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         priv = new Private;
  23
  24         vector<unsigned> attribs;
  25
  26         attribs.push_back(CPF_DEPTH_SIZE);
  27         attribs.push_back(1);
  28
  29         if(opts.alpha)
  30         {
  31                 attribs.push_back(CPF_ALPHA_SIZE);
  32                 attribs.push_back(1);
  33         }
  34
  35         if(opts.stencil)
  36         {
  37                 attribs.push_back(CPF_STENCIL_SIZE);
  38                 attribs.push_back(1);
  39         }
  40
  41         if(opts.doublebuffer)
  42                 attribs.push_back(CPF_DOUBLEBUFFER);
  43
  44         if(opts.multisample>0)
  45         {
  46                 attribs.push_back(CPF_SAMPLE_BUFFERS);
  47                 attribs.push_back(1);
  48                 attribs.push_back(CPF_SAMPLES);
  49                 attribs.push_back(opts.multisample);
  50         }
  51
  52         attribs.push_back(0);
  53
  54         CocoaPixelFormat *pixfmt = choose_pixel_format(&attribs.front());
  55         if(!pixfmt)
  56                 throw unsupported_gl_mode(opts);
  57
  58         priv->context = create_gl_context(pixfmt);
  59         destroy_pixel_format(pixfmt);
  60
  61         attach_gl_context_to_window(priv->context, window.get_private().window);
  62         make_gl_context_current(priv->context);
  63 }
  64
  65 GLContext::~GLContext()
  66 {
  67         destroy_gl_context(priv->context);
  68         delete priv;
  69 }
  70
  71 void GLContext::swap_buffers()
  72 {
  73         flush_gl_buffer(priv->context);
  74 }
  75
  76 void GLContext::window_resized(unsigned w, unsigned h)
  77 {
  78         // XXX Call [context update] here?
  79         glViewport(0, 0, w, h);
  80 }
  81
  82 } // namespace Graphics
  83 } // namespace Msp