44    GLfloat x0, y0;        /* start */
45    GLfloat x1, y1;        /* end */
46    GLfloat dx, dy;        /* direction vector */
47    GLfloat len;           /* length */
48    GLfloat halfWidth;     /* half of line width */
49    GLfloat xAdj, yAdj;    /* X and Y adjustment for quad corners around line */
51    GLfloat qx0, qy0;      /* quad vertices */
52    GLfloat qx1, qy1;
53    GLfloat qx2, qy2;
54    GLfloat qx3, qy3;
55    GLfloat ex0, ey0;      /* quad edge vectors */
56    GLfloat ex1, ey1;
57    GLfloat ex2, ey2;
58    GLfloat ex3, ey3;
61    GLfloat zPlane[4];
63    GLfloat rPlane[4], gPlane[4], bPlane[4], aPlane[4];
65    GLfloat wPlane[4];
66    GLfloat attrPlane[FRAG_ATTRIB_MAX][4][4];
67    GLfloat lambda[FRAG_ATTRIB_MAX];
68    GLfloat texWidth[FRAG_ATTRIB_MAX];
69    GLfloat texHeight[FRAG_ATTRIB_MAX];
89 compute_plane(GLfloat x0, GLfloat y0, GLfloat x1, GLfloat y1,  in compute_plane()
90               GLfloat z0, GLfloat z1, GLfloat plane[4])  in compute_plane()
94    const GLfloat px = x1 - x0;  in compute_plane()
95    const GLfloat py = y1 - y0;  in compute_plane()
96    const GLfloat pz = z1 - z0;  in compute_plane()
97    const GLfloat qx = -py;  in compute_plane()
98    const GLfloat qy = px;  in compute_plane()
99    const GLfloat qz = 0;  in compute_plane()
100    const GLfloat a = py * qz - pz * qy;  in compute_plane()
101    const GLfloat b = pz * qx - px * qz;  in compute_plane()
102    const GLfloat c = px * qy - py * qx;  in compute_plane()
103    const GLfloat d = -(a * x0 + b * y0 + c * z0);  in compute_plane()
110    const GLfloat px = x1 - x0;  in compute_plane()
111    const GLfloat py = y1 - y0;  in compute_plane()
112    const GLfloat pz = z0 - z1;  in compute_plane()
113    const GLfloat a = pz * px;  in compute_plane()
114    const GLfloat b = pz * py;  in compute_plane()
115    const GLfloat c = px * px + py * py;  in compute_plane()
116    const GLfloat d = -(a * x0 + b * y0 + c * z0);  in compute_plane()
134 constant_plane(GLfloat value, GLfloat plane[4])  in constant_plane()
143 static inline GLfloat
144 solve_plane(GLfloat x, GLfloat y, const GLfloat plane[4])  in solve_plane()
146    const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];  in solve_plane()
157 static inline GLfloat
158 solve_plane_recip(GLfloat x, GLfloat y, const GLfloat plane[4])  in solve_plane_recip()
160    const GLfloat denom = plane[3] + plane[0] * x + plane[1] * y;  in solve_plane_recip()
172 solve_plane_chan(GLfloat x, GLfloat y, const GLfloat plane[4])  in solve_plane_chan()
174    const GLfloat z = (plane[3] + plane[0] * x + plane[1] * y) / -plane[2];  in solve_plane_chan()
190 static inline GLfloat
191 compute_lambda(const GLfloat sPlane[4], const GLfloat tPlane[4],  in compute_lambda()
192                GLfloat invQ, GLfloat width, GLfloat height)  in compute_lambda()
194    GLfloat dudx = sPlane[0] / sPlane[2] * invQ * width;  in compute_lambda()
195    GLfloat dudy = sPlane[1] / sPlane[2] * invQ * width;  in compute_lambda()
196    GLfloat dvdx = tPlane[0] / tPlane[2] * invQ * height;  in compute_lambda()
197    GLfloat dvdy = tPlane[1] / tPlane[2] * invQ * height;  in compute_lambda()
198    GLfloat r1 = dudx * dudx + dudy * dudy;  in compute_lambda()
199    GLfloat r2 = dvdx * dvdx + dvdy * dvdy;  in compute_lambda()
200    GLfloat rho2 = r1 + r2;  in compute_lambda()
205       return (GLfloat) (LOGF(rho2) * 1.442695 * 0.5);/* 1.442695 = 1/log(2) */  in compute_lambda()
219 make_sample_table(GLint xSamples, GLint ySamples, GLfloat samples[][2])  in make_sample_table()
221    const GLfloat dx = 1.0F / (GLfloat) xSamples;  in make_sample_table()
222    const GLfloat dy = 1.0F / (GLfloat) ySamples;  in make_sample_table()
263 static GLfloat
267    static GLfloat samples[SUB_PIXEL * SUB_PIXEL][2];  in compute_coveragef()
269    const GLfloat x = (GLfloat) winx;  in compute_coveragef()
270    const GLfloat y = (GLfloat) winy;  in compute_coveragef()
272    GLfloat insideCount = SUB_PIXEL * SUB_PIXEL;  in compute_coveragef()
281       const GLfloat area = dx0 * dy1 - dx1 * dy0;  in compute_coveragef()
287       const GLfloat sx = x + samples[i][0];  in compute_coveragef()
288       const GLfloat sy = y + samples[i][1];  in compute_coveragef()
289       const GLfloat fx0 = sx - info->qx0;  in compute_coveragef()
290       const GLfloat fy0 = sy - info->qy0;  in compute_coveragef()
291       const GLfloat fx1 = sx - info->qx1;  in compute_coveragef()
292       const GLfloat fy1 = sy - info->qy1;  in compute_coveragef()
293       const GLfloat fx2 = sx - info->qx2;  in compute_coveragef()
294       const GLfloat fy2 = sy - info->qy2;  in compute_coveragef()
295       const GLfloat fx3 = sx - info->qx3;  in compute_coveragef()
296       const GLfloat fy3 = sy - info->qy3;  in compute_coveragef()
298       GLfloat cross0 = (info->ex0 * fy0 - info->ey0 * fx0);  in compute_coveragef()
299       GLfloat cross1 = (info->ex1 * fy1 - info->ey1 * fx1);  in compute_coveragef()
300       GLfloat cross2 = (info->ex2 * fy2 - info->ey2 * fx2);  in compute_coveragef()
301       GLfloat cross3 = (info->ex3 * fy3 - info->ey3 * fx3);  in compute_coveragef()
338         GLfloat t0, GLfloat t1)  in segment()
340    const GLfloat absDx = (line->dx < 0.0F) ? -line->dx : line->dx;  in segment()
341    const GLfloat absDy = (line->dy < 0.0F) ? -line->dy : line->dy;  in segment()
343    const GLfloat x0 = line->x0 + t0 * line->dx;  in segment()
344    const GLfloat y0 = line->y0 + t0 * line->dy;  in segment()
345    const GLfloat x1 = line->x0 + t1 * line->dx;  in segment()
346    const GLfloat y1 = line->y0 + t1 * line->dy;  in segment()
369       GLfloat dydx = line->dy / line->dx;  in segment()
370       GLfloat xLeft, xRight, yBot, yTop;  in segment()
415       GLfloat dxdy = line->dx / line->dy;  in segment()
416       GLfloat yBot, yTop, xLeft, xRight;  in segment()