1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
|
/* 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,
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,
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)
|
