Cross Reference: /xsrc/external/mit/MesaLib.old/dist/src/mesa/swrast/s

Lines Matching refs:line
42  * Info about the AA line we're rendering
50    GLfloat halfWidth;     /* half of line width */
51    GLfloat xAdj, yAdj;    /* X and Y adjustment for quad corners around line */
79  * Compute the equation of a plane used to interpolate line fragment data
81  * Input: (x0, y0) and (x1,y1) are the endpoints of the line.
86  * We take the endpoints of the line and compute a plane such that
87  * the cross product of the line vector and the plane normal is
328 typedef void (*plot_func)(struct gl_context *ctx, struct LineInfo *line,
334  * Draw an AA line segment (called many times per line when stippling)
338         struct LineInfo *line,
342    const GLfloat absDx = (line->dx < 0.0F) ? -line->dx : line->dx;
343    const GLfloat absDy = (line->dy < 0.0F) ? -line->dy : line->dy;
345    const GLfloat x0 = line->x0 + t0 * line->dx;
346    const GLfloat y0 = line->y0 + t0 * line->dy;
347    const GLfloat x1 = line->x0 + t1 * line->dx;
348    const GLfloat y1 = line->y0 + t1 * line->dy;
350    /* compute vertices of the line-aligned quadrilateral */
351    line->qx0 = x0 - line->yAdj;
352    line->qy0 = y0 + line->xAdj;
353    line->qx1 = x0 + line->yAdj;
354    line->qy1 = y0 - line->xAdj;
355    line->qx2 = x1 + line->yAdj;
356    line->qy2 = y1 - line->xAdj;
357    line->qx3 = x1 - line->yAdj;
358    line->qy3 = y1 + line->xAdj;
360    line->ex0 = line->qx1 - line->qx0;
361    line->ey0 = line->qy1 - line->qy0;
362    line->ex1 = line->qx2 - line->qx1;
363    line->ey1 = line->qy2 - line->qy1;
364    line->ex2 = line->qx3 - line->qx2;
365    line->ey2 = line->qy3 - line->qy2;
366    line->ex3 = line->qx0 - line->qx3;
367    line->ey3 = line->qy0 - line->qy3;
370       /* X-major line */
371       GLfloat dydx = line->dy / line->dx;
375          xLeft = x0 - line->halfWidth;
376          xRight = x1 + line->halfWidth;
377          if (line->dy >= 0.0F) {
378             yBot = y0 - 3.0F * line->halfWidth;
379             yTop = y0 + line->halfWidth;
382             yBot = y0 - line->halfWidth;
383             yTop = y0 + 3.0F * line->halfWidth;
387          xLeft = x1 - line->halfWidth;
388          xRight = x0 + line->halfWidth;
389          if (line->dy <= 0.0F) {
390             yBot = y1 - 3.0F * line->halfWidth;
391             yTop = y1 + line->halfWidth;
394             yBot = y1 - line->halfWidth;
395             yTop = y1 + 3.0F * line->halfWidth;
399       /* scan along the line, left-to-right */
407          /* scan across the line, bottom-to-top */
409             (*plot)(ctx, line, ix, iy);
416       /* Y-major line */
417       GLfloat dxdy = line->dx / line->dy;
421          yBot = y0 - line->halfWidth;
422          yTop = y1 + line->halfWidth;
423          if (line->dx >= 0.0F) {
424             xLeft = x0 - 3.0F * line->halfWidth;
425             xRight = x0 + line->halfWidth;
428             xLeft = x0 - line->halfWidth;
429             xRight = x0 + 3.0F * line->halfWidth;
433          yBot = y1 - line->halfWidth;
434          yTop = y0 + line->halfWidth;
435          if (line->dx <= 0.0F) {
436             xLeft = x1 - 3.0F * line->halfWidth;
437             xRight = x1 + line->halfWidth;
440             xLeft = x1 - line->halfWidth;
441             xRight = x1 + 3.0F * line->halfWidth;
445       /* scan along the line, bottom-to-top */
453          /* scan across the line, left-to-right */
455             (*plot)(ctx, line, ix, iy);