apple_visual.c revision 0594cf70883b64692ba617d85f4f9b4e636e5c2b
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#include <OpenGL/OpenGL.h> 36#include <OpenGL/CGLContext.h> 37#include <OpenGL/CGLRenderers.h> 38#include "apple_cgl.h" 39#include "apple_visual.h" 40#include "apple_glx.h" 41#include "glcontextmodes.h" 42 43enum 44{ 45 MAX_ATTR = 60 46}; 47 48/*mode is a __GlcontextModes*/ 49void 50apple_visual_create_pfobj(CGLPixelFormatObj * pfobj, const void *mode, 51 bool * double_buffered, bool * uses_stereo, 52 bool offscreen) 53{ 54 CGLPixelFormatAttribute attr[MAX_ATTR]; 55 const __GLcontextModes *c = mode; 56 int numattr = 0; 57 GLint vsref = 0; 58 CGLError error = 0; 59 60 if (offscreen) { 61 apple_glx_diagnostic 62 ("offscreen rendering enabled. Using kCGLPFAOffScreen\n"); 63 64 attr[numattr++] = kCGLPFAOffScreen; 65 attr[numattr++] = kCGLPFAColorSize; 66 attr[numattr++] = 32; 67 } 68 else if (getenv("LIBGL_ALWAYS_SOFTWARE") != NULL) { 69 apple_glx_diagnostic 70 ("Software rendering requested. Using kCGLRendererGenericFloatID.\n"); 71 attr[numattr++] = kCGLPFARendererID; 72 attr[numattr++] = kCGLRendererGenericFloatID; 73 } 74 else if (getenv("LIBGL_ALLOW_SOFTWARE") != NULL) { 75 apple_glx_diagnostic 76 ("Software rendering is not being excluded. Not using kCGLPFAAccelerated.\n"); 77 } 78 else { 79 attr[numattr++] = kCGLPFAAccelerated; 80 } 81 82 /* 83 * The program chose a config based on the fbconfigs or visuals. 84 * Those are based on the attributes from CGL, so we probably 85 * do want the closest match for the color, depth, and accum. 86 */ 87 attr[numattr++] = kCGLPFAClosestPolicy; 88 89 if (c->stereoMode) { 90 attr[numattr++] = kCGLPFAStereo; 91 *uses_stereo = true; 92 } 93 else { 94 *uses_stereo = false; 95 } 96 97 if (c->doubleBufferMode) { 98 attr[numattr++] = kCGLPFADoubleBuffer; 99 *double_buffered = true; 100 } 101 else { 102 *double_buffered = false; 103 } 104 105 attr[numattr++] = kCGLPFAColorSize; 106 attr[numattr++] = c->redBits + c->greenBits + c->blueBits; 107 attr[numattr++] = kCGLPFAAlphaSize; 108 attr[numattr++] = c->alphaBits; 109 110 if ((c->accumRedBits + c->accumGreenBits + c->accumBlueBits) > 0) { 111 attr[numattr++] = kCGLPFAAccumSize; 112 attr[numattr++] = c->accumRedBits + c->accumGreenBits + 113 c->accumBlueBits + c->accumAlphaBits; 114 } 115 116 if (c->depthBits > 0) { 117 attr[numattr++] = kCGLPFADepthSize; 118 attr[numattr++] = c->depthBits; 119 } 120 121 if (c->stencilBits > 0) { 122 attr[numattr++] = kCGLPFAStencilSize; 123 attr[numattr++] = c->stencilBits; 124 } 125 126 if (c->sampleBuffers > 0) { 127 attr[numattr++] = kCGLPFAMultisample; 128 attr[numattr++] = kCGLPFASampleBuffers; 129 attr[numattr++] = c->sampleBuffers; 130 attr[numattr++] = kCGLPFASamples; 131 attr[numattr++] = c->samples; 132 } 133 134 attr[numattr++] = 0; 135 136 assert(numattr < MAX_ATTR); 137 138 error = apple_cgl.choose_pixel_format(attr, pfobj, &vsref); 139 140 if (error) { 141 fprintf(stderr, "error: %s\n", apple_cgl.error_string(error)); 142 abort(); 143 } 144} 145