annotate WhatsNew @ 294:d2d48e10f370

Added a new header file: SDL_loadso.h It contains the following functions: SDL_LoadObject(), SDL_LoadFunction(), SDL_UnloadObject() The UNIX esd and arts audio code use these to dynamically load their respective audio libraries.
author Sam Lantinga <slouken@libsdl.org>
date Wed, 06 Mar 2002 05:20:11 +0000
parents eadc0746dfaf
children fab1ddc4d7bf
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1
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2 This is a list of API changes in SDL's version history.
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3
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4 Version 1.0:
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5
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6 1.2.4:
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7 Added a new header file: SDL_loadso.h
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8 It contains the following functions:
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9 SDL_LoadObject(), SDL_LoadFunction(), SDL_UnloadObject()
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10 The UNIX esd and arts audio code use these to dynamically load
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11 their respective audio libraries.
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12
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13 Added SDL_LockRect() and SDL_UnlockRect() to lock a portion of a
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14 surface. This may be more efficient than a full lock if you are
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15 using a hardware surface and plan to make a few changes to small
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16 areas in the surface.
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17
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18 1.2.0:
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19 Added SDL_VIDEOEXPOSE event to signal that the screen needs to
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20 be redrawn. This is currently only delivered to OpenGL windows
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21 on X11, though it may be delivered in the future when the video
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22 memory is lost under DirectX.
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23
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24 1.1.8:
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25 You can pass SDL_NOFRAME to SDL_VideoMode() to create a window
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26 that has no title bar or frame decoration. Fullscreen video
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27 modes automatically have this flag set.
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28
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29 Added a function to query the clipping rectangle for a surface:
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30 void SDL_GetClipRect(SDL_Surface *surface, SDL_Rect *rect)
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31
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32 Added a function to query the current event filter:
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33 SDL_EventFilter SDL_GetEventFilter(void)
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34
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35 If you pass -1 to SDL_ShowCursor(), it won't change the current
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36 cursor visibility state, but will still return it.
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37
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38 SDL_LockSurface() and SDL_UnlockSurface() are recursive, meaning
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39 you can nest them as deep as you want, as long as each lock call
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40 has a matching unlock call. The surface remains locked until the
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41 last matching unlock call.
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42
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43 Note that you may not blit to or from a locked surface.
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44
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45 1.1.7:
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46 The SDL_SetGammaRamp() and SDL_GetGammaRamp() functions now take
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47 arrays of Uint16 values instead of Uint8 values. For the most part,
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48 you can just take your old values and shift them up 8 bits to get
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49 new correct values for your gamma ramps.
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50
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51 You can pass SDL_RLEACCEL in flags passed to SDL_ConvertSurface()
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52 and SDL will try to RLE accelerate colorkey and alpha blits in the
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53 resulting surface.
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54
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55 1.1.6:
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56 Added a function to return the thread ID of a specific thread:
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57 Uint32 SDL_GetThreadID(SDL_Thread *thread)
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58 If 'thread' is NULL, this function returns the id for this thread.
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59
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60 1.1.5:
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61 The YUV overlay structure has been changed to use an array of
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62 pitches and pixels representing the planes of a YUV image, to
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63 better enable hardware acceleration. The YV12 and IYUV formats
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64 each have three planes, corresponding to the Y, U, and V portions
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65 of the image, while packed pixel YUV formats just have one plane.
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66
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67 For palettized mode (8bpp), the screen colormap is now split in
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68 a physical and a logical palette. The physical palette determines
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69 what colours the screen pixels will get when displayed, and the
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70 logical palette controls the mapping from blits to/from the screen.
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71 A new function, SDL_SetPalette() has been added to change
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72 logical and physical palettes separately. SDL_SetColors() works
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73 just as before, and is equivalent to calling SDL_SetPalette() with
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74 a flag argument of (SDL_LOGPAL|SDL_PHYSPAL).
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75
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76 SDL_BlitSurface() no longer modifies the source rectangle, only the
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77 destination rectangle. The width/height members of the destination
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78 rectangle are ignored, only the position is used.
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79
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80 The old source clipping function SDL_SetClipping() has been replaced
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81 with a more useful function to set the destination clipping rectangle:
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82 SDL_bool SDL_SetClipRect(SDL_Surface *surface, SDL_Rect *rect)
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83
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84 Added a function to see what subsystems have been initialized:
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85 Uint32 SDL_WasInit(Uint32 flags)
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86
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87 The Big Alpha Flip: SDL now treats alpha as opacity like everybody
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88 else, and not as transparency:
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89
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90 A new cpp symbol: SDL_ALPHA_OPAQUE is defined as 255
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91 A new cpp symbol: SDL_ALPHA_TRANSPARENT is defined as 0
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92 Values between 0 and 255 vary from fully transparent to fully opaque.
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93
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94 New functions:
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95 SDL_DisplayFormatAlpha()
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96 Returns a surface converted to a format with alpha-channel
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97 that can be blit efficiently to the screen. (In other words,
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98 like SDL_DisplayFormat() but the resulting surface has
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99 an alpha channel.) This is useful for surfaces with alpha.
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100 SDL_MapRGBA()
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101 Works as SDL_MapRGB() but takes an additional alpha parameter.
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102 SDL_GetRGBA()
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103 Works as SDL_GetRGB() but also returns the alpha value
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104 (SDL_ALPHA_OPAQUE for formats without an alpha channel)
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105
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106 Both SDL_GetRGB() and SDL_GetRGBA() now always return values in
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107 the [0..255] interval. Previously, SDL_GetRGB() would return
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108 (0xf8, 0xfc, 0xf8) for a completely white pixel in RGB565 format.
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109 (N.B.: This is broken for bit fields < 3 bits.)
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110
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111 SDL_MapRGB() returns pixels in which the alpha channel is set opaque.
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112
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113 SDL_SetAlpha() can now be used for both setting the per-surface
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114 alpha, using the new way of thinking of alpha, and also to enable
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115 and disable per-pixel alpha blending for surfaces with an alpha
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116 channel:
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117 To disable alpha blending:
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118 SDL_SetAlpha(surface, 0, 0);
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119 To re-enable alpha blending:
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120 SDL_SetAlpha(surface, SDL_SRCALPHA, 0);
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121 Surfaces with an alpha channel have blending enabled by default.
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122
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123 SDL_SetAlpha() now accepts SDL_RLEACCEL as a flag, which requests
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124 RLE acceleration of blits, just as like with SDL_SetColorKey().
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125 This flag can be set for both surfaces with an alpha channel
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126 and surfaces with an alpha value set by SDL_SetAlpha().
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127 As always, RLE surfaces must be locked before pixel access is
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128 allowed, and unlocked before any other SDL operations are done
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129 on it.
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130
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131 The blit semantics for surfaces with and without alpha and colorkey
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132 have now been defined:
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133
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134 RGBA->RGB:
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135 SDL_SRCALPHA set:
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136 alpha-blend (using alpha-channel).
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137 SDL_SRCCOLORKEY ignored.
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138 SDL_SRCALPHA not set:
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139 copy RGB.
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140 if SDL_SRCCOLORKEY set, only copy the pixels matching the
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141 RGB values of the source colour key, ignoring alpha in the
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142 comparison.
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143
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144 RGB->RGBA:
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145 SDL_SRCALPHA set:
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146 alpha-blend (using the source per-surface alpha value);
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147 set destination alpha to opaque.
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148 SDL_SRCALPHA not set:
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149 copy RGB, set destination alpha to opaque.
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150 both:
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151 if SDL_SRCCOLORKEY set, only copy the pixels matching the
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152 source colour key.
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153
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154 RGBA->RGBA:
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155 SDL_SRCALPHA set:
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156 alpha-blend (using the source alpha channel) the RGB values;
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157 leave destination alpha untouched. [Note: is this correct?]
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158 SDL_SRCCOLORKEY ignored.
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159 SDL_SRCALPHA not set:
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160 copy all of RGBA to the destination.
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161 if SDL_SRCCOLORKEY set, only copy the pixels matching the
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162 RGB values of the source colour key, ignoring alpha in the
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163 comparison.
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164
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165 RGB->RGB:
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166 SDL_SRCALPHA set:
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167 alpha-blend (using the source per-surface alpha value).
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168 SDL_SRCALPHA not set:
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169 copy RGB.
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170 both:
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171 if SDL_SRCCOLORKEY set, only copy the pixels matching the
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172 source colour key.
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173
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174 As a special case, blits from surfaces with per-surface alpha
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175 value of 128 (50% transparency) are optimised and much faster
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176 than other alpha values. This does not apply to surfaces with
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177 alpha channels (per-pixel alpha).
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178
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179 New functions for manipulating the gamma of the display have
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180 been added:
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181 int SDL_SetGamma(float red, float green, float blue);
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182 int SDL_SetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
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183 int SDL_GetGammaRamp(Uint8 *red, Uint8 *green, Uint8 *blue);
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184 Gamma ramps are tables with 256 entries which map the screen color
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185 components into actually displayed colors. For an example of
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186 implementing gamma correction and gamma fades, see test/testgamma.c
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187 Gamma control is not supported on all hardware.
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188
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189 1.1.4:
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190 The size of the SDL_CDtrack structure changed from 8 to 12 bytes
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191 as the size of the length member was extended to 32 bits.
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192
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193 You can now use SDL for 2D blitting with a GL mode by passing the
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194 SDL_OPENGLBLIT flag to SDL_SetVideoMode(). You can specify 16 or
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195 32 bpp, and the data in the framebuffer is put into the GL scene
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196 when you call SDL_UpdateRects(), and the scene will be visible
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197 when you call SDL_GL_SwapBuffers().
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198
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199 Run the "testgl" test program with the -logo command line option
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200 to see an example of this blending of 2D and 3D in SDL.
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201
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202 1.1.3:
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203 Added SDL_FreeRW() to the API, to complement SDL_AllocRW()
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204
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205 Added resizable window support - just add SDL_RESIZABLE to the
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206 SDL_SetVideoMode() flags, and then wait for SDL_VIDEORESIZE events.
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207 See SDL_events.h for details on the new SDL_ResizeEvent structure.
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208
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209 Added condition variable support, based on mutexes and semaphores.
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210 SDL_CreateCond()
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211 SDL_DestroyCond()
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212 SDL_CondSignal()
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213 SDL_CondBroadcast()
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214 SDL_CondWait()
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215 SDL_CondTimedWait()
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216 The new function prototypes are in SDL_mutex.h
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217
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218 Added counting semaphore support, based on the mutex primitive.
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219 SDL_CreateSemaphore()
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220 SDL_DestroySemaphore()
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221 SDL_SemWait()
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222 SDL_SemTryWait()
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223 SDL_SemWaitTimeout()
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224 SDL_SemPost()
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225 SDL_SemValue()
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226 The new function prototypes are in SDL_mutex.h
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227
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228 Added support for asynchronous blitting. To take advantage of this,
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229 you must set the SDL_ASYNCBLIT flag when setting the video mode and
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230 creating surfaces that you want accelerated in this way. You must
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231 lock surfaces that have this flag set, and the lock will block until
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232 any queued blits have completed.
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233
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234 Added YUV video overlay support.
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235 The supported YUV formats are: YV12, IYUV, YUY2, UYVY, and YVYU.
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236 This function creates an overlay surface:
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237 SDL_CreateYUVOverlay()
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238 You must lock and unlock the overlay to get access to the data:
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239 SDL_LockYUVOverlay() SDL_UnlockYUVOverlay()
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240 You can then display the overlay:
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241 SDL_DisplayYUVOverlay()
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242 You must free the overlay when you are done using it:
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243 SDL_FreeYUVOverlay()
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244 See SDL_video.h for the full function prototypes.
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245
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246 The joystick hat position constants have been changed:
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247 Old constant New constant
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248 ------------ ------------
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249 0 SDL_HAT_CENTERED
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250 1 SDL_HAT_UP
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251 2 SDL_HAT_RIGHTUP
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252 3 SDL_HAT_RIGHT
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253 4 SDL_HAT_RIGHTDOWN
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254 5 SDL_HAT_DOWN
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255 6 SDL_HAT_LEFTDOWN
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256 7 SDL_HAT_LEFT
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257 8 SDL_HAT_LEFTUP
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258 The new constants are bitmasks, so you can check for the
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259 individual axes like this:
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260 if ( hat_position & SDL_HAT_UP ) {
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261 }
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262 and you'll catch left-up, up, and right-up.
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263
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264 1.1.2:
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265 Added multiple timer support:
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266 SDL_AddTimer() and SDL_RemoveTimer()
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267
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268 SDL_WM_SetIcon() now respects the icon colorkey if mask is NULL.
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269
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270 1.1.0:
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271 Added initial OpenGL support.
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272 First set GL attributes (such as RGB depth, alpha depth, etc.)
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273 SDL_GL_SetAttribute()
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274 Then call SDL_SetVideoMode() with the SDL_OPENGL flag.
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275 Perform all of your normal GL drawing.
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276 Finally swap the buffers with the new SDL function:
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277 SDL_GL_SwapBuffers()
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278 See the new 'testgl' test program for an example of using GL with SDL.
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279
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280 You can load GL extension functions by using the function:
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281 SDL_GL_LoadProcAddress()
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282
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283 Added functions to initialize and cleanup specific SDL subsystems:
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284 SDL_InitSubSystem() and SDL_QuitSubSystem()
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285
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286 Added user-defined event type:
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287 typedef struct {
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288 Uint8 type;
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289 int code;
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290 void *data1;
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291 void *data2;
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292 } SDL_UserEvent;
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293 This structure is in the "user" member of an SDL_Event.
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294
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295 Added a function to push events into the event queue:
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296 SDL_PushEvent()
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297
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298 Example of using the new SDL user-defined events:
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299 {
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300 SDL_Event event;
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301
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302 event.type = SDL_USEREVENT;
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303 event.user.code = my_event_code;
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304 event.user.data1 = significant_data;
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305 event.user.data2 = 0;
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306 SDL_PushEvent(&event);
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307 }
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308
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309 Added a function to get mouse deltas since last query:
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310 SDL_GetRelativeMouseState()
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311
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312 Added a boolean datatype to SDL_types.h:
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313 SDL_bool = { SDL_TRUE, SDL_FALSE }
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314
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315 Added a function to get the current audio status:
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316 SDL_GetAudioState();
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317 It returns one of:
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318 SDL_AUDIO_STOPPED,
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319 SDL_AUDIO_PLAYING,
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320 SDL_AUDIO_PAUSED
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321
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322 Added an AAlib driver (ASCII Art) - by Stephane Peter.
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323
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324 1.0.6:
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325 The input grab state is reset after each call to SDL_SetVideoMode().
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326 The input is grabbed by default in fullscreen mode, and ungrabbed in
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327 windowed mode. If you want to set input grab to a particular value,
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328 you should set it after each call to SDL_SetVideoMode().
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329
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330 1.0.5:
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331 Exposed SDL_AudioInit(), SDL_VideoInit()
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332 Added SDL_AudioDriverName() and SDL_VideoDriverName()
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333
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334 Added new window manager function:
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335 SDL_WM_ToggleFullScreen()
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336 This is currently implemented only on Linux
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337
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338 The ALT-ENTER code has been removed - it's not appropriate for a
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339 lib to bind keys when they aren't even emergency escape sequences.
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340
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341 ALT-ENTER functionality can be implemented with the following code:
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342
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343 int Handle_AltEnter(const SDL_Event *event)
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344 {
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345 if ( event->type == SDL_KEYDOWN ) {
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346 if ( (event->key.keysym.sym == SDLK_RETURN) &&
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347 (event->key.keysym.mod & KMOD_ALT) ) {
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348 SDL_WM_ToggleFullScreen(SDL_GetVideoSurface());
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349 return(0);
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350 }
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351 }
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352 return(1);
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353 }
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354 SDL_SetEventFilter(Handle_AltEnter);
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355
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356 1.0.3:
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357 Under X11, if you grab the input and hide the mouse cursor,
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358 the mouse will go into a "relative motion" mode where you
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359 will always get relative motion events no matter how far in
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360 each direction you move the mouse - relative motion is not
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361 bounded by the edges of the window (though the absolute values
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362 of the mouse positions are clamped by the size of the window).
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363 The SVGAlib, framebuffer console, and DirectInput drivers all
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364 have this behavior naturally, and the GDI and BWindow drivers
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365 never go into "relative motion" mode.
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366
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367 1.0.2:
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368 Added a function to enable keyboard repeat:
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369 SDL_EnableKeyRepeat()
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370
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371 Added a function to grab the mouse and keyboard input
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372 SDL_WM_GrabInput()
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373
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374 Added a function to iconify the window.
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375 SDL_WM_IconifyWindow()
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376 If this function succeeds, the application will receive an event
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377 signaling SDL_APPACTIVE event
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378
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379 1.0.1:
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380 Added constants to SDL_audio.h for 16-bit native byte ordering:
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381 AUDIO_U16SYS, AUDIO_S16SYS
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382
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383 1.0.0:
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384 New public release
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385
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386 Version 0.11:
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387
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388 0.11.5:
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389 A new function SDL_GetVideoSurface() has been added, and returns
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390 a pointer to the current display surface.
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391
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392 SDL_AllocSurface() has been renamed SDL_CreateRGBSurface(), and
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393 a new function SDL_CreateRGBSurfaceFrom() has been added to allow
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394 creating an SDL surface from an existing pixel data buffer.
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395
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396 Added SDL_GetRGB() to the headers and documentation.
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397
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398 0.11.4:
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399 SDL_SetLibraryPath() is no longer meaningful, and has been removed.
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400
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401 0.11.3:
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402 A new flag for SDL_Init(), SDL_INIT_NOPARACHUTE, prevents SDL from
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403 installing fatal signal handlers on operating systems that support
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404 them.
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405
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406 Version 0.9:
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407
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408 0.9.15:
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409 SDL_CreateColorCursor() has been removed. Color cursors should
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410 be implemented as sprites, blitted by the application when the
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411 cursor moves. To get smooth color cursor updates when the app
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412 is busy, pass the SDL_INIT_EVENTTHREAD flag to SDL_Init(). This
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413 allows you to handle the mouse motion in another thread from an
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414 event filter function, but is currently only supported by Linux
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415 and BeOS. Note that you'll have to protect the display surface
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416 from multi-threaded access by using mutexes if you do this.
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417
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418 Thread-safe surface support has been removed from SDL.
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419 This makes blitting somewhat faster, by removing SDL_MiddleBlit().
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420 Code that used SDL_MiddleBlit() should use SDL_LowerBlit() instead.
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421 You can make your surfaces thread-safe by allocating your own
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422 mutex and making lock/unlock calls around accesses to your surface.
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423
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424 0.9.14:
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425 SDL_GetMouseState() now takes pointers to int rather than Uint16.
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426
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427 If you set the SDL_WINDOWID environment variable under UNIX X11,
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428 SDL will use that as the main window instead of creating it's own.
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429 This is an unsupported extension to SDL, and not portable at all.
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430
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431 0.9.13:
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432 Added a function SDL_SetLibraryPath() which can be used to specify
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433 the directory containing the SDL dynamic libraries. This is useful
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diff changeset
434 for commercial applications which ship with particular versions
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diff changeset
435 of the libraries, and for security on multi-user systems.
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diff changeset
436 If this function is not used, the default system directories are
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diff changeset
437 searched using the native dynamic object loading mechanism.
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438
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439 In order to support C linkage under Visual C++, you must declare
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440 main() without any return type:
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441 main(int argc, char *argv[]) {
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442 /* Do the program... */
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443 return(0);
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444 }
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445 C++ programs should also return a value if compiled under VC++.
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446
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447 The blit_endian member of the SDL_VideoInfo struct has been removed.
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448
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449 SDL_SymToASCII() has been replaced with SDL_GetKeyName(), so there
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450 is now no longer any function to translate a keysym to a character.
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451
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452 The SDL_keysym structure has been extended with a 'scancode' and
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diff changeset
453 'unicode' member. The 'scancode' is a hardware specific scancode
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454 for the key that was pressed, and may be 0. The 'unicode' member
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diff changeset
455 is a 16-bit UNICODE translation of the key that was pressed along
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diff changeset
456 with any modifiers or compose keys that have been pressed.
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diff changeset
457 If no UNICODE translation exists for the key, 'unicode' will be 0.
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diff changeset
458
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459 Added a function SDL_EnableUNICODE() to enable/disable UNICODE
74212992fb08 Initial revision
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diff changeset
460 translation of character keypresses. Translation defaults off.
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diff changeset
461
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462 To convert existing code to use the new API, change code which
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diff changeset
463 uses SDL_SymToASCII() to get the keyname to use SDL_GetKeyName(),
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464 and change code which uses it to get the ASCII value of a sym to
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diff changeset
465 use the 'unicode' member of the event keysym.
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466
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467 0.9.12:
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468 There is partial support for 64-bit datatypes. I don't recommend
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diff changeset
469 you use this if you have a choice, because 64-bit datatypes are not
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470 supported on many platforms. On platforms for which it is supported,
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471 the SDL_HAS_64BIT_TYPE C preprocessor define will be enabled, and
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diff changeset
472 you can use the Uint64 and Sint64 datatypes.
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diff changeset
473
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diff changeset
474 Added functions to SDL_endian.h to support 64-bit datatypes:
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diff changeset
475 SDL_SwapLE64(), SDL_SwapBE64(),
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diff changeset
476 SDL_ReadLE64(), SDL_ReadBE64(), SDL_WriteLE64(), SDL_WriteBE64()
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diff changeset
477
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diff changeset
478 A new member "len_ratio" has been added to the SDL_AudioCVT structure,
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diff changeset
479 and allows you to determine either the original buffer length or the
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480 converted buffer length, given the other.
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diff changeset
481
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482 A new function SDL_FreeWAV() has been added to the API to free data
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diff changeset
483 allocated by SDL_LoadWAV_RW(). This is necessary under Win32 since
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diff changeset
484 the gcc compiled DLL uses a different heap than VC++ compiled apps.
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diff changeset
485
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diff changeset
486 SDL now has initial support for international keyboards using the
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diff changeset
487 Latin character set.
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diff changeset
488 If a particular mapping is desired, you can set the DEFAULT_KEYBOARD
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diff changeset
489 compile-time variable, or you can set the environment variable
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diff changeset
490 "SDL_KEYBOARD" to a string identifying the keyboard mapping you desire.
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diff changeset
491 The valid values for these variables can be found in SDL_keyboard.c
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diff changeset
492
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493 Full support for German and French keyboards under X11 is implemented.
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diff changeset
494
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parents:
diff changeset
495 0.9.11:
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parents:
diff changeset
496 The THREADED_EVENTS compile-time define has been replaced with the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
497 SDL_INIT_EVENTTHREAD flag. If this flag is passed to SDL_Init(),
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
498 SDL will create a separate thread to perform input event handling.
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
499 If this flag is passed to SDL_Init(), and the OS doesn't support
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
500 event handling in a separate thread, SDL_Init() will fail.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
501 Be sure to add calls to SDL_Delay() in your main thread to allow
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
502 the OS to schedule your event thread, or it may starve, leading
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
503 to slow event delivery and/or dropped events.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
504 Currently MacOS and Win32 do not support this flag, while BeOS
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
505 and Linux do support it. I recommend that your application only
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
506 use this flag if absolutely necessary.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
507
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
508 The SDL thread function passed to SDL_CreateThread() now returns a
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
509 status. This status can be retrieved by passing a non-NULL pointer
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
510 as the 'status' argument to SDL_WaitThread().
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
511
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
512 The volume parameter to SDL_MixAudio() has been increased in range
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
513 from (0-8) to (0-128)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
514
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
515 SDL now has a data source abstraction which can encompass a file,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
516 an area of memory, or any custom object you can envision. It uses
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
517 these abstractions, SDL_RWops, in the endian read/write functions,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
518 and the built-in WAV and BMP file loaders. This means you can load
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
519 WAV chunks from memory mapped files, compressed archives, network
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
520 pipes, or anything else that has a data read abstraction.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
521
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
522 There are three built-in data source abstractions:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
523 SDL_RWFromFile(), SDL_RWFromFP(), SDL_RWFromMem()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
524 along with a generic data source allocation function:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
525 SDL_AllocRW()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
526 These data sources can be used like stdio file pointers with the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
527 following convenience functions:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
528 SDL_RWseek(), SDL_RWread(), SDL_RWwrite(), SDL_RWclose()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
529 These functions are defined in the new header file "SDL_rwops.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
530
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
531 The endian swapping functions have been turned into macros for speed
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
532 and SDL_CalculateEndian() has been removed. SDL_endian.h now defines
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
533 SDL_BYTEORDER as either SDL_BIG_ENDIAN or SDL_LIL_ENDIAN depending on
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
534 the endianness of the host system.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
535
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
536 The endian read/write functions now take an SDL_RWops pointer
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
537 instead of a stdio FILE pointer, to support the new data source
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
538 abstraction.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
539
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
540 The SDL_*LoadWAV() functions have been replaced with a single
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
541 SDL_LoadWAV_RW() function that takes a SDL_RWops pointer as it's
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
542 first parameter, and a flag whether or not to automatically
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
543 free it as the second parameter. SDL_LoadWAV() is a macro for
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
544 backward compatibility and convenience:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
545 SDL_LoadWAV_RW(SDL_RWFromFile("sample.wav", "rb"), 1, ...);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
546
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
547 The SDL_*LoadBMP()/SDL_*SaveBMP() functions have each been replaced
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
548 with a single function that takes a SDL_RWops pointer as it's
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
549 first parameter, and a flag whether or not to automatically
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
550 free it as the second parameter. SDL_LoadBMP() and SDL_SaveBMP()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
551 are macros for backward compatibility and convenience:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
552 SDL_LoadBMP_RW(SDL_RWFromFile("sample.bmp", "rb"), 1, ...);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
553 SDL_SaveBMP_RW(SDL_RWFromFile("sample.bmp", "wb"), 1, ...);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
554 Note that these functions use SDL_RWseek() extensively, and should
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
555 not be used on pipes or other non-seekable data sources.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
556
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
557 0.9.10:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
558 The Linux SDL_SysWMInfo and SDL_SysWMMsg structures have been
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
559 extended to support multiple types of display drivers, as well as
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
560 safe access to the X11 display when THREADED_EVENTS is enabled.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
561 The new structures are documented in the SDL_syswm.h header file.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
562
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
563 Thanks to John Elliott <jce@seasip.demon.co.uk>, the UK keyboard
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
564 should now work properly, as well as the "Windows" keys on US
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
565 keyboards.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
566
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
567 The Linux CD-ROM code now reads the CD-ROM devices from /etc/fstab
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
568 instead of trying to open each block device on the system.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
569 The CD must be listed in /etc/fstab as using the iso9660 filesystem.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
570
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
571 On Linux, if you define THREADED_EVENTS at compile time, a separate
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
572 thread will be spawned to gather X events asynchronously from the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
573 graphics updates. This hasn't been extensively tested, but it does
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
574 provide a means of handling keyboard and mouse input in a separate
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
575 thread from the graphics thread. (This is now enabled by default.)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
576
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
577 A special access function SDL_PeepEvents() allows you to manipulate
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
578 the event queue in a thread-safe manner, including peeking at events,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
579 removing events of a specified type, and adding new events of arbitrary
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
580 type to the queue (use the new 'user' member of the SDL_Event type).
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
581
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
582 If you use SDL_PeepEvents() to gather events, then the main graphics
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
583 thread needs to call SDL_PumpEvents() periodically to drive the event
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
584 loop and generate input events. This is not necessary if SDL has been
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
585 compiled with THREADED_EVENTS defined, but doesn't hurt.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
586
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
587 A new function SDL_ThreadID() returns the identifier associated with
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
588 the current thread.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
589
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
590 0.9.9:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
591 The AUDIO_STEREO format flag has been replaced with a new 'channels'
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
592 member of the SDL_AudioSpec structure. The channels are 1 for mono
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
593 audio, and 2 for stereo audio. In the future more channels may be
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
594 supported for 3D surround sound.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
595
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
596 The SDL_MixAudio() function now takes an additional volume parameter,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
597 which should be set to SDL_MIX_MAXVOLUME for compatibility with the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
598 original function.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
599
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
600 The CD-ROM functions which take a 'cdrom' parameter can now be
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
601 passed NULL, and will act on the last successfully opened CD-ROM.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
602
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
603 0.9.8:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
604 No changes, bugfixes only.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
605
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
606 0.9.7:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
607 No changes, bugfixes only.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
608
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
609 0.9.6:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
610 Added a fast rectangle fill function: SDL_FillRect()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
611
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
612 Addition of a useful function for getting info on the video hardware:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
613 const SDL_VideoInfo *SDL_GetVideoInfo(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
614 This function replaces SDL_GetDisplayFormat().
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
615
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
616 Initial support for double-buffering:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
617 Use the SDL_DOUBLEBUF flag in SDL_SetVideoMode()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
618 Update the screen with a new function: SDL_Flip()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
619
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
620 SDL_AllocSurface() takes two new flags:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
621 SDL_SRCCOLORKEY means that the surface will be used for colorkey blits
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
622 and if the hardware supports hardware acceleration of colorkey blits
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
623 between two surfaces in video memory, to place the surface in video
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
624 memory if possible, otherwise it will be placed in system memory.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
625 SDL_SRCALPHA means that the surface will be used for alpha blits and
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
626 if the hardware supports hardware acceleration of alpha blits between
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
627 two surfaces in video memory, to place the surface in video memory
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
628 if possible, otherwise it will be placed in system memory.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
629 SDL_HWSURFACE now means that the surface will be created with the
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
630 same format as the display surface, since having surfaces in video
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
631 memory is only useful for fast blitting to the screen, and you can't
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
632 blit surfaces with different surface formats in video memory.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
633
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
634 0.9.5:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
635 You can now pass a NULL mask to SDL_WM_SetIcon(), and it will assume
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
636 that the icon consists of the entire image.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
637
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
638 SDL_LowerBlit() is back -- but don't use it on the display surface.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
639 It is exactly the same as SDL_MiddleBlit(), but doesn't check for
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
640 thread safety.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
641
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
642 Added SDL_FPLoadBMP(), SDL_FPSaveBMP(), SDL_FPLoadWAV(), which take
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
643 a FILE pointer instead of a file name.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
644
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
645 Added CD-ROM audio control API:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
646 SDL_CDNumDrives()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
647 SDL_CDName()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
648 SDL_CDOpen()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
649 SDL_CDStatus()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
650 SDL_CDPlayTracks()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
651 SDL_CDPlay()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
652 SDL_CDPause()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
653 SDL_CDResume()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
654 SDL_CDStop()
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
655 SDL_CDEject()
74212992fb08 Initial revision
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656 SDL_CDClose()
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Sam Lantinga <slouken@lokigames.com>
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657
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658 0.9.4:
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659 No changes, bugfixes only.
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660
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661 0.9.3:
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662 Mouse motion event now includes relative motion information:
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663 Sint16 event->motion.xrel, Sint16 event->motion.yrel
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664
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665 X11 keyrepeat handling can be disabled by defining IGNORE_X_KEYREPEAT
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666 (Add -DIGNORE_X_KEYREPEAT to CFLAGS line in obj/x11Makefile)
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667
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
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668 0.9.2:
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669 No changes, bugfixes only.
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Sam Lantinga <slouken@lokigames.com>
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670
74212992fb08 Initial revision
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671 0.9.1:
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672 Removed SDL_MapSurface() and SDL_UnmapSurface() -- surfaces are now
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673 automatically mapped on blit.
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674
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675 0.8.0:
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676 SDL stable release