Cyd
2b8ca921cb
Complete disaster-recovery snapshot: engine/game source, game data assets, VC6 toolchain + DX SDKs, build outputs, deployed game, and _UNUSED archive. Large binaries in Git LFS; text preserved byte-for-byte (core.autocrlf=false, no eol attributes). See RECOVERY.md for the one-clone rebuild procedure.
151 lines
3.4 KiB
C++
151 lines
3.4 KiB
C++
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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void
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FeatureGrid::BLENDFUNCTION (
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FeatureInstance *featureInstance,
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unsigned char *pix_buf,
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int start_span,
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int end_span,
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int downScale
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)
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{
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Feature *feature = featureInstance->feature;
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Verify(feature->featureMask0!=NULL);
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unsigned char *mask0data = featureInstance->currentMask0Ptr;
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#ifdef SHOW_MATERIAL
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DWORD mat_color = downScale & 0xffffff;
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downScale >>= 24;
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#else
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int texture_width = (featureInstance->feature->featureTexture->width) >> downScale;
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int count_down = featureInstance->countDownToBorder;
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WORD *data_ptr_word = (WORD *)featureInstance->currentTexturePtr;
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#endif
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int mask0_x_off = featureInstance->mask0_x_off >> downScale;
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int mask0_z_off = featureInstance->mask0_z_off >> downScale;
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int shifter = feature->GetZMask0Scale() + feature->GetXMask0Scale() - 2*downScale;
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int x_stretch = 1<<(feature->GetXMask0Scale()-downScale);
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int z_stretch = 1<<(feature->GetZMask0Scale()-downScale);
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#ifdef MASK0_HORIZONTAL_FLIP
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int advancer = x_stretch-1;
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#else
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int advancer = ~(x_stretch-1);
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#endif
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int adv, mixH, mix0, mix1, mix00, mix01, mix10, mix11;
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int pitch = feature->featureMask0->width + 2;
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mix00 = *mask0data;
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mix01 = *(mask0data + 1);
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mix10 = *(mask0data + pitch);
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mix11 = *(mask0data + pitch + 1);
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mix0 = (mix00*(z_stretch - mask0_z_off) + mix10*mask0_z_off);
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mix1 = (mix01*(z_stretch - mask0_z_off) + mix11*mask0_z_off);
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mixH = (mix0*(x_stretch - mask0_x_off) + mix1*mask0_x_off);
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adv = mix1 - mix0;
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int *pix_buf_int = (int *)pix_buf;
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// for(int i=0;i<end_span-start_span;i++)
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for(int i=0;;)
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{
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int mix = mixH>>shifter;
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#ifdef MASK0_HORIZONTAL_FLIP
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mixH -= adv;
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#else
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mixH += adv;
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#endif
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#ifdef SHOW_MATERIAL
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if(mix > 0x80)
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{
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pix_buf_int[i] = mat_color;
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}
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#else
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if(mix!=0)
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{
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DWORD dst = pix_buf_int[i];
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#ifdef TEXTURE_HORIZONTAL_FLIP
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DWORD src = data_ptr_word[-i];
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#else
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DWORD src = data_ptr_word[i];
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#endif
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DWORD buf;
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DWORD srcmix = mix<<3;
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mix = 0xff-mix;
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buf = ((dst & 0xff)*mix + (src & 0x1f)*srcmix)>>8;
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buf |= (((dst>>8)&0xff)*mix + ((src & 0x3e0) >> 5)*srcmix)&0xff00;
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buf |= ((((dst>>16)&0xff)*mix + (src >> 10)*srcmix)&0xff00)<<8;
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pix_buf_int[i] = buf;
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}
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#endif
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if(++i>=end_span-start_span)
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{
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break;
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}
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#ifdef MASK0_HORIZONTAL_FLIP
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#ifndef SHOW_MATERIAL
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if(--count_down <= 0)
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{
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data_ptr_word += texture_width;
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count_down = texture_width;
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}
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#endif
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if(--mask0_x_off < 0)
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{
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mask0_x_off = advancer;
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mask0data -= feature->featureMask0->depth;
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mix01 = mix00;
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mix00 = *mask0data;
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mix11 = mix10;
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mix10 = *(mask0data + pitch);
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mix1 = mix0;
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mix0 = (mix00*(z_stretch - mask0_z_off) + mix10*mask0_z_off);
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#else
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#ifndef SHOW_MATERIAL
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if(--count_down <= 0)
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{
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data_ptr_word -= texture_width;
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count_down = texture_width;
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}
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#endif
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if(++mask0_x_off & advancer)
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{
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mask0_x_off = 0;
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mask0data += feature->featureMask0->depth;
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mix00 = mix01;
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mix01 = *(mask0data + 1);
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mix10 = mix11;
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mix11 = *(mask0data + pitch + 1);
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mix0 = mix1;
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mix1 = (mix01*(z_stretch - mask0_z_off) + mix11*mask0_z_off);
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#endif
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mixH = (mix0*(x_stretch - mask0_x_off) + mix1*mask0_x_off);
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adv = mix1 - mix0;
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}
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}
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}
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