mirror of
https://github.com/mpv-player/mpv
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49 lines
1.8 KiB
C
49 lines
1.8 KiB
C
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/*
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* This file is part of mpv.
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*
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* mpv 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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* mpv 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
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* GNU 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MP_GL_ERROR_DIFFUSION
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#define MP_GL_ERROR_DIFFUSION
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#include "shader_cache.h"
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// defines the border of all error diffusion kernels
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#define EF_MIN_DELTA_X (-2)
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#define EF_MAX_DELTA_X (2)
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#define EF_MAX_DELTA_Y (2)
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struct error_diffusion_kernel {
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const char *name;
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// The minimum value such that a (y, x) -> (y, x + y * shift) mapping will
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// make all error pushing operations affect next column (and after it) only.
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int shift;
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// The diffusion factor for (y, x) is pattern[y][x - EF_MIN_DELTA_X] / divisor.
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int pattern[EF_MAX_DELTA_Y + 1][EF_MAX_DELTA_X - EF_MIN_DELTA_X + 1];
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int divisor;
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};
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extern const struct error_diffusion_kernel mp_error_diffusion_kernels[];
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const struct error_diffusion_kernel *mp_find_error_diffusion_kernel(const char *name);
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int mp_ef_compute_shared_memory_size(const struct error_diffusion_kernel *k, int height);
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void pass_error_diffusion(struct gl_shader_cache *sc,
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const struct error_diffusion_kernel *k,
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int tex, int width, int height, int depth, int block_size);
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#endif /* MP_GL_ERROR_DIFFUSION */
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