/* Based on GTK code by the Chromium Authors. The original header for that code
* continues below */
/* GDK - The GIMP Drawing Kit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* 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 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <stdio.h>
#include <gdk/gdk.h>
#include <SkCanvas.h>
#include <SkBitmap.h>
#include <SkDevice.h>
#include "GdkSkia.h"
static GdkGC *gdk_skia_create_gc (GdkDrawable *drawable,
GdkGCValues *values,
GdkGCValuesMask mask);
static void gdk_skia_draw_rectangle (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height);
static void gdk_skia_draw_arc (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height,
gint angle1,
gint angle2);
static void gdk_skia_draw_polygon (GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
GdkPoint *points,
gint npoints);
static void gdk_skia_draw_text (GdkDrawable *drawable,
GdkFont *font,
GdkGC *gc,
gint x,
gint y,
const gchar *text,
gint text_length);
static void gdk_skia_draw_text_wc (GdkDrawable *drawable,
GdkFont *font,
GdkGC *gc,
gint x,
gint y,
const GdkWChar *text,
gint text_length);
static void gdk_skia_draw_drawable (GdkDrawable *drawable,
GdkGC *gc,
GdkPixmap *src,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height);
static void gdk_skia_draw_points (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints);
static void gdk_skia_draw_segments (GdkDrawable *drawable,
GdkGC *gc,
GdkSegment *segs,
gint nsegs);
static void gdk_skia_draw_lines (GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints);
static void gdk_skia_draw_glyphs (GdkDrawable *drawable,
GdkGC *gc,
PangoFont *font,
gint x,
gint y,
PangoGlyphString *glyphs);
static void gdk_skia_draw_glyphs_transformed (GdkDrawable *drawable,
GdkGC *gc,
PangoMatrix *matrix,
PangoFont *font,
gint x,
gint y,
PangoGlyphString *glyphs);
static void gdk_skia_draw_image (GdkDrawable *drawable,
GdkGC *gc,
GdkImage *image,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height);
static void gdk_skia_draw_pixbuf (GdkDrawable *drawable,
GdkGC *gc,
GdkPixbuf *pixbuf,
gint src_x,
gint src_y,
gint dest_x,
gint dest_y,
gint width,
gint height,
GdkRgbDither dither,
gint x_dither,
gint y_dither);
static void gdk_skia_draw_trapezoids (GdkDrawable *drawable,
GdkGC *gc,
GdkTrapezoid *trapezoids,
gint n_trapezoids);
static void gdk_skia_real_get_size (GdkDrawable *drawable,
gint *width,
gint *height);
static GdkImage* gdk_skia_copy_to_image (GdkDrawable *drawable,
GdkImage *image,
gint src_x,
gint src_y,
gint dest_x,
gint dest_y,
gint width,
gint height);
static cairo_surface_t *gdk_skia_ref_cairo_surface (GdkDrawable *drawable);
static GdkVisual* gdk_skia_real_get_visual (GdkDrawable *drawable);
static gint gdk_skia_real_get_depth (GdkDrawable *drawable);
static void gdk_skia_real_set_colormap (GdkDrawable *drawable,
GdkColormap *cmap);
static GdkColormap* gdk_skia_real_get_colormap (GdkDrawable *drawable);
static GdkScreen* gdk_skia_real_get_screen (GdkDrawable *drawable);
static void gdk_skia_init (GdkSkiaObject *skia);
static void gdk_skia_class_init (GdkSkiaObjectClass *klass);
static void gdk_skia_finalize (GObject *object);
static gpointer parent_class = NULL;
// -----------------------------------------------------------------------------
// Usually GDK code is C code. However, since we are interfacing to a C++
// library, we must compile in C++ mode to parse its headers etc. Thankfully,
// these are the only non-static symbol in the file so we can just wrap them in
// an extern decl to disable name mangling and everything should be happy.
// -----------------------------------------------------------------------------
extern "C" {
GType
gdk_skia_get_type (void)
{
static GType object_type = 0;
if (!object_type)
object_type = g_type_register_static_simple (GDK_TYPE_DRAWABLE,
"GdkSkia",
sizeof (GdkSkiaObjectClass),
(GClassInitFunc) gdk_skia_class_init,
sizeof (GdkSkiaObject),
(GInstanceInitFunc) gdk_skia_init,
(GTypeFlags) 0);
return object_type;
}
GdkSkia*
gdk_skia_new(SkCanvas *canvas)
{
GdkSkia *skia = GDK_SKIA(g_object_new (GDK_TYPE_SKIA, NULL));
reinterpret_cast<GdkSkiaObject*>(skia)->canvas = canvas;
return skia;
}
} // extern "C"
static void
gdk_skia_init (GdkSkiaObject *skia)
{
/* 0 initialization is fine for us */
}
static void
gdk_skia_class_init (GdkSkiaObjectClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GdkDrawableClass *drawable_class = GDK_DRAWABLE_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gdk_skia_finalize;
drawable_class->create_gc = gdk_skia_create_gc;
drawable_class->draw_rectangle = gdk_skia_draw_rectangle;
drawable_class->draw_arc = gdk_skia_draw_arc;
drawable_class->draw_polygon = gdk_skia_draw_polygon;
drawable_class->draw_text = gdk_skia_draw_text;
drawable_class->draw_text_wc = gdk_skia_draw_text_wc;
drawable_class->draw_drawable = gdk_skia_draw_drawable;
drawable_class->draw_points = gdk_skia_draw_points;
drawable_class->draw_segments = gdk_skia_draw_segments;
drawable_class->draw_lines = gdk_skia_draw_lines;
drawable_class->draw_glyphs = gdk_skia_draw_glyphs;
drawable_class->draw_glyphs_transformed = gdk_skia_draw_glyphs_transformed;
drawable_class->draw_image = gdk_skia_draw_image;
drawable_class->draw_pixbuf = gdk_skia_draw_pixbuf;
drawable_class->draw_trapezoids = gdk_skia_draw_trapezoids;
drawable_class->get_depth = gdk_skia_real_get_depth;
drawable_class->get_screen = gdk_skia_real_get_screen;
drawable_class->get_size = gdk_skia_real_get_size;
drawable_class->set_colormap = gdk_skia_real_set_colormap;
drawable_class->get_colormap = gdk_skia_real_get_colormap;
drawable_class->get_visual = gdk_skia_real_get_visual;
drawable_class->_copy_to_image = gdk_skia_copy_to_image;
drawable_class->ref_cairo_surface = gdk_skia_ref_cairo_surface;
}
static void
gdk_skia_finalize (GObject *object)
{
GdkSkiaObject *const skia = (GdkSkiaObject *) object;
if (skia->surface)
cairo_surface_destroy(skia->surface);
G_OBJECT_CLASS (parent_class)->finalize(object);
}
#define NOTIMPLEMENTED fprintf(stderr, "GDK Skia not implemented: %s\n", __PRETTY_FUNCTION__)
static GdkGC *
gdk_skia_create_gc(GdkDrawable *drawable,
GdkGCValues *values,
GdkGCValuesMask mask) {
NOTIMPLEMENTED;
return NULL;
}
static void
gc_set_paint(GdkGC *gc, SkPaint *paint) {
GdkGCValues values;
gdk_gc_get_values(gc, &values);
paint->setARGB(255,
values.foreground.pixel >> 16,
values.foreground.pixel >> 8,
values.foreground.pixel);
paint->setStrokeWidth(values.line_width);
}
static void
gdk_skia_draw_rectangle(GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height) {
GdkSkiaObject *skia = (GdkSkiaObject *) drawable;
SkPaint paint;
gc_set_paint(gc, &paint);
if (filled) {
paint.setStyle(SkPaint::kFill_Style);
} else {
paint.setStyle(SkPaint::kStroke_Style);
}
SkRect rect;
rect.set(x, y, x + width, y + height);
skia->canvas->drawRect(rect, paint);
}
static void
gdk_skia_draw_arc(GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
gint x,
gint y,
gint width,
gint height,
gint angle1,
gint angle2) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_polygon(GdkDrawable *drawable,
GdkGC *gc,
gboolean filled,
GdkPoint *points,
gint npoints) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_text(GdkDrawable *drawable,
GdkFont *font,
GdkGC *gc,
gint x,
gint y,
const gchar *text,
gint text_length) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_text_wc(GdkDrawable *drawable,
GdkFont *font,
GdkGC *gc,
gint x,
gint y,
const GdkWChar *text,
gint text_length) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_drawable(GdkDrawable *drawable,
GdkGC *gc,
GdkPixmap *src,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_points(GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_segments(GdkDrawable *drawable,
GdkGC *gc,
GdkSegment *segs,
gint nsegs) {
GdkSkiaObject *skia = (GdkSkiaObject *) drawable;
GdkGCValues values;
SkPaint paint;
int nskip = 1;
gc_set_paint(gc, &paint);
gdk_gc_get_values(gc, &values);
// TODO(jhawkins): how to set line width in skia?
// GDK_LINE_ON_OFF_DASH only renders the even segments
if (values.line_style == GDK_LINE_ON_OFF_DASH)
nskip++;
for (int i = 0; i < nsegs; i += nskip) {
// TODO(jhawkins): GDK_LINE_DOUBLE_DASH
skia->canvas->drawLine(segs[i].x1, segs[i].y1,
segs[i].x2, segs[i].y2, paint);
}
}
static void
gdk_skia_draw_lines(GdkDrawable *drawable,
GdkGC *gc,
GdkPoint *points,
gint npoints) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_glyphs(GdkDrawable *drawable,
GdkGC *gc,
PangoFont *font,
gint x,
gint y,
PangoGlyphString *glyphs) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_glyphs_transformed(GdkDrawable *drawable,
GdkGC *gc,
PangoMatrix *matrix,
PangoFont *font,
gint x,
gint y,
PangoGlyphString *glyphs) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_image(GdkDrawable *drawable,
GdkGC *gc,
GdkImage *image,
gint xsrc,
gint ysrc,
gint xdest,
gint ydest,
gint width,
gint height) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_pixbuf(GdkDrawable *drawable,
GdkGC *gc,
GdkPixbuf *pixbuf,
gint src_x,
gint src_y,
gint dest_x,
gint dest_y,
gint width,
gint height,
GdkRgbDither dither,
gint x_dither,
gint y_dither) {
NOTIMPLEMENTED;
}
static void
gdk_skia_draw_trapezoids(GdkDrawable *drawable,
GdkGC *gc,
GdkTrapezoid *trapezoids,
gint n_trapezoids) {
NOTIMPLEMENTED;
}
static void
gdk_skia_real_get_size(GdkDrawable *drawable,
gint *width,
gint *height) {
GdkSkiaObject *const skia = (GdkSkiaObject *) drawable;
SkDevice *const dev = skia->canvas->getDevice();
*width = dev->width();
*height = dev->height();
}
static GdkImage*
gdk_skia_copy_to_image(GdkDrawable *drawable,
GdkImage *image,
gint src_x,
gint src_y,
gint dest_x,
gint dest_y,
gint width,
gint height) {
NOTIMPLEMENTED;
return NULL;
}
static cairo_surface_t *
gdk_skia_ref_cairo_surface(GdkDrawable *drawable) {
GdkSkiaObject *const skia = (GdkSkiaObject *) drawable;
if (!skia->surface) {
SkDevice *const dev = skia->canvas->getDevice();
const SkBitmap *const bm = &dev->accessBitmap(true);
skia->surface = cairo_image_surface_create_for_data
((unsigned char *) bm->getPixels(),
CAIRO_FORMAT_ARGB32, dev->width(), dev->height(), bm->rowBytes());
}
SkMatrix matrix = skia->canvas->getTotalMatrix();
int x_shift = SkScalarRound(matrix.getTranslateX());
int y_shift = SkScalarRound(matrix.getTranslateY());
cairo_surface_set_device_offset(skia->surface, x_shift, y_shift);
return cairo_surface_reference(skia->surface);
}
static GdkVisual*
gdk_skia_real_get_visual(GdkDrawable *drawable) {
NOTIMPLEMENTED;
return NULL;
}
static gint
gdk_skia_real_get_depth(GdkDrawable *drawable) {
GdkSkiaObject *skia = (GdkSkiaObject *) drawable;
const SkBitmap::Config config = skia->canvas->getDevice()->config();
switch (config) {
case SkBitmap::kARGB_8888_Config:
return 24;
default:
// NOTREACHED
*reinterpret_cast<char*>(NULL) = 0;
return 0;
}
}
static void
gdk_skia_real_set_colormap(GdkDrawable *drawable,
GdkColormap *cmap) {
NOTIMPLEMENTED;
}
static GdkColormap*
gdk_skia_real_get_colormap(GdkDrawable *drawable) {
NOTIMPLEMENTED;
return NULL;
}
static GdkScreen*
gdk_skia_real_get_screen(GdkDrawable *drawable) {
NOTIMPLEMENTED;
return NULL;
}