Cross Reference: /external/chromium_org/third_party/mesa/src/src/mesa/swrast/s

Lines Matching refs:line
40  * Info about the AA line we're rendering
48    GLfloat halfWidth;     /* half of line width */
49    GLfloat xAdj, yAdj;    /* X and Y adjustment for quad corners around line */
77  * Compute the equation of a plane used to interpolate line fragment data
79  * Input: (x0, y0) and (x1,y1) are the endpoints of the line.
84  * We take the endpoints of the line and compute a plane such that
85  * the cross product of the line vector and the plane normal is
326 typedef void (*plot_func)(struct gl_context *ctx, struct LineInfo *line,
332  * Draw an AA line segment (called many times per line when stippling)
336         struct LineInfo *line,
340    const GLfloat absDx = (line->dx < 0.0F) ? -line->dx : line->dx;
341    const GLfloat absDy = (line->dy < 0.0F) ? -line->dy : line->dy;
343    const GLfloat x0 = line->x0 + t0 * line->dx;
344    const GLfloat y0 = line->y0 + t0 * line->dy;
345    const GLfloat x1 = line->x0 + t1 * line->dx;
346    const GLfloat y1 = line->y0 + t1 * line->dy;
348    /* compute vertices of the line-aligned quadrilateral */
349    line->qx0 = x0 - line->yAdj;
350    line->qy0 = y0 + line->xAdj;
351    line->qx1 = x0 + line->yAdj;
352    line->qy1 = y0 - line->xAdj;
353    line->qx2 = x1 + line->yAdj;
354    line->qy2 = y1 - line->xAdj;
355    line->qx3 = x1 - line->yAdj;
356    line->qy3 = y1 + line->xAdj;
358    line->ex0 = line->qx1 - line->qx0;
359    line->ey0 = line->qy1 - line->qy0;
360    line->ex1 = line->qx2 - line->qx1;
361    line->ey1 = line->qy2 - line->qy1;
362    line->ex2 = line->qx3 - line->qx2;
363    line->ey2 = line->qy3 - line->qy2;
364    line->ex3 = line->qx0 - line->qx3;
365    line->ey3 = line->qy0 - line->qy3;
368       /* X-major line */
369       GLfloat dydx = line->dy / line->dx;
373          xLeft = x0 - line->halfWidth;
374          xRight = x1 + line->halfWidth;
375          if (line->dy >= 0.0) {
376             yBot = y0 - 3.0F * line->halfWidth;
377             yTop = y0 + line->halfWidth;
380             yBot = y0 - line->halfWidth;
381             yTop = y0 + 3.0F * line->halfWidth;
385          xLeft = x1 - line->halfWidth;
386          xRight = x0 + line->halfWidth;
387          if (line->dy <= 0.0) {
388             yBot = y1 - 3.0F * line->halfWidth;
389             yTop = y1 + line->halfWidth;
392             yBot = y1 - line->halfWidth;
393             yTop = y1 + 3.0F * line->halfWidth;
397       /* scan along the line, left-to-right */
405          /* scan across the line, bottom-to-top */
407             (*plot)(ctx, line, ix, iy);
414       /* Y-major line */
415       GLfloat dxdy = line->dx / line->dy;
419          yBot = y0 - line->halfWidth;
420          yTop = y1 + line->halfWidth;
421          if (line->dx >= 0.0) {
422             xLeft = x0 - 3.0F * line->halfWidth;
423             xRight = x0 + line->halfWidth;
426             xLeft = x0 - line->halfWidth;
427             xRight = x0 + 3.0F * line->halfWidth;
431          yBot = y1 - line->halfWidth;
432          yTop = y0 + line->halfWidth;
433          if (line->dx <= 0.0) {
434             xLeft = x1 - 3.0F * line->halfWidth;
435             xRight = x1 + line->halfWidth;
438             xLeft = x1 - line->halfWidth;
439             xRight = x1 + 3.0F * line->halfWidth;
443       /* scan along the line, bottom-to-top */
451          /* scan across the line, left-to-right */
453             (*plot)(ctx, line, ix, iy);