vcl/unx/gtk4/surfacepaintable.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9
  10 #include "surfacepaintable.hxx"
  11
  12 struct _SurfacePaintable
  13 {
  14     GObject parent_instance;
  15     int width;
  16     int height;
  17     cairo_surface_t* surface;
  18 };
  19
  20 namespace
  21 {
  22 struct _SurfacePaintableClass : public GObjectClass
  23 {
  24 };
  25 }
  26
  27 static void surface_paintable_snapshot(GdkPaintable* paintable, GdkSnapshot* snapshot, double width,
  28                                        double height)
  29 {
  30     graphene_rect_t rect
  31         = GRAPHENE_RECT_INIT(0.0f, 0.0f, static_cast<float>(width), static_cast<float>(height));
  32     SurfacePaintable* self = SURFACE_PAINTABLE(paintable);
  33     cairo_t* cr = gtk_snapshot_append_cairo(GTK_SNAPSHOT(snapshot), &rect);
  34     cairo_set_source_surface(cr, self->surface, 0, 0);
  35     cairo_paint(cr);
  36     cairo_destroy(cr);
  37 }
  38
  39 static GdkPaintableFlags surface_paintable_get_flags(GdkPaintable* /*paintable*/)
  40 {
  41     return static_cast<GdkPaintableFlags>(GDK_PAINTABLE_STATIC_SIZE
  42                                           | GDK_PAINTABLE_STATIC_CONTENTS);
  43 }
  44
  45 static int surface_paintable_get_intrinsic_width(GdkPaintable* paintable)
  46 {
  47     SurfacePaintable* self = SURFACE_PAINTABLE(paintable);
  48     return self->width;
  49 }
  50
  51 static int surface_paintable_get_intrinsic_height(GdkPaintable* paintable)
  52 {
  53     SurfacePaintable* self = SURFACE_PAINTABLE(paintable);
  54     return self->height;
  55 }
  56
  57 static void surface_paintable_init_interface(GdkPaintableInterface* iface)
  58 {
  59     iface->snapshot = surface_paintable_snapshot;
  60     iface->get_flags = surface_paintable_get_flags;
  61     iface->get_intrinsic_width = surface_paintable_get_intrinsic_width;
  62     iface->get_intrinsic_height = surface_paintable_get_intrinsic_height;
  63 }
  64
  65 G_DEFINE_TYPE_WITH_CODE(SurfacePaintable, surface_paintable, G_TYPE_OBJECT,
  66                         G_IMPLEMENT_INTERFACE(GDK_TYPE_PAINTABLE,
  67                                               surface_paintable_init_interface));
  68
  69 static void surface_paintable_init(SurfacePaintable* self)
  70 {
  71     self->width = 0;
  72     self->height = 0;
  73     self->surface = nullptr;
  74
  75     // prevent loplugin:unreffun firing on macro generated function
  76     (void)surface_paintable_get_instance_private(self);
  77 }
  78
  79 static void surface_paintable_dispose(GObject* object)
  80 {
  81     SurfacePaintable* self = SURFACE_PAINTABLE(object);
  82     cairo_surface_destroy(self->surface);
  83     G_OBJECT_CLASS(surface_paintable_parent_class)->dispose(object);
  84 }
  85
  86 static void surface_paintable_class_init(SurfacePaintableClass* klass)
  87 {
  88     GObjectClass* object_class = G_OBJECT_CLASS(klass);
  89     object_class->dispose = surface_paintable_dispose;
  90 }
  91
  92 void surface_paintable_set_source(SurfacePaintable* pPaintable, cairo_surface_t* pSource,
  93                                   int nWidth, int nHeight)
  94 {
  95     pPaintable->surface = pSource;
  96     pPaintable->width = nWidth;
  97     pPaintable->height = nHeight;
  98 }
  99
 100 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */