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95 lines
2.4 KiB
95 lines
2.4 KiB
//
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// NSGLWrapper.mm
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// XcodeOpenCL
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//
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// Created by Joshua Moerman on 13/04/14.
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//
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//
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#include "NSGLWrapper.hpp"
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#include <iostream>
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#include <stdexcept>
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#import <Cocoa/Cocoa.h>
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#import <OpenGL/OpenGL.h>
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static void check_cgl(CGLError e) {
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if(e != kCGLNoError){
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throw std::runtime_error(CGLErrorString(e));
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}
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}
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GLContext::GLContext() {
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GLint npix{};
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const CGLPixelFormatAttribute attributes[]{
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kCGLPFADoubleBuffer,
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kCGLPFADepthSize, static_cast<CGLPixelFormatAttribute>(24),
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kCGLPFAOpenGLProfile, static_cast<CGLPixelFormatAttribute>(kCGLOGLPVersion_3_2_Core),
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static_cast<CGLPixelFormatAttribute>(0)
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};
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check_cgl(CGLChoosePixelFormat(attributes, &pix, &npix));
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check_cgl(CGLCreateContext(pix, 0, &ctx));
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GLint swap_interval = 1;
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check_cgl(CGLSetParameter(ctx, kCGLCPSwapInterval, &swap_interval));
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set_as_current_context();
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}
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GLContext::~GLContext() {
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CGLReleaseContext(ctx);
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CGLReleasePixelFormat(pix);
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}
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void GLContext::set_as_current_context() const {
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check_cgl(CGLSetCurrentContext(ctx));
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}
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void GLContext::lock() {
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check_cgl(CGLLockContext(ctx));
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}
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void GLContext::unlock() {
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check_cgl(CGLUnlockContext(ctx));
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}
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static void check_cv(CVReturn r) {
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if(r != kCVReturnSuccess){
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throw std::runtime_error("Some CV display link issue");
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}
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}
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static CVReturn CVDisplayLinkyInvokeCallback(CVDisplayLinkRef displayLink, const CVTimeStamp* now, const CVTimeStamp* outputTime, CVOptionFlags flagsIn, CVOptionFlags* flagsOut, void* displayLinkContext) {
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if(!displayLinkContext){
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throw std::runtime_error("There is no context in the display link");
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}
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auto& foo = *(CVDisplayLinky*)displayLinkContext;
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if(foo.callback){
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foo.callback();
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}
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return kCVReturnSuccess;
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}
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CVDisplayLinky::CVDisplayLinky(GLContext const & c) {
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check_cv(CVDisplayLinkCreateWithActiveCGDisplays(&displayLink));
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check_cv(CVDisplayLinkSetOutputCallback(displayLink, &CVDisplayLinkyInvokeCallback, this));
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check_cv(CVDisplayLinkSetCurrentCGDisplayFromOpenGLContext(displayLink, c.ctx, c.pix));
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}
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CVDisplayLinky::~CVDisplayLinky() {
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stop();
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CVDisplayLinkRelease(displayLink);
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}
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void CVDisplayLinky::start() {
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check_cv(CVDisplayLinkStart(displayLink));
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}
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void CVDisplayLinky::stop() {
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check_cv(CVDisplayLinkStop(displayLink));
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}
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