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  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. static char __crashreporter_info_buff__[4096] = { 0 };
  67. static const char *__crashreporter_info__ __attribute__((__used__)) =
  68.     &__crashreporter_info_buff__[0];
  69. #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1050
  70. // This is actually a toolchain requirement, but I'm not sure the correct check,
  71. // but it should be fine to just only include it for Leopard and later.  This line
  72. // just tells the linker to never strip this symbol (such as for space optimization)
  73. __asm__ (".desc ___crashreporter_info__, 0x10");
  74. #endif
  75.  
  76. void
  77. apple_visual_create_pfobj(CGLPixelFormatObj * pfobj, const struct glx_config * mode,
  78.                           bool * double_buffered, bool * uses_stereo,
  79.                           bool offscreen)
  80. {
  81.    CGLPixelFormatAttribute attr[MAX_ATTR];
  82.    int numattr = 0;
  83.    GLint vsref = 0;
  84.    CGLError error = 0;
  85.    bool use_core_profile = getenv("LIBGL_PROFILE_CORE");
  86.  
  87.    if (offscreen) {
  88.       apple_glx_diagnostic
  89.          ("offscreen rendering enabled.  Using kCGLPFAOffScreen\n");
  90.  
  91.       attr[numattr++] = kCGLPFAOffScreen;
  92.    }
  93.    else if (getenv("LIBGL_ALWAYS_SOFTWARE") != NULL) {
  94.       apple_glx_diagnostic
  95.          ("Software rendering requested.  Using kCGLRendererGenericFloatID.\n");
  96.       attr[numattr++] = kCGLPFARendererID;
  97.       attr[numattr++] = kCGLRendererGenericFloatID;
  98.    }
  99.    else if (getenv("LIBGL_ALLOW_SOFTWARE") != NULL) {
  100.       apple_glx_diagnostic
  101.          ("Software rendering is not being excluded.  Not using kCGLPFAAccelerated.\n");
  102.    }
  103.    else {
  104.       attr[numattr++] = kCGLPFAAccelerated;
  105.    }
  106.  
  107.    /*
  108.     * The program chose a config based on the fbconfigs or visuals.
  109.     * Those are based on the attributes from CGL, so we probably
  110.     * do want the closest match for the color, depth, and accum.
  111.     */
  112.    attr[numattr++] = kCGLPFAClosestPolicy;
  113.  
  114.    if (mode->stereoMode) {
  115.       attr[numattr++] = kCGLPFAStereo;
  116.       *uses_stereo = true;
  117.    }
  118.    else {
  119.       *uses_stereo = false;
  120.    }
  121.  
  122.    if (!offscreen && mode->doubleBufferMode) {
  123.       attr[numattr++] = kCGLPFADoubleBuffer;
  124.       *double_buffered = true;
  125.    }
  126.    else {
  127.       *double_buffered = false;
  128.    }
  129.  
  130.    attr[numattr++] = kCGLPFAColorSize;
  131.    attr[numattr++] = mode->redBits + mode->greenBits + mode->blueBits;
  132.    attr[numattr++] = kCGLPFAAlphaSize;
  133.    attr[numattr++] = mode->alphaBits;
  134.  
  135.    if ((mode->accumRedBits + mode->accumGreenBits + mode->accumBlueBits) > 0) {
  136.       attr[numattr++] = kCGLPFAAccumSize;
  137.       attr[numattr++] = mode->accumRedBits + mode->accumGreenBits +
  138.          mode->accumBlueBits + mode->accumAlphaBits;
  139.    }
  140.  
  141.    if (mode->depthBits > 0) {
  142.       attr[numattr++] = kCGLPFADepthSize;
  143.       attr[numattr++] = mode->depthBits;
  144.    }
  145.  
  146.    if (mode->stencilBits > 0) {
  147.       attr[numattr++] = kCGLPFAStencilSize;
  148.       attr[numattr++] = mode->stencilBits;
  149.    }
  150.  
  151.    if (mode->sampleBuffers > 0) {
  152.       attr[numattr++] = kCGLPFAMultisample;
  153.       attr[numattr++] = kCGLPFASampleBuffers;
  154.       attr[numattr++] = mode->sampleBuffers;
  155.       attr[numattr++] = kCGLPFASamples;
  156.       attr[numattr++] = mode->samples;
  157.    }
  158.  
  159.    /* Debugging support for Core profiles to support newer versions of OpenGL */
  160.    if (use_core_profile) {
  161.       attr[numattr++] = kCGLPFAOpenGLProfile;
  162.       attr[numattr++] = kCGLOGLPVersion_3_2_Core;
  163.    }
  164.  
  165.    attr[numattr++] = 0;
  166.  
  167.    assert(numattr < MAX_ATTR);
  168.  
  169.    error = apple_cgl.choose_pixel_format(attr, pfobj, &vsref);
  170.  
  171.    if ((error == kCGLBadAttribute || vsref == 0) && use_core_profile) {
  172.       apple_glx_diagnostic
  173.          ("Trying again without CoreProfile: error=%s, vsref=%d\n", apple_cgl.error_string(error), vsref);
  174.  
  175.       if (!error)
  176.          apple_cgl.destroy_pixel_format(*pfobj);
  177.  
  178.       numattr -= 3;
  179.       attr[numattr++] = 0;
  180.  
  181.       error = apple_cgl.choose_pixel_format(attr, pfobj, &vsref);
  182.    }
  183.  
  184.    if (error) {
  185.       snprintf(__crashreporter_info_buff__, sizeof(__crashreporter_info_buff__),
  186.                "CGLChoosePixelFormat error: %s\n", apple_cgl.error_string(error));
  187.       fprintf(stderr, "%s", __crashreporter_info_buff__);
  188.       abort();
  189.    }
  190.  
  191.    if (!*pfobj) {
  192.       snprintf(__crashreporter_info_buff__, sizeof(__crashreporter_info_buff__),
  193.                "No matching pixelformats found, perhaps try using LIBGL_ALLOW_SOFTWARE\n");
  194.       fprintf(stderr, "%s", __crashreporter_info_buff__);
  195.       abort();
  196.    }
  197. }
  198.