diff options
Diffstat (limited to 'src-old/render.c')
| -rw-r--r-- | src-old/render.c | 332 |
1 files changed, 0 insertions, 332 deletions
diff --git a/src-old/render.c b/src-old/render.c deleted file mode 100644 index 6ac09fc..0000000 --- a/src-old/render.c +++ /dev/null @@ -1,332 +0,0 @@ -/* - * render.c - * - * Copyright © 2013-2018 Thomas White <taw@bitwiz.org.uk> - * - * This file is part of Colloquium. - * - * Colloquium is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - */ - - -#ifdef HAVE_CONFIG_H -#include <config.h> -#endif - -#include <cairo.h> -#include <cairo-pdf.h> -#include <pango/pangocairo.h> -#include <assert.h> -#include <string.h> -#include <stdlib.h> -#include <math.h> -#include <gdk-pixbuf/gdk-pixbuf.h> -#include <gdk/gdk.h> - -#include "sc_parse.h" -#include "sc_interp.h" -#include "presentation.h" -#include "frame.h" -#include "render.h" -#include "imagestore.h" -#include "utils.h" - - -static void do_background(cairo_t *cr, struct frame *fr) -{ - cairo_pattern_t *patt = NULL; - - cairo_new_path(cr); - cairo_rectangle(cr, 0.0, 0.0, fr->w, fr->h); - - switch ( fr->grad ) { - - case GRAD_NONE: - cairo_set_source_rgba(cr, fr->bgcol[0], - fr->bgcol[1], - fr->bgcol[2], - fr->bgcol[3]); - break; - - case GRAD_VERT: - patt = cairo_pattern_create_linear(0.0, 0.0, - 0.0, fr->h); - cairo_pattern_add_color_stop_rgba(patt, 0.0, fr->bgcol[0], - fr->bgcol[1], - fr->bgcol[2], - fr->bgcol[3]); - cairo_pattern_add_color_stop_rgba(patt, 1.0, fr->bgcol2[0], - fr->bgcol2[1], - fr->bgcol2[2], - fr->bgcol2[3]); - cairo_set_source(cr, patt); - break; - - case GRAD_HORIZ: - patt = cairo_pattern_create_linear(0.0, 0.0, - fr->w, 0.0); - cairo_pattern_add_color_stop_rgba(patt, 0.0, fr->bgcol[0], - fr->bgcol[1], - fr->bgcol[2], - fr->bgcol[3]); - cairo_pattern_add_color_stop_rgba(patt, 1.0, fr->bgcol2[0], - fr->bgcol2[1], - fr->bgcol2[2], - fr->bgcol2[3]); - cairo_set_source(cr, patt); - break; - - } - - cairo_fill(cr); - if ( patt != NULL ) cairo_pattern_destroy(patt); -} - - -static int draw_frame(cairo_t *cr, struct frame *fr, ImageStore *is, - double min_y, double max_y) -{ - int i; - double hpos = 0.0; - - cairo_save(cr); - do_background(cr, fr); - - /* Actually render the contents */ - cairo_translate(cr, fr->pad_l, fr->pad_t); - for ( i=0; i<fr->n_paras; i++ ) { - - double cur_h = paragraph_height(fr->paras[i]); - - cairo_save(cr); - cairo_translate(cr, 0.0, hpos); - - if ( (hpos + cur_h > min_y) && (hpos < max_y) ) { - render_paragraph(cr, fr->paras[i], is); - } /* else paragraph is not visible */ - - hpos += cur_h; - cairo_restore(cr); - - } - cairo_restore(cr); - - return 0; -} - - -int recursive_draw(struct frame *fr, cairo_t *cr, - ImageStore *is, - double min_y, double max_y) -{ - int i; - - draw_frame(cr, fr, is, min_y, max_y); - - for ( i=0; i<fr->num_children; i++ ) { - cairo_save(cr); - cairo_translate(cr, fr->children[i]->x, fr->children[i]->y); - recursive_draw(fr->children[i], cr, is, - min_y - fr->children[i]->y, - max_y - fr->children[i]->y); - cairo_restore(cr); - } - - return 0; -} - - -void wrap_frame(struct frame *fr, PangoContext *pc) -{ - int i; - double w; - - w = fr->w - fr->pad_l - fr->pad_r; - - for ( i=0; i<fr->n_paras; i++ ) { - wrap_paragraph(fr->paras[i], pc, w, 0, 0); - } -} - - -int recursive_wrap(struct frame *fr, PangoContext *pc) -{ - int i; - - wrap_frame(fr, pc); - - for ( i=0; i<fr->num_children; i++ ) { - recursive_wrap(fr->children[i], pc); - } - - return 0; -} - - -struct frame *interp_and_shape(SCBlock *scblocks, Stylesheet *stylesheet, - SCCallbackList *cbl, ImageStore *is, - int slide_number, - PangoContext *pc, double w, double h, - PangoLanguage *lang) -{ - SCInterpreter *scin; - char snum[64]; - struct frame *top; - - top = frame_new(); - top->resizable = 0; - top->x = 0.0; - top->y = 0.0; - top->w = w; - top->h = h; - top->scblocks = scblocks; - - scin = sc_interp_new(pc, lang, is, top); - if ( scin == NULL ) { - fprintf(stderr, "Failed to set up interpreter.\n"); - frame_free(top); - return NULL; - } - - sc_interp_set_callbacks(scin, cbl); - - snprintf(snum, 63, "%i", slide_number); - sc_interp_set_constant(scin, SCCONST_SLIDENUMBER, snum); - - top->fontdesc = pango_font_description_copy(sc_interp_get_fontdesc(scin)); - top->col[0] = sc_interp_get_fgcol(scin)[0]; - top->col[1] = sc_interp_get_fgcol(scin)[1]; - top->col[2] = sc_interp_get_fgcol(scin)[2]; - top->col[3] = sc_interp_get_fgcol(scin)[3]; - - sc_interp_add_block(scin, scblocks, stylesheet); - - sc_interp_destroy(scin); - - return top; -} - - -static struct frame *render_sc_with_context(SCBlock *scblocks, - cairo_t *cr, double log_w, double log_h, - Stylesheet *stylesheet, SCCallbackList *cbl, - ImageStore *is, - int slide_number, PangoLanguage *lang, - PangoContext *pc) -{ - struct frame *top; - - cairo_rectangle(cr, 0.0, 0.0, log_w, log_h); - cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); - cairo_fill(cr); - - top = interp_and_shape(scblocks, stylesheet, cbl, is, - slide_number, pc, log_w, log_h, lang); - - recursive_wrap(top, pc); - - recursive_draw(top, cr, is, 0.0, log_h); - - return top; -} - - -cairo_surface_t *render_sc(SCBlock *scblocks, int w, int h, - double log_w, double log_h, - Stylesheet *stylesheet, SCCallbackList *cbl, - ImageStore *is, - int slide_number, struct frame **ptop, - PangoLanguage *lang) -{ - cairo_surface_t *surf; - cairo_t *cr; - struct frame *top; - PangoContext *pc; - - surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h); - cr = cairo_create(surf); - pc = pango_cairo_create_context(cr); - cairo_scale(cr, w/log_w, h/log_h); - top = render_sc_with_context(scblocks, cr, log_w, log_h, - stylesheet, cbl, is, slide_number, - lang, pc); - g_object_unref(pc); - cairo_destroy(cr); - - *ptop = top; - - return surf; -} - - -int export_pdf(struct presentation *p, const char *filename) -{ - double r; - double w = 2048.0; - double scale; - cairo_surface_t *surf; - cairo_t *cr; - SCBlock *bl; - int i; - PangoContext *pc; - - r = p->slide_height / p->slide_width; - - surf = cairo_pdf_surface_create(filename, w, w*r); - if ( cairo_surface_status(surf) != CAIRO_STATUS_SUCCESS ) { - fprintf(stderr, _("Couldn't create Cairo surface\n")); - return 1; - } - - cr = cairo_create(surf); - scale = w / p->slide_width; - pc = pango_cairo_create_context(cr); - - i = 1; - bl = p->scblocks; - while ( bl != NULL ) { - - if ( safe_strcmp(sc_block_name(bl), "slide") != 0 ) { - bl = sc_block_next(bl); - continue; - } - - cairo_save(cr); - - cairo_scale(cr, scale, scale); - - cairo_rectangle(cr, 0.0, 0.0, p->slide_width, p->slide_height); - cairo_set_source_rgb(cr, 1.0, 1.0, 1.0); - cairo_fill(cr); - - render_sc_with_context(bl, cr, p->slide_width, - p->slide_height, p->stylesheet, NULL, - p->is, i, p->lang, pc); - - cairo_restore(cr); - - cairo_show_page(cr); - - bl = sc_block_next(bl); - i++; - - } - - g_object_unref(pc); - cairo_surface_finish(surf); - cairo_destroy(cr); - - return 0; -} |