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1 /* |
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2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 #include "math.h" |
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27 #include "GraphicsPrimitiveMgr.h" |
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28 |
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29 #include "sun_java2d_loops_FillParallelogram.h" |
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30 |
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31 #define PGRAM_MIN_MAX(bmin, bmax, v0, dv1, dv2) \ |
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32 do { \ |
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33 double vmin, vmax; \ |
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34 if (dv1 < 0) { \ |
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35 vmin = v0+dv1; \ |
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36 vmax = v0; \ |
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37 } else { \ |
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38 vmin = v0; \ |
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39 vmax = v0+dv1; \ |
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40 } \ |
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41 if (dv2 < 0) { \ |
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42 vmin -= dv2; \ |
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43 } else { \ |
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44 vmax += dv2; \ |
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45 } \ |
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46 bmin = (jint) floor(vmin + 0.5); \ |
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47 bmax = (jint) floor(vmax + 0.5); \ |
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48 } while(0) |
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49 |
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50 #define PGRAM_INIT_X(starty, x, y, slope) \ |
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51 (DblToLong((x) + (slope) * ((starty)+0.5 - (y))) + LongOneHalf - 1) |
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52 |
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53 /* |
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54 * Class: sun_java2d_loops_FillParallelogram |
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55 * Method: FillParallelogram |
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56 * Signature: (Lsun/java2d/SunGraphics2D;Lsun/java2d/SurfaceData;DDDDDD)V |
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57 */ |
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58 JNIEXPORT void JNICALL |
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59 Java_sun_java2d_loops_FillParallelogram_FillParallelogram |
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60 (JNIEnv *env, jobject self, |
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61 jobject sg2d, jobject sData, |
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62 jdouble x0, jdouble y0, |
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63 jdouble dx1, jdouble dy1, |
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64 jdouble dx2, jdouble dy2) |
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65 { |
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66 SurfaceDataOps *sdOps; |
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67 SurfaceDataRasInfo rasInfo; |
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68 NativePrimitive *pPrim; |
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69 CompositeInfo compInfo; |
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70 jint pixel; |
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71 jint ix1, iy1, ix2, iy2; |
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72 |
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73 if ((dy1 == 0 && dx1 == 0) || (dy2 == 0 && dx2 == 0)) { |
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74 return; |
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75 } |
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76 |
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77 /* |
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78 * Sort parallelogram by y values, ensure that each delta vector |
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79 * has a non-negative y delta, and eliminate degenerate parallelograms. |
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80 */ |
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81 if (dy1 < 0) { |
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82 x0 += dx1; y0 += dy1; |
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83 dx1 = -dx1; dy1 = -dy1; |
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84 } |
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85 if (dy2 < 0) { |
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86 x0 += dx2; y0 += dy2; |
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87 dx2 = -dx2; dy2 = -dy2; |
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88 } |
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89 /* Sort delta vectors so dxy1 is left of dxy2. */ |
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90 if (dx1 * dy2 > dx2 * dy1) { |
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91 double v = dx1; dx1 = dx2; dx2 = v; |
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92 v = dy1; dy1 = dy2; dy2 = v; |
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93 } |
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94 PGRAM_MIN_MAX(ix1, ix2, x0, dx1, dx2); |
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95 iy1 = (jint) floor(y0 + 0.5); |
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96 iy2 = (jint) floor(y0 + dy1 + dy2 + 0.5); |
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97 |
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98 pPrim = GetNativePrim(env, self); |
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99 if (pPrim == NULL) { |
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100 return; |
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101 } |
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102 pixel = GrPrim_Sg2dGetPixel(env, sg2d); |
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103 if (pPrim->pCompType->getCompInfo != NULL) { |
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104 GrPrim_Sg2dGetCompInfo(env, sg2d, pPrim, &compInfo); |
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105 } |
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106 |
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107 sdOps = SurfaceData_GetOps(env, sData); |
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108 if (sdOps == NULL) { |
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109 return; |
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110 } |
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111 |
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112 GrPrim_Sg2dGetClip(env, sg2d, &rasInfo.bounds); |
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113 SurfaceData_IntersectBoundsXYXY(&rasInfo.bounds, ix1, iy1, ix2, iy2); |
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114 if (rasInfo.bounds.y2 <= rasInfo.bounds.y1 || |
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115 rasInfo.bounds.x2 <= rasInfo.bounds.x1) |
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116 { |
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117 return; |
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118 } |
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119 |
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120 if (sdOps->Lock(env, sdOps, &rasInfo, pPrim->dstflags) != SD_SUCCESS) { |
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121 return; |
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122 } |
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123 |
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124 ix1 = rasInfo.bounds.x1; |
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125 iy1 = rasInfo.bounds.y1; |
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126 ix2 = rasInfo.bounds.x2; |
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127 iy2 = rasInfo.bounds.y2; |
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128 if (ix2 > ix1 && iy2 > iy1) { |
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129 sdOps->GetRasInfo(env, sdOps, &rasInfo); |
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130 if (rasInfo.rasBase) { |
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131 jdouble lslope = (dy1 == 0) ? 0 : dx1 / dy1; |
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132 jdouble rslope = (dy2 == 0) ? 0 : dx2 / dy2; |
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133 jlong ldx = DblToLong(lslope); |
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134 jlong rdx = DblToLong(rslope); |
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135 jint cy1, cy2, loy, hiy; |
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136 dx1 += x0; |
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137 dy1 += y0; |
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138 dx2 += x0; |
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139 dy2 += y0; |
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140 cy1 = (jint) floor(dy1 + 0.5); |
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141 cy2 = (jint) floor(dy2 + 0.5); |
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142 |
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143 /* Top triangular portion. */ |
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144 loy = iy1; |
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145 hiy = (cy1 < cy2) ? cy1 : cy2; |
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146 if (hiy > iy2) hiy = iy2; |
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147 if (loy < hiy) { |
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148 jlong lx = PGRAM_INIT_X(loy, x0, y0, lslope); |
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149 jlong rx = PGRAM_INIT_X(loy, x0, y0, rslope); |
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150 (*pPrim->funcs.fillparallelogram)(&rasInfo, |
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151 ix1, loy, ix2, hiy, |
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152 lx, ldx, rx, rdx, |
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153 pixel, pPrim, &compInfo); |
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154 } |
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155 |
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156 /* Middle parallelogram portion, which way does it slant? */ |
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157 if (cy1 < cy2) { |
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158 /* Middle parallelogram portion, slanted to right. */ |
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159 /* left leg turned a corner at y0+dy1 */ |
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160 /* right leg continuing on its initial trajectory from y0 */ |
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161 loy = cy1; |
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162 hiy = cy2; |
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163 if (loy < iy1) loy = iy1; |
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164 if (hiy > iy2) hiy = iy2; |
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165 if (loy < hiy) { |
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166 jlong lx = PGRAM_INIT_X(loy, dx1, dy1, rslope); |
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167 jlong rx = PGRAM_INIT_X(loy, x0, y0, rslope); |
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168 (*pPrim->funcs.fillparallelogram)(&rasInfo, |
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169 ix1, loy, ix2, hiy, |
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170 lx, rdx, rx, rdx, |
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171 pixel, pPrim, &compInfo); |
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172 } |
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173 } else if (cy2 < cy1) { |
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174 /* Middle parallelogram portion, slanted to left. */ |
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175 /* left leg continuing on its initial trajectory from y0 */ |
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176 /* right leg turned a corner at y0+dy2 */ |
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177 loy = cy2; |
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178 hiy = cy1; |
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179 if (loy < iy1) loy = iy1; |
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180 if (hiy > iy2) hiy = iy2; |
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181 if (loy < hiy) { |
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182 jlong lx = PGRAM_INIT_X(loy, x0, y0, lslope); |
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183 jlong rx = PGRAM_INIT_X(loy, dx2, dy2, lslope); |
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184 (*pPrim->funcs.fillparallelogram)(&rasInfo, |
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185 ix1, loy, ix2, hiy, |
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186 lx, ldx, rx, ldx, |
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187 pixel, pPrim, &compInfo); |
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188 } |
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189 } |
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190 |
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191 /* Bottom triangular portion. */ |
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192 loy = (cy1 > cy2) ? cy1 : cy2; |
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193 if (loy < iy1) loy = iy1; |
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194 hiy = iy2; |
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195 if (loy < hiy) { |
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196 /* left leg turned its corner at y0+dy1, now moving right */ |
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197 /* right leg turned its corner at y0+dy2, now moving left */ |
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198 jlong lx = PGRAM_INIT_X(loy, dx1, dy1, rslope); |
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199 jlong rx = PGRAM_INIT_X(loy, dx2, dy2, lslope); |
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200 (*pPrim->funcs.fillparallelogram)(&rasInfo, |
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201 ix1, loy, ix2, hiy, |
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202 lx, rdx, rx, ldx, |
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203 pixel, pPrim, &compInfo); |
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204 } |
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205 } |
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206 SurfaceData_InvokeRelease(env, sdOps, &rasInfo); |
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207 } |
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208 SurfaceData_InvokeUnlock(env, sdOps, &rasInfo); |
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209 } |