comparison: ui/gtk/draw_cairo.c
ui/gtk/draw_cairo.c
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| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2017 Olaf Wintermann. All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include <stdio.h> | |
| 30 #include <stdlib.h> | |
| 31 | |
| 32 #include "container.h" | |
| 33 | |
| 34 #include "draw_cairo.h" | |
| 35 | |
| 36 #ifdef UI_GTK3 | |
| 37 gboolean ui_drawingarea_expose(GtkWidget *w, cairo_t *cr, void *data) { | |
| 38 UiCairoGraphics g; | |
| 39 g.g.width = gtk_widget_get_allocated_width(w); | |
| 40 g.g.height = gtk_widget_get_allocated_height(w); | |
| 41 g.widget = w; | |
| 42 g.cr = cr; | |
| 43 | |
| 44 UiDrawEvent *event = data; | |
| 45 UiEvent ev; | |
| 46 ev.obj = event->obj; | |
| 47 ev.window = event->obj->window; | |
| 48 ev.document = event->obj->ctx->document; | |
| 49 | |
| 50 event->callback(&ev, &g.g, event->userdata); | |
| 51 | |
| 52 return FALSE; | |
| 53 } | |
| 54 #else | |
| 55 gboolean ui_canvas_expose(GtkWidget *w, GdkEventExpose *e, void *data) { | |
| 56 UiCairoGraphics g; | |
| 57 g.g.width = w->allocation.width; | |
| 58 g.g.height = w->allocation.height; | |
| 59 g.widget = w; | |
| 60 g.cr = gdk_cairo_create(w->window); | |
| 61 | |
| 62 UiDrawEvent *event = data; | |
| 63 UiEvent ev; | |
| 64 ev.obj = event->obj; | |
| 65 ev.window = event->obj->window; | |
| 66 ev.document = event->obj->ctx->document; | |
| 67 | |
| 68 event->callback(&ev, &g.g, event->userdata); | |
| 69 | |
| 70 return FALSE; | |
| 71 } | |
| 72 #endif | |
| 73 | |
| 74 // function from graphics.h | |
| 75 | |
| 76 void ui_connect_draw_handler(GtkWidget *widget, UiDrawEvent *event) { | |
| 77 #ifdef UI_GTK3 | |
| 78 g_signal_connect(G_OBJECT(widget), | |
| 79 "draw", | |
| 80 G_CALLBACK(ui_drawingarea_expose), | |
| 81 event); | |
| 82 #else | |
| 83 g_signal_connect(G_OBJECT(widget), | |
| 84 "expose_event", | |
| 85 G_CALLBACK(ui_canvas_expose), | |
| 86 event); | |
| 87 #endif | |
| 88 } | |
| 89 | |
| 90 | |
| 91 PangoContext *ui_get_pango_context(UiGraphics *g) { | |
| 92 UiCairoGraphics *gr = (UiCairoGraphics*)g; | |
| 93 //return gtk_widget_get_pango_context(gr->widget); | |
| 94 return pango_cairo_create_context(gr->cr); | |
| 95 } | |
| 96 | |
| 97 | |
| 98 // drawing functions | |
| 99 void ui_graphics_color(UiGraphics *g, int red, int green, int blue) { | |
| 100 UiCairoGraphics *gr = (UiCairoGraphics*)g; | |
| 101 double dred = (double)red / (double)255; | |
| 102 double dgreen = (double)green / (double)255; | |
| 103 double dblue = (double)blue / (double)255; | |
| 104 cairo_set_source_rgb(gr->cr, dred, dgreen, dblue); | |
| 105 } | |
| 106 | |
| 107 | |
| 108 void ui_draw_line(UiGraphics *g, int x1, int y1, int x2, int y2) { | |
| 109 UiCairoGraphics *gr = (UiCairoGraphics*)g; | |
| 110 cairo_set_line_width(gr->cr, 1); | |
| 111 cairo_move_to(gr->cr, (double)x1 + 0.5, (double)y1 + 0.5); | |
| 112 cairo_line_to(gr->cr, (double)x2 + 0.5, (double)y2 + 0.5); | |
| 113 cairo_stroke(gr->cr); | |
| 114 } | |
| 115 | |
| 116 void ui_draw_rect(UiGraphics *g, int x, int y, int w, int h, int fill) { | |
| 117 UiCairoGraphics *gr = (UiCairoGraphics*)g; | |
| 118 cairo_set_line_width(gr->cr, 1); | |
| 119 cairo_rectangle(gr->cr, x + 0.5, y + 0.5 , w, h); | |
| 120 if(fill) { | |
| 121 cairo_fill(gr->cr); | |
| 122 } else { | |
| 123 cairo_stroke(gr->cr); | |
| 124 } | |
| 125 } | |
| 126 | |
| 127 void ui_draw_text(UiGraphics *g, int x, int y, UiTextLayout *text) { | |
| 128 UiCairoGraphics *gr = (UiCairoGraphics*)g; | |
| 129 cairo_move_to(gr->cr, x, y); | |
| 130 pango_cairo_show_layout(gr->cr, text->layout); | |
| 131 } | |
| 132 |
