summaryrefslogtreecommitdiff
path: root/libs/cairo-1.16.0/src/win32/cairo-win32-display-surface.c
diff options
context:
space:
mode:
Diffstat (limited to 'libs/cairo-1.16.0/src/win32/cairo-win32-display-surface.c')
-rw-r--r--libs/cairo-1.16.0/src/win32/cairo-win32-display-surface.c1147
1 files changed, 1147 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/win32/cairo-win32-display-surface.c b/libs/cairo-1.16.0/src/win32/cairo-win32-display-surface.c
new file mode 100644
index 0000000..304d34a
--- /dev/null
+++ b/libs/cairo-1.16.0/src/win32/cairo-win32-display-surface.c
@@ -0,0 +1,1147 @@
+/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
+/* Cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2005 Red Hat, Inc.
+ * Copyright © 2012 Intel 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 Red Hat, Inc.
+ *
+ * Contributor(s):
+ * Owen Taylor <otaylor@redhat.com>
+ * Stuart Parmenter <stuart@mozilla.com>
+ * Vladimir Vukicevic <vladimir@pobox.com>
+ */
+
+#define WIN32_LEAN_AND_MEAN
+/* We require Windows 2000 features such as ETO_PDY */
+#if !defined(WINVER) || (WINVER < 0x0500)
+# define WINVER 0x0500
+#endif
+#if !defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0500)
+# define _WIN32_WINNT 0x0500
+#endif
+
+#include "cairoint.h"
+
+#include "cairo-clip-private.h"
+#include "cairo-composite-rectangles-private.h"
+#include "cairo-compositor-private.h"
+#include "cairo-damage-private.h"
+#include "cairo-default-context-private.h"
+#include "cairo-error-private.h"
+#include "cairo-image-surface-inline.h"
+#include "cairo-paginated-private.h"
+#include "cairo-pattern-private.h"
+#include "cairo-win32-private.h"
+#include "cairo-scaled-font-subsets-private.h"
+#include "cairo-surface-fallback-private.h"
+#include "cairo-surface-backend-private.h"
+
+#include <wchar.h>
+#include <windows.h>
+
+#if defined(__MINGW32__) && !defined(ETO_PDY)
+# define ETO_PDY 0x2000
+#endif
+
+#define PELS_72DPI ((LONG)(72. / 0.0254))
+
+/**
+ * SECTION:cairo-win32
+ * @Title: Win32 Surfaces
+ * @Short_Description: Microsoft Windows surface support
+ * @See_Also: #cairo_surface_t
+ *
+ * The Microsoft Windows surface is used to render cairo graphics to
+ * Microsoft Windows windows, bitmaps, and printing device contexts.
+ *
+ * The surface returned by cairo_win32_printing_surface_create() is of surface
+ * type %CAIRO_SURFACE_TYPE_WIN32_PRINTING and is a multi-page vector surface
+ * type.
+ *
+ * The surface returned by the other win32 constructors is of surface type
+ * %CAIRO_SURFACE_TYPE_WIN32 and is a raster surface type.
+ **/
+
+/**
+ * CAIRO_HAS_WIN32_SURFACE:
+ *
+ * Defined if the Microsoft Windows surface backend is available.
+ * This macro can be used to conditionally compile backend-specific code.
+ *
+ * Since: 1.0
+ **/
+
+static const cairo_surface_backend_t cairo_win32_display_surface_backend;
+
+static cairo_status_t
+_create_dc_and_bitmap (cairo_win32_display_surface_t *surface,
+ HDC original_dc,
+ cairo_format_t format,
+ int width,
+ int height,
+ unsigned char **bits_out,
+ int *rowstride_out)
+{
+ cairo_status_t status;
+
+ BITMAPINFO *bitmap_info = NULL;
+ struct {
+ BITMAPINFOHEADER bmiHeader;
+ RGBQUAD bmiColors[2];
+ } bmi_stack;
+ void *bits;
+
+ int num_palette = 0; /* Quiet GCC */
+ int i;
+
+ surface->win32.dc = NULL;
+ surface->bitmap = NULL;
+ surface->is_dib = FALSE;
+
+ switch (format) {
+ default:
+ case CAIRO_FORMAT_INVALID:
+ case CAIRO_FORMAT_RGB16_565:
+ case CAIRO_FORMAT_RGB30:
+ return _cairo_error (CAIRO_STATUS_INVALID_FORMAT);
+ case CAIRO_FORMAT_ARGB32:
+ case CAIRO_FORMAT_RGB24:
+ num_palette = 0;
+ break;
+
+ case CAIRO_FORMAT_A8:
+ num_palette = 256;
+ break;
+
+ case CAIRO_FORMAT_A1:
+ num_palette = 2;
+ break;
+ }
+
+ if (num_palette > 2) {
+ bitmap_info = _cairo_malloc_ab_plus_c (num_palette, sizeof(RGBQUAD), sizeof(BITMAPINFOHEADER));
+ if (!bitmap_info)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+ } else {
+ bitmap_info = (BITMAPINFO *)&bmi_stack;
+ }
+
+ bitmap_info->bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
+ bitmap_info->bmiHeader.biWidth = width == 0 ? 1 : width;
+ bitmap_info->bmiHeader.biHeight = height == 0 ? -1 : - height; /* top-down */
+ bitmap_info->bmiHeader.biSizeImage = 0;
+ bitmap_info->bmiHeader.biXPelsPerMeter = PELS_72DPI; /* unused here */
+ bitmap_info->bmiHeader.biYPelsPerMeter = PELS_72DPI; /* unused here */
+ bitmap_info->bmiHeader.biPlanes = 1;
+
+ switch (format) {
+ case CAIRO_FORMAT_INVALID:
+ case CAIRO_FORMAT_RGB16_565:
+ case CAIRO_FORMAT_RGB30:
+ ASSERT_NOT_REACHED;
+ /* We can't create real RGB24 bitmaps because something seems to
+ * break if we do, especially if we don't set up an image
+ * fallback. It could be a bug with using a 24bpp pixman image
+ * (and creating one with masks). So treat them like 32bpp.
+ * Note: This causes problems when using BitBlt/AlphaBlend/etc!
+ * see end of file.
+ */
+ case CAIRO_FORMAT_RGB24:
+ case CAIRO_FORMAT_ARGB32:
+ bitmap_info->bmiHeader.biBitCount = 32;
+ bitmap_info->bmiHeader.biCompression = BI_RGB;
+ bitmap_info->bmiHeader.biClrUsed = 0; /* unused */
+ bitmap_info->bmiHeader.biClrImportant = 0;
+ break;
+
+ case CAIRO_FORMAT_A8:
+ bitmap_info->bmiHeader.biBitCount = 8;
+ bitmap_info->bmiHeader.biCompression = BI_RGB;
+ bitmap_info->bmiHeader.biClrUsed = 256;
+ bitmap_info->bmiHeader.biClrImportant = 0;
+
+ for (i = 0; i < 256; i++) {
+ bitmap_info->bmiColors[i].rgbBlue = i;
+ bitmap_info->bmiColors[i].rgbGreen = i;
+ bitmap_info->bmiColors[i].rgbRed = i;
+ bitmap_info->bmiColors[i].rgbReserved = 0;
+ }
+ break;
+
+ case CAIRO_FORMAT_A1:
+ bitmap_info->bmiHeader.biBitCount = 1;
+ bitmap_info->bmiHeader.biCompression = BI_RGB;
+ bitmap_info->bmiHeader.biClrUsed = 2;
+ bitmap_info->bmiHeader.biClrImportant = 0;
+
+ for (i = 0; i < 2; i++) {
+ bitmap_info->bmiColors[i].rgbBlue = i * 255;
+ bitmap_info->bmiColors[i].rgbGreen = i * 255;
+ bitmap_info->bmiColors[i].rgbRed = i * 255;
+ bitmap_info->bmiColors[i].rgbReserved = 0;
+ }
+ break;
+ }
+
+ surface->win32.dc = CreateCompatibleDC (original_dc);
+ if (!surface->win32.dc)
+ goto FAIL;
+
+ surface->bitmap = CreateDIBSection (surface->win32.dc,
+ bitmap_info,
+ DIB_RGB_COLORS,
+ &bits,
+ NULL, 0);
+ if (!surface->bitmap)
+ goto FAIL;
+
+ surface->is_dib = TRUE;
+
+ GdiFlush();
+
+ surface->saved_dc_bitmap = SelectObject (surface->win32.dc,
+ surface->bitmap);
+ if (!surface->saved_dc_bitmap)
+ goto FAIL;
+
+ if (bitmap_info && num_palette > 2)
+ free (bitmap_info);
+
+ if (bits_out)
+ *bits_out = bits;
+
+ if (rowstride_out) {
+ /* Windows bitmaps are padded to 32-bit (dword) boundaries */
+ switch (format) {
+ case CAIRO_FORMAT_INVALID:
+ case CAIRO_FORMAT_RGB16_565:
+ case CAIRO_FORMAT_RGB30:
+ ASSERT_NOT_REACHED;
+ case CAIRO_FORMAT_ARGB32:
+ case CAIRO_FORMAT_RGB24:
+ *rowstride_out = 4 * width;
+ break;
+
+ case CAIRO_FORMAT_A8:
+ *rowstride_out = (width + 3) & ~3;
+ break;
+
+ case CAIRO_FORMAT_A1:
+ *rowstride_out = ((width + 31) & ~31) / 8;
+ break;
+ }
+ }
+
+ surface->win32.flags = _cairo_win32_flags_for_dc (surface->win32.dc, format);
+
+ return CAIRO_STATUS_SUCCESS;
+
+ FAIL:
+ status = _cairo_win32_print_gdi_error (__FUNCTION__);
+
+ if (bitmap_info && num_palette > 2)
+ free (bitmap_info);
+
+ if (surface->saved_dc_bitmap) {
+ SelectObject (surface->win32.dc, surface->saved_dc_bitmap);
+ surface->saved_dc_bitmap = NULL;
+ }
+
+ if (surface->bitmap) {
+ DeleteObject (surface->bitmap);
+ surface->bitmap = NULL;
+ }
+
+ if (surface->win32.dc) {
+ DeleteDC (surface->win32.dc);
+ surface->win32.dc = NULL;
+ }
+
+ return status;
+}
+
+static cairo_surface_t *
+_cairo_win32_display_surface_create_for_dc (HDC original_dc,
+ cairo_format_t format,
+ int width,
+ int height)
+{
+ cairo_status_t status;
+ cairo_device_t *device;
+ cairo_win32_display_surface_t *surface;
+ unsigned char *bits;
+ int rowstride;
+
+ surface = _cairo_malloc (sizeof (*surface));
+ if (surface == NULL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ surface->fallback = NULL;
+
+ status = _create_dc_and_bitmap (surface, original_dc, format,
+ width, height,
+ &bits, &rowstride);
+ if (status)
+ goto FAIL;
+
+ surface->image = cairo_image_surface_create_for_data (bits, format,
+ width, height, rowstride);
+ status = surface->image->status;
+ if (status)
+ goto FAIL;
+
+ _cairo_image_surface_set_parent (to_image_surface(surface->image),
+ &surface->win32.base);
+
+ surface->win32.format = format;
+
+ surface->win32.extents.x = 0;
+ surface->win32.extents.y = 0;
+ surface->win32.extents.width = width;
+ surface->win32.extents.height = height;
+ surface->win32.x_ofs = 0;
+ surface->win32.y_ofs = 0;
+
+ surface->initial_clip_rgn = NULL;
+ surface->had_simple_clip = FALSE;
+
+ device = _cairo_win32_device_get ();
+
+ _cairo_surface_init (&surface->win32.base,
+ &cairo_win32_display_surface_backend,
+ device,
+ _cairo_content_from_format (format),
+ FALSE); /* is_vector */
+
+ cairo_device_destroy (device);
+
+ return &surface->win32.base;
+
+ FAIL:
+ if (surface->bitmap) {
+ SelectObject (surface->win32.dc, surface->saved_dc_bitmap);
+ DeleteObject (surface->bitmap);
+ DeleteDC (surface->win32.dc);
+ }
+ free (surface);
+
+ return _cairo_surface_create_in_error (status);
+}
+
+static cairo_surface_t *
+_cairo_win32_display_surface_create_similar (void *abstract_src,
+ cairo_content_t content,
+ int width,
+ int height)
+{
+ cairo_win32_display_surface_t *src = abstract_src;
+ cairo_format_t format = _cairo_format_from_content (content);
+ cairo_surface_t *new_surf = NULL;
+
+ /* We force a DIB always if:
+ * - we need alpha; or
+ * - the parent is a DIB; or
+ * - the parent is for printing (because we don't care about the
+ * bit depth at that point)
+ *
+ * We also might end up with a DIB even if a DDB is requested if
+ * DDB creation failed due to out of memory.
+ */
+ if (!(src->is_dib || content & CAIRO_CONTENT_ALPHA)) {
+ /* try to create a ddb */
+ new_surf = cairo_win32_surface_create_with_ddb (src->win32.dc, CAIRO_FORMAT_RGB24, width, height);
+
+ if (new_surf->status)
+ new_surf = NULL;
+ }
+
+ if (new_surf == NULL) {
+ new_surf = _cairo_win32_display_surface_create_for_dc (src->win32.dc, format, width, height);
+ }
+
+ return new_surf;
+}
+
+static cairo_surface_t *
+_cairo_win32_display_surface_create_similar_image (void *abstract_other,
+ cairo_format_t format,
+ int width,
+ int height)
+{
+ cairo_win32_display_surface_t *surface = abstract_other;
+ cairo_image_surface_t *image;
+
+ surface = (cairo_win32_display_surface_t *)
+ _cairo_win32_display_surface_create_for_dc (surface->win32.dc,
+ format, width, height);
+ if (surface->win32.base.status)
+ return &surface->win32.base;
+
+ /* And clear in order to comply with our user API semantics */
+ image = (cairo_image_surface_t *) surface->image;
+ if (! image->base.is_clear) {
+ memset (image->data, 0, image->stride * height);
+ image->base.is_clear = TRUE;
+ }
+
+ return &image->base;
+}
+
+static cairo_status_t
+_cairo_win32_display_surface_finish (void *abstract_surface)
+{
+ cairo_win32_display_surface_t *surface = abstract_surface;
+
+ if (surface->image && to_image_surface(surface->image)->parent) {
+ assert (to_image_surface(surface->image)->parent == &surface->win32.base);
+ /* Unhook ourselves first to avoid the double-unref from the image */
+ to_image_surface(surface->image)->parent = NULL;
+ cairo_surface_finish (surface->image);
+ cairo_surface_destroy (surface->image);
+ }
+
+ /* If we created the Bitmap and DC, destroy them */
+ if (surface->bitmap) {
+ SelectObject (surface->win32.dc, surface->saved_dc_bitmap);
+ DeleteObject (surface->bitmap);
+ DeleteDC (surface->win32.dc);
+ }
+
+ _cairo_win32_display_surface_discard_fallback (surface);
+
+ if (surface->initial_clip_rgn)
+ DeleteObject (surface->initial_clip_rgn);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_image_surface_t *
+_cairo_win32_display_surface_map_to_image (void *abstract_surface,
+ const cairo_rectangle_int_t *extents)
+{
+ cairo_win32_display_surface_t *surface = abstract_surface;
+ cairo_status_t status;
+
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, surface->win32.base.unique_id));
+
+ if (surface->image)
+ goto done;
+
+ if (surface->fallback == NULL) {
+ surface->fallback =
+ _cairo_win32_display_surface_create_for_dc (surface->win32.dc,
+ surface->win32.format,
+ surface->win32.extents.x + surface->win32.extents.width,
+ surface->win32.extents.y + surface->win32.extents.height);
+ if (unlikely (status = surface->fallback->status))
+ goto err;
+
+ if (!BitBlt (to_win32_surface(surface->fallback)->dc,
+ surface->win32.extents.x, surface->win32.extents.y,
+ surface->win32.extents.width,
+ surface->win32.extents.height,
+ surface->win32.dc,
+ surface->win32.extents.x + surface->win32.x_ofs, /* Handling multi-monitor... */
+ surface->win32.extents.y + surface->win32.y_ofs, /* ... setup on Win32 */
+ SRCCOPY)) {
+ status = _cairo_error (CAIRO_STATUS_DEVICE_ERROR);
+ goto err;
+ }
+ }
+
+ surface = to_win32_display_surface (surface->fallback);
+done:
+ GdiFlush();
+ return _cairo_surface_map_to_image (surface->image, extents);
+
+err:
+ cairo_surface_destroy (surface->fallback);
+ surface->fallback = NULL;
+
+ return _cairo_image_surface_create_in_error (status);
+}
+
+static cairo_int_status_t
+_cairo_win32_display_surface_unmap_image (void *abstract_surface,
+ cairo_image_surface_t *image)
+{
+ cairo_win32_display_surface_t *surface = abstract_surface;
+
+ /* Delay the download until the next flush, which means we also need
+ * to make sure our sources rare flushed.
+ */
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, to_win32_surface(surface)->base.unique_id));
+
+ if (surface->fallback) {
+ cairo_rectangle_int_t r;
+
+ r.x = image->base.device_transform_inverse.x0;
+ r.y = image->base.device_transform_inverse.y0;
+ r.width = image->width;
+ r.height = image->height;
+
+ TRACE ((stderr, "%s: adding damage (%d,%d)x(%d,%d)\n",
+ __FUNCTION__, r.x, r.y, r.width, r.height));
+ surface->fallback->damage =
+ _cairo_damage_add_rectangle (surface->fallback->damage, &r);
+ surface = to_win32_display_surface (surface->fallback);
+ }
+
+ return _cairo_surface_unmap_image (surface->image, image);
+}
+
+static cairo_status_t
+_cairo_win32_display_surface_flush (void *abstract_surface, unsigned flags)
+{
+ cairo_win32_display_surface_t *surface = abstract_surface;
+ cairo_status_t status = CAIRO_STATUS_SUCCESS;
+
+ if (flags)
+ return CAIRO_STATUS_SUCCESS;
+
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, surface->win32.base.unique_id));
+ if (surface->fallback == NULL)
+ return CAIRO_STATUS_SUCCESS;
+
+ if (surface->fallback->damage) {
+ cairo_win32_display_surface_t *fallback;
+ cairo_damage_t *damage;
+
+ damage = _cairo_damage_reduce (surface->fallback->damage);
+ surface->fallback->damage = NULL;
+
+ fallback = to_win32_display_surface (surface->fallback);
+ assert (fallback->image);
+
+ TRACE ((stderr, "%s: flushing damage x %d\n", __FUNCTION__,
+ damage->region ? cairo_region_num_rectangles (damage->region) : 0));
+
+ if (damage->status) {
+ if (!BitBlt (surface->win32.dc,
+ surface->win32.extents.x + surface->win32.x_ofs, /* Handling multi-monitor... */
+ surface->win32.extents.y + surface->win32.y_ofs, /* ... setup on Win32 */
+ surface->win32.extents.width,
+ surface->win32.extents.height,
+ fallback->win32.dc,
+ surface->win32.extents.x, surface->win32.extents.y,
+ SRCCOPY))
+ status = _cairo_win32_print_gdi_error (__FUNCTION__);
+ } else if (damage->region) {
+ int n = cairo_region_num_rectangles (damage->region), i;
+ for (i = 0; i < n; i++) {
+ cairo_rectangle_int_t rect;
+
+ cairo_region_get_rectangle (damage->region, i, &rect);
+ TRACE ((stderr, "%s: damage (%d,%d)x(%d,%d)\n", __FUNCTION__,
+ rect.x, rect.y,
+ rect.width, rect.height));
+ if (!BitBlt (surface->win32.dc,
+ rect.x + surface->win32.x_ofs, /* Handling multi-monitor... */
+ rect.y + surface->win32.y_ofs, /* ... setup on Win32 */
+ rect.width, rect.height,
+ fallback->win32.dc,
+ rect.x, rect.y,
+ SRCCOPY)) {
+ status = _cairo_win32_print_gdi_error (__FUNCTION__);
+ break;
+ }
+ }
+ }
+ _cairo_damage_destroy (damage);
+ } else {
+ cairo_surface_destroy (surface->fallback);
+ surface->fallback = NULL;
+ }
+
+ return status;
+}
+
+static cairo_status_t
+_cairo_win32_display_surface_mark_dirty (void *abstract_surface,
+ int x, int y, int width, int height)
+{
+ _cairo_win32_display_surface_discard_fallback (abstract_surface);
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+_cairo_win32_save_initial_clip (HDC hdc, cairo_win32_display_surface_t *surface)
+{
+ RECT rect;
+ int clipBoxType;
+ int gm;
+ XFORM saved_xform;
+
+ /* GetClipBox/GetClipRgn and friends interact badly with a world transform
+ * set. GetClipBox returns values in logical (transformed) coordinates;
+ * it's unclear what GetClipRgn returns, because the region is empty in the
+ * case of a SIMPLEREGION clip, but I assume device (untransformed) coordinates.
+ * Similarly, IntersectClipRect works in logical units, whereas SelectClipRgn
+ * works in device units.
+ *
+ * So, avoid the whole mess and get rid of the world transform
+ * while we store our initial data and when we restore initial coordinates.
+ *
+ * XXX we may need to modify x/y by the ViewportOrg or WindowOrg
+ * here in GM_COMPATIBLE; unclear.
+ */
+ gm = GetGraphicsMode (hdc);
+ if (gm == GM_ADVANCED) {
+ GetWorldTransform (hdc, &saved_xform);
+ ModifyWorldTransform (hdc, NULL, MWT_IDENTITY);
+ }
+
+ clipBoxType = GetClipBox (hdc, &rect);
+ if (clipBoxType == ERROR) {
+ _cairo_win32_print_gdi_error (__FUNCTION__);
+ SetGraphicsMode (hdc, gm);
+ /* XXX: Can we make a more reasonable guess at the error cause here? */
+ return _cairo_error (CAIRO_STATUS_DEVICE_ERROR);
+ }
+
+ surface->win32.extents.x = rect.left;
+ surface->win32.extents.y = rect.top;
+ surface->win32.extents.width = rect.right - rect.left;
+ surface->win32.extents.height = rect.bottom - rect.top;
+
+ /* On multi-monitor setup, under Windows, the primary monitor always
+ * have origin (0,0). Any monitors that extends to the left or above
+ * will have coordinates in the negative range. Take this into
+ * account, by forcing our Win32 surface to start at extent (0,0) and
+ * using a device offset. Cairo does not handle extents with negative
+ * offsets.
+ */
+ surface->win32.x_ofs = 0;
+ surface->win32.y_ofs = 0;
+ if ((surface->win32.extents.x < 0) ||
+ (surface->win32.extents.y < 0)) {
+ /* Negative offsets occurs for (and ONLY for) the desktop DC (virtual
+ * desktop), when a monitor extend to the left or above the primary
+ * monitor.
+ *
+ * More info @ https://www.microsoft.com/msj/0697/monitor/monitor.aspx
+ *
+ * Note that any other DC, including memory DC created with
+ * CreateCompatibleDC(<virtual desktop DC>) will have extents in the
+ * positive range. This will be taken into account later when we perform
+ * raster operations between the DC (may have to perform offset
+ * translation).
+ */
+ surface->win32.x_ofs = surface->win32.extents.x;
+ surface->win32.y_ofs = surface->win32.extents.y;
+ surface->win32.extents.x = 0;
+ surface->win32.extents.y = 0;
+ }
+
+ surface->initial_clip_rgn = NULL;
+ surface->had_simple_clip = FALSE;
+
+ if (clipBoxType == COMPLEXREGION) {
+ surface->initial_clip_rgn = CreateRectRgn (0, 0, 0, 0);
+ if (GetClipRgn (hdc, surface->initial_clip_rgn) <= 0) {
+ DeleteObject(surface->initial_clip_rgn);
+ surface->initial_clip_rgn = NULL;
+ }
+ } else if (clipBoxType == SIMPLEREGION) {
+ surface->had_simple_clip = TRUE;
+ }
+
+ if (gm == GM_ADVANCED)
+ SetWorldTransform (hdc, &saved_xform);
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+cairo_status_t
+_cairo_win32_display_surface_set_clip (cairo_win32_display_surface_t *surface,
+ cairo_clip_t *clip)
+{
+ char stack[512];
+ cairo_rectangle_int_t extents;
+ int num_rects;
+ RGNDATA *data;
+ size_t data_size;
+ RECT *rects;
+ int i;
+ HRGN gdi_region;
+ cairo_status_t status;
+ cairo_region_t *region;
+
+ /* The semantics we want is that any clip set by cairo combines
+ * is intersected with the clip on device context that the
+ * surface was created for. To implement this, we need to
+ * save the original clip when first setting a clip on surface.
+ */
+
+ assert (_cairo_clip_is_region (clip));
+ region = _cairo_clip_get_region (clip);
+ if (region == NULL)
+ return CAIRO_STATUS_SUCCESS;
+
+ cairo_region_get_extents (region, &extents);
+ num_rects = cairo_region_num_rectangles (region);
+
+ /* XXX see notes in _cairo_win32_save_initial_clip --
+ * this code will interact badly with a HDC which had an initial
+ * world transform -- we should probably manually transform the
+ * region rects, because SelectClipRgn takes device units, not
+ * logical units (unlike IntersectClipRect).
+ */
+
+ data_size = sizeof (RGNDATAHEADER) + num_rects * sizeof (RECT);
+ if (data_size > sizeof (stack)) {
+ data = _cairo_malloc (data_size);
+ if (!data)
+ return _cairo_error(CAIRO_STATUS_NO_MEMORY);
+ } else
+ data = (RGNDATA *)stack;
+
+ data->rdh.dwSize = sizeof (RGNDATAHEADER);
+ data->rdh.iType = RDH_RECTANGLES;
+ data->rdh.nCount = num_rects;
+ data->rdh.nRgnSize = num_rects * sizeof (RECT);
+ data->rdh.rcBound.left = extents.x;
+ data->rdh.rcBound.top = extents.y;
+ data->rdh.rcBound.right = extents.x + extents.width;
+ data->rdh.rcBound.bottom = extents.y + extents.height;
+
+ rects = (RECT *)data->Buffer;
+ for (i = 0; i < num_rects; i++) {
+ cairo_rectangle_int_t rect;
+
+ cairo_region_get_rectangle (region, i, &rect);
+
+ rects[i].left = rect.x;
+ rects[i].top = rect.y;
+ rects[i].right = rect.x + rect.width;
+ rects[i].bottom = rect.y + rect.height;
+ }
+
+ gdi_region = ExtCreateRegion (NULL, data_size, data);
+ if ((char *)data != stack)
+ free (data);
+
+ if (!gdi_region)
+ return _cairo_error (CAIRO_STATUS_NO_MEMORY);
+
+ /* AND the new region into our DC */
+ status = CAIRO_STATUS_SUCCESS;
+ if (ExtSelectClipRgn (surface->win32.dc, gdi_region, RGN_AND) == ERROR)
+ status = _cairo_win32_print_gdi_error (__FUNCTION__);
+
+ DeleteObject (gdi_region);
+
+ return status;
+}
+
+void
+_cairo_win32_display_surface_unset_clip (cairo_win32_display_surface_t *surface)
+{
+ XFORM saved_xform;
+ int gm = GetGraphicsMode (surface->win32.dc);
+ if (gm == GM_ADVANCED) {
+ GetWorldTransform (surface->win32.dc, &saved_xform);
+ ModifyWorldTransform (surface->win32.dc, NULL, MWT_IDENTITY);
+ }
+
+ /* initial_clip_rgn will either be a real region or NULL (which means reset to no clip region) */
+ SelectClipRgn (surface->win32.dc, surface->initial_clip_rgn);
+
+ if (surface->had_simple_clip) {
+ /* then if we had a simple clip, intersect */
+ IntersectClipRect (surface->win32.dc,
+ surface->win32.extents.x,
+ surface->win32.extents.y,
+ surface->win32.extents.x + surface->win32.extents.width,
+ surface->win32.extents.y + surface->win32.extents.height);
+ }
+
+ if (gm == GM_ADVANCED)
+ SetWorldTransform (surface->win32.dc, &saved_xform);
+}
+
+void
+_cairo_win32_display_surface_discard_fallback (cairo_win32_display_surface_t *surface)
+{
+ if (surface->fallback) {
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, surface->win32.base.unique_id));
+
+ cairo_surface_finish (surface->fallback);
+ cairo_surface_destroy (surface->fallback);
+ surface->fallback = NULL;
+ }
+}
+
+static cairo_int_status_t
+_cairo_win32_display_surface_paint (void *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_clip_t *clip)
+{
+ cairo_win32_device_t *device = to_win32_device_from_surface (surface);
+
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, to_win32_surface(surface)->base.unique_id));
+
+ if (clip == NULL &&
+ (op == CAIRO_OPERATOR_SOURCE || op == CAIRO_OPERATOR_CLEAR))
+ _cairo_win32_display_surface_discard_fallback (surface);
+
+ return _cairo_compositor_paint (device->compositor,
+ surface, op, source, clip);
+}
+
+static cairo_int_status_t
+_cairo_win32_display_surface_mask (void *surface,
+ cairo_operator_t op,
+ const cairo_pattern_t *source,
+ const cairo_pattern_t *mask,
+ const cairo_clip_t *clip)
+{
+ cairo_win32_device_t *device = to_win32_device_from_surface (surface);
+
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, to_win32_surface(surface)->base.unique_id));
+
+ if (clip == NULL && op == CAIRO_OPERATOR_SOURCE)
+ _cairo_win32_display_surface_discard_fallback (surface);
+
+ return _cairo_compositor_mask (device->compositor,
+ surface, op, source, mask, clip);
+}
+
+static cairo_int_status_t
+_cairo_win32_display_surface_stroke (void *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_win32_device_t *device = to_win32_device_from_surface (surface);
+
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, to_win32_surface(surface)->base.unique_id));
+
+ return _cairo_compositor_stroke (device->compositor, surface,
+ op, source, path,
+ style, ctm, ctm_inverse,
+ tolerance, antialias, clip);
+}
+
+static cairo_int_status_t
+_cairo_win32_display_surface_fill (void *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_win32_device_t *device = to_win32_device_from_surface (surface);
+
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, to_win32_surface(surface)->base.unique_id));
+
+ return _cairo_compositor_fill (device->compositor, surface,
+ op, source, path,
+ fill_rule, tolerance, antialias,
+ clip);
+}
+
+static cairo_int_status_t
+_cairo_win32_display_surface_glyphs (void *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)
+{
+ cairo_win32_device_t *device = to_win32_device_from_surface (surface);
+
+ TRACE ((stderr, "%s (surface=%d)\n",
+ __FUNCTION__, to_win32_surface(surface)->base.unique_id));
+
+ return _cairo_compositor_glyphs (device->compositor, surface,
+ op, source,
+ glyphs, num_glyphs, scaled_font,
+ clip);
+}
+
+static const cairo_surface_backend_t cairo_win32_display_surface_backend = {
+ CAIRO_SURFACE_TYPE_WIN32,
+ _cairo_win32_display_surface_finish,
+
+ _cairo_default_context_create,
+
+ _cairo_win32_display_surface_create_similar,
+ _cairo_win32_display_surface_create_similar_image,
+ _cairo_win32_display_surface_map_to_image,
+ _cairo_win32_display_surface_unmap_image,
+
+ _cairo_surface_default_source,
+ _cairo_surface_default_acquire_source_image,
+ _cairo_surface_default_release_source_image,
+ NULL, /* snapshot */
+
+ NULL, /* copy_page */
+ NULL, /* show_page */
+
+ _cairo_win32_surface_get_extents,
+ NULL, /* get_font_options */
+
+ _cairo_win32_display_surface_flush,
+ _cairo_win32_display_surface_mark_dirty,
+
+ _cairo_win32_display_surface_paint,
+ _cairo_win32_display_surface_mask,
+ _cairo_win32_display_surface_stroke,
+ _cairo_win32_display_surface_fill,
+ NULL, /* fill/stroke */
+ _cairo_win32_display_surface_glyphs,
+};
+
+/* Notes:
+ *
+ * Win32 alpha-understanding functions
+ *
+ * BitBlt - will copy full 32 bits from a 32bpp DIB to result
+ * (so it's safe to use for ARGB32->ARGB32 SOURCE blits)
+ * (but not safe going RGB24->ARGB32, if RGB24 is also represented
+ * as a 32bpp DIB, since the alpha isn't discarded!)
+ *
+ * AlphaBlend - if both the source and dest have alpha, even if AC_SRC_ALPHA isn't set,
+ * it will still copy over the src alpha, because the SCA value (255) will be
+ * multiplied by all the src components.
+ */
+
+/**
+ * cairo_win32_surface_create_with_format:
+ * @hdc: the DC to create a surface for
+ * @format: format of pixels in the surface to create
+ *
+ * Creates a cairo surface that targets the given DC. The DC will be
+ * queried for its initial clip extents, and this will be used as the
+ * size of the cairo surface.
+ *
+ * Supported formats are:
+ * %CAIRO_FORMAT_ARGB32
+ * %CAIRO_FORMAT_RGB24
+ *
+ * Note: @format only tells cairo how to draw on the surface, not what
+ * the format of the surface is. Namely, cairo does not (and cannot)
+ * check that @hdc actually supports alpha-transparency.
+ *
+ * Return value: the newly created surface, NULL on failure
+ *
+ * Since: 1.14
+ **/
+cairo_surface_t *
+cairo_win32_surface_create_with_format (HDC hdc, cairo_format_t format)
+{
+ cairo_win32_display_surface_t *surface;
+
+ cairo_status_t status;
+ cairo_device_t *device;
+
+ switch (format) {
+ default:
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT));
+ case CAIRO_FORMAT_ARGB32:
+ case CAIRO_FORMAT_RGB24:
+ break;
+ }
+
+ surface = _cairo_malloc (sizeof (*surface));
+ if (surface == NULL)
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+
+ status = _cairo_win32_save_initial_clip (hdc, surface);
+ if (status) {
+ free (surface);
+ return _cairo_surface_create_in_error (status);
+ }
+
+ surface->image = NULL;
+ surface->fallback = NULL;
+ surface->win32.format = format;
+
+ surface->win32.dc = hdc;
+ surface->bitmap = NULL;
+ surface->is_dib = FALSE;
+ surface->saved_dc_bitmap = NULL;
+
+ surface->win32.flags = _cairo_win32_flags_for_dc (surface->win32.dc, format);
+
+ device = _cairo_win32_device_get ();
+
+ _cairo_surface_init (&surface->win32.base,
+ &cairo_win32_display_surface_backend,
+ device,
+ _cairo_content_from_format (format),
+ FALSE); /* is_vector */
+
+ cairo_device_destroy (device);
+
+ return &surface->win32.base;
+}
+
+/**
+ * cairo_win32_surface_create:
+ * @hdc: the DC to create a surface for
+ *
+ * Creates a cairo surface that targets the given DC. The DC will be
+ * queried for its initial clip extents, and this will be used as the
+ * size of the cairo surface. The resulting surface will always be of
+ * format %CAIRO_FORMAT_RGB24; should you need another surface format,
+ * you will need to create one through
+ * cairo_win32_surface_create_with_format() or
+ * cairo_win32_surface_create_with_dib().
+ *
+ * Return value: the newly created surface, NULL on failure
+ *
+ * Since: 1.0
+ **/
+cairo_surface_t *
+cairo_win32_surface_create (HDC hdc)
+{
+ return cairo_win32_surface_create_with_format (hdc, CAIRO_FORMAT_RGB24);
+}
+
+/**
+ * cairo_win32_surface_create_with_dib:
+ * @format: format of pixels in the surface to create
+ * @width: width of the surface, in pixels
+ * @height: height of the surface, in pixels
+ *
+ * Creates a device-independent-bitmap surface not associated with
+ * any particular existing surface or device context. The created
+ * bitmap will be uninitialized.
+ *
+ * Return value: the newly created surface
+ *
+ * Since: 1.2
+ **/
+cairo_surface_t *
+cairo_win32_surface_create_with_dib (cairo_format_t format,
+ int width,
+ int height)
+{
+ if (! CAIRO_FORMAT_VALID (format))
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT));
+
+ return _cairo_win32_display_surface_create_for_dc (NULL, format, width, height);
+}
+
+/**
+ * cairo_win32_surface_create_with_ddb:
+ * @hdc: a DC compatible with the surface to create
+ * @format: format of pixels in the surface to create
+ * @width: width of the surface, in pixels
+ * @height: height of the surface, in pixels
+ *
+ * Creates a device-dependent-bitmap surface not associated with
+ * any particular existing surface or device context. The created
+ * bitmap will be uninitialized.
+ *
+ * Return value: the newly created surface
+ *
+ * Since: 1.4
+ **/
+cairo_surface_t *
+cairo_win32_surface_create_with_ddb (HDC hdc,
+ cairo_format_t format,
+ int width,
+ int height)
+{
+ cairo_win32_display_surface_t *new_surf;
+ HBITMAP ddb;
+ HDC screen_dc, ddb_dc;
+ HBITMAP saved_dc_bitmap;
+
+ switch (format) {
+ default:
+/* XXX handle these eventually */
+ case CAIRO_FORMAT_A8:
+ case CAIRO_FORMAT_A1:
+ return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT));
+ case CAIRO_FORMAT_ARGB32:
+ case CAIRO_FORMAT_RGB24:
+ break;
+ }
+
+ if (!hdc) {
+ screen_dc = GetDC (NULL);
+ hdc = screen_dc;
+ } else {
+ screen_dc = NULL;
+ }
+
+ ddb_dc = CreateCompatibleDC (hdc);
+ if (ddb_dc == NULL) {
+ new_surf = (cairo_win32_display_surface_t*) _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+ goto FINISH;
+ }
+
+ ddb = CreateCompatibleBitmap (hdc, width, height);
+ if (ddb == NULL) {
+ DeleteDC (ddb_dc);
+
+ /* Note that if an app actually does hit this out of memory
+ * condition, it's going to have lots of other issues, as
+ * video memory is probably exhausted. However, it can often
+ * continue using DIBs instead of DDBs.
+ */
+ new_surf = (cairo_win32_display_surface_t*) _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
+ goto FINISH;
+ }
+
+ saved_dc_bitmap = SelectObject (ddb_dc, ddb);
+
+ new_surf = (cairo_win32_display_surface_t*) cairo_win32_surface_create (ddb_dc);
+ new_surf->bitmap = ddb;
+ new_surf->saved_dc_bitmap = saved_dc_bitmap;
+ new_surf->is_dib = FALSE;
+
+FINISH:
+ if (screen_dc)
+ ReleaseDC (NULL, screen_dc);
+
+ return &new_surf->win32.base;
+}