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1 ;=============================================================================
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2 ;
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3 ; File aa_wordprocessor.asm ## V2.99e
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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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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=medium, 3=large)
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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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38 ; PRODH, PRODL needed for array indexing)
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39 ; FSRx 12bits. Useful as RAM pointers.
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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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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_font36_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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608
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51 extern convert_for_display2
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52
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53 aa_word CODE
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54
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55 ;------------------------------------------------------------------------------
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56 ; Setup pointers for a char:
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57 ; Inputs WREG = char to draw, win_font
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58 ; Output aa_start, aa_end, win_height, aa_flags
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59 ; Trashed PRODH, PRODL, TBLPTR, TABLAT
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0
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60 ;
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61
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0
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62 aa_char_setup:
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63 movwf PRODL ; save char into PROD for now
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64 movf win_font,W ; get font number (updates Z flag)
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65 bnz aa_char_1
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0
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66
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67 ; TINY font ---------------------------------------------------------
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68 ; Font TINY character folding...
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0
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69 aa_char_0:
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70 movlw LOW aa_font16_block
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71 movwf TBLPTRL
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72 movlw HIGH aa_font16_block
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73 movwf TBLPTRH
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74 movlw UPPER aa_font16_block
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75 movwf TBLPTRU
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76 bra aa_char_99
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0
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77
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78 ; SMALL font ---------------------------------------------------------
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79 ; Font SMALL character folding...
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80 aa_char_1:
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604
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81 decfsz WREG ; requested small font?
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82 bra aa_char_2 ; NO
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83 movlw LOW aa_font28_block
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84 movwf TBLPTRL
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85 movlw HIGH aa_font28_block
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86 movwf TBLPTRH
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87 movlw UPPER aa_font28_block
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88 movwf TBLPTRU
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89 bra aa_char_99
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0
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90
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91 ; STD font -----------------------------------------------------------
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92 ; Font SMALL character folding...
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93 aa_char_2:
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94 decfsz WREG ; requested std font?
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95 bra aa_char_3 ; NO
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96 movlw LOW aa_font36_block
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97 movwf TBLPTRL
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98 movlw HIGH aa_font36_block
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99 movwf TBLPTRH
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100 movlw UPPER aa_font36_block
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101 movwf TBLPTRU
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102 bra aa_char_99
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0
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103
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104 ; MEDIUM font --------------------------------------------------------
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0
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105 aa_char_3:
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604
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106 decfsz WREG ; requested medium font?
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107 bra aa_char_4 ; NO
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108 movlw LOW aa_font48_block
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109 movwf TBLPTRL
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110 movlw HIGH aa_font48_block
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111 movwf TBLPTRH
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112 movlw UPPER aa_font48_block
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113 movwf TBLPTRU
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114 bra aa_char_99
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0
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115
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116 ; LARGE font ---------------------------------------------------------
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0
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117 aa_char_4:
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118 ; no to all above - must be large font then...
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119 movlw LOW aa_font90_block
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120 movwf TBLPTRL
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121 movlw HIGH aa_font90_block
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122 movwf TBLPTRH
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123 movlw UPPER aa_font90_block
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124 movwf TBLPTRU
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0
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125
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126 ; Execute font block -------------------------------------------------
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127 aa_char_99:
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128 ; This is safe if the three fonts are in the same code segment
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129 ; (and that segment do not span the 64K edge...)
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130 movlw UPPER aa_font16_block
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131 movwf TBLPTRU
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132
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133 ; Proceed to character substitutions
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0
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134 aa_char_30:
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135 tblrd*+ ; read FROM char
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136 movf TABLAT,W ; get it, and set Z,N
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137 bz aa_char_32 ; break at end of translations
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0
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138
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139 tblrd*+ ; read TO char
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140 cpfseq PRODL ; FROM == current char ?
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141 bra aa_char_30 ; different -> loop
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142 movff TABLAT, PRODL ; make substitution
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143 bra aa_char_30 ; loop
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144
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145 ; Make sure char is in the available range
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146 aa_char_32:
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147 tblrd*+ ; read first char
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148 movf TABLAT,W ; get it
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149 subwf PRODL,F ; (char - first) --> PRODL
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150 tblrd*+ ; read nb chars
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151 movf TABLAT,W ; nbchars --> WREG
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152 tblrd*+ ; read default char
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153 cpfslt PRODL ; char > WREG ?
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154 movff TABLAT,PRODL ; replace PRODL
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0
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155
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156 ; Decode font height and anti-aliasing mode
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157 clrf aa_flags ; default to no AA
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158 tblrd*+ ; read font height + AA flag
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159 movf TABLAT,W ; into WREG
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160 bnn aa_char_34 ; high bit set ?
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161 bsf aa_antialias ; YES - then the font is AA
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162 aa_char_34:
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163 andlw 0x7F ; keep just font height,
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164 movwf win_height ; then save it (its a register)
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0
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165
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166 ; Set PROM pointer to the char index
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167 movf PRODL,W ; read back char
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168 mullw 2 ; PROD = 2*(char - base), TBLPTR=idx
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169 movf PRODL,W
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170 addwf TBLPTRL,F ; add into TBLPTR (low byte)
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171 movf PRODH,W
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172 addwfc TBLPTRH,F ; and high byte
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173
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174 ; Read start and stop pointers
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175 tblrd*+ ; aa_start = PROM16(*tblptr++)
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176 movff TABLAT,aa_start+0 ; read low byte
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177 tblrd*+
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178 movff TABLAT,aa_start+1 ; and high byte
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179
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180 tblrd*+ ; aa_end = PROM16(*tblptr++)
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181 movff TABLAT,aa_end+0 ; read low byte
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182 tblrd*+
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183 movff TABLAT,aa_end+1 ; and high byte
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0
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184
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185 return
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0
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186
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187 ;------------------------------------------------------------------------------
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188 ; Character width
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189 ; Inputs aa_start, aa_end, win_width, win_height, aa_flags
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190 ; Output width added to win_width
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191 ; Trashed aa_bitlen, TBLPTR, TABLAT
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192 ;
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193 aa_char_width:
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194 movff aa_start+0, TBLPTRL ; TBLPTR = aa_start
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195 movff aa_start+1, TBLPTRH
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196 clrf aa_bitlen ; clear reminders...
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0
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197
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198 ; Read bitmap byte, and decode length:
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0
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199 aa_char_width_1:
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200
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201 ifdef AA_BYTE_SWAP
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202 btg TBLPTRL ; toggle low ptr bit
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0
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203 tblrd*
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204 movf TABLAT,W ; store to WREG
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205 btg TBLPTRL ; get is back
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206 tblrd*+ ; then increment (but trash TABLAT)
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207 movwf TABLAT ; then restore copy to TABLAT
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208 else
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209 tblrd*+ ; normal read...
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210 movf TABLAT,W ; store copy to WREG
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211 endif
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212
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213 btfss aa_antialias ; anti-aliased font ?
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214 bra aa_char_width_10 ; NO - always 7 bit count
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0
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215
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216 bn aa_char_width_10 ; none-white pixels?
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217 andlw 0x1F ; YES - 5 bit count
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0
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218 aa_char_width_10:
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219 andlw 0x7F ; NO - 7 bit count
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220 incf WREG ; WREG = repetition count
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221 addwf aa_bitlen,F ; add remaining pixels from last code
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222
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223 movf win_height,W ; WREG -= height
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224 negf WREG
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225
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226 ; This is a hand-made division by successive subtraction of height
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0
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227 aa_char_width_2:
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228 addwf aa_bitlen,F ; try to subtract win_height
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229 bn aa_char_width_3 ; if neg it was a bad idea...
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0
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230
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231 infsnz win_width+0,F ; succeeded: do a 16 bit increment
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232 incf win_width+1,F ; on the win_width counter
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233 bra aa_char_width_2 ; and loop
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0
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234
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235 aa_char_width_3:
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236 negf WREG ; WREG = +height
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237 addwf aa_bitlen,F ; restore true reminder
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0
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238
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239 ; Are we done ?
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604
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240 movf TBLPTRL,W ; compare TBLPTR to aa_end
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241 cpfseq aa_end+0
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604
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242 bra aa_char_width_1 ; loop if LOW is different
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243 movf TBLPTRH,W
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604
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244 cpfseq aa_end+1 ; loop to if HIGH is different
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245 bra aa_char_width_1
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246 return
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0
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247
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248 ;------------------------------------------------------------------------------
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249 ; String width
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250 ; Inputs buffer (SHOULD BE NULL TERMINATED)
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251 ; Output win_width, win_height
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252 ; Trashed PROD, TBLPTR, FSR2, aa_bitlen, aa_start, aa_end, aa_flags
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0
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253 ;
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254 aa_string_width:
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255 lfsr FSR2, buffer ; FSR2 pointer to start of string
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604
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256 clrf win_width+0 ; clear width sum
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257 clrf win_width+1 ; (16 bit counter)
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0
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258
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259 aa_string_width_1:
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260 movf POSTINC2,W ; WREG = *FSR2++
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604
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261 bz aa_string_width99 ; exit if null byte encountered
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0
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262
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263 rcall aa_char_setup ; setup aa_start / aa_end
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264 rcall aa_char_width ; sum-up width into win_width
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265 bra aa_string_width_1 ; and loop
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0
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266
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267 aa_string_width99:
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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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271 ; Decode a compressed char.
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272 ; Inputs aa_start, aa_end, win_height, win_invert, win_color1, win_color2
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273 ; Output none
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274 ; Trashed TBLPTR, TABLAT, PROD, aa_bitlen, aa_flags, aa_colorDir:2
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0
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275 ;
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276 aa_decode_char:
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277 movff aa_start+0, TBLPTRL ; TBLPTR = aa_start
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278 movff aa_start+1, TBLPTRH
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0
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279
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280 ; Read bitmap byte, and decode color & length
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0
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281 aa_decode_1:
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282
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283 ifdef AA_BYTE_SWAP
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604
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284 btg TBLPTRL ; toggle low ptr bit
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0
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285 tblrd*
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604
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286 movf TABLAT,W ; store to WREG
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287 btg TBLPTRL ; get is back
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288 tblrd*+ ; then increment (but trash TABLAT)
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289 movwf TABLAT ; then restore copy to TABLAT
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290 else
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291 tblrd*+ ; normal read...
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292 movf TABLAT,W ; store copy to WREG
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293 endif
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0
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294
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604
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295 btfss aa_antialias ; anti-aliased font?
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296 bra aa_decode_10 ; NO - always 7 bit count
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297 bn aa_decode_10 ; none-white pixels?
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298 andlw 0x1F ; Yes - 5 bit count
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299 aa_decode_10:
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604
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300 andlw 0x7F ; NO - 7 bit count
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301 incf WREG
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302 movwf aa_bitlen ; repetition count --> aa_bitlen
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0
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303
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582
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304 ;---- COLOR DECODING -------------------------------------------------
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305 ;
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306 ; Code Normal Inverse
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604
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307 ; 1xx 0% 100% : Managed by aa_decode_13
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308 ; 011 25% 75%
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309 ; 010 50% 50%
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310 ; 001 75% 25%
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311 ; 000 100% 0% : Managed by aa_decode_13, too
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312 ;
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604
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313 movf TABLAT,W ; get back code
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314 btfss aa_antialias ; anti-aliased font?
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315 bra aa_decode_13 ; NO - 1 bit case
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0
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316
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582
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317 ; Asymmetry test: 1xx code is another case for 1bit color.
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318 ; This have to be done before inverse video, because
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319 ; of the asymmetric processing!
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320 bn aa_decode_13 ; decode as none-aa
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0
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321
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582
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322 ; Manage 000 special case too:
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604
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323 andlw 0xE0 ; select color bits
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324 bz aa_decode_13 ; that's a 000 !
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582
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325
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326 ; Apply reverse video, in a reversed way
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604
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327 btfss win_invert ; inverse video mode?
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328 sublw 0x80 ; NO
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0
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329
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582
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330 ; Move the two bits to aa_color_half and aa_color_quarter:
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331 swapf WREG ; --> 0000.0LL0 byte
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604
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332 iorlw b'001' ; we are in AA mode, don't forget it!
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582
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333 movwf aa_flags ; save that to aa_color_(half/quad)/AA flags
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0
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334
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582
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335 ;---- 2 bit x RGB(16bits) computation --------------------------------
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604
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336 clrf PRODL ; we will accumulate result here...
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582
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337 clrf PRODH
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0
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338
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582
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339 ; Take color div 2 into aa_temp. Max red = 15/31
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604
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340 rrcf win_color1,W ; xRRRRxGG
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582
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341 andlw b'01111011' ; 0RRRR0GG (don't change C)
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342 movwf aa_temp+0
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604
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343 rrcf win_color2,W ; GGGxBBBB
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582
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344 andlw b'11101111' ; GGG0BBBB
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345 movwf aa_temp+1
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0
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346
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582
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347 btfss aa_color_half
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348 bra aa_decode_12
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0
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349
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604
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350 movff aa_temp+0,PRODH ; add color/2 if bit set
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582
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351 movff aa_temp+1,PRODL ; TFT is big endian, so swap here
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0
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352 aa_decode_12:
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582
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353 btfss aa_color_quart
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354 bra aa_decode_3
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0
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355
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582
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356 ; Divide it once again by 2. Max red = 7/31.
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357 rrcf aa_temp+0,W ; xxRRRxxG
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358 andlw b'00111001' ; 00RRR00G (don't change C)
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359 movwf aa_temp+0
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360 rrcf aa_temp+1,W ; GGGxxBBB
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361 andlw b'11100111' ; GGG00BBB
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362 movwf aa_temp+1
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0
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363
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604
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364 movf aa_temp+1,W ; add color/4
|
|
582
|
365 addwf PRODL,F ; NOTE: 7/31+15/31=22/31,
|
|
|
366 movf aa_temp+0,W ; hence components won't overlap
|
|
604
|
367 addwfc PRODH,F ; in right order, to propagate carry
|
|
0
|
368
|
|
608
|
369 aa_decode_12b:
|
|
|
370 btfss screen_type2 ; Display 2?
|
|
|
371 bra aa_decode_3 ; No, Done.
|
|
|
372
|
|
|
373 call convert_for_display2 ; Convert 16Bit RGB b'RRRRRGGG GGGBBBBB' into 24Bit RGB b'RRRRRR00 GGGGGG00 BBBBBB00'
|
|
|
374
|
|
|
375 bra aa_decode_3 ; Done.
|
|
0
|
376
|
|
608
|
377 ; ---- Simple BLACK and WHITE cases ------------------------------
|
|
|
378 aa_decode_13: ; Got a 1xx or a 000 code...
|
|
|
379 btfsc win_invert ; Inverse video mode ?
|
|
|
380 xorlw 0x80 ; YES: invert levels.
|
|
|
381 bn aa_decode_2 ; Then test high bit.
|
|
0
|
382
|
|
608
|
383 ; WHITE pixel (ie. full color)
|
|
|
384 movff win_color1,PRODH ; current draw color
|
|
|
385 movff win_color2,PRODL ; (rem: DISPLAY is big endian)
|
|
|
386 bra aa_decode_12b
|
|
0
|
387
|
|
|
388 aa_decode_2:
|
|
608
|
389 clrf PRODH ; BLACK pixel
|
|
|
390 clrf PRODL
|
|
|
391 clrf win_color5
|
|
|
392 clrf win_color4
|
|
|
393 clrf win_color3
|
|
0
|
394
|
|
|
395 aa_decode_3:
|
|
608
|
396 ;---- PIXEL WRITE LOOP -----------------------------------------------
|
|
|
397 bsf tft_rs ; Data!
|
|
|
398
|
|
|
399 btfsc screen_type2 ; Display 2?
|
|
|
400 bra aa_decode_3_display2 ; Yes
|
|
582
|
401
|
|
608
|
402 movff PRODH,PORTA ; Move high byte to PORTA
|
|
|
403 movff PRODL,PORTH ; Move low byte to PORTH
|
|
|
404 aa_decode_3_display0and1:
|
|
|
405 bcf tft_nwr
|
|
|
406 bsf tft_nwr ; Tick
|
|
582
|
407 decf aa_bitlen,F
|
|
608
|
408 bnz aa_decode_3_display0and1
|
|
|
409 bra aa_decode_3_done
|
|
0
|
410
|
|
608
|
411 aa_decode_3_display2:
|
|
|
412 movff win_color5,PORTH ; Move high byte to PORTH (DISPLAY is bigendian)
|
|
|
413 bcf tft_nwr
|
|
|
414 bsf tft_nwr ; Tick
|
|
|
415 movff win_color4,PORTH ; Move low byte to PORTH
|
|
|
416 bcf tft_nwr
|
|
|
417 bsf tft_nwr ; Tick
|
|
|
418 movff win_color3,PORTH ; Move low(est) byte to PORTH
|
|
|
419 bcf tft_nwr
|
|
|
420 bsf tft_nwr ; Tick
|
|
|
421 decf aa_bitlen,F
|
|
|
422 bnz aa_decode_3_display2
|
|
|
423
|
|
|
424 aa_decode_3_done:
|
|
|
425 ;---- BYTE-CODE LOOP -------------------------------------------------
|
|
|
426 ; Are we done ?
|
|
|
427 movf TBLPTRL,W ; Compare TBLPTR to aa_end
|
|
|
428 cpfseq aa_end+0
|
|
|
429 bra aa_decode_1 ; Loop if LOW is different
|
|
|
430 movf TBLPTRH,W
|
|
|
431 cpfseq aa_end+1 ; Loop to if HIGH is different
|
|
|
432 bra aa_decode_1
|
|
|
433 return
|
|
0
|
434
|
|
|
435 ;------------------------------------------------------------------------------
|
|
|
436 ; Setup pointers for a char:
|
|
|
437 ; Inputs : buffer : string to print (SHOULD BE NULL TERMINATED)
|
|
|
438 ; Output : TFT commands on port D + clocks.
|
|
|
439 ;
|
|
604
|
440 global aa_wordprocessor ; callable from C-code
|
|
0
|
441 aa_wordprocessor:
|
|
604
|
442 banksel win_font ; bank1, just to be sure
|
|
|
443 rcall aa_string_width ; set win_height, compute win_width:2
|
|
|
444 call TFT_box_write ; use that for the box
|
|
0
|
445
|
|
582
|
446 ; Restart the loop for each char to print
|
|
|
447 lfsr FSR2, buffer ; FSR2 pointer to start of string
|
|
0
|
448
|
|
582
|
449 ; DATA block command
|
|
604
|
450 Index_out 0x22 ; index_out is a macro defined in tft.inc
|
|
0
|
451
|
|
|
452 aa_wordprocessor_1:
|
|
582
|
453 movf POSTINC2,W ; WREG = *FSR2++
|
|
604
|
454 bz aa_wordprocessor_99 ; exit if null byte encountered
|
|
0
|
455
|
|
582
|
456 rcall aa_char_setup ; setup aa_start / aa_end
|
|
|
457 rcall aa_decode_char ; write pixels to screen
|
|
|
458 bra aa_wordprocessor_1 ; and loop
|
|
0
|
459
|
|
|
460 aa_wordprocessor_99:
|
|
582
|
461 ; END of bloc command
|
|
|
462 Index_out 0x00
|
|
|
463 return
|
|
0
|
464
|
|
582
|
465 END
|
