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/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 2017 Olaf Wintermann. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <stdio.h> #include <stdlib.h> #include "container.h" #include "draw_cairo.h" #ifdef UI_GTK3 gboolean ui_drawingarea_expose(GtkWidget *w, cairo_t *cr, void *data) { UiCairoGraphics g; g.g.width = gtk_widget_get_allocated_width(w); g.g.height = gtk_widget_get_allocated_height(w); g.widget = w; g.cr = cr; UiDrawEvent *event = data; UiEvent ev; ev.obj = event->obj; ev.window = event->obj->window; ev.document = event->obj->ctx->document; event->callback(&ev, &g.g, event->userdata); return FALSE; } #else gboolean ui_canvas_expose(GtkWidget *w, GdkEventExpose *e, void *data) { UiCairoGraphics g; g.g.width = w->allocation.width; g.g.height = w->allocation.height; g.widget = w; g.cr = gdk_cairo_create(w->window); UiDrawEvent *event = data; UiEvent ev; ev.obj = event->obj; ev.window = event->obj->window; ev.document = event->obj->ctx->document; event->callback(&ev, &g.g, event->userdata); return FALSE; } #endif // function from graphics.h void ui_connect_draw_handler(GtkWidget *widget, UiDrawEvent *event) { #ifdef UI_GTK3 g_signal_connect(G_OBJECT(widget), "draw", G_CALLBACK(ui_drawingarea_expose), event); #else g_signal_connect(G_OBJECT(widget), "expose_event", G_CALLBACK(ui_canvas_expose), event); #endif } PangoContext *ui_get_pango_context(UiGraphics *g) { UiCairoGraphics *gr = (UiCairoGraphics*)g; //return gtk_widget_get_pango_context(gr->widget); return pango_cairo_create_context(gr->cr); } // drawing functions void ui_graphics_color(UiGraphics *g, int red, int green, int blue) { UiCairoGraphics *gr = (UiCairoGraphics*)g; double dred = (double)red / (double)255; double dgreen = (double)green / (double)255; double dblue = (double)blue / (double)255; cairo_set_source_rgb(gr->cr, dred, dgreen, dblue); } void ui_draw_line(UiGraphics *g, int x1, int y1, int x2, int y2) { UiCairoGraphics *gr = (UiCairoGraphics*)g; cairo_set_line_width(gr->cr, 1); cairo_move_to(gr->cr, (double)x1 + 0.5, (double)y1 + 0.5); cairo_line_to(gr->cr, (double)x2 + 0.5, (double)y2 + 0.5); cairo_stroke(gr->cr); } void ui_draw_rect(UiGraphics *g, int x, int y, int w, int h, int fill) { UiCairoGraphics *gr = (UiCairoGraphics*)g; cairo_set_line_width(gr->cr, 1); cairo_rectangle(gr->cr, x + 0.5, y + 0.5 , w, h); if(fill) { cairo_fill(gr->cr); } else { cairo_stroke(gr->cr); } } void ui_draw_text(UiGraphics *g, int x, int y, UiTextLayout *text) { UiCairoGraphics *gr = (UiCairoGraphics*)g; cairo_move_to(gr->cr, x, y); pango_cairo_show_layout(gr->cr, text->layout); }