Update...

1 files changed, 270 insertions, 0 deletions

diff --git a/src/storycode.c b/src/storycode.c
new file mode 100644
index 0000000..a0a6da9
--- /dev/null
+++ b/src/storycode.c
@@ -0,0 +1,270 @@
+/*
+ * slide_render.c
+ *
+ * Colloquium - A tiny presentation program
+ *
+ * Copyright (c) 2011 Thomas White <taw@bitwiz.org.uk>
+ *
+ * This program 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 "storycode.h"
+#include "presentation.h"
+#include "objects.h"
+#include "stylesheet.h"
+
+
+static void render_bgblock(cairo_t *cr, struct bgblock *b)
+{
+	GdkColor col1;
+	GdkColor col2;
+	cairo_pattern_t *patt = NULL;
+	double cx, cy, r, r1, r2;
+
+	cairo_rectangle(cr, b->min_x, b->min_y,
+	                    b->max_x - b->min_x,
+	                    b->max_y - b->min_y);
+
+	switch ( b->type ) {
+
+		case BGBLOCK_SOLID :
+		gdk_color_parse(b->colour1, &col1);
+		gdk_cairo_set_source_color(cr, &col1);
+		/* FIXME: Honour alpha as well */
+		cairo_fill(cr);
+		break;
+
+		case BGBLOCK_GRADIENT_CIRCULAR :
+		cx = b->min_x + (b->max_x-b->min_x)/2.0;
+		cy = b->min_y + (b->max_y-b->min_y)/2.0;
+		r1 = (b->max_x-b->min_x)/2.0;
+		r2 = (b->max_y-b->min_y)/2.0;
+		r = r1 > r2 ? r1 : r2;
+		patt = cairo_pattern_create_radial(cx, cy, r, cx, cy, 0.0);
+		/* Fall-through */
+
+		case BGBLOCK_GRADIENT_X :
+		if ( patt == NULL ) {
+			patt = cairo_pattern_create_linear(b->min_x, 0.0,
+		                                           b->max_y, 0.0);
+		}
+		/* Fall-through */
+
+		case BGBLOCK_GRADIENT_Y :
+		if ( patt == NULL ) {
+			patt = cairo_pattern_create_linear(0.0, b->min_y,
+		                                           0.0, b->max_y);
+		}
+
+		gdk_color_parse(b->colour1, &col1);
+		gdk_color_parse(b->colour2, &col2);
+		cairo_pattern_add_color_stop_rgba(patt, 0.0, col1.red/65535.0,
+		                                             col1.green/65535.0,
+		                                             col1.blue/65535.0,
+		                                             b->alpha1);
+		cairo_pattern_add_color_stop_rgba(patt, 1.0, col2.red/65535.0,
+		                                             col2.green/65535.0,
+		                                             col2.blue/65535.0,
+		                                             b->alpha2);
+		cairo_set_source(cr, patt);
+		cairo_fill(cr);
+		cairo_pattern_destroy(patt);
+		break;
+
+		case BGBLOCK_IMAGE :
+		cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
+		cairo_fill(cr);
+
+	}
+}
+
+
+static void render_slide_bits(struct slide *s, cairo_t *cr)
+{
+	int i;
+	cairo_font_options_t *fopts;
+
+	fopts = cairo_font_options_create();
+	cairo_font_options_set_hint_style(fopts, CAIRO_HINT_STYLE_NONE);
+	cairo_font_options_set_hint_metrics(fopts, CAIRO_HINT_METRICS_OFF);
+	cairo_font_options_set_antialias(fopts, CAIRO_ANTIALIAS_SUBPIXEL);
+	cairo_set_font_options(cr, fopts);
+
+	for ( i=0; i<s->st->n_bgblocks; i++ ) {
+		render_bgblock(cr, s->st->bgblocks[i]);
+	}
+
+	for ( i=0; i<s->num_objects; i++ ) {
+
+		struct object *o = s->objects[i];
+
+		o->render_object(cr, o);
+
+	}
+
+	cairo_font_options_destroy(fopts);
+}
+
+static cairo_surface_t *render_slide(struct slide *s, int w, int h)
+{
+	cairo_surface_t *surf;
+	cairo_t *cr;
+
+	surf = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w, h);
+
+	cr = cairo_create(surf);
+	cairo_scale(cr, w/s->parent->slide_width, h/s->parent->slide_height);
+
+	render_slide_bits(s, cr);
+
+	cairo_destroy(cr);
+
+	return surf;
+}
+
+
+void redraw_slide(struct slide *s)
+{
+	int w, h;
+
+	if ( s->rendered_thumb != NULL ) {
+		cairo_surface_destroy(s->rendered_thumb);
+	}
+
+	w = s->parent->thumb_slide_width;
+	h = (s->parent->slide_height/s->parent->slide_width) * w;
+	s->rendered_thumb = render_slide(s, w, h);
+	/* FIXME: Request redraw for slide sorter if open */
+
+	/* Is this slide currently open in the editor? */
+	if ( s == s->parent->cur_edit_slide ) {
+
+		GtkWidget *da;
+
+		if ( s->rendered_edit != NULL ) {
+			cairo_surface_destroy(s->rendered_edit);
+		}
+
+		w = s->parent->edit_slide_width;
+		h = (s->parent->slide_height/s->parent->slide_width) * w;
+		s->rendered_edit = render_slide(s, w, h);
+
+		da = s->parent->drawingarea;
+		if ( da != NULL ) {
+			gdk_window_invalidate_rect(da->window, NULL, FALSE);
+		}
+
+	}
+
+	/* Is this slide currently being displayed on the projector? */
+	if ( s == s->parent->cur_proj_slide ) {
+
+		GtkWidget *da;
+
+		if ( s->rendered_proj != NULL ) {
+			cairo_surface_destroy(s->rendered_proj);
+		}
+
+		w = s->parent->proj_slide_width;
+		h = (s->parent->slide_height/s->parent->slide_width) * w;
+		s->rendered_proj = render_slide(s, w, h);
+
+		da = s->parent->ss_drawingarea;
+		if ( da != NULL ) {
+			gdk_window_invalidate_rect(da->window, NULL, FALSE);
+		}
+
+	}
+}
+
+
+void draw_rubberband_box(cairo_t *cr, double x, double y,
+                         double width, double height)
+{
+	cairo_new_path(cr);
+	cairo_rectangle(cr, x, y, width, height);
+	cairo_set_source_rgb(cr, 0.5, 0.5, 0.5);
+	cairo_set_line_width(cr, 0.5);
+	cairo_stroke(cr);
+}
+
+
+void draw_resize_handle(cairo_t *cr, double x, double y)
+{
+	cairo_new_path(cr);
+	cairo_rectangle(cr, x, y, 20.0, 20.0);
+	cairo_set_source_rgba(cr, 0.9, 0.9, 0.9, 0.5);
+	cairo_fill(cr);
+}
+
+
+void draw_editing_box(cairo_t *cr, double xmin, double ymin,
+                      double width, double height)
+{
+	const double dash[] = {2.0, 2.0};
+
+	cairo_new_path(cr);
+	cairo_rectangle(cr, xmin-5.0, ymin-5.0, width+10.0, height+10.0);
+	cairo_set_source_rgb(cr, 0.0, 0.69, 1.0);
+	cairo_set_line_width(cr, 0.5);
+	cairo_stroke(cr);
+
+	cairo_new_path(cr);
+	cairo_rectangle(cr, xmin, ymin, width, height);
+	cairo_set_dash(cr, dash, 2, 0.0);
+	cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
+	cairo_set_line_width(cr, 0.1);
+	cairo_stroke(cr);
+
+	cairo_set_dash(cr, NULL, 0, 0.0);
+}
+
+
+int export_pdf(struct presentation *p, const char *filename)
+{
+	int i;
+	cairo_surface_t *surf;
+	cairo_t *cr;
+
+	surf = cairo_pdf_surface_create(filename, p->slide_width,
+	                                          p->slide_height);
+
+	if ( cairo_surface_status(surf) != CAIRO_STATUS_SUCCESS ) {
+		fprintf(stderr, "Couldn't create Cairo surface\n");
+		return 1;
+	}
+
+	cr = cairo_create(surf);
+
+	for ( i=0; i<p->num_slides; i++ ) {
+		render_slide_bits(p->slides[i], cr);
+		cairo_surface_show_page(surf);
+	}
+
+	cairo_surface_finish(surf);
+	cairo_destroy(cr);
+
+	return 0;
+}