source/graphics/cgl/glcontext.cpp

   1 #include <vector>
   2 #include <OpenGL/gl.h>
   3 #include "cocoaglcontext.h"
   4 #include "cocoapixelformat.h"
   5 #include "glcontext.h"
   6 #include "window_private.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace Graphics {
  12
  13 typedef CocoaGLContext *ContextHandle;
  14
  15 struct GLContext::Private
  16 {
  17         ContextHandle context;
  18 };
  19
  20 void GLContext::platform_init(const GLOptions &opts)
  21 {
  22         vector<unsigned> attribs;
  23
  24         attribs.push_back(CPF_DEPTH_SIZE);
  25         attribs.push_back(1);
  26
  27         if(opts.alpha)
  28         {
  29                 attribs.push_back(CPF_ALPHA_SIZE);
  30                 attribs.push_back(1);
  31         }
  32
  33         if(opts.stencil)
  34         {
  35                 attribs.push_back(CPF_STENCIL_SIZE);
  36                 attribs.push_back(1);
  37         }
  38
  39         if(opts.doublebuffer)
  40                 attribs.push_back(CPF_DOUBLEBUFFER);
  41
  42         if(opts.multisample>0)
  43         {
  44                 attribs.push_back(CPF_SAMPLE_BUFFERS);
  45                 attribs.push_back(1);
  46                 attribs.push_back(CPF_SAMPLES);
  47                 attribs.push_back(opts.multisample);
  48         }
  49
  50         attribs.push_back(0);
  51
  52         CocoaPixelFormat *pixfmt = choose_pixel_format(&attribs.front());
  53         if(!pixfmt)
  54                 throw unsupported_gl_mode(opts);
  55
  56         priv = new Private;
  57         priv->context = create_gl_context(pixfmt);
  58         destroy_pixel_format(pixfmt);
  59
  60         attach_gl_context_to_window(priv->context, window.get_private().window);
  61         make_gl_context_current(priv->context);
  62 }
  63
  64 GLContext::~GLContext()
  65 {
  66         destroy_gl_context(priv->context);
  67         delete priv;
  68 }
  69
  70 void GLContext::swap_buffers()
  71 {
  72         flush_gl_buffer(priv->context);
  73 }
  74
  75 void GLContext::window_resized(unsigned w, unsigned h)
  76 {
  77         // XXX Call [context update] here?
  78         glViewport(0, 0, w, h);
  79 }
  80
  81 } // namespace Graphics
  82 } // namespace Msp