL_APPACTIVE loss event. |
||
843 | * This function is a noop and returns 0 in non-windowed environments. |
||
844 | */ |
||
845 | extern DECLSPEC int SDL_WM_IconifyWindow(void); |
||
846 | |||
847 | /* |
||
848 | * Toggle fullscreen mode without changing the contents of the screen. |
||
849 | * If the display surface does not require locking before accessing |
||
850 | * the pixel information, then the memory pointers will not change. |
||
851 | * |
||
852 | * If this function was able to toggle fullscreen mode (change from |
||
853 | * running in a window to fullscreen, or vice-versa), it will return 1. |
||
854 | * If it is not implemented, or fails, it returns 0. |
||
855 | * |
||
856 | * The next call to SDL_SetVideoMode() will set the mode fullscreen |
||
857 | * attribute based on the flags parameter - if SDL_FULLSCREEN is not |
||
858 | * set, then the display will be windowed by default where supported. |
||
859 | * |
||
860 | * This is currently only implemented in the X11 video driver. |
||
861 | */ |
||
862 | extern DECLSPEC int SDL_WM_ToggleFullScreen(SDL_Surface *surface); |
||
863 | |||
864 | /* |
||
865 | * This function allows you to set and query the input grab state of |
||
866 | * the application. It returns the new input grab state. |
||
867 | */ |
||
868 | typedef enum { |
||
869 | SDL_GRAB_QUERY = -1, |
||
870 | SDL_GRAB_OFF = 0, |
||
871 | SDL_GRAB_ON = 1, |
||
872 | SDL_GRAB_FULLSCREEN /* Used internally */ |
||
873 | } SDL_GrabMode; |
||
874 | /* |
||
875 | * Grabbing means that the mouse is confined to the application window, |
||
876 | * and nearly all keyboard input is passed directly to the application, |
||
877 | * and not interpreted by a window manager, if any. |
||
878 | */ |
||
879 | extern DECLSPEC SDL_GrabMode SDL_WM_GrabInput(SDL_GrabMode mode); |
||
880 | |||
881 | /* Not in public API at the moment - do not use! */ |
||
882 | extern DECLSPEC int SDL_SoftStretch(SDL_Surface *src, SDL_Rect *srcrect, |
||
883 | SDL_Surface *dst, SDL_Rect *dstrect); |
||
884 | |||
885 | /* Ends C function definitions when using C++ */ |
||
886 | #ifdef __cplusplus |
||
887 | } |
||
888 | #endif |
||
889 | #include "close_code.h" |
||
890 | |||
891 | #endif /* _SDL_video_h */> |