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