forked from AuroraMiddleware/gtk
235 lines
6.2 KiB
C
235 lines
6.2 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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* Copyright (C) 1998-2004 Tor Lillqvist
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* Copyright (C) 2001-2005 Hans Breuer
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include <math.h>
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#include <stdio.h>
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#include <glib.h>
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#include <pango/pangowin32.h>
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#include <cairo-win32.h>
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#include "gdkscreen.h" /* gdk_screen_get_default() */
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#include "gdkprivate-win32.h"
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#define ROP3_D 0x00AA0029
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#define ROP3_DSna 0x00220326
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#define ROP3_DSPDxax 0x00E20746
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#define LINE_ATTRIBUTES (GDK_GC_LINE_WIDTH|GDK_GC_LINE_STYLE| \
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GDK_GC_CAP_STYLE|GDK_GC_JOIN_STYLE)
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#define MUST_RENDER_DASHES_MANUALLY(gcwin32) \
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(gcwin32->line_style == GDK_LINE_DOUBLE_DASH || \
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(gcwin32->line_style == GDK_LINE_ON_OFF_DASH && gcwin32->pen_dash_offset))
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static cairo_surface_t *gdk_win32_ref_cairo_surface (GdkDrawable *drawable);
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static cairo_surface_t *gdk_win32_create_cairo_surface (GdkDrawable *drawable,
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int width,
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int height);
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static void gdk_drawable_impl_win32_finalize (GObject *object);
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static const cairo_user_data_key_t gdk_win32_cairo_key;
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G_DEFINE_TYPE (GdkDrawableImplWin32, _gdk_drawable_impl_win32, GDK_TYPE_DRAWABLE)
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static void
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_gdk_drawable_impl_win32_class_init (GdkDrawableImplWin32Class *klass)
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{
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GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass);
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = gdk_drawable_impl_win32_finalize;
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drawable_class->ref_cairo_surface = gdk_win32_ref_cairo_surface;
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drawable_class->create_cairo_surface = gdk_win32_create_cairo_surface;
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}
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static void
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_gdk_drawable_impl_win32_init (GdkDrawableImplWin32 *impl)
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{
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}
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static void
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gdk_drawable_impl_win32_finalize (GObject *object)
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{
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G_OBJECT_CLASS (_gdk_drawable_impl_win32_parent_class)->finalize (object);
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}
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/*****************************************************
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* Win32 specific implementations of generic functions *
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*****************************************************/
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/* Drawing
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*/
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/**
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* _gdk_win32_drawable_acquire_dc
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* @drawable: a Win32 #GdkDrawable implementation
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*
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* Gets a DC with the given drawable selected into
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* it.
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*
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* Return value: The DC, on success. Otherwise
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* %NULL. If this function succeeded
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* _gdk_win32_drawable_release_dc() must be called
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* release the DC when you are done using it.
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**/
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HDC
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_gdk_win32_drawable_acquire_dc (GdkDrawable *drawable)
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{
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GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
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if (GDK_IS_WINDOW_IMPL_WIN32 (drawable) &&
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GDK_WINDOW_DESTROYED (impl->wrapper))
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return NULL;
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if (!impl->hdc)
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{
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impl->hdc = GetDC (impl->handle);
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if (!impl->hdc)
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WIN32_GDI_FAILED ("GetDC");
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}
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if (impl->hdc)
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{
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impl->hdc_count++;
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return impl->hdc;
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}
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else
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{
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return NULL;
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}
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}
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/**
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* _gdk_win32_drawable_release_dc
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* @drawable: a Win32 #GdkDrawable implementation
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*
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* Releases the reference count for the DC
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* from _gdk_win32_drawable_acquire_dc()
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**/
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void
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_gdk_win32_drawable_release_dc (GdkDrawable *drawable)
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{
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GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
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g_return_if_fail (impl->hdc_count > 0);
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impl->hdc_count--;
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if (impl->hdc_count == 0)
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{
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if (impl->saved_dc_bitmap)
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{
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GDI_CALL (SelectObject, (impl->hdc, impl->saved_dc_bitmap));
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impl->saved_dc_bitmap = NULL;
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}
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if (impl->hdc)
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{
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GDI_CALL (ReleaseDC, (impl->handle, impl->hdc));
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impl->hdc = NULL;
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}
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}
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}
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static cairo_surface_t *
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gdk_win32_create_cairo_surface (GdkDrawable *drawable,
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gint width,
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gint height)
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{
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/* width and height are determined from the DC */
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return gdk_win32_ref_cairo_surface (drawable);
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}
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static void
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gdk_win32_cairo_surface_destroy (void *data)
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{
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GdkDrawableImplWin32 *impl = data;
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_gdk_win32_drawable_release_dc (GDK_DRAWABLE (impl));
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impl->cairo_surface = NULL;
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}
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static cairo_surface_t *
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gdk_win32_ref_cairo_surface (GdkDrawable *drawable)
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{
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GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
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if (GDK_IS_WINDOW_IMPL_WIN32 (drawable) &&
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GDK_WINDOW_DESTROYED (impl->wrapper))
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return NULL;
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if (!impl->cairo_surface)
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{
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HDC hdc = _gdk_win32_drawable_acquire_dc (drawable);
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if (!hdc)
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return NULL;
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impl->cairo_surface = cairo_win32_surface_create (hdc);
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cairo_surface_set_user_data (impl->cairo_surface, &gdk_win32_cairo_key,
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drawable, gdk_win32_cairo_surface_destroy);
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}
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else
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cairo_surface_reference (impl->cairo_surface);
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return impl->cairo_surface;
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}
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HGDIOBJ
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gdk_win32_drawable_get_handle (GdkDrawable *drawable)
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{
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return GDK_DRAWABLE_HANDLE (drawable);
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}
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/**
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* _gdk_win32_drawable_finish
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* @drawable: a Win32 #GdkDrawable implementation
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*
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* Releases any resources allocated internally for the drawable.
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* This is called when the drawable becomes unusable, i.e.
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* gdk_window_destroy() is called.
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**/
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void
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_gdk_win32_drawable_finish (GdkDrawable *drawable)
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{
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GdkDrawableImplWin32 *impl = GDK_DRAWABLE_IMPL_WIN32 (drawable);
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if (impl->cairo_surface)
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{
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cairo_surface_finish (impl->cairo_surface);
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cairo_surface_set_user_data (impl->cairo_surface, &gdk_win32_cairo_key, NULL, NULL);
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}
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g_assert (impl->hdc_count == 0);
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}
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