926 lines
31 KiB
C
926 lines
31 KiB
C
/*
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* Copyright (C) 2009 Grigori Goronzy <greg@geekmind.org>
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*
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* This file is part of libass.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#include "ass_render.h"
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#include "ass_parse.h"
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#define MAX_BE 127
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#define NBSP 0xa0 // unicode non-breaking space character
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#define skip_to(x) while ((*p != (x)) && (*p != '}') && (*p != 0)) { ++p;}
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#define skip(x) if (*p == (x)) ++p; else { return p; }
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#define skipopt(x) if (*p == (x)) { ++p; }
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/**
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* \brief Check if starting part of (*p) matches sample.
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* If true, shift p to the first symbol after the matching part.
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*/
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static inline int mystrcmp(char **p, const char *sample)
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{
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int len = strlen(sample);
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if (strncmp(*p, sample, len) == 0) {
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(*p) += len;
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return 1;
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} else
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return 0;
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}
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static void change_font_size(ASS_Renderer *render_priv, double sz)
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{
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double size = sz * render_priv->font_scale;
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if (size < 1)
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size = 1;
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else if (size > render_priv->height * 2)
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size = render_priv->height * 2;
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ass_font_set_size(render_priv->state.font, size);
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render_priv->state.font_size = sz;
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}
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/**
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* \brief Change current font, using setting from render_priv->state.
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*/
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void update_font(ASS_Renderer *render_priv)
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{
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unsigned val;
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ASS_FontDesc desc;
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desc.family = strdup(render_priv->state.family);
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desc.treat_family_as_pattern =
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render_priv->state.treat_family_as_pattern;
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val = render_priv->state.bold;
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// 0 = normal, 1 = bold, >1 = exact weight
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if (val == 1 || val == -1)
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val = 200; // bold
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else if (val <= 0)
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val = 80; // normal
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desc.bold = val;
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val = render_priv->state.italic;
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if (val == 1 || val == -1)
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val = 110; // italic
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else if (val <= 0)
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val = 0; // normal
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desc.italic = val;
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render_priv->state.font =
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ass_font_new(render_priv->cache.font_cache, render_priv->library,
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render_priv->ftlibrary, render_priv->fontconfig_priv,
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&desc);
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free(desc.family);
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if (render_priv->state.font)
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change_font_size(render_priv, render_priv->state.font_size);
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}
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/**
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* \brief Change border width
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* negative value resets border to style value
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*/
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void change_border(ASS_Renderer *render_priv, double border_x,
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double border_y)
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{
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int bord;
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if (!render_priv->state.font)
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return;
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if (border_x < 0 && border_y < 0) {
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if (render_priv->state.style->BorderStyle == 1 ||
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render_priv->state.style->BorderStyle == 3)
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border_x = border_y = render_priv->state.style->Outline;
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else
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border_x = border_y = 1.;
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}
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render_priv->state.border_x = border_x;
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render_priv->state.border_y = border_y;
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bord = 64 * border_x * render_priv->border_scale;
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if (bord > 0 && border_x == border_y) {
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if (!render_priv->state.stroker) {
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int error;
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error =
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FT_Stroker_New(render_priv->ftlibrary,
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&render_priv->state.stroker);
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if (error) {
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ass_msg(render_priv->library, MSGL_V,
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"failed to get stroker");
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render_priv->state.stroker = 0;
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}
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}
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if (render_priv->state.stroker)
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FT_Stroker_Set(render_priv->state.stroker, bord,
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FT_STROKER_LINECAP_ROUND,
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FT_STROKER_LINEJOIN_ROUND, 0);
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} else {
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FT_Stroker_Done(render_priv->state.stroker);
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render_priv->state.stroker = 0;
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}
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}
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/**
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* \brief Calculate a weighted average of two colors
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* calculates c1*(1-a) + c2*a, but separately for each component except alpha
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*/
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static void change_color(uint32_t *var, uint32_t new, double pwr)
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{
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(*var) = ((uint32_t) (_r(*var) * (1 - pwr) + _r(new) * pwr) << 24) +
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((uint32_t) (_g(*var) * (1 - pwr) + _g(new) * pwr) << 16) +
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((uint32_t) (_b(*var) * (1 - pwr) + _b(new) * pwr) << 8) + _a(*var);
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}
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// like change_color, but for alpha component only
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inline void change_alpha(uint32_t *var, uint32_t new, double pwr)
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{
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*var =
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(_r(*var) << 24) + (_g(*var) << 16) + (_b(*var) << 8) +
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(uint32_t) (_a(*var) * (1 - pwr) + _a(new) * pwr);
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}
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/**
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* \brief Multiply two alpha values
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* \param a first value
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* \param b second value
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* \return result of multiplication
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* Parameters and result are limited by 0xFF.
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*/
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inline uint32_t mult_alpha(uint32_t a, uint32_t b)
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{
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return 0xFF - (0xFF - a) * (0xFF - b) / 0xFF;
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}
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/**
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* \brief Calculate alpha value by piecewise linear function
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* Used for \fad, \fade implementation.
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*/
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static unsigned
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interpolate_alpha(long long now, long long t1, long long t2, long long t3,
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long long t4, unsigned a1, unsigned a2, unsigned a3)
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{
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unsigned a;
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double cf;
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if (now <= t1) {
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a = a1;
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} else if (now >= t4) {
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a = a3;
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} else if (now < t2) { // and > t1
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cf = ((double) (now - t1)) / (t2 - t1);
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a = a1 * (1 - cf) + a2 * cf;
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} else if (now > t3) {
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cf = ((double) (now - t3)) / (t4 - t3);
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a = a2 * (1 - cf) + a3 * cf;
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} else { // t2 <= now <= t3
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a = a2;
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}
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return a;
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}
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/**
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* Parse a vector clip into an outline, using the proper scaling
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* parameters. Translate it to correct for screen borders, if needed.
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*/
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static char *parse_vector_clip(ASS_Renderer *render_priv, char *p)
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{
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int scale = 1;
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int res = 0;
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ASS_Drawing *drawing;
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render_priv->state.clip_drawing = ass_drawing_new(
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render_priv->fontconfig_priv,
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render_priv->state.font,
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render_priv->settings.hinting,
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render_priv->ftlibrary);
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drawing = render_priv->state.clip_drawing;
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skipopt('(');
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res = mystrtoi(&p, &scale);
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skipopt(',')
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if (!res)
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scale = 1;
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drawing->scale = scale;
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drawing->scale_x = render_priv->font_scale_x * render_priv->font_scale;
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drawing->scale_y = render_priv->font_scale;
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while (*p != ')' && *p != '}' && p != 0)
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ass_drawing_add_char(drawing, *p++);
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skipopt(')');
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if (ass_drawing_parse(drawing, 1)) {
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// We need to translate the clip according to screen borders
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if (render_priv->settings.left_margin != 0 ||
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render_priv->settings.top_margin != 0) {
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FT_Vector trans = {
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.x = int_to_d6(render_priv->settings.left_margin),
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.y = -int_to_d6(render_priv->settings.top_margin),
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};
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FT_Outline_Translate(&drawing->glyph->outline, trans.x, trans.y);
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}
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ass_msg(render_priv->library, MSGL_DBG2,
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"Parsed vector clip: scale %d, scales (%f, %f) string [%s]\n",
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scale, drawing->scale_x, drawing->scale_y, drawing->text);
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}
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return p;
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}
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/**
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* \brief Parse style override tag.
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* \param p string to parse
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* \param pwr multiplier for some tag effects (comes from \t tags)
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*/
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static char *parse_tag(ASS_Renderer *render_priv, char *p, double pwr)
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{
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skip_to('\\');
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skip('\\');
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if ((*p == '}') || (*p == 0))
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return p;
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// New tags introduced in vsfilter 2.39
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if (mystrcmp(&p, "xbord")) {
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double val;
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if (mystrtod(&p, &val))
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val = render_priv->state.border_x * (1 - pwr) + val * pwr;
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else
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val = -1.;
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change_border(render_priv, val, render_priv->state.border_y);
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} else if (mystrcmp(&p, "ybord")) {
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double val;
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if (mystrtod(&p, &val))
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val = render_priv->state.border_y * (1 - pwr) + val * pwr;
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else
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val = -1.;
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change_border(render_priv, render_priv->state.border_x, val);
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} else if (mystrcmp(&p, "xshad")) {
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double val;
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if (mystrtod(&p, &val))
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val = render_priv->state.shadow_x * (1 - pwr) + val * pwr;
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else
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val = 0.;
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render_priv->state.shadow_x = val;
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} else if (mystrcmp(&p, "yshad")) {
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double val;
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if (mystrtod(&p, &val))
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val = render_priv->state.shadow_y * (1 - pwr) + val * pwr;
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else
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val = 0.;
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render_priv->state.shadow_y = val;
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} else if (mystrcmp(&p, "fax")) {
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double val;
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if (mystrtod(&p, &val))
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render_priv->state.fax =
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val * pwr + render_priv->state.fax * (1 - pwr);
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else
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render_priv->state.fax = 0.;
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} else if (mystrcmp(&p, "fay")) {
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double val;
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if (mystrtod(&p, &val))
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render_priv->state.fay =
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val * pwr + render_priv->state.fay * (1 - pwr);
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else
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render_priv->state.fay = 0.;
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} else if (mystrcmp(&p, "iclip")) {
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int x0, y0, x1, y1;
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int res = 1;
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char *start = p;
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skipopt('(');
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res &= mystrtoi(&p, &x0);
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skipopt(',');
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res &= mystrtoi(&p, &y0);
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skipopt(',');
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res &= mystrtoi(&p, &x1);
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skipopt(',');
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res &= mystrtoi(&p, &y1);
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skipopt(')');
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if (res) {
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render_priv->state.clip_x0 =
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render_priv->state.clip_x0 * (1 - pwr) + x0 * pwr;
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render_priv->state.clip_x1 =
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render_priv->state.clip_x1 * (1 - pwr) + x1 * pwr;
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render_priv->state.clip_y0 =
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render_priv->state.clip_y0 * (1 - pwr) + y0 * pwr;
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render_priv->state.clip_y1 =
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render_priv->state.clip_y1 * (1 - pwr) + y1 * pwr;
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render_priv->state.clip_mode = 1;
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} else if (!render_priv->state.clip_drawing) {
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p = parse_vector_clip(render_priv, start);
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render_priv->state.clip_drawing_mode = 1;
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} else
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render_priv->state.clip_mode = 0;
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} else if (mystrcmp(&p, "blur")) {
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double val;
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if (mystrtod(&p, &val)) {
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val = render_priv->state.blur * (1 - pwr) + val * pwr;
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val = (val < 0) ? 0 : val;
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val = (val > BLUR_MAX_RADIUS) ? BLUR_MAX_RADIUS : val;
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render_priv->state.blur = val;
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} else
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render_priv->state.blur = 0.0;
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// ASS standard tags
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} else if (mystrcmp(&p, "fsc")) {
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char tp = *p++;
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double val;
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if (tp == 'x') {
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if (mystrtod(&p, &val)) {
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val /= 100;
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render_priv->state.scale_x =
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render_priv->state.scale_x * (1 - pwr) + val * pwr;
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} else
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render_priv->state.scale_x =
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render_priv->state.style->ScaleX;
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} else if (tp == 'y') {
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if (mystrtod(&p, &val)) {
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val /= 100;
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render_priv->state.scale_y =
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render_priv->state.scale_y * (1 - pwr) + val * pwr;
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} else
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render_priv->state.scale_y =
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render_priv->state.style->ScaleY;
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}
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} else if (mystrcmp(&p, "fsp")) {
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double val;
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if (mystrtod(&p, &val))
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render_priv->state.hspacing =
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render_priv->state.hspacing * (1 - pwr) + val * pwr;
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else
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render_priv->state.hspacing = render_priv->state.style->Spacing;
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} else if (mystrcmp(&p, "fs")) {
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double val;
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if (mystrtod(&p, &val))
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val = render_priv->state.font_size * (1 - pwr) + val * pwr;
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else
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val = render_priv->state.style->FontSize;
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if (render_priv->state.font)
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change_font_size(render_priv, val);
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} else if (mystrcmp(&p, "bord")) {
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double val;
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if (mystrtod(&p, &val)) {
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if (render_priv->state.border_x == render_priv->state.border_y)
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val = render_priv->state.border_x * (1 - pwr) + val * pwr;
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} else
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val = -1.; // reset to default
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change_border(render_priv, val, val);
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} else if (mystrcmp(&p, "move")) {
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double x1, x2, y1, y2;
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long long t1, t2, delta_t, t;
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double x, y;
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double k;
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skip('(');
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mystrtod(&p, &x1);
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skip(',');
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mystrtod(&p, &y1);
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skip(',');
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mystrtod(&p, &x2);
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skip(',');
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mystrtod(&p, &y2);
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if (*p == ',') {
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skip(',');
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mystrtoll(&p, &t1);
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skip(',');
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mystrtoll(&p, &t2);
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ass_msg(render_priv->library, MSGL_DBG2,
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"movement6: (%f, %f) -> (%f, %f), (%" PRId64 " .. %"
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PRId64 ")\n", x1, y1, x2, y2, (int64_t) t1,
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(int64_t) t2);
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} else {
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t1 = 0;
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t2 = render_priv->state.event->Duration;
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ass_msg(render_priv->library, MSGL_DBG2,
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"movement: (%f, %f) -> (%f, %f)", x1, y1, x2, y2);
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}
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skip(')');
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delta_t = t2 - t1;
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t = render_priv->time - render_priv->state.event->Start;
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if (t < t1)
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k = 0.;
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else if (t > t2)
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k = 1.;
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else
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k = ((double) (t - t1)) / delta_t;
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x = k * (x2 - x1) + x1;
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y = k * (y2 - y1) + y1;
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if (render_priv->state.evt_type != EVENT_POSITIONED) {
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render_priv->state.pos_x = x;
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render_priv->state.pos_y = y;
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render_priv->state.detect_collisions = 0;
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render_priv->state.evt_type = EVENT_POSITIONED;
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}
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} else if (mystrcmp(&p, "frx")) {
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double val;
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if (mystrtod(&p, &val)) {
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val *= M_PI / 180;
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render_priv->state.frx =
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val * pwr + render_priv->state.frx * (1 - pwr);
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} else
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render_priv->state.frx = 0.;
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} else if (mystrcmp(&p, "fry")) {
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double val;
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if (mystrtod(&p, &val)) {
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val *= M_PI / 180;
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render_priv->state.fry =
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val * pwr + render_priv->state.fry * (1 - pwr);
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} else
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render_priv->state.fry = 0.;
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} else if (mystrcmp(&p, "frz") || mystrcmp(&p, "fr")) {
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double val;
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if (mystrtod(&p, &val)) {
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val *= M_PI / 180;
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render_priv->state.frz =
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val * pwr + render_priv->state.frz * (1 - pwr);
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} else
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render_priv->state.frz =
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M_PI * render_priv->state.style->Angle / 180.;
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} else if (mystrcmp(&p, "fn")) {
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char *start = p;
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char *family;
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skip_to('\\');
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if (p > start) {
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family = malloc(p - start + 1);
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strncpy(family, start, p - start);
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family[p - start] = '\0';
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} else
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family = strdup(render_priv->state.style->FontName);
|
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if (render_priv->state.family)
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free(render_priv->state.family);
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render_priv->state.family = family;
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update_font(render_priv);
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} else if (mystrcmp(&p, "alpha")) {
|
|
uint32_t val;
|
|
int i;
|
|
int hex = render_priv->track->track_type == TRACK_TYPE_ASS;
|
|
if (strtocolor(render_priv->library, &p, &val, hex)) {
|
|
unsigned char a = val >> 24;
|
|
for (i = 0; i < 4; ++i)
|
|
change_alpha(&render_priv->state.c[i], a, pwr);
|
|
} else {
|
|
change_alpha(&render_priv->state.c[0],
|
|
render_priv->state.style->PrimaryColour, pwr);
|
|
change_alpha(&render_priv->state.c[1],
|
|
render_priv->state.style->SecondaryColour, pwr);
|
|
change_alpha(&render_priv->state.c[2],
|
|
render_priv->state.style->OutlineColour, pwr);
|
|
change_alpha(&render_priv->state.c[3],
|
|
render_priv->state.style->BackColour, pwr);
|
|
}
|
|
// FIXME: simplify
|
|
} else if (mystrcmp(&p, "an")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val) && val) {
|
|
int v = (val - 1) / 3; // 0, 1 or 2 for vertical alignment
|
|
ass_msg(render_priv->library, MSGL_DBG2, "an %d", val);
|
|
if (v != 0)
|
|
v = 3 - v;
|
|
val = ((val - 1) % 3) + 1; // horizontal alignment
|
|
val += v * 4;
|
|
ass_msg(render_priv->library, MSGL_DBG2, "align %d", val);
|
|
render_priv->state.alignment = val;
|
|
} else
|
|
render_priv->state.alignment =
|
|
render_priv->state.style->Alignment;
|
|
} else if (mystrcmp(&p, "a")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val) && val)
|
|
// take care of a vsfilter quirk: handle illegal \a8 like \a5
|
|
render_priv->state.alignment = (val == 8) ? 5 : val;
|
|
else
|
|
render_priv->state.alignment =
|
|
render_priv->state.style->Alignment;
|
|
} else if (mystrcmp(&p, "pos")) {
|
|
double v1, v2;
|
|
skip('(');
|
|
mystrtod(&p, &v1);
|
|
skip(',');
|
|
mystrtod(&p, &v2);
|
|
skip(')');
|
|
ass_msg(render_priv->library, MSGL_DBG2, "pos(%f, %f)", v1, v2);
|
|
if (render_priv->state.evt_type == EVENT_POSITIONED) {
|
|
ass_msg(render_priv->library, MSGL_V, "Subtitle has a new \\pos "
|
|
"after \\move or \\pos, ignoring");
|
|
} else {
|
|
render_priv->state.evt_type = EVENT_POSITIONED;
|
|
render_priv->state.detect_collisions = 0;
|
|
render_priv->state.pos_x = v1;
|
|
render_priv->state.pos_y = v2;
|
|
}
|
|
} else if (mystrcmp(&p, "fad")) {
|
|
int a1, a2, a3;
|
|
long long t1, t2, t3, t4;
|
|
if (*p == 'e')
|
|
++p; // either \fad or \fade
|
|
skip('(');
|
|
mystrtoi(&p, &a1);
|
|
skip(',');
|
|
mystrtoi(&p, &a2);
|
|
if (*p == ')') {
|
|
// 2-argument version (\fad, according to specs)
|
|
// a1 and a2 are fade-in and fade-out durations
|
|
t1 = 0;
|
|
t4 = render_priv->state.event->Duration;
|
|
t2 = a1;
|
|
t3 = t4 - a2;
|
|
a1 = 0xFF;
|
|
a2 = 0;
|
|
a3 = 0xFF;
|
|
} else {
|
|
// 6-argument version (\fade)
|
|
// a1 and a2 (and a3) are opacity values
|
|
skip(',');
|
|
mystrtoi(&p, &a3);
|
|
skip(',');
|
|
mystrtoll(&p, &t1);
|
|
skip(',');
|
|
mystrtoll(&p, &t2);
|
|
skip(',');
|
|
mystrtoll(&p, &t3);
|
|
skip(',');
|
|
mystrtoll(&p, &t4);
|
|
}
|
|
skip(')');
|
|
render_priv->state.fade =
|
|
interpolate_alpha(render_priv->time -
|
|
render_priv->state.event->Start, t1, t2,
|
|
t3, t4, a1, a2, a3);
|
|
} else if (mystrcmp(&p, "org")) {
|
|
int v1, v2;
|
|
skip('(');
|
|
mystrtoi(&p, &v1);
|
|
skip(',');
|
|
mystrtoi(&p, &v2);
|
|
skip(')');
|
|
ass_msg(render_priv->library, MSGL_DBG2, "org(%d, %d)", v1, v2);
|
|
if (!render_priv->state.have_origin) {
|
|
render_priv->state.org_x = v1;
|
|
render_priv->state.org_y = v2;
|
|
render_priv->state.have_origin = 1;
|
|
render_priv->state.detect_collisions = 0;
|
|
}
|
|
} else if (mystrcmp(&p, "t")) {
|
|
double v[3];
|
|
int v1, v2;
|
|
double v3;
|
|
int cnt;
|
|
long long t1, t2, t, delta_t;
|
|
double k;
|
|
skip('(');
|
|
for (cnt = 0; cnt < 3; ++cnt) {
|
|
if (*p == '\\')
|
|
break;
|
|
v[cnt] = strtod(p, &p);
|
|
skip(',');
|
|
}
|
|
if (cnt == 3) {
|
|
v1 = v[0];
|
|
v2 = (v[1] < v1) ? render_priv->state.event->Duration : v[1];
|
|
v3 = v[2];
|
|
} else if (cnt == 2) {
|
|
v1 = v[0];
|
|
v2 = (v[1] < v1) ? render_priv->state.event->Duration : v[1];
|
|
v3 = 1.;
|
|
} else if (cnt == 1) {
|
|
v1 = 0;
|
|
v2 = render_priv->state.event->Duration;
|
|
v3 = v[0];
|
|
} else { // cnt == 0
|
|
v1 = 0;
|
|
v2 = render_priv->state.event->Duration;
|
|
v3 = 1.;
|
|
}
|
|
render_priv->state.detect_collisions = 0;
|
|
t1 = v1;
|
|
t2 = v2;
|
|
delta_t = v2 - v1;
|
|
if (v3 < 0.)
|
|
v3 = 0.;
|
|
t = render_priv->time - render_priv->state.event->Start; // FIXME: move to render_context
|
|
if (t <= t1)
|
|
k = 0.;
|
|
else if (t >= t2)
|
|
k = 1.;
|
|
else {
|
|
assert(delta_t != 0.);
|
|
k = pow(((double) (t - t1)) / delta_t, v3);
|
|
}
|
|
while (*p == '\\')
|
|
p = parse_tag(render_priv, p, k); // maybe k*pwr ? no, specs forbid nested \t's
|
|
skip_to(')'); // in case there is some unknown tag or a comment
|
|
skip(')');
|
|
} else if (mystrcmp(&p, "clip")) {
|
|
char *start = p;
|
|
int x0, y0, x1, y1;
|
|
int res = 1;
|
|
skipopt('(');
|
|
res &= mystrtoi(&p, &x0);
|
|
skipopt(',');
|
|
res &= mystrtoi(&p, &y0);
|
|
skipopt(',');
|
|
res &= mystrtoi(&p, &x1);
|
|
skipopt(',');
|
|
res &= mystrtoi(&p, &y1);
|
|
skipopt(')');
|
|
if (res) {
|
|
render_priv->state.clip_x0 =
|
|
render_priv->state.clip_x0 * (1 - pwr) + x0 * pwr;
|
|
render_priv->state.clip_x1 =
|
|
render_priv->state.clip_x1 * (1 - pwr) + x1 * pwr;
|
|
render_priv->state.clip_y0 =
|
|
render_priv->state.clip_y0 * (1 - pwr) + y0 * pwr;
|
|
render_priv->state.clip_y1 =
|
|
render_priv->state.clip_y1 * (1 - pwr) + y1 * pwr;
|
|
// Might be a vector clip
|
|
} else if (!render_priv->state.clip_drawing) {
|
|
p = parse_vector_clip(render_priv, start);
|
|
render_priv->state.clip_drawing_mode = 0;
|
|
} else {
|
|
render_priv->state.clip_x0 = 0;
|
|
render_priv->state.clip_y0 = 0;
|
|
render_priv->state.clip_x1 = render_priv->track->PlayResX;
|
|
render_priv->state.clip_y1 = render_priv->track->PlayResY;
|
|
}
|
|
} else if (mystrcmp(&p, "c")) {
|
|
uint32_t val;
|
|
int hex = render_priv->track->track_type == TRACK_TYPE_ASS;
|
|
if (!strtocolor(render_priv->library, &p, &val, hex))
|
|
val = render_priv->state.style->PrimaryColour;
|
|
ass_msg(render_priv->library, MSGL_DBG2, "color: %X", val);
|
|
change_color(&render_priv->state.c[0], val, pwr);
|
|
} else if ((*p >= '1') && (*p <= '4') && (++p)
|
|
&& (mystrcmp(&p, "c") || mystrcmp(&p, "a"))) {
|
|
char n = *(p - 2);
|
|
int cidx = n - '1';
|
|
char cmd = *(p - 1);
|
|
uint32_t val;
|
|
int hex = render_priv->track->track_type == TRACK_TYPE_ASS;
|
|
assert((n >= '1') && (n <= '4'));
|
|
if (!strtocolor(render_priv->library, &p, &val, hex))
|
|
switch (n) {
|
|
case '1':
|
|
val = render_priv->state.style->PrimaryColour;
|
|
break;
|
|
case '2':
|
|
val = render_priv->state.style->SecondaryColour;
|
|
break;
|
|
case '3':
|
|
val = render_priv->state.style->OutlineColour;
|
|
break;
|
|
case '4':
|
|
val = render_priv->state.style->BackColour;
|
|
break;
|
|
default:
|
|
val = 0;
|
|
break; // impossible due to assert; avoid compilation warning
|
|
}
|
|
switch (cmd) {
|
|
case 'c':
|
|
change_color(render_priv->state.c + cidx, val, pwr);
|
|
break;
|
|
case 'a':
|
|
change_alpha(render_priv->state.c + cidx, val >> 24, pwr);
|
|
break;
|
|
default:
|
|
ass_msg(render_priv->library, MSGL_WARN, "Bad command: %c%c",
|
|
n, cmd);
|
|
break;
|
|
}
|
|
ass_msg(render_priv->library, MSGL_DBG2, "single c/a at %f: %c%c = %X",
|
|
pwr, n, cmd, render_priv->state.c[cidx]);
|
|
} else if (mystrcmp(&p, "r")) {
|
|
reset_render_context(render_priv);
|
|
} else if (mystrcmp(&p, "be")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val)) {
|
|
// Clamp to a safe upper limit, since high values need excessive CPU
|
|
val = (val < 0) ? 0 : val;
|
|
val = (val > MAX_BE) ? MAX_BE : val;
|
|
render_priv->state.be = val;
|
|
} else
|
|
render_priv->state.be = 0;
|
|
} else if (mystrcmp(&p, "b")) {
|
|
int b;
|
|
if (mystrtoi(&p, &b)) {
|
|
if (pwr >= .5)
|
|
render_priv->state.bold = b;
|
|
} else
|
|
render_priv->state.bold = render_priv->state.style->Bold;
|
|
update_font(render_priv);
|
|
} else if (mystrcmp(&p, "i")) {
|
|
int i;
|
|
if (mystrtoi(&p, &i)) {
|
|
if (pwr >= .5)
|
|
render_priv->state.italic = i;
|
|
} else
|
|
render_priv->state.italic = render_priv->state.style->Italic;
|
|
update_font(render_priv);
|
|
} else if (mystrcmp(&p, "kf") || mystrcmp(&p, "K")) {
|
|
int val = 0;
|
|
mystrtoi(&p, &val);
|
|
render_priv->state.effect_type = EF_KARAOKE_KF;
|
|
if (render_priv->state.effect_timing)
|
|
render_priv->state.effect_skip_timing +=
|
|
render_priv->state.effect_timing;
|
|
render_priv->state.effect_timing = val * 10;
|
|
} else if (mystrcmp(&p, "ko")) {
|
|
int val = 0;
|
|
mystrtoi(&p, &val);
|
|
render_priv->state.effect_type = EF_KARAOKE_KO;
|
|
if (render_priv->state.effect_timing)
|
|
render_priv->state.effect_skip_timing +=
|
|
render_priv->state.effect_timing;
|
|
render_priv->state.effect_timing = val * 10;
|
|
} else if (mystrcmp(&p, "k")) {
|
|
int val = 0;
|
|
mystrtoi(&p, &val);
|
|
render_priv->state.effect_type = EF_KARAOKE;
|
|
if (render_priv->state.effect_timing)
|
|
render_priv->state.effect_skip_timing +=
|
|
render_priv->state.effect_timing;
|
|
render_priv->state.effect_timing = val * 10;
|
|
} else if (mystrcmp(&p, "shad")) {
|
|
double val;
|
|
if (mystrtod(&p, &val)) {
|
|
if (render_priv->state.shadow_x == render_priv->state.shadow_y)
|
|
val = render_priv->state.shadow_x * (1 - pwr) + val * pwr;
|
|
} else
|
|
val = 0.;
|
|
render_priv->state.shadow_x = render_priv->state.shadow_y = val;
|
|
} else if (mystrcmp(&p, "s")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val) && val)
|
|
render_priv->state.flags |= DECO_STRIKETHROUGH;
|
|
else
|
|
render_priv->state.flags &= ~DECO_STRIKETHROUGH;
|
|
} else if (mystrcmp(&p, "u")) {
|
|
int val;
|
|
if (mystrtoi(&p, &val) && val)
|
|
render_priv->state.flags |= DECO_UNDERLINE;
|
|
else
|
|
render_priv->state.flags &= ~DECO_UNDERLINE;
|
|
} else if (mystrcmp(&p, "pbo")) {
|
|
double val = 0;
|
|
if (mystrtod(&p, &val))
|
|
render_priv->state.drawing->pbo = val;
|
|
} else if (mystrcmp(&p, "p")) {
|
|
int val;
|
|
if (!mystrtoi(&p, &val))
|
|
val = 0;
|
|
if (val)
|
|
render_priv->state.drawing->scale = val;
|
|
render_priv->state.drawing_mode = !!val;
|
|
} else if (mystrcmp(&p, "q")) {
|
|
int val;
|
|
if (!mystrtoi(&p, &val))
|
|
val = render_priv->track->WrapStyle;
|
|
render_priv->state.wrap_style = val;
|
|
}
|
|
|
|
return p;
|
|
}
|
|
|
|
void apply_transition_effects(ASS_Renderer *render_priv, ASS_Event *event)
|
|
{
|
|
int v[4];
|
|
int cnt;
|
|
char *p = event->Effect;
|
|
|
|
if (!p || !*p)
|
|
return;
|
|
|
|
cnt = 0;
|
|
while (cnt < 4 && (p = strchr(p, ';'))) {
|
|
v[cnt++] = atoi(++p);
|
|
}
|
|
|
|
if (strncmp(event->Effect, "Banner;", 7) == 0) {
|
|
int delay;
|
|
if (cnt < 1) {
|
|
ass_msg(render_priv->library, MSGL_V,
|
|
"Error parsing effect: '%s'", event->Effect);
|
|
return;
|
|
}
|
|
if (cnt >= 2 && v[1] == 0) // right-to-left
|
|
render_priv->state.scroll_direction = SCROLL_RL;
|
|
else // left-to-right
|
|
render_priv->state.scroll_direction = SCROLL_LR;
|
|
|
|
delay = v[0];
|
|
if (delay == 0)
|
|
delay = 1; // ?
|
|
render_priv->state.scroll_shift =
|
|
(render_priv->time - render_priv->state.event->Start) / delay;
|
|
render_priv->state.evt_type = EVENT_HSCROLL;
|
|
return;
|
|
}
|
|
|
|
if (strncmp(event->Effect, "Scroll up;", 10) == 0) {
|
|
render_priv->state.scroll_direction = SCROLL_BT;
|
|
} else if (strncmp(event->Effect, "Scroll down;", 12) == 0) {
|
|
render_priv->state.scroll_direction = SCROLL_TB;
|
|
} else {
|
|
ass_msg(render_priv->library, MSGL_V,
|
|
"Unknown transition effect: '%s'", event->Effect);
|
|
return;
|
|
}
|
|
// parse scroll up/down parameters
|
|
{
|
|
int delay;
|
|
int y0, y1;
|
|
if (cnt < 3) {
|
|
ass_msg(render_priv->library, MSGL_V,
|
|
"Error parsing effect: '%s'", event->Effect);
|
|
return;
|
|
}
|
|
delay = v[2];
|
|
if (delay == 0)
|
|
delay = 1; // ?
|
|
render_priv->state.scroll_shift =
|
|
(render_priv->time - render_priv->state.event->Start) / delay;
|
|
if (v[0] < v[1]) {
|
|
y0 = v[0];
|
|
y1 = v[1];
|
|
} else {
|
|
y0 = v[1];
|
|
y1 = v[0];
|
|
}
|
|
if (y1 == 0)
|
|
y1 = render_priv->track->PlayResY; // y0=y1=0 means fullscreen scrolling
|
|
render_priv->state.clip_y0 = y0;
|
|
render_priv->state.clip_y1 = y1;
|
|
render_priv->state.evt_type = EVENT_VSCROLL;
|
|
render_priv->state.detect_collisions = 0;
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* \brief Get next ucs4 char from string, parsing and executing style overrides
|
|
* \param str string pointer
|
|
* \return ucs4 code of the next char
|
|
* On return str points to the unparsed part of the string
|
|
*/
|
|
unsigned get_next_char(ASS_Renderer *render_priv, char **str)
|
|
{
|
|
char *p = *str;
|
|
unsigned chr;
|
|
if (*p == '{') { // '\0' goes here
|
|
p++;
|
|
while (1) {
|
|
p = parse_tag(render_priv, p, 1.);
|
|
if (*p == '}') { // end of tag
|
|
p++;
|
|
if (*p == '{') {
|
|
p++;
|
|
continue;
|
|
} else
|
|
break;
|
|
} else if (*p != '\\')
|
|
ass_msg(render_priv->library, MSGL_V,
|
|
"Unable to parse: '%s'", p);
|
|
if (*p == 0)
|
|
break;
|
|
}
|
|
}
|
|
if (*p == '\t') {
|
|
++p;
|
|
*str = p;
|
|
return ' ';
|
|
}
|
|
if (*p == '\\') {
|
|
if ((p[1] == 'N') || ((p[1] == 'n') &&
|
|
(render_priv->state.wrap_style == 2))) {
|
|
p += 2;
|
|
*str = p;
|
|
return '\n';
|
|
} else if (p[1] == 'n') {
|
|
p += 2;
|
|
*str = p;
|
|
return ' ';
|
|
} else if (p[1] == 'h') {
|
|
p += 2;
|
|
*str = p;
|
|
return NBSP;
|
|
}
|
|
}
|
|
chr = ass_utf8_get_char((char **) &p);
|
|
*str = p;
|
|
return chr;
|
|
}
|