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annotate include/SDL_keyboard.h @ 4590:1ad70fb49fcb

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Fix so many things that there is little place in this column to list them all but the result is that blending modes just work now for drawing primitives. Fixes involved: 1. Fix handling of alpha channel when SDL_BLENDMODE_NONE is set. 2. Make xrendercolor use floating-point values for color channels and then convert to 16 bit ints. 3. Fix handling of visuals in SDL_x11modes.c so that a 32 bit ARGB visual is used. 4. Fix the background pixel value in SDL_x11window.c so that the window background has an alpha value of 0xFF and not 0.
author Sunny Sachanandani <sunnysachanandani@gmail.com>
date Fri, 09 Jul 2010 21:36:41 +0530
parents f7b03b6838cb
children 3e69e077cb95
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /**
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24 * \file SDL_keyboard.h
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25 *
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26 * Include file for SDL keyboard event handling
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27 */
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28
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29 #ifndef _SDL_keyboard_h
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30 #define _SDL_keyboard_h
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31
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32 #include "SDL_stdinc.h"
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33 #include "SDL_error.h"
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34 #include "SDL_keysym.h"
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35
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36 #include "begin_code.h"
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37 /* Set up for C function definitions, even when using C++ */
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38 #ifdef __cplusplus
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39 /* *INDENT-OFF* */
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40 extern "C" {
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41 /* *INDENT-ON* */
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42 #endif
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43
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44 /**
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45 * \brief The SDL keysym structure, used in key events.
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46 */
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47 typedef struct SDL_keysym
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48 {
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49 SDL_scancode scancode; /**< SDL physical key code - see ::SDL_scancode for details */
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50 SDLKey sym; /**< SDL virtual key code - see ::SDLKey for details */
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51 Uint16 mod; /**< current key modifiers */
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52 Uint32 unicode; /**< \deprecated use SDL_TextInputEvent instead */
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53 } SDL_keysym;
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54
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55 /* Function prototypes */
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56
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57 /**
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58 * \brief Get the number of keyboard input devices available.
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59 *
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60 * \sa SDL_SelectKeyboard()
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61 */
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62 extern DECLSPEC int SDLCALL SDL_GetNumKeyboards(void);
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63
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64 /**
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65 * \brief Set the index of the currently selected keyboard.
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66 *
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67 * \return The index of the previously selected keyboard.
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68 *
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69 * \note You can query the currently selected keyboard by passing an index of -1.
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70 *
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71 * \sa SDL_GetNumKeyboards()
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72 */
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73 extern DECLSPEC int SDLCALL SDL_SelectKeyboard(int index);
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74
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75 /**
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76 * \brief Get a snapshot of the current state of the selected keyboard.
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77 *
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78 * \param numkeys if non-NULL, receives the length of the returned array.
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79 *
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80 * \return An array of key states. Indexes into this array are obtained by using ::SDL_scancode values.
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81 *
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82 * \b Example:
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83 * \code
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84 * Uint8 *state = SDL_GetKeyboardState(NULL);
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85 * if ( state[SDL_SCANCODE_RETURN] ) {
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86 * printf("<RETURN> is pressed.\n");
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87 * }
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88 * \endcode
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89 */
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90 extern DECLSPEC Uint8 *SDLCALL SDL_GetKeyboardState(int *numkeys);
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91
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92 /**
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93 * \brief Get the current key modifier state for the selected keyboard.
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94 */
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95 extern DECLSPEC SDLMod SDLCALL SDL_GetModState(void);
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96
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97 /**
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98 * \brief Set the current key modifier state for the selected keyboard.
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99 *
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100 * \note This does not change the keyboard state, only the key modifier flags.
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101 */
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102 extern DECLSPEC void SDLCALL SDL_SetModState(SDLMod modstate);
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103
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104 /**
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105 * \brief Get the key code corresponding to the given scancode according to the
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106 * current keyboard layout.
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107 *
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108 * See ::SDLKey for details.
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109 *
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110 * \sa SDL_GetKeyName()
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111 */
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112 extern DECLSPEC SDLKey SDLCALL SDL_GetKeyFromScancode(SDL_scancode scancode);
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113
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114 /**
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115 * \brief Get the scancode corresponding to the given key code according to the
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116 * current keyboard layout.
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117 *
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118 * See ::SDL_scancode for details.
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119 *
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120 * \sa SDL_GetScancodeName()
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121 */
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122 extern DECLSPEC SDL_scancode SDLCALL SDL_GetScancodeFromKey(SDLKey key);
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123
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124 /**
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125 * \brief Get a human-readable name for a scancode.
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126 *
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127 * \return A pointer to a UTF-8 string that stays valid at least until the next
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128 * call to this function. If you need it around any longer, you must
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129 * copy it. If the scancode doesn't have a name, this function returns
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130 * an empty string ("").
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131 *
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132 * \sa SDL_scancode
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133 */
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134 extern DECLSPEC const char *SDLCALL SDL_GetScancodeName(SDL_scancode
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135 scancode);
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136
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137 /**
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138 * \brief Get a human-readable name for a key.
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139 *
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140 * \return A pointer to a UTF-8 string that stays valid at least until the next
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141 * call to this function. If you need it around any longer, you must
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142 * copy it. If the key doesn't have a name, this function returns an
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143 * empty string ("").
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144 *
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145 * \sa SDLKey
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146 */
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147 extern DECLSPEC const char *SDLCALL SDL_GetKeyName(SDLKey key);
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148
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149 /**
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150 * \brief Start accepting Unicode text input events.
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151 *
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152 * \sa SDL_StopTextInput()
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153 * \sa SDL_SetTextInputRect()
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154 */
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155 extern DECLSPEC void SDLCALL SDL_StartTextInput(void);
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156
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157 /**
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158 * \brief Stop receiving any text input events.
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159 *
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160 * \sa SDL_StartTextInput()
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161 */
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162 extern DECLSPEC void SDLCALL SDL_StopTextInput(void);
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163
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164 /**
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165 * \brief Set the rectangle used to type Unicode text inputs.
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166 *
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167 * \sa SDL_StartTextInput()
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168 */
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169 extern DECLSPEC void SDLCALL SDL_SetTextInputRect(SDL_Rect *rect);
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170
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171
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172 /* Ends C function definitions when using C++ */
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173 #ifdef __cplusplus
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174 /* *INDENT-OFF* */
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175 }
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176 /* *INDENT-ON* */
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177 #endif
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178 #include "close_code.h"
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179
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180 #endif /* _SDL_keyboard_h */
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181
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182 /* vi: set ts=4 sw=4 expandtab: */