зеркало из https://github.com/mozilla/pjs.git
add missing file from cairo trunk
This commit is contained in:
cbiesinger%web.de
Родитель
327c8be016
Коммит
006654ad37
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@ -0,0 +1,901 @@
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/* vim:set ts=8 sw=4 noet cin: */
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/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2005 Christian Biesinger <cbiesinger@web.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is Christian Biesinger
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* <cbiesinger@web.de>
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*
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* Contributor(s):
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*/
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// This is a C++ file in order to use the C++ BeOS API
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#include <new>
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#include <Bitmap.h>
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#include <Region.h>
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#if 0
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#include <DirectWindow.h>
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#endif
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#include <Screen.h>
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#include <Window.h>
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#include <Locker.h>
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#include "cairoint.h"
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#include "cairo-beos.h"
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#define CAIRO_INT_STATUS_SUCCESS (cairo_int_status_t)(CAIRO_STATUS_SUCCESS)
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struct cairo_beos_surface_t {
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cairo_surface_t base;
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BView* view;
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/*
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* A view is either attached to a bitmap, a window, or unattached.
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* If it is attached to a window, we can copy data out of it using BScreen.
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* If it is attached to a bitmap, we can read the bitmap data.
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* If it is not attached, it doesn't draw anything, we need not bother.
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*
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* Since there doesn't seem to be a way to get the bitmap from a view if it
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* is attached to one, we have to use a special surface creation function.
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*/
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BBitmap* bitmap;
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};
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class AutoLockView {
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public:
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AutoLockView(BView* view) : mView(view) {
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mOK = mView->LockLooper();
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}
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~AutoLockView() {
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if (mOK)
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mView->UnlockLooper();
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}
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operator bool() {
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return mOK;
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}
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private:
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BView* mView;
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bool mOK;
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};
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static BRect
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_cairo_rect_to_brect (const cairo_rectangle_t* rect)
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{
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// A BRect is one pixel wider than you'd think
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return BRect(rect->x, rect->y, rect->x + rect->width - 1,
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rect->y + rect->height - 1);
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}
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static cairo_rectangle_t
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_brect_to_cairo_rect (const BRect& rect)
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{
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cairo_rectangle_t retval;
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retval.x = int(rect.left + 0.5);
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retval.y = int(rect.top + 0.5);
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retval.width = rect.IntegerWidth() + 1;
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retval.height = rect.IntegerHeight() + 1;
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return retval;
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}
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static rgb_color
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_cairo_color_to_be_color (const cairo_color_t* color)
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{
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// This factor ensures a uniform distribution of numbers
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const float factor = 256 - 1e-5;
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// Using doubles to have non-premultiplied colors
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rgb_color be_color = { uint8(color->red * factor),
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uint8(color->green * factor),
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uint8(color->blue * factor),
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uint8(color->alpha * factor) };
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return be_color;
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}
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enum ViewCopyStatus {
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OK,
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NOT_VISIBLE, // The view or the interest rect is not visible on screen
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ERROR // The view was visible, but the rect could not be copied. Probably OOM
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};
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/**
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* _cairo_beos_view_to_bitmap:
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* @bitmap: [out] The resulting bitmap.
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* @rect: [out] The rectangle that was copied, in the view's coordinate system
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* @interestRect: If non-null, only this part of the view will be copied (view's coord system).
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*
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* Gets the contents of the view as a BBitmap*. Caller must delete the bitmap.
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**/
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static ViewCopyStatus
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_cairo_beos_view_to_bitmap (BView* view,
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BBitmap** bitmap,
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BRect* rect = NULL,
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const BRect* interestRect = NULL)
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{
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*bitmap = NULL;
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BWindow* wnd = view->Window();
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// If we have no window, can't do anything
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if (!wnd)
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return NOT_VISIBLE;
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view->Sync();
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wnd->Sync();
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#if 0
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// Is it a direct window?
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BDirectWindow* directWnd = dynamic_cast<BDirectWindow*>(wnd);
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if (directWnd) {
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// WRITEME
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}
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#endif
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// Is it visible? If so, we can copy the content off the screen
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if (wnd->IsHidden())
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return NOT_VISIBLE;
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BRect rectToCopy(view->Bounds());
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if (interestRect)
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rectToCopy = rectToCopy & *interestRect;
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if (!rectToCopy.IsValid())
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return NOT_VISIBLE;
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BScreen screen(wnd);
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BRect screenRect(view->ConvertToScreen(rectToCopy));
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screenRect = screenRect & screen.Frame();
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if (!screen.IsValid())
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return NOT_VISIBLE;
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if (rect)
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*rect = view->ConvertFromScreen(screenRect);
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if (screen.GetBitmap(bitmap, false, &screenRect) == B_OK)
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return OK;
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return ERROR;
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}
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inline unsigned char
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unpremultiply (unsigned char color,
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unsigned char alpha)
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{
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if (alpha == 0)
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return 0;
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// plus alpha/2 to round instead of truncate
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return (color * 255 + alpha / 2) / alpha;
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}
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inline unsigned char
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premultiply (unsigned char color,
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unsigned char alpha)
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{
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// + 127 to round, instead of truncate
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return (color * alpha + 127) / 255;
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}
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/**
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* unpremultiply_rgba:
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*
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* Takes an input in ABGR premultiplied image data and unmultiplies it.
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* The result is stored in retdata.
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**/
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static void
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unpremultiply_rgba (unsigned char* data,
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int width,
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int height,
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int stride,
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unsigned char* retdata)
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{
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unsigned char* end = data + stride * height;
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for (unsigned char* in = data, *out = retdata;
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in < end;
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in += stride, out += stride)
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{
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for (int i = 0; i < width; ++i) {
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// XXX for a big-endian platform this'd have to change
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int idx = 4 * i;
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unsigned char alpha = in[idx + 3];
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out[idx + 0] = unpremultiply(in[idx + 0], alpha); // B
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out[idx + 1] = unpremultiply(in[idx + 1], alpha); // G
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out[idx + 2] = unpremultiply(in[idx + 2], alpha); // R
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out[idx + 3] = in[idx + 3]; // Alpha
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}
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}
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}
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/**
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* premultiply_rgba:
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*
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* Takes an input in ABGR non-premultiplied image data and premultiplies it.
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* The returned data must be freed with free().
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**/
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static unsigned char*
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premultiply_rgba (unsigned char* data,
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int width,
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int height,
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int stride)
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{
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unsigned char* retdata = reinterpret_cast<unsigned char*>(malloc(stride * height));
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if (!retdata)
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return NULL;
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unsigned char* end = data + stride * height;
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for (unsigned char* in = data, *out = retdata;
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in < end;
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in += stride, out += stride)
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{
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for (int i = 0; i < width; ++i) {
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// XXX for a big-endian platform this'd have to change
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int idx = 4 * i;
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unsigned char alpha = in[idx + 3];
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out[idx + 0] = premultiply(in[idx + 0], alpha); // B
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out[idx + 1] = premultiply(in[idx + 1], alpha); // G
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out[idx + 2] = premultiply(in[idx + 2], alpha); // R
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out[idx + 3] = in[idx + 3]; // Alpha
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}
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}
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return retdata;
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}
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/**
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* _cairo_beos_bitmap_to_surface:
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*
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* Returns an addrefed image surface for a BBitmap. The bitmap need not outlive
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* the surface.
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**/
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static cairo_image_surface_t*
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_cairo_beos_bitmap_to_surface (BBitmap* bitmap)
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{
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color_space format = bitmap->ColorSpace();
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if (format != B_RGB32 && format != B_RGBA32) {
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BBitmap bmp(bitmap->Bounds(), B_RGB32, true);
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BView view(bitmap->Bounds(), "Cairo bitmap drawing view",
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B_FOLLOW_ALL_SIDES, 0);
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bmp.AddChild(&view);
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view.LockLooper();
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view.DrawBitmap(bitmap, BPoint(0.0, 0.0));
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view.Sync();
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cairo_image_surface_t* imgsurf = _cairo_beos_bitmap_to_surface(&bmp);
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view.UnlockLooper();
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bmp.RemoveChild(&view);
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return imgsurf;
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}
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cairo_format_t cformat = format == B_RGB32 ? CAIRO_FORMAT_RGB24
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: CAIRO_FORMAT_ARGB32;
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BRect bounds(bitmap->Bounds());
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unsigned char* bits = reinterpret_cast<unsigned char*>(bitmap->Bits());
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int width = bounds.IntegerWidth() + 1;
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int height = bounds.IntegerHeight() + 1;
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unsigned char* premultiplied;
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if (cformat == CAIRO_FORMAT_ARGB32) {
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premultiplied = premultiply_rgba(bits, width, height,
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bitmap->BytesPerRow());
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} else {
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premultiplied = reinterpret_cast<unsigned char*>(
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malloc(bitmap->BytesPerRow() * height));
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if (premultiplied)
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memcpy(premultiplied, bits, bitmap->BytesPerRow() * height);
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}
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if (!premultiplied)
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return NULL;
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cairo_image_surface_t* surf = reinterpret_cast<cairo_image_surface_t*>
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(cairo_image_surface_create_for_data(premultiplied,
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cformat,
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width,
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height,
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bitmap->BytesPerRow()));
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if (surf->base.status)
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free(premultiplied);
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else
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_cairo_image_surface_assume_ownership_of_data(surf);
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return surf;
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}
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/**
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* _cairo_image_surface_to_bitmap:
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*
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* Converts an image surface to a BBitmap. The return value must be freed with
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* delete.
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**/
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static BBitmap*
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_cairo_image_surface_to_bitmap (cairo_image_surface_t* surface)
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{
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BRect size(0.0, 0.0, surface->width - 1, surface->height - 1);
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switch (surface->format) {
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case CAIRO_FORMAT_ARGB32: {
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BBitmap* data = new BBitmap(size, B_RGBA32);
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unpremultiply_rgba(surface->data,
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surface->width,
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surface->height,
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surface->stride,
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reinterpret_cast<unsigned char*>(data->Bits()));
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return data;
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}
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case CAIRO_FORMAT_RGB24: {
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BBitmap* data = new BBitmap(size, B_RGB32);
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memcpy(data->Bits(), surface->data, surface->height * surface->stride);
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return data;
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}
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default:
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return NULL;
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}
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}
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/**
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* _cairo_op_to_be_op:
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*
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* Converts a cairo drawing operator to a beos drawing_mode. Returns true if
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* the operator could be converted, false otherwise.
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**/
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static bool
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_cairo_op_to_be_op (cairo_operator_t cairo_op,
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drawing_mode* beos_op)
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{
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switch (cairo_op) {
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case CAIRO_OPERATOR_SOURCE:
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*beos_op = B_OP_COPY;
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return true;
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case CAIRO_OPERATOR_OVER:
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*beos_op = B_OP_ALPHA;
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return true;
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case CAIRO_OPERATOR_ADD:
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// Does not actually work
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#if 1
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return false;
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#else
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*beos_op = B_OP_ADD;
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return true;
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#endif
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case CAIRO_OPERATOR_CLEAR:
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// Does not map to B_OP_ERASE - it replaces the dest with the low
|
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// color, instead of transparency; could be done by setting low
|
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// color appropriately.
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case CAIRO_OPERATOR_IN:
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case CAIRO_OPERATOR_OUT:
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case CAIRO_OPERATOR_ATOP:
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case CAIRO_OPERATOR_DEST:
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case CAIRO_OPERATOR_DEST_OVER:
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case CAIRO_OPERATOR_DEST_IN:
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case CAIRO_OPERATOR_DEST_OUT:
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case CAIRO_OPERATOR_DEST_ATOP:
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case CAIRO_OPERATOR_XOR:
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case CAIRO_OPERATOR_SATURATE:
|
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|
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default:
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return false;
|
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};
|
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}
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static cairo_status_t
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_cairo_beos_surface_finish (void *abstract_surface)
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{
|
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// Nothing to do
|
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return CAIRO_STATUS_SUCCESS;
|
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}
|
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static cairo_status_t
|
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_cairo_beos_surface_acquire_source_image (void *abstract_surface,
|
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cairo_image_surface_t **image_out,
|
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void **image_extra)
|
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{
|
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fprintf(stderr, "Getting source image\n");
|
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cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
|
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abstract_surface);
|
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AutoLockView locker(surface->view);
|
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if (!locker) {
|
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_cairo_error(CAIRO_STATUS_NO_MEMORY);
|
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return CAIRO_STATUS_NO_MEMORY; /// XXX not exactly right, but what can we do?
|
||||
}
|
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|
||||
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surface->view->Sync();
|
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|
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if (surface->bitmap) {
|
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*image_out = _cairo_beos_bitmap_to_surface(surface->bitmap);
|
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if (!*image_out) {
|
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_cairo_error(CAIRO_STATUS_NO_MEMORY);
|
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return CAIRO_STATUS_NO_MEMORY;
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}
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|
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*image_extra = NULL;
|
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return CAIRO_STATUS_SUCCESS;
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}
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BBitmap* bmp;
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if (_cairo_beos_view_to_bitmap(surface->view, &bmp) != OK) {
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_cairo_error(CAIRO_STATUS_NO_MEMORY);
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return CAIRO_STATUS_NO_MEMORY; /// XXX incorrect if the error was NOT_VISIBLE
|
||||
}
|
||||
|
||||
*image_out = _cairo_beos_bitmap_to_surface(bmp);
|
||||
if (!*image_out) {
|
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delete bmp;
|
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_cairo_error(CAIRO_STATUS_NO_MEMORY);
|
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return CAIRO_STATUS_NO_MEMORY;
|
||||
}
|
||||
*image_extra = bmp;
|
||||
|
||||
return CAIRO_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
static void
|
||||
_cairo_beos_surface_release_source_image (void *abstract_surface,
|
||||
cairo_image_surface_t *image,
|
||||
void *image_extra)
|
||||
{
|
||||
cairo_surface_destroy (&image->base);
|
||||
|
||||
BBitmap* bmp = static_cast<BBitmap*>(image_extra);
|
||||
delete bmp;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static cairo_status_t
|
||||
_cairo_beos_surface_acquire_dest_image (void *abstract_surface,
|
||||
cairo_rectangle_t *interest_rect,
|
||||
cairo_image_surface_t **image_out,
|
||||
cairo_rectangle_t *image_rect,
|
||||
void **image_extra)
|
||||
{
|
||||
cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
|
||||
abstract_surface);
|
||||
|
||||
AutoLockView locker(surface->view);
|
||||
if (!locker) {
|
||||
*image_out = NULL;
|
||||
*image_extra = NULL;
|
||||
return CAIRO_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
if (surface->bitmap) {
|
||||
surface->view->Sync();
|
||||
*image_out = _cairo_beos_bitmap_to_surface(surface->bitmap);
|
||||
if (!*image_out) {
|
||||
_cairo_error(CAIRO_STATUS_NO_MEMORY);
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
}
|
||||
|
||||
image_rect->x = 0;
|
||||
image_rect->y = 0;
|
||||
image_rect->width = (*image_out)->width;
|
||||
image_rect->height = (*image_out)->height;
|
||||
|
||||
*image_extra = NULL;
|
||||
return CAIRO_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
BRect b_interest_rect(_cairo_rect_to_brect(interest_rect));
|
||||
|
||||
BRect rect;
|
||||
BBitmap* bitmap;
|
||||
ViewCopyStatus status = _cairo_beos_view_to_bitmap(surface->view, &bitmap,
|
||||
&rect, &b_interest_rect);
|
||||
if (status == NOT_VISIBLE) {
|
||||
*image_out = NULL;
|
||||
*image_extra = NULL;
|
||||
return CAIRO_STATUS_SUCCESS;
|
||||
}
|
||||
if (status == ERROR) {
|
||||
_cairo_error(CAIRO_STATUS_NO_MEMORY);
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
}
|
||||
|
||||
*image_rect = _brect_to_cairo_rect(rect);
|
||||
|
||||
#if 0
|
||||
fprintf(stderr, "Requested: (cairo rects) (%ix%i) dim (%u, %u) returning (%ix%i) dim (%u, %u)\n",
|
||||
interest_rect->x, interest_rect->y, interest_rect->width, interest_rect->height,
|
||||
image_rect->x, image_rect->y, image_rect->width, image_rect->height);
|
||||
#endif
|
||||
|
||||
*image_out = _cairo_beos_bitmap_to_surface(bitmap);
|
||||
delete bitmap;
|
||||
if (!*image_out) {
|
||||
_cairo_error(CAIRO_STATUS_NO_MEMORY);
|
||||
return CAIRO_STATUS_NO_MEMORY;
|
||||
}
|
||||
*image_extra = NULL;
|
||||
|
||||
return CAIRO_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
_cairo_beos_surface_release_dest_image (void *abstract_surface,
|
||||
cairo_rectangle_t *intersect_rect,
|
||||
cairo_image_surface_t *image,
|
||||
cairo_rectangle_t *image_rect,
|
||||
void *image_extra)
|
||||
{
|
||||
fprintf(stderr, "Fallback drawing\n");
|
||||
|
||||
cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
|
||||
abstract_surface);
|
||||
AutoLockView locker(surface->view);
|
||||
if (!locker)
|
||||
return;
|
||||
|
||||
|
||||
BBitmap* bitmap_to_draw = _cairo_image_surface_to_bitmap(image);
|
||||
|
||||
surface->view->PushState();
|
||||
|
||||
surface->view->SetDrawingMode(B_OP_COPY);
|
||||
BRect rect(_cairo_rect_to_brect(image_rect));
|
||||
|
||||
surface->view->DrawBitmap(bitmap_to_draw, rect);
|
||||
|
||||
surface->view->PopState();
|
||||
|
||||
delete bitmap_to_draw;
|
||||
cairo_surface_destroy(&image->base);
|
||||
}
|
||||
|
||||
static cairo_int_status_t
|
||||
_cairo_beos_composite (cairo_operator_t op,
|
||||
cairo_pattern_t *src,
|
||||
cairo_pattern_t *mask,
|
||||
void *dst,
|
||||
int src_x,
|
||||
int src_y,
|
||||
int mask_x,
|
||||
int mask_y,
|
||||
int dst_x,
|
||||
int dst_y,
|
||||
unsigned int width,
|
||||
unsigned int height)
|
||||
{
|
||||
cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
|
||||
dst);
|
||||
AutoLockView locker(surface->view);
|
||||
if (!locker)
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
|
||||
drawing_mode mode;
|
||||
if (!_cairo_op_to_be_op(op, &mode))
|
||||
return CAIRO_INT_STATUS_UNSUPPORTED;
|
||||
|
||||
// XXX Masks are not yet supported
|
||||
if (mask)
|
||||
return CAIRO_INT_STATUS_UNSUPPORTED;
|
||||
|
||||
// XXX should eventually support the others
|
||||
if (src->type != CAIRO_PATTERN_SURFACE ||
|
||||
src->extend != CAIRO_EXTEND_NONE)
|
||||
{
|
||||
return CAIRO_INT_STATUS_UNSUPPORTED;
|
||||
}
|
||||
|
||||
// Can we maybe support other matrices as well? (scale? if the filter is right)
|
||||
int itx, ity;
|
||||
if (!_cairo_matrix_is_integer_translation(&src->matrix, &itx, &ity))
|
||||
return CAIRO_INT_STATUS_UNSUPPORTED;
|
||||
|
||||
BRect srcRect(src_x + itx,
|
||||
src_y + ity,
|
||||
src_x + itx + width - 1,
|
||||
src_y + ity + height - 1);
|
||||
BRect dstRect(dst_x, dst_y, dst_x + width - 1, dst_y + height - 1);
|
||||
|
||||
cairo_surface_t* src_surface = reinterpret_cast<cairo_surface_pattern_t*>(src)->
|
||||
surface;
|
||||
if (_cairo_surface_is_image(src_surface)) {
|
||||
fprintf(stderr, "Composite\n");
|
||||
|
||||
// Draw it on screen.
|
||||
cairo_image_surface_t* img_surface =
|
||||
reinterpret_cast<cairo_image_surface_t*>(src_surface);
|
||||
|
||||
BBitmap* bmp = _cairo_image_surface_to_bitmap(img_surface);
|
||||
surface->view->PushState();
|
||||
|
||||
// If our image rect is only a subrect of the desired size, and we
|
||||
// aren't using B_OP_ALPHA, then we need to fill the rect first.
|
||||
if (mode == B_OP_COPY && !bmp->Bounds().Contains(srcRect)) {
|
||||
rgb_color black = { 0, 0, 0, 0 };
|
||||
|
||||
surface->view->SetDrawingMode(mode);
|
||||
surface->view->SetHighColor(black);
|
||||
surface->view->FillRect(dstRect);
|
||||
}
|
||||
|
||||
if (mode == B_OP_ALPHA && img_surface->format != CAIRO_FORMAT_ARGB32) {
|
||||
mode = B_OP_COPY;
|
||||
|
||||
}
|
||||
surface->view->SetDrawingMode(mode);
|
||||
|
||||
if (surface->bitmap && surface->bitmap->ColorSpace() == B_RGBA32)
|
||||
surface->view->SetBlendingMode(B_PIXEL_ALPHA, B_ALPHA_COMPOSITE);
|
||||
else
|
||||
surface->view->SetBlendingMode(B_PIXEL_ALPHA, B_ALPHA_OVERLAY);
|
||||
|
||||
surface->view->DrawBitmap(bmp, srcRect, dstRect);
|
||||
|
||||
surface->view->PopState();
|
||||
delete bmp;
|
||||
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
return CAIRO_INT_STATUS_UNSUPPORTED;
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
_cairo_beos_fill_rectangle (cairo_beos_surface_t *surface,
|
||||
cairo_rectangle_t *rect)
|
||||
{
|
||||
BRect brect(_cairo_rect_to_brect(rect));
|
||||
surface->view->FillRect(brect);
|
||||
}
|
||||
|
||||
static cairo_int_status_t
|
||||
_cairo_beos_fill_rectangles (void *abstract_surface,
|
||||
cairo_operator_t op,
|
||||
const cairo_color_t *color,
|
||||
cairo_rectangle_t *rects,
|
||||
int num_rects)
|
||||
{
|
||||
fprintf(stderr, "Drawing %i rectangles\n", num_rects);
|
||||
cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
|
||||
abstract_surface);
|
||||
|
||||
if (num_rects <= 0)
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
|
||||
AutoLockView locker(surface->view);
|
||||
if (!locker)
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
|
||||
drawing_mode mode;
|
||||
if (!_cairo_op_to_be_op(op, &mode))
|
||||
return CAIRO_INT_STATUS_UNSUPPORTED;
|
||||
|
||||
rgb_color be_color = _cairo_color_to_be_color(color);
|
||||
|
||||
if (mode == B_OP_ALPHA && be_color.alpha == 0xFF)
|
||||
mode = B_OP_COPY;
|
||||
|
||||
// For CAIRO_OPERATOR_SOURCE, cairo expects us to use the premultiplied
|
||||
// color info. This is only relevant when drawing into an rgb24 buffer
|
||||
// (as for others, we can convert when asked for the image)
|
||||
if (mode == B_OP_COPY && be_color.alpha != 0xFF &&
|
||||
(!surface->bitmap || surface->bitmap->ColorSpace() != B_RGBA32))
|
||||
{
|
||||
be_color.red = premultiply(be_color.red, be_color.alpha);
|
||||
be_color.green = premultiply(be_color.green, be_color.alpha);
|
||||
be_color.blue = premultiply(be_color.blue, be_color.alpha);
|
||||
}
|
||||
|
||||
surface->view->PushState();
|
||||
|
||||
surface->view->SetDrawingMode(mode);
|
||||
surface->view->SetHighColor(be_color);
|
||||
if (surface->bitmap && surface->bitmap->ColorSpace() == B_RGBA32)
|
||||
surface->view->SetBlendingMode(B_CONSTANT_ALPHA, B_ALPHA_COMPOSITE);
|
||||
else
|
||||
surface->view->SetBlendingMode(B_CONSTANT_ALPHA, B_ALPHA_OVERLAY);
|
||||
|
||||
for (int i = 0; i < num_rects; ++i) {
|
||||
_cairo_beos_fill_rectangle(surface, &rects[i]);
|
||||
}
|
||||
|
||||
surface->view->PopState();
|
||||
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
|
||||
|
||||
static cairo_int_status_t
|
||||
_cairo_beos_surface_set_clip_region (void *abstract_surface,
|
||||
pixman_region16_t *region)
|
||||
{
|
||||
fprintf(stderr, "Setting clip region\n");
|
||||
cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
|
||||
abstract_surface);
|
||||
AutoLockView locker(surface->view);
|
||||
if (!locker)
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
|
||||
if (region == NULL) {
|
||||
// No clipping
|
||||
surface->view->ConstrainClippingRegion(NULL);
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
int count = pixman_region_num_rects(region);
|
||||
pixman_box16_t* rects = pixman_region_rects(region);
|
||||
BRegion bregion;
|
||||
for (int i = 0; i < count; ++i) {
|
||||
// Have to substract one, because for pixman, the second coordinate
|
||||
// lies outside the rectangle.
|
||||
bregion.Include(BRect(rects[i].x1, rects[i].y1, rects[i].x2 - 1, rects[i].y2 - 1));
|
||||
}
|
||||
surface->view->ConstrainClippingRegion(&bregion);
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
static cairo_int_status_t
|
||||
_cairo_beos_surface_get_extents (void *abstract_surface,
|
||||
cairo_rectangle_t *rectangle)
|
||||
{
|
||||
cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
|
||||
abstract_surface);
|
||||
AutoLockView locker(surface->view);
|
||||
if (!locker)
|
||||
return CAIRO_INT_STATUS_UNSUPPORTED;
|
||||
|
||||
BRect size = surface->view->Bounds();
|
||||
|
||||
*rectangle = _brect_to_cairo_rect(size);
|
||||
|
||||
// Make sure to have our upperleft edge as (0,0)
|
||||
rectangle->x = 0;
|
||||
rectangle->y = 0;
|
||||
|
||||
return CAIRO_INT_STATUS_SUCCESS;
|
||||
}
|
||||
|
||||
static const struct _cairo_surface_backend cairo_beos_surface_backend = {
|
||||
NULL, /* create_similar */
|
||||
_cairo_beos_surface_finish,
|
||||
_cairo_beos_surface_acquire_source_image,
|
||||
_cairo_beos_surface_release_source_image,
|
||||
_cairo_beos_surface_acquire_dest_image,
|
||||
_cairo_beos_surface_release_dest_image,
|
||||
NULL, /* clone_similar */
|
||||
_cairo_beos_composite, /* composite */
|
||||
_cairo_beos_fill_rectangles,
|
||||
NULL, /* composite_trapezoids */
|
||||
NULL, /* copy_page */
|
||||
NULL, /* show_page */
|
||||
_cairo_beos_surface_set_clip_region,
|
||||
NULL, /* intersect_clip_path */
|
||||
_cairo_beos_surface_get_extents,
|
||||
NULL, /* old_show_glyphs */
|
||||
NULL, /* get_font_options */
|
||||
NULL, /* flush */
|
||||
NULL, /* mark_dirty_rectangle */
|
||||
NULL, /* scaled_font_fini */
|
||||
NULL, /* scaled_glyph_fini */
|
||||
|
||||
NULL, /* paint */
|
||||
NULL, /* mask */
|
||||
NULL, /* stroke */
|
||||
NULL, /* fill */
|
||||
NULL /* show_glyphs */
|
||||
};
|
||||
|
||||
/**
|
||||
* cairo_beos_surface_create:
|
||||
* @view: The view to draw on
|
||||
*
|
||||
* Creates a Cairo surface that draws onto a BeOS BView.
|
||||
* The caller must ensure that the view does not get deleted before the surface.
|
||||
* If the view is attached to a bitmap rather than an on-screen window, use
|
||||
* cairo_beos_surface_create_for_bitmap instead of this function.
|
||||
**/
|
||||
cairo_surface_t *
|
||||
cairo_beos_surface_create (BView* view)
|
||||
{
|
||||
return cairo_beos_surface_create_for_bitmap(view, NULL);
|
||||
}
|
||||
|
||||
/**
|
||||
* cairo_beos_surface_create_for_bitmap:
|
||||
* @view: The view to draw on
|
||||
* @bmp: The bitmap to which the view is attached
|
||||
*
|
||||
* Creates a Cairo surface that draws onto a BeOS BView which is attached to a
|
||||
* BBitmap.
|
||||
* The caller must ensure that the view and the bitmap do not get deleted
|
||||
* before the surface.
|
||||
*
|
||||
* For views that draw to a bitmap (as opposed to a screen), use this function
|
||||
* rather than cairo_beos_surface_create. Not using this function WILL lead to
|
||||
* incorrect behaviour.
|
||||
*
|
||||
* For now, only views that draw to the entire area of bmp are supported.
|
||||
* The view must already be attached to the bitmap.
|
||||
**/
|
||||
cairo_surface_t *
|
||||
cairo_beos_surface_create_for_bitmap (BView* view,
|
||||
BBitmap* bmp)
|
||||
{
|
||||
// Must use malloc, because cairo code will use free() on the surface
|
||||
cairo_beos_surface_t *surface = static_cast<cairo_beos_surface_t*>(
|
||||
malloc(sizeof(cairo_beos_surface_t)));
|
||||
if (surface == NULL) {
|
||||
_cairo_error (CAIRO_STATUS_NO_MEMORY);
|
||||
return const_cast<cairo_surface_t*>(&_cairo_surface_nil);
|
||||
}
|
||||
|
||||
_cairo_surface_init(&surface->base, &cairo_beos_surface_backend);
|
||||
|
||||
surface->view = view;
|
||||
surface->bitmap = bmp;
|
||||
|
||||
return (cairo_surface_t *) surface;
|
||||
}
|
||||
|
||||
// ---------------------------------------------------------------------------
|
||||
// Cairo uses locks without explicit initialization. To support that, we
|
||||
// provide a class here which manages the locks and is in global scope, so the
|
||||
// compiler will instantiate it on library load and destroy it on library
|
||||
// unload.
|
||||
|
||||
class BeLocks {
|
||||
public:
|
||||
BLocker cairo_toy_font_face_hash_table_mutex;
|
||||
BLocker cairo_scaled_font_map_mutex;
|
||||
BLocker cairo_ft_unscaled_font_map_mutex;
|
||||
};
|
||||
|
||||
static BeLocks locks;
|
||||
|
||||
void* cairo_toy_font_face_hash_table_mutex = &locks.cairo_toy_font_face_hash_table_mutex;
|
||||
void* cairo_scaled_font_map_mutex = &locks.cairo_scaled_font_map_mutex;
|
||||
void* cairo_ft_unscaled_font_map_mutex = &locks.cairo_ft_unscaled_font_map_mutex;
|
||||
|
||||
void _cairo_beos_lock (void* locker) {
|
||||
BLocker* bLocker = reinterpret_cast<BLocker*>(locker);
|
||||
bLocker->Lock();
|
||||
}
|
||||
|
||||
void _cairo_beos_unlock (void* locker) {
|
||||
BLocker* bLocker = reinterpret_cast<BLocker*>(locker);
|
||||
bLocker->Unlock();
|
||||
}
|
||||
|
||||
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