113 lines
4.0 KiB
C++
113 lines
4.0 KiB
C++
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2020 Blender Foundation.
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* All rights reserved.
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*/
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/** \file
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* \ingroup edgpencil
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*/
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#pragma once
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/* internal exports only */
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struct FILE;
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struct ImBuf;
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struct Main;
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struct Object;
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struct bGPDframe;
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#include "potracelib.h"
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/* Potrace macros for writing individual bitmap pixels. */
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#define BM_WORDSIZE ((int)sizeof(potrace_word))
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#define BM_WORDBITS (8 * BM_WORDSIZE)
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#define BM_HIBIT (((potrace_word)1) << (BM_WORDBITS - 1))
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#define BM_ALLBITS (~(potrace_word)0)
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#define bm_scanline(bm, y) ((bm)->map + (y) * (bm)->dy)
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#define bm_index(bm, x, y) (&bm_scanline(bm, y)[(x) / BM_WORDBITS])
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#define bm_mask(x) (BM_HIBIT >> ((x) & (BM_WORDBITS - 1)))
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#define bm_range(x, a) ((int)(x) >= 0 && (int)(x) < (a))
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#define bm_safe(bm, x, y) (bm_range(x, (bm)->w) && bm_range(y, (bm)->h))
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#define BM_UGET(bm, x, y) ((*bm_index(bm, x, y) & bm_mask(x)) != 0)
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#define BM_USET(bm, x, y) (*bm_index(bm, x, y) |= bm_mask(x))
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#define BM_UCLR(bm, x, y) (*bm_index(bm, x, y) &= ~bm_mask(x))
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#define BM_UINV(bm, x, y) (*bm_index(bm, x, y) ^= bm_mask(x))
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#define BM_UPUT(bm, x, y, b) ((b) ? BM_USET(bm, x, y) : BM_UCLR(bm, x, y))
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#define BM_GET(bm, x, y) (bm_safe(bm, x, y) ? BM_UGET(bm, x, y) : 0)
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#define BM_SET(bm, x, y) (bm_safe(bm, x, y) ? BM_USET(bm, x, y) : 0)
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#define BM_CLR(bm, x, y) (bm_safe(bm, x, y) ? BM_UCLR(bm, x, y) : 0)
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#define BM_INV(bm, x, y) (bm_safe(bm, x, y) ? BM_UINV(bm, x, y) : 0)
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#define BM_PUT(bm, x, y, b) (bm_safe(bm, x, y) ? BM_UPUT(bm, x, y, b) : 0)
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/* Trace modes */
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#define GPENCIL_TRACE_MODE_SINGLE 0
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#define GPENCIL_TRACE_MODE_SEQUENCE 1
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/**
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* Print trace bitmap for debugging.
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* \param f: Output handle. Use `stderr` for printing
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* \param bm: Trace bitmap
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*/
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void ED_gpencil_trace_bitmap_print(FILE *f, const potrace_bitmap_t *bm);
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/**
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* Return new un-initialized trace bitmap
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* \param w: Width in pixels
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* \param h: Height in pixels
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* \return Trace bitmap
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*/
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potrace_bitmap_t *ED_gpencil_trace_bitmap_new(int32_t w, int32_t h);
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/**
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* Free a trace bitmap
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* \param bm: Trace bitmap
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*/
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void ED_gpencil_trace_bitmap_free(const potrace_bitmap_t *bm);
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/**
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* Invert the given bitmap (Black to White)
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* \param bm: Trace bitmap
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*/
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void ED_gpencil_trace_bitmap_invert(const potrace_bitmap_t *bm);
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/**
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* Convert image to BW bitmap for tracing
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* \param ibuf: ImBuf of the image
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* \param bm: Trace bitmap
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*/
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void ED_gpencil_trace_image_to_bitmap(struct ImBuf *ibuf,
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const potrace_bitmap_t *bm,
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const float threshold);
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/**
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* Convert Potrace Bitmap to Grease Pencil strokes
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* \param st: Data with traced data
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* \param ob: Target grease pencil object
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* \param offset: Offset to center
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* \param scale: Scale of the output
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* \param sample: Sample distance to distribute points
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*/
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void ED_gpencil_trace_data_to_strokes(struct Main *bmain,
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potrace_state_t *st,
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struct Object *ob,
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struct bGPDframe *gpf,
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int32_t offset[2],
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const float scale,
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const float sample,
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const int32_t resolution,
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const int32_t thickness);
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