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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
__kernel void overlay_no_alpha(__write_only image2d_t dst,
__read_only image2d_t main,
__read_only image2d_t overlay,
int x_position,
int y_position)
{
const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
CLK_FILTER_NEAREST);
int2 overlay_size = get_image_dim(overlay);
int2 loc = (int2)(get_global_id(0), get_global_id(1));
if (loc.x < x_position ||
loc.y < y_position ||
loc.x >= overlay_size.x + x_position ||
loc.y >= overlay_size.y + y_position) {
float4 val = read_imagef(main, sampler, loc);
write_imagef(dst, loc, val);
} else {
int2 loc_overlay = (int2)(x_position, y_position);
float4 val = read_imagef(overlay, sampler, loc - loc_overlay);
write_imagef(dst, loc, val);
}
}
__kernel void overlay_internal_alpha(__write_only image2d_t dst,
__read_only image2d_t main,
__read_only image2d_t overlay,
int x_position,
int y_position)
{
const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
CLK_FILTER_NEAREST);
int2 overlay_size = get_image_dim(overlay);
int2 loc = (int2)(get_global_id(0), get_global_id(1));
if (loc.x < x_position ||
loc.y < y_position ||
loc.x >= overlay_size.x + x_position ||
loc.y >= overlay_size.y + y_position) {
float4 val = read_imagef(main, sampler, loc);
write_imagef(dst, loc, val);
} else {
int2 loc_overlay = (int2)(x_position, y_position);
float4 in_main = read_imagef(main, sampler, loc);
float4 in_overlay = read_imagef(overlay, sampler, loc - loc_overlay);
float4 val = in_overlay * in_overlay.w + in_main * (1.0f - in_overlay.w);
write_imagef(dst, loc, val);
}
}
__kernel void overlay_external_alpha(__write_only image2d_t dst,
__read_only image2d_t main,
__read_only image2d_t overlay,
__read_only image2d_t alpha,
int x_position,
int y_position,
int alpha_adj_x,
int alpha_adj_y)
{
const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
CLK_FILTER_NEAREST);
int2 overlay_size = get_image_dim(overlay);
int2 loc = (int2)(get_global_id(0), get_global_id(1));
if (loc.x < x_position ||
loc.y < y_position ||
loc.x >= overlay_size.x + x_position ||
loc.y >= overlay_size.y + y_position) {
float4 val = read_imagef(main, sampler, loc);
write_imagef(dst, loc, val);
} else {
int2 loc_overlay = (int2)(x_position, y_position);
float4 in_main = read_imagef(main, sampler, loc);
float4 in_overlay = read_imagef(overlay, sampler, loc - loc_overlay);
int2 loc_alpha = (int2)(loc.x * alpha_adj_x,
loc.y * alpha_adj_y) - loc_overlay;
float4 in_alpha = read_imagef(alpha, sampler, loc_alpha);
float4 val = in_overlay * in_alpha.x + in_main * (1.0f - in_alpha.x);
write_imagef(dst, loc, val);
}
}
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