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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Chris Wilson
*
* 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 Chris Wilson.
*
* Contributor(s):
* Zoxc <zoxc32@gmail.com>
*/
#include "cairo-boilerplate-private.h"
#include <cairo-gl.h>
static const cairo_user_data_key_t gl_closure_key;
typedef struct _wgl_target_closure {
HWND wnd;
HDC dc;
HGLRC rc;
cairo_device_t *device;
cairo_surface_t *surface;
} wgl_target_closure_t;
static void
_cairo_boilerplate_wgl_cleanup (void *closure)
{
wgl_target_closure_t *wgltc = closure;
cairo_device_finish (wgltc->device);
cairo_device_destroy (wgltc->device);
wglDeleteContext(wgltc->rc);
ReleaseDC(wgltc->wnd, wgltc->dc);
DestroyWindow (wgltc->wnd);
free (wgltc);
}
static void
_cairo_boilerplate_wgl_create_window (int width,
int height,
wgl_target_closure_t *wgltc)
{
WNDCLASSEXA wincl;
PIXELFORMATDESCRIPTOR pfd;
int format;
cairo_surface_t *surface;
ZeroMemory (&wincl, sizeof (WNDCLASSEXA));
wincl.cbSize = sizeof (WNDCLASSEXA);
wincl.hInstance = GetModuleHandle (0);
wincl.lpszClassName = "cairo_boilerplate_wgl_dummy";
wincl.lpfnWndProc = DefWindowProcA;
wincl.style = CS_OWNDC;
RegisterClassExA (&wincl);
wgltc->wnd = CreateWindow ("cairo_boilerplate_wgl_dummy", 0, WS_POPUP, 0, 0, width, height, 0, 0, 0, 0);
wgltc->dc = GetDC (wgltc->wnd);
ZeroMemory (&pfd, sizeof (PIXELFORMATDESCRIPTOR));
pfd.nSize = sizeof (PIXELFORMATDESCRIPTOR);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
format = ChoosePixelFormat (wgltc->dc, &pfd);
SetPixelFormat (wgltc->dc, format, &pfd);
wgltc->rc = wglCreateContext (wgltc->dc);
wgltc->device = cairo_wgl_device_create (wgltc->rc);
}
static cairo_surface_t *
_cairo_boilerplate_wgl_create_surface (const char *name,
cairo_content_t content,
double width,
double height,
double max_width,
double max_height,
cairo_boilerplate_mode_t mode,
int id,
void **closure)
{
wgl_target_closure_t *wgltc;
cairo_surface_t *surface;
wgltc = calloc (1, sizeof (wgl_target_closure_t));
*closure = wgltc;
_cairo_boilerplate_wgl_create_window(0, 0, wgltc);
if (width == 0)
width = 1;
if (height == 0)
height = 1;
wgltc->surface = surface = cairo_gl_surface_create (wgltc->device,
content,
ceil (width),
ceil (height));
if (cairo_surface_status (surface)) {
_cairo_boilerplate_wgl_cleanup (wgltc);
return NULL;
}
return surface;
}
static cairo_surface_t *
_cairo_boilerplate_wgl_for_create_window (const char *name,
cairo_content_t content,
double width,
double height,
double max_width,
double max_height,
cairo_boilerplate_mode_t mode,
int id,
void **closure)
{
wgl_target_closure_t *wgltc;
cairo_surface_t *surface;
wgltc = calloc (1, sizeof (wgl_target_closure_t));
*closure = wgltc;
_cairo_boilerplate_wgl_create_window(width, height, wgltc);
wgltc->surface = surface = cairo_gl_surface_create_for_dc (wgltc->device,
wgltc->dc,
ceil (width),
ceil (height));
if (cairo_surface_status (surface)) {
_cairo_boilerplate_wgl_cleanup (wgltc);
return NULL;
}
return surface;
}
static cairo_status_t
_cairo_boilerplate_wgl_finish_window (cairo_surface_t *surface)
{
wgl_target_closure_t *wgltc = cairo_surface_get_user_data (surface,
&gl_closure_key);
if (wgltc != NULL && wgltc->surface != NULL) {
cairo_t *cr;
cr = cairo_create (wgltc->surface);
cairo_surface_set_device_offset (surface, 0, 0);
cairo_set_source_surface (cr, surface, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_destroy (cr);
surface = wgltc->surface;
}
cairo_gl_surface_swapbuffers (surface);
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_boilerplate_wgl_synchronize (void *closure)
{
wgl_target_closure_t *wgltc = closure;
if (cairo_device_acquire (wgltc->device))
return;
glFinish ();
cairo_device_release (wgltc->device);
}
static const cairo_boilerplate_target_t targets[] = {
{
"gl", "gl", NULL, NULL,
CAIRO_SURFACE_TYPE_GL, CAIRO_CONTENT_COLOR_ALPHA, 1,
"cairo_gl_surface_create",
_cairo_boilerplate_wgl_create_surface,
cairo_surface_create_similar,
NULL, NULL,
_cairo_boilerplate_get_image_surface,
cairo_surface_write_to_png,
_cairo_boilerplate_wgl_cleanup,
_cairo_boilerplate_wgl_synchronize,
NULL,
TRUE, FALSE, FALSE
},
{
"gl-dc", "gl", NULL, NULL,
CAIRO_SURFACE_TYPE_GL, CAIRO_CONTENT_COLOR_ALPHA, 1,
"cairo_gl_surface_create_for_dc",
_cairo_boilerplate_wgl_for_create_window,
NULL,
_cairo_boilerplate_wgl_finish_window,
_cairo_boilerplate_get_image_surface,
cairo_surface_write_to_png,
_cairo_boilerplate_wgl_cleanup,
_cairo_boilerplate_wgl_synchronize,
NULL,
FALSE, FALSE, FALSE
},
};
CAIRO_BOILERPLATE (wgl, targets)
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