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1 ;=============================================================================
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2 ;
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3 ; File aa_wordprocessor.asm combined next generation V3.03.1
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4 ;
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5 ; Anti-aliased word processor
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6 ;
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7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved.
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8 ;=============================================================================
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9 ; HISTORY
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604
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10 ; 2010-11-22 : [jDG] Creation
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11 ; 2010-12-01 : [jDG] Adding 3bits anti-aliased fonts
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12 ; 2010-12-30 : [jDG] Revised to put temp into ACCESSRAM0
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13 ; 2012-08-12 : [mH] Moved font28 into bootloader section 0x1C000
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14 ;
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15 ; BUGS :
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16 ; * If the three fonts are not in the same half of the PROM memory, TBLPTRU
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17 ; will be badly set, and font48 or font90 will display gibberish...
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18 ;=============================================================================
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19 ;
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20 ; MEMORY FOOTPRINT:
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21 ;------------------
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22 ;
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23 ; wp_wordprocessor : 8 KB, including fonts
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24 ; aa_wordprocessor : 0.5 KB code
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25 ; + 3.5 KB aa_font28 (reduced to 99 chars)
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26 ; + 1.6 KB aa_font48
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27 ; + 2.2 KB aa_font90
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28 ; = 7.9 KB including fonts
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0
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29 ;
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30 ; Input registers:
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31 ; buffer:26 String to print
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32 ; win_font Font size (0=tiny, 1=small, 2=std, 3=medium, 4=large, 5=XL)
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33 ; win_color1:2 16bits unpacked color
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34 ; win_top, win_leftx2 Position on screen
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35 ; win_inverse Inverse video mode
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0
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36 ;
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37 ; Available general purpose registers:
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623
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38 ; PRODH, PRODL needed for array indexing
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39 ; FSRx 12bits, used for indirect addressing
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40 ;=============================================================================
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41
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275
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42 #include "hwos.inc"
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0
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43 #include "tft.inc"
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44
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45 extern aa_font16_block
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46 extern aa_font28_block
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47 extern aa_font34_block
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48 extern aa_font48_block
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49 extern aa_font90_block
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0
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50
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51 IFDEF _huge_font
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52 extern aa_font92_block
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53 ENDIF
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54
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608
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55 extern convert_for_display2
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56
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57
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58 aa_word CODE
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59
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60 ;=============================================================================
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61
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62 ;------------------------------------------------------------------------------
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63 ; Setup pointers for a char:
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64 ; Inputs WREG = char to draw, win_font
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65 ; Output aa_start, aa_end, win_height, AA_flags
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66 ; Trashed PRODH, PRODL, TBLPTR, TABLAT
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0
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67 ;
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68 aa_char_setup:
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69 movwf PRODL ; save char into PROD for now
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604
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70 movf win_font,W ; get font number (updates Z flag)
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71 bnz aa_char_1 ; requested tiny font? (bra of no)
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0
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72
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73 ; 0: TINY font -------------------------------------------------------
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74 ; Font TINY character folding...
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0
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75 aa_char_0:
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76 movlw LOW aa_font16_block
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77 movwf TBLPTRL
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78 movlw HIGH aa_font16_block
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79 movwf TBLPTRH
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80 movlw UPPER aa_font16_block
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81 movwf TBLPTRU
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82 bra aa_char_99
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0
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83
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84 ; 1: SMALL font ------------------------------------------------------
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85 ; Font SMALL character folding...
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86 aa_char_1:
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604
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87 decfsz WREG ; requested small font?
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88 bra aa_char_2 ; NO
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89 movlw LOW aa_font28_block
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90 movwf TBLPTRL
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91 movlw HIGH aa_font28_block
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92 movwf TBLPTRH
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93 movlw UPPER aa_font28_block
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94 movwf TBLPTRU
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95 bra aa_char_99
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0
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96
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97 ; 2: STD font --------------------------------------------------------
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98 ; Font STANDARD character folding...
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99 aa_char_2:
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604
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100 decfsz WREG ; requested std font?
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101 bra aa_char_3 ; NO
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102 movlw LOW aa_font34_block
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103 movwf TBLPTRL
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104 movlw HIGH aa_font34_block
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105 movwf TBLPTRH
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106 movlw UPPER aa_font34_block
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107 movwf TBLPTRU
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108 bra aa_char_99
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0
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109
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110 ; 3: MEDIUM font -----------------------------------------------------
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0
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111 aa_char_3:
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604
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112 decfsz WREG ; requested medium font?
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113 bra aa_char_4 ; NO
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114 movlw LOW aa_font48_block
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115 movwf TBLPTRL
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116 movlw HIGH aa_font48_block
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117 movwf TBLPTRH
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118 movlw UPPER aa_font48_block
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119 movwf TBLPTRU
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120 bra aa_char_99
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0
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121
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122 ; 4: LARGE font ------------------------------------------------------
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0
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123 aa_char_4:
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124 IFDEF _huge_font
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125 decfsz WREG ; requested large font?
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126 bra aa_char_5 ; NO
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127 ENDIF
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128 movlw LOW aa_font90_block
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129 movwf TBLPTRL
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130 movlw HIGH aa_font90_block
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131 movwf TBLPTRH
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132 movlw UPPER aa_font90_block
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133 movwf TBLPTRU
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134 bra aa_char_99
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135
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136 IFDEF _huge_font
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137 ; 5: XTRA LARGE font -------------------------------------------------
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138 aa_char_5:
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139 movlw LOW aa_font92_block
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140 movwf TBLPTRL
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141 movlw HIGH aa_font92_block
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142 movwf TBLPTRH
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143 movlw UPPER aa_font92_block
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144 movwf TBLPTRU
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145 ENDIF
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0
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146
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147 ; Execute font block -------------------------------------------------
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148 aa_char_99:
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149 ; This is safe if all fonts are in the same code segment
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150 ; (and that segment does not span the 64K edge...)
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151 movlw UPPER aa_font16_block
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152 movwf TBLPTRU
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153
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154 ; Proceed to character substitutions
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0
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155 aa_char_30:
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604
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156 tblrd*+ ; read FROM char
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157 movf TABLAT,W ; get it, and set Z,N
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158 bz aa_char_32 ; branch if end of translation table reached
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0
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159
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604
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160 tblrd*+ ; read TO char
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161 cpfseq PRODL ; FROM == current char ?
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162 bra aa_char_30 ; different -> loop
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163 movff TABLAT, PRODL ; make substitution
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604
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164 bra aa_char_30 ; loop
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0
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165
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166 ; Make sure char is in the available range
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167 aa_char_32:
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168 tblrd*+ ; read first char
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169 movf TABLAT,W ; get it
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170 subwf PRODL,F ; (char - first) --> PRODL
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604
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171 tblrd*+ ; read nb chars
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172 movf TABLAT,W ; nbchars --> WREG
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604
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173 tblrd*+ ; read default char
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174 cpfslt PRODL ; char > WREG ?
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175 movff TABLAT,PRODL ; replace PRODL
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0
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176
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177 ; Decode font height and anti-aliasing mode
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178 bcf aa_antialias ; default to no AA
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179 tblrd*+ ; read font height + AA flag
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180 movf TABLAT,W ; into WREG
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604
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181 bnn aa_char_34 ; high bit set ?
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182 bsf aa_antialias ; YES - then the font is AA
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0
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183 aa_char_34:
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604
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184 andlw 0x7F ; keep just font height,
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185 movwf win_height ; then save it (its a register)
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0
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186
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187 ; Set PROM pointer to the char index
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604
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188 movf PRODL,W ; read back char
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189 mullw 2 ; PROD = 2*(char - base), TBLPTR=idx
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190 movf PRODL,W
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191 addwf TBLPTRL,F ; add into TBLPTR (low byte)
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192 movf PRODH,W
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193 addwfc TBLPTRH,F ; and high byte
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0
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194
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195 ; Read start and stop pointers
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196 tblrd*+ ; aa_start = PROM16(*tblptr++)
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197 movff TABLAT,aa_start+0 ; read low byte
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198 tblrd*+
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199 movff TABLAT,aa_start+1 ; and high byte
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0
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200
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201 tblrd*+ ; aa_end = PROM16(*tblptr++)
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202 movff TABLAT,aa_end+0 ; read low byte
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203 tblrd*+
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204 movff TABLAT,aa_end+1 ; and high byte
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0
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205
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206 return
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207
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208
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209 ;------------------------------------------------------------------------------
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210 ; Character width
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211 ; Input aa_start, aa_end, win_width, win_height, AA_flags
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212 ; Output width added to win_width
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213 ; Trashed aa_bitlen, TBLPTR, TABLAT
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0
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214 ;
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215 aa_char_width:
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216 movff aa_start+0, TBLPTRL ; TBLPTR = aa_start
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217 movff aa_start+1, TBLPTRH
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218 clrf aa_bitlen ; clear reminders...
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0
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219
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604
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220 ; Read bitmap byte, and decode length:
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0
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221 aa_char_width_1:
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222
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223 ifdef AA_BYTE_SWAP
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604
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224 btg TBLPTRL ; toggle low ptr bit
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0
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225 tblrd*
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226 movf TABLAT,W ; store to WREG
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227 btg TBLPTRL ; get is back
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228 tblrd*+ ; then increment (but trash TABLAT)
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604
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229 movwf TABLAT ; then restore copy to TABLAT
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230 else
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604
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231 tblrd*+ ; normal read...
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232 movf TABLAT,W ; store copy to WREG
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233 endif
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234
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604
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235 btfss aa_antialias ; anti-aliased font ?
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236 bra aa_char_width_10 ; NO - always 7 bit count
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0
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237
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604
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238 bn aa_char_width_10 ; none-white pixels?
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239 andlw 0x1F ; YES - 5 bit count
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0
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240 aa_char_width_10:
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604
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241 andlw 0x7F ; NO - 7 bit count
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242 incf WREG ; WREG = repetition count
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604
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243 addwf aa_bitlen,F ; add remaining pixels from last code
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244
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245 movf win_height,W ; WREG -= height
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246 negf WREG
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0
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247
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248 ; This is a hand-made division by successive subtraction of height
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0
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249 aa_char_width_2:
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604
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250 addwf aa_bitlen,F ; try to subtract win_height
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251 bn aa_char_width_3 ; if neg it was a bad idea...
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0
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252
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604
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253 infsnz win_width+0,F ; succeeded: do a 16 bit increment
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254 incf win_width+1,F ; on the win_width counter
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255 bra aa_char_width_2 ; and loop
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0
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256
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257 aa_char_width_3:
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258 negf WREG ; WREG = +height
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604
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259 addwf aa_bitlen,F ; restore true reminder
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0
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260
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261 ; Are we done ?
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604
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262 movf TBLPTRL,W ; compare TBLPTR to aa_end
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263 cpfseq aa_end+0
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604
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264 bra aa_char_width_1 ; loop if LOW is different
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265 movf TBLPTRH,W
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604
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266 cpfseq aa_end+1 ; loop to if HIGH is different
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267 bra aa_char_width_1
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268 return
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0
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269
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270
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0
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271 ;------------------------------------------------------------------------------
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272 ; String width
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273 ; Input buffer (SHOULD BE NULL TERMINATED)
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274 ; Output win_width, win_height
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623
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275 ; Trashed PROD, TBLPTR, FSR2, aa_bitlen, aa_start, aa_end, AA_flags
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0
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276 ;
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277 aa_string_width:
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278 lfsr FSR2, buffer ; FSR2 pointer to start of string
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604
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279 clrf win_width+0 ; clear width sum
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582
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280 clrf win_width+1 ; (16 bit counter)
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0
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281
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282 aa_string_width_1:
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283 movf POSTINC2,W ; WREG = *FSR2++
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604
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284 bz aa_string_width99 ; exit if null byte encountered
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0
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285
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286 rcall aa_char_setup ; setup aa_start / aa_end
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287 rcall aa_char_width ; sum-up width into win_width
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288 bra aa_string_width_1 ; and loop
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0
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289
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290 aa_string_width99:
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291 return
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0
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292
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293
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294 ;------------------------------------------------------------------------------
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623
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295 ; Decode a compressed char
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296 ; Input aa_start, aa_end, win_height, win_invert, win_color1, win_color2
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582
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297 ; Output none
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623
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298 ; Trashed TBLPTR, TABLAT, PROD, aa_bitlen, AA_flags, aa_colorDir:2
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0
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299 ;
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300 aa_decode_char:
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301 movff aa_start+0, TBLPTRL ; TBLPTR = aa_start
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302 movff aa_start+1, TBLPTRH
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0
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303
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582
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304 ; Read bitmap byte, and decode color & length
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0
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305 aa_decode_1:
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582
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306
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307 ifdef AA_BYTE_SWAP
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604
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308 btg TBLPTRL ; toggle low ptr bit
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0
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309 tblrd*
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604
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310 movf TABLAT,W ; store to WREG
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311 btg TBLPTRL ; get is back
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312 tblrd*+ ; then increment (but trash TABLAT)
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604
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313 movwf TABLAT ; then restore copy to TABLAT
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314 else
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604
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315 tblrd*+ ; normal read...
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316 movf TABLAT,W ; store copy to WREG
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582
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317 endif
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0
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318
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604
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319 btfss aa_antialias ; anti-aliased font?
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320 bra aa_decode_10 ; NO - always 7 bit count
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321 bn aa_decode_10 ; none-white pixels?
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322 andlw 0x1F ; Yes - 5 bit count
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582
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323 aa_decode_10:
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604
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324 andlw 0x7F ; NO - 7 bit count
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582
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325 incf WREG
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326 movwf aa_bitlen ; repetition count --> aa_bitlen
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0
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327
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582
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328 ;---- COLOR DECODING -------------------------------------------------
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329 ;
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330 ; Code Normal Inverse
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604
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331 ; 1xx 0% 100% : Managed by aa_decode_13
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582
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332 ; 011 25% 75%
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333 ; 010 50% 50%
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334 ; 001 75% 25%
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604
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335 ; 000 100% 0% : Managed by aa_decode_13, too
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336 ;
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604
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337 movf TABLAT,W ; get back code
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338 btfss aa_antialias ; anti-aliased font?
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339 bra aa_decode_13 ; NO - 1 bit case
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0
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340
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582
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341 ; Asymmetry test: 1xx code is another case for 1bit color.
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342 ; This have to be done before inverse video, because
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604
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343 ; of the asymmetric processing!
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344 bn aa_decode_13 ; decode as none-aa
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0
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345
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582
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346 ; Manage 000 special case too:
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623
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347 andlw 0xE0 ; select color bits, is it a 000 ?
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348 bz aa_decode_13 ; YES
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582
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349
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350 ; Apply reverse video, in a reversed way
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604
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351 btfss win_invert ; inverse video mode?
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352 sublw 0x80 ; NO
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0
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353
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623
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354 ; Extract color quarter and color half information
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355 bsf aa_antialias ; set AA mode
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356 bcf aa_color_quarter ; default to no color quarter
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357 btfsc WREG,5 ; color quarter encoded?
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358 bsf aa_color_quarter ; YES - set flag
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359 bcf aa_color_half ; default to no color half
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360 btfsc WREG,6 ; color half encoded?
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361 bsf aa_color_half ; YES - set flag
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0
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362
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582
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363 ;---- 2 bit x RGB(16bits) computation --------------------------------
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604
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364 clrf PRODL ; we will accumulate result here...
|
|
582
|
365 clrf PRODH
|
|
0
|
366
|
|
582
|
367 ; Take color div 2 into aa_temp. Max red = 15/31
|
|
604
|
368 rrcf win_color1,W ; xRRRRxGG
|
|
582
|
369 andlw b'01111011' ; 0RRRR0GG (don't change C)
|
|
|
370 movwf aa_temp+0
|
|
604
|
371 rrcf win_color2,W ; GGGxBBBB
|
|
582
|
372 andlw b'11101111' ; GGG0BBBB
|
|
|
373 movwf aa_temp+1
|
|
0
|
374
|
|
582
|
375 btfss aa_color_half
|
|
|
376 bra aa_decode_12
|
|
0
|
377
|
|
604
|
378 movff aa_temp+0,PRODH ; add color/2 if bit set
|
|
582
|
379 movff aa_temp+1,PRODL ; TFT is big endian, so swap here
|
|
0
|
380 aa_decode_12:
|
|
623
|
381 btfss aa_color_quarter
|
|
582
|
382 bra aa_decode_3
|
|
0
|
383
|
|
582
|
384 ; Divide it once again by 2. Max red = 7/31.
|
|
|
385 rrcf aa_temp+0,W ; xxRRRxxG
|
|
|
386 andlw b'00111001' ; 00RRR00G (don't change C)
|
|
|
387 movwf aa_temp+0
|
|
|
388 rrcf aa_temp+1,W ; GGGxxBBB
|
|
|
389 andlw b'11100111' ; GGG00BBB
|
|
|
390 movwf aa_temp+1
|
|
0
|
391
|
|
604
|
392 movf aa_temp+1,W ; add color/4
|
|
582
|
393 addwf PRODL,F ; NOTE: 7/31+15/31=22/31,
|
|
|
394 movf aa_temp+0,W ; hence components won't overlap
|
|
604
|
395 addwfc PRODH,F ; in right order, to propagate carry
|
|
0
|
396
|
|
623
|
397 aa_decode_12b:
|
|
|
398 btfss screen_type2 ; display 2?
|
|
|
399 bra aa_decode_3 ; NO - done
|
|
608
|
400
|
|
623
|
401 call convert_for_display2 ; convert 16 bit RGB b'RRRRRGGG GGGBBBBB' into 24 bit RGB b'RRRRRR00 GGGGGG00 BBBBBB00'
|
|
608
|
402
|
|
623
|
403 bra aa_decode_3 ; done
|
|
0
|
404
|
|
623
|
405 ; ---- Simple BLACK and WHITE cases ------------------------------
|
|
|
406 aa_decode_13: ; got a 1xx or a 000 code...
|
|
|
407 btfsc win_invert ; inverse video mode ?
|
|
|
408 xorlw 0x80 ; YES - invert levels
|
|
|
409 bn aa_decode_2 ; then test high bit
|
|
0
|
410
|
|
623
|
411 ; WHITE pixel (i.e. full color)
|
|
|
412 movff win_color1,PRODH ; current draw color
|
|
|
413 movff win_color2,PRODL ; remark: DISPLAY is big endian
|
|
|
414 bra aa_decode_12b
|
|
0
|
415
|
|
|
416 aa_decode_2:
|
|
623
|
417 clrf PRODH ; BLACK pixel
|
|
|
418 clrf PRODL
|
|
|
419 clrf win_color5
|
|
|
420 clrf win_color4
|
|
|
421 clrf win_color3
|
|
0
|
422
|
|
|
423 aa_decode_3:
|
|
623
|
424 ;---- PIXEL WRITE LOOP -----------------------------------------------
|
|
|
425 bsf tft_rs ; Data!
|
|
608
|
426
|
|
623
|
427 btfsc screen_type2 ; display 2 ?
|
|
|
428 bra aa_decode_3_display2 ; YES
|
|
582
|
429
|
|
623
|
430 movff PRODH,PORTA ; move high byte to PORTA
|
|
|
431 movff PRODL,PORTH ; move low byte to PORTH
|
|
608
|
432 aa_decode_3_display0and1:
|
|
623
|
433 bcf tft_nwr
|
|
|
434 bsf tft_nwr ; tick
|
|
582
|
435 decf aa_bitlen,F
|
|
623
|
436 bnz aa_decode_3_display0and1
|
|
|
437 bra aa_decode_3_done
|
|
0
|
438
|
|
608
|
439 aa_decode_3_display2:
|
|
623
|
440 movff win_color5,PORTH ; move high byte to PORTH (DISPLAY is big endian)
|
|
|
441 bcf tft_nwr
|
|
|
442 bsf tft_nwr ; tick
|
|
|
443 movff win_color4,PORTH ; move low byte to PORTH
|
|
|
444 bcf tft_nwr
|
|
|
445 bsf tft_nwr ; tick
|
|
|
446 movff win_color3,PORTH ; move low(est) byte to PORTH
|
|
|
447 bcf tft_nwr
|
|
|
448 bsf tft_nwr ; tick
|
|
608
|
449 decf aa_bitlen,F
|
|
623
|
450 bnz aa_decode_3_display2
|
|
|
451
|
|
608
|
452 aa_decode_3_done:
|
|
623
|
453 ;---- BYTE-CODE LOOP -------------------------------------------------
|
|
|
454 ; are we done ?
|
|
|
455 movf TBLPTRL,W ; compare TBLPTR with aa_end
|
|
|
456 cpfseq aa_end+0
|
|
|
457 bra aa_decode_1 ; loop if LOW is different
|
|
|
458 movf TBLPTRH,W
|
|
|
459 cpfseq aa_end+1 ; loop to if HIGH is different
|
|
|
460 bra aa_decode_1
|
|
|
461 return
|
|
|
462
|
|
0
|
463
|
|
|
464 ;------------------------------------------------------------------------------
|
|
|
465 ; Setup pointers for a char:
|
|
623
|
466 ; Inputs : buffer : string to print (NULL TERMINATED)
|
|
|
467 ; Output : TFT commands on port D + clocks
|
|
|
468 ;
|
|
604
|
469 global aa_wordprocessor ; callable from C-code
|
|
0
|
470 aa_wordprocessor:
|
|
604
|
471 rcall aa_string_width ; set win_height, compute win_width:2
|
|
|
472 call TFT_box_write ; use that for the box
|
|
0
|
473
|
|
582
|
474 ; Restart the loop for each char to print
|
|
623
|
475 lfsr FSR2, buffer ; FSR2 points to the start of the string
|
|
0
|
476
|
|
582
|
477 ; DATA block command
|
|
604
|
478 Index_out 0x22 ; index_out is a macro defined in tft.inc
|
|
0
|
479
|
|
|
480 aa_wordprocessor_1:
|
|
623
|
481 movf POSTINC2,W ; WREG = *FSR2++
|
|
604
|
482 bz aa_wordprocessor_99 ; exit if null byte encountered
|
|
0
|
483
|
|
582
|
484 rcall aa_char_setup ; setup aa_start / aa_end
|
|
|
485 rcall aa_decode_char ; write pixels to screen
|
|
|
486 bra aa_wordprocessor_1 ; and loop
|
|
0
|
487
|
|
|
488 aa_wordprocessor_99:
|
|
582
|
489 ; END of bloc command
|
|
|
490 Index_out 0x00
|
|
|
491 return
|
|
0
|
492
|
|
582
|
493 END
|
