From fb6a1101ce1796ce2f50d6aa23b9ca5809269ec6 Mon Sep 17 00:00:00 2001 From: eugeni Date: Fri, 16 Feb 2007 17:54:47 +0000 Subject: Implement \frx and \fry (and reimplement \frz) as 3d rotations. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22233 b3059339-0415-0410-9bf9-f77b7e298cf2 --- libass/ass_render.c | 126 +++++++++++++++++++++++++++++++++++++++++++--------- 1 file changed, 104 insertions(+), 22 deletions(-) (limited to 'libass/ass_render.c') diff --git a/libass/ass_render.c b/libass/ass_render.c index 90fef20b10..0f290c6125 100644 --- a/libass/ass_render.c +++ b/libass/ass_render.c @@ -98,7 +98,7 @@ typedef struct glyph_info_s { // int height; int be; // blur edges int shadow; - double frz; // z-axis rotation + double frx, fry, frz; // rotation glyph_hash_key_t hash_key; } glyph_info_t; @@ -128,7 +128,7 @@ typedef struct render_context_s { FT_Stroker stroker; int alignment; // alignment overrides go here; if zero, style value will be used - double frz; + double frx, fry, frz; enum { EVENT_NORMAL, // "normal" top-, sub- or mid- title EVENT_POSITIONED, // happens after pos(,), margins are ignored EVENT_HSCROLL, // "Banner" transition effect, text_width is unlimited @@ -768,10 +768,16 @@ static char* parse_tag(char* p, double pwr) { render_context.pos_y = y; render_context.detect_collisions = 0; render_context.evt_type = EVENT_POSITIONED; - } else if (mystrcmp(&p, "frx") || mystrcmp(&p, "fry")) { + } else if (mystrcmp(&p, "frx")) { double val; mystrtod(&p, &val); - mp_msg(MSGT_ASS, MSGL_V, "frx/fry unimplemented \n"); + val *= M_PI / 180; + render_context.frx = val * pwr + render_context.frx * (1-pwr); + } else if (mystrcmp(&p, "fry")) { + double val; + mystrtod(&p, &val); + val *= M_PI / 180; + render_context.fry = val * pwr + render_context.fry * (1-pwr); } else if (mystrcmp(&p, "frz") || mystrcmp(&p, "fr")) { double val; mystrtod(&p, &val); @@ -1151,6 +1157,7 @@ static void reset_render_context(void) render_context.hspacing = 0; // FIXME render_context.be = 0; render_context.shadow = render_context.style->Shadow; + render_context.frx = render_context.fry = 0.; render_context.frz = M_PI * render_context.style->Angle / 180.; // FIXME: does not reset unsupported attributes. @@ -1210,6 +1217,8 @@ static int get_glyph(int symbol, glyph_info_t* info, FT_Vector* advance) key->outline = (render_context.border * 0xFFFF); // convert to 16.16 key->scale_x = (render_context.scale_x * 0xFFFF); key->scale_y = (render_context.scale_y * 0xFFFF); + key->frx = (render_context.frx * 0xFFFF); + key->fry = (render_context.fry * 0xFFFF); key->frz = (render_context.frz * 0xFFFF); key->advance = *advance; key->bold = render_context.bold; @@ -1521,6 +1530,94 @@ static void get_base_point(FT_BBox bbox, int alignment, int* bx, int* by) } } +/** + * \brief Multiply 4-vector by 4-matrix + * \param a 4-vector + * \param m 4-matrix] + * \param b out: 4-vector + * Calculates a * m and stores result in b + */ +static inline void transform_point_3d(double *a, double *m, double *b) +{ + b[0] = a[0] * m[0] + a[1] * m[4] + a[2] * m[8] + a[3] * m[12]; + b[1] = a[0] * m[1] + a[1] * m[5] + a[2] * m[9] + a[3] * m[13]; + b[2] = a[0] * m[2] + a[1] * m[6] + a[2] * m[10] + a[3] * m[14]; + b[3] = a[0] * m[3] + a[1] * m[7] + a[2] * m[11] + a[3] * m[15]; +} + +/** + * \brief Apply 3d transformation to a vector + * \param v FreeType vector (2d) + * \param m 4-matrix + * Transforms v by m, projects the result back to the screen plane + * Result is returned in v. + */ +static inline void transform_vector_3d(FT_Vector* v, double *m) { + double a[4], b[4]; + a[0] = d6_to_double(v->x); + a[1] = d6_to_double(v->y); + a[2] = 0.; + a[3] = 1.; + transform_point_3d(a, m, b); + if (b[3] < 0.001 && b[3] > -0.001) + b[3] = b[3] < 0. ? -0.001 : 0.001; + v->x = double_to_d6(b[0] / b[3]); + v->y = double_to_d6(b[1] / b[3]); +} + +/** + * \brief Apply 3d transformation to a glyph + * \param glyph FreeType glyph + * \param m 4-matrix + * Transforms glyph by m, projects the result back to the screen plane + * Result is returned in glyph. + */ +static inline void transform_glyph_3d(FT_Glyph glyph, double *m) { + int i; + FT_Outline* outline = &((FT_OutlineGlyph)glyph)->outline; + + for (i=0; in_points; i++) + transform_vector_3d(outline->points + i, m); + + transform_vector_3d(&glyph->advance, m); +} + +/** + * \brief Apply 3d transformation to several objects + * \param vec FreeType vector + * \param glyph FreeType glyph + * \param glyph2 FreeType glyph + * \param frx x-axis rotation angle + * \param fry y-axis rotation angle + * \param frz z-axis rotation angle + * Rotates the given vector and both glyphs by frx, fry and frz. + */ +void transform_3d(FT_Vector* vec, FT_Glyph* glyph, FT_Glyph* glyph2, double frx, double fry, double frz) +{ + if (frx != 0. || fry != 0. || frz != 0.) { + double m[16]; + double sx = sin(frx); + double sy = sin(fry); + double sz = sin(frz); + double cx = cos(frx); + double cy = cos(fry); + double cz = cos(frz); + m[0] = cy * cz; m[1] = cz*sx*sy + sz*cx; m[2] = sz*sx - cz*cx*sy; m[3] = 0.0; + m[4] = -sz*cy; m[5] = cz*cx - sz*sy*sx; m[6] = sz*sy*cx + cz*sx; m[7] = 0.0; + m[8] = sy; m[9] = -sx*cy; m[10] = cx*cy; m[11] = 0.0; + m[12] = 0.0; m[13] = 0.0; m[14] = 0.0; m[15] = 1.0; + + if (glyph && *glyph) + transform_glyph_3d(*glyph, m); + + if (glyph2 && *glyph2) + transform_glyph_3d(*glyph2, m); + + if (vec) + transform_vector_3d(vec, m); + } +} + /** * \brief Main ass rendering function, glues everything together * \param event event to render @@ -1632,6 +1729,8 @@ static int ass_render_event(ass_event_t* event, event_images_t* event_images) text_info.glyphs[text_info.length].effect_skip_timing = render_context.effect_skip_timing; text_info.glyphs[text_info.length].be = render_context.be; text_info.glyphs[text_info.length].shadow = render_context.shadow; + text_info.glyphs[text_info.length].frx = render_context.frx; + text_info.glyphs[text_info.length].fry = render_context.fry; text_info.glyphs[text_info.length].frz = render_context.frz; ass_font_get_asc_desc(render_context.font, code, &text_info.glyphs[text_info.length].asc, @@ -1775,9 +1874,7 @@ static int ass_render_event(ass_event_t* event, event_images_t* event_images) // rotate glyphs if needed { - double angle = 0.; FT_Vector center; - FT_Matrix matrix_rotate; if (render_context.have_origin) { center.x = render_context.org_x; @@ -1794,17 +1891,6 @@ static int ass_render_event(ass_event_t* event, event_images_t* event_images) FT_Vector start_old; glyph_info_t* info = text_info.glyphs + i; - if (info->frz < 0.00001 && info->frz > -0.00001) - continue; - - if (info->frz != angle) { - angle = info->frz; - matrix_rotate.xx = (FT_Fixed)( cos( angle ) * 0x10000L ); - matrix_rotate.xy = (FT_Fixed)( -sin( angle ) * 0x10000L ); - matrix_rotate.yx = (FT_Fixed)( sin( angle ) * 0x10000L ); - matrix_rotate.yy = (FT_Fixed)( cos( angle ) * 0x10000L ); - } - // calculating shift vector // shift = (position - center)*M - (position - center) start.x = int_to_d6(info->pos.x + device_x - center.x); @@ -1812,7 +1898,7 @@ static int ass_render_event(ass_event_t* event, event_images_t* event_images) start_old.x = start.x; start_old.y = start.y; - FT_Vector_Transform(&start, &matrix_rotate); + transform_3d(&start, &info->glyph, &info->outline_glyph, info->frx, info->fry, info->frz); start.x -= start_old.x; start.y -= start_old.y; @@ -1820,10 +1906,6 @@ static int ass_render_event(ass_event_t* event, event_images_t* event_images) info->pos.x += d6_to_int(start.x); info->pos.y -= d6_to_int(start.y); - if (info->glyph) - FT_Glyph_Transform( info->glyph, &matrix_rotate, 0 ); - if (info->outline_glyph) - FT_Glyph_Transform( info->outline_glyph, &matrix_rotate, 0 ); } } -- cgit v1.2.3