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+/* vim:set ts=8 sw=4 noet cin: */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2005 Christian Biesinger <cbiesinger@web.de>
+ *
+ * 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 Christian Biesinger
+ * <cbiesinger@web.de>
+ *
+ * Contributor(s):
+ */
+
+// This is a C++ file in order to use the C++ BeOS API
+
+#include "cairoint.h"
+
+#include "cairo-beos.h"
+
+#include "cairo-error-private.h"
+#include "cairo-image-surface-inline.h"
+
+#include <new>
+
+#include <Bitmap.h>
+#include <Region.h>
+#if 0
+#include <DirectWindow.h>
+#endif
+#include <Screen.h>
+#include <Window.h>
+#include <Locker.h>
+
+/**
+ * SECTION:beos-surface
+ * @Title: BeOS Surfaces
+ * @Short_Description: BeOS surface support
+ * @See_Also: #cairo_surface_t
+ *
+ * The BeOS surface is used to render cairo graphics to BeOS views
+ * and bitmaps.
+ **/
+
+#define CAIRO_INT_STATUS_SUCCESS (cairo_int_status_t)(CAIRO_STATUS_SUCCESS)
+
+struct cairo_beos_surface_t {
+ cairo_surface_t base;
+
+ cairo_region_t *clip_region;
+
+ BView* view;
+
+ /*
+ * A view is either attached to a bitmap, a window, or unattached.
+ * If it is attached to a window, we can copy data out of it using BScreen.
+ * If it is attached to a bitmap, we can read the bitmap data.
+ * If it is not attached, it doesn't draw anything, we need not bother.
+ *
+ * Since there doesn't seem to be a way to get the bitmap from a view if it
+ * is attached to one, we have to use a special surface creation function.
+ */
+
+ BBitmap* bitmap;
+
+ // If true, surface and view should be deleted when this surface is
+ // destroyed
+ bool owns_bitmap_view;
+};
+
+class AutoLockView {
+ public:
+ AutoLockView(BView* view) : mView(view) {
+ mOK = mView->LockLooper();
+ }
+
+ ~AutoLockView() {
+ if (mOK)
+ mView->UnlockLooper();
+ }
+
+ operator bool() {
+ return mOK;
+ }
+
+ private:
+ BView* mView;
+ bool mOK;
+};
+
+static cairo_surface_t *
+_cairo_beos_surface_create_internal (BView* view,
+ BBitmap* bmp,
+ bool owns_bitmap_view = false);
+
+static inline BRect
+_cairo_rectangle_to_brect (const cairo_rectangle_int_t* rect)
+{
+ // A BRect is one pixel wider than you'd think
+ return BRect (rect->x, rect->y,
+ rect->x + rect->width - 1,
+ rect->y + rect->height - 1);
+}
+
+static inline cairo_rectangle_int_t
+_brect_to_cairo_rectangle (const BRect &rect)
+{
+ cairo_rectangle_int_t retval;
+ retval.x = floor (rect.left);
+ retval.y = floor (rect.top);
+ retval.width = ceil (rect.right) - retval.x + 1;
+ retval.height = ceil (rect.bottom) - rectval.y + 1;
+ return retval;
+}
+
+static inline rgb_color
+_cairo_color_to_be_color (const cairo_color_t *color)
+{
+ // This factor ensures a uniform distribution of numbers
+ const float factor = 256 - 1e-5;
+ // Using doubles to have non-premultiplied colors
+ rgb_color be_color = { uint8(color->red * factor),
+ uint8(color->green * factor),
+ uint8(color->blue * factor),
+ uint8(color->alpha * factor) };
+
+ return be_color;
+}
+
+enum ViewCopyStatus {
+ OK,
+ NOT_VISIBLE, // The view or the interest rect is not visible on screen
+ ERROR // The view was visible, but the rect could not be copied. Probably OOM
+};
+
+/**
+ * _cairo_beos_view_to_bitmap:
+ * @bitmap: [out] The resulting bitmap.
+ * @rect: [out] The rectangle that was copied, in the view's coordinate system
+ * @interestRect: If non-null, only this part of the view will be copied (view's coord system).
+ *
+ * Gets the contents of the view as a BBitmap*. Caller must delete the bitmap.
+ **/
+static ViewCopyStatus
+_cairo_beos_view_to_bitmap (BView* view,
+ BBitmap** bitmap,
+ BRect* rect = NULL,
+ const BRect* interestRect = NULL)
+{
+ *bitmap = NULL;
+
+ BWindow* wnd = view->Window();
+ // If we have no window, can't do anything
+ if (!wnd)
+ return NOT_VISIBLE;
+
+ view->Sync();
+ wnd->Sync();
+
+#if 0
+ // Is it a direct window?
+ BDirectWindow* directWnd = dynamic_cast<BDirectWindow*>(wnd);
+ if (directWnd) {
+ // WRITEME
+ }
+#endif
+
+ // Is it visible? If so, we can copy the content off the screen
+ if (wnd->IsHidden())
+ return NOT_VISIBLE;
+
+ BRect rectToCopy(view->Bounds());
+ if (interestRect)
+ rectToCopy = rectToCopy & *interestRect;
+
+ if (!rectToCopy.IsValid())
+ return NOT_VISIBLE;
+
+ BScreen screen(wnd);
+ BRect screenRect(view->ConvertToScreen(rectToCopy));
+ screenRect = screenRect & screen.Frame();
+
+ if (!screen.IsValid())
+ return NOT_VISIBLE;
+
+ if (rect)
+ *rect = view->ConvertFromScreen(screenRect);
+
+ if (screen.GetBitmap(bitmap, false, &screenRect) == B_OK)
+ return OK;
+
+ return ERROR;
+}
+
+static void
+unpremultiply_bgra (unsigned char* data,
+ int width,
+ int height,
+ int stride,
+ unsigned char* retdata)
+{
+ unsigned char* end = data + stride * height;
+ for (unsigned char* in = data, *out = retdata;
+ in < end;
+ in += stride, out += stride)
+ {
+ for (int i = 0; i < width; i ++) {
+ uint8_t *b = &out[4*i];
+ uint32_t pixel;
+ uint8_t alpha;
+
+ memcpy (&pixel, &data[4*i], sizeof (uint32_t));
+ alpha = pixel & 0xff;
+ if (alpha == 0) {
+ b[0] = b[1] = b[2] = b[3] = 0;
+ } else {
+ b[0] = (((pixel >> 24) & 0xff) * 255 + alpha / 2) / alpha;
+ b[1] = (((pixel >> 16) & 0xff) * 255 + alpha / 2) / alpha;
+ b[2] = (((pixel >> 8) & 0xff) * 255 + alpha / 2) / alpha;
+ b[3] = alpha;
+ }
+ }
+ }
+}
+
+static inline int
+multiply_alpha (int alpha, int color)
+{
+ int temp = (alpha * color) + 0x80;
+ return ((temp + (temp >> 8)) >> 8);
+}
+
+static unsigned char*
+premultiply_bgra (unsigned char* data,
+ int width,
+ int height,
+ int stride)
+{
+ uint8_t * retdata = reinterpret_cast<unsigned char*>(_cairo_malloc_ab(height, stride));
+ if (!retdata)
+ return NULL;
+
+ uint8_t * end = data + stride * height;
+ for (uint8_t * in = data, *out = retdata;
+ in < end;
+ in += stride, out += stride)
+ {
+ for (int i = 0; i < width; i ++) {
+ uint8_t *base = &in[4*i];
+ uint8_t alpha = base[3];
+ uint32_t p;
+
+ if (alpha == 0) {
+ p = 0;
+ } else {
+ uint8_t blue = base[0];
+ uint8_t green = base[1];
+ uint8_t red = base[2];
+
+ if (alpha != 0xff) {
+ blue = multiply_alpha (alpha, blue);
+ green = multiply_alpha (alpha, green);
+ red = multiply_alpha (alpha, red);
+ }
+ p = (alpha << 0) | (red << 8) | (green << 16) | (blue << 24);
+ }
+ memcpy (&out[4*i], &p, sizeof (uint32_t));
+ }
+ }
+ return retdata;
+}
+
+static cairo_int_status_t
+_cairo_beos_surface_set_clip_region (cairo_beos_surface_t *surface,
+ cairo_region_t *region)
+{
+ cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
+ abstract_surface);
+ AutoLockView locker(surface->view);
+ assert (locker);
+
+ if (region == surface->clip_region)
+ return CAIRO_INT_STATUS_SUCCESS;
+
+ cairo_region_destroy (surface->clip_region);
+ surface->clip_region = cairo_region_reference (region);
+
+ if (region == NULL) {
+ // No clipping
+ surface->view->ConstrainClippingRegion(NULL);
+ return CAIRO_INT_STATUS_SUCCESS;
+ }
+
+ int count = cairo_region_num_rectangles (region);
+ BRegion bregion;
+ for (int i = 0; i < count; ++i) {
+ cairo_rectangle_int_t rect;
+
+ cairo_region_get_rectangle (region, i, &rect);
+ // Have to subtract one, because for pixman, the second coordinate
+ // lies outside the rectangle.
+ bregion.Include (_cairo_rectangle_to_brect (&rect));
+ }
+ surface->view->ConstrainClippingRegion(&bregion);
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+
+/**
+ * _cairo_beos_bitmap_to_surface:
+ *
+ * Returns an addrefed image surface for a BBitmap. The bitmap need not outlive
+ * the surface.
+ **/
+static cairo_image_surface_t*
+_cairo_beos_bitmap_to_surface (BBitmap* bitmap)
+{
+ color_space format = bitmap->ColorSpace();
+ if (format != B_RGB32 && format != B_RGBA32) {
+ BBitmap bmp(bitmap->Bounds(), B_RGB32, true);
+ BView view(bitmap->Bounds(), "Cairo bitmap drawing view",
+ B_FOLLOW_ALL_SIDES, 0);
+ bmp.AddChild(&view);
+
+ view.LockLooper();
+
+ view.DrawBitmap(bitmap, BPoint(0.0, 0.0));
+ view.Sync();
+
+ cairo_image_surface_t* imgsurf = _cairo_beos_bitmap_to_surface(&bmp);
+
+ view.UnlockLooper();
+ bmp.RemoveChild(&view);
+ return imgsurf;
+ }
+
+ cairo_format_t cformat = format == B_RGB32 ?
+ CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32;
+
+ BRect bounds(bitmap->Bounds());
+ unsigned char* bits = reinterpret_cast<unsigned char*>(bitmap->Bits());
+ int width = bounds.IntegerWidth() + 1;
+ int height = bounds.IntegerHeight() + 1;
+ unsigned char* premultiplied;
+ if (cformat == CAIRO_FORMAT_ARGB32) {
+ premultiplied = premultiply_bgra (bits, width, height,
+ bitmap->BytesPerRow());
+ } else {
+ premultiplied = reinterpret_cast<unsigned char*>(
+ _cairo_malloc_ab(bitmap->BytesPerRow(), height));
+ if (premultiplied)
+ memcpy(premultiplied, bits, bitmap->BytesPerRow() * height);
+ }
+ if (!premultiplied)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ cairo_image_surface_t* surf = reinterpret_cast<cairo_image_surface_t*>
+ (cairo_image_surface_create_for_data(premultiplied,
+ cformat,
+ width,
+ height,
+ bitmap->BytesPerRow()));
+ if (surf->base.status)
+ free(premultiplied);
+ else
+ _cairo_image_surface_assume_ownership_of_data(surf);
+ return surf;
+}
+
+/**
+ * _cairo_image_surface_to_bitmap:
+ *
+ * Converts an image surface to a BBitmap. The return value must be freed with
+ * delete.
+ **/
+static BBitmap*
+_cairo_image_surface_to_bitmap (cairo_image_surface_t* surface)
+{
+ BRect size(0.0, 0.0, surface->width - 1, surface->height - 1);
+ switch (surface->format) {
+ case CAIRO_FORMAT_ARGB32: {
+ BBitmap* data = new BBitmap(size, B_RGBA32);
+ unpremultiply_bgra (surface->data,
+ surface->width,
+ surface->height,
+ surface->stride,
+ reinterpret_cast<unsigned char*>(data->Bits()));
+ return data;
+ }
+ case CAIRO_FORMAT_RGB24: {
+ BBitmap* data = new BBitmap(size, B_RGB32);
+ memcpy(data->Bits(), surface->data, surface->height * surface->stride);
+ return data;
+ }
+ default:
+ assert(0);
+ return NULL;
+ }
+}
+
+/**
+ * _cairo_op_to_be_op:
+ *
+ * Converts a cairo drawing operator to a beos drawing_mode. Returns true if
+ * the operator could be converted, false otherwise.
+ **/
+static bool
+_cairo_op_to_be_op (cairo_operator_t cairo_op,
+ drawing_mode* beos_op)
+{
+ switch (cairo_op) {
+ case CAIRO_OPERATOR_SOURCE:
+ *beos_op = B_OP_COPY;
+ return true;
+ case CAIRO_OPERATOR_OVER:
+ *beos_op = B_OP_ALPHA;
+ return true;
+
+ case CAIRO_OPERATOR_ADD:
+ // Does not actually work
+ // XXX This is a fundamental compositing operator, it has to work!
+#if 1
+ return false;
+#else
+ *beos_op = B_OP_ADD;
+ return true;
+#endif
+
+ case CAIRO_OPERATOR_CLEAR:
+ // Does not map to B_OP_ERASE - it replaces the dest with the low
+ // color, instead of transparency; could be done by setting low
+ // color appropriately.
+
+ 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:
+ case CAIRO_OPERATOR_SATURATE:
+
+ default:
+ return false;
+ }
+}
+
+static cairo_surface_t *
+_cairo_beos_surface_create_similar (void *abstract_surface,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
+ abstract_surface);
+
+ if (width <= 0)
+ width = 1;
+ if (height <= 0)
+ height = 1;
+
+ BRect rect(0.0, 0.0, width - 1, height - 1);
+ BBitmap* bmp;
+ switch (content) {
+ case CAIRO_CONTENT_ALPHA:
+ return NULL;
+ case CAIRO_CONTENT_COLOR_ALPHA:
+ bmp = new BBitmap(rect, B_RGBA32, true);
+ break;
+ case CAIRO_CONTENT_COLOR:
+ // Match the color depth
+ if (surface->bitmap) {
+ color_space space = surface->bitmap->ColorSpace();
+ // No alpha was requested -> make sure not to return
+ // a surface with alpha
+ if (space == B_RGBA32)
+ space = B_RGB32;
+ if (space == B_RGBA15)
+ space = B_RGB15;
+ bmp = new BBitmap(rect, space, true);
+ } else {
+ BScreen scr(surface->view->Window());
+ color_space space = B_RGB32;
+ if (scr.IsValid())
+ space = scr.ColorSpace();
+ bmp = new BBitmap(rect, space, true);
+ }
+ break;
+ default:
+ ASSERT_NOT_REACHED;
+ return NULL;
+ }
+ BView* view = new BView(rect, "Cairo bitmap view", B_FOLLOW_ALL_SIDES, 0);
+ bmp->AddChild(view);
+ return _cairo_beos_surface_create_internal(view, bmp, true);
+}
+
+static cairo_status_t
+_cairo_beos_surface_finish (void *abstract_surface)
+{
+ cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
+ abstract_surface);
+ if (surface->owns_bitmap_view) {
+ if (surface->bitmap)
+ surface->bitmap->RemoveChild(surface->view);
+
+ delete surface->view;
+ delete surface->bitmap;
+
+ surface->view = NULL;
+ surface->bitmap = NULL;
+ }
+
+ cairo_region_destroy (surface->clip_region);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_status_t
+_cairo_beos_surface_acquire_source_image (void *abstract_surface,
+ cairo_image_surface_t **image_out,
+ void **image_extra)
+{
+ cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
+ abstract_surface);
+ AutoLockView locker(surface->view);
+ if (!locker)
+ return CAIRO_STATUS_NO_MEMORY; /// XXX not exactly right, but what can we do?
+
+
+ surface->view->Sync();
+
+ if (surface->bitmap) {
+ *image_out = _cairo_beos_bitmap_to_surface (surface->bitmap);
+ if (unlikely ((*image_out)->base.status))
+ return (*image_out)->base.status;
+
+ *image_extra = NULL;
+ return CAIRO_STATUS_SUCCESS;
+ }
+
+ BBitmap* bmp;
+ if (_cairo_beos_view_to_bitmap(surface->view, &bmp) != OK)
+ return CAIRO_STATUS_NO_MEMORY; /// XXX incorrect if the error was NOT_VISIBLE
+
+ *image_out = _cairo_beos_bitmap_to_surface (bmp);
+ if (unlikely ((*image_out)->base.status)) {
+ delete bmp;
+ return (*image_out)->base.status;
+ }
+ *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);
+
+ if (image_extra != NULL) {
+ BBitmap* bmp = static_cast<BBitmap*>(image_extra);
+ delete bmp;
+ }
+}
+
+static cairo_status_t
+_cairo_beos_surface_acquire_dest_image (void *abstract_surface,
+ cairo_rectangle_int_t *interest_rect,
+ cairo_image_surface_t **image_out,
+ cairo_rectangle_int_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_t) CAIRO_INT_STATUS_NOTHING_TO_DO;
+ }
+
+ if (surface->bitmap) {
+ surface->view->Sync();
+ *image_out = _cairo_beos_bitmap_to_surface(surface->bitmap);
+ if (unlikely ((*image_out)->base.status))
+ return (*image_out)->base.status;
+
+ 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_rectangle_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)
+ return CAIRO_STATUS_NO_MEMORY;
+
+ *image_rect = _brect_to_cairo_rectangle(rect);
+ *image_out = _cairo_beos_bitmap_to_surface(bitmap);
+ delete bitmap;
+ if (unlikely ((*image_out)->base.status))
+ return (*image_out)->base.status;
+
+ *image_extra = NULL;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+
+static void
+_cairo_beos_surface_release_dest_image (void *abstract_surface,
+ cairo_rectangle_int_t *intersect_rect,
+ cairo_image_surface_t *image,
+ cairo_rectangle_int_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)
+ return;
+
+ BBitmap* bitmap_to_draw = _cairo_image_surface_to_bitmap(image);
+ surface->view->PushState();
+
+ surface->view->SetDrawingMode(B_OP_COPY);
+
+ surface->view->DrawBitmap (bitmap_to_draw,
+ _cairo_rectangle_to_brect (image_rect));
+
+ surface->view->PopState();
+
+ delete bitmap_to_draw;
+ cairo_surface_destroy(&image->base);
+}
+
+static cairo_int_status_t
+_cairo_beos_surface_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_region_t *clip_region)
+{
+ cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
+ dst);
+ cairo_int_status_t status;
+ 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_TYPE_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;
+
+ status = _cairo_beos_surface_set_clip_region (surface, clip_region);
+ if (unlikely (status))
+ return status;
+
+ 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;
+
+ // Get a bitmap
+ BBitmap* bmp = NULL;
+ bool free_bmp = false;
+ if (_cairo_surface_is_image(src_surface)) {
+ cairo_image_surface_t* img_surface =
+ reinterpret_cast<cairo_image_surface_t*>(src_surface);
+
+ bmp = _cairo_image_surface_to_bitmap(img_surface);
+ free_bmp = true;
+ } else if (src_surface->backend == surface->base.backend) {
+ cairo_beos_surface_t *beos_surface =
+ reinterpret_cast<cairo_beos_surface_t*>(src_surface);
+ if (beos_surface->bitmap) {
+ AutoLockView locker(beos_surface->view);
+ if (locker)
+ beos_surface->view->Sync();
+ bmp = beos_surface->bitmap;
+ } else {
+ _cairo_beos_view_to_bitmap(surface->view, &bmp);
+ free_bmp = true;
+ }
+ }
+
+ if (!bmp)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ // So, BeOS seems to screw up painting an opaque bitmap onto a
+ // translucent one (it makes them partly transparent). Just return
+ // unsupported.
+ if (bmp->ColorSpace() == B_RGB32 && surface->bitmap &&
+ surface->bitmap->ColorSpace() == B_RGBA32 &&
+ (mode == B_OP_COPY || mode == B_OP_ALPHA))
+ {
+ if (free_bmp)
+ delete bmp;
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ // Draw it on screen.
+ 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 && bmp->ColorSpace() == B_RGB32) {
+ 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();
+
+ if (free_bmp)
+ delete bmp;
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+
+static cairo_int_status_t
+_cairo_beos_surface_fill_rectangles (void *abstract_surface,
+ cairo_operator_t op,
+ const cairo_color_t *color,
+ cairo_rectangle_int_t *rects,
+ int num_rects,
+ cairo_region_t *clip_region)
+{
+ cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
+ abstract_surface);
+ cairo_int_status_t status;
+
+ 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;
+
+ status = _cairo_beos_surface_set_clip_region (surface, clip_region);
+ if (unlikely (status))
+ return status;
+
+ 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 = color->red_short >> 8;
+ be_color.green = color->green_short >> 8;
+ be_color.blue = color->blue_short >> 8;
+ }
+
+ 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)
+ surface->view->FillRect (_cairo_rectangle_to_brect (&rects[i]));
+
+ surface->view->PopState();
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static cairo_bool_t
+_cairo_beos_surface_get_extents (void *abstract_surface,
+ cairo_rectangle_int_t *rectangle)
+{
+ cairo_beos_surface_t *surface = reinterpret_cast<cairo_beos_surface_t*>(
+ abstract_surface);
+ AutoLockView locker(surface->view);
+ if (!locker)
+ return FALSE;
+
+ *rectangle = _brect_to_cairo_rectangle (surface->view->Bounds());
+ return TRUE;
+}
+
+static const struct _cairo_surface_backend cairo_beos_surface_backend = {
+ CAIRO_SURFACE_TYPE_BEOS,
+ _cairo_beos_surface_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_surface_composite, /* composite */
+ _cairo_beos_surface_fill_rectangles,
+ NULL, /* composite_trapezoids */
+ NULL, /* create_span_renderer */
+ NULL, /* check_span_renderer */
+ NULL, /* copy_page */
+ NULL, /* show_page */
+ _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 */
+};
+
+static cairo_surface_t *
+_cairo_beos_surface_create_internal (BView* view,
+ BBitmap* bmp,
+ bool owns_bitmap_view)
+{
+ // 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_content_t content = CAIRO_CONTENT_COLOR;
+ if (bmp && (bmp->ColorSpace() == B_RGBA32 || bmp->ColorSpace() == B_RGBA15))
+ content = CAIRO_CONTENT_COLOR_ALPHA;
+ _cairo_surface_init (&surface->base,
+ &cairo_beos_surface_backend,
+ NULL, /* device */
+ content);
+
+ surface->view = view;
+ surface->bitmap = bmp;
+ surface->owns_bitmap_view = owns_bitmap_view;
+
+ surface->clip_region = NULL;
+
+ return &surface->base;
+}
+
+/**
+ * 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.
+ *
+ * Since: TBD
+ **/
+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.
+ *
+ * Since: TBD
+ **/
+cairo_surface_t *
+cairo_beos_surface_create_for_bitmap (BView* view,
+ BBitmap* bmp)
+{
+ return _cairo_beos_surface_create_internal(view, bmp);
+}