diff options
Diffstat (limited to 'libavfilter/opencl/overlay.cl')
| -rw-r--r-- | libavfilter/opencl/overlay.cl | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/libavfilter/opencl/overlay.cl b/libavfilter/opencl/overlay.cl new file mode 100644 index 0000000000..8c783d0edc --- /dev/null +++ b/libavfilter/opencl/overlay.cl @@ -0,0 +1,104 @@ +/* + * 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); + } +} |