+++ /dev/null
-/*
- * /brief Draw arrows
- * /author Zachary Drew, Copyright 2004
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include <framework/mlt_frame.h>
-#include "arrow_code.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <string.h>
-
-#define MIN(a,b) ((a) > (b) ? (b) : (a))
-
-#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
-#define ABS(a) ((a) >= 0 ? (a) : (-(a)))
-
-
-static int w;
-static int h;
-static int xstride;
-static int ystride;
-static mlt_image_format format;
-
-int init_arrows( mlt_image_format *image_format, int width, int height )
-{
- w = width;
- h = height;
- format = *image_format;
- switch( *image_format ) {
- case mlt_image_yuv422:
- xstride = 2;
- ystride = xstride * w;
- break;
- default:
- // I don't know
- return 0;
- }
- return 1;
-
-}
-
-// ffmpeg borrowed
-static inline int clip(int a, int amin, int amax)
-{
- if (a < amin)
- return amin;
- else if (a > amax)
- return amax;
- else
- return a;
-}
-
-
-/**
- * draws an line from (ex, ey) -> (sx, sy).
- * Credits: modified from ffmpeg project
- * @param ystride stride/linesize of the image
- * @param xstride stride/element size of the image
- * @param color color of the arrow
- */
-void draw_line(uint8_t *buf, int sx, int sy, int ex, int ey, int color)
-{
- int t, x, y, fr, f;
-
-
- sx= clip(sx, 0, w-1);
- sy= clip(sy, 0, h-1);
- ex= clip(ex, 0, w-1);
- ey= clip(ey, 0, h-1);
-
- buf[sy*ystride + sx*xstride]+= color;
-
- if(ABS(ex - sx) > ABS(ey - sy)){
- if(sx > ex){
- t=sx; sx=ex; ex=t;
- t=sy; sy=ey; ey=t;
- }
- buf+= sx*xstride + sy*ystride;
- ex-= sx;
- f= ((ey-sy)<<16)/ex;
- for(x= 0; x <= ex; x++){
- y = (x*f)>>16;
- fr= (x*f)&0xFFFF;
- buf[ y *ystride + x*xstride]+= (color*(0x10000-fr))>>16;
- buf[(y+1)*ystride + x*xstride]+= (color* fr )>>16;
- }
- }else{
- if(sy > ey){
- t=sx; sx=ex; ex=t;
- t=sy; sy=ey; ey=t;
- }
- buf+= sx*xstride + sy*ystride;
- ey-= sy;
- if(ey) f= ((ex-sx)<<16)/ey;
- else f= 0;
- for(y= 0; y <= ey; y++){
- x = (y*f)>>16;
- fr= (y*f)&0xFFFF;
- buf[y*ystride + x *xstride]+= (color*(0x10000-fr))>>16;;
- buf[y*ystride + (x+1)*xstride]+= (color* fr )>>16;;
- }
- }
-}
-
-void draw_rectangle_fill(uint8_t *buf, int x, int y, int w, int h, int color)
-{
- int i,j;
- for ( i = 0; i < w; i++ )
- for ( j = 0; j < h; j++ )
- buf[ (y+j)*ystride + (x+i)*xstride] = color;
-}
-
-void draw_rectangle_outline(uint8_t *buf, int x, int y, int w, int h, int color)
-{
- int i,j;
- for ( i = 0; i < w; i++ ) {
- buf[ y*ystride + (x+i)*xstride ] += color;
- buf[ (y+h)*ystride + (x+i)*xstride ] += color;
- }
- for ( j = 1; j < h+1; j++ ) {
- buf[ (y+j)*ystride + x*xstride ] += color;
- buf[ (y+j)*ystride + (x+w)*xstride ] += color;
- }
-}
-/**
- * draws an arrow from (ex, ey) -> (sx, sy).
- * Credits: modified from ffmpeg project
- * @param stride stride/linesize of the image
- * @param color color of the arrow
- */
-void draw_arrow(uint8_t *buf, int sx, int sy, int ex, int ey, int color){
-
- int dx,dy;
- dx= ex - sx;
- dy= ey - sy;
-
- if(dx*dx + dy*dy > 3*3){
- int rx= dx + dy;
- int ry= -dx + dy;
- int length= sqrt((rx*rx + ry*ry)<<8);
-
- rx= ROUNDED_DIV(rx*3<<4, length);
- ry= ROUNDED_DIV(ry*3<<4, length);
-
- draw_line(buf, sx, sy, sx + rx, sy + ry, color);
- draw_line(buf, sx, sy, sx - ry, sy + rx, color);
- }
- draw_line(buf, sx, sy, ex, ey, color);
-}
projects / melted / blobdiff