[retro-gtk/wip/aplazas/0.13] Port CairoDisplay to C
- From: Adrien Plazas <aplazas src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [retro-gtk/wip/aplazas/0.13] Port CairoDisplay to C
- Date: Thu, 7 Sep 2017 09:22:45 +0000 (UTC)
commit b9953cb8ad9d7da66bfb4ab54bef106cfe8529d3
Author: Adrien Plazas <kekun plazas laposte net>
Date: Wed Sep 6 14:21:14 2017 +0200
Port CairoDisplay to C
retro-gtk/Makefile.am | 3 +-
retro-gtk/retro-cairo-display-bak.c | 590 +++++++++++++++++++++++++++++++++++
retro-gtk/retro-cairo-display.c | 403 ++++++++++++++++++++++++
retro-gtk/retro-cairo-display.h | 37 +++
retro-gtk/retro-core-view.h | 3 +-
retro-gtk/retro-gtk.h | 1 +
retro-gtk/video/cairo-display.vala | 143 ---------
7 files changed, 1034 insertions(+), 146 deletions(-)
---
diff --git a/retro-gtk/Makefile.am b/retro-gtk/Makefile.am
index 6230ed5..6d4b6b0 100644
--- a/retro-gtk/Makefile.am
+++ b/retro-gtk/Makefile.am
@@ -43,6 +43,7 @@ libretro_gtk_la_SOURCES = \
core-error.vala \
memory.vala \
retro.vala \
+ retro-cairo-display.c \
retro-core-descriptor.vala \
retro-core-descriptor-error.vala \
retro-core-view.c \
@@ -61,7 +62,6 @@ libretro_gtk_la_SOURCES = \
retro-environment.c \
libretro-environment.h \
\
- video/cairo-display.vala \
video/retro-video-converter.c \
$(NULL)
@@ -107,6 +107,7 @@ retro_gtkincludedir = $(includedir)/retro-gtk-0.12
retro_gtkinclude_HEADERS = \
retro-analog-id.h \
retro-analog-index.h \
+ retro-cairo-display.h \
retro-core-view.h \
retro-device-type.h \
retro-gtk.h \
diff --git a/retro-gtk/retro-cairo-display-bak.c b/retro-gtk/retro-cairo-display-bak.c
new file mode 100644
index 0000000..b4c23c0
--- /dev/null
+++ b/retro-gtk/retro-cairo-display-bak.c
@@ -0,0 +1,590 @@
+// This file is part of retro-gtk. License: GPL-3.0+.
+
+#include "retro-cairo-display.h"
+
+/*
+ * Because gdk-pixbuf saves dpi as integer we have to multiply it by big enough
+ * number to represent aspect ratio precisely.
+ */
+#define RETRO_CAIRO_DISPLAY_Y_DPI (1000000.0f)
+
+struct _RetroCairoDisplay
+{
+ GtkDrawingArea parent_instance;
+ RetroCore *core;
+ GdkPixbuf *pixbuf;
+ RetroVideoFilter filter;
+ gfloat aspect_ratio;
+ gboolean show_surface;
+ gulong on_video_output_id;
+};
+
+G_DEFINE_TYPE (RetroCairoDisplay, retro_cairo_display, GTK_TYPE_DRAWING_AREA)
+
+enum {
+ PROP_PIXBUF,
+ N_PROPS,
+};
+
+static GParamSpec *properties [N_PROPS];
+
+static void
+retro_cairo_display_finalize (GObject *object)
+{
+ RetroCairoDisplay *self = (RetroCairoDisplay *)object;
+
+ if (self->core != NULL)
+ g_object_unref (self->core);
+ if (self->pixbuf != NULL)
+ g_object_unref (self->pixbuf);
+
+ G_OBJECT_CLASS (retro_cairo_display_parent_class)->finalize (object);
+}
+
+static void
+retro_cairo_display_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ RetroCairoDisplay *self = RETRO_CAIRO_DISPLAY (object);
+
+ switch (prop_id) {
+ case PROP_PIXBUF:
+ g_value_set_object (value, retro_cairo_display_get_pixbuf (self));
+
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+
+ break;
+ }
+}
+
+static void
+retro_cairo_display_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ RetroCairoDisplay *self = RETRO_CAIRO_DISPLAY (object);
+
+ switch (prop_id) {
+ case PROP_PIXBUF:
+ retro_cairo_display_set_pixbuf (self, g_value_get_object (value));
+
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+
+ break;
+ }
+}
+
+static void
+retro_cairo_display_class_init (RetroCairoDisplayClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ ((GtkWidgetClass *) klass)->draw = (gboolean (*) (GtkWidget *, cairo_t *)) retro_cairo_display_real_draw;
+
+ object_class->finalize = retro_cairo_display_finalize;
+ object_class->get_property = retro_cairo_display_get_property;
+ object_class->set_property = retro_cairo_display_set_property;
+
+ properties[PROP_PIXBUF] =
+ g_param_spec_object ("pixbuf",
+ "pixbuf",
+ "pixbuf",
+ gdk_pixbuf_get_type (),
+ G_PARAM_READWRITE | G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB);
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PIXBUF, properties[PROP_PIXBUF]);
+}
+
+static void
+retro_cairo_display_init (RetroCairoDisplay *self)
+{
+ self->filter = RETRO_VIDEO_FILTER_SMOOTH;
+ self->show_surface = TRUE;
+ g_signal_connect_object (G_OBJECT (self),
+ "notify::sensitive",
+ (GCallback) _gtk_widget_queue_draw_g_object_notify,
+ GTK_WIDGET (self),
+ 0);
+ g_signal_connect_object (G_OBJECT (self),
+ "notify::pixbuf",
+ (GCallback) _gtk_widget_queue_draw_g_object_notify,
+ GTK_WIDGET (self),
+ 0);
+}
+
+GdkPixbuf *
+retro_cairo_display_get_pixbuf (RetroCairoDisplay *self)
+{
+ g_return_val_if_fail (self != NULL, NULL);
+
+ return self->pixbuf;
+}
+
+void
+retro_cairo_display_set_pixbuf (RetroCairoDisplay *self,
+ GdkPixbuf *pixbuf)
+{
+ g_return_if_fail (self != NULL);
+
+ if (self->pixbuf == pixbuf)
+ return;
+
+ g_clear_object (&self->pixbuf);
+
+ if (pixbuf != NULL)
+ self->pixbuf = g_object_ref (pixbuf);
+
+ g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_PIXBUF]);
+}
+
+void
+retro_cairo_display_set_core (RetroCairoDisplay *self,
+ RetroCore *core)
+{
+ RetroCore* _tmp0_;
+ RetroCore* _tmp3_;
+ RetroCore* _tmp4_;
+ RetroCore* _tmp5_;
+ g_return_if_fail (self != NULL);
+ _tmp0_ = self->core;
+ if (_tmp0_ != NULL) {
+ RetroCore* _tmp1_;
+ gulong _tmp2_;
+ _tmp1_ = self->core;
+ _tmp2_ = self->on_video_output_id;
+ g_signal_handler_disconnect ((GObject*) _tmp1_, _tmp2_);
+ }
+ _tmp3_ = core;
+ _tmp4_ = _g_object_ref0 (_tmp3_);
+ _g_object_unref0 (self->core);
+ self->core = _tmp4_;
+ _tmp5_ = self->core;
+ if (_tmp5_ != NULL) {
+ RetroCore* _tmp6_;
+ gulong _tmp7_;
+ _tmp6_ = core;
+ _tmp7_ = g_signal_connect_object (_tmp6_, "video-output", (GCallback)
_retro_cairo_display_on_video_output_retro_core_video_output, self, 0);
+ self->on_video_output_id = _tmp7_;
+ }
+}
+
+void
+retro_cairo_display_set_filter (RetroCairoDisplay *self,
+ RetroVideoFilter filter)
+{
+ RetroVideoFilter _tmp0_;
+ g_return_if_fail (self != NULL);
+ _tmp0_ = filter;
+ self->filter = _tmp0_;
+ gtk_widget_queue_draw ((GtkWidget*) self);
+}
+
+gboolean
+retro_cairo_display_get_coordinates_on_display (RetroCairoDisplay *self,
+ gdouble widget_x,
+ gdouble widget_y,
+ gdouble *display_x,
+ gdouble *display_y)
+{
+ gdouble _vala_display_x = 0.0;
+ gdouble _vala_display_y = 0.0;
+ gboolean result = FALSE;
+ gdouble w = 0.0;
+ gdouble h = 0.0;
+ gdouble x = 0.0;
+ gdouble y = 0.0;
+ gdouble _tmp0_ = 0.0;
+ gdouble _tmp1_ = 0.0;
+ gdouble _tmp2_ = 0.0;
+ gdouble _tmp3_ = 0.0;
+ gdouble _tmp4_;
+ gdouble _tmp5_;
+ gdouble _tmp6_;
+ gdouble _tmp7_;
+ gdouble _tmp8_;
+ gdouble _tmp9_;
+ gdouble _tmp10_;
+ gdouble _tmp11_;
+ gboolean _tmp12_ = FALSE;
+ gdouble _tmp13_;
+ gdouble _tmp14_;
+ g_return_val_if_fail (self != NULL, FALSE);
+ retro_cairo_display_get_video_box (self, &_tmp0_, &_tmp1_, &_tmp2_, &_tmp3_);
+ w = _tmp0_;
+ h = _tmp1_;
+ x = _tmp2_;
+ y = _tmp3_;
+ _tmp4_ = widget_x;
+ _tmp5_ = x;
+ _tmp6_ = w;
+ _tmp7_ = w;
+ _vala_display_x = (((_tmp4_ - _tmp5_) * 2.0) - _tmp6_) / _tmp7_;
+ _tmp8_ = widget_y;
+ _tmp9_ = y;
+ _tmp10_ = h;
+ _tmp11_ = h;
+ _vala_display_y = (((_tmp8_ - _tmp9_) * 2.0) - _tmp10_) / _tmp11_;
+ _tmp13_ = _vala_display_x;
+ _tmp14_ = _tmp13_;
+ if (((-1.0) <= _tmp14_) && (_tmp14_ <= 1.0)) {
+ gdouble _tmp15_;
+ gdouble _tmp16_;
+ _tmp15_ = _vala_display_y;
+ _tmp16_ = _tmp15_;
+ _tmp12_ = ((-1.0) <= _tmp16_) && (_tmp16_ <= 1.0);
+ } else {
+ _tmp12_ = FALSE;
+ }
+ result = _tmp12_;
+ if (display_x) {
+ *display_x = _vala_display_x;
+ }
+ if (display_y) {
+ *display_y = _vala_display_y;
+ }
+ return result;
+}
+
+void
+retro_cairo_display_show_video (RetroCairoDisplay *self)
+{
+ g_return_if_fail (self != NULL);
+ self->show_surface = TRUE;
+ gtk_widget_queue_draw ((GtkWidget*) self);
+}
+
+void
+retro_cairo_display_hide_video (RetroCairoDisplay *self)
+{
+ g_return_if_fail (self != NULL);
+ self->show_surface = FALSE;
+ gtk_widget_queue_draw ((GtkWidget*) self);
+}
+
+RetroCairoDisplay *
+retro_cairo_display_new (void)
+{
+ return g_object_new (RETRO_TYPE_CAIRO_DISPLAY, NULL);
+}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+#include <glib.h>
+#include <glib-object.h>
+#include <gtk/gtk.h>
+#include <gdk-pixbuf/gdk-pixbuf.h>
+#include <retro-video-filter.h>
+#include <float.h>
+#include <math.h>
+#include <cairo.h>
+#include <retro-pixel-format.h>
+#include <stdlib.h>
+#include <string.h>
+#include <gdk/gdk.h>
+
+static void _retro_cairo_display_on_video_output_retro_core_video_output (RetroCore* _sender, guint8* data,
int data_length1, guint width, guint height, gsize pitch, RetroPixelFormat pixel_format, gfloat aspect_ratio,
gpointer self) {
+ retro_cairo_display_on_video_output ((RetroCairoDisplay*) self, data, data_length1, width, height, pitch,
pixel_format, aspect_ratio);
+}
+
+static void retro_cairo_display_on_video_output (RetroCairoDisplay* self, guint8* data, int data_length1,
guint width, guint height, gsize pitch, RetroPixelFormat pixel_format, gfloat aspect_ratio) {
+ gfloat _tmp0_;
+ guint8* _tmp1_;
+ gint _tmp1__length1;
+ guint _tmp2_;
+ guint _tmp3_;
+ gsize _tmp4_;
+ RetroPixelFormat _tmp5_;
+ GdkPixbuf* _tmp6_;
+ GdkPixbuf* _tmp7_;
+ gfloat x_dpi = 0.0F;
+ gfloat _tmp8_;
+ gchar* x_dpi_string = NULL;
+ gchar* _tmp9_;
+ gchar* y_dpi_string = NULL;
+ gchar* _tmp10_;
+ GdkPixbuf* _tmp11_;
+ GdkPixbuf* _tmp12_;
+ g_return_if_fail (self != NULL);
+ _tmp0_ = aspect_ratio;
+ self->aspect_ratio = _tmp0_;
+ _tmp1_ = data;
+ _tmp1__length1 = data_length1;
+ _tmp2_ = width;
+ _tmp3_ = height;
+ _tmp4_ = pitch;
+ _tmp5_ = pixel_format;
+ _tmp6_ = gdk_pixbuf_new_from_video (_tmp1_, _tmp2_, _tmp3_, _tmp4_, _tmp5_);
+ _tmp7_ = _tmp6_;
+ retro_cairo_display_set_pixbuf (self, _tmp7_);
+ _g_object_unref0 (_tmp7_);
+ _tmp8_ = aspect_ratio;
+ x_dpi = _tmp8_ * RETRO_CAIRO_DISPLAY_Y_DPI;
+ _tmp9_ = g_strdup_printf ("%g", x_dpi);
+ x_dpi_string = _tmp9_;
+ _tmp10_ = g_strdup_printf ("%g", RETRO_CAIRO_DISPLAY_Y_DPI);
+ y_dpi_string = _tmp10_;
+ _tmp11_ = self->pixbuf;
+ gdk_pixbuf_set_option (_tmp11_, "x-dpi", x_dpi_string);
+ _tmp12_ = self->pixbuf;
+ gdk_pixbuf_set_option (_tmp12_, "y-dpi", y_dpi_string);
+ _g_free0 (y_dpi_string);
+ _g_free0 (x_dpi_string);
+}
+
+static gpointer _cairo_pattern_reference0 (gpointer self) {
+ return self ? cairo_pattern_reference (self) : NULL;
+}
+
+static gboolean retro_cairo_display_real_draw (GtkWidget* base, cairo_t* cr) {
+ RetroCairoDisplay * self;
+ gboolean result = FALSE;
+ cairo_t* _tmp0_;
+ gboolean _tmp1_;
+ GdkPixbuf* to_draw = NULL;
+ GdkPixbuf* _tmp2_;
+ GdkPixbuf* _tmp3_;
+ GdkPixbuf* _tmp4_;
+ gboolean _tmp5_;
+ gboolean _tmp6_;
+ cairo_surface_t* surface = NULL;
+ GdkPixbuf* _tmp21_;
+ cairo_surface_t* _tmp22_;
+ gdouble w = 0.0;
+ gdouble h = 0.0;
+ gdouble x = 0.0;
+ gdouble y = 0.0;
+ gdouble _tmp23_ = 0.0;
+ gdouble _tmp24_ = 0.0;
+ gdouble _tmp25_ = 0.0;
+ gdouble _tmp26_ = 0.0;
+ gdouble xs = 0.0;
+ gdouble _tmp27_;
+ GdkPixbuf* _tmp28_;
+ gint _tmp29_;
+ gint _tmp30_;
+ gdouble ys = 0.0;
+ gdouble _tmp31_;
+ GdkPixbuf* _tmp32_;
+ gint _tmp33_;
+ gint _tmp34_;
+ cairo_t* _tmp35_;
+ gdouble _tmp36_;
+ gdouble _tmp37_;
+ cairo_t* _tmp38_;
+ cairo_surface_t* _tmp39_;
+ gdouble _tmp40_;
+ gdouble _tmp41_;
+ gdouble _tmp42_;
+ gdouble _tmp43_;
+ cairo_pattern_t* source = NULL;
+ cairo_t* _tmp44_;
+ cairo_pattern_t* _tmp45_;
+ cairo_pattern_t* _tmp46_;
+ RetroVideoFilter _tmp47_;
+ cairo_t* _tmp50_;
+ self = (RetroCairoDisplay*) base;
+ g_return_val_if_fail (cr != NULL, FALSE);
+ _tmp0_ = cr;
+ retro_cairo_display_draw_background (self, _tmp0_);
+ _tmp1_ = self->show_surface;
+ if (!_tmp1_) {
+ result = FALSE;
+ return result;
+ }
+ _tmp2_ = self->pixbuf;
+ _tmp3_ = _g_object_ref0 (_tmp2_);
+ to_draw = _tmp3_;
+ _tmp4_ = to_draw;
+ if (_tmp4_ == NULL) {
+ result = FALSE;
+ _g_object_unref0 (to_draw);
+ return result;
+ }
+ _tmp5_ = gtk_widget_get_sensitive ((GtkWidget*) self);
+ _tmp6_ = _tmp5_;
+ if (!_tmp6_) {
+ GdkPixbuf* desaturated = NULL;
+ GdkPixbuf* _tmp7_;
+ gboolean _tmp8_;
+ gboolean _tmp9_;
+ GdkPixbuf* _tmp10_;
+ gint _tmp11_;
+ gint _tmp12_;
+ GdkPixbuf* _tmp13_;
+ gint _tmp14_;
+ gint _tmp15_;
+ GdkPixbuf* _tmp16_;
+ GdkPixbuf* _tmp17_;
+ GdkPixbuf* _tmp18_;
+ GdkPixbuf* _tmp19_;
+ GdkPixbuf* _tmp20_;
+ _tmp7_ = to_draw;
+ _tmp8_ = gdk_pixbuf_get_has_alpha (_tmp7_);
+ _tmp9_ = _tmp8_;
+ _tmp10_ = to_draw;
+ _tmp11_ = gdk_pixbuf_get_width (_tmp10_);
+ _tmp12_ = _tmp11_;
+ _tmp13_ = to_draw;
+ _tmp14_ = gdk_pixbuf_get_height (_tmp13_);
+ _tmp15_ = _tmp14_;
+ _tmp16_ = gdk_pixbuf_new (GDK_COLORSPACE_RGB, _tmp9_, 8, _tmp12_, _tmp15_);
+ desaturated = _tmp16_;
+ _tmp17_ = to_draw;
+ _tmp18_ = desaturated;
+ gdk_pixbuf_saturate_and_pixelate (_tmp17_, _tmp18_, 0.0f, FALSE);
+ _tmp19_ = desaturated;
+ _tmp20_ = _g_object_ref0 (_tmp19_);
+ _g_object_unref0 (to_draw);
+ to_draw = _tmp20_;
+ _g_object_unref0 (desaturated);
+ }
+ _tmp21_ = to_draw;
+ _tmp22_ = gdk_cairo_surface_create_from_pixbuf (_tmp21_, 1, NULL);
+ surface = _tmp22_;
+ retro_cairo_display_get_video_box (self, &_tmp23_, &_tmp24_, &_tmp25_, &_tmp26_);
+ w = _tmp23_;
+ h = _tmp24_;
+ x = _tmp25_;
+ y = _tmp26_;
+ _tmp27_ = w;
+ _tmp28_ = to_draw;
+ _tmp29_ = gdk_pixbuf_get_width (_tmp28_);
+ _tmp30_ = _tmp29_;
+ xs = _tmp27_ / _tmp30_;
+ _tmp31_ = h;
+ _tmp32_ = to_draw;
+ _tmp33_ = gdk_pixbuf_get_height (_tmp32_);
+ _tmp34_ = _tmp33_;
+ ys = _tmp31_ / _tmp34_;
+ _tmp35_ = cr;
+ _tmp36_ = xs;
+ _tmp37_ = ys;
+ cairo_scale (_tmp35_, _tmp36_, _tmp37_);
+ _tmp38_ = cr;
+ _tmp39_ = surface;
+ _tmp40_ = x;
+ _tmp41_ = xs;
+ _tmp42_ = y;
+ _tmp43_ = ys;
+ cairo_set_source_surface (_tmp38_, _tmp39_, _tmp40_ / _tmp41_, _tmp42_ / _tmp43_);
+ _tmp44_ = cr;
+ _tmp45_ = cairo_get_source (_tmp44_);
+ _tmp46_ = _cairo_pattern_reference0 (_tmp45_);
+ source = _tmp46_;
+ _tmp47_ = self->filter;
+ switch (_tmp47_) {
+ case RETRO_VIDEO_FILTER_SHARP:
+ {
+ cairo_pattern_t* _tmp48_;
+ _tmp48_ = source;
+ cairo_pattern_set_filter (_tmp48_, CAIRO_FILTER_NEAREST);
+ break;
+ }
+ default:
+ case RETRO_VIDEO_FILTER_SMOOTH:
+ {
+ cairo_pattern_t* _tmp49_;
+ _tmp49_ = source;
+ cairo_pattern_set_filter (_tmp49_, CAIRO_FILTER_BILINEAR);
+ break;
+ }
+ }
+ _tmp50_ = cr;
+ cairo_paint (_tmp50_);
+ result = TRUE;
+ _cairo_pattern_destroy0 (source);
+ _cairo_surface_destroy0 (surface);
+ _g_object_unref0 (to_draw);
+ return result;
+}
+
+static void retro_cairo_display_draw_background (RetroCairoDisplay* self, cairo_t* cr) {
+ cairo_t* _tmp0_;
+ cairo_t* _tmp1_;
+ g_return_if_fail (self != NULL);
+ g_return_if_fail (cr != NULL);
+ _tmp0_ = cr;
+ cairo_set_source_rgb (_tmp0_, (gdouble) 0, (gdouble) 0, (gdouble) 0);
+ _tmp1_ = cr;
+ cairo_paint (_tmp1_);
+}
+
+static void retro_cairo_display_get_video_box (RetroCairoDisplay *self,
+ gdouble *width,
+ gdouble *height,
+ gdouble *x,
+ gdouble *y)
+{
+ gdouble _vala_width = 0.0;
+ gdouble _vala_height = 0.0;
+ gdouble _vala_x = 0.0;
+ gdouble _vala_y = 0.0;
+ gdouble w = 0.0;
+ gdouble h = 0.0;
+ gdouble display_ratio = 0.0;
+ gdouble allocated_ratio = 0.0;
+ gdouble _tmp13_;
+ gdouble _tmp14_;
+ gdouble _tmp15_;
+ gdouble _tmp16_;
+
+ g_return_if_fail (self != NULL);
+ g_return_if_fail (width != NULL);
+ g_return_if_fail (height != NULL);
+ g_return_if_fail (x != NULL);
+ g_return_if_fail (y != NULL);
+
+ w = (gdouble) gtk_widget_get_allocated_width (GTK_WIDGET (self));
+ h = (gdouble) gtk_widget_get_allocated_height (GTK_WIDGET (self));
+
+ // Set the size of the display.
+ display_ratio = (gdouble) self->aspect_ratio;
+ allocated_ratio = w / h;
+
+ // If the screen is wider than the video…
+ if (allocated_ratio > display_ratio) {
+ *height = h;
+ *width = (gdouble) (h * display_ratio);
+ }
+ else {
+ *width = w;
+ *height = (gdouble) (w / display_ratio);
+ }
+
+ // Set the position of the display.
+ *x = (w - *width) / 2;
+ *y = (h - *height) / 2;
+}
+
+static void _gtk_widget_queue_draw_g_object_notify (GObject* _sender, GParamSpec* pspec, gpointer self) {
+ gtk_widget_queue_draw ((GtkWidget*) self);
+}
+
diff --git a/retro-gtk/retro-cairo-display.c b/retro-gtk/retro-cairo-display.c
new file mode 100644
index 0000000..fe14269
--- /dev/null
+++ b/retro-gtk/retro-cairo-display.c
@@ -0,0 +1,403 @@
+// This file is part of retro-gtk. License: GPL-3.0+.
+
+#include "retro-cairo-display.h"
+
+#include "retro-pixel-format.h"
+
+// FIXME Remove as soon as possible.
+GdkPixbuf *
+gdk_pixbuf_new_from_video (gconstpointer src,
+ guint width,
+ guint height,
+ gsize pitch,
+ gint pixel_format);
+
+/*
+ * Because gdk-pixbuf saves dpi as integer we have to multiply it by big enough
+ * number to represent aspect ratio precisely.
+ */
+#define RETRO_CAIRO_DISPLAY_Y_DPI (1000000.0f)
+
+struct _RetroCairoDisplay
+{
+ GtkDrawingArea parent_instance;
+ RetroCore *core;
+ GdkPixbuf *pixbuf;
+ RetroVideoFilter filter;
+ gfloat aspect_ratio;
+ gboolean show_surface;
+ gulong on_video_output_id;
+};
+
+G_DEFINE_TYPE (RetroCairoDisplay, retro_cairo_display, GTK_TYPE_DRAWING_AREA)
+
+enum {
+ PROP_PIXBUF = 1,
+ N_PROPS,
+};
+
+static GParamSpec *properties [N_PROPS];
+
+/* Private */
+
+static void
+retro_cairo_display_get_video_box (RetroCairoDisplay *self,
+ gdouble *width,
+ gdouble *height,
+ gdouble *x,
+ gdouble *y)
+{
+ gdouble w;
+ gdouble h;
+ gdouble display_ratio;
+ gdouble allocated_ratio;
+
+ g_return_if_fail (self != NULL);
+ g_return_if_fail (width != NULL);
+ g_return_if_fail (height != NULL);
+ g_return_if_fail (x != NULL);
+ g_return_if_fail (y != NULL);
+
+ w = (gdouble) gtk_widget_get_allocated_width (GTK_WIDGET (self));
+ h = (gdouble) gtk_widget_get_allocated_height (GTK_WIDGET (self));
+
+ // Set the size of the display.
+ display_ratio = (gdouble) self->aspect_ratio;
+ allocated_ratio = w / h;
+
+ // If the screen is wider than the video…
+ if (allocated_ratio > display_ratio) {
+ *height = h;
+ *width = (gdouble) (h * display_ratio);
+ }
+ else {
+ *width = w;
+ *height = (gdouble) (w / display_ratio);
+ }
+
+ // Set the position of the display.
+ *x = (w - *width) / 2;
+ *y = (h - *height) / 2;
+}
+
+static void
+retro_cairo_display_draw_background (RetroCairoDisplay *self,
+ cairo_t *cr)
+{
+ g_return_if_fail (self != NULL);
+ g_return_if_fail (cr != NULL);
+
+ cairo_set_source_rgb (cr, (gdouble) 0, (gdouble) 0, (gdouble) 0);
+ cairo_paint (cr);
+}
+
+static gboolean
+retro_cairo_display_real_draw (GtkWidget *base,
+ cairo_t *cr)
+{
+ RetroCairoDisplay *self = RETRO_CAIRO_DISPLAY (base);
+ GdkPixbuf *to_draw;
+ gboolean has_alpha;
+ gint width;
+ gint height;
+
+ cairo_surface_t *surface;
+ gdouble w = 0.0;
+ gdouble h = 0.0;
+ gdouble x = 0.0;
+ gdouble y = 0.0;
+ gdouble xs;
+ gdouble ys;
+ cairo_pattern_t *source;
+
+ g_return_val_if_fail (self != NULL, FALSE);
+ g_return_val_if_fail (cr != NULL, FALSE);
+
+ retro_cairo_display_draw_background (self, cr);
+
+ if (!self->show_surface)
+ return FALSE;
+
+ if (self->pixbuf == NULL)
+ return FALSE;
+
+ if (gtk_widget_get_sensitive (GTK_WIDGET (self)))
+ to_draw = g_object_ref (self->pixbuf);
+ else {
+ has_alpha = gdk_pixbuf_get_has_alpha (self->pixbuf);
+ width = gdk_pixbuf_get_width (self->pixbuf);
+ height = gdk_pixbuf_get_height (self->pixbuf);
+ to_draw = gdk_pixbuf_new (GDK_COLORSPACE_RGB, has_alpha, 8, width, height);
+ gdk_pixbuf_saturate_and_pixelate (self->pixbuf, to_draw, 0.0f, FALSE);
+ }
+
+ surface = gdk_cairo_surface_create_from_pixbuf (to_draw, 1, NULL);
+ retro_cairo_display_get_video_box (self, &w, &h, &x, &y);
+ xs = w / gdk_pixbuf_get_width (to_draw);
+ ys = h / gdk_pixbuf_get_height (to_draw);
+
+ cairo_scale (cr, xs, ys);
+ cairo_set_source_surface (cr, surface, x / xs, y / ys);
+ source = cairo_get_source (cr);
+ switch (self->filter) {
+ case RETRO_VIDEO_FILTER_SHARP:
+ cairo_pattern_set_filter (source, CAIRO_FILTER_NEAREST);
+
+ break;
+ default:
+ case RETRO_VIDEO_FILTER_SMOOTH:
+ cairo_pattern_set_filter (source, CAIRO_FILTER_BILINEAR);
+
+ break;
+ }
+ cairo_paint (cr);
+
+ cairo_surface_destroy (surface);
+ g_object_unref (to_draw);
+
+ return TRUE;
+}
+static void
+retro_cairo_display_finalize (GObject *object)
+{
+ RetroCairoDisplay *self = (RetroCairoDisplay *) object;
+
+ if (self->core != NULL)
+ g_object_unref (self->core);
+ if (self->pixbuf != NULL)
+ g_object_unref (self->pixbuf);
+
+ G_OBJECT_CLASS (retro_cairo_display_parent_class)->finalize (object);
+}
+
+static void
+retro_cairo_display_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ RetroCairoDisplay *self = RETRO_CAIRO_DISPLAY (object);
+
+ switch (prop_id) {
+ case PROP_PIXBUF:
+ g_value_set_object (value, retro_cairo_display_get_pixbuf (self));
+
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+
+ break;
+ }
+}
+
+static void
+retro_cairo_display_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ RetroCairoDisplay *self = RETRO_CAIRO_DISPLAY (object);
+
+ switch (prop_id) {
+ case PROP_PIXBUF:
+ retro_cairo_display_set_pixbuf (self, g_value_get_object (value));
+
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+
+ break;
+ }
+}
+
+static void
+retro_cairo_display_class_init (RetroCairoDisplayClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ ((GtkWidgetClass *) klass)->draw = (gboolean (*) (GtkWidget *, cairo_t *)) retro_cairo_display_real_draw;
+
+ object_class->finalize = retro_cairo_display_finalize;
+ object_class->get_property = retro_cairo_display_get_property;
+ object_class->set_property = retro_cairo_display_set_property;
+
+ properties[PROP_PIXBUF] =
+ g_param_spec_object ("pixbuf",
+ "Pixbuf",
+ "The displayed pixbuf",
+ gdk_pixbuf_get_type (),
+ G_PARAM_READWRITE |
+ G_PARAM_STATIC_NAME |
+ G_PARAM_STATIC_NICK |
+ G_PARAM_STATIC_BLURB);
+ g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_PIXBUF, properties[PROP_PIXBUF]);
+}
+
+static void
+queue_draw (GObject *sender,
+ GParamSpec *pspec,
+ gpointer self)
+{
+ gtk_widget_queue_draw (GTK_WIDGET (self));
+}
+
+static void
+retro_cairo_display_init (RetroCairoDisplay *self)
+{
+ self->filter = RETRO_VIDEO_FILTER_SMOOTH;
+ self->show_surface = TRUE;
+ g_signal_connect_object (G_OBJECT (self),
+ "notify::sensitive",
+ (GCallback) queue_draw,
+ GTK_WIDGET (self),
+ 0);
+ g_signal_connect_object (G_OBJECT (self),
+ "notify::pixbuf",
+ (GCallback) queue_draw,
+ GTK_WIDGET (self),
+ 0);
+}
+
+GdkPixbuf *
+retro_cairo_display_get_pixbuf (RetroCairoDisplay *self)
+{
+ g_return_val_if_fail (self != NULL, NULL);
+
+ return self->pixbuf;
+}
+
+void
+retro_cairo_display_set_pixbuf (RetroCairoDisplay *self,
+ GdkPixbuf *pixbuf)
+{
+ g_return_if_fail (self != NULL);
+
+ if (self->pixbuf == pixbuf)
+ return;
+
+ g_clear_object (&self->pixbuf);
+
+ if (pixbuf != NULL)
+ self->pixbuf = g_object_ref (pixbuf);
+
+ g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_PIXBUF]);
+}
+
+static void
+retro_cairo_display_on_video_output (RetroCore *sender,
+ guint8 *data,
+ int data_length1,
+ guint width,
+ guint height,
+ gsize pitch,
+ RetroPixelFormat pixel_format,
+ gfloat aspect_ratio,
+ gpointer user_data)
+{
+ RetroCairoDisplay *self = RETRO_CAIRO_DISPLAY (user_data);
+
+ GdkPixbuf *pixbuf;
+ gfloat x_dpi;
+ gchar *x_dpi_string;
+ gchar *y_dpi_string;
+
+ g_return_if_fail (self != NULL);
+
+ self->aspect_ratio = aspect_ratio;
+ pixbuf = gdk_pixbuf_new_from_video (data, width, height, pitch, pixel_format);
+ retro_cairo_display_set_pixbuf (self, pixbuf);
+
+ if (pixbuf != NULL)
+ g_object_unref (pixbuf);
+
+ if (self->pixbuf == NULL)
+ return;
+
+ x_dpi = aspect_ratio * RETRO_CAIRO_DISPLAY_Y_DPI;
+ x_dpi_string = g_strdup_printf ("%g", x_dpi);
+ y_dpi_string = g_strdup_printf ("%g", RETRO_CAIRO_DISPLAY_Y_DPI);
+ gdk_pixbuf_set_option (self->pixbuf, "x-dpi", x_dpi_string);
+ gdk_pixbuf_set_option (self->pixbuf, "y-dpi", y_dpi_string);
+ g_free (y_dpi_string);
+ g_free (x_dpi_string);
+}
+
+void
+retro_cairo_display_set_core (RetroCairoDisplay *self,
+ RetroCore *core)
+{
+ g_return_if_fail (self != NULL);
+
+ if (self->core == core)
+ return;
+
+ if (self->core != NULL) {
+ g_signal_handler_disconnect (G_OBJECT (self->core), self->on_video_output_id);
+ g_clear_object (&self->core);
+ }
+
+ if (core != NULL) {
+ self->core = g_object_ref (core);
+ self->on_video_output_id = g_signal_connect_object (core, "video-output", (GCallback)
retro_cairo_display_on_video_output, self, 0);
+ }
+}
+
+void
+retro_cairo_display_set_filter (RetroCairoDisplay *self,
+ RetroVideoFilter filter)
+{
+ g_return_if_fail (self != NULL);
+
+ self->filter = filter;
+ gtk_widget_queue_draw (GTK_WIDGET (self));
+}
+
+gboolean
+retro_cairo_display_get_coordinates_on_display (RetroCairoDisplay *self,
+ gdouble widget_x,
+ gdouble widget_y,
+ gdouble *display_x,
+ gdouble *display_y)
+{
+ gdouble w = 0.0;
+ gdouble h = 0.0;
+ gdouble x = 0.0;
+ gdouble y = 0.0;
+
+ g_return_val_if_fail (self != NULL, FALSE);
+ g_return_val_if_fail (display_x != NULL, FALSE);
+ g_return_val_if_fail (display_y != NULL, FALSE);
+
+ retro_cairo_display_get_video_box (self, &w, &h, &x, &y);
+
+ // Return coordinates as a [-1.0, 1.0] scale, (0.0, 0.0) is the center.
+ *display_x = ((widget_x - x) * 2.0 - w) / w;
+ *display_y = ((widget_y - y) * 2.0 - h) / h;
+
+ return (-1.0 <= *display_x) && (*display_x <= 1.0) &&
+ (-1.0 <= *display_y) && (*display_y <= 1.0);
+}
+
+void
+retro_cairo_display_show_video (RetroCairoDisplay *self)
+{
+ g_return_if_fail (self != NULL);
+
+ self->show_surface = TRUE;
+ gtk_widget_queue_draw (GTK_WIDGET (self));
+}
+
+void
+retro_cairo_display_hide_video (RetroCairoDisplay *self)
+{
+ g_return_if_fail (self != NULL);
+
+ self->show_surface = FALSE;
+ gtk_widget_queue_draw (GTK_WIDGET (self));
+}
+
+RetroCairoDisplay *
+retro_cairo_display_new (void)
+{
+ return g_object_new (RETRO_TYPE_CAIRO_DISPLAY, NULL);
+}
diff --git a/retro-gtk/retro-cairo-display.h b/retro-gtk/retro-cairo-display.h
new file mode 100644
index 0000000..b39394c
--- /dev/null
+++ b/retro-gtk/retro-cairo-display.h
@@ -0,0 +1,37 @@
+// This file is part of retro-gtk. License: GPL-3.0+.
+
+#ifndef RETRO_CAIRO_DISPLAY_H
+#define RETRO_CAIRO_DISPLAY_H
+
+#include <gtk/gtk.h>
+#include "retro-video-filter.h"
+
+G_BEGIN_DECLS
+
+// FIXME Remove as soon as possible.
+typedef struct _RetroCore RetroCore;
+
+#define RETRO_TYPE_CAIRO_DISPLAY (retro_cairo_display_get_type())
+
+G_DECLARE_FINAL_TYPE (RetroCairoDisplay, retro_cairo_display, RETRO, CAIRO_DISPLAY, GtkDrawingArea)
+
+RetroCairoDisplay *retro_cairo_display_new (void);
+GdkPixbuf *retro_cairo_display_get_pixbuf (RetroCairoDisplay *self);
+void retro_cairo_display_set_pixbuf (RetroCairoDisplay *self,
+ GdkPixbuf *pixbuf);
+void retro_cairo_display_set_core (RetroCairoDisplay *self,
+ RetroCore *core);
+void retro_cairo_display_set_filter (RetroCairoDisplay *self,
+ RetroVideoFilter filter);
+gboolean retro_cairo_display_get_coordinates_on_display (RetroCairoDisplay *self,
+ gdouble widget_x,
+ gdouble widget_y,
+ gdouble *display_x,
+ gdouble *display_y);
+void retro_cairo_display_show_video (RetroCairoDisplay *self);
+void retro_cairo_display_hide_video (RetroCairoDisplay *self);
+
+G_END_DECLS
+
+#endif /* RETRO_CAIRO_DISPLAY_H */
+
diff --git a/retro-gtk/retro-core-view.h b/retro-gtk/retro-core-view.h
index bf26158..2e996a0 100644
--- a/retro-gtk/retro-core-view.h
+++ b/retro-gtk/retro-core-view.h
@@ -2,14 +2,13 @@
#define RETRO_CORE_VIEW_H
#include <gtk/gtk.h>
+#include "retro-cairo-display.h"
#include "retro-device-type.h"
#include "retro-input-device.h"
G_BEGIN_DECLS
// FIXME Remove as soon as possible.
-typedef struct _RetroCairoDisplay RetroCairoDisplay;
-// FIXME Remove as soon as possible.
typedef struct _RetroCore RetroCore;
#define RETRO_TYPE_CORE_VIEW (retro_core_view_get_type())
diff --git a/retro-gtk/retro-gtk.h b/retro-gtk/retro-gtk.h
index 8769435..d054705 100644
--- a/retro-gtk/retro-gtk.h
+++ b/retro-gtk/retro-gtk.h
@@ -5,6 +5,7 @@
#include "retro-analog-id.h"
#include "retro-analog-index.h"
+#include "retro-cairo-display.h"
#include "retro-core-view.h"
#include "retro-device-type.h"
#include "retro-gtk-vala.h"
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