1/*
2 Copyright (c) 2008, 2009 Apple Inc.
3
4 Permission is hereby granted, free of charge, to any person
5 obtaining a copy of this software and associated documentation files
6 (the "Software"), to deal in the Software without restriction,
7 including without limitation the rights to use, copy, modify, merge,
8 publish, distribute, sublicense, and/or sell copies of the Software,
9 and to permit persons to whom the Software is furnished to do so,
10 subject to the following conditions:
11
12 The above copyright notice and this permission notice shall be
13 included in all copies or substantial portions of the Software.
14
15 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
18 NONINFRINGEMENT.  IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT
19 HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
20 WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 DEALINGS IN THE SOFTWARE.
23
24 Except as contained in this notice, the name(s) of the above
25 copyright holders shall not be used in advertising or otherwise to
26 promote the sale, use or other dealings in this Software without
27 prior written authorization.
28*/
29
30#include <stdbool.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <assert.h>
34#include <GL/gl.h>
35
36/* <rdar://problem/6953344> */
37#define glTexImage1D glTexImage1D_OSX
38#define glTexImage2D glTexImage2D_OSX
39#define glTexImage3D glTexImage3D_OSX
40#include <OpenGL/OpenGL.h>
41#include <OpenGL/CGLContext.h>
42#include <OpenGL/CGLRenderers.h>
43#include <OpenGL/CGLTypes.h>
44#undef glTexImage1D
45#undef glTexImage2D
46#undef glTexImage3D
47
48#ifndef kCGLPFAOpenGLProfile
49#define kCGLPFAOpenGLProfile 99
50#endif
51
52#ifndef kCGLOGLPVersion_3_2_Core
53#define kCGLOGLPVersion_3_2_Core 0x3200
54#endif
55
56#include "apple_cgl.h"
57#include "apple_visual.h"
58#include "apple_glx.h"
59#include "glxconfig.h"
60
61enum
62{
63   MAX_ATTR = 60
64};
65
66void
67apple_visual_create_pfobj(CGLPixelFormatObj * pfobj, const struct glx_config * mode,
68                          bool * double_buffered, bool * uses_stereo,
69                          bool offscreen)
70{
71   CGLPixelFormatAttribute attr[MAX_ATTR];
72   int numattr = 0;
73   GLint vsref = 0;
74   CGLError error = 0;
75
76   /* Request an OpenGL 3.2 profile if one is available */
77   if(apple_cgl.version_major > 1 || (apple_cgl.version_major == 1 && apple_cgl.version_minor >= 3)) {
78      attr[numattr++] = kCGLPFAOpenGLProfile;
79      attr[numattr++] = kCGLOGLPVersion_3_2_Core;
80   }
81
82   if (offscreen) {
83      apple_glx_diagnostic
84         ("offscreen rendering enabled.  Using kCGLPFAOffScreen\n");
85
86      attr[numattr++] = kCGLPFAOffScreen;
87      attr[numattr++] = kCGLPFAColorSize;
88      attr[numattr++] = 32;
89   }
90   else if (getenv("LIBGL_ALWAYS_SOFTWARE") != NULL) {
91      apple_glx_diagnostic
92         ("Software rendering requested.  Using kCGLRendererGenericFloatID.\n");
93      attr[numattr++] = kCGLPFARendererID;
94      attr[numattr++] = kCGLRendererGenericFloatID;
95   }
96   else if (getenv("LIBGL_ALLOW_SOFTWARE") != NULL) {
97      apple_glx_diagnostic
98         ("Software rendering is not being excluded.  Not using kCGLPFAAccelerated.\n");
99   }
100   else {
101      attr[numattr++] = kCGLPFAAccelerated;
102   }
103
104   /*
105    * The program chose a config based on the fbconfigs or visuals.
106    * Those are based on the attributes from CGL, so we probably
107    * do want the closest match for the color, depth, and accum.
108    */
109   attr[numattr++] = kCGLPFAClosestPolicy;
110
111   if (mode->stereoMode) {
112      attr[numattr++] = kCGLPFAStereo;
113      *uses_stereo = true;
114   }
115   else {
116      *uses_stereo = false;
117   }
118
119   if (!offscreen && mode->doubleBufferMode) {
120      attr[numattr++] = kCGLPFADoubleBuffer;
121      *double_buffered = true;
122   }
123   else {
124      *double_buffered = false;
125   }
126
127   attr[numattr++] = kCGLPFAColorSize;
128   attr[numattr++] = mode->redBits + mode->greenBits + mode->blueBits;
129   attr[numattr++] = kCGLPFAAlphaSize;
130   attr[numattr++] = mode->alphaBits;
131
132   if ((mode->accumRedBits + mode->accumGreenBits + mode->accumBlueBits) > 0) {
133      attr[numattr++] = kCGLPFAAccumSize;
134      attr[numattr++] = mode->accumRedBits + mode->accumGreenBits +
135         mode->accumBlueBits + mode->accumAlphaBits;
136   }
137
138   if (mode->depthBits > 0) {
139      attr[numattr++] = kCGLPFADepthSize;
140      attr[numattr++] = mode->depthBits;
141   }
142
143   if (mode->stencilBits > 0) {
144      attr[numattr++] = kCGLPFAStencilSize;
145      attr[numattr++] = mode->stencilBits;
146   }
147
148   if (mode->sampleBuffers > 0) {
149      attr[numattr++] = kCGLPFAMultisample;
150      attr[numattr++] = kCGLPFASampleBuffers;
151      attr[numattr++] = mode->sampleBuffers;
152      attr[numattr++] = kCGLPFASamples;
153      attr[numattr++] = mode->samples;
154   }
155
156   attr[numattr++] = 0;
157
158   assert(numattr < MAX_ATTR);
159
160   error = apple_cgl.choose_pixel_format(attr, pfobj, &vsref);
161
162   if (error) {
163      fprintf(stderr, "error: %s\n", apple_cgl.error_string(error));
164      abort();
165   }
166}
167