Mercurial > sdl-ios-xcode
annotate XCodeiPhoneOS/Demos/src/keyboard.c @ 3096:ae4e80dbe330
Date: Tue, 17 Feb 2009 14:00:25 +0100
From: Stefan Klug
Subject: [SDL] Possible bug, paused audio playing garbage
On my WinCE device a paused audio device plays random garbage.
This might also be the issue in the thread "sound cracks with SDL_mixer
and AUDIO_S16LSB"
I don't have that much knowledge of the SDL audio part, but the attached
patch fixes it for me, and collapses two redundant ifs.
I'm not sure if this is the correct way to fix this.
Shouldn't the complete stream conversion part of the RunAudio loop be
dependent on the paused property of the device? (not only the call to
(*fill)(udata, istream, istream_len).
Anyways. Would be great if the patch or a fix could find its way to SVN ;-)
Cheers
Stefan
author | Sam Lantinga <slouken@libsdl.org> |
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date | Mon, 23 Mar 2009 05:21:40 +0000 |
parents | 375ee92745e8 |
children | 7f684f249ec9 |
rev | line source |
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2765
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1 /* |
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2 * keyboard.c |
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3 * written by Holmes Futrell |
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4 * use however you want |
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5 */ |
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6 |
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7 #import "SDL.h" |
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8 #import "common.h" |
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9 |
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10 #define GLYPH_SIZE_IMAGE 16 /* size of glyphs (characters) in the bitmap font file */ |
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11 #define GLYPH_SIZE_SCREEN 32 /* size of glyphs (characters) as shown on the screen */ |
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12 |
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13 static SDL_TextureID textureID; /* texture where we'll hold our font */ |
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14 |
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15 /* iPhone SDL addition keyboard related function definitions */ |
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16 extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardShow(SDL_WindowID windowID); |
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17 extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardHide(SDL_WindowID windowID); |
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18 extern DECLSPEC SDL_bool SDLCALL SDL_iPhoneKeyboardIsShown(SDL_WindowID |
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19 windowID); |
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20 extern DECLSPEC int SDLCALL SDL_iPhoneKeyboardToggle(SDL_WindowID windowID); |
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21 |
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22 /* function declarations */ |
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23 void cleanup(void); |
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24 void drawBlank(int x, int y); |
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25 |
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26 static int numChars = 0; /* number of characters we've typed so far */ |
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27 static SDL_bool lastCharWasColon = 0; /* we use this to detect sequences such as :) */ |
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28 static SDL_Color bg_color = { 50, 50, 100, 255 }; /* color of background */ |
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29 |
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30 /* this structure maps a scancode to an index in our bitmap font. |
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31 it also contains data about under which modifiers the mapping is valid |
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32 (for example, we don't want shift + 1 to produce the character '1', |
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33 but rather the character '!') |
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34 */ |
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35 typedef struct |
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36 { |
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37 SDL_scancode scancode; /* scancode of the key we want to map */ |
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38 int allow_no_mod; /* is the map valid if the key has no modifiers? */ |
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39 SDLMod mod; /* what modifiers are allowed for the mapping */ |
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40 int index; /* what index in the font does the scancode map to */ |
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41 } fontMapping; |
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42 |
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43 #define TABLE_SIZE 51 /* size of our table which maps keys and modifiers to font indices */ |
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44 |
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45 /* Below is the table that defines the mapping between scancodes and modifiers to indices in the |
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46 bitmap font. As an example, then line '{ SDL_SCANCODE_A, 1, KMOD_SHIFT, 33 }' means, map |
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47 the key A (which has scancode SDL_SCANCODE_A) to index 33 in the font (which is a picture of an A), |
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48 The '1' means that the mapping is valid even if there are no modifiers, and KMOD_SHIFT means the |
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49 mapping is also valid if the user is holding shift. |
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50 */ |
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51 fontMapping map[TABLE_SIZE] = { |
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52 |
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53 {SDL_SCANCODE_A, 1, KMOD_SHIFT, 33}, /* A */ |
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54 {SDL_SCANCODE_B, 1, KMOD_SHIFT, 34}, /* B */ |
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55 {SDL_SCANCODE_C, 1, KMOD_SHIFT, 35}, /* C */ |
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56 {SDL_SCANCODE_D, 1, KMOD_SHIFT, 36}, /* D */ |
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57 {SDL_SCANCODE_E, 1, KMOD_SHIFT, 37}, /* E */ |
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58 {SDL_SCANCODE_F, 1, KMOD_SHIFT, 38}, /* F */ |
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59 {SDL_SCANCODE_G, 1, KMOD_SHIFT, 39}, /* G */ |
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60 {SDL_SCANCODE_H, 1, KMOD_SHIFT, 40}, /* H */ |
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61 {SDL_SCANCODE_I, 1, KMOD_SHIFT, 41}, /* I */ |
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62 {SDL_SCANCODE_J, 1, KMOD_SHIFT, 42}, /* J */ |
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63 {SDL_SCANCODE_K, 1, KMOD_SHIFT, 43}, /* K */ |
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64 {SDL_SCANCODE_L, 1, KMOD_SHIFT, 44}, /* L */ |
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65 {SDL_SCANCODE_M, 1, KMOD_SHIFT, 45}, /* M */ |
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66 {SDL_SCANCODE_N, 1, KMOD_SHIFT, 46}, /* N */ |
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67 {SDL_SCANCODE_O, 1, KMOD_SHIFT, 47}, /* O */ |
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68 {SDL_SCANCODE_P, 1, KMOD_SHIFT, 48}, /* P */ |
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69 {SDL_SCANCODE_Q, 1, KMOD_SHIFT, 49}, /* Q */ |
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70 {SDL_SCANCODE_R, 1, KMOD_SHIFT, 50}, /* R */ |
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71 {SDL_SCANCODE_S, 1, KMOD_SHIFT, 51}, /* S */ |
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72 {SDL_SCANCODE_T, 1, KMOD_SHIFT, 52}, /* T */ |
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73 {SDL_SCANCODE_U, 1, KMOD_SHIFT, 53}, /* U */ |
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74 {SDL_SCANCODE_V, 1, KMOD_SHIFT, 54}, /* V */ |
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75 {SDL_SCANCODE_W, 1, KMOD_SHIFT, 55}, /* W */ |
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76 {SDL_SCANCODE_X, 1, KMOD_SHIFT, 56}, /* X */ |
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77 {SDL_SCANCODE_Y, 1, KMOD_SHIFT, 57}, /* Y */ |
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78 {SDL_SCANCODE_Z, 1, KMOD_SHIFT, 58}, /* Z */ |
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79 {SDL_SCANCODE_0, 1, 0, 16}, /* 0 */ |
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80 {SDL_SCANCODE_1, 1, 0, 17}, /* 1 */ |
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81 {SDL_SCANCODE_2, 1, 0, 18}, /* 2 */ |
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82 {SDL_SCANCODE_3, 1, 0, 19}, /* 3 */ |
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83 {SDL_SCANCODE_4, 1, 0, 20}, /* 4 */ |
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84 {SDL_SCANCODE_5, 1, 0, 21}, /* 5 */ |
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85 {SDL_SCANCODE_6, 1, 0, 22}, /* 6 */ |
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86 {SDL_SCANCODE_7, 1, 0, 23}, /* 7 */ |
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87 {SDL_SCANCODE_8, 1, 0, 24}, /* 8 */ |
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88 {SDL_SCANCODE_9, 1, 0, 25}, /* 9 */ |
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89 {SDL_SCANCODE_SPACE, 1, 0, 0}, /*' ' */ |
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90 {SDL_SCANCODE_1, 0, KMOD_SHIFT, 1}, /* ! */ |
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91 {SDL_SCANCODE_SLASH, 0, KMOD_SHIFT, 31}, /* ? */ |
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92 {SDL_SCANCODE_SLASH, 1, 0, 15}, /* / */ |
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93 {SDL_SCANCODE_COMMA, 1, 0, 12}, /* , */ |
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94 {SDL_SCANCODE_SEMICOLON, 1, 0, 27}, /* ; */ |
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95 {SDL_SCANCODE_SEMICOLON, 0, KMOD_SHIFT, 26}, /* : */ |
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96 {SDL_SCANCODE_PERIOD, 1, 0, 14}, /* . */ |
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97 {SDL_SCANCODE_MINUS, 1, 0, 13}, /* - */ |
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98 {SDL_SCANCODE_EQUALS, 0, KMOD_SHIFT, 11}, /* = */ |
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99 {SDL_SCANCODE_APOSTROPHE, 1, 0, 7}, /* ' */ |
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100 {SDL_SCANCODE_APOSTROPHE, 0, KMOD_SHIFT, 2}, /* " */ |
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101 {SDL_SCANCODE_5, 0, KMOD_SHIFT, 5}, /* % */ |
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102 |
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103 }; |
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104 |
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105 /* |
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106 This function maps an SDL_keysym to an index in the bitmap font. |
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107 It does so by scanning through the font mapping table one entry |
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108 at a time. |
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109 |
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110 If a match is found (scancode and allowed modifiers), the proper |
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111 index is returned. |
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112 |
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113 If there is no entry for the key, -1 is returned |
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114 */ |
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115 int |
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116 keyToIndex(SDL_keysym key) |
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117 { |
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118 int i, index = -1; |
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119 for (i = 0; i < TABLE_SIZE; i++) { |
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120 fontMapping compare = map[i]; |
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121 if (key.scancode == compare.scancode) { |
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122 /* if this entry is valid with no key mod and we have no keymod, or if |
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123 the key's modifiers are allowed modifiers for that mapping */ |
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124 if ((compare.allow_no_mod && key.mod == 0) |
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125 || (key.mod & compare.mod)) { |
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126 index = compare.index; |
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127 break; |
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128 } |
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129 } |
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130 } |
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131 return index; |
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132 } |
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133 |
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134 /* |
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135 This function returns and x,y position for a given character number. |
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136 It is used for positioning each character of text |
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137 */ |
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138 void |
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139 getPositionForCharNumber(int n, int *x, int *y) |
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140 { |
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141 int x_padding = 16; /* padding space on left and right side of screen */ |
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142 int y_padding = 32; /* padding space at top of screen */ |
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143 /* figure out the number of characters that can fit horizontally across the screen */ |
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144 int max_x_chars = (SCREEN_WIDTH - 2 * x_padding) / GLYPH_SIZE_SCREEN; |
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145 int line_separation = 5; /* pixels between each line */ |
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146 *x = (n % max_x_chars) * GLYPH_SIZE_SCREEN + x_padding; |
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147 *y = (n / max_x_chars) * (GLYPH_SIZE_SCREEN + line_separation) + |
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148 y_padding; |
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149 } |
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150 |
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151 void |
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152 drawIndex(int index) |
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153 { |
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154 int x, y; |
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155 getPositionForCharNumber(numChars, &x, &y); |
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156 SDL_Rect srcRect = |
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157 { GLYPH_SIZE_IMAGE * index, 0, GLYPH_SIZE_IMAGE, GLYPH_SIZE_IMAGE }; |
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158 SDL_Rect dstRect = { x, y, GLYPH_SIZE_SCREEN, GLYPH_SIZE_SCREEN }; |
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159 drawBlank(x, y); |
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160 SDL_RenderCopy(textureID, &srcRect, &dstRect); |
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161 } |
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162 |
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163 /* draws the cursor icon at the current end position of the text */ |
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164 void |
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165 drawCursor(void) |
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166 { |
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167 drawIndex(29); /* cursor is at index 29 in the bitmap font */ |
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168 } |
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169 |
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170 /* paints over a glyph sized region with the background color |
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171 in effect it erases the area |
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172 */ |
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173 void |
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174 drawBlank(int x, int y) |
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175 { |
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176 SDL_Rect rect = { x, y, GLYPH_SIZE_SCREEN, GLYPH_SIZE_SCREEN }; |
3093 | 177 SDL_SetRenderDrawColor(bg_color.r, bg_color.g, bg_color.b, bg_color.unused); |
178 SDL_RenderFill(&rect); | |
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179 } |
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180 |
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181 /* moves backwards one character, erasing the last one put down */ |
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182 void |
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183 backspace(void) |
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184 { |
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185 int x, y; |
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186 if (numChars > 0) { |
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187 getPositionForCharNumber(numChars, &x, &y); |
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188 drawBlank(x, y); |
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189 numChars--; |
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190 getPositionForCharNumber(numChars, &x, &y); |
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191 drawBlank(x, y); |
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192 drawCursor(); |
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193 } |
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194 } |
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195 |
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196 /* this function loads our font into an SDL_Texture and returns the SDL_TextureID */ |
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197 SDL_TextureID |
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198 loadFont(void) |
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199 { |
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200 |
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201 SDL_Surface *surface = SDL_LoadBMP("kromasky_16x16.bmp"); |
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202 |
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203 if (!surface) { |
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204 printf("Error loading bitmap: %s\n", SDL_GetError()); |
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205 return 0; |
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206 } else { |
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207 /* set the transparent color for the bitmap font (hot pink) */ |
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208 SDL_SetColorKey(surface, 1, SDL_MapRGB(surface->format, 238, 0, 252)); |
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209 /* now we convert the surface to our desired pixel format */ |
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210 int format = SDL_PIXELFORMAT_ABGR8888; /* desired texture format */ |
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211 Uint32 Rmask, Gmask, Bmask, Amask; /* masks for desired format */ |
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212 int bpp; /* bits per pixel for desired format */ |
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213 SDL_PixelFormatEnumToMasks(format, &bpp, &Rmask, &Gmask, &Bmask, |
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214 &Amask); |
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215 SDL_Surface *converted = |
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216 SDL_CreateRGBSurface(0, surface->w, surface->h, bpp, Rmask, Gmask, |
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217 Bmask, Amask); |
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218 SDL_BlitSurface(surface, NULL, converted, NULL); |
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219 /* create our texture */ |
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220 textureID = |
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221 SDL_CreateTextureFromSurface(SDL_PIXELFORMAT_ABGR8888, converted); |
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222 if (textureID == 0) { |
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223 printf("texture creation failed: %s\n", SDL_GetError()); |
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224 } else { |
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225 /* set blend mode for our texture */ |
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226 SDL_SetTextureBlendMode(textureID, SDL_BLENDMODE_BLEND); |
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227 } |
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228 SDL_FreeSurface(surface); |
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229 SDL_FreeSurface(converted); |
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230 return textureID; |
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231 } |
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232 } |
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233 |
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234 int |
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235 main(int argc, char *argv[]) |
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236 { |
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237 |
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238 int index; /* index of last key we pushed in the bitmap font */ |
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239 SDL_Event event; /* last event received */ |
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240 SDLMod mod; /* key modifiers of last key we pushed */ |
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241 SDL_scancode scancode; /* scancode of last key we pushed */ |
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242 |
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243 if (SDL_Init(SDL_INIT_VIDEO) < 0) { |
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244 printf("Error initializing SDL: %s", SDL_GetError()); |
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245 } |
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246 /* create window */ |
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247 SDL_WindowID windowID = |
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248 SDL_CreateWindow("iPhone keyboard test", 0, 0, SCREEN_WIDTH, |
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249 SCREEN_HEIGHT, 0); |
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250 /* create renderer */ |
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251 SDL_CreateRenderer(windowID, 0, 0); |
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252 |
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253 /* load up our font */ |
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254 loadFont(); |
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255 |
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256 /* draw the background, we'll just paint over it */ |
3093 | 257 SDL_SetRenderDrawColor(bg_color.r, bg_color.g, bg_color.b, bg_color.unused); |
258 SDL_RenderFill(NULL); | |
2765
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259 SDL_RenderPresent(); |
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260 |
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261 int done = 0; |
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262 /* loop till we get SDL_Quit */ |
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263 while (SDL_WaitEvent(&event)) { |
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264 switch (event.type) { |
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265 case SDL_QUIT: |
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266 done = 1; |
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267 break; |
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268 case SDL_KEYDOWN: |
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269 index = keyToIndex(event.key.keysym); |
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270 scancode = event.key.keysym.scancode; |
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271 mod = event.key.keysym.mod; |
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272 if (scancode == SDL_SCANCODE_DELETE) { |
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273 /* if user hit delete, delete the last character */ |
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274 backspace(); |
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275 lastCharWasColon = 0; |
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276 } else if (lastCharWasColon && scancode == SDL_SCANCODE_0 |
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277 && (mod & KMOD_SHIFT)) { |
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278 /* if our last key was a colon and this one is a close paren, the make a hoppy face */ |
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279 backspace(); |
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280 drawIndex(32); /* index for happy face */ |
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281 numChars++; |
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282 drawCursor(); |
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283 lastCharWasColon = 0; |
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284 } else if (index != -1) { |
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285 /* if we aren't doing a happy face, then just draw the normal character */ |
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286 drawIndex(index); |
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287 numChars++; |
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288 drawCursor(); |
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289 lastCharWasColon = |
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290 (event.key.keysym.scancode == SDL_SCANCODE_SEMICOLON |
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291 && (event.key.keysym.mod & KMOD_SHIFT)); |
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292 } |
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293 /* check if the key was a colon */ |
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294 /* draw our updates to the screen */ |
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295 SDL_RenderPresent(); |
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296 break; |
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297 #ifdef __IPHONEOS__ |
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298 case SDL_MOUSEBUTTONUP: |
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299 /* mouse up toggles onscreen keyboard visibility |
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300 this function is available ONLY on iPhone OS |
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301 */ |
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302 SDL_iPhoneKeyboardToggle(windowID); |
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303 break; |
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304 #endif |
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305 } |
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306 } |
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307 cleanup(); |
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308 return 0; |
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309 } |
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310 |
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311 /* clean up after ourselves like a good kiddy */ |
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312 void |
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313 cleanup(void) |
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314 { |
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315 SDL_DestroyTexture(textureID); |
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316 SDL_Quit(); |
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317 } |