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Rev | Author | Line No. | Line |
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6733 | IgorA | 1 | |
2 | |||
3 | |||
4 | ; Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson |
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5 | ; (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
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6 | ; (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
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7 | |||
8 | |||
9 | ; For conditions of distribution and use, see the disclaimer |
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10 | ; and license in png.inc |
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11 | |||
12 | |||
13 | |||
14 | |||
15 | |||
16 | ;void (png_structrp png_ptr) |
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17 | align 4 |
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18 | proc png_set_bgr uses edi, png_ptr:dword |
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19 | png_debug 1, 'in png_set_bgr' |
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20 | |||
21 | |||
22 | cmp edi,0 |
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23 | je @f ;if (..==0) return |
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24 | or dword[edi+png_struct.transformations], PNG_BGR |
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25 | @@: |
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26 | ret |
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27 | endp |
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28 | |||
29 | |||
30 | ;void (png_structrp png_ptr) |
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31 | align 4 |
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32 | proc png_set_swap uses edi, png_ptr:dword |
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33 | png_debug 1, 'in png_set_swap' |
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34 | |||
35 | |||
36 | cmp edi,0 |
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37 | je @f ;if (..==0) return |
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38 | |||
39 | |||
40 | jne @f ;if (..==..) |
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41 | or dword[edi+png_struct.transformations], PNG_SWAP_BYTES |
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42 | @@: |
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43 | ret |
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44 | endp |
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45 | |||
46 | |||
47 | ;void (png_structrp png_ptr) |
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48 | align 4 |
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49 | proc png_set_packing uses edi, png_ptr:dword |
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50 | png_debug 1, 'in png_set_packing' |
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51 | |||
52 | |||
53 | cmp edi,0 |
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54 | je @f ;if (..==0) return |
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55 | |||
56 | |||
57 | jge @f ;if (..<..) |
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58 | or dword[edi+png_struct.transformations], PNG_PACK |
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59 | if PNG_WRITE_SUPPORTED eq 1 |
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60 | mov byte[edi+png_struct.usr_bit_depth],8 |
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61 | end if |
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62 | @@: |
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63 | ret |
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64 | endp |
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65 | |||
66 | |||
67 | ;void (png_structrp png_ptr) |
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68 | align 4 |
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69 | proc png_set_packswap uses edi, png_ptr:dword |
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70 | png_debug 1, 'in png_set_packswap' |
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71 | |||
72 | |||
73 | cmp edi,0 |
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74 | je @f ;if (..==0) return |
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75 | |||
76 | |||
77 | jge @f ;if (..<..) |
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78 | or dword[edi+png_struct.transformations], PNG_PACKSWAP |
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79 | @@: |
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80 | ret |
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81 | endp |
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82 | |||
83 | |||
6797 | IgorA | 84 | align 4 |
6733 | IgorA | 85 | proc png_set_shift uses ecx edi, png_ptr:dword, true_bits:dword |
86 | png_debug 1, 'in png_set_shift' |
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87 | |||
88 | |||
89 | cmp edi,0 |
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90 | je @f ;if (..==0) return |
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91 | |||
92 | |||
93 | mov ecx,sizeof.png_color_8 |
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94 | mov edi,[edi+png_struct.shift] |
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95 | mov esi,[true_bits] |
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96 | rep movsb |
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97 | @@: |
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98 | ret |
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99 | endp |
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100 | |||
101 | |||
102 | align 4 |
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103 | proc png_set_interlace_handling uses edi, png_ptr:dword |
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104 | png_debug 1, 'in png_set_interlace handling' |
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105 | |||
106 | |||
107 | cmp edi,0 |
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108 | je @f |
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109 | cmp byte[edi+png_struct.interlaced],0 |
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110 | je @f ;if(..!=0 && ..!=0) |
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111 | or dword[edi+png_struct.transformations], PNG_INTERLACE |
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112 | mov eax,7 |
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113 | jmp .end_f |
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114 | @@: |
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115 | |||
116 | |||
117 | inc eax |
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118 | .end_f: |
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119 | ret |
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120 | endp |
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121 | |||
122 | |||
123 | ; The filler type has changed in v0.95 to allow future 2-byte fillers |
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124 | ; for 48-bit input data, as well as to avoid problems with some compilers |
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125 | ; that don't like bytes as parameters. |
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126 | |||
127 | |||
128 | align 4 |
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129 | proc png_set_filler uses eax edi, png_ptr:dword, filler:dword, filler_loc:dword |
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130 | png_debug 1, 'in png_set_filler' |
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131 | |||
132 | |||
133 | cmp edi,0 |
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134 | je .end_f ;if (..==0) return |
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135 | |||
136 | |||
137 | ; operation and therefore to do more checking here for a valid call. |
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138 | |||
139 | |||
140 | and eax,PNG_IS_READ_STRUCT |
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141 | jz @f ;if (..!=0) |
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6797 | IgorA | 142 | if PNG_READ_FILLER_SUPPORTED eq 1 |
6733 | IgorA | 143 | ; On read png_set_filler is always valid, regardless of the base PNG |
144 | ; format, because other transformations can give a format where the |
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145 | ; filler code can execute (basically an 8 or 16-bit component RGB or G |
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146 | ; format.) |
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147 | |||
148 | |||
149 | ; confusion in the past.) The filler is only used in the read code. |
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150 | |||
151 | |||
152 | mov [edi+png_struct.filler],ax |
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153 | jmp .end0 |
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154 | else |
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155 | cStr ,'png_set_filler not supported on read' |
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156 | stdcall png_app_error, edi, eax |
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157 | jmp .end_f |
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158 | end if |
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159 | @@: ;else ;write |
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160 | if PNG_WRITE_FILLER_SUPPORTED eq 1 |
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161 | ; On write the usr_channels parameter must be set correctly at the |
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162 | ; start to record the number of channels in the app-supplied data. |
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163 | |||
164 | |||
165 | ; { |
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166 | ; case PNG_COLOR_TYPE_RGB: |
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167 | ; png_ptr->usr_channels = 4; |
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168 | ; break; |
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169 | |||
170 | |||
171 | ; if (png_ptr->bit_depth >= 8) |
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172 | ; { |
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173 | ; png_ptr->usr_channels = 2; |
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174 | ; break; |
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175 | ; } |
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176 | |||
177 | |||
178 | ; { |
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179 | ; There simply isn't any code in libpng to strip out bits |
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180 | ; from bytes when the components are less than a byte in |
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181 | ; size! |
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182 | |||
183 | |||
184 | ; "png_set_filler is invalid for" |
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185 | ; " low bit depth gray output"); |
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186 | ; return; |
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187 | ; } |
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188 | |||
189 | |||
190 | ; png_app_error(png_ptr, |
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191 | ; "png_set_filler: inappropriate color type"); |
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192 | ; return; |
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193 | ; } |
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194 | else |
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195 | cStr ,'png_set_filler not supported on write' |
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196 | stdcall png_app_error, edi, eax |
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197 | jmp .end_f |
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198 | end if |
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199 | .end0: |
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200 | |||
201 | |||
202 | ; and the flag to say where the filler channel is. |
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203 | |||
204 | |||
205 | |||
206 | |||
207 | jne @f ;if (..==..) |
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208 | or dword[edi+png_struct.flags],PNG_FLAG_FILLER_AFTER |
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209 | jmp .end_f |
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210 | @@: ;else |
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211 | and dword[edi+png_struct.flags],not PNG_FLAG_FILLER_AFTER |
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212 | .end_f: |
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213 | ret |
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214 | endp |
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215 | |||
216 | |||
217 | ;void (png_structrp png_ptr, uint_32 filler, int filler_loc) |
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218 | align 4 |
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219 | proc png_set_add_alpha uses eax edi, png_ptr:dword, filler:dword, filler_loc:dword |
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220 | png_debug 1, 'in png_set_add_alpha' |
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221 | |||
222 | |||
223 | cmp edi,0 |
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224 | je .end_f ;if (..==0) return |
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225 | |||
226 | |||
227 | ; The above may fail to do anything. |
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228 | mov eax,[edi+png_struct.transformations] |
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229 | and eax,PNG_FILLER |
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230 | jz .end_f ;if (..!=0) |
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6797 | IgorA | 231 | or dword[edi+png_struct.transformations],PNG_ADD_ALPHA |
6733 | IgorA | 232 | .end_f: |
233 | ret |
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234 | endp |
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235 | |||
236 | |||
237 | align 4 |
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238 | proc png_set_swap_alpha uses edi, png_ptr:dword |
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239 | png_debug 1, 'in png_set_swap_alpha' |
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240 | |||
241 | |||
242 | cmp edi,0 |
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243 | je .end_f ;if (..==0) return |
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244 | or dword[edi+png_struct.transformations], PNG_SWAP_ALPHA |
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6797 | IgorA | 245 | .end_f: |
6733 | IgorA | 246 | ret |
247 | endp |
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248 | |||
249 | |||
250 | |||
251 | align 4 |
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252 | proc png_set_invert_alpha uses edi, png_ptr:dword |
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253 | png_debug 1, 'in png_set_invert_alpha' |
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254 | |||
255 | |||
256 | cmp edi,0 |
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257 | je .end_f ;if (..==0) return |
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258 | or dword[edi+png_struct.transformations], PNG_INVERT_ALPHA |
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6797 | IgorA | 259 | .end_f: |
6733 | IgorA | 260 | ret |
261 | endp |
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262 | |||
263 | |||
264 | align 4 |
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265 | proc png_set_invert_mono uses edi, png_ptr:dword |
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266 | png_debug 1, 'in png_set_invert_mono' |
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267 | |||
268 | |||
269 | cmp edi,0 |
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270 | je .end_f ;if (..==0) return |
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271 | or dword[edi+png_struct.transformations], PNG_INVERT_MONO |
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6797 | IgorA | 272 | .end_f: |
6733 | IgorA | 273 | ret |
274 | endp |
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275 | |||
276 | |||
277 | ;void (png_row_infop row_info, bytep row) |
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278 | align 4 |
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279 | proc png_do_invert, row_info:dword, row:dword |
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280 | png_debug 1, 'in png_do_invert' |
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281 | |||
282 | |||
283 | ; if (row_info->bit_depth == 1 && |
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284 | |||
285 | |||
286 | ; { |
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287 | ; bytep rp = row; |
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288 | ; png_size_t i; |
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289 | ; png_size_t istop = row_info->rowbytes; |
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290 | |||
291 | |||
292 | ; { |
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293 | ; *rp = (byte)(~(*rp)); |
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294 | ; rp++; |
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295 | ; } |
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296 | ; } |
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297 | |||
298 | |||
299 | ; row_info->bit_depth == 8) |
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300 | ; { |
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301 | ; bytep rp = row; |
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302 | ; png_size_t i; |
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303 | ; png_size_t istop = row_info->rowbytes; |
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304 | |||
305 | |||
306 | ; { |
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307 | ; *rp = (byte)(~(*rp)); |
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308 | ; rp += 2; |
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309 | ; } |
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310 | ; } |
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311 | |||
312 | |||
313 | ; else if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA && |
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314 | ; row_info->bit_depth == 16) |
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315 | ; { |
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316 | ; bytep rp = row; |
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317 | ; png_size_t i; |
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318 | ; png_size_t istop = row_info->rowbytes; |
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319 | |||
320 | |||
321 | ; { |
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322 | ; *rp = (byte)(~(*rp)); |
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323 | ; *(rp + 1) = (byte)(~(*(rp + 1))); |
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324 | ; rp += 4; |
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325 | ; } |
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326 | ; } |
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327 | end if |
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328 | ret |
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329 | endp |
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330 | |||
331 | |||
332 | ;void (png_row_infop row_info, bytep row) |
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333 | align 4 |
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334 | proc png_do_swap, row_info:dword, row:dword |
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335 | png_debug 1, 'in png_do_swap' |
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336 | |||
337 | |||
338 | ; { |
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339 | ; bytep rp = row; |
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340 | ; uint_32 i; |
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341 | ; uint_32 istop= row_info->width * row_info->channels; |
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342 | |||
343 | |||
344 | ; { |
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345 | if PNG_BUILTIN_BSWAP16_SUPPORTED eq 1 |
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346 | ; Feature added to libpng-1.6.11 for testing purposes, not |
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347 | ; enabled by default. |
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348 | |||
349 | |||
350 | else |
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351 | ; byte t = *rp; |
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352 | ; *rp = *(rp + 1); |
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353 | ; *(rp + 1) = t; |
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354 | end if |
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355 | ; } |
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356 | ; } |
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357 | ret |
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358 | endp |
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359 | |||
360 | |||
361 | align 4 |
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362 | onebppswaptable db 0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0,\ |
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363 | 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,\ |
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364 | 0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8,\ |
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365 | 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,\ |
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366 | 0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4,\ |
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367 | 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,\ |
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368 | 0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC,\ |
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369 | 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,\ |
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370 | 0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2,\ |
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371 | 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,\ |
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372 | 0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA,\ |
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373 | 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,\ |
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374 | 0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6,\ |
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375 | 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,\ |
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376 | 0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE,\ |
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377 | 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,\ |
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378 | 0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1,\ |
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379 | 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,\ |
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380 | 0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9,\ |
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381 | 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,\ |
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382 | 0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5,\ |
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383 | 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,\ |
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384 | 0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED,\ |
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385 | 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,\ |
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386 | 0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3,\ |
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387 | 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,\ |
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388 | 0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB,\ |
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389 | 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,\ |
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390 | 0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7,\ |
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391 | 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,\ |
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392 | 0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF,\ |
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393 | 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF |
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394 | |||
395 | |||
396 | twobppswaptable db 0x00, 0x40, 0x80, 0xC0, 0x10, 0x50, 0x90, 0xD0,\ |
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397 | 0x20, 0x60, 0xA0, 0xE0, 0x30, 0x70, 0xB0, 0xF0,\ |
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398 | 0x04, 0x44, 0x84, 0xC4, 0x14, 0x54, 0x94, 0xD4,\ |
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399 | 0x24, 0x64, 0xA4, 0xE4, 0x34, 0x74, 0xB4, 0xF4,\ |
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400 | 0x08, 0x48, 0x88, 0xC8, 0x18, 0x58, 0x98, 0xD8,\ |
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401 | 0x28, 0x68, 0xA8, 0xE8, 0x38, 0x78, 0xB8, 0xF8,\ |
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402 | 0x0C, 0x4C, 0x8C, 0xCC, 0x1C, 0x5C, 0x9C, 0xDC,\ |
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403 | 0x2C, 0x6C, 0xAC, 0xEC, 0x3C, 0x7C, 0xBC, 0xFC,\ |
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404 | 0x01, 0x41, 0x81, 0xC1, 0x11, 0x51, 0x91, 0xD1,\ |
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405 | 0x21, 0x61, 0xA1, 0xE1, 0x31, 0x71, 0xB1, 0xF1,\ |
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406 | 0x05, 0x45, 0x85, 0xC5, 0x15, 0x55, 0x95, 0xD5,\ |
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407 | 0x25, 0x65, 0xA5, 0xE5, 0x35, 0x75, 0xB5, 0xF5,\ |
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408 | 0x09, 0x49, 0x89, 0xC9, 0x19, 0x59, 0x99, 0xD9,\ |
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409 | 0x29, 0x69, 0xA9, 0xE9, 0x39, 0x79, 0xB9, 0xF9,\ |
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410 | 0x0D, 0x4D, 0x8D, 0xCD, 0x1D, 0x5D, 0x9D, 0xDD,\ |
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411 | 0x2D, 0x6D, 0xAD, 0xED, 0x3D, 0x7D, 0xBD, 0xFD,\ |
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412 | 0x02, 0x42, 0x82, 0xC2, 0x12, 0x52, 0x92, 0xD2,\ |
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413 | 0x22, 0x62, 0xA2, 0xE2, 0x32, 0x72, 0xB2, 0xF2,\ |
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414 | 0x06, 0x46, 0x86, 0xC6, 0x16, 0x56, 0x96, 0xD6,\ |
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415 | 0x26, 0x66, 0xA6, 0xE6, 0x36, 0x76, 0xB6, 0xF6,\ |
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416 | 0x0A, 0x4A, 0x8A, 0xCA, 0x1A, 0x5A, 0x9A, 0xDA,\ |
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417 | 0x2A, 0x6A, 0xAA, 0xEA, 0x3A, 0x7A, 0xBA, 0xFA,\ |
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418 | 0x0E, 0x4E, 0x8E, 0xCE, 0x1E, 0x5E, 0x9E, 0xDE,\ |
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419 | 0x2E, 0x6E, 0xAE, 0xEE, 0x3E, 0x7E, 0xBE, 0xFE,\ |
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420 | 0x03, 0x43, 0x83, 0xC3, 0x13, 0x53, 0x93, 0xD3,\ |
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421 | 0x23, 0x63, 0xA3, 0xE3, 0x33, 0x73, 0xB3, 0xF3,\ |
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422 | 0x07, 0x47, 0x87, 0xC7, 0x17, 0x57, 0x97, 0xD7,\ |
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423 | 0x27, 0x67, 0xA7, 0xE7, 0x37, 0x77, 0xB7, 0xF7,\ |
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424 | 0x0B, 0x4B, 0x8B, 0xCB, 0x1B, 0x5B, 0x9B, 0xDB,\ |
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425 | 0x2B, 0x6B, 0xAB, 0xEB, 0x3B, 0x7B, 0xBB, 0xFB,\ |
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426 | 0x0F, 0x4F, 0x8F, 0xCF, 0x1F, 0x5F, 0x9F, 0xDF,\ |
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427 | 0x2F, 0x6F, 0xAF, 0xEF, 0x3F, 0x7F, 0xBF, 0xFF |
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428 | |||
429 | |||
430 | fourbppswaptable db 0x00, 0x10, 0x20, 0x30, 0x40, 0x50, 0x60, 0x70,\ |
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431 | 0x80, 0x90, 0xA0, 0xB0, 0xC0, 0xD0, 0xE0, 0xF0,\ |
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432 | 0x01, 0x11, 0x21, 0x31, 0x41, 0x51, 0x61, 0x71,\ |
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433 | 0x81, 0x91, 0xA1, 0xB1, 0xC1, 0xD1, 0xE1, 0xF1,\ |
||
434 | 0x02, 0x12, 0x22, 0x32, 0x42, 0x52, 0x62, 0x72,\ |
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435 | 0x82, 0x92, 0xA2, 0xB2, 0xC2, 0xD2, 0xE2, 0xF2,\ |
||
436 | 0x03, 0x13, 0x23, 0x33, 0x43, 0x53, 0x63, 0x73,\ |
||
437 | 0x83, 0x93, 0xA3, 0xB3, 0xC3, 0xD3, 0xE3, 0xF3,\ |
||
438 | 0x04, 0x14, 0x24, 0x34, 0x44, 0x54, 0x64, 0x74,\ |
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439 | 0x84, 0x94, 0xA4, 0xB4, 0xC4, 0xD4, 0xE4, 0xF4,\ |
||
440 | 0x05, 0x15, 0x25, 0x35, 0x45, 0x55, 0x65, 0x75,\ |
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441 | 0x85, 0x95, 0xA5, 0xB5, 0xC5, 0xD5, 0xE5, 0xF5,\ |
||
442 | 0x06, 0x16, 0x26, 0x36, 0x46, 0x56, 0x66, 0x76,\ |
||
443 | 0x86, 0x96, 0xA6, 0xB6, 0xC6, 0xD6, 0xE6, 0xF6,\ |
||
444 | 0x07, 0x17, 0x27, 0x37, 0x47, 0x57, 0x67, 0x77,\ |
||
445 | 0x87, 0x97, 0xA7, 0xB7, 0xC7, 0xD7, 0xE7, 0xF7,\ |
||
446 | 0x08, 0x18, 0x28, 0x38, 0x48, 0x58, 0x68, 0x78,\ |
||
447 | 0x88, 0x98, 0xA8, 0xB8, 0xC8, 0xD8, 0xE8, 0xF8,\ |
||
448 | 0x09, 0x19, 0x29, 0x39, 0x49, 0x59, 0x69, 0x79,\ |
||
449 | 0x89, 0x99, 0xA9, 0xB9, 0xC9, 0xD9, 0xE9, 0xF9,\ |
||
450 | 0x0A, 0x1A, 0x2A, 0x3A, 0x4A, 0x5A, 0x6A, 0x7A,\ |
||
451 | 0x8A, 0x9A, 0xAA, 0xBA, 0xCA, 0xDA, 0xEA, 0xFA,\ |
||
452 | 0x0B, 0x1B, 0x2B, 0x3B, 0x4B, 0x5B, 0x6B, 0x7B,\ |
||
453 | 0x8B, 0x9B, 0xAB, 0xBB, 0xCB, 0xDB, 0xEB, 0xFB,\ |
||
454 | 0x0C, 0x1C, 0x2C, 0x3C, 0x4C, 0x5C, 0x6C, 0x7C,\ |
||
455 | 0x8C, 0x9C, 0xAC, 0xBC, 0xCC, 0xDC, 0xEC, 0xFC,\ |
||
456 | 0x0D, 0x1D, 0x2D, 0x3D, 0x4D, 0x5D, 0x6D, 0x7D,\ |
||
457 | 0x8D, 0x9D, 0xAD, 0xBD, 0xCD, 0xDD, 0xED, 0xFD,\ |
||
458 | 0x0E, 0x1E, 0x2E, 0x3E, 0x4E, 0x5E, 0x6E, 0x7E,\ |
||
459 | 0x8E, 0x9E, 0xAE, 0xBE, 0xCE, 0xDE, 0xEE, 0xFE,\ |
||
460 | 0x0F, 0x1F, 0x2F, 0x3F, 0x4F, 0x5F, 0x6F, 0x7F,\ |
||
461 | 0x8F, 0x9F, 0xAF, 0xBF, 0xCF, 0xDF, 0xEF, 0xFF |
||
462 | end if ;PACKSWAP || WRITE_PACKSWAP |
||
463 | |||
464 | |||
465 | ;void (png_row_infop row_info, bytep row) |
||
466 | align 4 |
||
467 | proc png_do_packswap uses eax edx edi esi, row_info:dword, row:dword |
||
468 | png_debug 1, 'in png_do_packswap' |
||
469 | |||
470 | |||
471 | cmp byte[eax+png_row_info.bit_depth],8 |
||
472 | jge .end_f ;if (..<..) |
||
473 | ;edi = rp |
||
474 | ;esi = table |
||
475 | |||
476 | |||
477 | mov edi,[row] |
||
478 | add edx,edi |
||
479 | |||
480 | |||
481 | jne @f ;if (..==..) |
||
482 | mov esi,onebppswaptable |
||
483 | jmp .cycle0 |
||
484 | @@: |
||
485 | cmp byte[eax+png_row_info.bit_depth],2 |
||
486 | jne @f ;else if (..==..) |
||
487 | mov esi,twobppswaptable |
||
488 | jmp .cycle0 |
||
489 | @@: |
||
490 | cmp byte[eax+png_row_info.bit_depth],4 |
||
491 | jne .end_f ;else if (..==..) |
||
492 | mov esi,fourbppswaptable |
||
493 | align 4 |
||
494 | .cycle0: ;for (..=..;..<..;..) |
||
495 | cmp edi,edx |
||
496 | jge .end_f |
||
497 | movzx eax,byte[edi] |
||
498 | mov al,byte[esi+eax] |
||
499 | stosb ;*rp = table[*rp] |
||
500 | jmp .cycle0 |
||
501 | .end_f: |
||
502 | ret |
||
503 | endp |
||
504 | |||
505 | |||
506 | ; somewhat weird combination of flags to determine what to do. All the calls |
||
507 | ; to png_do_strip_filler are changed in 1.5.2 to call this instead with the |
||
508 | ; correct arguments. |
||
509 | |||
510 | |||
511 | ; end (not in the middle) of each pixel. |
||
512 | |||
513 | |||
514 | align 4 |
||
515 | proc png_do_strip_channel, row_info:dword, row:dword, at_start:dword |
||
516 | ; bytep sp = row; /* source pointer */ |
||
517 | ; bytep dp = row; /* destination pointer */ |
||
518 | ; bytep ep = row + row_info->rowbytes; /* One beyond end of row */ |
||
519 | |||
520 | |||
521 | ; it is copied to. ep always points just beyond the end of the row, so |
||
522 | ; the loop simply copies (channels-1) channels until sp reaches ep. |
||
523 | |||
524 | |||
525 | ; nonzero -- convert GA, GX, RGBA, RGBX, GGAA, RRGGBBXX, etc. |
||
526 | |||
527 | |||
528 | |||
529 | ; if (row_info->channels == 2) |
||
530 | ; { |
||
531 | ; if (row_info->bit_depth == 8) |
||
532 | ; { |
||
533 | ; if (at_start != 0) /* Skip initial filler */ |
||
534 | ; ++sp; |
||
535 | ; else /* Skip initial channel and, for sp, the filler */ |
||
536 | ; sp += 2, ++dp; |
||
537 | |||
538 | |||
539 | ; while (sp < ep) |
||
540 | ; *dp++ = *sp, sp += 2; |
||
541 | |||
542 | |||
543 | ; } |
||
544 | |||
545 | |||
546 | ; { |
||
547 | ; if (at_start != 0) /* Skip initial filler */ |
||
548 | ; sp += 2; |
||
549 | ; else /* Skip initial channel and, for sp, the filler */ |
||
550 | ; sp += 4, dp += 2; |
||
551 | |||
552 | |||
553 | ; *dp++ = *sp++, *dp++ = *sp, sp += 3; |
||
554 | |||
555 | |||
556 | ; } |
||
557 | |||
558 | |||
559 | ; return; /* bad bit depth */ |
||
560 | |||
561 | |||
562 | |||
563 | |||
564 | ; if (row_info->color_type == PNG_COLOR_TYPE_GRAY_ALPHA) |
||
565 | ; row_info->color_type = PNG_COLOR_TYPE_GRAY; |
||
566 | ; } |
||
567 | |||
568 | |||
569 | ; else if (row_info->channels == 4) |
||
570 | ; { |
||
571 | ; if (row_info->bit_depth == 8) |
||
572 | ; { |
||
573 | ; if (at_start != 0) /* Skip initial filler */ |
||
574 | ; ++sp; |
||
575 | ; else /* Skip initial channels and, for sp, the filler */ |
||
576 | ; sp += 4, dp += 3; |
||
577 | |||
578 | |||
579 | ; while (sp < ep) |
||
580 | ; *dp++ = *sp++, *dp++ = *sp++, *dp++ = *sp, sp += 2; |
||
581 | |||
582 | |||
583 | ; } |
||
584 | |||
585 | |||
586 | ; { |
||
587 | ; if (at_start != 0) /* Skip initial filler */ |
||
588 | ; sp += 2; |
||
589 | ; else /* Skip initial channels and, for sp, the filler */ |
||
590 | ; sp += 8, dp += 6; |
||
591 | |||
592 | |||
593 | ; { |
||
594 | ; /* Copy 6 bytes, skip 2 */ |
||
595 | ; *dp++ = *sp++, *dp++ = *sp++; |
||
596 | ; *dp++ = *sp++, *dp++ = *sp++; |
||
597 | ; *dp++ = *sp++, *dp++ = *sp, sp += 3; |
||
598 | ; } |
||
599 | |||
600 | |||
601 | ; } |
||
602 | |||
603 | |||
604 | ; return; /* bad bit depth */ |
||
605 | |||
606 | |||
607 | |||
608 | |||
609 | ; if (row_info->color_type == PNG_COLOR_TYPE_RGB_ALPHA) |
||
610 | ; row_info->color_type = PNG_COLOR_TYPE_RGB; |
||
611 | ; } |
||
612 | |||
613 | |||
614 | ; return; /* The filler channel has gone already */ |
||
615 | |||
616 | |||
617 | ; row_info->rowbytes = dp-row; |
||
618 | ret |
||
619 | endp |
||
620 | |||
621 | |||
622 | ;void (png_row_infop row_info, bytep row) |
||
623 | align 4 |
||
624 | proc png_do_bgr, row_info:dword, row:dword |
||
625 | png_debug 1, 'in png_do_bgr' |
||
626 | |||
627 | |||
628 | ; { |
||
629 | ; uint_32 row_width = row_info->width; |
||
630 | ; if (row_info->bit_depth == 8) |
||
631 | ; { |
||
632 | ; if (row_info->color_type == PNG_COLOR_TYPE_RGB) |
||
633 | ; { |
||
634 | ; bytep rp; |
||
635 | ; uint_32 i; |
||
636 | |||
637 | |||
638 | ; { |
||
639 | ; byte save = *rp; |
||
640 | ; *rp = *(rp + 2); |
||
641 | ; *(rp + 2) = save; |
||
642 | ; } |
||
643 | ; } |
||
644 | |||
645 | |||
646 | ; { |
||
647 | ; bytep rp; |
||
648 | ; uint_32 i; |
||
649 | |||
650 | |||
651 | ; { |
||
652 | ; byte save = *rp; |
||
653 | ; *rp = *(rp + 2); |
||
654 | ; *(rp + 2) = save; |
||
655 | ; } |
||
656 | ; } |
||
657 | ; } |
||
658 | |||
659 | |||
660 | ; else if (row_info->bit_depth == 16) |
||
661 | ; { |
||
662 | ; if (row_info->color_type == PNG_COLOR_TYPE_RGB) |
||
663 | ; { |
||
664 | ; bytep rp; |
||
665 | ; uint_32 i; |
||
666 | |||
667 | |||
668 | ; { |
||
669 | ; byte save = *rp; |
||
670 | ; *rp = *(rp + 4); |
||
671 | ; *(rp + 4) = save; |
||
672 | ; save = *(rp + 1); |
||
673 | ; *(rp + 1) = *(rp + 5); |
||
674 | ; *(rp + 5) = save; |
||
675 | ; } |
||
676 | ; } |
||
677 | |||
678 | |||
679 | ; { |
||
680 | ; bytep rp; |
||
681 | ; uint_32 i; |
||
682 | |||
683 | |||
684 | ; { |
||
685 | ; byte save = *rp; |
||
686 | ; *rp = *(rp + 4); |
||
687 | ; *(rp + 4) = save; |
||
688 | ; save = *(rp + 1); |
||
689 | ; *(rp + 1) = *(rp + 5); |
||
690 | ; *(rp + 5) = save; |
||
691 | ; } |
||
692 | ; } |
||
693 | ; } |
||
694 | end if |
||
695 | ; } |
||
696 | ret |
||
697 | endp |
||
698 | |||
699 | |||
700 | ;void (png_structrp png_ptr, png_row_infop row_info) |
||
701 | align 4 |
||
702 | proc png_do_check_palette_indexes, png_ptr:dword, row_info:dword |
||
703 | ; if (png_ptr->num_palette < (1 << row_info->bit_depth) && |
||
704 | ; png_ptr->num_palette > 0) /* num_palette can be 0 in MNG files */ |
||
705 | ; { |
||
706 | ; Calculations moved outside switch in an attempt to stop different |
||
707 | ; compiler warnings. 'padding' is in *bits* within the last byte, it is |
||
708 | ; an 'int' because pixel_depth becomes an 'int' in the expression below, |
||
709 | ; and this calculation is used because it avoids warnings that other |
||
710 | ; forms produced on either GCC or MSVC. |
||
711 | |||
712 | |||
713 | ; bytep rp = png_ptr->row_buf + row_info->rowbytes; |
||
714 | |||
715 | |||
716 | ; { |
||
717 | ; case 1: |
||
718 | ; { |
||
719 | ; /* in this case, all bytes must be 0 so we don't need |
||
720 | ; to unpack the pixels except for the rightmost one. |
||
721 | |||
722 | |||
723 | ; { |
||
724 | ; if ((*rp >> padding) != 0) |
||
725 | ; png_ptr->num_palette_max = 1; |
||
726 | ; padding = 0; |
||
727 | ; } |
||
728 | |||
729 | |||
730 | ; } |
||
731 | |||
732 | |||
733 | ; { |
||
734 | ; for (; rp > png_ptr->row_buf; rp--) |
||
735 | ; { |
||
736 | ; int i = ((*rp >> padding) & 0x03); |
||
737 | |||
738 | |||
739 | ; png_ptr->num_palette_max = i; |
||
740 | |||
741 | |||
742 | |||
743 | |||
744 | ; png_ptr->num_palette_max = i; |
||
745 | |||
746 | |||
747 | |||
748 | |||
749 | ; png_ptr->num_palette_max = i; |
||
750 | |||
751 | |||
752 | |||
753 | |||
754 | ; png_ptr->num_palette_max = i; |
||
755 | |||
756 | |||
757 | ; } |
||
758 | |||
759 | |||
760 | ; } |
||
761 | |||
762 | |||
763 | ; { |
||
764 | ; for (; rp > png_ptr->row_buf; rp--) |
||
765 | ; { |
||
766 | ; int i = ((*rp >> padding) & 0x0f); |
||
767 | |||
768 | |||
769 | ; png_ptr->num_palette_max = i; |
||
770 | |||
771 | |||
772 | |||
773 | |||
774 | ; png_ptr->num_palette_max = i; |
||
775 | |||
776 | |||
777 | ; } |
||
778 | |||
779 | |||
780 | ; } |
||
781 | |||
782 | |||
783 | ; { |
||
784 | ; for (; rp > png_ptr->row_buf; rp--) |
||
785 | ; { |
||
786 | ; if (*rp > png_ptr->num_palette_max) |
||
787 | ; png_ptr->num_palette_max = (int) *rp; |
||
788 | ; } |
||
789 | |||
790 | |||
791 | ; } |
||
792 | |||
793 | |||
794 | ; break; |
||
795 | ; } |
||
796 | ; } |
||
797 | ret |
||
798 | endp |
||
799 | |||
800 | |||
801 | align 4 |
||
802 | proc png_set_user_transform_info uses eax edi, png_ptr:dword, user_transform_ptr:dword, user_transform_depth:dword, user_transform_channels:dword |
||
803 | png_debug 1, 'in png_set_user_transform_info' |
||
804 | |||
805 | |||
806 | cmp edi,0 |
||
807 | je .end_f |
||
808 | |||
809 | |||
810 | mov eax,[edi+png_struct.mode] |
||
811 | and eax,PNG_IS_READ_STRUCT |
||
812 | jz @f |
||
6797 | IgorA | 813 | mov eax,[edi+png_struct.flags] |
6733 | IgorA | 814 | and eax,PNG_FLAG_ROW_INIT |
815 | jz @f ;if (..!=0 && ..!=0) |
||
6797 | IgorA | 816 | cStr ,'info change after png_start_read_image or png_read_update_info' |
6733 | IgorA | 817 | stdcall png_app_error, edi, eax |
6779 | IgorA | 818 | jmp .end_f |
6733 | IgorA | 819 | @@: |
820 | end if |
||
821 | |||
822 | |||
823 | mov [edi+png_struct.user_transform_ptr],eax |
||
824 | mov eax,[user_transform_depth] |
||
825 | mov [edi+png_struct.user_transform_depth],al |
||
826 | mov eax,[user_transform_channels] |
||
827 | mov [edi+png_struct.user_transform_channels],al |
||
828 | .end_f: |
||
829 | ret |
||
830 | endp |
||
831 | |||
832 | |||
833 | ; the user transform functions. The application should free any memory |
||
834 | ; associated with this pointer before png_write_destroy and png_read_destroy |
||
835 | ; are called. |
||
836 | |||
837 | |||
6797 | IgorA | 838 | align 4 |
6733 | IgorA | 839 | proc png_get_user_transform_ptr, png_ptr:dword |
840 | mov eax,[png_ptr] |
||
841 | cmp eax,0 |
||
842 | je @f |
||
843 | mov eax,[eax+png_struct.user_transform_ptr] |
||
844 | @@: |
||
845 | ret |
||
846 | endp |
||
847 | |||
848 | |||
6797 | IgorA | 849 | align 4 |
6733 | IgorA | 850 | proc png_get_current_row_number, png_ptr:dword |
851 | ; See the comments in png.inc - this is the sub-image row when reading an |
||
852 | ; interlaced image. |
||
853 | |||
854 | |||
855 | cmp eax,0 |
||
856 | je @f ;if (..!=0) |
||
857 | mov eax,[eax+png_struct.row_number] |
||
858 | jmp .end_f |
||
859 | @@: |
||
860 | mov eax,PNG_UINT_32_MAX ;help the app not to fail silently |
||
861 | .end_f: |
||
862 | ret |
||
863 | endp |
||
864 | |||
865 | |||
6797 | IgorA | 866 | align 4 |
6733 | IgorA | 867 | proc png_get_current_pass_number, png_ptr:dword |
868 | mov eax,[png_ptr] |
||
869 | cmp eax,0 |
||
870 | je @f ;if (..!=0) |
||
871 | mov eax,[eax+png_struct.pass] |
||
872 | jmp .end_f |
||
873 | @@: |
||
874 | mov eax,8 ;invalid |
||
875 | .end_f: |
||
876 | ret |
||
877 | endp |
||
878 | end if><>>>>>>>>>> |
||
879 | > |