1 /*
2 Copyright (c) 2003-2012 Sony Pictures Imageworks Inc., et al.
3 All Rights Reserved.
4
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are
7 met:
8 * Redistributions of source code must retain the above copyright
9 notice, this list of conditions and the following disclaimer.
10 * Redistributions in binary form must reproduce the above copyright
11 notice, this list of conditions and the following disclaimer in the
12 documentation and/or other materials provided with the distribution.
13 * Neither the name of Sony Pictures Imageworks nor the names of its
14 contributors may be used to endorse or promote products derived from
15 this software without specific prior written permission.
16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29
30 #include "OpenColorIO_AE_GL.h"
31
32 #include <windows.h>
33 #include <stdlib.h>
34 #include <stdio.h>
35
36 static HWND g_win = NULL;
37 static HDC g_hdc = NULL;
38 static HGLRC g_context = NULL;
39 static GLuint g_framebuffer = GL_INVALID_VALUE;
40
41
HaveRequiredExtensions()42 static bool HaveRequiredExtensions()
43 {
44 const GLubyte *strVersion = glGetString(GL_VERSION);
45 const GLubyte *strExt = glGetString(GL_EXTENSIONS);
46
47 if(strVersion == NULL)
48 return false;
49
50 #define CheckExtension(N) glewIsExtensionSupported(N)
51
52 return (GLEW_VERSION_2_0 &&
53 CheckExtension("GL_ARB_color_buffer_float") &&
54 CheckExtension("GL_ARB_texture_float") &&
55 CheckExtension("GL_ARB_vertex_program") &&
56 CheckExtension("GL_ARB_vertex_shader") &&
57 CheckExtension("GL_ARB_texture_cube_map") &&
58 CheckExtension("GL_ARB_fragment_shader") &&
59 CheckExtension("GL_ARB_draw_buffers") &&
60 CheckExtension("GL_ARB_framebuffer_object") );
61 }
62
63
GlobalSetup_GL()64 void GlobalSetup_GL()
65 {
66 GLenum init = glewInit();
67
68 if(init != GLEW_OK)
69 return;
70
71
72 WNDCLASSEX winClass;
73 MSG uMsg;
74
75 memset(&uMsg,0,sizeof(uMsg));
76
77 winClass.lpszClassName = "OpenColorIO_AE_Win_Class";
78 winClass.cbSize = sizeof(WNDCLASSEX);
79 winClass.style = CS_HREDRAW | CS_VREDRAW;
80 winClass.lpfnWndProc = DefWindowProc;
81 winClass.hInstance = NULL;
82 winClass.hIcon = NULL;
83 winClass.hIconSm = NULL;
84 winClass.hCursor = LoadCursor(NULL, IDC_ARROW);
85 winClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
86 winClass.lpszMenuName = NULL;
87 winClass.cbClsExtra = 0;
88 winClass.cbWndExtra = 0;
89
90 if( !( RegisterClassEx(&winClass) ) )
91 return;
92
93 g_win = CreateWindowEx( NULL, "OpenColorIO_AE_Win_Class",
94 "OpenGL-using FBOs in AE",
95 0, 0,
96 0, 50, 50,
97 NULL,
98 NULL,
99 NULL,
100 NULL );
101
102 if(g_win == NULL)
103 return;
104
105 g_hdc = GetDC(g_win);
106
107
108 int pixelFormat;
109
110 PIXELFORMATDESCRIPTOR pfd;
111 ZeroMemory( &pfd, sizeof( pfd ) );
112
113 pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
114 pfd.nVersion = 1;
115 pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
116 pfd.iPixelType = PFD_TYPE_RGBA;
117 pfd.cColorBits = 128;
118 pfd.cDepthBits = 32;
119 pfd.cStencilBits = 32;
120 pfd.iLayerType = PFD_MAIN_PLANE;
121
122 pixelFormat = ChoosePixelFormat(g_hdc, &pfd);
123
124 BOOL set_format = SetPixelFormat(g_hdc, pixelFormat, &pfd);
125
126 if(!set_format)
127 {
128 GlobalSetdown_GL();
129 return;
130 }
131
132 g_context = wglCreateContext(g_hdc);
133
134 glFlush();
135
136 if(g_context == NULL)
137 {
138 GlobalSetdown_GL();
139 return;
140 }
141
142
143 SetPluginContext();
144
145
146 GLint units;
147 glGetIntegerv(GL_MAX_TEXTURE_UNITS, &units);
148
149
150 if( !HaveRequiredExtensions() || units < 2)
151 {
152 GlobalSetdown_GL();
153 SetAEContext();
154 return;
155 }
156
157 glGenFramebuffersEXT(1, &g_framebuffer);
158
159
160 SetAEContext();
161 }
162
163
HaveOpenGL()164 bool HaveOpenGL()
165 {
166 return (g_context != NULL && g_win != NULL);
167 }
168
169
170 static HDC g_ae_hdc;
171 static HGLRC g_ae_context;
172
SetPluginContext()173 void SetPluginContext()
174 {
175 g_ae_hdc = wglGetCurrentDC();
176 g_ae_context = wglGetCurrentContext();
177
178 wglMakeCurrent(g_hdc, g_context);
179 }
180
181
SetAEContext()182 void SetAEContext()
183 {
184 wglMakeCurrent(g_ae_hdc, g_ae_context);
185 }
186
187
GetFrameBuffer()188 GLuint GetFrameBuffer()
189 {
190 return g_framebuffer;
191 }
192
193
GlobalSetdown_GL()194 void GlobalSetdown_GL()
195 {
196 if(g_framebuffer != GL_INVALID_VALUE)
197 {
198 glDeleteFramebuffersEXT(1, &g_framebuffer);
199 g_framebuffer = GL_INVALID_VALUE;
200 }
201
202 if(g_context)
203 {
204 wglDeleteContext(g_context);
205 g_context = NULL;
206 }
207
208 if(g_win)
209 {
210 ReleaseDC(g_win, g_hdc);
211 g_win = NULL;
212 g_hdc = NULL;
213
214 UnregisterClass("OpenColorIO_AE_Win_Class", NULL);
215 }
216 }
217