120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2014 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include <xenia/gpu/gl4/gl_context.h>
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#include <poly/logging.h>
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namespace xe {
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namespace gpu {
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namespace gl4 {
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thread_local GLEWContext* tls_glew_context_ = nullptr;
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thread_local WGLEWContext* tls_wglew_context_ = nullptr;
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extern "C" GLEWContext* glewGetContext() { return tls_glew_context_; }
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extern "C" WGLEWContext* wglewGetContext() { return tls_wglew_context_; }
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GLContext::GLContext() : dc_(nullptr), glrc_(nullptr) {}
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GLContext::~GLContext() {
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wglMakeCurrent(nullptr, nullptr);
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if (glrc_) {
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wglDeleteContext(glrc_);
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}
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}
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bool GLContext::Initialize(HDC dc) {
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dc_ = dc;
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PIXELFORMATDESCRIPTOR pfd = {0};
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pfd.nSize = sizeof(pfd);
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pfd.nVersion = 1;
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pfd.dwFlags = PFD_DOUBLEBUFFER | PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW;
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pfd.iPixelType = PFD_TYPE_RGBA;
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pfd.cColorBits = 32;
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pfd.cDepthBits = 32;
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pfd.iLayerType = PFD_MAIN_PLANE;
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int pixel_format = ChoosePixelFormat(dc_, &pfd);
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if (!pixel_format) {
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PLOGE("Unable to choose pixel format");
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return false;
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}
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if (!SetPixelFormat(dc_, pixel_format, &pfd)) {
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PLOGE("Unable to set pixel format");
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return false;
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}
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HGLRC temp_context = wglCreateContext(dc_);
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if (!temp_context) {
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PLOGE("Unable to create temporary GL context");
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return false;
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}
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wglMakeCurrent(dc_, temp_context);
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tls_glew_context_ = &glew_context_;
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tls_wglew_context_ = &wglew_context_;
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if (glewInit() != GLEW_OK) {
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PLOGE("Unable to initialize GLEW");
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return false;
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}
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if (wglewInit() != GLEW_OK) {
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PLOGE("Unable to initialize WGLEW");
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return false;
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}
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if (!WGLEW_ARB_create_context) {
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PLOGE("WGL_ARG_create_context not supported by GL ICD");
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return false;
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}
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int context_flags = WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
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#if DEBUG
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context_flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
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#endif // DEBUG
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int attrib_list[] = {WGL_CONTEXT_MAJOR_VERSION_ARB, 4, //
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WGL_CONTEXT_MINOR_VERSION_ARB, 5, //
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WGL_CONTEXT_FLAGS_ARB, context_flags, //
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0};
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glrc_ = wglCreateContextAttribsARB(dc_, nullptr, attrib_list);
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wglMakeCurrent(nullptr, nullptr);
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wglDeleteContext(temp_context);
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if (!glrc_) {
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PLOGE("Unable to create real GL context");
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return false;
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}
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if (!MakeCurrent()) {
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PLOGE("Could not make real GL context current");
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return false;
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}
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return true;
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}
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bool GLContext::MakeCurrent() {
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if (!wglMakeCurrent(dc_, glrc_)) {
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return false;
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}
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tls_glew_context_ = &glew_context_;
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tls_wglew_context_ = &wglew_context_;
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return true;
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}
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void GLContext::ClearCurrent() {
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wglMakeCurrent(nullptr, nullptr);
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tls_glew_context_ = nullptr;
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tls_wglew_context_ = nullptr;
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}
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} // namespace gl4
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} // namespace gpu
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} // namespace xe
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