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2 This is a list of API changes in SDL's version history. |
2 This is a list of API changes in SDL's version history. |
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4 1.3.0: |
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5 Added SDL_GetNumVideoDrivers() and SDL_GetVideoDriver(). |
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6 Replaced SDL_VideoDriverName() with SDL_GetCurrentVideoDriver() |
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7 Added SDL_GetNumAudioDrivers() and SDL_GetAudioDriver(). |
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8 Replaced SDL_AudioDriverName() with SDL_GetCurrentAudioDriver() |
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9 |
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10 1.2.10: |
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11 If SDL_OpenAudio() is passed zero for the desired format |
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12 fields, the following environment variables will be used |
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13 to fill them in: |
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14 SDL_AUDIO_FREQUENCY |
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15 SDL_AUDIO_FORMAT |
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16 SDL_AUDIO_CHANNELS |
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17 SDL_AUDIO_SAMPLES |
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18 If an environment variable is not specified, it will be set |
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19 to a reasonable default value. |
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20 |
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21 Added support for the SDL_VIDEO_FULLSCREEN_HEAD environment |
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22 variable, currently supported on X11 Xinerama configurations. |
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23 |
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24 Added SDL_GL_SWAP_CONTROL to wait for vsync in OpenGL applications. |
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25 |
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26 Added SDL_GL_ACCELERATED_VISUAL to guarantee hardware acceleration. |
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27 |
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28 Added current_w and current_h to the SDL_VideoInfo structure, |
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29 which is set to the desktop resolution during video intialization, |
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30 and then set to the current resolution when a video mode is set. |
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31 |
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32 SDL_SetVideoMode() now accepts 0 for width or height and will use |
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33 the current video mode (or the desktop mode if no mode has been set.) |
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34 |
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35 Added SDL_GetKeyRepeat() |
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36 |
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37 Added SDL_config.h, with defaults for various build environments. |
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38 |
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39 1.2.7: |
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40 Added CPU feature detection functions to SDL_cpuinfo.h: |
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41 SDL_HasRDTSC(), SDL_HasMMX(), SDL_Has3DNow(), SDL_HasSSE(), |
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42 SDL_HasAltiVec() |
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43 Added function to create RWops from const memory: SDL_RWFromConstMem() |
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44 |
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45 1.2.6: |
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46 Added SDL_LoadObject(), SDL_LoadFunction(), and SDL_UnloadObject() |
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47 |
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48 Added SDL_GL_MULTISAMPLEBUFFERS and SDL_GL_MULTISAMPLESAMPLES for FSAA |
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49 |
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50 1.2.5: |
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51 Added SDL_BUTTON_WHEELUP (4) and SDL_BUTTON_WHEELDOWN (5) |
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52 |
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53 Added SDL_GL_STEREO for stereoscopic OpenGL contexts |
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54 |
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55 1.2.0: |
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56 Added SDL_VIDEOEXPOSE event to signal that the screen needs to |
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57 be redrawn. This is currently only delivered to OpenGL windows |
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58 on X11, though it may be delivered in the future when the video |
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59 memory is lost under DirectX. |
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60 |
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61 1.1.8: |
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62 You can pass SDL_NOFRAME to SDL_VideoMode() to create a window |
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63 that has no title bar or frame decoration. Fullscreen video |
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64 modes automatically have this flag set. |
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65 |
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66 Added a function to query the clipping rectangle for a surface: |
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67 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect) |
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68 |
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69 Added a function to query the current event filter: |
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70 SDL_EventFilter SDL_GetEventFilter(void) |
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71 |
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72 If you pass -1 to SDL_ShowCursor(), it won't change the current |
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73 cursor visibility state, but will still return it. |
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74 |
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75 SDL_LockSurface() and SDL_UnlockSurface() are recursive, meaning |
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76 you can nest them as deep as you want, as long as each lock call |
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77 has a matching unlock call. The surface remains locked until the |
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78 last matching unlock call. |
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79 |
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80 Note that you may not blit to or from a locked surface. |
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81 |
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82 1.1.7: |
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83 The SDL_SetGammaRamp() and SDL_GetGammaRamp() functions now take |
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84 arrays of Uint16 values instead of Uint8 values. For the most part, |
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85 you can just take your old values and shift them up 8 bits to get |
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86 new correct values for your gamma ramps. |
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87 |
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88 You can pass SDL_RLEACCEL in flags passed to SDL_ConvertSurface() |
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89 and SDL will try to RLE accelerate colorkey and alpha blits in the |
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90 resulting surface. |
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91 |
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92 1.1.6: |
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93 Added a function to return the thread ID of a specific thread: |
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94 Uint32 SDL_GetThreadID(SDL_Thread *thread) |
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95 If 'thread' is NULL, this function returns the id for this thread. |
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96 |
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97 1.1.5: |
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98 The YUV overlay structure has been changed to use an array of |
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99 pitches and pixels representing the planes of a YUV image, to |
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100 better enable hardware acceleration. The YV12 and IYUV formats |
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101 each have three planes, corresponding to the Y, U, and V portions |
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102 of the image, while packed pixel YUV formats just have one plane. |
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103 |
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104 For palettized mode (8bpp), the screen colormap is now split in |
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105 a physical and a logical palette. The physical palette determines |
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106 what colours the screen pixels will get when displayed, and the |
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107 logical palette controls the mapping from blits to/from the screen. |
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108 A new function, SDL_SetPalette() has been added to change |
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109 logical and physical palettes separately. SDL_SetColors() works |
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110 just as before, and is equivalent to calling SDL_SetPalette() with |
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111 a flag argument of (SDL_LOGPAL|SDL_PHYSPAL). |
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112 |
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113 SDL_BlitSurface() no longer modifies the source rectangle, only the |
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114 destination rectangle. The width/height members of the destination |
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115 rectangle are ignored, only the position is used. |
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116 |
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117 The old source clipping function SDL_SetClipping() has been replaced |
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118 with a more useful function to set the destination clipping rectangle: |
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119 SDL_bool SDL_SetClipRect(SDL_Surface *surface, SDL_Rect *rect) |
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120 |
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121 Added a function to see what subsystems have been initialized: |
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122 Uint32 SDL_WasInit(Uint32 flags) |
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123 |
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124 The Big Alpha Flip: SDL now treats alpha as opacity like everybody |
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125 else, and not as transparency: |
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126 |
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127 A new cpp symbol: SDL_ALPHA_OPAQUE is defined as 255 |
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128 A new cpp symbol: SDL_ALPHA_TRANSPARENT is defined as 0 |
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129 Values between 0 and 255 vary from fully transparent to fully opaque. |
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130 |
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131 New functions: |
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132 SDL_DisplayFormatAlpha() |
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133 Returns a surface converted to a format with alpha-channel |
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134 that can be blit efficiently to the screen. (In other words, |
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135 like SDL_DisplayFormat() but the resulting surface has |
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136 an alpha channel.) This is useful for surfaces with alpha. |
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137 SDL_MapRGBA() |
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138 Works as SDL_MapRGB() but takes an additional alpha parameter. |
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139 SDL_GetRGBA() |
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140 Works as SDL_GetRGB() but also returns the alpha value |
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141 (SDL_ALPHA_OPAQUE for formats without an alpha channel) |
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142 |
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143 Both SDL_GetRGB() and SDL_GetRGBA() now always return values in |
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144 the [0..255] interval. Previously, SDL_GetRGB() would return |
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145 (0xf8, 0xfc, 0xf8) for a completely white pixel in RGB565 format. |
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146 (N.B.: This is broken for bit fields < 3 bits.) |
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147 |
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148 SDL_MapRGB() returns pixels in which the alpha channel is set opaque. |
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149 |
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150 SDL_SetAlpha() can now be used for both setting the per-surface |
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151 alpha, using the new way of thinking of alpha, and also to enable |
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152 and disable per-pixel alpha blending for surfaces with an alpha |
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153 channel: |
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154 To disable alpha blending: |
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155 SDL_SetAlpha(surface, 0, 0); |
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156 To re-enable alpha blending: |
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157 SDL_SetAlpha(surface, SDL_SRCALPHA, 0); |
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158 Surfaces with an alpha channel have blending enabled by default. |
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159 |
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160 SDL_SetAlpha() now accepts SDL_RLEACCEL as a flag, which requests |
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161 RLE acceleration of blits, just as like with SDL_SetColorKey(). |
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162 This flag can be set for both surfaces with an alpha channel |
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163 and surfaces with an alpha value set by SDL_SetAlpha(). |
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164 As always, RLE surfaces must be locked before pixel access is |
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165 allowed, and unlocked before any other SDL operations are done |
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166 on it. |
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167 |
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168 The blit semantics for surfaces with and without alpha and colorkey |
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169 have now been defined: |
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170 |
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171 RGBA->RGB: |
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172 SDL_SRCALPHA set: |
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173 alpha-blend (using alpha-channel). |
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174 SDL_SRCCOLORKEY ignored. |
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175 SDL_SRCALPHA not set: |
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176 copy RGB. |
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177 if SDL_SRCCOLORKEY set, only copy the pixels matching the |
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178 RGB values of the source colour key, ignoring alpha in the |
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179 comparison. |
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180 |
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181 RGB->RGBA: |
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182 SDL_SRCALPHA set: |
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183 alpha-blend (using the source per-surface alpha value); |
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184 set destination alpha to opaque. |
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185 SDL_SRCALPHA not set: |
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186 copy RGB, set destination alpha to opaque. |
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187 both: |
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188 if SDL_SRCCOLORKEY set, only copy the pixels matching the |
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189 source colour key. |
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190 |
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191 RGBA->RGBA: |
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192 SDL_SRCALPHA set: |
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193 alpha-blend (using the source alpha channel) the RGB values; |
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194 leave destination alpha untouched. [Note: is this correct?] |
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195 SDL_SRCCOLORKEY ignored. |
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196 SDL_SRCALPHA not set: |
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197 copy all of RGBA to the destination. |
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198 if SDL_SRCCOLORKEY set, only copy the pixels matching the |
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199 RGB values of the source colour key, ignoring alpha in the |
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200 comparison. |
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201 |
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202 RGB->RGB: |
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203 SDL_SRCALPHA set: |
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204 alpha-blend (using the source per-surface alpha value). |
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205 SDL_SRCALPHA not set: |
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206 copy RGB. |
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207 both: |
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208 if SDL_SRCCOLORKEY set, only copy the pixels matching the |
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209 source colour key. |
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210 |
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211 As a special case, blits from surfaces with per-surface alpha |
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212 value of 128 (50% transparency) are optimised and much faster |
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213 than other alpha values. This does not apply to surfaces with |
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214 alpha channels (per-pixel alpha). |
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215 |
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216 New functions for manipulating the gamma of the display have |
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217 been added: |
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218 int SDL_SetGamma(float red, float green, float blue); |
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219 int SDL_SetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue); |
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220 int SDL_GetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue); |
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221 Gamma ramps are tables with 256 entries which map the screen color |
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222 components into actually displayed colors. For an example of |
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223 implementing gamma correction and gamma fades, see test/testgamma.c |
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224 Gamma control is not supported on all hardware. |
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225 |
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226 1.1.4: |
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227 The size of the SDL_CDtrack structure changed from 8 to 12 bytes |
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228 as the size of the length member was extended to 32 bits. |
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229 |
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230 You can now use SDL for 2D blitting with a GL mode by passing the |
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231 SDL_OPENGLBLIT flag to SDL_SetVideoMode(). You can specify 16 or |
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232 32 bpp, and the data in the framebuffer is put into the GL scene |
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233 when you call SDL_UpdateRects(), and the scene will be visible |
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234 when you call SDL_GL_SwapBuffers(). |
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235 |
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236 Run the "testgl" test program with the -logo command line option |
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237 to see an example of this blending of 2D and 3D in SDL. |
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238 |
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239 1.1.3: |
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240 Added SDL_FreeRW() to the API, to complement SDL_AllocRW() |
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241 |
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242 Added resizable window support - just add SDL_RESIZABLE to the |
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243 SDL_SetVideoMode() flags, and then wait for SDL_VIDEORESIZE events. |
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244 See SDL_events.h for details on the new SDL_ResizeEvent structure. |
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245 |
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246 Added condition variable support, based on mutexes and semaphores. |
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247 SDL_CreateCond() |
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248 SDL_DestroyCond() |
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249 SDL_CondSignal() |
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250 SDL_CondBroadcast() |
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251 SDL_CondWait() |
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252 SDL_CondTimedWait() |
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253 The new function prototypes are in SDL_mutex.h |
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254 |
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255 Added counting semaphore support, based on the mutex primitive. |
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256 SDL_CreateSemaphore() |
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257 SDL_DestroySemaphore() |
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258 SDL_SemWait() |
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259 SDL_SemTryWait() |
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260 SDL_SemWaitTimeout() |
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261 SDL_SemPost() |
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262 SDL_SemValue() |
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263 The new function prototypes are in SDL_mutex.h |
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264 |
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265 Added support for asynchronous blitting. To take advantage of this, |
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266 you must set the SDL_ASYNCBLIT flag when setting the video mode and |
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267 creating surfaces that you want accelerated in this way. You must |
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268 lock surfaces that have this flag set, and the lock will block until |
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269 any queued blits have completed. |
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270 |
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271 Added YUV video overlay support. |
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272 The supported YUV formats are: YV12, IYUV, YUY2, UYVY, and YVYU. |
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273 This function creates an overlay surface: |
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274 SDL_CreateYUVOverlay() |
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275 You must lock and unlock the overlay to get access to the data: |
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276 SDL_LockYUVOverlay() SDL_UnlockYUVOverlay() |
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277 You can then display the overlay: |
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278 SDL_DisplayYUVOverlay() |
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279 You must free the overlay when you are done using it: |
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280 SDL_FreeYUVOverlay() |
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281 See SDL_video.h for the full function prototypes. |
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282 |
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283 The joystick hat position constants have been changed: |
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284 Old constant New constant |
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285 ------------ ------------ |
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286 0 SDL_HAT_CENTERED |
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287 1 SDL_HAT_UP |
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288 2 SDL_HAT_RIGHTUP |
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289 3 SDL_HAT_RIGHT |
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290 4 SDL_HAT_RIGHTDOWN |
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291 5 SDL_HAT_DOWN |
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292 6 SDL_HAT_LEFTDOWN |
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293 7 SDL_HAT_LEFT |
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294 8 SDL_HAT_LEFTUP |
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295 The new constants are bitmasks, so you can check for the |
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296 individual axes like this: |
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297 if ( hat_position & SDL_HAT_UP ) { |
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298 } |
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299 and you'll catch left-up, up, and right-up. |
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300 |
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301 1.1.2: |
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302 Added multiple timer support: |
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303 SDL_AddTimer() and SDL_RemoveTimer() |
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304 |
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305 SDL_WM_SetIcon() now respects the icon colorkey if mask is NULL. |
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306 |
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307 1.1.0: |
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308 Added initial OpenGL support. |
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309 First set GL attributes (such as RGB depth, alpha depth, etc.) |
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310 SDL_GL_SetAttribute() |
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311 Then call SDL_SetVideoMode() with the SDL_OPENGL flag. |
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312 Perform all of your normal GL drawing. |
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313 Finally swap the buffers with the new SDL function: |
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314 SDL_GL_SwapBuffers() |
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315 See the new 'testgl' test program for an example of using GL with SDL. |
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316 |
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317 You can load GL extension functions by using the function: |
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318 SDL_GL_LoadProcAddress() |
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319 |
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320 Added functions to initialize and cleanup specific SDL subsystems: |
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321 SDL_InitSubSystem() and SDL_QuitSubSystem() |
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322 |
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323 Added user-defined event type: |
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324 typedef struct { |
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325 Uint8 type; |
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326 int code; |
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327 void *data1; |
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328 void *data2; |
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329 } SDL_UserEvent; |
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330 This structure is in the "user" member of an SDL_Event. |
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331 |
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332 Added a function to push events into the event queue: |
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333 SDL_PushEvent() |
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334 |
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335 Example of using the new SDL user-defined events: |
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336 { |
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337 SDL_Event event; |
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338 |
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339 event.type = SDL_USEREVENT; |
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340 event.user.code = my_event_code; |
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341 event.user.data1 = significant_data; |
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342 event.user.data2 = 0; |
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343 SDL_PushEvent(&event); |
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344 } |
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345 |
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346 Added a function to get mouse deltas since last query: |
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347 SDL_GetRelativeMouseState() |
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348 |
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349 Added a boolean datatype to SDL_types.h: |
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350 SDL_bool = { SDL_TRUE, SDL_FALSE } |
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351 |
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352 Added a function to get the current audio status: |
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353 SDL_GetAudioState(); |
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354 It returns one of: |
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355 SDL_AUDIO_STOPPED, |
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356 SDL_AUDIO_PLAYING, |
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357 SDL_AUDIO_PAUSED |
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358 |
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359 Added an AAlib driver (ASCII Art) - by Stephane Peter. |
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360 |
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361 1.0.6: |
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362 The input grab state is reset after each call to SDL_SetVideoMode(). |
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363 The input is grabbed by default in fullscreen mode, and ungrabbed in |
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364 windowed mode. If you want to set input grab to a particular value, |
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365 you should set it after each call to SDL_SetVideoMode(). |
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366 |
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367 1.0.5: |
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368 Exposed SDL_AudioInit(), SDL_VideoInit() |
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369 Added SDL_AudioDriverName() and SDL_VideoDriverName() |
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370 |
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371 Added new window manager function: |
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372 SDL_WM_ToggleFullScreen() |
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373 This is currently implemented only on Linux |
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374 |
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375 The ALT-ENTER code has been removed - it's not appropriate for a |
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376 lib to bind keys when they aren't even emergency escape sequences. |
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377 |
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378 ALT-ENTER functionality can be implemented with the following code: |
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379 |
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380 int Handle_AltEnter(const SDL_Event *event) |
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381 { |
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382 if ( event->type == SDL_KEYDOWN ) { |
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383 if ( (event->key.keysym.sym == SDLK_RETURN) && |
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384 (event->key.keysym.mod & KMOD_ALT) ) { |
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385 SDL_WM_ToggleFullScreen(SDL_GetVideoSurface()); |
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386 return(0); |
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387 } |
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388 } |
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389 return(1); |
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390 } |
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391 SDL_SetEventFilter(Handle_AltEnter); |
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392 |
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393 1.0.3: |
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394 Under X11, if you grab the input and hide the mouse cursor, |
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395 the mouse will go into a "relative motion" mode where you |
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396 will always get relative motion events no matter how far in |
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397 each direction you move the mouse - relative motion is not |
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398 bounded by the edges of the window (though the absolute values |
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399 of the mouse positions are clamped by the size of the window). |
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400 The SVGAlib, framebuffer console, and DirectInput drivers all |
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401 have this behavior naturally, and the GDI and BWindow drivers |
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402 never go into "relative motion" mode. |
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403 |
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404 1.0.2: |
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405 Added a function to enable keyboard repeat: |
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406 SDL_EnableKeyRepeat() |
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407 |
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408 Added a function to grab the mouse and keyboard input |
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409 SDL_WM_GrabInput() |
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410 |
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411 Added a function to iconify the window. |
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412 SDL_WM_IconifyWindow() |
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413 If this function succeeds, the application will receive an event |
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414 signaling SDL_APPACTIVE event |
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415 |
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416 1.0.1: |
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417 Added constants to SDL_audio.h for 16-bit native byte ordering: |
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418 AUDIO_U16SYS, AUDIO_S16SYS |
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419 |
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420 1.0.0: |
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421 New public release |
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422 |
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423 0.11.5: |
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424 A new function SDL_GetVideoSurface() has been added, and returns |
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425 a pointer to the current display surface. |
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426 |
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427 SDL_AllocSurface() has been renamed SDL_CreateRGBSurface(), and |
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428 a new function SDL_CreateRGBSurfaceFrom() has been added to allow |
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429 creating an SDL surface from an existing pixel data buffer. |
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430 |
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431 Added SDL_GetRGB() to the headers and documentation. |
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432 |
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433 0.11.4: |
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434 SDL_SetLibraryPath() is no longer meaningful, and has been removed. |
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435 |
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436 0.11.3: |
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437 A new flag for SDL_Init(), SDL_INIT_NOPARACHUTE, prevents SDL from |
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438 installing fatal signal handlers on operating systems that support |
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439 them. |
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440 |
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441 0.9.15: |
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442 SDL_CreateColorCursor() has been removed. Color cursors should |
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443 be implemented as sprites, blitted by the application when the |
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444 cursor moves. To get smooth color cursor updates when the app |
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445 is busy, pass the SDL_INIT_EVENTTHREAD flag to SDL_Init(). This |
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446 allows you to handle the mouse motion in another thread from an |
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447 event filter function, but is currently only supported by Linux |
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448 and BeOS. Note that you'll have to protect the display surface |
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449 from multi-threaded access by using mutexes if you do this. |
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450 |
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451 Thread-safe surface support has been removed from SDL. |
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452 This makes blitting somewhat faster, by removing SDL_MiddleBlit(). |
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453 Code that used SDL_MiddleBlit() should use SDL_LowerBlit() instead. |
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454 You can make your surfaces thread-safe by allocating your own |
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455 mutex and making lock/unlock calls around accesses to your surface. |
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456 |
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457 0.9.14: |
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458 SDL_GetMouseState() now takes pointers to int rather than Uint16. |
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459 |
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460 If you set the SDL_WINDOWID environment variable under UNIX X11, |
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461 SDL will use that as the main window instead of creating it's own. |
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462 This is an unsupported extension to SDL, and not portable at all. |
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463 |
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464 0.9.13: |
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465 Added a function SDL_SetLibraryPath() which can be used to specify |
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466 the directory containing the SDL dynamic libraries. This is useful |
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467 for commercial applications which ship with particular versions |
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468 of the libraries, and for security on multi-user systems. |
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469 If this function is not used, the default system directories are |
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470 searched using the native dynamic object loading mechanism. |
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471 |
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472 In order to support C linkage under Visual C++, you must declare |
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473 main() without any return type: |
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474 main(int argc, char *argv[]) { |
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475 /* Do the program... */ |
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476 return(0); |
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477 } |
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478 C++ programs should also return a value if compiled under VC++. |
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479 |
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480 The blit_endian member of the SDL_VideoInfo struct has been removed. |
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481 |
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482 SDL_SymToASCII() has been replaced with SDL_GetKeyName(), so there |
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483 is now no longer any function to translate a keysym to a character. |
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484 |
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485 The SDL_keysym structure has been extended with a 'scancode' and |
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486 'unicode' member. The 'scancode' is a hardware specific scancode |
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487 for the key that was pressed, and may be 0. The 'unicode' member |
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488 is a 16-bit UNICODE translation of the key that was pressed along |
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489 with any modifiers or compose keys that have been pressed. |
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490 If no UNICODE translation exists for the key, 'unicode' will be 0. |
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491 |
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492 Added a function SDL_EnableUNICODE() to enable/disable UNICODE |
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493 translation of character keypresses. Translation defaults off. |
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494 |
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495 To convert existing code to use the new API, change code which |
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496 uses SDL_SymToASCII() to get the keyname to use SDL_GetKeyName(), |
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497 and change code which uses it to get the ASCII value of a sym to |
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498 use the 'unicode' member of the event keysym. |
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499 |
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500 0.9.12: |
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501 There is partial support for 64-bit datatypes. I don't recommend |
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502 you use this if you have a choice, because 64-bit datatypes are not |
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503 supported on many platforms. On platforms for which it is supported, |
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504 the SDL_HAS_64BIT_TYPE C preprocessor define will be enabled, and |
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505 you can use the Uint64 and Sint64 datatypes. |
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506 |
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507 Added functions to SDL_endian.h to support 64-bit datatypes: |
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508 SDL_SwapLE64(), SDL_SwapBE64(), |
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509 SDL_ReadLE64(), SDL_ReadBE64(), SDL_WriteLE64(), SDL_WriteBE64() |
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510 |
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511 A new member "len_ratio" has been added to the SDL_AudioCVT structure, |
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512 and allows you to determine either the original buffer length or the |
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513 converted buffer length, given the other. |
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514 |
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515 A new function SDL_FreeWAV() has been added to the API to free data |
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516 allocated by SDL_LoadWAV_RW(). This is necessary under Win32 since |
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517 the gcc compiled DLL uses a different heap than VC++ compiled apps. |
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518 |
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519 SDL now has initial support for international keyboards using the |
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520 Latin character set. |
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521 If a particular mapping is desired, you can set the DEFAULT_KEYBOARD |
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522 compile-time variable, or you can set the environment variable |
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523 "SDL_KEYBOARD" to a string identifying the keyboard mapping you desire. |
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524 The valid values for these variables can be found in SDL_keyboard.c |
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525 |
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526 Full support for German and French keyboards under X11 is implemented. |
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527 |
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528 0.9.11: |
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529 The THREADED_EVENTS compile-time define has been replaced with the |
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530 SDL_INIT_EVENTTHREAD flag. If this flag is passed to SDL_Init(), |
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531 SDL will create a separate thread to perform input event handling. |
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532 If this flag is passed to SDL_Init(), and the OS doesn't support |
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533 event handling in a separate thread, SDL_Init() will fail. |
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534 Be sure to add calls to SDL_Delay() in your main thread to allow |
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535 the OS to schedule your event thread, or it may starve, leading |
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536 to slow event delivery and/or dropped events. |
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537 Currently MacOS and Win32 do not support this flag, while BeOS |
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538 and Linux do support it. I recommend that your application only |
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539 use this flag if absolutely necessary. |
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540 |
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541 The SDL thread function passed to SDL_CreateThread() now returns a |
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542 status. This status can be retrieved by passing a non-NULL pointer |
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543 as the 'status' argument to SDL_WaitThread(). |
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544 |
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545 The volume parameter to SDL_MixAudio() has been increased in range |
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546 from (0-8) to (0-128) |
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547 |
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548 SDL now has a data source abstraction which can encompass a file, |
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549 an area of memory, or any custom object you can envision. It uses |
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550 these abstractions, SDL_RWops, in the endian read/write functions, |
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551 and the built-in WAV and BMP file loaders. This means you can load |
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552 WAV chunks from memory mapped files, compressed archives, network |
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553 pipes, or anything else that has a data read abstraction. |
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554 |
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555 There are three built-in data source abstractions: |
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556 SDL_RWFromFile(), SDL_RWFromFP(), SDL_RWFromMem() |
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557 along with a generic data source allocation function: |
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558 SDL_AllocRW() |
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559 These data sources can be used like stdio file pointers with the |
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560 following convenience functions: |
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561 SDL_RWseek(), SDL_RWread(), SDL_RWwrite(), SDL_RWclose() |
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562 These functions are defined in the new header file "SDL_rwops.h" |
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563 |
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564 The endian swapping functions have been turned into macros for speed |
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565 and SDL_CalculateEndian() has been removed. SDL_endian.h now defines |
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566 SDL_BYTEORDER as either SDL_BIG_ENDIAN or SDL_LIL_ENDIAN depending on |
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567 the endianness of the host system. |
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568 |
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569 The endian read/write functions now take an SDL_RWops pointer |
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570 instead of a stdio FILE pointer, to support the new data source |
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571 abstraction. |
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572 |
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573 The SDL_*LoadWAV() functions have been replaced with a single |
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574 SDL_LoadWAV_RW() function that takes a SDL_RWops pointer as it's |
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575 first parameter, and a flag whether or not to automatically |
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576 free it as the second parameter. SDL_LoadWAV() is a macro for |
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577 backward compatibility and convenience: |
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578 SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...); |
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579 |
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580 The SDL_*LoadBMP()/SDL_*SaveBMP() functions have each been replaced |
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581 with a single function that takes a SDL_RWops pointer as it's |
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582 first parameter, and a flag whether or not to automatically |
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583 free it as the second parameter. SDL_LoadBMP() and SDL_SaveBMP() |
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584 are macros for backward compatibility and convenience: |
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585 SDL_LoadBMP_RW(SDL_RWFromFile("sample.bmp", "rb"), 1, ...); |
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586 SDL_SaveBMP_RW(SDL_RWFromFile("sample.bmp", "wb"), 1, ...); |
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587 Note that these functions use SDL_RWseek() extensively, and should |
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588 not be used on pipes or other non-seekable data sources. |
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589 |
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590 0.9.10: |
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591 The Linux SDL_SysWMInfo and SDL_SysWMMsg structures have been |
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592 extended to support multiple types of display drivers, as well as |
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593 safe access to the X11 display when THREADED_EVENTS is enabled. |
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594 The new structures are documented in the SDL_syswm.h header file. |
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595 |
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596 Thanks to John Elliott <jce@seasip.demon.co.uk>, the UK keyboard |
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597 should now work properly, as well as the "Windows" keys on US |
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598 keyboards. |
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599 |
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600 The Linux CD-ROM code now reads the CD-ROM devices from /etc/fstab |
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601 instead of trying to open each block device on the system. |
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602 The CD must be listed in /etc/fstab as using the iso9660 filesystem. |
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603 |
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604 On Linux, if you define THREADED_EVENTS at compile time, a separate |
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605 thread will be spawned to gather X events asynchronously from the |
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606 graphics updates. This hasn't been extensively tested, but it does |
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607 provide a means of handling keyboard and mouse input in a separate |
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608 thread from the graphics thread. (This is now enabled by default.) |
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609 |
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610 A special access function SDL_PeepEvents() allows you to manipulate |
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611 the event queue in a thread-safe manner, including peeking at events, |
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612 removing events of a specified type, and adding new events of arbitrary |
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613 type to the queue (use the new 'user' member of the SDL_Event type). |
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614 |
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615 If you use SDL_PeepEvents() to gather events, then the main graphics |
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616 thread needs to call SDL_PumpEvents() periodically to drive the event |
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617 loop and generate input events. This is not necessary if SDL has been |
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618 compiled with THREADED_EVENTS defined, but doesn't hurt. |
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619 |
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620 A new function SDL_ThreadID() returns the identifier associated with |
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621 the current thread. |
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622 |
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623 0.9.9: |
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624 The AUDIO_STEREO format flag has been replaced with a new 'channels' |
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625 member of the SDL_AudioSpec structure. The channels are 1 for mono |
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626 audio, and 2 for stereo audio. In the future more channels may be |
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627 supported for 3D surround sound. |
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628 |
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629 The SDL_MixAudio() function now takes an additional volume parameter, |
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630 which should be set to SDL_MIX_MAXVOLUME for compatibility with the |
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631 original function. |
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632 |
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633 The CD-ROM functions which take a 'cdrom' parameter can now be |
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634 passed NULL, and will act on the last successfully opened CD-ROM. |
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635 |
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636 0.9.8: |
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637 No changes, bugfixes only. |
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638 |
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639 0.9.7: |
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640 No changes, bugfixes only. |
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641 |
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642 0.9.6: |
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643 Added a fast rectangle fill function: SDL_FillRect() |
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644 |
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645 Addition of a useful function for getting info on the video hardware: |
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646 const SDL_VideoInfo *SDL_GetVideoInfo(void) |
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647 This function replaces SDL_GetDisplayFormat(). |
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648 |
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649 Initial support for double-buffering: |
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650 Use the SDL_DOUBLEBUF flag in SDL_SetVideoMode() |
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651 Update the screen with a new function: SDL_Flip() |
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652 |
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653 SDL_AllocSurface() takes two new flags: |
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654 SDL_SRCCOLORKEY means that the surface will be used for colorkey blits |
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655 and if the hardware supports hardware acceleration of colorkey blits |
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656 between two surfaces in video memory, to place the surface in video |
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657 memory if possible, otherwise it will be placed in system memory. |
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658 SDL_SRCALPHA means that the surface will be used for alpha blits and |
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659 if the hardware supports hardware acceleration of alpha blits between |
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660 two surfaces in video memory, to place the surface in video memory |
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661 if possible, otherwise it will be placed in system memory. |
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662 SDL_HWSURFACE now means that the surface will be created with the |
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663 same format as the display surface, since having surfaces in video |
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664 memory is only useful for fast blitting to the screen, and you can't |
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665 blit surfaces with different surface formats in video memory. |
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666 |
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667 0.9.5: |
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668 You can now pass a NULL mask to SDL_WM_SetIcon(), and it will assume |
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669 that the icon consists of the entire image. |
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670 |
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671 SDL_LowerBlit() is back -- but don't use it on the display surface. |
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672 It is exactly the same as SDL_MiddleBlit(), but doesn't check for |
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673 thread safety. |
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674 |
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675 Added SDL_FPLoadBMP(), SDL_FPSaveBMP(), SDL_FPLoadWAV(), which take |
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676 a FILE pointer instead of a file name. |
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677 |
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678 Added CD-ROM audio control API: |
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679 SDL_CDNumDrives() |
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680 SDL_CDName() |
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681 SDL_CDOpen() |
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682 SDL_CDStatus() |
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683 SDL_CDPlayTracks() |
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684 SDL_CDPlay() |
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685 SDL_CDPause() |
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686 SDL_CDResume() |
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687 SDL_CDStop() |
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688 SDL_CDEject() |
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689 SDL_CDClose() |
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690 |
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691 0.9.4: |
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692 No changes, bugfixes only. |
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693 |
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694 0.9.3: |
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695 Mouse motion event now includes relative motion information: |
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696 Sint16 event->motion.xrel, Sint16 event->motion.yrel |
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697 |
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698 X11 keyrepeat handling can be disabled by defining IGNORE_X_KEYREPEAT |
|
699 (Add -DIGNORE_X_KEYREPEAT to CFLAGS line in obj/x11Makefile) |
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700 |
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701 0.9.2: |
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702 No changes, bugfixes only. |
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703 |
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704 0.9.1: |
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705 Removed SDL_MapSurface() and SDL_UnmapSurface() -- surfaces are now |
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706 automatically mapped on blit. |
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707 |
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708 0.8.0: |
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709 SDL stable release |
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