fill with winding rule
This commit is contained in:
Laurent Le Goff
parent
25f7be3323
commit
eaa2454bb3
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@ -1,135 +1,135 @@
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// Copyright 2011 The draw2d Authors. All rights reserved.
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// created: 27/05/2011 by Laurent Le Goff
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package raster
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var SUBPIXEL_OFFSETS_SAMPLE_8 = [8]float64{
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5 / 8, 0 / 8,
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3 / 8, 6 / 8,
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1 / 8, 4 / 8,
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7 / 8, 2 / 8,
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}
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var SUBPIXEL_OFFSETS_SAMPLE_16 = [16]float64{
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(1 / 16),
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(8 / 16),
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(4 / 16),
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(15 / 16),
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(11 / 16),
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(2 / 16),
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(6 / 16),
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(14 / 16),
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(10 / 16),
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(3 / 16),
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(7 / 16),
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(12 / 16),
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(0 / 16),
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(9 / 16),
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(5 / 16),
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(13 / 16),
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}
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var SUBPIXEL_OFFSETS_SAMPLE_32 = [32]float64{
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28 / 32,
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13 / 32,
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6 / 32,
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23 / 32,
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0 / 32,
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17 / 32,
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10 / 32,
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27 / 32,
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4 / 32,
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21 / 32,
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14 / 32,
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31 / 32,
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8 / 32,
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25 / 32,
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18 / 32,
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3 / 32,
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12 / 32,
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29 / 32,
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22 / 32,
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7 / 32,
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16 / 32,
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1 / 32,
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26 / 32,
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11 / 32,
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20 / 32,
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5 / 32,
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30 / 32,
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15 / 32,
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24 / 32,
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9 / 32,
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2 / 32,
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19 / 32,
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}
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var coverageTable = [256]uint8{
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pixelCoverage(0x00), pixelCoverage(0x01), pixelCoverage(0x02), pixelCoverage(0x03),
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pixelCoverage(0x04), pixelCoverage(0x05), pixelCoverage(0x06), pixelCoverage(0x07),
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pixelCoverage(0x08), pixelCoverage(0x09), pixelCoverage(0x0a), pixelCoverage(0x0b),
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pixelCoverage(0x0c), pixelCoverage(0x0d), pixelCoverage(0x0e), pixelCoverage(0x0f),
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pixelCoverage(0x10), pixelCoverage(0x11), pixelCoverage(0x12), pixelCoverage(0x13),
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pixelCoverage(0x14), pixelCoverage(0x15), pixelCoverage(0x16), pixelCoverage(0x17),
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pixelCoverage(0x18), pixelCoverage(0x19), pixelCoverage(0x1a), pixelCoverage(0x1b),
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pixelCoverage(0x1c), pixelCoverage(0x1d), pixelCoverage(0x1e), pixelCoverage(0x1f),
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pixelCoverage(0x20), pixelCoverage(0x21), pixelCoverage(0x22), pixelCoverage(0x23),
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pixelCoverage(0x24), pixelCoverage(0x25), pixelCoverage(0x26), pixelCoverage(0x27),
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pixelCoverage(0x28), pixelCoverage(0x29), pixelCoverage(0x2a), pixelCoverage(0x2b),
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pixelCoverage(0x2c), pixelCoverage(0x2d), pixelCoverage(0x2e), pixelCoverage(0x2f),
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pixelCoverage(0x30), pixelCoverage(0x31), pixelCoverage(0x32), pixelCoverage(0x33),
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pixelCoverage(0x34), pixelCoverage(0x35), pixelCoverage(0x36), pixelCoverage(0x37),
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pixelCoverage(0x38), pixelCoverage(0x39), pixelCoverage(0x3a), pixelCoverage(0x3b),
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pixelCoverage(0x3c), pixelCoverage(0x3d), pixelCoverage(0x3e), pixelCoverage(0x3f),
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pixelCoverage(0x40), pixelCoverage(0x41), pixelCoverage(0x42), pixelCoverage(0x43),
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pixelCoverage(0x44), pixelCoverage(0x45), pixelCoverage(0x46), pixelCoverage(0x47),
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pixelCoverage(0x48), pixelCoverage(0x49), pixelCoverage(0x4a), pixelCoverage(0x4b),
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pixelCoverage(0x4c), pixelCoverage(0x4d), pixelCoverage(0x4e), pixelCoverage(0x4f),
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pixelCoverage(0x50), pixelCoverage(0x51), pixelCoverage(0x52), pixelCoverage(0x53),
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pixelCoverage(0x54), pixelCoverage(0x55), pixelCoverage(0x56), pixelCoverage(0x57),
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pixelCoverage(0x58), pixelCoverage(0x59), pixelCoverage(0x5a), pixelCoverage(0x5b),
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pixelCoverage(0x5c), pixelCoverage(0x5d), pixelCoverage(0x5e), pixelCoverage(0x5f),
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pixelCoverage(0x60), pixelCoverage(0x61), pixelCoverage(0x62), pixelCoverage(0x63),
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pixelCoverage(0x64), pixelCoverage(0x65), pixelCoverage(0x66), pixelCoverage(0x67),
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pixelCoverage(0x68), pixelCoverage(0x69), pixelCoverage(0x6a), pixelCoverage(0x6b),
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pixelCoverage(0x6c), pixelCoverage(0x6d), pixelCoverage(0x6e), pixelCoverage(0x6f),
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pixelCoverage(0x70), pixelCoverage(0x71), pixelCoverage(0x72), pixelCoverage(0x73),
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pixelCoverage(0x74), pixelCoverage(0x75), pixelCoverage(0x76), pixelCoverage(0x77),
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pixelCoverage(0x78), pixelCoverage(0x79), pixelCoverage(0x7a), pixelCoverage(0x7b),
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pixelCoverage(0x7c), pixelCoverage(0x7d), pixelCoverage(0x7e), pixelCoverage(0x7f),
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pixelCoverage(0x80), pixelCoverage(0x81), pixelCoverage(0x82), pixelCoverage(0x83),
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pixelCoverage(0x84), pixelCoverage(0x85), pixelCoverage(0x86), pixelCoverage(0x87),
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pixelCoverage(0x88), pixelCoverage(0x89), pixelCoverage(0x8a), pixelCoverage(0x8b),
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pixelCoverage(0x8c), pixelCoverage(0x8d), pixelCoverage(0x8e), pixelCoverage(0x8f),
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pixelCoverage(0x90), pixelCoverage(0x91), pixelCoverage(0x92), pixelCoverage(0x93),
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pixelCoverage(0x94), pixelCoverage(0x95), pixelCoverage(0x96), pixelCoverage(0x97),
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pixelCoverage(0x98), pixelCoverage(0x99), pixelCoverage(0x9a), pixelCoverage(0x9b),
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pixelCoverage(0x9c), pixelCoverage(0x9d), pixelCoverage(0x9e), pixelCoverage(0x9f),
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pixelCoverage(0xa0), pixelCoverage(0xa1), pixelCoverage(0xa2), pixelCoverage(0xa3),
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pixelCoverage(0xa4), pixelCoverage(0xa5), pixelCoverage(0xa6), pixelCoverage(0xa7),
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pixelCoverage(0xa8), pixelCoverage(0xa9), pixelCoverage(0xaa), pixelCoverage(0xab),
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pixelCoverage(0xac), pixelCoverage(0xad), pixelCoverage(0xae), pixelCoverage(0xaf),
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pixelCoverage(0xb0), pixelCoverage(0xb1), pixelCoverage(0xb2), pixelCoverage(0xb3),
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pixelCoverage(0xb4), pixelCoverage(0xb5), pixelCoverage(0xb6), pixelCoverage(0xb7),
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pixelCoverage(0xb8), pixelCoverage(0xb9), pixelCoverage(0xba), pixelCoverage(0xbb),
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pixelCoverage(0xbc), pixelCoverage(0xbd), pixelCoverage(0xbe), pixelCoverage(0xbf),
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pixelCoverage(0xc0), pixelCoverage(0xc1), pixelCoverage(0xc2), pixelCoverage(0xc3),
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pixelCoverage(0xc4), pixelCoverage(0xc5), pixelCoverage(0xc6), pixelCoverage(0xc7),
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pixelCoverage(0xc8), pixelCoverage(0xc9), pixelCoverage(0xca), pixelCoverage(0xcb),
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pixelCoverage(0xcc), pixelCoverage(0xcd), pixelCoverage(0xce), pixelCoverage(0xcf),
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pixelCoverage(0xd0), pixelCoverage(0xd1), pixelCoverage(0xd2), pixelCoverage(0xd3),
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pixelCoverage(0xd4), pixelCoverage(0xd5), pixelCoverage(0xd6), pixelCoverage(0xd7),
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pixelCoverage(0xd8), pixelCoverage(0xd9), pixelCoverage(0xda), pixelCoverage(0xdb),
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pixelCoverage(0xdc), pixelCoverage(0xdd), pixelCoverage(0xde), pixelCoverage(0xdf),
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pixelCoverage(0xe0), pixelCoverage(0xe1), pixelCoverage(0xe2), pixelCoverage(0xe3),
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pixelCoverage(0xe4), pixelCoverage(0xe5), pixelCoverage(0xe6), pixelCoverage(0xe7),
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pixelCoverage(0xe8), pixelCoverage(0xe9), pixelCoverage(0xea), pixelCoverage(0xeb),
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pixelCoverage(0xec), pixelCoverage(0xed), pixelCoverage(0xee), pixelCoverage(0xef),
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pixelCoverage(0xf0), pixelCoverage(0xf1), pixelCoverage(0xf2), pixelCoverage(0xf3),
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pixelCoverage(0xf4), pixelCoverage(0xf5), pixelCoverage(0xf6), pixelCoverage(0xf7),
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pixelCoverage(0xf8), pixelCoverage(0xf9), pixelCoverage(0xfa), pixelCoverage(0xfb),
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pixelCoverage(0xfc), pixelCoverage(0xfd), pixelCoverage(0xfe), pixelCoverage(0xff),
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}
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func pixelCoverage(a uint8) uint8 {
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return (((a) & 1) + (((a) >> 1) & 1) + (((a) >> 2) & 1) + (((a) >> 3) & 1) + (((a) >> 4) & 1) + (((a) >> 5) & 1) + (((a) >> 6) & 1) + (((a) >> 7) & 1))
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}
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package raster
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var SUBPIXEL_OFFSETS_SAMPLE_8 = [8]float64{
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5 / 8, 0 / 8,
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3 / 8, 6 / 8,
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1 / 8, 4 / 8,
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7 / 8, 2 / 8,
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}
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var SUBPIXEL_OFFSETS_SAMPLE_16 = [16]float64{
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(1 / 16),
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(8 / 16),
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(4 / 16),
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(15 / 16),
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(11 / 16),
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(2 / 16),
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(6 / 16),
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(14 / 16),
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(10 / 16),
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(3 / 16),
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(7 / 16),
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(12 / 16),
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(0 / 16),
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(9 / 16),
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(5 / 16),
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(13 / 16),
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}
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var SUBPIXEL_OFFSETS_SAMPLE_32 = [32]float64{
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28 / 32,
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13 / 32,
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6 / 32,
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23 / 32,
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0 / 32,
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17 / 32,
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10 / 32,
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27 / 32,
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4 / 32,
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21 / 32,
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14 / 32,
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31 / 32,
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8 / 32,
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25 / 32,
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18 / 32,
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3 / 32,
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12 / 32,
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29 / 32,
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22 / 32,
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7 / 32,
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16 / 32,
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1 / 32,
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26 / 32,
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11 / 32,
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20 / 32,
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5 / 32,
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30 / 32,
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15 / 32,
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24 / 32,
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9 / 32,
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2 / 32,
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19 / 32,
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}
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var coverageTable = [256]uint8{
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pixelCoverage(0x00), pixelCoverage(0x01), pixelCoverage(0x02), pixelCoverage(0x03),
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pixelCoverage(0x04), pixelCoverage(0x05), pixelCoverage(0x06), pixelCoverage(0x07),
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pixelCoverage(0x08), pixelCoverage(0x09), pixelCoverage(0x0a), pixelCoverage(0x0b),
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pixelCoverage(0x0c), pixelCoverage(0x0d), pixelCoverage(0x0e), pixelCoverage(0x0f),
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pixelCoverage(0x10), pixelCoverage(0x11), pixelCoverage(0x12), pixelCoverage(0x13),
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pixelCoverage(0x14), pixelCoverage(0x15), pixelCoverage(0x16), pixelCoverage(0x17),
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pixelCoverage(0x18), pixelCoverage(0x19), pixelCoverage(0x1a), pixelCoverage(0x1b),
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pixelCoverage(0x1c), pixelCoverage(0x1d), pixelCoverage(0x1e), pixelCoverage(0x1f),
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pixelCoverage(0x20), pixelCoverage(0x21), pixelCoverage(0x22), pixelCoverage(0x23),
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pixelCoverage(0x24), pixelCoverage(0x25), pixelCoverage(0x26), pixelCoverage(0x27),
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pixelCoverage(0x28), pixelCoverage(0x29), pixelCoverage(0x2a), pixelCoverage(0x2b),
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pixelCoverage(0x2c), pixelCoverage(0x2d), pixelCoverage(0x2e), pixelCoverage(0x2f),
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pixelCoverage(0x30), pixelCoverage(0x31), pixelCoverage(0x32), pixelCoverage(0x33),
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pixelCoverage(0x34), pixelCoverage(0x35), pixelCoverage(0x36), pixelCoverage(0x37),
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pixelCoverage(0x38), pixelCoverage(0x39), pixelCoverage(0x3a), pixelCoverage(0x3b),
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pixelCoverage(0x3c), pixelCoverage(0x3d), pixelCoverage(0x3e), pixelCoverage(0x3f),
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pixelCoverage(0x40), pixelCoverage(0x41), pixelCoverage(0x42), pixelCoverage(0x43),
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pixelCoverage(0x44), pixelCoverage(0x45), pixelCoverage(0x46), pixelCoverage(0x47),
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pixelCoverage(0x48), pixelCoverage(0x49), pixelCoverage(0x4a), pixelCoverage(0x4b),
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pixelCoverage(0x4c), pixelCoverage(0x4d), pixelCoverage(0x4e), pixelCoverage(0x4f),
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pixelCoverage(0x50), pixelCoverage(0x51), pixelCoverage(0x52), pixelCoverage(0x53),
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pixelCoverage(0x54), pixelCoverage(0x55), pixelCoverage(0x56), pixelCoverage(0x57),
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pixelCoverage(0x58), pixelCoverage(0x59), pixelCoverage(0x5a), pixelCoverage(0x5b),
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pixelCoverage(0x5c), pixelCoverage(0x5d), pixelCoverage(0x5e), pixelCoverage(0x5f),
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pixelCoverage(0x60), pixelCoverage(0x61), pixelCoverage(0x62), pixelCoverage(0x63),
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pixelCoverage(0x64), pixelCoverage(0x65), pixelCoverage(0x66), pixelCoverage(0x67),
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pixelCoverage(0x68), pixelCoverage(0x69), pixelCoverage(0x6a), pixelCoverage(0x6b),
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pixelCoverage(0x6c), pixelCoverage(0x6d), pixelCoverage(0x6e), pixelCoverage(0x6f),
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pixelCoverage(0x70), pixelCoverage(0x71), pixelCoverage(0x72), pixelCoverage(0x73),
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pixelCoverage(0x74), pixelCoverage(0x75), pixelCoverage(0x76), pixelCoverage(0x77),
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pixelCoverage(0x78), pixelCoverage(0x79), pixelCoverage(0x7a), pixelCoverage(0x7b),
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pixelCoverage(0x7c), pixelCoverage(0x7d), pixelCoverage(0x7e), pixelCoverage(0x7f),
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pixelCoverage(0x80), pixelCoverage(0x81), pixelCoverage(0x82), pixelCoverage(0x83),
|
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pixelCoverage(0x84), pixelCoverage(0x85), pixelCoverage(0x86), pixelCoverage(0x87),
|
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pixelCoverage(0x88), pixelCoverage(0x89), pixelCoverage(0x8a), pixelCoverage(0x8b),
|
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pixelCoverage(0x8c), pixelCoverage(0x8d), pixelCoverage(0x8e), pixelCoverage(0x8f),
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pixelCoverage(0x90), pixelCoverage(0x91), pixelCoverage(0x92), pixelCoverage(0x93),
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pixelCoverage(0x94), pixelCoverage(0x95), pixelCoverage(0x96), pixelCoverage(0x97),
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pixelCoverage(0x98), pixelCoverage(0x99), pixelCoverage(0x9a), pixelCoverage(0x9b),
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pixelCoverage(0x9c), pixelCoverage(0x9d), pixelCoverage(0x9e), pixelCoverage(0x9f),
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pixelCoverage(0xa0), pixelCoverage(0xa1), pixelCoverage(0xa2), pixelCoverage(0xa3),
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pixelCoverage(0xa4), pixelCoverage(0xa5), pixelCoverage(0xa6), pixelCoverage(0xa7),
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pixelCoverage(0xa8), pixelCoverage(0xa9), pixelCoverage(0xaa), pixelCoverage(0xab),
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pixelCoverage(0xac), pixelCoverage(0xad), pixelCoverage(0xae), pixelCoverage(0xaf),
|
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pixelCoverage(0xb0), pixelCoverage(0xb1), pixelCoverage(0xb2), pixelCoverage(0xb3),
|
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pixelCoverage(0xb4), pixelCoverage(0xb5), pixelCoverage(0xb6), pixelCoverage(0xb7),
|
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pixelCoverage(0xb8), pixelCoverage(0xb9), pixelCoverage(0xba), pixelCoverage(0xbb),
|
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pixelCoverage(0xbc), pixelCoverage(0xbd), pixelCoverage(0xbe), pixelCoverage(0xbf),
|
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pixelCoverage(0xc0), pixelCoverage(0xc1), pixelCoverage(0xc2), pixelCoverage(0xc3),
|
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pixelCoverage(0xc4), pixelCoverage(0xc5), pixelCoverage(0xc6), pixelCoverage(0xc7),
|
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pixelCoverage(0xc8), pixelCoverage(0xc9), pixelCoverage(0xca), pixelCoverage(0xcb),
|
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pixelCoverage(0xcc), pixelCoverage(0xcd), pixelCoverage(0xce), pixelCoverage(0xcf),
|
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pixelCoverage(0xd0), pixelCoverage(0xd1), pixelCoverage(0xd2), pixelCoverage(0xd3),
|
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pixelCoverage(0xd4), pixelCoverage(0xd5), pixelCoverage(0xd6), pixelCoverage(0xd7),
|
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pixelCoverage(0xd8), pixelCoverage(0xd9), pixelCoverage(0xda), pixelCoverage(0xdb),
|
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pixelCoverage(0xdc), pixelCoverage(0xdd), pixelCoverage(0xde), pixelCoverage(0xdf),
|
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pixelCoverage(0xe0), pixelCoverage(0xe1), pixelCoverage(0xe2), pixelCoverage(0xe3),
|
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pixelCoverage(0xe4), pixelCoverage(0xe5), pixelCoverage(0xe6), pixelCoverage(0xe7),
|
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pixelCoverage(0xe8), pixelCoverage(0xe9), pixelCoverage(0xea), pixelCoverage(0xeb),
|
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pixelCoverage(0xec), pixelCoverage(0xed), pixelCoverage(0xee), pixelCoverage(0xef),
|
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pixelCoverage(0xf0), pixelCoverage(0xf1), pixelCoverage(0xf2), pixelCoverage(0xf3),
|
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pixelCoverage(0xf4), pixelCoverage(0xf5), pixelCoverage(0xf6), pixelCoverage(0xf7),
|
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pixelCoverage(0xf8), pixelCoverage(0xf9), pixelCoverage(0xfa), pixelCoverage(0xfb),
|
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pixelCoverage(0xfc), pixelCoverage(0xfd), pixelCoverage(0xfe), pixelCoverage(0xff),
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}
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func pixelCoverage(a uint8) uint8 {
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return (((a) & 1) + (((a) >> 1) & 1) + (((a) >> 2) & 1) + (((a) >> 3) & 1) + (((a) >> 4) & 1) + (((a) >> 5) & 1) + (((a) >> 6) & 1) + (((a) >> 7) & 1))
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}
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@ -8,11 +8,11 @@ import (
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)
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const (
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SUBPIXEL_SHIFT = 3
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SUBPIXEL_SHIFT = 4
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SUBPIXEL_COUNT = 1 << SUBPIXEL_SHIFT
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)
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var SUBPIXEL_OFFSETS = SUBPIXEL_OFFSETS_SAMPLE_8
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var SUBPIXEL_OFFSETS = SUBPIXEL_OFFSETS_SAMPLE_16
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type SUBPIXEL_DATA uint16
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type NON_ZERO_MASK_DATA_UNIT uint8
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@ -105,13 +105,13 @@ func (r *Rasterizer8BitsSample) RenderEvenOdd(img *image.RGBA, color *image.RGBA
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clipRect = intersect(clipRect, r.ClipBound)
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p := 0
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l := len(*polygon) / 2
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var edges [32]PolygonEdge
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for p < l {
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var edges [20]PolygonEdge
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edgeCount := polygon.getEdges(p, 10, edges[:], transform, clipRect)
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edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect)
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for k := 0; k < edgeCount; k++ {
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r.addEvenOddEdge(&(edges[k]))
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}
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p += 10
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p += 16
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}
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r.fillEvenOdd(img, color, clipRect)
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@ -121,11 +121,13 @@ func (r *Rasterizer8BitsSample) RenderEvenOdd(img *image.RGBA, color *image.RGBA
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func (r *Rasterizer8BitsSample) addEvenOddEdge(edge *PolygonEdge) {
|
||||
x := edge.X
|
||||
slope := edge.Slope
|
||||
var ySub, mask SUBPIXEL_DATA
|
||||
var xp, yLine int
|
||||
for y := edge.FirstLine; y <= edge.LastLine; y++ {
|
||||
ySub := SUBPIXEL_DATA(y & (SUBPIXEL_COUNT - 1))
|
||||
xp := (int)(x + SUBPIXEL_OFFSETS[ySub])
|
||||
mask := SUBPIXEL_DATA(1 << ySub)
|
||||
yLine := y >> SUBPIXEL_SHIFT
|
||||
ySub = SUBPIXEL_DATA(y & (SUBPIXEL_COUNT - 1))
|
||||
xp = (int)(x + SUBPIXEL_OFFSETS[ySub])
|
||||
mask = SUBPIXEL_DATA(1 << ySub)
|
||||
yLine = y >> SUBPIXEL_SHIFT
|
||||
r.MaskBuffer[yLine*r.BufferWidth+xp] ^= mask
|
||||
x += slope
|
||||
}
|
||||
|
|
@ -157,9 +159,131 @@ func (r *Rasterizer8BitsSample) fillEvenOdd(img *image.RGBA, color *image.RGBACo
|
|||
p := (*uint32)(unsafe.Pointer(&tp[x]))
|
||||
mask ^= r.MaskBuffer[y*uint32(r.BufferWidth)+x]
|
||||
// 8bits
|
||||
alpha := uint32(coverageTable[mask])
|
||||
//alpha := uint32(coverageTable[mask])
|
||||
// 16bits
|
||||
//alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff])
|
||||
alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff])
|
||||
// 32bits
|
||||
//alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff] + coverageTable[(mask >> 16) & 0xff] + coverageTable[(mask >> 24) & 0xff])
|
||||
|
||||
// alpha is in range of 0 to SUBPIXEL_COUNT
|
||||
invAlpha := uint32(SUBPIXEL_COUNT) - alpha
|
||||
|
||||
ct1 := (*p & 0xff00ff) * invAlpha
|
||||
ct2 := ((*p >> 8) & 0xff00ff) * invAlpha
|
||||
|
||||
ct1 = ((ct1 + cs1*alpha) >> SUBPIXEL_SHIFT) & 0xff00ff
|
||||
ct2 = ((ct2 + cs2*alpha) << (8 - SUBPIXEL_SHIFT)) & 0xff00ff00
|
||||
|
||||
*p = ct1 + ct2
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Renders the polygon with non-zero winding fill.
|
||||
* param aTarget the target bitmap.
|
||||
* param aPolygon the polygon to render.
|
||||
* param aColor the color to be used for rendering.
|
||||
* param aTransformation the transformation matrix.
|
||||
*/
|
||||
func (r *Rasterizer8BitsSample) RenderNonZeroWinding(img *image.RGBA, color *image.RGBAColor, polygon *Polygon, tr [6]float64) {
|
||||
|
||||
r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*r.Height)
|
||||
r.WindingBuffer = make([]NON_ZERO_MASK_DATA_UNIT, r.BufferWidth*r.Height*SUBPIXEL_COUNT)
|
||||
|
||||
// inline matrix multiplication
|
||||
transform := [6]float64{
|
||||
tr[0]*r.RemappingMatrix[0] + tr[1]*r.RemappingMatrix[2],
|
||||
tr[1]*r.RemappingMatrix[3] + tr[0]*r.RemappingMatrix[1],
|
||||
tr[2]*r.RemappingMatrix[0] + tr[3]*r.RemappingMatrix[2],
|
||||
tr[3]*r.RemappingMatrix[3] + tr[2]*r.RemappingMatrix[1],
|
||||
tr[4]*r.RemappingMatrix[0] + tr[5]*r.RemappingMatrix[2] + r.RemappingMatrix[4],
|
||||
tr[5]*r.RemappingMatrix[3] + tr[4]*r.RemappingMatrix[1] + r.RemappingMatrix[5],
|
||||
}
|
||||
|
||||
clipRect := clip(img.Bounds().Min.X, img.Bounds().Min.Y, img.Bounds().Dx(), img.Bounds().Dy(), SUBPIXEL_COUNT)
|
||||
clipRect = intersect(clipRect, r.ClipBound)
|
||||
|
||||
p := 0
|
||||
l := len(*polygon) / 2
|
||||
var edges [32]PolygonEdge
|
||||
for p < l {
|
||||
edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect)
|
||||
for k := 0; k < edgeCount; k++ {
|
||||
r.addNonZeroEdge(&(edges[k]))
|
||||
}
|
||||
p += 16
|
||||
}
|
||||
|
||||
r.fillNonZero(img, color, clipRect)
|
||||
}
|
||||
|
||||
//! Adds an edge to be used with non-zero winding fill.
|
||||
func (r *Rasterizer8BitsSample) addNonZeroEdge(edge *PolygonEdge) {
|
||||
x := edge.X
|
||||
slope := edge.Slope
|
||||
var ySub, mask SUBPIXEL_DATA
|
||||
var xp, yLine int
|
||||
winding := NON_ZERO_MASK_DATA_UNIT(edge.Winding)
|
||||
for y := edge.FirstLine; y <= edge.LastLine; y++ {
|
||||
ySub = SUBPIXEL_DATA(y & (SUBPIXEL_COUNT - 1))
|
||||
xp = (int)(x + SUBPIXEL_OFFSETS[ySub])
|
||||
mask = SUBPIXEL_DATA(1 << ySub)
|
||||
yLine = y >> SUBPIXEL_SHIFT
|
||||
r.MaskBuffer[yLine*r.BufferWidth+xp] |= mask
|
||||
r.WindingBuffer[(yLine*r.BufferWidth+xp)*SUBPIXEL_COUNT+int(ySub)] += winding
|
||||
x += slope
|
||||
}
|
||||
}
|
||||
|
||||
//! Renders the mask to the canvas with non-zero winding fill.
|
||||
func (r *Rasterizer8BitsSample) fillNonZero(img *image.RGBA, color *image.RGBAColor, clipBound [4]float64) {
|
||||
var x, y uint32
|
||||
|
||||
minX := uint32(clipBound[0])
|
||||
maxX := uint32(clipBound[2])
|
||||
|
||||
minY := uint32(clipBound[1]) >> SUBPIXEL_SHIFT
|
||||
maxY := uint32(clipBound[3]) >> SUBPIXEL_SHIFT
|
||||
|
||||
//pixColor := (uint32(color.R) << 24) | (uint32(color.G) << 16) | (uint32(color.B) << 8) | uint32(color.A)
|
||||
pixColor := (*uint32)(unsafe.Pointer(color))
|
||||
cs1 := *pixColor & 0xff00ff
|
||||
cs2 := (*pixColor >> 8) & 0xff00ff
|
||||
|
||||
stride := uint32(img.Stride)
|
||||
var mask SUBPIXEL_DATA
|
||||
var n uint32
|
||||
var values [SUBPIXEL_COUNT]NON_ZERO_MASK_DATA_UNIT
|
||||
for n = 0; n < SUBPIXEL_COUNT; n++ {
|
||||
values[n] = 0
|
||||
}
|
||||
|
||||
for y = minY; y < maxY; y++ {
|
||||
tp := img.Pix[y*stride:]
|
||||
|
||||
mask = 0
|
||||
for x = minX; x <= maxX; x++ {
|
||||
p := (*uint32)(unsafe.Pointer(&tp[x]))
|
||||
temp := r.MaskBuffer[y*uint32(r.BufferWidth)+x]
|
||||
if temp != 0 {
|
||||
var bit SUBPIXEL_DATA = 1
|
||||
for n = 0; n < SUBPIXEL_COUNT; n++ {
|
||||
if (temp & bit) != 0 {
|
||||
t := values[n]
|
||||
values[n] += r.WindingBuffer[(y*uint32(r.BufferWidth)+x)*SUBPIXEL_COUNT+n]
|
||||
if (t == 0 || values[n] == 0 )&& t != values[n] {
|
||||
mask ^= bit
|
||||
}
|
||||
}
|
||||
bit <<= 1
|
||||
}
|
||||
}
|
||||
|
||||
// 8bits
|
||||
//alpha := uint32(coverageTable[mask])
|
||||
// 16bits
|
||||
alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff])
|
||||
// 32bits
|
||||
//alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff] + coverageTable[(mask >> 16) & 0xff] + coverageTable[(mask >> 24) & 0xff])
|
||||
|
||||
|
|
|
|||
|
|
@ -1,55 +1,55 @@
|
|||
// Copyright 2011 The draw2d Authors. All rights reserved.
|
||||
// created: 27/05/2011 by Laurent Le Goff
|
||||
package raster
|
||||
|
||||
import (
|
||||
"exp/draw"
|
||||
"image"
|
||||
)
|
||||
|
||||
func abs(i int) int {
|
||||
if i < 0 {
|
||||
return -i
|
||||
}
|
||||
return i
|
||||
}
|
||||
|
||||
func PolylineBresenham(img draw.Image, c image.Color, s ...float64) {
|
||||
for i := 2; i < len(s); i += 2 {
|
||||
Bresenham(img, c, int(s[i-2]+0.5), int(s[i-1]+0.5), int(s[i]+0.5), int(s[i+1]+0.5))
|
||||
}
|
||||
}
|
||||
|
||||
func Bresenham(img draw.Image, color image.Color, x0, y0, x1, y1 int) {
|
||||
dx := abs(x1 - x0)
|
||||
dy := abs(y1 - y0)
|
||||
var sx, sy int
|
||||
if x0 < x1 {
|
||||
sx = 1
|
||||
} else {
|
||||
sx = -1
|
||||
}
|
||||
if y0 < y1 {
|
||||
sy = 1
|
||||
} else {
|
||||
sy = -1
|
||||
}
|
||||
err := dx - dy
|
||||
|
||||
var e2 int
|
||||
for {
|
||||
img.Set(x0, y0, color)
|
||||
if x0 == x1 && y0 == y1 {
|
||||
return
|
||||
}
|
||||
e2 = 2 * err
|
||||
if e2 > -dy {
|
||||
err = err - dy
|
||||
x0 = x0 + sx
|
||||
}
|
||||
if e2 < dx {
|
||||
err = err + dx
|
||||
y0 = y0 + sy
|
||||
}
|
||||
}
|
||||
}
|
||||
package raster
|
||||
|
||||
import (
|
||||
"exp/draw"
|
||||
"image"
|
||||
)
|
||||
|
||||
func abs(i int) int {
|
||||
if i < 0 {
|
||||
return -i
|
||||
}
|
||||
return i
|
||||
}
|
||||
|
||||
func PolylineBresenham(img draw.Image, c image.Color, s ...float64) {
|
||||
for i := 2; i < len(s); i += 2 {
|
||||
Bresenham(img, c, int(s[i-2]+0.5), int(s[i-1]+0.5), int(s[i]+0.5), int(s[i+1]+0.5))
|
||||
}
|
||||
}
|
||||
|
||||
func Bresenham(img draw.Image, color image.Color, x0, y0, x1, y1 int) {
|
||||
dx := abs(x1 - x0)
|
||||
dy := abs(y1 - y0)
|
||||
var sx, sy int
|
||||
if x0 < x1 {
|
||||
sx = 1
|
||||
} else {
|
||||
sx = -1
|
||||
}
|
||||
if y0 < y1 {
|
||||
sy = 1
|
||||
} else {
|
||||
sy = -1
|
||||
}
|
||||
err := dx - dy
|
||||
|
||||
var e2 int
|
||||
for {
|
||||
img.Set(x0, y0, color)
|
||||
if x0 == x1 && y0 == y1 {
|
||||
return
|
||||
}
|
||||
e2 = 2 * err
|
||||
if e2 > -dy {
|
||||
err = err - dy
|
||||
x0 = x0 + sx
|
||||
}
|
||||
if e2 < dx {
|
||||
err = err + dx
|
||||
y0 = y0 + sy
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,29 +1,29 @@
|
|||
// Copyright 2011 The draw2d Authors. All rights reserved.
|
||||
// created: 27/05/2011 by Laurent Le Goff
|
||||
package raster
|
||||
|
||||
import (
|
||||
"math"
|
||||
)
|
||||
|
||||
const (
|
||||
POLYGON_CLIP_NONE = iota
|
||||
POLYGON_CLIP_LEFT
|
||||
POLYGON_CLIP_RIGHT
|
||||
POLYGON_CLIP_TOP
|
||||
POLYGON_CLIP_BOTTOM
|
||||
)
|
||||
|
||||
type Polygon []float64
|
||||
|
||||
|
||||
type PolygonEdge struct {
|
||||
X, Slope float64
|
||||
FirstLine, LastLine int
|
||||
Winding int16
|
||||
}
|
||||
|
||||
|
||||
package raster
|
||||
|
||||
import (
|
||||
"math"
|
||||
)
|
||||
|
||||
const (
|
||||
POLYGON_CLIP_NONE = iota
|
||||
POLYGON_CLIP_LEFT
|
||||
POLYGON_CLIP_RIGHT
|
||||
POLYGON_CLIP_TOP
|
||||
POLYGON_CLIP_BOTTOM
|
||||
)
|
||||
|
||||
type Polygon []float64
|
||||
|
||||
|
||||
type PolygonEdge struct {
|
||||
X, Slope float64
|
||||
FirstLine, LastLine int
|
||||
Winding int16
|
||||
}
|
||||
|
||||
|
||||
//! Calculates the edges of the polygon with transformation and clipping to edges array.
|
||||
/*! \param startIndex the index for the first vertex.
|
||||
* \param vertexCount the amount of vertices to convert.
|
||||
|
|
@ -31,159 +31,159 @@ type PolygonEdge struct {
|
|||
* \param tr the transformation matrix for the polygon.
|
||||
* \param aClipRectangle the clip rectangle.
|
||||
* \return the amount of edges in the result.
|
||||
*/
|
||||
func (p Polygon) getEdges(startIndex, vertexCount int, edges []PolygonEdge, tr [6]float64, clipBound [4]float64) int {
|
||||
startIndex = startIndex * 2
|
||||
endIndex := startIndex + (vertexCount * 2)
|
||||
if endIndex > len(p) {
|
||||
endIndex = len(p)
|
||||
}
|
||||
|
||||
x := p[startIndex]
|
||||
y := p[startIndex+1]
|
||||
*/
|
||||
func (p Polygon) getEdges(startIndex, vertexCount int, edges []PolygonEdge, tr [6]float64, clipBound [4]float64) int {
|
||||
startIndex = startIndex * 2
|
||||
endIndex := startIndex + (vertexCount * 2)
|
||||
if endIndex > len(p) {
|
||||
endIndex = len(p)
|
||||
}
|
||||
|
||||
x := p[startIndex]
|
||||
y := p[startIndex+1]
|
||||
// inline transformation
|
||||
prevX := x*tr[0] + y*tr[2] + tr[4]
|
||||
prevY := x*tr[1] + y*tr[3] + tr[5]
|
||||
|
||||
prevX := x*tr[0] + y*tr[2] + tr[4]
|
||||
prevY := x*tr[1] + y*tr[3] + tr[5]
|
||||
|
||||
//! Calculates the clip flags for a point.
|
||||
prevClipFlags := POLYGON_CLIP_NONE
|
||||
if prevX < clipBound[0] {
|
||||
prevClipFlags |= POLYGON_CLIP_LEFT
|
||||
} else if prevX >= clipBound[2] {
|
||||
prevClipFlags |= POLYGON_CLIP_RIGHT
|
||||
}
|
||||
|
||||
if prevY < clipBound[1] {
|
||||
prevClipFlags |= POLYGON_CLIP_TOP
|
||||
} else if prevY >= clipBound[3] {
|
||||
prevClipFlags |= POLYGON_CLIP_BOTTOM
|
||||
}
|
||||
|
||||
edgeCount := 0
|
||||
var k, clipFlags, clipSum, clipUnion int
|
||||
var xleft, yleft, xright, yright, oldY, maxX, minX float64
|
||||
var swapWinding int16
|
||||
for n := startIndex; n < endIndex; n = n + 2 {
|
||||
k = (n + 2) % len(p)
|
||||
x = p[k]*tr[0] + p[k+1]*tr[2] + tr[4]
|
||||
y = p[k]*tr[1] + p[k+1]*tr[3] + tr[5]
|
||||
|
||||
prevClipFlags := POLYGON_CLIP_NONE
|
||||
if prevX < clipBound[0] {
|
||||
prevClipFlags |= POLYGON_CLIP_LEFT
|
||||
} else if prevX >= clipBound[2] {
|
||||
prevClipFlags |= POLYGON_CLIP_RIGHT
|
||||
}
|
||||
|
||||
if prevY < clipBound[1] {
|
||||
prevClipFlags |= POLYGON_CLIP_TOP
|
||||
} else if prevY >= clipBound[3] {
|
||||
prevClipFlags |= POLYGON_CLIP_BOTTOM
|
||||
}
|
||||
|
||||
edgeCount := 0
|
||||
var k, clipFlags, clipSum, clipUnion int
|
||||
var xleft, yleft, xright, yright, oldY, maxX, minX float64
|
||||
var swapWinding int16
|
||||
for n := startIndex; n < endIndex; n = n + 2 {
|
||||
k = (n + 2) % len(p)
|
||||
x = p[k]*tr[0] + p[k+1]*tr[2] + tr[4]
|
||||
y = p[k]*tr[1] + p[k+1]*tr[3] + tr[5]
|
||||
|
||||
//! Calculates the clip flags for a point.
|
||||
clipFlags = POLYGON_CLIP_NONE
|
||||
if prevX < clipBound[0] {
|
||||
clipFlags |= POLYGON_CLIP_LEFT
|
||||
} else if prevX >= clipBound[2] {
|
||||
clipFlags |= POLYGON_CLIP_RIGHT
|
||||
}
|
||||
if prevY < clipBound[1] {
|
||||
clipFlags |= POLYGON_CLIP_TOP
|
||||
} else if prevY >= clipBound[3] {
|
||||
clipFlags |= POLYGON_CLIP_BOTTOM
|
||||
}
|
||||
|
||||
clipSum = prevClipFlags | clipFlags
|
||||
clipUnion = prevClipFlags & clipFlags
|
||||
|
||||
clipFlags = POLYGON_CLIP_NONE
|
||||
if prevX < clipBound[0] {
|
||||
clipFlags |= POLYGON_CLIP_LEFT
|
||||
} else if prevX >= clipBound[2] {
|
||||
clipFlags |= POLYGON_CLIP_RIGHT
|
||||
}
|
||||
if prevY < clipBound[1] {
|
||||
clipFlags |= POLYGON_CLIP_TOP
|
||||
} else if prevY >= clipBound[3] {
|
||||
clipFlags |= POLYGON_CLIP_BOTTOM
|
||||
}
|
||||
|
||||
clipSum = prevClipFlags | clipFlags
|
||||
clipUnion = prevClipFlags & clipFlags
|
||||
|
||||
// Skip all edges that are either completely outside at the top or at the bottom.
|
||||
if (clipUnion & (POLYGON_CLIP_TOP | POLYGON_CLIP_BOTTOM)) == 0 {
|
||||
if (clipUnion & POLYGON_CLIP_RIGHT) != 0 {
|
||||
if (clipUnion & (POLYGON_CLIP_TOP | POLYGON_CLIP_BOTTOM)) == 0 {
|
||||
if (clipUnion & POLYGON_CLIP_RIGHT) != 0 {
|
||||
// Both clip to right, edge is a vertical line on the right side
|
||||
if getVerticalEdge(prevY, y, clipBound[2], &(edges[edgeCount]), clipBound) {
|
||||
edgeCount++
|
||||
}
|
||||
} else if (clipUnion & POLYGON_CLIP_LEFT) != 0 {
|
||||
if getVerticalEdge(prevY, y, clipBound[2], &(edges[edgeCount]), clipBound) {
|
||||
edgeCount++
|
||||
}
|
||||
} else if (clipUnion & POLYGON_CLIP_LEFT) != 0 {
|
||||
// Both clip to left, edge is a vertical line on the left side
|
||||
if getVerticalEdge(prevY, y, clipBound[0], &(edges[edgeCount]), clipBound) {
|
||||
edgeCount++
|
||||
}
|
||||
} else if (clipSum & (POLYGON_CLIP_RIGHT | POLYGON_CLIP_LEFT)) == 0 {
|
||||
if getVerticalEdge(prevY, y, clipBound[0], &(edges[edgeCount]), clipBound) {
|
||||
edgeCount++
|
||||
}
|
||||
} else if (clipSum & (POLYGON_CLIP_RIGHT | POLYGON_CLIP_LEFT)) == 0 {
|
||||
// No clipping in the horizontal direction
|
||||
if getEdge(prevX, prevY, x, y, &(edges[edgeCount]), clipBound) {
|
||||
edgeCount++
|
||||
}
|
||||
} else {
|
||||
if getEdge(prevX, prevY, x, y, &(edges[edgeCount]), clipBound) {
|
||||
edgeCount++
|
||||
}
|
||||
} else {
|
||||
// Clips to left or right or both.
|
||||
|
||||
if x < prevX {
|
||||
xleft, yleft = x, y
|
||||
xright, yright = prevX, prevY
|
||||
swapWinding = -1
|
||||
} else {
|
||||
xleft, yleft = prevX, prevY
|
||||
xright, yright = x, y
|
||||
swapWinding = 1
|
||||
}
|
||||
|
||||
slope := (yright - yleft) / (xright - xleft)
|
||||
|
||||
if (clipSum & POLYGON_CLIP_RIGHT) != 0 {
|
||||
|
||||
if x < prevX {
|
||||
xleft, yleft = x, y
|
||||
xright, yright = prevX, prevY
|
||||
swapWinding = -1
|
||||
} else {
|
||||
xleft, yleft = prevX, prevY
|
||||
xright, yright = x, y
|
||||
swapWinding = 1
|
||||
}
|
||||
|
||||
slope := (yright - yleft) / (xright - xleft)
|
||||
|
||||
if (clipSum & POLYGON_CLIP_RIGHT) != 0 {
|
||||
// calculate new position for the right vertex
|
||||
oldY = yright
|
||||
maxX = clipBound[2]
|
||||
|
||||
yright = yleft + (maxX-xleft)*slope
|
||||
xright = maxX
|
||||
|
||||
oldY = yright
|
||||
maxX = clipBound[2]
|
||||
|
||||
yright = yleft + (maxX-xleft)*slope
|
||||
xright = maxX
|
||||
|
||||
// add vertical edge for the overflowing part
|
||||
if getVerticalEdge(yright, oldY, maxX, &(edges[edgeCount]), clipBound) {
|
||||
edges[edgeCount].Winding *= swapWinding
|
||||
edgeCount++
|
||||
}
|
||||
}
|
||||
|
||||
if (clipSum & POLYGON_CLIP_LEFT) != 0 {
|
||||
if getVerticalEdge(yright, oldY, maxX, &(edges[edgeCount]), clipBound) {
|
||||
edges[edgeCount].Winding *= swapWinding
|
||||
edgeCount++
|
||||
}
|
||||
}
|
||||
|
||||
if (clipSum & POLYGON_CLIP_LEFT) != 0 {
|
||||
// calculate new position for the left vertex
|
||||
oldY = yleft
|
||||
minX = clipBound[0]
|
||||
|
||||
yleft = yleft + (minX-xleft)*slope
|
||||
xleft = minX
|
||||
|
||||
oldY = yleft
|
||||
minX = clipBound[0]
|
||||
|
||||
yleft = yleft + (minX-xleft)*slope
|
||||
xleft = minX
|
||||
|
||||
// add vertical edge for the overflowing part
|
||||
if getVerticalEdge(oldY, yleft, minX, &(edges[edgeCount]), clipBound) {
|
||||
edges[edgeCount].Winding *= swapWinding
|
||||
edgeCount++
|
||||
}
|
||||
}
|
||||
|
||||
if getEdge(xleft, yleft, xright, yright, &(edges[edgeCount]), clipBound) {
|
||||
edges[edgeCount].Winding *= swapWinding
|
||||
edgeCount++
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
prevClipFlags = clipFlags
|
||||
prevX = x
|
||||
prevY = y
|
||||
}
|
||||
|
||||
return edgeCount
|
||||
}
|
||||
|
||||
|
||||
if getVerticalEdge(oldY, yleft, minX, &(edges[edgeCount]), clipBound) {
|
||||
edges[edgeCount].Winding *= swapWinding
|
||||
edgeCount++
|
||||
}
|
||||
}
|
||||
|
||||
if getEdge(xleft, yleft, xright, yright, &(edges[edgeCount]), clipBound) {
|
||||
edges[edgeCount].Winding *= swapWinding
|
||||
edgeCount++
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
prevClipFlags = clipFlags
|
||||
prevX = x
|
||||
prevY = y
|
||||
}
|
||||
|
||||
return edgeCount
|
||||
}
|
||||
|
||||
|
||||
//! Creates a polygon edge between two vectors.
|
||||
/*! Clips the edge vertically to the clip rectangle. Returns true for edges that
|
||||
* should be rendered, false for others.
|
||||
*/
|
||||
func getEdge(x0, y0, x1, y1 float64, edge *PolygonEdge, clipBound [4]float64) bool {
|
||||
var startX, startY, endX, endY float64
|
||||
var winding int16
|
||||
|
||||
if y0 <= y1 {
|
||||
startX = x0
|
||||
startY = y0
|
||||
endX = x1
|
||||
endY = y1
|
||||
winding = 1
|
||||
} else {
|
||||
startX = x1
|
||||
startY = y1
|
||||
endX = x0
|
||||
endY = y0
|
||||
winding = -1
|
||||
}
|
||||
|
||||
*/
|
||||
func getEdge(x0, y0, x1, y1 float64, edge *PolygonEdge, clipBound [4]float64) bool {
|
||||
var startX, startY, endX, endY float64
|
||||
var winding int16
|
||||
|
||||
if y0 <= y1 {
|
||||
startX = x0
|
||||
startY = y0
|
||||
endX = x1
|
||||
endY = y1
|
||||
winding = 1
|
||||
} else {
|
||||
startX = x1
|
||||
startY = y1
|
||||
endX = x0
|
||||
endY = y0
|
||||
winding = -1
|
||||
}
|
||||
|
||||
// Essentially, firstLine is floor(startY + 1) and lastLine is floor(endY).
|
||||
// These are refactored to integer casts in order to avoid function
|
||||
// calls. The difference with integer cast is that numbers are always
|
||||
|
|
@ -191,83 +191,83 @@ func getEdge(x0, y0, x1, y1 float64, edge *PolygonEdge, clipBound [4]float64) bo
|
|||
// only coordinates between 0 and -1 require greater attention as they
|
||||
// also round to zero. The problems in this range can be avoided by
|
||||
// adding one to the values before conversion and subtracting after it.
|
||||
|
||||
firstLine := int(math.Floor(startY)) + 1
|
||||
lastLine := int(math.Floor(endY))
|
||||
|
||||
minClip := int(clipBound[1])
|
||||
maxClip := int(clipBound[3])
|
||||
|
||||
|
||||
firstLine := int(math.Floor(startY)) + 1
|
||||
lastLine := int(math.Floor(endY))
|
||||
|
||||
minClip := int(clipBound[1])
|
||||
maxClip := int(clipBound[3])
|
||||
|
||||
// If start and end are on the same line, the edge doesn't cross
|
||||
// any lines and thus can be ignored.
|
||||
// If the end is smaller than the first line, edge is out.
|
||||
// If the start is larger than the last line, edge is out.
|
||||
if firstLine > lastLine || lastLine < minClip || firstLine >= maxClip {
|
||||
return false
|
||||
}
|
||||
|
||||
if firstLine > lastLine || lastLine < minClip || firstLine >= maxClip {
|
||||
return false
|
||||
}
|
||||
|
||||
// Adjust the start based on the target.
|
||||
if firstLine < minClip {
|
||||
firstLine = minClip
|
||||
}
|
||||
|
||||
if lastLine >= maxClip {
|
||||
lastLine = maxClip - 1
|
||||
}
|
||||
edge.Slope = (endX - startX) / (endY - startY)
|
||||
edge.X = startX + (float64(firstLine)-startY)*edge.Slope
|
||||
edge.Winding = winding
|
||||
edge.FirstLine = firstLine
|
||||
edge.LastLine = lastLine
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
|
||||
if firstLine < minClip {
|
||||
firstLine = minClip
|
||||
}
|
||||
|
||||
if lastLine >= maxClip {
|
||||
lastLine = maxClip - 1
|
||||
}
|
||||
edge.Slope = (endX - startX) / (endY - startY)
|
||||
edge.X = startX + (float64(firstLine)-startY)*edge.Slope
|
||||
edge.Winding = winding
|
||||
edge.FirstLine = firstLine
|
||||
edge.LastLine = lastLine
|
||||
|
||||
return true
|
||||
}
|
||||
|
||||
|
||||
//! Creates a vertical polygon edge between two y values.
|
||||
/*! Clips the edge vertically to the clip rectangle. Returns true for edges that
|
||||
* should be rendered, false for others.
|
||||
*/
|
||||
func getVerticalEdge(startY, endY, x float64, edge *PolygonEdge, clipBound [4]float64) bool {
|
||||
var start, end float64
|
||||
var winding int16
|
||||
if startY < endY {
|
||||
start = startY
|
||||
end = endY
|
||||
winding = 1
|
||||
} else {
|
||||
start = endY
|
||||
end = startY
|
||||
winding = -1
|
||||
}
|
||||
|
||||
firstLine := int(math.Floor(start)) + 1
|
||||
lastLine := int(math.Floor(end))
|
||||
|
||||
minClip := int(clipBound[1])
|
||||
maxClip := int(clipBound[3])
|
||||
|
||||
*/
|
||||
func getVerticalEdge(startY, endY, x float64, edge *PolygonEdge, clipBound [4]float64) bool {
|
||||
var start, end float64
|
||||
var winding int16
|
||||
if startY < endY {
|
||||
start = startY
|
||||
end = endY
|
||||
winding = 1
|
||||
} else {
|
||||
start = endY
|
||||
end = startY
|
||||
winding = -1
|
||||
}
|
||||
|
||||
firstLine := int(math.Floor(start)) + 1
|
||||
lastLine := int(math.Floor(end))
|
||||
|
||||
minClip := int(clipBound[1])
|
||||
maxClip := int(clipBound[3])
|
||||
|
||||
// If start and end are on the same line, the edge doesn't cross
|
||||
// any lines and thus can be ignored.
|
||||
// If the end is smaller than the first line, edge is out.
|
||||
// If the start is larger than the last line, edge is out.
|
||||
if firstLine > lastLine || lastLine < minClip || firstLine >= maxClip {
|
||||
return false
|
||||
}
|
||||
|
||||
if firstLine > lastLine || lastLine < minClip || firstLine >= maxClip {
|
||||
return false
|
||||
}
|
||||
|
||||
// Adjust the start based on the clip rect.
|
||||
if firstLine < minClip {
|
||||
firstLine = minClip
|
||||
}
|
||||
if lastLine >= maxClip {
|
||||
lastLine = maxClip - 1
|
||||
}
|
||||
|
||||
edge.Slope = 0
|
||||
edge.X = x
|
||||
edge.Winding = winding
|
||||
edge.FirstLine = firstLine
|
||||
edge.LastLine = lastLine
|
||||
|
||||
return true
|
||||
}
|
||||
if firstLine < minClip {
|
||||
firstLine = minClip
|
||||
}
|
||||
if lastLine >= maxClip {
|
||||
lastLine = maxClip - 1
|
||||
}
|
||||
|
||||
edge.Slope = 0
|
||||
edge.X = x
|
||||
edge.Winding = winding
|
||||
edge.FirstLine = firstLine
|
||||
edge.LastLine = lastLine
|
||||
|
||||
return true
|
||||
}
|
||||
|
|
|
|||
|
|
@ -49,23 +49,6 @@ func (p *Path) LineTo(x, y float64) {
|
|||
p.points[len(p.points)-1] = y
|
||||
}
|
||||
|
||||
func TestRasterizer8BitsSample(t *testing.T) {
|
||||
img := image.NewRGBA(200, 200)
|
||||
var p Path
|
||||
p.LineTo(10, 190)
|
||||
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
|
||||
c.Segment(&p, flattening_threshold)
|
||||
poly := Polygon(p.points)
|
||||
color := image.RGBAColor{0, 0, 0, 0xff}
|
||||
tr := [6]float64{1, 0, 0, 1, 0, 0}
|
||||
r := NewRasterizer8BitsSample(200, 200)
|
||||
//PolylineBresenham(img, image.Black, poly...)
|
||||
|
||||
|
||||
r.RenderEvenOdd(img, &color, &poly, tr)
|
||||
savepng("_testRasterizer8BitsSample.png", img)
|
||||
}
|
||||
|
||||
func TestFreetype(t *testing.T) {
|
||||
var p Path
|
||||
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
|
||||
|
|
@ -87,7 +70,8 @@ func TestFreetype(t *testing.T) {
|
|||
savepng("_testFreetype.png", img)
|
||||
}
|
||||
|
||||
func BenchmarkRasterizer8BitsSample(b *testing.B) {
|
||||
func TestRasterizer(t *testing.T) {
|
||||
img := image.NewRGBA(200, 200)
|
||||
var p Path
|
||||
p.LineTo(10, 190)
|
||||
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
|
||||
|
|
@ -95,11 +79,29 @@ func BenchmarkRasterizer8BitsSample(b *testing.B) {
|
|||
poly := Polygon(p.points)
|
||||
color := image.RGBAColor{0, 0, 0, 0xff}
|
||||
tr := [6]float64{1, 0, 0, 1, 0, 0}
|
||||
for i := 0; i < b.N; i++ {
|
||||
img := image.NewRGBA(200, 200)
|
||||
rasterizer := NewRasterizer8BitsSample(200, 200)
|
||||
rasterizer.RenderEvenOdd(img, &color, &poly, tr)
|
||||
}
|
||||
r := NewRasterizer8BitsSample(200, 200)
|
||||
//PolylineBresenham(img, image.Black, poly...)
|
||||
|
||||
|
||||
r.RenderEvenOdd(img, &color, &poly, tr)
|
||||
savepng("_testRasterizer.png", img)
|
||||
}
|
||||
|
||||
func TestRasterizerNonZeroWinding(t *testing.T) {
|
||||
img := image.NewRGBA(200, 200)
|
||||
var p Path
|
||||
p.LineTo(10, 190)
|
||||
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
|
||||
c.Segment(&p, flattening_threshold)
|
||||
poly := Polygon(p.points)
|
||||
color := image.RGBAColor{0, 0, 0, 0xff}
|
||||
tr := [6]float64{1, 0, 0, 1, 0, 0}
|
||||
r := NewRasterizer8BitsSample(200, 200)
|
||||
//PolylineBresenham(img, image.Black, poly...)
|
||||
|
||||
|
||||
r.RenderNonZeroWinding(img, &color, &poly, tr)
|
||||
savepng("_testRasterizerNonZeroWinding.png", img)
|
||||
}
|
||||
|
||||
func BenchmarkFreetype(b *testing.B) {
|
||||
|
|
@ -122,3 +124,34 @@ func BenchmarkFreetype(b *testing.B) {
|
|||
rasterizer.Rasterize(painter)
|
||||
}
|
||||
}
|
||||
|
||||
func BenchmarkRasterizerNonZeroWinding(b *testing.B) {
|
||||
var p Path
|
||||
p.LineTo(10, 190)
|
||||
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
|
||||
c.Segment(&p, flattening_threshold)
|
||||
poly := Polygon(p.points)
|
||||
color := image.RGBAColor{0, 0, 0, 0xff}
|
||||
tr := [6]float64{1, 0, 0, 1, 0, 0}
|
||||
for i := 0; i < b.N; i++ {
|
||||
img := image.NewRGBA(200, 200)
|
||||
rasterizer := NewRasterizer8BitsSample(200, 200)
|
||||
rasterizer.RenderNonZeroWinding(img, &color, &poly, tr)
|
||||
}
|
||||
}
|
||||
|
||||
func BenchmarkRasterizer(b *testing.B) {
|
||||
var p Path
|
||||
p.LineTo(10, 190)
|
||||
c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190}
|
||||
c.Segment(&p, flattening_threshold)
|
||||
poly := Polygon(p.points)
|
||||
color := image.RGBAColor{0, 0, 0, 0xff}
|
||||
tr := [6]float64{1, 0, 0, 1, 0, 0}
|
||||
for i := 0; i < b.N; i++ {
|
||||
img := image.NewRGBA(200, 200)
|
||||
rasterizer := NewRasterizer8BitsSample(200, 200)
|
||||
rasterizer.RenderEvenOdd(img, &color, &poly, tr)
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue