src/glx/apple/apple_visual.c

   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
  61 enum
  62 {
  63    MAX_ATTR = 60
  64 };
  65
  66 void
  67 apple_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 }