blob: b6c11bdd42fae8f68c8d8d2b7322293286ca7c3e [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "flutter/shell/platform/linux/fl_gl_area.h"
#include <epoxy/gl.h>
struct _FlGLArea {
GtkWidget parent_instance;
GdkGLContext* context;
GPtrArray* textures;
};
G_DEFINE_TYPE(FlGLArea, fl_gl_area, GTK_TYPE_WIDGET)
static void fl_gl_area_dispose(GObject* gobject) {
FlGLArea* self = FL_GL_AREA(gobject);
g_clear_object(&self->context);
g_clear_pointer(&self->textures, g_ptr_array_unref);
G_OBJECT_CLASS(fl_gl_area_parent_class)->dispose(gobject);
}
// Implements GtkWidget::realize.
static void fl_gl_area_realize(GtkWidget* widget) {
GtkAllocation allocation;
gtk_widget_get_allocation(widget, &allocation);
gtk_widget_set_realized(widget, TRUE);
GdkWindowAttr attributes;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.x = allocation.x;
attributes.y = allocation.y;
attributes.width = allocation.width;
attributes.height = allocation.height;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual(widget);
attributes.event_mask = gtk_widget_get_events(widget);
gint attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
GdkWindow* window = gdk_window_new(gtk_widget_get_parent_window(widget),
&attributes, attributes_mask);
gtk_widget_set_window(widget, window);
gtk_widget_register_window(widget, window);
}
// Implements GtkWidget::unrealize.
static void fl_gl_area_unrealize(GtkWidget* widget) {
FlGLArea* self = FL_GL_AREA(widget);
gdk_gl_context_make_current(self->context);
g_clear_pointer(&self->textures, g_ptr_array_unref);
/* Make sure to unset the context if current */
if (self->context == gdk_gl_context_get_current()) {
gdk_gl_context_clear_current();
}
GTK_WIDGET_CLASS(fl_gl_area_parent_class)->unrealize(widget);
}
// Implements GtkWidget::size_allocate.
static void fl_gl_area_size_allocate(GtkWidget* widget,
GtkAllocation* allocation) {
gtk_widget_set_allocation(widget, allocation);
if (gtk_widget_get_has_window(widget)) {
if (gtk_widget_get_realized(widget)) {
gdk_window_move_resize(gtk_widget_get_window(widget), allocation->x,
allocation->y, allocation->width,
allocation->height);
}
}
}
// Implements GtkWidget::draw.
static gboolean fl_gl_area_draw(GtkWidget* widget, cairo_t* cr) {
FlGLArea* self = FL_GL_AREA(widget);
gdk_gl_context_make_current(self->context);
gint scale = gtk_widget_get_scale_factor(widget);
if (self->textures == nullptr) {
return TRUE;
}
for (guint i = 0; i < self->textures->len; i++) {
FlBackingStoreProvider* texture =
FL_BACKING_STORE_PROVIDER(g_ptr_array_index(self->textures, i));
uint32_t texture_id = fl_backing_store_provider_get_gl_texture_id(texture);
GdkRectangle geometry = fl_backing_store_provider_get_geometry(texture);
gdk_cairo_draw_from_gl(cr, gtk_widget_get_window(widget), texture_id,
GL_TEXTURE, scale, geometry.x, geometry.y,
geometry.width, geometry.height);
}
return TRUE;
}
static void fl_gl_area_class_init(FlGLAreaClass* klass) {
GObjectClass* gobject_class = G_OBJECT_CLASS(klass);
gobject_class->dispose = fl_gl_area_dispose;
GtkWidgetClass* widget_class = GTK_WIDGET_CLASS(klass);
widget_class->realize = fl_gl_area_realize;
widget_class->unrealize = fl_gl_area_unrealize;
widget_class->size_allocate = fl_gl_area_size_allocate;
widget_class->draw = fl_gl_area_draw;
gtk_widget_class_set_accessible_role(widget_class, ATK_ROLE_DRAWING_AREA);
}
static void fl_gl_area_init(FlGLArea* self) {
gtk_widget_set_app_paintable(GTK_WIDGET(self), TRUE);
}
GtkWidget* fl_gl_area_new(GdkGLContext* context) {
g_return_val_if_fail(GDK_IS_GL_CONTEXT(context), nullptr);
FlGLArea* area =
reinterpret_cast<FlGLArea*>(g_object_new(fl_gl_area_get_type(), nullptr));
area->context = GDK_GL_CONTEXT(g_object_ref(context));
return GTK_WIDGET(area);
}
void fl_gl_area_queue_render(FlGLArea* self, GPtrArray* textures) {
g_return_if_fail(FL_IS_GL_AREA(self));
g_clear_pointer(&self->textures, g_ptr_array_unref);
self->textures = g_ptr_array_ref(textures);
gtk_widget_queue_draw(GTK_WIDGET(self));
}