diff options
Diffstat (limited to 'gst/smpte/barboxwipes.c')
| -rw-r--r-- | gst/smpte/barboxwipes.c | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/gst/smpte/barboxwipes.c b/gst/smpte/barboxwipes.c new file mode 100644 index 00000000..031c282a --- /dev/null +++ b/gst/smpte/barboxwipes.c @@ -0,0 +1,152 @@ +/* GStreamer + * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ + +#include "paint.h" +#include "gstmask.h" + +static void +gst_bar_wipe_lr_update (GstMask *mask, + GstClockTime position, + GstClockTime duration) +{ + gint width = mask->width; + gint height = mask->height; + gint split = (position * width) / duration; + + gst_smpte_paint_rect (mask->data, width, split, 0, width - split, height, 0); + gst_smpte_paint_rect (mask->data, width, 0, 0, split, height, 255); +} + +static void +gst_bar_wipe_tb_update (GstMask *mask, + GstClockTime position, + GstClockTime duration) +{ + gint width = mask->width; + gint height = mask->height; + gint split = (position * height) / duration; + + gst_smpte_paint_rect (mask->data, width, 0, 0, width, split, 255); + gst_smpte_paint_rect (mask->data, width, 0, split, width, height - split, 0); +} + +static void +gst_box_wipe_update (GstMask *mask, + GstClockTime position, + GstClockTime duration) +{ + static gint box_wipe_impacts[8][4] = + { + /* 3 -> 6 */ + { 0, 0, 0, 0 }, + { 2, 2, 0, 0 }, + { 2, 2, 2, 2 }, + { 0, 0, 2, 2 }, + /* 23 -> 26 */ + { 1, 1, 0, 0 }, + { 2, 2, 1, 1 }, + { 1, 1, 2, 2 }, + { 0, 0, 1, 1 }, + }; + gint *impacts = box_wipe_impacts[(mask->type & 0x0F) - 3]; + gint width = mask->width; + gint height = mask->height; + gint splitx = (position * width) / duration; + gint splity = (position * height) / duration; + + gst_smpte_paint_rect (mask->data, width, 0, 0, width, height, 0); + gst_smpte_paint_rect (mask->data, width, + (impacts[0] * width)/2 - (impacts[1] * splitx)/2, + (impacts[2] * height)/2 - (impacts[3] * splity)/2, + splitx, splity, 255); +} + +static void +gst_fourc_box_wipe_update (GstMask *mask, + GstClockTime position, + GstClockTime duration) +{ + static gint box_wipe_impacts[8][4] = + { + { 0, 0, 0, 0 }, + { 1, 1, 1, 1 }, + { 4, 2, 0, 0 }, + { 3, 1, 1, 1 }, + { 4, 2, 4, 2 }, + { 1, 1, 3, 1 }, + { 0, 0, 4, 2 }, + { 3, 1, 3, 1 }, + }; + gint *impacts; + gint width = mask->width; + gint height = mask->height; + gint splitx = (position * width/2) / duration; + gint splity = (position * height/2) / duration; + gint i; + + gst_smpte_paint_rect (mask->data, width, 0, 0, width, height, 0); + + for (i = 7; i > 0; i -= 2) { + impacts = box_wipe_impacts[mask->type - i]; + gst_smpte_paint_rect (mask->data, width, + (impacts[0] * width)/4 - (impacts[1] * splitx)/2, + (impacts[2] * height)/4 - (impacts[3] * splity)/2, + splitx, splity, 255); + } +} + +static GstMaskDefinition definitions[] = { + { 1, "bar_wipe_lr", "A bar moves from left to right", + _gst_mask_default_new, _gst_mask_default_destroy, gst_bar_wipe_lr_update }, + { 2, "bar_wipe_tb", "A bar moves from top to bottom", + _gst_mask_default_new, _gst_mask_default_destroy, gst_bar_wipe_tb_update }, + { 3, "box_wipe_tl", "A box expands from the upper-left corner to the lower-right corner", + _gst_mask_default_new, _gst_mask_default_destroy, gst_box_wipe_update }, + { 4, "box_wipe_tr", "A box expands from the upper-right corner to the lower-left corner", + _gst_mask_default_new, _gst_mask_default_destroy, gst_box_wipe_update }, + { 5, "box_wipe_br", "A box expands from the lower-right corner to the upper-left corner", + _gst_mask_default_new, _gst_mask_default_destroy, gst_box_wipe_update }, + { 6, "box_wipe_bl", "A box expands from the lower-left corner to the upper-right corner", + _gst_mask_default_new, _gst_mask_default_destroy, gst_box_wipe_update }, + { 23, "box_wipe_tc", "A box expands from the top edge's midpoint to the bottom corners", + _gst_mask_default_new, _gst_mask_default_destroy, gst_box_wipe_update }, + { 24, "box_wipe_rc", "A box expands from the right edge's midpoint to the left corners", + _gst_mask_default_new, _gst_mask_default_destroy, gst_box_wipe_update }, + { 25, "box_wipe_bc", "A box expands from the bottom edge's midpoint to the top corners", + _gst_mask_default_new, _gst_mask_default_destroy, gst_box_wipe_update }, + { 26, "box_wipe_lc", "A box expands from the left edge's midpoint to the right corners", + _gst_mask_default_new, _gst_mask_default_destroy, gst_box_wipe_update }, + { 7 , "four_box_wipe_ci", "A box shape expands from each of the four corners toward the center", + _gst_mask_default_new, _gst_mask_default_destroy, gst_fourc_box_wipe_update }, + { 8 , "four_box_wipe_co", "A box shape expands from the center of each quadrant toward the corners of each quadrant", + _gst_mask_default_new, _gst_mask_default_destroy, gst_fourc_box_wipe_update }, + { 0, NULL, NULL, NULL } +}; + +void +_gst_barboxwipes_register (void) +{ + gint i = 0; + + while (definitions[i].short_name) { + _gst_mask_register (&definitions[i]); + i++; + } +} + |