mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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676ecc296a
Original commit message from CVS: - implemented clock sweep on 90 degree angles to compensate for aspect ratio. - implemented remaining clock wipes
339 lines
8.4 KiB
C
339 lines
8.4 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include <math.h>
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#include "paint.h"
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void
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gst_smpte_paint_vbox (guint32 *dest, gint stride,
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gint x0, gint y0, gint c0,
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gint x1, gint y1, gint c1)
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{
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gint i, j;
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gint width, height;
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width = x1 - x0;
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height = y1 - y0;
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g_assert (width > 0);
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g_assert (height > 0);
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dest = dest + y0 * stride + x0;
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for (i = 0; i < height; i++) {
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for (j = 0; j < width; j++) {
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dest[j] = (c1 * j + c0 * (width - j)) / width;
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}
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dest += stride;
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}
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}
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void
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gst_smpte_paint_hbox (guint32 *dest, gint stride,
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gint x0, gint y0, gint c0,
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gint x1, gint y1, gint c1)
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{
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gint i, j;
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gint width, height;
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width = x1 - x0;
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height = y1 - y0;
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g_assert (width > 0);
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g_assert (height > 0);
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g_print ("vbox: %d %d %d %d %d %d\n", x0, y0, c0, x1, y1, c1);
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dest = dest + y0 * stride + x0;
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for (i = 0; i < height; i++) {
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guint32 value = (c1 * i + c0 * (height - i)) / height;
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for (j = 0; j < width; j++) {
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dest[j] = value;
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}
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dest += stride;
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}
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}
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#define STEP_3D_LINE(dxabs,dyabs,dzabs,sdx,sdy,sdz,xr,yr,zr,px,py,pz) \
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G_STMT_START { \
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if (dxabs >= dyabs && dxabs >= dzabs) { \
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yr += dyabs; \
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zr += dzabs; \
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if (yr >= dxabs) { \
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py += sdy; \
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yr -= dxabs; \
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} \
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if (zr >= dzabs) { \
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pz += sdz; \
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zr -= dxabs; \
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} \
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px += sdx; \
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} else if (dyabs >= dxabs && dyabs >= dzabs) { \
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xr += dxabs; \
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zr += dzabs; \
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if (xr >= dyabs) { \
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px += sdx; \
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xr -= dyabs; \
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} \
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if (zr >= dzabs) { \
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pz += sdz; \
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zr -= dyabs; \
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} \
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py += sdy; \
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} else { \
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yr += dyabs; \
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xr += dxabs; \
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if (yr >= dyabs) { \
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py += sdy; \
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yr -= dzabs; \
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} \
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if (xr >= dyabs) { \
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px += sdx; \
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xr -= dzabs; \
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} \
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pz += sdz; \
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} \
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} G_STMT_END
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#define SWAP(a,b) \
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G_STMT_START { \
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typeof (a) tmp; \
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tmp = (a); \
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(a) = (b); \
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(b) = (tmp); \
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} G_STMT_END
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#define SIGN(a) ((a) < 0 ? -1 : 1)
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#define PREPARE_3D_LINE(x0,y0,z0,x1,y1,z1,dxabs,dyabs,dzabs,sdx,sdy,sdz,xr,yr,zr,px,py,pz)\
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G_STMT_START { \
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typeof (x0) dx, dy, dz; \
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dx = x1 - x0; \
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dy = y1 - y0; \
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dz = z1 - z0; \
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dxabs = abs (dx); \
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dyabs = abs (dy); \
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dzabs = abs (dz); \
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sdx = SIGN (dx); \
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sdy = SIGN (dy); \
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sdz = SIGN (dz); \
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xr = dxabs >> 1; \
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yr = dyabs >> 1; \
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zr = dzabs >> 1; \
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px = x0; \
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py = y0; \
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pz = z0; \
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} G_STMT_END
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void
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gst_smpte_paint_triangle_linear (guint32 *dest, gint stride,
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gint x0, gint y0, gint c0,
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gint x1, gint y1, gint c1, gint x2, gint y2, gint c2)
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{
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gint sdxl, sdyl, sdcl, dxlabs, dylabs, dclabs, xrl, yrl, crl, pxl, pyl, pcl;
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gint sdxr, sdyr, sdcr, dxrabs, dyrabs, dcrabs, xrr, yrr, crr, pxr, pyr, pcr;
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gint i, j, k, seg_start, seg_end;
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if (y0 > y1) { SWAP (x0, x1); SWAP (y0, y1); SWAP (c0, c1); }
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if (y0 > y2) { SWAP (x0, x2); SWAP (y0, y2); SWAP (c0, c2); }
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if (y1 > y2) { SWAP (x1, x2); SWAP (y1, y2); SWAP (c1, c2); }
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PREPARE_3D_LINE (x0,y0,c0,x2,y2,c2,
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dxlabs,dylabs,dclabs,
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sdxl, sdyl,sdcl,
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xrl,yrl,crl,
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pxl,pyl,pcl);
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PREPARE_3D_LINE (x0,y0,c0,x1,y1,c1,
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dxrabs,dyrabs,dcrabs,
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sdxr, sdyr,sdcr,
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xrr,yrr,crr,
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pxr,pyr,pcr);
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dest = dest + stride * y0;
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seg_start = y0;
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seg_end = y1;
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/* do two passes */
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for (k = 0; k < 2; k++) {
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for (i = seg_start; i < seg_end; i++) {
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gint s = pxl, e = pxr, sc = pcl, ec = pcr;
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gint sign = SIGN (e - s);
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e += sign;
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for (j = s; j != e; j+=sign) {
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dest[j] = (ec * (j - s) + sc * (e - j)) / (e - s);
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}
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while (pyr == i) {
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STEP_3D_LINE (dxrabs, dyrabs, dcrabs, sdxr, sdyr, sdcr,
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xrr, yrr, crr, pxr, pyr, pcr);
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}
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while (pyl == i) {
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STEP_3D_LINE (dxlabs, dylabs, dclabs, sdxl, sdyl, sdcl,
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xrl, yrl, crl, pxl, pyl, pcl);
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}
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dest += stride;
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}
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PREPARE_3D_LINE (x1,y1,c1,x2,y2,c2,
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dxrabs,dyrabs,dcrabs,
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sdxr, sdyr,sdcr,
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xrr,yrr,crr,
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pxr,pyr,pcr);
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seg_start = y1;
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seg_end = y2;
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}
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}
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void
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draw_line (guint32* dest, gint stride, int x, int y, int x2, int y2, int col)
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{
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gboolean yLonger=FALSE;
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int incrementVal, endVal;
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gdouble decInc;
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int shortLen=y2-y;
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int longLen=x2-x;
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gdouble j=0.0;
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int i;
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if (abs(shortLen)>abs(longLen)) {
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int swap=shortLen;
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shortLen=longLen;
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longLen=swap;
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yLonger=TRUE;
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}
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endVal=longLen;
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if (longLen<0) {
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incrementVal=-1;
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longLen=-longLen;
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}
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else incrementVal=1;
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if (longLen==0) decInc=(gdouble)shortLen;
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else decInc = ((gdouble)shortLen/(gdouble)longLen);
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if (yLonger) {
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for (i=0;i!=endVal;i+=incrementVal) {
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*(dest+(x+(int)j) + (y+i)*stride) = col;
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j+=decInc;
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}
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} else {
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for (i=0;i!=endVal;i+=incrementVal) {
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*(dest+(x+i) + (y+(int)j)*stride) = col;
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j+=decInc;
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}
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}
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}
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void
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gst_smpte_paint_triangle_clock (guint32 *dest, gint stride,
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gint x0, gint y0, gint c0,
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gint x1, gint y1, gint c1,
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gint x2, gint y2, gint c2)
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{
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gint i;
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gint sign;
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gfloat angle, angle_s, angle_e;
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angle_s = 0.0;
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angle_e = acos (((x1-x0) * (x2-x0) + (y1-y0) * (y2-y0))/
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(sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) *
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sqrt ((x2-x0) * (x2-x0) + (y2-y0) * (y2-y0))));
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if (x1 == x2) {
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gfloat len1 = sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0));
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sign = SIGN (y2 - y1);
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for (i=y1; i != y2+sign; i+=sign) {
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gfloat len2 = sqrt ((x1-x0) * (x1-x0) + (i-y0) * (i-y0));
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if (y1==i)
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angle = 0;
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else
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angle = acos (((x1-x0) * (x2-x0) + (y1-y0) * (i-y0))/ (len1 * len2)) / angle_e;
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draw_line (dest, stride,
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x0, y0, x1, i,
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(c2 * angle + c1 * (1.0-angle)));
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}
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}
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else if (y1 == y2) {
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gfloat len1 = sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0));
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sign = SIGN (x2 - x1);
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for (i=x1; i != x2+sign; i+=sign) {
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gfloat len2 = sqrt ((i-x0) * (i-x0) + (y2-y0) * (y2-y0));
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if (x1==i)
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angle = 0;
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else
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angle = acos (((x1-x0) * (i-x0) + (y1-y0) * (y2-y0)) / (len1 * len2)) / angle_e;
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draw_line (dest, stride,
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x0, y0, i, y1,
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(c2 * angle + c1 * (1.0-angle)));
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}
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}
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}
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void
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gst_smpte_paint_box_clock (guint32 *dest, gint stride,
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gint x0, gint y0, gint c0,
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gint x1, gint y1, gint c1,
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gint x2, gint y2, gint c2)
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{
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gfloat angle_m;
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if (x1 == x0) {
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angle_m = 2* acos (((x1-x0) * (x2-x0) + (y1-y0) * (y1-y0))/
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(sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) *
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sqrt ((x2-x0) * (x2-x0) + (y1-y0) * (y1-y0)))) / M_PI;
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gst_smpte_paint_triangle_clock (dest, stride,
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x0, y0, c0,
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x1, y1, c1,
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x2, y1, (c2 * angle_m + c1 * (1.0-angle_m)));
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gst_smpte_paint_triangle_clock (dest, stride,
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x0, y0, c0,
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x2, y1, (c2 * angle_m + c1 * (1.0-angle_m)),
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x2, y2, c2);
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}
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else if (y1 == y0) {
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angle_m = 2* acos (((x1-x0) * (x1-x0) + (y1-y0) * (y2-y0))/
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(sqrt ((x1-x0) * (x1-x0) + (y1-y0) * (y1-y0)) *
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sqrt ((x1-x0) * (x1-x0) + (y2-y0) * (y2-y0)))) / M_PI;
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gst_smpte_paint_triangle_clock (dest, stride,
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x0, y0, c0,
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x1, y1, c1,
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x1, y2, (c2 * angle_m + c1 * (1.0-angle_m)));
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gst_smpte_paint_triangle_clock (dest, stride,
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x0, y0, c0,
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x1, y2, (c2 * angle_m + c1 * (1.0-angle_m)),
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x2, y2, c2);
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}
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}
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