apple_visual.c revision 4c9bab78a118953baf307e31cd53e731299f0151 
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#undef glTexImage1D
44#undef glTexImage2D
45#undef glTexImage3D
46
47#include "apple_cgl.h"
48#include "apple_visual.h"
49#include "apple_glx.h"
50#include "glxconfig.h"
51
52enum
53{
54   MAX_ATTR = 60
55};
56
57/*mode is a __GlcontextModes*/
58void
59apple_visual_create_pfobj(CGLPixelFormatObj * pfobj, const void *mode,
60                          bool * double_buffered, bool * uses_stereo,
61                          bool offscreen)
62{
63   CGLPixelFormatAttribute attr[MAX_ATTR];
64   const struct glx_config *c = mode;
65   int numattr = 0;
66   GLint vsref = 0;
67   CGLError error = 0;
68
69   if (offscreen) {
70      apple_glx_diagnostic
71         ("offscreen rendering enabled.  Using kCGLPFAOffScreen\n");
72
73      attr[numattr++] = kCGLPFAOffScreen;
74      attr[numattr++] = kCGLPFAColorSize;
75      attr[numattr++] = 32;
76   }
77   else if (getenv("LIBGL_ALWAYS_SOFTWARE") != NULL) {
78      apple_glx_diagnostic
79         ("Software rendering requested.  Using kCGLRendererGenericFloatID.\n");
80      attr[numattr++] = kCGLPFARendererID;
81      attr[numattr++] = kCGLRendererGenericFloatID;
82   }
83   else if (getenv("LIBGL_ALLOW_SOFTWARE") != NULL) {
84      apple_glx_diagnostic
85         ("Software rendering is not being excluded.  Not using kCGLPFAAccelerated.\n");
86   }
87   else {
88      attr[numattr++] = kCGLPFAAccelerated;
89   }
90
91   /*
92    * The program chose a config based on the fbconfigs or visuals.
93    * Those are based on the attributes from CGL, so we probably
94    * do want the closest match for the color, depth, and accum.
95    */
96   attr[numattr++] = kCGLPFAClosestPolicy;
97
98   if (c->stereoMode) {
99      attr[numattr++] = kCGLPFAStereo;
100      *uses_stereo = true;
101   }
102   else {
103      *uses_stereo = false;
104   }
105
106   if (c->doubleBufferMode) {
107      attr[numattr++] = kCGLPFADoubleBuffer;
108      *double_buffered = true;
109   }
110   else {
111      *double_buffered = false;
112   }
113
114   attr[numattr++] = kCGLPFAColorSize;
115   attr[numattr++] = c->redBits + c->greenBits + c->blueBits;
116   attr[numattr++] = kCGLPFAAlphaSize;
117   attr[numattr++] = c->alphaBits;
118
119   if ((c->accumRedBits + c->accumGreenBits + c->accumBlueBits) > 0) {
120      attr[numattr++] = kCGLPFAAccumSize;
121      attr[numattr++] = c->accumRedBits + c->accumGreenBits +
122         c->accumBlueBits + c->accumAlphaBits;
123   }
124
125   if (c->depthBits > 0) {
126      attr[numattr++] = kCGLPFADepthSize;
127      attr[numattr++] = c->depthBits;
128   }
129
130   if (c->stencilBits > 0) {
131      attr[numattr++] = kCGLPFAStencilSize;
132      attr[numattr++] = c->stencilBits;
133   }
134
135   if (c->sampleBuffers > 0) {
136      attr[numattr++] = kCGLPFAMultisample;
137      attr[numattr++] = kCGLPFASampleBuffers;
138      attr[numattr++] = c->sampleBuffers;
139      attr[numattr++] = kCGLPFASamples;
140      attr[numattr++] = c->samples;
141   }
142
143   attr[numattr++] = 0;
144
145   assert(numattr < MAX_ATTR);
146
147   error = apple_cgl.choose_pixel_format(attr, pfobj, &vsref);
148
149   if (error) {
150      fprintf(stderr, "error: %s\n", apple_cgl.error_string(error));
151      abort();
152   }
153}
154