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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
*/
const sampler_t linear_sampler = (CLK_NORMALIZED_COORDS_FALSE |
CLK_FILTER_LINEAR);
const sampler_t nearest_sampler = (CLK_NORMALIZED_COORDS_FALSE |
CLK_FILTER_NEAREST);
__kernel void remap_near(__write_only image2d_t dst,
__read_only image2d_t src,
__read_only image2d_t xmapi,
__read_only image2d_t ymapi,
float4 fill_color)
{
int2 p = (int2)(get_global_id(0), get_global_id(1));
int2 dimi = get_image_dim(src);
float2 dimf = (float2)(dimi.x, dimi.y);
float4 val;
int2 mi;
float m;
float4 xmap = read_imagef(xmapi, nearest_sampler, p);
float4 ymap = read_imagef(ymapi, nearest_sampler, p);
float2 pos = (float2)(xmap.x, ymap.x);
pos.xy = pos.xy * 65535.f;
mi = ((pos >= (float2)(0.f, 0.f)) * (pos < dimf) * (p <= dimi));
m = mi.x && mi.y;
val = mix(fill_color, read_imagef(src, nearest_sampler, pos), m);
write_imagef(dst, p, val);
}
__kernel void remap_linear(__write_only image2d_t dst,
__read_only image2d_t src,
__read_only image2d_t xmapi,
__read_only image2d_t ymapi,
float4 fill_color)
{
int2 p = (int2)(get_global_id(0), get_global_id(1));
int2 dimi = get_image_dim(src);
float2 dimf = (float2)(dimi.x, dimi.y);
float4 val;
int2 mi;
float m;
float4 xmap = read_imagef(xmapi, nearest_sampler, p);
float4 ymap = read_imagef(ymapi, nearest_sampler, p);
float2 pos = (float2)(xmap.x, ymap.x);
pos.xy = pos.xy * 65535.f;
mi = ((pos >= (float2)(0.f, 0.f)) * (pos < dimf) * (p <= dimi));
m = mi.x && mi.y;
val = mix(fill_color, read_imagef(src, linear_sampler, pos), m);
write_imagef(dst, p, val);
}
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