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+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2008 Mozilla Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is Mozilla Corporation.
+ *
+ * Contributor(s):
+ * Vladimir Vukicevic <vladimir@mozilla.com>
+ */
+
+/* Get INT16_MIN etc. as per C99 */
+#define __STDC_LIMIT_MACROS
+
+#include "cairoint.h"
+
+#include "cairo-clip-private.h"
+#include "cairo-default-context-private.h"
+#include "cairo-error-private.h"
+#include "cairo-region-private.h"
+#include "cairo-surface-clipper-private.h"
+#include "cairo-types-private.h"
+#include "cairo-image-surface-private.h"
+#include "cairo-pattern-private.h"
+#include "cairo-surface-backend-private.h"
+#include "cairo-surface-fallback-private.h"
+
+#include "cairo-ft.h"
+#include "cairo-qt.h"
+
+#include <memory>
+
+#include <QtGui/QPainter>
+#include <QtGui/QPaintEngine>
+#include <QtGui/QPaintDevice>
+#include <QtGui/QImage>
+#include <QtGui/QPixmap>
+#include <QtGui/QBrush>
+#include <QtGui/QPen>
+#include <QWidget>
+#include <QtCore/QVarLengthArray>
+
+#if ((QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)) || defined(QT_GLYPHS_API_BACKPORT)) && 0
+extern void qt_draw_glyphs(QPainter *, const quint32 *glyphs, const QPointF *positions, int count);
+#endif
+
+#include <sys/time.h>
+
+/* Enable workaround slow regional Qt paths */
+#define ENABLE_FAST_FILL 0
+#define ENABLE_FAST_CLIP 0
+
+#if 0
+#define D(x) x
+static const char *
+_opstr (cairo_operator_t op)
+{
+ const char *ops[] = {
+ "CLEAR",
+ "SOURCE",
+ "OVER",
+ "IN",
+ "OUT",
+ "ATOP",
+ "DEST",
+ "DEST_OVER",
+ "DEST_IN",
+ "DEST_OUT",
+ "DEST_ATOP",
+ "XOR",
+ "ADD",
+ "SATURATE"
+ };
+
+ if (op < CAIRO_OPERATOR_CLEAR || op > CAIRO_OPERATOR_SATURATE)
+ return "(\?\?\?)";
+
+ return ops[op];
+}
+#else
+#define D(x) do { } while(0)
+#endif
+
+#ifndef CAIRO_INT_STATUS_SUCCESS
+#define CAIRO_INT_STATUS_SUCCESS ((cairo_int_status_t) CAIRO_STATUS_SUCCESS)
+#endif
+
+/* Qt::PenStyle optimization based on the assumption that dots are 1*w and dashes are 3*w. */
+#define DOT_LENGTH 1.0
+#define DASH_LENGTH 3.0
+
+struct cairo_qt_surface_t {
+ cairo_surface_t base;
+
+ cairo_bool_t supports_porter_duff;
+
+ QPainter *p;
+
+ /* The pixmap/image constructors will store their objects here */
+ QPixmap *pixmap;
+ QImage *image;
+
+ QRect window;
+
+ cairo_surface_clipper_t clipper;
+
+ cairo_surface_t *image_equiv;
+};
+
+/* Will be true if we ever try to create a QPixmap and end
+ * up with one without an alpha channel.
+ */
+static cairo_bool_t _qpixmaps_have_no_alpha = FALSE;
+
+/*
+ * Helper methods
+ */
+
+static QPainter::CompositionMode
+_qpainter_compositionmode_from_cairo_op (cairo_operator_t op)
+{
+ switch (op) {
+ case CAIRO_OPERATOR_CLEAR:
+ return QPainter::CompositionMode_Clear;
+
+ case CAIRO_OPERATOR_SOURCE:
+ return QPainter::CompositionMode_Source;
+ case CAIRO_OPERATOR_OVER:
+ return QPainter::CompositionMode_SourceOver;
+ case CAIRO_OPERATOR_IN:
+ return QPainter::CompositionMode_SourceIn;
+ case CAIRO_OPERATOR_OUT:
+ return QPainter::CompositionMode_SourceOut;
+ case CAIRO_OPERATOR_ATOP:
+ return QPainter::CompositionMode_SourceAtop;
+
+ case CAIRO_OPERATOR_DEST:
+ return QPainter::CompositionMode_Destination;
+ case CAIRO_OPERATOR_DEST_OVER:
+ return QPainter::CompositionMode_DestinationOver;
+ case CAIRO_OPERATOR_DEST_IN:
+ return QPainter::CompositionMode_DestinationIn;
+ case CAIRO_OPERATOR_DEST_OUT:
+ return QPainter::CompositionMode_DestinationOut;
+ case CAIRO_OPERATOR_DEST_ATOP:
+ return QPainter::CompositionMode_DestinationAtop;
+
+ case CAIRO_OPERATOR_XOR:
+ return QPainter::CompositionMode_Xor;
+
+ default:
+ case CAIRO_OPERATOR_ADD:
+ case CAIRO_OPERATOR_SATURATE:
+ case CAIRO_OPERATOR_MULTIPLY:
+ case CAIRO_OPERATOR_SCREEN:
+ case CAIRO_OPERATOR_OVERLAY:
+ case CAIRO_OPERATOR_DARKEN:
+ case CAIRO_OPERATOR_LIGHTEN:
+ case CAIRO_OPERATOR_COLOR_DODGE:
+ case CAIRO_OPERATOR_COLOR_BURN:
+ case CAIRO_OPERATOR_HARD_LIGHT:
+ case CAIRO_OPERATOR_SOFT_LIGHT:
+ case CAIRO_OPERATOR_DIFFERENCE:
+ case CAIRO_OPERATOR_EXCLUSION:
+ case CAIRO_OPERATOR_HSL_HUE:
+ case CAIRO_OPERATOR_HSL_SATURATION:
+ case CAIRO_OPERATOR_HSL_COLOR:
+ case CAIRO_OPERATOR_HSL_LUMINOSITY:
+ ASSERT_NOT_REACHED;
+ }
+}
+
+static bool
+_op_is_supported (cairo_qt_surface_t *qs, cairo_operator_t op)
+{
+ if (qs->p == NULL)
+ return false;
+
+ if (qs->supports_porter_duff) {
+ switch (op) {
+ case CAIRO_OPERATOR_CLEAR:
+ case CAIRO_OPERATOR_SOURCE:
+ case CAIRO_OPERATOR_OVER:
+ case CAIRO_OPERATOR_IN:
+ case CAIRO_OPERATOR_OUT:
+ case CAIRO_OPERATOR_ATOP:
+
+ case CAIRO_OPERATOR_DEST:
+ case CAIRO_OPERATOR_DEST_OVER:
+ case CAIRO_OPERATOR_DEST_IN:
+ case CAIRO_OPERATOR_DEST_OUT:
+ case CAIRO_OPERATOR_DEST_ATOP:
+
+ case CAIRO_OPERATOR_XOR:
+ return TRUE;
+
+ default:
+ ASSERT_NOT_REACHED;
+ case CAIRO_OPERATOR_ADD:
+ case CAIRO_OPERATOR_SATURATE:
+ case CAIRO_OPERATOR_MULTIPLY:
+ case CAIRO_OPERATOR_SCREEN:
+ case CAIRO_OPERATOR_OVERLAY:
+ case CAIRO_OPERATOR_DARKEN:
+ case CAIRO_OPERATOR_LIGHTEN:
+ case CAIRO_OPERATOR_COLOR_DODGE:
+ case CAIRO_OPERATOR_COLOR_BURN:
+ case CAIRO_OPERATOR_HARD_LIGHT:
+ case CAIRO_OPERATOR_SOFT_LIGHT:
+ case CAIRO_OPERATOR_DIFFERENCE:
+ case CAIRO_OPERATOR_EXCLUSION:
+ case CAIRO_OPERATOR_HSL_HUE:
+ case CAIRO_OPERATOR_HSL_SATURATION:
+ case CAIRO_OPERATOR_HSL_COLOR:
+ case CAIRO_OPERATOR_HSL_LUMINOSITY:
+ return FALSE;
+
+ }
+ } else {
+ return op == CAIRO_OPERATOR_OVER;
+ }
+}
+
+static cairo_format_t
+_cairo_format_from_qimage_format (QImage::Format fmt)
+{
+ switch (fmt) {
+ case QImage::Format_ARGB32_Premultiplied:
+ return CAIRO_FORMAT_ARGB32;
+ case QImage::Format_RGB32:
+ return CAIRO_FORMAT_RGB24;
+ case QImage::Format_Indexed8: // XXX not quite
+ return CAIRO_FORMAT_A8;
+#ifdef WORDS_BIGENDIAN
+ case QImage::Format_Mono:
+#else
+ case QImage::Format_MonoLSB:
+#endif
+ return CAIRO_FORMAT_A1;
+
+ case QImage::Format_Invalid:
+#ifdef WORDS_BIGENDIAN
+ case QImage::Format_MonoLSB:
+#else
+ case QImage::Format_Mono:
+#endif
+ case QImage::Format_ARGB32:
+ case QImage::Format_RGB16:
+ case QImage::Format_ARGB8565_Premultiplied:
+ case QImage::Format_RGB666:
+ case QImage::Format_ARGB6666_Premultiplied:
+ case QImage::Format_RGB555:
+ case QImage::Format_ARGB8555_Premultiplied:
+ case QImage::Format_RGB888:
+ case QImage::Format_RGB444:
+ case QImage::Format_ARGB4444_Premultiplied:
+ case QImage::NImageFormats:
+ default:
+ ASSERT_NOT_REACHED;
+ return (cairo_format_t) -1;
+ }
+}
+
+static QImage::Format
+_qimage_format_from_cairo_format (cairo_format_t fmt)
+{
+ switch (fmt) {
+ case CAIRO_FORMAT_INVALID:
+ ASSERT_NOT_REACHED;
+ case CAIRO_FORMAT_ARGB32:
+ return QImage::Format_ARGB32_Premultiplied;
+ case CAIRO_FORMAT_RGB24:
+ return QImage::Format_RGB32;
+ case CAIRO_FORMAT_RGB16_565:
+ return QImage::Format_RGB16;
+ case CAIRO_FORMAT_A8:
+ return QImage::Format_Indexed8; // XXX not quite
+ case CAIRO_FORMAT_A1:
+#ifdef WORDS_BIGENDIAN
+ return QImage::Format_Mono; // XXX think we need to choose between this and LSB
+#else
+ return QImage::Format_MonoLSB;
+#endif
+ case CAIRO_FORMAT_RGB30:
+ return QImage::Format_Mono;
+ }
+
+ return QImage::Format_Mono;
+}
+
+static inline QMatrix
+_qmatrix_from_cairo_matrix (const cairo_matrix_t& m)
+{
+ return QMatrix(m.xx, m.yx, m.xy, m.yy, m.x0, m.y0);
+}
+
+/* Path conversion */
+typedef struct _qpainter_path_transform {
+ QPainterPath path;
+ const cairo_matrix_t *ctm_inverse;
+} qpainter_path_data;
+
+/* cairo path -> execute in context */
+static cairo_status_t
+_cairo_path_to_qpainterpath_move_to (void *closure, const cairo_point_t *point)
+{
+ qpainter_path_data *pdata = static_cast <qpainter_path_data *> (closure);
+ double x = _cairo_fixed_to_double (point->x);
+ double y = _cairo_fixed_to_double (point->y);
+
+ if (pdata->ctm_inverse)
+ cairo_matrix_transform_point (pdata->ctm_inverse, &x, &y);
+
+ pdata->path.moveTo(x, y);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cairo_path_to_qpainterpath_line_to (void *closure, const cairo_point_t *point)
+{
+ qpainter_path_data *pdata = static_cast <qpainter_path_data *> (closure);
+ double x = _cairo_fixed_to_double (point->x);
+ double y = _cairo_fixed_to_double (point->y);
+
+ if (pdata->ctm_inverse)
+ cairo_matrix_transform_point (pdata->ctm_inverse, &x, &y);
+
+ pdata->path.lineTo(x, y);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cairo_path_to_qpainterpath_curve_to (void *closure, const cairo_point_t *p0, const cairo_point_t *p1, const cairo_point_t *p2)
+{
+ qpainter_path_data *pdata = static_cast <qpainter_path_data *> (closure);
+ double x0 = _cairo_fixed_to_double (p0->x);
+ double y0 = _cairo_fixed_to_double (p0->y);
+ double x1 = _cairo_fixed_to_double (p1->x);
+ double y1 = _cairo_fixed_to_double (p1->y);
+ double x2 = _cairo_fixed_to_double (p2->x);
+ double y2 = _cairo_fixed_to_double (p2->y);
+
+ if (pdata->ctm_inverse) {
+ cairo_matrix_transform_point (pdata->ctm_inverse, &x0, &y0);
+ cairo_matrix_transform_point (pdata->ctm_inverse, &x1, &y1);
+ cairo_matrix_transform_point (pdata->ctm_inverse, &x2, &y2);
+ }
+
+ pdata->path.cubicTo (x0, y0, x1, y1, x2, y2);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cairo_path_to_qpainterpath_close_path (void *closure)
+{
+ qpainter_path_data *pdata = static_cast <qpainter_path_data *> (closure);
+
+ pdata->path.closeSubpath();
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static QPainterPath
+path_to_qt (const cairo_path_fixed_t *path,
+ const cairo_matrix_t *ctm_inverse = NULL)
+{
+ qpainter_path_data data;
+ cairo_status_t status;
+
+ if (ctm_inverse && _cairo_matrix_is_identity (ctm_inverse))
+ ctm_inverse = NULL;
+ data.ctm_inverse = ctm_inverse;
+
+ status = _cairo_path_fixed_interpret (path,
+ _cairo_path_to_qpainterpath_move_to,
+ _cairo_path_to_qpainterpath_line_to,
+ _cairo_path_to_qpainterpath_curve_to,
+ _cairo_path_to_qpainterpath_close_path,
+ &data);
+ assert (status == CAIRO_STATUS_SUCCESS);
+
+ return data.path;
+}
+
+static inline QPainterPath
+path_to_qt (const cairo_path_fixed_t *path,
+ cairo_fill_rule_t fill_rule,
+ cairo_matrix_t *ctm_inverse = NULL)
+{
+ QPainterPath qpath = path_to_qt (path, ctm_inverse);
+
+ qpath.setFillRule (fill_rule == CAIRO_FILL_RULE_WINDING ?
+ Qt::WindingFill :
+ Qt::OddEvenFill);
+
+ return qpath;
+}
+
+/*
+ * Surface backend methods
+ */
+static cairo_surface_t *
+_cairo_qt_surface_create_similar (void *abstract_surface,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+ bool use_pixmap;
+
+ D(fprintf(stderr, "q[%p] create_similar: %d %d [%d] -> ", abstract_surface, width, height, content));
+
+ use_pixmap = qs->image == NULL;
+ if (use_pixmap) {
+ switch (content) {
+ case CAIRO_CONTENT_ALPHA:
+ use_pixmap = FALSE;
+ break;
+ case CAIRO_CONTENT_COLOR:
+ break;
+ case CAIRO_CONTENT_COLOR_ALPHA:
+ use_pixmap = ! _qpixmaps_have_no_alpha;
+ break;
+ }
+ }
+
+ if (use_pixmap) {
+ cairo_surface_t *result =
+ cairo_qt_surface_create_with_qpixmap (content, width, height);
+
+ /* XXX result->content is always content. ??? */
+ if (result->content == content) {
+ D(fprintf(stderr, "qpixmap content: %d\n", content));
+ return result;
+ }
+
+ _qpixmaps_have_no_alpha = TRUE;
+ cairo_surface_destroy (result);
+ }
+
+ D(fprintf (stderr, "qimage\n"));
+ return cairo_qt_surface_create_with_qimage
+ (_cairo_format_from_content (content), width, height);
+}
+
+static cairo_status_t
+_cairo_qt_surface_finish (void *abstract_surface)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ D(fprintf(stderr, "q[%p] finish\n", abstract_surface));
+
+ /* Only delete p if we created it */
+ if (qs->image || qs->pixmap)
+ delete qs->p;
+ else
+ qs->p->restore ();
+
+ if (qs->image_equiv)
+ cairo_surface_destroy (qs->image_equiv);
+
+ _cairo_surface_clipper_reset (&qs->clipper);
+
+ if (qs->image)
+ delete qs->image;
+
+ if (qs->pixmap)
+ delete qs->pixmap;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static void
+_qimg_destroy (void *closure)
+{
+ QImage *qimg = (QImage *) closure;
+ delete qimg;
+}
+
+static cairo_status_t
+_cairo_qt_surface_acquire_source_image (void *abstract_surface,
+ cairo_image_surface_t **image_out,
+ void **image_extra)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ D(fprintf(stderr, "q[%p] acquire_source_image\n", abstract_surface));
+
+ *image_extra = NULL;
+
+ if (qs->image_equiv) {
+ *image_out = (cairo_image_surface_t*)
+ cairo_surface_reference (qs->image_equiv);
+
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ if (qs->pixmap) {
+ QImage *qimg = new QImage(qs->pixmap->toImage());
+ cairo_surface_t *image;
+ cairo_status_t status;
+
+ image = cairo_image_surface_create_for_data (qimg->bits(),
+ _cairo_format_from_qimage_format (qimg->format()),
+ qimg->width(), qimg->height(),
+ qimg->bytesPerLine());
+
+ status = _cairo_user_data_array_set_data (&image->user_data,
+ (const cairo_user_data_key_t *)&_qimg_destroy,
+ qimg,
+ _qimg_destroy);
+ if (status) {
+ cairo_surface_destroy (image);
+ return status;
+ }
+
+ *image_out = (cairo_image_surface_t *) image;
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+}
+
+static void
+_cairo_qt_surface_release_source_image (void *abstract_surface,
+ cairo_image_surface_t *image,
+ void *image_extra)
+{
+ //cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ D(fprintf(stderr, "q[%p] release_source_image\n", abstract_surface));
+
+ cairo_surface_destroy (&image->base);
+}
+
+struct _qimage_surface {
+ cairo_image_surface_t image;
+ QImage *qimg;
+};
+
+static cairo_surface_t *
+map_qimage_to_image (QImage *qimg, const cairo_rectangle_int_t *extents)
+{
+ struct _qimage_surface *surface;
+ pixman_image_t *pixman_image;
+ pixman_format_code_t pixman_format;
+ uint8_t *data;
+
+ if (qimg == NULL)
+ return _cairo_surface_create_in_error (CAIRO_STATUS_NO_MEMORY);
+
+ switch (qimg->format()) {
+ case QImage::Format_ARGB32_Premultiplied:
+ pixman_format = PIXMAN_a8r8g8b8;
+ break;
+ case QImage::Format_RGB32:
+ pixman_format = PIXMAN_x8r8g8b8;
+ break;
+ case QImage::Format_Indexed8: // XXX not quite
+ pixman_format = PIXMAN_a8;
+ break;
+#ifdef WORDS_BIGENDIAN
+ case QImage::Format_Mono:
+#else
+ case QImage::Format_MonoLSB:
+#endif
+ pixman_format = PIXMAN_a1;
+ break;
+
+ case QImage::Format_Invalid:
+#ifdef WORDS_BIGENDIAN
+ case QImage::Format_MonoLSB:
+#else
+ case QImage::Format_Mono:
+#endif
+ case QImage::Format_ARGB32:
+ case QImage::Format_RGB16:
+ case QImage::Format_ARGB8565_Premultiplied:
+ case QImage::Format_RGB666:
+ case QImage::Format_ARGB6666_Premultiplied:
+ case QImage::Format_RGB555:
+ case QImage::Format_ARGB8555_Premultiplied:
+ case QImage::Format_RGB888:
+ case QImage::Format_RGB444:
+ case QImage::Format_ARGB4444_Premultiplied:
+ case QImage::NImageFormats:
+ default:
+ delete qimg;
+ return _cairo_surface_create_in_error (CAIRO_STATUS_INVALID_FORMAT);
+ }
+
+ data = qimg->bits();
+ data += extents->y * qimg->bytesPerLine();
+ data += extents->x * PIXMAN_FORMAT_BPP (pixman_format) / 8;
+
+ pixman_image = pixman_image_create_bits (pixman_format,
+ extents->width,
+ extents->height,
+ (uint32_t *)data,
+ qimg->bytesPerLine());
+ if (pixman_image == NULL) {
+ delete qimg;
+ return _cairo_surface_create_in_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ surface = (struct _qimage_surface *) malloc (sizeof(*surface));
+ if (unlikely (surface == NULL)) {
+ pixman_image_unref (pixman_image);
+ delete qimg;
+ return _cairo_surface_create_in_error (CAIRO_STATUS_NO_MEMORY);
+ }
+
+ _cairo_image_surface_init (&surface->image, pixman_image, pixman_format);
+ surface->qimg = qimg;
+
+ cairo_surface_set_device_offset (&surface->image.base,
+ -extents->x, -extents->y);
+
+ return &surface->image.base;
+}
+
+static cairo_image_surface_t *
+_cairo_qt_surface_map_to_image (void *abstract_surface,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+ QImage *qimg = NULL;
+
+ D(fprintf(stderr, "q[%p] acquire_dest_image\n", abstract_surface));
+
+ if (qs->image_equiv)
+ return _cairo_image_surface_map_to_image (qs->image_equiv,
+ extents);
+
+ QPoint offset;
+
+ if (qs->pixmap) {
+ qimg = new QImage(qs->pixmap->toImage());
+ } else {
+ // Try to figure out what kind of QPaintDevice we have, and
+ // how we can grab an image from it
+ QPaintDevice *pd = qs->p->device();
+ if (!pd)
+ return (cairo_image_surface_t *) _cairo_surface_create_in_error (CAIRO_STATUS_NO_MEMORY);
+
+ QPaintDevice *rpd = QPainter::redirected(pd, &offset);
+ if (rpd)
+ pd = rpd;
+
+ if (pd->devType() == QInternal::Image) {
+ qimg = new QImage(((QImage*) pd)->copy());
+ } else if (pd->devType() == QInternal::Pixmap) {
+ qimg = new QImage(((QPixmap*) pd)->toImage());
+ } else if (pd->devType() == QInternal::Widget) {
+ qimg = new QImage(QPixmap::grabWindow(((QWidget*)pd)->winId()).toImage());
+ }
+ }
+
+ return (cairo_image_surface_t *) map_qimage_to_image (qimg, extents);
+}
+
+static cairo_int_status_t
+_cairo_qt_surface_unmap_image (void *abstract_surface,
+ cairo_image_surface_t *image)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ D(fprintf(stderr, "q[%p] release_dest_image\n", abstract_surface));
+
+ if (!qs->image_equiv) {
+ struct _qimage_surface *qimage = (struct _qimage_surface *)image;
+
+ // XXX should I be using setBackgroundMode here instead of setCompositionMode?
+ if (qs->supports_porter_duff)
+ qs->p->setCompositionMode (QPainter::CompositionMode_Source);
+
+ qs->p->drawImage ((int)qimage->image.base.device_transform.x0,
+ (int)qimage->image.base.device_transform.y0,
+ *qimage->qimg,
+ (int)qimage->image.base.device_transform.x0,
+ (int)qimage->image.base.device_transform.y0,
+ (int)qimage->image.width,
+ (int)qimage->image.height);
+
+ if (qs->supports_porter_duff)
+ qs->p->setCompositionMode (QPainter::CompositionMode_SourceOver);
+
+ delete qimage->qimg;
+ }
+
+ cairo_surface_finish (&image->base);
+ cairo_surface_destroy (&image->base);
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static cairo_bool_t
+_cairo_qt_surface_get_extents (void *abstract_surface,
+ cairo_rectangle_int_t *extents)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ extents->x = qs->window.x();
+ extents->y = qs->window.y();
+ extents->width = qs->window.width();
+ extents->height = qs->window.height();
+
+ return TRUE;
+}
+
+static cairo_status_t
+_cairo_qt_surface_clipper_intersect_clip_path (cairo_surface_clipper_t *clipper,
+ cairo_path_fixed_t *path,
+ cairo_fill_rule_t fill_rule,
+ double tolerance,
+ cairo_antialias_t antialias)
+{
+ cairo_qt_surface_t *qs = cairo_container_of (clipper,
+ cairo_qt_surface_t,
+ clipper);
+
+ if (path == NULL) {
+ if (qs->pixmap || qs->image) {
+ // we own p
+ qs->p->setClipping (false);
+ } else {
+ qs->p->restore ();
+ qs->p->save ();
+ }
+ } else {
+ // XXX Antialiasing is ignored
+ qs->p->setClipPath (path_to_qt (path, fill_rule), Qt::IntersectClip);
+ }
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static void
+_cairo_qt_surface_set_clip_region (cairo_qt_surface_t *qs,
+ const cairo_region_t *clip_region)
+{
+ _cairo_surface_clipper_reset (&qs->clipper);
+
+ if (clip_region == NULL) {
+ // How the clip path is reset depends on whether we own p or not
+ if (qs->pixmap || qs->image) {
+ // we own p
+ qs->p->setClipping (false);
+ } else {
+ qs->p->restore ();
+ qs->p->save ();
+ }
+ } else {
+ QRegion qr;
+ int num_rects = cairo_region_num_rectangles (clip_region);
+ for (int i = 0; i < num_rects; ++i) {
+ cairo_rectangle_int_t rect;
+
+ cairo_region_get_rectangle (clip_region, i, &rect);
+
+ QRect r(rect.x, rect.y, rect.width, rect.height);
+ qr = qr.unite(r);
+ }
+
+ qs->p->setClipRegion (qr, Qt::IntersectClip);
+ }
+}
+
+static cairo_int_status_t
+_cairo_qt_surface_set_clip (cairo_qt_surface_t *qs,
+ const cairo_clip_t *clip)
+{
+ cairo_int_status_t status;
+
+ D(fprintf(stderr, "q[%p] intersect_clip_path %s\n", abstract_surface, path ? "(path)" : "(clear)"));
+
+ if (clip == NULL) {
+ _cairo_surface_clipper_reset (&qs->clipper);
+ // How the clip path is reset depends on whether we own p or not
+ if (qs->pixmap || qs->image) {
+ // we own p
+ qs->p->setClipping (false);
+ } else {
+ qs->p->restore ();
+ qs->p->save ();
+ }
+
+ return CAIRO_INT_STATUS_SUCCESS;
+ }
+
+#if ENABLE_FAST_CLIP
+ // Qt will implicitly enable clipping, and will use ReplaceClip
+ // instead of IntersectClip if clipping was disabled before
+
+ // Note: Qt is really bad at dealing with clip paths. It doesn't
+ // seem to usefully recognize rectangular paths, instead going down
+ // extremely slow paths whenever a clip path is set. So,
+ // we do a bunch of work here to try to get rectangles or regions
+ // down to Qt for clipping.
+
+ cairo_region_t *clip_region = NULL;
+
+ status = _cairo_clip_get_region (clip, &clip_region);
+ if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
+ // We weren't able to extract a region from the traps.
+ // Just hand the path down to QPainter.
+ status = (cairo_int_status_t)
+ _cairo_surface_clipper_set_clip (&qs->clipper, clip);
+ } else if (status == CAIRO_INT_STATUS_SUCCESS) {
+ _cairo_qt_surface_set_clip_region (qs, clip_region);
+ status = CAIRO_INT_STATUS_SUCCESS;
+ }
+#else
+ status = (cairo_int_status_t)
+ _cairo_surface_clipper_set_clip (&qs->clipper, clip);
+#endif
+
+ return status;
+}
+
+/*
+ * Brush conversion
+ */
+
+struct PatternToBrushConverter {
+ PatternToBrushConverter (const cairo_pattern_t *pattern)
+ __attribute__ ((noinline)) :
+ mAcquiredImageParent(0),
+ mAcquiredImage(0),
+ mAcquiredImageExtra(0)
+ {
+ if (pattern->type == CAIRO_PATTERN_TYPE_SOLID) {
+ cairo_solid_pattern_t *solid = (cairo_solid_pattern_t*) pattern;
+ QColor color;
+ color.setRgbF(solid->color.red,
+ solid->color.green,
+ solid->color.blue,
+ solid->color.alpha);
+
+ mBrush = QBrush(color);
+ } else if (pattern->type == CAIRO_PATTERN_TYPE_SURFACE) {
+ cairo_surface_pattern_t *spattern = (cairo_surface_pattern_t*) pattern;
+ cairo_surface_t *surface = spattern->surface;
+
+ if (surface->type == CAIRO_SURFACE_TYPE_QT) {
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t*) surface;
+
+ if (qs->image) {
+ mBrush = QBrush(*qs->image);
+ } else if (qs->pixmap) {
+ mBrush = QBrush(*qs->pixmap);
+ } else {
+ // do something smart
+ mBrush = QBrush(0xff0000ff);
+ }
+ } else {
+ cairo_image_surface_t *isurf = NULL;
+
+ if (surface->type == CAIRO_SURFACE_TYPE_IMAGE) {
+ isurf = (cairo_image_surface_t*) surface;
+ } else {
+ void *image_extra;
+
+ if (_cairo_surface_acquire_source_image (surface, &isurf, &image_extra) == CAIRO_STATUS_SUCCESS) {
+ mAcquiredImageParent = surface;
+ mAcquiredImage = isurf;
+ mAcquiredImageExtra = image_extra;
+ } else {
+ isurf = NULL;
+ }
+ }
+
+ if (isurf) {
+ mBrush = QBrush (QImage ((const uchar *) isurf->data,
+ isurf->width,
+ isurf->height,
+ isurf->stride,
+ _qimage_format_from_cairo_format (isurf->format)));
+ } else {
+ mBrush = QBrush(0x0000ffff);
+ }
+ }
+ } else if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR ||
+ pattern->type == CAIRO_PATTERN_TYPE_RADIAL)
+ {
+ QGradient *grad;
+ cairo_bool_t reverse_stops = FALSE;
+ cairo_bool_t emulate_reflect = FALSE;
+ double offset = 0.0;
+
+ cairo_extend_t extend = pattern->extend;
+
+ cairo_gradient_pattern_t *gpat = (cairo_gradient_pattern_t *) pattern;
+
+ if (pattern->type == CAIRO_PATTERN_TYPE_LINEAR) {
+ cairo_linear_pattern_t *lpat = (cairo_linear_pattern_t *) pattern;
+ grad = new QLinearGradient (lpat->pd1.x, lpat->pd1.y,
+ lpat->pd2.x, lpat->pd2.y);
+ } else if (pattern->type == CAIRO_PATTERN_TYPE_RADIAL) {
+ cairo_radial_pattern_t *rpat = (cairo_radial_pattern_t *) pattern;
+
+ /* Based on the SVG surface code */
+
+ cairo_circle_double_t *c0, *c1;
+ double x0, y0, r0, x1, y1, r1;
+
+ if (rpat->cd1.radius < rpat->cd2.radius) {
+ c0 = &rpat->cd1;
+ c1 = &rpat->cd2;
+ reverse_stops = FALSE;
+ } else {
+ c0 = &rpat->cd2;
+ c1 = &rpat->cd1;
+ reverse_stops = TRUE;
+ }
+
+ x0 = c0->center.x;
+ y0 = c0->center.y;
+ r0 = c0->radius;
+ x1 = c1->center.x;
+ y1 = c1->center.y;
+ r1 = c1->radius;
+
+ if (r0 == r1) {
+ grad = new QRadialGradient (x1, y1, r1, x1, y1);
+ } else {
+ double fx = (r1 * x0 - r0 * x1) / (r1 - r0);
+ double fy = (r1 * y0 - r0 * y1) / (r1 - r0);
+
+ /* QPainter doesn't support the inner circle and use instead a gradient focal.
+ * That means we need to emulate the cairo behaviour by processing the
+ * cairo gradient stops.
+ * The CAIRO_EXTENT_NONE and CAIRO_EXTENT_PAD modes are quite easy to handle,
+ * it's just a matter of stop position translation and calculation of
+ * the corresponding SVG radial gradient focal.
+ * The CAIRO_EXTENT_REFLECT and CAIRO_EXTEND_REPEAT modes require to compute a new
+ * radial gradient, with an new outer circle, equal to r1 - r0 in the CAIRO_EXTEND_REPEAT
+ * case, and 2 * (r1 - r0) in the CAIRO_EXTENT_REFLECT case, and a new gradient stop
+ * list that maps to the original cairo stop list.
+ */
+ if ((extend == CAIRO_EXTEND_REFLECT || extend == CAIRO_EXTEND_REPEAT) && r0 > 0.0) {
+ double r_org = r1;
+ double r, x, y;
+
+ if (extend == CAIRO_EXTEND_REFLECT) {
+ r1 = 2 * r1 - r0;
+ emulate_reflect = TRUE;
+ }
+
+ offset = fmod (r1, r1 - r0) / (r1 - r0) - 1.0;
+ r = r1 - r0;
+
+ /* New position of outer circle. */
+ x = r * (x1 - fx) / r_org + fx;
+ y = r * (y1 - fy) / r_org + fy;
+
+ x1 = x;
+ y1 = y;
+ r1 = r;
+ r0 = 0.0;
+ } else {
+ offset = r0 / r1;
+ }
+
+ grad = new QRadialGradient (x1, y1, r1, fx, fy);
+
+ if (extend == CAIRO_EXTEND_NONE && r0 != 0.0)
+ grad->setColorAt (r0 / r1, Qt::transparent);
+ }
+ }
+
+ switch (extend) {
+ case CAIRO_EXTEND_NONE:
+ case CAIRO_EXTEND_PAD:
+ grad->setSpread(QGradient::PadSpread);
+
+ grad->setColorAt (0.0, Qt::transparent);
+ grad->setColorAt (1.0, Qt::transparent);
+ break;
+
+ case CAIRO_EXTEND_REFLECT:
+ grad->setSpread(QGradient::ReflectSpread);
+ break;
+
+ case CAIRO_EXTEND_REPEAT:
+ grad->setSpread(QGradient::RepeatSpread);
+ break;
+ }
+
+ for (unsigned int i = 0; i < gpat->n_stops; i++) {
+ int index = i;
+ if (reverse_stops)
+ index = gpat->n_stops - i - 1;
+
+ double offset = gpat->stops[i].offset;
+ QColor color;
+ color.setRgbF (gpat->stops[i].color.red,
+ gpat->stops[i].color.green,
+ gpat->stops[i].color.blue,
+ gpat->stops[i].color.alpha);
+
+ if (emulate_reflect) {
+ offset = offset / 2.0;
+ grad->setColorAt (1.0 - offset, color);
+ }
+
+ grad->setColorAt (offset, color);
+ }
+
+ mBrush = QBrush(*grad);
+
+ delete grad;
+ }
+
+ if (mBrush.style() != Qt::NoBrush &&
+ pattern->type != CAIRO_PATTERN_TYPE_SOLID &&
+ ! _cairo_matrix_is_identity (&pattern->matrix))
+ {
+ cairo_matrix_t pm = pattern->matrix;
+ cairo_status_t status = cairo_matrix_invert (&pm);
+ assert (status == CAIRO_STATUS_SUCCESS);
+ mBrush.setMatrix (_qmatrix_from_cairo_matrix (pm));
+ }
+ }
+
+ ~PatternToBrushConverter () __attribute__ ((noinline)){
+ if (mAcquiredImageParent)
+ _cairo_surface_release_source_image (mAcquiredImageParent, mAcquiredImage, mAcquiredImageExtra);
+ }
+
+ operator QBrush& () {
+ return mBrush;
+ }
+
+ QBrush mBrush;
+
+ private:
+ cairo_surface_t *mAcquiredImageParent;
+ cairo_image_surface_t *mAcquiredImage;
+ void *mAcquiredImageExtra;
+};
+
+struct PatternToPenConverter {
+ PatternToPenConverter (const cairo_pattern_t *source,
+ const cairo_stroke_style_t *style) :
+ mBrushConverter(source)
+ {
+ Qt::PenJoinStyle join = Qt::MiterJoin;
+ Qt::PenCapStyle cap = Qt::SquareCap;
+
+ switch (style->line_cap) {
+ case CAIRO_LINE_CAP_BUTT:
+ cap = Qt::FlatCap;
+ break;
+ case CAIRO_LINE_CAP_ROUND:
+ cap = Qt::RoundCap;
+ break;
+ case CAIRO_LINE_CAP_SQUARE:
+ cap = Qt::SquareCap;
+ break;
+ }
+
+ switch (style->line_join) {
+ case CAIRO_LINE_JOIN_MITER:
+ join = Qt::MiterJoin;
+ break;
+ case CAIRO_LINE_JOIN_ROUND:
+ join = Qt::RoundJoin;
+ break;
+ case CAIRO_LINE_JOIN_BEVEL:
+ join = Qt::BevelJoin;
+ break;
+ }
+
+ mPen = QPen(mBrushConverter, style->line_width, Qt::SolidLine, cap, join);
+ mPen.setMiterLimit (style->miter_limit);
+
+ if (style->dash && style->num_dashes) {
+ Qt::PenStyle pstyle = Qt::NoPen;
+
+ if (style->num_dashes == 2) {
+ if ((style->dash[0] == style->line_width &&
+ style->dash[1] == style->line_width && style->line_width <= 2.0) ||
+ (style->dash[0] == 0.0 &&
+ style->dash[1] == style->line_width * 2 && cap == Qt::RoundCap))
+ {
+ pstyle = Qt::DotLine;
+ } else if (style->dash[0] == style->line_width * DASH_LENGTH &&
+ style->dash[1] == style->line_width * DASH_LENGTH &&
+ cap == Qt::FlatCap)
+ {
+ pstyle = Qt::DashLine;
+ }
+ }
+
+ if (pstyle != Qt::NoPen) {
+ mPen.setStyle(pstyle);
+ return;
+ }
+
+ unsigned int odd_dash = style->num_dashes % 2;
+
+ QVector<qreal> dashes (odd_dash ? style->num_dashes * 2 : style->num_dashes);
+ for (unsigned int i = 0; i < odd_dash+1; i++) {
+ for (unsigned int j = 0; j < style->num_dashes; j++) {
+ // In Qt, the dash lengths are given in units of line width, whereas
+ // in cairo, they are in user-space units. We'll always apply the CTM,
+ // so all we have to do here is divide cairo's dash lengths by the line
+ // width.
+ dashes.append (style->dash[j] / style->line_width);
+ }
+ }
+
+ mPen.setDashPattern(dashes);
+ mPen.setDashOffset(style->dash_offset / style->line_width);
+ }
+ }
+
+ ~PatternToPenConverter() { }
+
+ operator QPen& () {
+ return mPen;
+ }
+
+ QPen mPen;
+ PatternToBrushConverter mBrushConverter;
+};
+
+/*
+ * Core drawing operations
+ */
+
+static bool
+_cairo_qt_fast_fill (cairo_qt_surface_t *qs,
+ const cairo_pattern_t *source,
+ const cairo_path_fixed_t *path = NULL,
+ cairo_fill_rule_t fill_rule = CAIRO_FILL_RULE_WINDING,
+ double tolerance = 0.0,
+ cairo_antialias_t antialias = CAIRO_ANTIALIAS_NONE)
+{
+#if ENABLE_FAST_FILL
+ QImage *qsSrc_image = NULL;
+ QPixmap *qsSrc_pixmap = NULL;
+ std::auto_ptr<QImage> qsSrc_image_d;
+
+
+ if (source->type == CAIRO_PATTERN_TYPE_SURFACE) {
+ cairo_surface_pattern_t *spattern = (cairo_surface_pattern_t*) source;
+ if (spattern->surface->type == CAIRO_SURFACE_TYPE_QT) {
+ cairo_qt_surface_t *p = (cairo_qt_surface_t*) spattern->surface;
+
+ qsSrc_image = p->image;
+ qsSrc_pixmap = p->pixmap;
+ } else if (spattern->surface->type == CAIRO_SURFACE_TYPE_IMAGE) {
+ cairo_image_surface_t *p = (cairo_image_surface_t*) spattern->surface;
+ qsSrc_image = new QImage((const uchar*) p->data,
+ p->width,
+ p->height,
+ p->stride,
+ _qimage_format_from_cairo_format(p->format));
+ qsSrc_image_d.reset(qsSrc_image);
+ }
+ }
+
+ if (!qsSrc_image && !qsSrc_pixmap)
+ return false;
+
+ // We can only drawTiledPixmap; there's no drawTiledImage
+ if (! qsSrc_pixmap &&
+ (source->extend == CAIRO_EXTEND_REPEAT ||
+ source->extend == CAIRO_EXTEND_REFLECT))
+ {
+ return false;
+ }
+
+ QMatrix sourceMatrix = _qmatrix_from_cairo_matrix (source->matrix);
+
+ // We can draw this faster by clipping and calling drawImage/drawPixmap.
+ // Use our own clipping function so that we can get the
+ // region handling to end up with the fastest possible clip.
+ //
+ // XXX Antialiasing will fail pretty hard here, since we can't clip with AA
+ // with QPainter.
+ qs->p->save();
+
+ if (path) {
+ cairo_int_status_t status;
+
+ cairo_clip_t clip, old_clip = qs->clipper.clip;
+
+ _cairo_clip_init_copy (&clip, &qs->clipper.clip);
+ status = (cairo_int_status_t) _cairo_clip_clip (&clip,
+ path,
+ fill_rule,
+ tolerance,
+ antialias);
+ if (unlikely (status)) {
+ qs->p->restore();
+ return false;
+ }
+
+ status = _cairo_qt_surface_set_clip (qs, &clip);
+ if (unlikely (status)) {
+ qs->p->restore();
+ return false;
+ }
+
+ _cairo_clip_reset (&clip);
+ qs->clipper.clip = old_clip;
+ }
+
+ qs->p->setWorldMatrix (sourceMatrix.inverted(), true);
+
+ switch (source->extend) {
+ case CAIRO_EXTEND_REPEAT:
+ // XXX handle reflect by tiling 4 times first
+ case CAIRO_EXTEND_REFLECT: {
+ assert (qsSrc_pixmap);
+
+ // Render the tiling to cover the entire destination window (because
+ // it'll be clipped). Transform the window rect by the inverse
+ // of the current world transform so that the device coordinates
+ // end up as the right thing.
+ QRectF dest = qs->p->worldTransform().inverted().mapRect(QRectF(qs->window));
+ QPointF origin = sourceMatrix.map(QPointF(0.0, 0.0));
+
+ qs->p->drawTiledPixmap (dest, *qsSrc_pixmap, origin);
+ }
+ break;
+ case CAIRO_EXTEND_NONE:
+ case CAIRO_EXTEND_PAD: // XXX not exactly right, but good enough
+ default:
+ if (qsSrc_image)
+ qs->p->drawImage (0, 0, *qsSrc_image);
+ else if (qsSrc_pixmap)
+ qs->p->drawPixmap (0, 0, *qsSrc_pixmap);
+ break;
+ }
+
+ qs->p->restore();
+
+ return true;
+#else
+ return false;
+#endif
+}
+
+static cairo_int_status_t
+_cairo_qt_surface_paint (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_clip_t *clip)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+ cairo_int_status_t status;
+
+ D(fprintf(stderr, "q[%p] paint op:%s\n", abstract_surface, _opstr(op)));
+
+ if (! _op_is_supported (qs, op))
+ return _cairo_surface_fallback_paint (abstract_surface, op, source, clip);
+
+ status = _cairo_qt_surface_set_clip (qs, clip);
+ if (unlikely (status))
+ return status;
+
+ if (qs->supports_porter_duff)
+ qs->p->setCompositionMode (_qpainter_compositionmode_from_cairo_op (op));
+
+ if (! _cairo_qt_fast_fill (qs, source)) {
+ PatternToBrushConverter brush (source);
+ qs->p->fillRect (qs->window, brush);
+ }
+
+ if (qs->supports_porter_duff)
+ qs->p->setCompositionMode (QPainter::CompositionMode_SourceOver);
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_qt_surface_fill (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_path_fixed_t *path,
+ cairo_fill_rule_t fill_rule,
+ double tolerance,
+ cairo_antialias_t antialias,
+ const cairo_clip_t *clip)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ D(fprintf(stderr, "q[%p] fill op:%s\n", abstract_surface, _opstr(op)));
+
+ if (! _op_is_supported (qs, op))
+ return _cairo_surface_fallback_fill (abstract_surface, op,
+ source, path, fill_rule,
+ tolerance, antialias, clip);
+
+ cairo_int_status_t status = _cairo_qt_surface_set_clip (qs, clip);
+ if (unlikely (status))
+ return status;
+
+ if (qs->supports_porter_duff)
+ qs->p->setCompositionMode (_qpainter_compositionmode_from_cairo_op (op));
+
+ // XXX Qt4.3, 4.4 misrenders some complex paths if antialiasing is
+ // enabled
+ //qs->p->setRenderHint (QPainter::Antialiasing, antialias == CAIRO_ANTIALIAS_NONE ? false : true);
+ qs->p->setRenderHint (QPainter::SmoothPixmapTransform, source->filter != CAIRO_FILTER_FAST);
+
+ if (! _cairo_qt_fast_fill (qs, source,
+ path, fill_rule, tolerance, antialias))
+ {
+ PatternToBrushConverter brush(source);
+ qs->p->fillPath (path_to_qt (path, fill_rule), brush);
+ }
+
+ if (qs->supports_porter_duff)
+ qs->p->setCompositionMode (QPainter::CompositionMode_SourceOver);
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_qt_surface_stroke (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_path_fixed_t *path,
+ const cairo_stroke_style_t *style,
+ const cairo_matrix_t *ctm,
+ const cairo_matrix_t *ctm_inverse,
+ double tolerance,
+ cairo_antialias_t antialias,
+ const cairo_clip_t *clip)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ D(fprintf(stderr, "q[%p] stroke op:%s\n", abstract_surface, _opstr(op)));
+
+ if (! _op_is_supported (qs, op))
+ return _cairo_surface_fallback_stroke (abstract_surface, op,
+ source, path, style, ctm,
+ ctm_inverse, tolerance,
+ antialias, clip);
+
+ cairo_int_status_t int_status = _cairo_qt_surface_set_clip (qs, clip);
+ if (unlikely (int_status))
+ return int_status;
+
+ QMatrix savedMatrix = qs->p->worldMatrix();
+
+ if (qs->supports_porter_duff)
+ qs->p->setCompositionMode (_qpainter_compositionmode_from_cairo_op (op));
+
+ qs->p->setWorldMatrix (_qmatrix_from_cairo_matrix (*ctm), true);
+ // XXX Qt4.3, 4.4 misrenders some complex paths if antialiasing is
+ // enabled
+ //qs->p->setRenderHint (QPainter::Antialiasing, antialias == CAIRO_ANTIALIAS_NONE ? false : true);
+ qs->p->setRenderHint (QPainter::SmoothPixmapTransform, source->filter != CAIRO_FILTER_FAST);
+
+ PatternToPenConverter pen(source, style);
+
+ qs->p->setPen(pen);
+ qs->p->drawPath(path_to_qt (path, ctm_inverse));
+ qs->p->setPen(Qt::black);
+
+ qs->p->setWorldMatrix (savedMatrix, false);
+
+ if (qs->supports_porter_duff)
+ qs->p->setCompositionMode (QPainter::CompositionMode_SourceOver);
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_qt_surface_show_glyphs (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ cairo_glyph_t *glyphs,
+ int num_glyphs,
+ cairo_scaled_font_t *scaled_font,
+ const cairo_clip_t *clip)
+{
+#if ((QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)) || defined(QT_GLYPHS_API_BACKPORT)) && 0
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ // pick out the colour to use from the cairo source
+ cairo_solid_pattern_t *solid = (cairo_solid_pattern_t*) source;
+ cairo_scaled_glyph_t* glyph;
+ // documentation says you have to freeze the cache, but I don't believe it
+ _cairo_scaled_font_freeze_cache(scaled_font);
+
+ QColor tempColour(solid->color.red * 255, solid->color.green * 255, solid->color.blue * 255);
+ QVarLengthArray<QPointF> positions(num_glyphs);
+ QVarLengthArray<unsigned int> glyphss(num_glyphs);
+ FT_Face face = cairo_ft_scaled_font_lock_face (scaled_font);
+ const FT_Size_Metrics& ftMetrics = face->size->metrics;
+ QFont font(face->family_name);
+ font.setStyleStrategy(QFont::NoFontMerging);
+ font.setBold(face->style_flags & FT_STYLE_FLAG_BOLD);
+ font.setItalic(face->style_flags & FT_STYLE_FLAG_ITALIC);
+ font.setKerning(face->face_flags & FT_FACE_FLAG_KERNING);
+ font.setPixelSize(ftMetrics.y_ppem);
+ cairo_ft_scaled_font_unlock_face(scaled_font);
+ qs->p->setFont(font);
+ qs->p->setPen(tempColour);
+ for (int currentGlyph = 0; currentGlyph < num_glyphs; currentGlyph++) {
+ positions[currentGlyph].setX(glyphs[currentGlyph].x);
+ positions[currentGlyph].setY(glyphs[currentGlyph].y);
+ glyphss[currentGlyph] = glyphs[currentGlyph].index;
+ }
+ qt_draw_glyphs(qs->p, glyphss.data(), positions.data(), num_glyphs);
+ _cairo_scaled_font_thaw_cache(scaled_font);
+ return CAIRO_INT_STATUS_SUCCESS;
+#else
+ return _cairo_surface_fallback_glyphs (abstract_surface, op,
+ source, glyphs, num_glyphs,
+ scaled_font, clip);
+#endif
+}
+
+static cairo_int_status_t
+_cairo_qt_surface_mask (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_pattern_t *mask,
+ const cairo_clip_t *clip)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ D(fprintf(stderr, "q[%p] mask op:%s\n", abstract_surface, _opstr(op)));
+
+ if (qs->p && mask->type == CAIRO_PATTERN_TYPE_SOLID) {
+ cairo_solid_pattern_t *solid_mask = (cairo_solid_pattern_t *) mask;
+ cairo_int_status_t result;
+
+ qs->p->setOpacity (solid_mask->color.alpha);
+
+ result = _cairo_qt_surface_paint (abstract_surface, op, source, clip);
+
+ qs->p->setOpacity (1.0);
+
+ return result;
+ }
+
+ // otherwise skip for now
+ return _cairo_surface_fallback_mask (abstract_surface, op, source, mask, clip);
+}
+
+static cairo_status_t
+_cairo_qt_surface_mark_dirty (void *abstract_surface,
+ int x, int y,
+ int width, int height)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t *) abstract_surface;
+
+ if (qs->p && !(qs->image || qs->pixmap))
+ qs->p->save ();
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+/*
+ * Backend struct
+ */
+
+static const cairo_surface_backend_t cairo_qt_surface_backend = {
+ CAIRO_SURFACE_TYPE_QT,
+ _cairo_qt_surface_finish,
+
+ _cairo_default_context_create, /* XXX */
+
+ _cairo_qt_surface_create_similar,
+ NULL, /* similar image */
+ _cairo_qt_surface_map_to_image,
+ _cairo_qt_surface_unmap_image,
+
+ _cairo_surface_default_source,
+ _cairo_qt_surface_acquire_source_image,
+ _cairo_qt_surface_release_source_image,
+ NULL, /* snapshot */
+
+ NULL, /* copy_page */
+ NULL, /* show_page */
+
+ _cairo_qt_surface_get_extents,
+ NULL, /* get_font_options */
+
+ NULL, /* flush */
+ _cairo_qt_surface_mark_dirty,
+
+ _cairo_qt_surface_paint,
+ _cairo_qt_surface_mask,
+ _cairo_qt_surface_stroke,
+ _cairo_qt_surface_fill,
+ NULL, /* fill_stroke */
+ _cairo_qt_surface_show_glyphs
+};
+
+cairo_surface_t *
+cairo_qt_surface_create (QPainter *painter)
+{
+ cairo_qt_surface_t *qs;
+
+ qs = (cairo_qt_surface_t *) malloc (sizeof(cairo_qt_surface_t));
+ if (qs == NULL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ memset (qs, 0, sizeof(cairo_qt_surface_t));
+
+ _cairo_surface_init (&qs->base,
+ &cairo_qt_surface_backend,
+ NULL, /* device */
+ CAIRO_CONTENT_COLOR_ALPHA);
+
+ _cairo_surface_clipper_init (&qs->clipper,
+ _cairo_qt_surface_clipper_intersect_clip_path);
+
+ qs->p = painter;
+ if (qs->p->paintEngine())
+ qs->supports_porter_duff = qs->p->paintEngine()->hasFeature(QPaintEngine::PorterDuff);
+ else
+ qs->supports_porter_duff = FALSE;
+
+ // Save so that we can always get back to the original state
+ qs->p->save();
+
+ qs->window = painter->window();
+
+ D(fprintf(stderr, "qpainter_surface_create: window: [%d %d %d %d] pd:%d\n",
+ qs->window.x(), qs->window.y(), qs->window.width(), qs->window.height(),
+ qs->supports_porter_duff));
+
+ return &qs->base;
+}
+
+cairo_surface_t *
+cairo_qt_surface_create_with_qimage (cairo_format_t format,
+ int width,
+ int height)
+{
+ cairo_qt_surface_t *qs;
+
+ qs = (cairo_qt_surface_t *) malloc (sizeof(cairo_qt_surface_t));
+ if (qs == NULL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ memset (qs, 0, sizeof(cairo_qt_surface_t));
+
+ _cairo_surface_init (&qs->base,
+ &cairo_qt_surface_backend,
+ NULL, /* device */
+ _cairo_content_from_format (format));
+
+ _cairo_surface_clipper_init (&qs->clipper,
+ _cairo_qt_surface_clipper_intersect_clip_path);
+
+
+ QImage *image = new QImage (width, height,
+ _qimage_format_from_cairo_format (format));
+
+ qs->image = image;
+
+ if (!image->isNull()) {
+ qs->p = new QPainter(image);
+ qs->supports_porter_duff = qs->p->paintEngine()->hasFeature(QPaintEngine::PorterDuff);
+ }
+
+ qs->image_equiv = cairo_image_surface_create_for_data (image->bits(),
+ format,
+ width, height,
+ image->bytesPerLine());
+
+ qs->window = QRect(0, 0, width, height);
+
+ D(fprintf(stderr, "qpainter_surface_create: qimage: [%d %d %d %d] pd:%d\n",
+ qs->window.x(), qs->window.y(), qs->window.width(), qs->window.height(),
+ qs->supports_porter_duff));
+
+ return &qs->base;
+}
+
+cairo_surface_t *
+cairo_qt_surface_create_with_qpixmap (cairo_content_t content,
+ int width,
+ int height)
+{
+ cairo_qt_surface_t *qs;
+
+ if ((content & CAIRO_CONTENT_COLOR) == 0)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_CONTENT));
+
+ qs = (cairo_qt_surface_t *) malloc (sizeof(cairo_qt_surface_t));
+ if (qs == NULL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ memset (qs, 0, sizeof(cairo_qt_surface_t));
+
+ QPixmap *pixmap = new QPixmap (width, height);
+ if (pixmap == NULL) {
+ free (qs);
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+ }
+
+ // By default, a QPixmap is opaque; however, if it's filled
+ // with a color with a transparency component, it is converted
+ // to a format that preserves transparency.
+ if (content == CAIRO_CONTENT_COLOR_ALPHA)
+ pixmap->fill(Qt::transparent);
+
+ _cairo_surface_init (&qs->base,
+ &cairo_qt_surface_backend,
+ NULL, /* device */
+ content);
+
+ _cairo_surface_clipper_init (&qs->clipper,
+ _cairo_qt_surface_clipper_intersect_clip_path);
+
+ qs->pixmap = pixmap;
+
+ if (!pixmap->isNull()) {
+ qs->p = new QPainter(pixmap);
+ qs->supports_porter_duff = qs->p->paintEngine()->hasFeature(QPaintEngine::PorterDuff);
+ }
+
+ qs->window = QRect(0, 0, width, height);
+
+ D(fprintf(stderr, "qpainter_surface_create: qpixmap: [%d %d %d %d] pd:%d\n",
+ qs->window.x(), qs->window.y(), qs->window.width(), qs->window.height(),
+ qs->supports_porter_duff));
+
+ return &qs->base;
+}
+
+/**
+ * _cairo_surface_is_qt:
+ * @surface: a #cairo_surface_t
+ *
+ * Checks if a surface is a #cairo_qt_surface_t
+ *
+ * Return value: True if the surface is an qt surface
+ **/
+static inline cairo_bool_t
+_cairo_surface_is_qt (cairo_surface_t *surface)
+{
+ return surface->backend == &cairo_qt_surface_backend;
+}
+
+QPainter *
+cairo_qt_surface_get_qpainter (cairo_surface_t *surface)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t*) surface;
+
+ /* Throw an error for a non-qt surface */
+ if (! _cairo_surface_is_qt (surface)) {
+ _cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
+ return NULL;
+ }
+
+ return qs->p;
+}
+
+QImage *
+cairo_qt_surface_get_qimage (cairo_surface_t *surface)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t*) surface;
+
+ /* Throw an error for a non-qt surface */
+ if (! _cairo_surface_is_qt (surface)) {
+ _cairo_error_throw (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
+ return NULL;
+ }
+
+ return qs->image;
+}
+
+cairo_surface_t *
+cairo_qt_surface_get_image (cairo_surface_t *surface)
+{
+ cairo_qt_surface_t *qs = (cairo_qt_surface_t*) surface;
+
+ /* Throw an error for a non-qt surface */
+ if (! _cairo_surface_is_qt (surface)) {
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
+ }
+
+ return qs->image_equiv;
+}
+
+/*
+ * TODO:
+ *
+ * - Figure out why QBrush isn't working with non-repeated images
+ *
+ * - Correct repeat mode; right now, every surface source is EXTEND_REPEAT
+ * - implement EXTEND_NONE (?? probably need to clip to the extents of the source)
+ * - implement EXTEND_REFLECT (create temporary and copy 4x, then EXTEND_REPEAT that)
+ *
+ * - stroke-image failure
+ *
+ * - Implement mask() with non-solid masks (probably will need to use a temporary and use IN)
+ *
+ * - Implement gradient sources
+ *
+ * - Make create_similar smarter -- create QPixmaps in more circumstances
+ * (e.g. if the pixmap can have alpha)
+ *
+ * - Implement show_glyphs() in terms of Qt
+ *
+ */