mirror of
https://github.com/game-stop/veejay.git
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108 lines
3.3 KiB
C
108 lines
3.3 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 <libvje/effects/common.h>
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#include <veejaycore/vjmem.h>
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#include "transline.h"
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vj_effect *transline_init(int width, int height)
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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 = 2;
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ve->defaults = (int *) vj_calloc(sizeof(int) * ve->num_params); /* default values */
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ve->limits[0] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* min */
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ve->limits[1] = (int *) vj_calloc(sizeof(int) * ve->num_params); /* max */
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ve->defaults[0] = 1;
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ve->defaults[1] = 1;
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ve->limits[0][0] = 0;
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ve->limits[1][0] = (width > height ? width : height);
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ve->limits[0][1] = 0;
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ve->limits[1][1] = 1;
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ve->sub_format = 1;
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ve->description = "Transition Wipe Cross";
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ve->extra_frame = 1;
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ve->has_user = 0;
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ve->param_description = vje_build_param_list(ve->num_params, "Speed", "Bounce");
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return ve;
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}
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typedef struct {
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float wipePositionX;
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float wipePositionY;
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int directionX;
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int directionY;
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} wipe_t;
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void *transline_malloc(int w, int h)
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{
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wipe_t *wipe = (wipe_t*) vj_calloc(sizeof(wipe_t));
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wipe->directionX = 1;
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wipe->directionY = 1;
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return wipe;
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}
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void transline_free(void *ptr) {
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free(ptr);
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}
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void transline_apply( void *ptr, VJFrame *frame, VJFrame *frame2, int *args ) {
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wipe_t *wipe = (wipe_t *)ptr;
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int width = frame->width;
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int height = frame->height;
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int speed = args[0];
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int bounce = args[1];
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int centerX = width / 2;
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int centerY = height / 2;
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double scale = 1.0 * wipe->wipePositionX / width;
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const int crossWidth = width * scale;
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const int crossHeight = height * scale;
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wipe->wipePositionX += speed * wipe->directionX;
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// Check if the wipe reaches the edge or goes negative
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if (wipe->wipePositionX >= width || wipe->wipePositionX <= 0) {
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if (bounce) {
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wipe->directionX *= -1;
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}
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wipe->wipePositionX = (wipe->directionX > 0) ? 0 : centerX;
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}
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for (int i = 0; i < height; ++i) {
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for (int j = 0; j < width; ++j) {
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int index = i * width + j;
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// Check if the pixel is inside the cross shape
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if ((j >= centerX - crossWidth / 2 && j <= centerX + crossWidth / 2) ||
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(i >= centerY - crossHeight / 2 && i <= centerY + crossHeight / 2)) {
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// Copy the pixel from the second frame
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frame->data[0][index] = frame2->data[0][index];
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frame->data[1][index] = frame2->data[1][index];
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frame->data[2][index] = frame2->data[2][index];
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}
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}
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}
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}
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