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/* -*- 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);
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 = 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->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));
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.extents.y,
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,
0, 0,
surface->win32.extents.width,
surface->win32.extents.height,
fallback->win32.dc,
0, 0,
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, rect.y,
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;
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 = 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:
* @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_dib().
*
* Return value: the newly created surface
*
* Since: 1.0
**/
cairo_surface_t *
cairo_win32_surface_create (HDC hdc)
{
cairo_win32_display_surface_t *surface;
cairo_format_t format;
cairo_status_t status;
cairo_device_t *device;
/* Assume that everything coming in as a HDC is RGB24 */
format = CAIRO_FORMAT_RGB24;
surface = 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);
device = _cairo_win32_device_get ();
_cairo_surface_init (&surface->win32.base,
&cairo_win32_display_surface_backend,
device,
_cairo_content_from_format (format));
cairo_device_destroy (device);
return &surface->win32.base;
}
/**
* 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;
if (format != CAIRO_FORMAT_RGB24)
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT));
/* XXX handle these eventually
format != CAIRO_FORMAT_A8 ||
format != CAIRO_FORMAT_A1)
*/
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;
}