mirror of
https://github.com/game-stop/veejay.git
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94 lines
2.4 KiB
C
94 lines
2.4 KiB
C
/*
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* Linux VeeJay
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*
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* Copyright(C)2002 Niels Elburg <nwelburg@gmail.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License , or (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307 , USA.
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*/
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#include "common.h"
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#include <veejaycore/vjmem.h>
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#include "feathermask.h"
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vj_effect *feathermask_init(int w,int h)
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{
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vj_effect *ve = (vj_effect *) vj_calloc(sizeof(vj_effect));
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ve->num_params = 0;
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ve->description = "Alpha: Feather Mask";
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ve->sub_format = -1;
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ve->extra_frame = 0;
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ve->has_user = 0;
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ve->parallel = 0;
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ve->alpha = FLAG_ALPHA_OUT | FLAG_ALPHA_SRC_A;
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return ve;
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}
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typedef struct {
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uint8_t *mask;
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} feathermask_t;
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void *feathermask_malloc(int width, int height)
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{
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feathermask_t *f = (feathermask_t*) vj_calloc(sizeof(feathermask_t));
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if(!f) {
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return NULL;
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}
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f->mask = (uint8_t*)vj_malloc(sizeof(uint8_t) * RUP8(width*height));
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if(!f->mask) {
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free(f);
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return NULL;
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}
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return (void*) f;
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}
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void feathermask_free(void *ptr)
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{
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feathermask_t *f = (feathermask_t*) ptr;
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free(f->mask);
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free(f);
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}
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static void feathermask1_apply( VJFrame *frame, uint8_t *alpha, unsigned int width, unsigned int height)
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{
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int r, c;
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const int len = frame->len - width;
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uint8_t *aA = frame->data[3];
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for(r=width; r < len; r+=width) {
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for(c=1; c < (width-1); c++) {
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if( alpha[r+c] != 0xff ) {
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aA[r+c] = (
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alpha[ r + c - width ] +
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alpha[ r + c + width ] +
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alpha[ r + c - 1 ] +
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alpha[ r + c + 1 ] +
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alpha[ r + c ]
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) / 5;
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}
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}
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}
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}
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void feathermask_apply(void *ptr, VJFrame *frame, int *args)
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{
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feathermask_t *f = (feathermask_t*) ptr;
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const unsigned int width = frame->width;
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const unsigned int height = frame->height;
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const int len = frame->len;
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vj_frame_copy1( frame->data[3],f->mask, len );
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feathermask1_apply(frame, f->mask, width, height);
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}
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