1 | ; File name : MenuCharOut.asm |
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2 | ; Project name : Assembly Library |
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3 | ; Created date : 15.7.2010 |
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4 | ; Last update : 8.10.2010 |
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5 | ; Author : Tomi Tilli |
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6 | ; Description : Character out function for printing withing menu window. |
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7 | |
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8 | ; Section containing code |
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9 | SECTION .text |
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10 | |
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11 | ;-------------------------------------------------------------------- |
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12 | ; MenuCharOut_MenuBorderTeletypeOutputWithAttribute |
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13 | ; Parameters: |
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14 | ; AL: Character to output |
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15 | ; AH: Attribute to output |
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16 | ; DS: BDA segment (zero) |
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17 | ; ES:DI: Ptr to video memory where to output |
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18 | ; Returns: |
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19 | ; DI: Incremented for next character |
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20 | ; Corrupts registers: |
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21 | ; AX, DX |
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22 | ;-------------------------------------------------------------------- |
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23 | ALIGN JUMP_ALIGN |
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24 | MenuCharOut_MenuBorderTeletypeOutputWithAttribute: |
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25 | cmp al, CR ; Carriage return? |
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26 | je SHORT .PrintCRandAdjustColumnToMenuBorders |
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27 | jmp DisplayCharOut_TeletypeOutputWithAttribute |
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28 | |
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29 | ALIGN JUMP_ALIGN |
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30 | .PrintCRandAdjustColumnToMenuBorders: |
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31 | call DisplayCharOut_BiosTeletypeOutput |
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32 | xor ax, ax ; No offset, cursor to start of border |
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33 | jmp SHORT SetCursorToNextMenuLine |
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34 | |
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35 | |
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36 | ;-------------------------------------------------------------------- |
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37 | ; MenuCharOut_MenuTextTeletypeOutputWithAttributeAndAutomaticLineChange |
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38 | ; MenuCharOut_MenuTextTeletypeOutputWithAttribute |
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39 | ; Parameters: |
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40 | ; AL: Character to output |
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41 | ; AH: Attribute to output |
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42 | ; DS: BDA segment (zero) |
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43 | ; ES:DI: Ptr to video memory where to output |
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44 | ; Returns: |
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45 | ; DI: Incremented for next character |
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46 | ; Corrupts registers: |
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47 | ; AX, DX |
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48 | ;-------------------------------------------------------------------- |
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49 | ALIGN JUMP_ALIGN |
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50 | MenuCharOut_MenuTextTeletypeOutputWithAttributeAndAutomaticLineChange: |
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51 | push di |
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52 | push ax |
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53 | mov al, DOUBLE_VERTICAL |
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54 | add di, BYTE MENU_TEXT_COLUMN_OFFSET ; Border char comes after space |
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55 | WAIT_RETRACE_IF_NECESSARY_THEN scasb |
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56 | pop ax |
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57 | pop di |
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58 | je SHORT MovePartialWordToNewTextLineAndPrintCharacterFromAX |
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59 | ; Fall to MenuCharOut_MenuTextTeletypeOutputWithAttribute |
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60 | |
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61 | ALIGN JUMP_ALIGN |
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62 | MenuCharOut_MenuTextTeletypeOutputWithAttribute: |
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63 | cmp al, CR ; Carriage return? |
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64 | je SHORT PrintCRfromALandAdjustColumnToMenuText |
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65 | jmp DisplayCharOut_TeletypeOutputWithAttribute |
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66 | |
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67 | |
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68 | ;-------------------------------------------------------------------- |
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69 | ; MovePartialWordToNewTextLineAndPrintCharacterFromAX |
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70 | ; Parameters: |
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71 | ; AL: Character to output |
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72 | ; AH: Attribute to output |
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73 | ; DS: BDA segment (zero) |
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74 | ; ES:DI: Ptr to end of text line in video memory |
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75 | ; Returns: |
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76 | ; DI: Incremented for next character |
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77 | ; Corrupts registers: |
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78 | ; AX, DX |
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79 | ;-------------------------------------------------------------------- |
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80 | ALIGN JUMP_ALIGN |
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81 | MovePartialWordToNewTextLineAndPrintCharacterFromAX: |
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82 | cmp al, ' ' |
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83 | je SHORT .MoveCursorInDItoBeginningOfNextLine |
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84 | push si |
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85 | push cx |
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86 | push ax |
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87 | |
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88 | call .GetOffsetToPartialWordToSIandSizeToCX |
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89 | call .MoveCursorInDItoBeginningOfNextLine |
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90 | jcxz .NothingToMove |
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91 | call .MovePartialWordFromPreviousLineInESSItoNewLineInESDIwithSizeInCX |
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92 | .NothingToMove: |
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93 | pop ax |
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94 | pop cx |
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95 | pop si |
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96 | jmp DisplayCharOut_TeletypeOutputWithAttribute |
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97 | |
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98 | ;-------------------------------------------------------------------- |
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99 | ; .GetOffsetToPartialWordToSIandSizeToCX |
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100 | ; Parameters: |
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101 | ; ES:DI: Ptr to space before border character |
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102 | ; Returns: |
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103 | ; CX: Number of bytes that needs to be moved |
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104 | ; ES:SI: Ptr to beginning of partial word that needs to be moved to new line |
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105 | ; Corrupts registers: |
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106 | ; Nothing |
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107 | ;-------------------------------------------------------------------- |
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108 | ALIGN JUMP_ALIGN |
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109 | .GetOffsetToPartialWordToSIandSizeToCX: |
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110 | xor cx, cx |
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111 | mov si, di |
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112 | ALIGN JUMP_ALIGN |
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113 | .ScanNextCharacter: ; Space will always be found since one comes after border |
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114 | dec si |
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115 | dec si |
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116 | cmp BYTE [es:si], ' ' |
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117 | je SHORT .PartialWordFound |
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118 | inc cx |
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119 | jmp SHORT .ScanNextCharacter |
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120 | ALIGN JUMP_ALIGN |
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121 | .PartialWordFound: |
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122 | inc si |
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123 | inc si ; SI now points one past space |
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124 | shl cx, 1 ; Characters to bytes |
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125 | ret |
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126 | |
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127 | ;-------------------------------------------------------------------- |
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128 | ; .MovePartialWordFromPreviousLineInESSItoNewLineInESDIwithSizeInCX |
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129 | ; Parameters: |
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130 | ; CX: Number of bytes in partial word |
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131 | ; DS: BDA segment (zero) |
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132 | ; ES:SI: Ptr to partial word on previous line |
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133 | ; ES:DI: Ptr to new empty line |
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134 | ; Returns: |
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135 | ; ES:DI: Ptr where to store next character |
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136 | ; Corrupts registers: |
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137 | ; AX, CX, DX, SI |
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138 | ;-------------------------------------------------------------------- |
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139 | ALIGN JUMP_ALIGN |
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140 | .MovePartialWordFromPreviousLineInESSItoNewLineInESDIwithSizeInCX: |
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141 | push si |
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142 | push cx |
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143 | WAIT_RETRACE_IF_NECESSARY_THEN rep movsb |
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144 | pop cx |
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145 | pop si |
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146 | xchg di, si |
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147 | shr cx, 1 ; Bytes to characters |
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148 | mov al, ' ' |
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149 | call DisplayPrint_RepeatCharacterFromALwithCountInCX |
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150 | mov di, si |
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151 | ret |
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152 | |
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153 | ;-------------------------------------------------------------------- |
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154 | ; .MoveCursorInDItoBeginningOfNextLine |
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155 | ; Parameters: |
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156 | ; DS: BDA segment (zero) |
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157 | ; ES:DI: Ptr to cursor location |
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158 | ; Returns: |
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159 | ; ES:DI: Ptr to beginning of new line |
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160 | ; Corrupts registers: |
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161 | ; AX, DX |
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162 | ;-------------------------------------------------------------------- |
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163 | ALIGN JUMP_ALIGN |
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164 | .MoveCursorInDItoBeginningOfNextLine: |
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165 | mov al, LF |
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166 | call DisplayCharOut_BiosTeletypeOutput |
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167 | mov al, CR |
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168 | ; Fall to PrintCRfromALandAdjustColumnToMenuText |
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169 | |
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170 | |
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171 | ;-------------------------------------------------------------------- |
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172 | ; PrintCRfromALandAdjustColumnToMenuText |
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173 | ; Parameters: |
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174 | ; AL: Character to output (CR) |
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175 | ; DS: BDA segment (zero) |
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176 | ; ES:DI: Ptr to video memory where to output |
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177 | ; Returns: |
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178 | ; DI: Incremented for next text line |
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179 | ; Corrupts registers: |
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180 | ; AX, DX |
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181 | ;-------------------------------------------------------------------- |
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182 | ALIGN JUMP_ALIGN |
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183 | PrintCRfromALandAdjustColumnToMenuText: |
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184 | call DisplayCharOut_BiosTeletypeOutput |
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185 | mov al, MENU_TEXT_COLUMN_OFFSET ; Offset to start of text |
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186 | ; Fall to SetCursorToNextMenuLine |
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187 | |
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188 | ;-------------------------------------------------------------------- |
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189 | ; SetCursorToNextMenuLine |
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190 | ; Parameters: |
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191 | ; AL: Column offset from start of borders |
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192 | ; DS: BDA segment (zero) |
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193 | ; ES:DI: Ptr to video memory where to output |
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194 | ; Returns: |
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195 | ; DI: Adjusted for next line |
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196 | ; Corrupts registers: |
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197 | ; AX, DX |
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198 | ;-------------------------------------------------------------------- |
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199 | ALIGN JUMP_ALIGN |
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200 | SetCursorToNextMenuLine: |
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201 | push bp |
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202 | |
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203 | mov bp, [VIDEO_BDA.displayContext+DISPLAY_CONTEXT.wCharOutParam] |
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204 | call .AddCoordinatesForNewBorderLineToAX |
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205 | call DisplayCursor_SetCoordinatesFromAX ; Updates DI |
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206 | |
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207 | pop bp |
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208 | ret |
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209 | |
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210 | ;-------------------------------------------------------------------- |
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211 | ; .AddCoordinatesForNewBorderLineToAX |
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212 | ; Parameters: |
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213 | ; AL: Column offset from start of borders |
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214 | ; DS: BDA segment (zero) |
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215 | ; SS:BP: Ptr to MENU |
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216 | ; Returns: |
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217 | ; AX: Coordinates for new line |
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218 | ; Corrupts registers: |
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219 | ; DX |
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220 | ;-------------------------------------------------------------------- |
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221 | ALIGN JUMP_ALIGN |
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222 | .AddCoordinatesForNewBorderLineToAX: |
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223 | call MenuLocation_AddTitleBordersTopLeftCoordinatesToAX |
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224 | push ax |
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225 | call DisplayCursor_GetSoftwareCoordinatesToAX |
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226 | pop dx |
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227 | mov al, dl ; Adjust column to borders |
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228 | ret |
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