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Rev | Author | Line No. | Line |
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1778 | yogev_ezra | 1 | ;"Web" demo for KolibriOS, version 0.3 |
2 | ;Copyright Alexander Meshcheryakov (Self-Perfection), 2009 |
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3 | ;Contact me: alexander.s.m@gmail.com |
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4 | ;distributed under BSD license |
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5 | |||
6 | ;Used assumptions: |
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7 | ; 1) Screen resolution does not change while app is running |
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8 | ; 2) Screen width bigger than height |
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9 | ; 3) Screen width and height are even (2*k) |
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10 | |||
9451 | leency | 11 | use32 |
12 | org 0 |
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13 | db 'MENUET01' |
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14 | dd 0x01,__start,__end,__memory,__stack,param,0 |
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15 | |||
1796 | yogev_ezra | 16 | include '../../../macros.inc' |
1778 | yogev_ezra | 17 | |
18 | background_cl = 0x000000 |
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19 | foreground_cl = 0xFFFFFF |
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20 | |||
21 | delay = 4 |
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22 | |||
23 | ; debug = 1 |
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24 | |||
9451 | leency | 25 | ;KOS_APP_START |
1778 | yogev_ezra | 26 | |
27 | CODE |
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9469 | leency | 28 | ;Check if the app is running in screensaver mode or not |
9451 | leency | 29 | cmp dword [param], '@ss' |
30 | setz [screensaver] |
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31 | mov ebx, EVM_REDRAW + EVM_KEY + EVM_BUTTON |
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32 | cmovz ebx, EVM_REDRAW + EVM_KEY + EVM_BUTTON + EVM_MOUSE |
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33 | mcall 40 |
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34 | |||
9469 | leency | 35 | ;Make cursor transparent |
36 | mov edi, transparent_cursor |
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37 | xor eax, eax |
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38 | mov ecx, 32*32 |
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39 | rep stosd |
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40 | mcall 37, 4, transparent_cursor, 2 |
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41 | mov ecx, eax |
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42 | mcall 37, 5 |
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43 | |||
1778 | yogev_ezra | 44 | ;Preinit. Randomize start counter |
45 | mcall 3 |
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46 | mov [initial_counter], eax ;init with system time |
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47 | |||
48 | ;Query screen size |
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49 | mcall 14 |
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50 | add eax, 0x00010001 |
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51 | mov dword [y_max], eax ;store x_max and y_max |
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52 | shr eax, 1 |
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53 | mov dword [radius], eax ;store radius and x_center |
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54 | |||
55 | ;Calc line_number |
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56 | mov ax, [y_max] |
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57 | mov dx, 0 |
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58 | mov bx, 5 |
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59 | div bx |
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60 | mov word [half_line_number], ax |
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61 | movzx edx, ax ;edx = half_line_number |
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62 | imul edx, 2 * line_coords_element_size ;Space needed for line_coords_array |
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63 | |||
64 | ;Demand memory |
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65 | mcall 68, 11 ; Init heap |
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66 | test eax, eax ; Is heap successfully inited? |
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67 | jnz @f |
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9451 | leency | 68 | jmp exit ; Netu pamjati?! Nu i nahuj vas |
1778 | yogev_ezra | 69 | @@: |
70 | movzx ecx, [y_max] |
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71 | inc ecx |
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72 | movzx eax, [x_max] |
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73 | imul ecx, eax ;[Remember to left here space for 1-2 emergency lines at bottom] |
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74 | add ecx, edx ;And add space for line_coords_array |
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75 | mcall 68, 12, |
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76 | test eax, eax ; Did we get something non zero? |
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77 | jnz @f |
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9451 | leency | 78 | jmp exit |
1778 | yogev_ezra | 79 | @@: |
80 | mov [line_coords_array_pointer], eax |
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81 | add eax, edx |
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82 | mov [image_pointer], eax |
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83 | |||
84 | |||
85 | call clear_offscreen_bitmap |
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86 | |||
87 | |||
88 | |||
89 | ;Calc fixed line ends coords |
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90 | fninit |
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91 | fldpi |
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92 | fidiv word [half_line_number] ;Now st0 contains angle step of line start points |
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93 | |||
94 | mov eax, [line_coords_array_pointer] ;cleanup: comment |
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95 | movzx ecx, word [half_line_number] |
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96 | shl ecx, 1 |
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97 | fld st ;skip zero angle to avoid 1px fixed line at right side |
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98 | |||
99 | |||
100 | calculate_next_line_start_point: |
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101 | fld st |
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102 | |||
103 | ;Calculate line start points coords |
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104 | fsincos |
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105 | fimul [radius] |
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106 | fiadd [x_center] |
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107 | fistp word [eax+start_x_offset] |
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108 | ; fchs ;affects direction, uncomment with corresponding line below |
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109 | fimul [radius] |
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110 | fiadd [radius] |
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111 | fistp word [eax+start_y_offset] |
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112 | |||
113 | ;Calculate line start point pointer |
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114 | movzx ebx, word [eax+start_y_offset] |
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115 | movzx edx, word [x_max] |
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116 | imul ebx, edx |
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117 | movzx edx, word [eax+start_x_offset] |
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118 | add ebx, edx |
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119 | add ebx, [image_pointer] |
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120 | |||
121 | mov [eax+line_start_pointer_offset], ebx |
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122 | |||
123 | |||
124 | fadd st0, st1 |
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125 | add eax, line_coords_element_size ;Move to next element in line_coords_array |
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126 | |||
127 | loop calculate_next_line_start_point |
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128 | |||
129 | fstp st0 ;drop current angle |
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130 | fidiv [divider] ;change angle step |
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131 | |||
132 | |||
133 | draw_window: |
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134 | |||
135 | ;Start line coords calculation |
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136 | |||
137 | fld st ;skip zero angle to avoid 1px fixed line at right side |
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138 | |||
139 | ;Use time since start to get current counter value |
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140 | mcall 26, 9 |
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141 | add eax, [initial_counter] |
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142 | mov [current_counter], eax |
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143 | |||
144 | mov eax, [line_coords_array_pointer] ;cleanup: comment |
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145 | movzx ecx, word [half_line_number] |
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146 | shl ecx, 1 |
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147 | |||
148 | calculate_next_line_end_point: |
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149 | fld st |
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150 | |||
151 | ;Calculate line end points |
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152 | fimul [current_counter] |
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153 | fsincos |
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154 | fimul [radius] |
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155 | fiadd [x_center] |
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156 | fistp word [eax+2] |
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157 | ; fchs ;affects direction, uncomment with corresponding line above |
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158 | fimul [radius] |
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159 | fiadd [radius] |
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160 | fistp word [eax+6] |
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161 | |||
162 | fadd st0, st1 |
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163 | |||
164 | add eax, line_coords_element_size ;Move to next element in line_coords_array |
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165 | loop calculate_next_line_end_point |
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166 | |||
167 | fstp st0 ;drop current angle |
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168 | |||
169 | inc dword [initial_counter] |
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170 | |||
171 | |||
172 | ; ********************************************* |
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173 | ; *******Draw lines on offscreen bitmap******** |
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174 | ; ********************************************* |
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175 | |||
176 | ;draw end points |
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177 | movzx edi, [half_line_number] |
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178 | shl edi, 1 |
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179 | mov esi, [line_coords_array_pointer] |
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180 | |||
181 | draw_next_line: |
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182 | |||
183 | if defined debug ;Draw red points next to line ends in debug mode |
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184 | movzx ebx, word [esi+start_y_offset] |
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185 | movzx eax, word [x_max] |
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186 | imul eax, ebx |
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187 | movzx ebx, word [esi+start_x_offset] |
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188 | add eax, ebx |
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189 | add eax, dword [image_pointer] |
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190 | inc eax |
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191 | mov [eax], byte red_cl_index |
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192 | |||
193 | movzx ebx, word [esi+end_y_offset] |
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194 | movzx eax, word [x_max] |
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195 | imul eax, ebx |
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196 | movzx ebx, word [esi+end_x_offset] |
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197 | add eax, ebx |
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198 | add eax, dword [image_pointer] |
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199 | inc eax ;Move one right to make more visible |
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200 | mov [eax], byte red_cl_index |
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201 | end if |
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202 | |||
203 | |||
204 | ;Drawing lines. Need to keep esi and edi values in process |
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205 | |||
206 | mov eax, [esi+line_start_pointer_offset] |
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207 | |||
208 | check_horizontal_line: |
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209 | |||
210 | mov bx, word [esi+start_y_offset] |
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211 | cmp bx, word [esi+end_y_offset] |
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212 | jnz general_draw_line ;Jump to next test if dy!=0 |
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213 | |||
214 | pusha |
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215 | |||
216 | movzx ecx, word [esi+end_x_offset] |
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217 | sub cx, word [esi+start_x_offset] |
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218 | |||
219 | jnc @f |
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220 | neg cx |
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221 | sub eax, ecx |
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222 | @@: |
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223 | |||
224 | cld |
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225 | inc cx |
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226 | |||
227 | mov edi, eax |
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228 | mov al, foreground_cl_index |
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229 | rep stos byte [edi] |
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230 | |||
231 | popa |
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232 | |||
233 | jmp line_drawing_end |
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234 | |||
235 | |||
236 | |||
237 | ;General line draw algorithm. Based on Bresenham's algorithm (below) but heavily optimized |
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238 | ; function line(x0, x1, y0, y1) |
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239 | ; boolean steep := abs(y1 - y0) > abs(x1 - x0) |
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240 | ; if steep then |
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241 | ; swap(x0, y0) |
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242 | ; swap(x1, y1) |
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243 | ; if x0 > x1 then |
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244 | ; swap(x0, x1) |
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245 | ; swap(y0, y1) |
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246 | ; int deltax := x1 - x0 |
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247 | ; int deltay := abs(y1 - y0) |
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248 | ; int error := deltax / 2 |
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249 | ; int ystep |
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250 | ; int y := y0 |
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251 | ; if y0 < y1 then ystep := 1 else ystep := -1 |
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252 | ; for x from x0 to x1 |
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253 | ; if steep then plot(y,x) else plot(x,y) |
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254 | ; error := error - deltay |
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255 | ; if error < 0 then |
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256 | ; y := y + ystep |
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257 | ; error := error + deltax |
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258 | |||
259 | |||
260 | |||
261 | general_draw_line: |
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262 | pusha |
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263 | |||
264 | ;init step_base and step_secondary |
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265 | mov edx, esi |
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266 | mov esi, 1 |
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267 | movzx edi, word [x_max] |
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268 | |||
269 | ;calc initial delta_base & delta_secondary values |
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270 | movzx ebx, word [edx+end_x_offset] |
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271 | sub bx, [edx+start_x_offset] |
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272 | jnc @f |
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273 | neg bx |
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274 | neg esi |
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275 | @@: |
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276 | movzx ecx, word [edx+end_y_offset] |
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277 | sub cx, [edx+start_y_offset] |
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278 | jnc @f |
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279 | neg cx |
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280 | neg edi |
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281 | @@: |
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282 | |||
283 | ;compare abs(y1 - y0) and abs(x1 - x0) |
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284 | cmp bx, cx |
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285 | jnc @f |
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286 | xchg ebx, ecx |
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287 | xchg esi, edi |
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288 | @@: |
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289 | |||
290 | |||
291 | shl ebx, 16 |
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292 | mov bx, cx |
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293 | rol ebx, 16 |
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294 | mov cx, bx ;init counter |
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295 | inc cx |
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296 | mov dx, bx ;init error |
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297 | shr dx, 1 |
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298 | rol ebx, 16 |
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299 | |||
300 | |||
301 | ;At current point: |
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302 | ;eax = current point pointer |
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303 | ;ebx = (delta_base shl 16) + delta_secondary |
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304 | ;ecx = counter |
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305 | ;[e]dx = error |
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306 | ;esi = step_base |
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307 | ;edi = step_secondary |
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308 | |||
309 | |||
310 | brasenham_plot_point: |
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311 | mov byte [eax], foreground_cl_index |
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312 | add eax, esi |
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313 | |||
314 | sub dx, bx |
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315 | |||
316 | jnc end_loop |
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317 | |||
318 | ; y := y + ystep |
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319 | ; error := error + deltax |
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320 | change_y: |
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321 | add eax, edi |
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322 | rol ebx, 16 |
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323 | add dx, bx |
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324 | rol ebx, 16 |
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325 | |||
326 | end_loop: |
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327 | loopw brasenham_plot_point |
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328 | |||
329 | end_bresenham: |
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330 | |||
331 | popa |
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332 | |||
333 | line_drawing_end: |
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334 | |||
335 | add esi, line_coords_element_size ;Move to next element in line_coords_array |
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336 | dec edi |
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337 | jnz draw_next_line |
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338 | |||
339 | |||
340 | ; ********************************************* |
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341 | ; ******* WINDOW DEFINITIONS AND DRAW ******** |
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342 | ; ********************************************* |
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343 | ; mcall 18, 14 ;Wait for scanning (it seems doesn't do any good now) |
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344 | |||
345 | ; start redraw (without calling 12 proc our window overwrites window that above it) |
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346 | mcall 12, 1 |
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347 | xor eax,eax |
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348 | movzx ebx, [x_max] |
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349 | movzx ecx, [y_max] |
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350 | mov edx, 0x01000000 ;Window style ;Draw nothing |
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351 | ; mov edx, 0x00000000 ;Window style |
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352 | ; mov esi, 0x00000000 ;Header color (prevent odd color line on top of window in random cases) |
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353 | mcall ;Define window |
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354 | |||
355 | |||
356 | mov ebp, 0 |
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357 | mov ecx, dword [y_max] |
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358 | mcall 65, [image_pointer], , <0,0>, 8, palette |
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359 | |||
360 | |||
361 | mcall 12, 2 ; end redraw |
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362 | |||
363 | |||
364 | call clear_offscreen_bitmap |
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365 | |||
366 | wait_event: |
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367 | mcall 23, delay |
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368 | ; mcall 10 |
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369 | test eax, 0xFFFF - 1 ;Test for 0 (delay passed) or 1 (redraw) event |
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370 | jz draw_window ; Delay passed or redraw event |
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371 | dec eax |
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372 | dec eax |
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373 | jnz exit ; If not key then Alt+F4 |
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374 | ; key pressed, read it and ignore |
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375 | mcall 2 |
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6160 | leency | 376 | cmp ah, 27 ; Test Esc key press in ASCII |
377 | jne wait_event |
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1778 | yogev_ezra | 378 | |
379 | ; button pressed; we have only one button, close |
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380 | ; also seems to handle Alt+F4 |
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381 | exit: |
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9451 | leency | 382 | cmp [screensaver], 0 |
383 | jz @f |
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384 | mcall 70, f70 |
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385 | @@: |
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1778 | yogev_ezra | 386 | mcall -1 |
387 | |||
388 | |||
389 | clear_offscreen_bitmap: |
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390 | mov edi, [image_pointer] |
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391 | movzx ecx, [y_max] |
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392 | movzx eax, [x_max] |
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393 | imul ecx, eax |
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394 | shr ecx, 2 ;dword is 4 bytes |
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395 | mov eax, 0 |
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396 | rep stos dword [edi] |
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397 | ret |
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398 | |||
399 | |||
400 | DATA |
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401 | divider dw 5000 |
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402 | |||
403 | palette: |
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404 | background_cl_index = 0 |
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405 | dd background_cl |
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406 | foreground_cl_index = 1 |
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407 | dd foreground_cl |
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408 | |||
409 | if defined debug |
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410 | red_cl_index = 2 |
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411 | dd 0x00FF0000 ;Cleanup this! |
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412 | end if |
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413 | |||
414 | UDATA |
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415 | image_pointer dd ? |
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416 | |||
417 | initial_counter dd ? |
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418 | current_counter dd ? ;counter + current time |
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419 | |||
420 | half_line_number dw ? |
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421 | |||
422 | y_max dw ? ; screen size |
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423 | x_max dw ? |
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424 | |||
425 | radius dw ? |
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426 | x_center dw ? |
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427 | |||
428 | line_coords_array_pointer dd ? |
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429 | |||
430 | ; line_coords_array: |
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431 | ; repeat 1000 ;line_number |
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432 | ; dw ? ;start_x |
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433 | ; dw ? ;end_x |
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434 | ; dw ? ;start_y |
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435 | ; dw ? ;end_y |
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436 | ; dd ? ;line_start_pointer |
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437 | ; end repeat |
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438 | |||
439 | start_x_offset = 0 |
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440 | end_x_offset = 2 |
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441 | start_y_offset = 4 |
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442 | end_y_offset = 6 |
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443 | line_start_pointer_offset = 8 |
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444 | line_coords_element_size = 12 |
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445 | |||
9451 | leency | 446 | __params: |
447 | param rb 40 |
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448 | |||
449 | f70: ; run |
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450 | dd 7, 0, 0, 0, 0 |
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451 | db '/sys/@SS',0 |
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452 | |||
453 | screensaver db ? |
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9469 | leency | 454 | transparent_cursor rd 32*32 |
9451 | leency | 455 | |
1778 | yogev_ezra | 456 | MEOS_APP_END0,0>>> |