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Rev | Author | Line No. | Line |
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129 | mikedld | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; VGA.INC ;; |
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4 | ;; ;; |
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5 | ;; 640x480 mode 0x12 VGA functions for MenuetOS ;; |
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6 | ;; ;; |
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7 | ;; Paul Butcher, paul.butcher@asa.co.uk ;; |
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8 | ;; ;; |
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9 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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10 | |||
11 | |||
12 | |||
13 | paletteVGA: |
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14 | |||
15 | ;16 colour palette |
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16 | mov dx,0x3c8 |
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17 | mov al,0 |
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18 | out dx,al |
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19 | |||
20 | mov ecx,16 |
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21 | mov dx,0x3c9 |
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22 | xor eax,eax |
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23 | |||
24 | palvganew: |
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25 | |||
26 | mov al,0 |
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27 | test ah,4 |
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28 | jz palvgalbl1 |
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29 | add al,31 |
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30 | test ah,8 |
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31 | jz palvgalbl1 |
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32 | add al,32 |
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33 | palvgalbl1: |
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34 | out dx,al ; red 0,31 or 63 |
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35 | mov al,0 |
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36 | test ah,2 |
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37 | jz palvgalbl2 |
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38 | add al,31 |
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39 | test ah,8 |
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40 | jz palvgalbl2 |
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41 | add al,32 |
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42 | palvgalbl2: |
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43 | out dx,al ; blue 0,31 or 63 |
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44 | mov al,0 |
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45 | test ah,1 |
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46 | jz palvgalbl3 |
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47 | add al,31 |
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48 | test ah,8 |
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49 | jz palvgalbl3 |
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50 | add al,32 |
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51 | palvgalbl3: |
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52 | out dx,al ; green 0,31 or 63 |
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53 | add ah,1 |
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54 | loop palvganew |
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55 | ; mov dx, 3ceh |
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56 | ; mov ax, 0005h |
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57 | ; out dx, ax |
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58 | ret |
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59 | |||
60 | palette320x200: |
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61 | |||
62 | mov edx,0x3c8 |
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63 | xor eax, eax |
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64 | out dx,al |
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65 | mov ecx,256 |
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66 | mov edx,0x3c9 |
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67 | xor eax,eax |
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68 | |||
69 | palnew: |
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70 | mov al,0 |
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71 | test ah,64 |
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72 | jz pallbl1 |
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73 | add al,21 |
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74 | pallbl1: |
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75 | test ah,128 |
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76 | jz pallbl2 |
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77 | add al,42 |
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78 | pallbl2: |
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79 | out dx,al |
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80 | mov al,0 |
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81 | test ah,8 |
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82 | jz pallbl3 |
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83 | add al,8 |
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84 | pallbl3: |
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85 | test ah,16 |
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86 | jz pallbl4 |
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87 | add al,15 |
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88 | pallbl4: |
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89 | test ah,32 |
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90 | jz pallbl5 |
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91 | add al,40 |
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92 | pallbl5: |
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93 | out dx,al |
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94 | mov al,0 |
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95 | test ah,1 |
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96 | jz pallbl6 |
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97 | add al,8 |
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98 | pallbl6: |
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99 | test ah,2 |
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100 | jz pallbl7 |
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101 | add al,15 |
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102 | pallbl7: |
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103 | test ah,4 |
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104 | jz pallbl8 |
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105 | add al,40 |
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106 | pallbl8: |
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107 | out dx,al |
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108 | add ah,1 |
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109 | loop palnew |
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110 | |||
111 | ret |
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112 | |||
113 | uglobal |
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114 | novesachecksum dd 0x0 |
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115 | EGA_counter db 0 |
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116 | VGA_drawing_screen db 0 |
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117 | VGA_8_pixels: |
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118 | rb 16 |
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119 | temp: |
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120 | .cx dd 0 |
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121 | endg |
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122 | |||
123 | checkVga_N13: |
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124 | |||
125 | cmp [0xfe0c],dword 0x13 |
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126 | jne @f |
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127 | |||
128 | ; cnvl: |
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129 | pushad |
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130 | cmp [EGA_counter],1 |
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131 | je novesal |
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132 | mov ecx,[0xfb0a] |
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133 | cmp ecx,[novesachecksum] |
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134 | jne novesal |
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135 | popad |
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136 | @@: |
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137 | ret |
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138 | |||
139 | novesal: |
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140 | mov [novesachecksum],ecx |
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141 | mov ecx,0 |
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142 | movzx eax,word [0xfb0c] |
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143 | cmp eax,100 |
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144 | jge m13l3 |
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145 | mov eax,100 |
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146 | m13l3: |
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147 | cmp eax,480-100 |
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148 | jbe m13l4 |
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149 | mov eax,480-100 |
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150 | m13l4: |
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151 | sub eax,100 |
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152 | imul eax,640*4 |
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153 | add ecx,eax |
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154 | movzx eax,word [0xfb0a] |
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155 | cmp eax,160 |
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156 | jge m13l1 |
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157 | mov eax,160 |
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158 | m13l1: |
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159 | cmp eax,640-160 |
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160 | jbe m13l2 |
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161 | mov eax,640-160 |
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162 | m13l2: |
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163 | sub eax,160 |
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164 | shl eax,2 |
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165 | add ecx,eax |
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166 | mov esi,[0xfe80] |
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167 | add esi,ecx |
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168 | mov edi,0xa0000 |
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169 | mov edx,200 |
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170 | mov ecx,320 |
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171 | cld |
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172 | m13pix: |
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173 | lodsd |
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174 | cmp eax,0 |
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175 | je .save_pixel |
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176 | push eax |
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177 | mov ebx,eax |
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178 | and eax,(128+64+32) ; blue |
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179 | shr eax,5 |
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180 | and ebx,(128+64+32)*256 ; green |
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181 | shr ebx,8+2 |
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182 | add eax,ebx |
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183 | pop ebx |
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184 | and ebx,(128+64)*256*256 ; red |
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185 | shr ebx,8+8 |
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186 | add eax,ebx |
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187 | .save_pixel: |
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188 | stosb |
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189 | loop m13pix |
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190 | mov ecx,320 |
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191 | add esi,4*(640-320) |
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192 | dec edx |
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193 | jnz m13pix |
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194 | mov [EGA_counter],0 |
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195 | popad |
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196 | ret |
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197 | |||
198 | VGA_drawbackground: |
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199 | ; draw all |
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200 | cmp [0xfe0c],dword 0x12 |
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201 | jne .end |
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202 | pushad |
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203 | mov esi,[0xfe80] |
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204 | mov edi,0xa0000 |
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205 | mov ebx,640/32 ; 640*480/(8*4) |
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206 | mov edx,480 |
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207 | @@: |
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208 | push ebx edx esi edi |
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209 | shl edx,9 |
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210 | lea edx,[edx+edx*4] |
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211 | add esi,edx |
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212 | shr edx,5 |
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213 | add edi,edx |
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214 | call VGA_draw_long_line |
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215 | pop edi esi edx ebx |
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216 | dec edx |
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217 | jnz @r |
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218 | call VGA_draw_long_line_1 |
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219 | popad |
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220 | .end: |
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221 | ret |
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222 | |||
223 | VGA_draw_long_line: |
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224 | mov dx,3ceh |
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225 | mov ax,0ff08h |
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226 | cli |
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227 | out dx, ax |
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228 | mov ax,0005h |
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229 | out dx, ax |
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230 | m12pix: |
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231 | call VGA_draw_32_pixels |
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232 | dec ebx |
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233 | jnz m12pix |
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234 | mov dx,3c4h |
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235 | mov ax,0ff02h |
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236 | out dx,ax |
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237 | mov dx,3ceh |
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238 | mov ax,0205h |
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239 | out dx,ax |
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240 | mov dx,3ceh |
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241 | mov al,08h |
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242 | out dx,al |
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243 | sti |
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244 | ret |
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245 | |||
246 | VGA_draw_32_pixels: |
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247 | xor eax,eax |
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248 | mov ebp,VGA_8_pixels |
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249 | mov [ebp],eax |
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250 | mov [ebp+4],eax |
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251 | mov [ebp+8],eax |
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252 | mov [ebp+12],eax |
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253 | mov ch,4 |
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254 | .main_loop: |
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255 | mov cl,8 |
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256 | .convert_pixels_to_VGA: |
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257 | lodsd ; eax = 24bit colour |
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258 | cmp eax,0 |
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259 | je .end |
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260 | rol eax,8 |
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261 | mov al,ch |
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262 | ror eax,8 |
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263 | mov ch,1 |
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264 | dec cl |
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265 | shl ch,cl |
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266 | cmp al,85 |
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267 | jbe .p13green |
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268 | or [ebp],ch |
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269 | cmp al,170 |
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270 | jbe .p13green |
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271 | or [ebp+12],ch |
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272 | .p13green: |
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273 | cmp ah,85 |
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274 | jbe .p13red |
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275 | or [ebp+4],ch |
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276 | cmp ah,170 |
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277 | jbe .p13red |
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278 | or [ebp+12],ch |
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279 | .p13red: |
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280 | shr eax,8 |
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281 | cmp ah,85 |
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282 | jbe .p13cont |
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283 | or [ebp+8],ch |
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284 | cmp ah,170 |
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285 | jbe .p13cont |
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286 | or [ebp+12],ch |
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287 | .p13cont: |
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288 | ror eax,8 |
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289 | mov ch,ah |
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290 | inc cl |
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291 | .end: |
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292 | dec cl |
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293 | jnz .convert_pixels_to_VGA |
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294 | inc ebp |
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295 | dec ch |
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296 | jnz .main_loop |
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297 | push esi |
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298 | sub ebp,4 |
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299 | mov esi,ebp |
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300 | mov dx, 3c4h |
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301 | mov ah, 1h |
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302 | @@: |
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303 | mov al, 02h |
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304 | out dx,ax |
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305 | xchg ax,bp |
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306 | lodsd |
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307 | mov [edi],eax |
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308 | xchg ax,bp |
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309 | shl ah, 1 |
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310 | cmp ah, 10h |
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311 | jnz @r |
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312 | add edi,4 |
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313 | pop esi |
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314 | ret |
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315 | |||
316 | VGA_putpixel: |
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317 | ; eax = x |
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318 | ; ebx = y |
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319 | mov ecx,eax |
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320 | mov eax, [esp+32-8+4] ; color |
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321 | shl ebx,9 |
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322 | lea ebx,[ebx+ebx*4] ; умножение на 5 |
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323 | lea edx, [ebx+ecx*4] ; + x*BytesPerPixel (Vesa2.0 32) |
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324 | mov edi,edx |
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325 | add edi, [0xfe80] ; + LFB address |
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326 | mov [edi], eax ; write to LFB for Vesa2.0 |
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327 | shr edx,5 ; change BytesPerPixel to 1/8 |
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328 | mov edi,edx |
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329 | add edi, 0x0a0000 ; address of pixel in VGA area |
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330 | and ecx,0x07 ; bit no. (modulo 8) |
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331 | pushfd |
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332 | ; edi = address, eax = 24bit colour, ecx = bit no. (modulo 8) |
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333 | xor edx,edx |
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334 | cmp eax,0 |
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335 | je .p13cont |
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336 | cmp al,85 |
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337 | jbe .p13green |
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338 | or dl,0x01 |
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339 | cmp al,170 |
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340 | jbe .p13green |
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341 | or dl,0x08 |
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342 | .p13green: |
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343 | cmp ah,85 |
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344 | jbe .p13red |
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345 | or dl,0x02 |
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346 | cmp ah,170 |
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347 | jbe .p13red |
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348 | or dl,0x08 |
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349 | .p13red: |
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350 | shr eax,8 |
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351 | cmp ah,85 |
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352 | jbe .p13cont |
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353 | or dl,0x04 |
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354 | cmp ah,170 |
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355 | jbe .p13cont |
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356 | or dl,0x08 |
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357 | .p13cont: |
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358 | ror edx,8 |
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359 | inc cl |
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360 | xor eax,eax |
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361 | inc ah |
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362 | shr ax,cl |
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363 | mov dx,3cfh |
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364 | cli |
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365 | out dx,al |
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366 | mov al,[edi] ; dummy read |
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367 | rol edx,8 |
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368 | mov [edi],dl |
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369 | popfd |
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370 | ;.end: |
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371 | ret |
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372 | |||
373 | VGA__putimage: |
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374 | ; ecx = size [x|y] |
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375 | ; edx = coordinates [x|y] |
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376 | cmp [0xfe0c],dword 0x12 |
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377 | jne @f |
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378 | pushad |
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379 | rol edx,16 |
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380 | movzx eax,dx |
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381 | rol edx,16 |
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382 | movzx ebx,dx |
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383 | movzx edx,cx |
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384 | rol ecx,16 |
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385 | movzx ecx,cx |
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386 | call VGA_draw_bar_1 |
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387 | popad |
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388 | @@: |
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389 | ret |
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390 | |||
391 | VGA_draw_bar: |
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392 | ; eax cx |
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393 | ; ebx cy |
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394 | ; ecx xe |
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395 | ; edx ye |
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396 | cmp [0xfe0c],dword 0x12 |
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397 | jne @f |
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398 | pushad |
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399 | sub ecx,eax |
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400 | sub edx,ebx |
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401 | and eax,0xffff |
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402 | and ebx,0xffff |
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403 | and ecx,0xffff |
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404 | and edx,0xffff |
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405 | call VGA_draw_bar_1 |
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406 | popad |
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407 | @@: |
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408 | ret |
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409 | |||
410 | VGA_draw_bar_1: |
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411 | mov [temp.cx],eax |
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412 | mov eax, [0x3010] |
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413 | add ebx, [eax-twdw + 4] |
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414 | mov eax, [eax-twdw + 0] |
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415 | add eax, [temp.cx] |
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416 | and eax,0xfff8 |
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417 | shl ebx,9 |
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418 | lea ebx,[ebx+ebx*4] ; умножение на 5 |
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419 | lea ebx, [ebx+eax*4] ; + x*BytesPerPixel (Vesa2.0 32) |
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420 | mov esi,ebx |
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421 | add esi, [0xfe80] ; + LFB address |
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422 | shr ebx,5 ; change BytesPerPixel to 1/8 |
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423 | mov edi,ebx |
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424 | add edi, 0x0a0000 ; address of pixel in VGA area |
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425 | mov ebx,ecx |
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426 | shr ebx,5 |
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427 | inc ebx |
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428 | .main_loop: |
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429 | call VGA_draw_long_line_1 |
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430 | dec edx |
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431 | jnz .main_loop |
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432 | call VGA_draw_long_line_1 |
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433 | ret |
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434 | |||
435 | VGA_draw_long_line_1: |
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436 | push ebx edx esi edi |
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437 | shl edx,9 |
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438 | lea edx,[edx+edx*4] |
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439 | add esi,edx |
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440 | shr edx,5 |
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441 | add edi,edx |
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442 | call VGA_draw_long_line |
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443 | pop edi esi edx ebx |
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444 | ret |
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445 |