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/*
* Copyright © 2016 Benjamin Otte
* Copyright © 2020 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include "gdkconfig.h"
#include <CoreGraphics/CoreGraphics.h>
#import "GdkMacosCairoView.h"
#include "gdkmacoscairocontext-private.h"
#include "gdkmacossurface-private.h"
struct _GdkMacosCairoContext
{
GdkCairoContext parent_instance;
cairo_surface_t *window_surface;
};
struct _GdkMacosCairoContextClass
{
GdkCairoContextClass parent_class;
};
G_DEFINE_TYPE (GdkMacosCairoContext, _gdk_macos_cairo_context, GDK_TYPE_CAIRO_CONTEXT)
static cairo_surface_t *
create_cairo_surface_for_surface (GdkSurface *surface)
{
cairo_surface_t *cairo_surface;
int scale;
int width;
int height;
g_assert (GDK_IS_MACOS_SURFACE (surface));
scale = gdk_surface_get_scale_factor (surface);
width = scale * gdk_surface_get_width (surface);
height = scale * gdk_surface_get_height (surface);
/* We use a cairo image surface here instead of a quartz surface because we
* get strange artifacts with the quartz surface such as empty cross-fades
* when hovering buttons. For performance, we want to be using GL rendering
* so there isn't much point here as correctness is better.
*/
cairo_surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
if (cairo_surface != NULL)
cairo_surface_set_device_scale (cairo_surface, scale, scale);
return cairo_surface;
}
static cairo_t *
_gdk_macos_cairo_context_cairo_create (GdkCairoContext *cairo_context)
{
GdkMacosCairoContext *self = (GdkMacosCairoContext *)cairo_context;
g_assert (GDK_IS_MACOS_CAIRO_CONTEXT (self));
return cairo_create (self->window_surface);
}
static void
_gdk_macos_cairo_context_begin_frame (GdkDrawContext *draw_context,
cairo_region_t *region)
{
GdkMacosCairoContext *self = (GdkMacosCairoContext *)draw_context;
GdkSurface *surface;
NSWindow *nswindow;
g_assert (GDK_IS_MACOS_CAIRO_CONTEXT (self));
surface = gdk_draw_context_get_surface (draw_context);
nswindow = _gdk_macos_surface_get_native (GDK_MACOS_SURFACE (surface));
if (self->window_surface == NULL)
{
self->window_surface = create_cairo_surface_for_surface (surface);
}
else
{
if (![nswindow isOpaque])
{
cairo_t *cr = cairo_create (self->window_surface);
gdk_cairo_region (cr, region);
cairo_set_source_rgba (cr, 0, 0, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_fill (cr);
cairo_destroy (cr);
}
}
}
static void
_gdk_macos_cairo_context_end_frame (GdkDrawContext *draw_context,
cairo_region_t *painted)
{
GdkMacosCairoContext *self = (GdkMacosCairoContext *)draw_context;
GdkSurface *surface;
NSView *nsview;
g_assert (GDK_IS_MACOS_CAIRO_CONTEXT (self));
g_assert (self->window_surface != NULL);
surface = gdk_draw_context_get_surface (draw_context);
nsview = _gdk_macos_surface_get_view (GDK_MACOS_SURFACE (surface));
if (GDK_IS_MACOS_CAIRO_VIEW (nsview))
[(GdkMacosCairoView *)nsview setCairoSurface:self->window_surface
withDamage:painted];
}
static void
_gdk_macos_cairo_context_surface_resized (GdkDrawContext *draw_context)
{
GdkMacosCairoContext *self = (GdkMacosCairoContext *)draw_context;
g_assert (GDK_IS_MACOS_CAIRO_CONTEXT (self));
g_clear_pointer (&self->window_surface, cairo_surface_destroy);
}
static void
_gdk_macos_cairo_context_class_init (GdkMacosCairoContextClass *klass)
{
GdkCairoContextClass *cairo_context_class = GDK_CAIRO_CONTEXT_CLASS (klass);
GdkDrawContextClass *draw_context_class = GDK_DRAW_CONTEXT_CLASS (klass);
draw_context_class->begin_frame = _gdk_macos_cairo_context_begin_frame;
draw_context_class->end_frame = _gdk_macos_cairo_context_end_frame;
draw_context_class->surface_resized = _gdk_macos_cairo_context_surface_resized;
cairo_context_class->cairo_create = _gdk_macos_cairo_context_cairo_create;
}
static void
_gdk_macos_cairo_context_init (GdkMacosCairoContext *self)
{
}
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