Red GL4.5 screen.

src/xenia/gpu/gl4/gl_context.cc

@@ -0,0 +1,119 @@
+/**
+******************************************************************************
+* Xenia : Xbox 360 Emulator Research Project                                 *
+******************************************************************************
+* Copyright 2014 Ben Vanik. All rights reserved.                             *
+* Released under the BSD license - see LICENSE in the root for more details. *
+******************************************************************************
+*/
+
+#include <xenia/gpu/gl4/gl_context.h>
+
+#include <poly/logging.h>
+
+namespace xe {
+namespace gpu {
+namespace gl4 {
+
+thread_local GLEWContext* tls_glew_context_ = nullptr;
+thread_local WGLEWContext* tls_wglew_context_ = nullptr;
+extern "C" GLEWContext* glewGetContext() { return tls_glew_context_; }
+extern "C" WGLEWContext* wglewGetContext() { return tls_wglew_context_; }
+
+GLContext::GLContext() : dc_(nullptr), glrc_(nullptr) {}
+
+GLContext::~GLContext() {
+  wglMakeCurrent(nullptr, nullptr);
+  if (glrc_) {
+    wglDeleteContext(glrc_);
+  }
+}
+
+bool GLContext::Initialize(HDC dc) {
+  dc_ = dc;
+
+  PIXELFORMATDESCRIPTOR pfd = {0};
+  pfd.nSize = sizeof(pfd);
+  pfd.nVersion = 1;
+  pfd.dwFlags = PFD_DOUBLEBUFFER | PFD_SUPPORT_OPENGL | PFD_DRAW_TO_WINDOW;
+  pfd.iPixelType = PFD_TYPE_RGBA;
+  pfd.cColorBits = 32;
+  pfd.cDepthBits = 32;
+  pfd.iLayerType = PFD_MAIN_PLANE;
+  int pixel_format = ChoosePixelFormat(dc_, &pfd);
+  if (!pixel_format) {
+    PLOGE("Unable to choose pixel format");
+    return false;
+  }
+  if (!SetPixelFormat(dc_, pixel_format, &pfd)) {
+    PLOGE("Unable to set pixel format");
+    return false;
+  }
+
+  HGLRC temp_context = wglCreateContext(dc_);
+  if (!temp_context) {
+    PLOGE("Unable to create temporary GL context");
+    return false;
+  }
+  wglMakeCurrent(dc_, temp_context);
+
+  tls_glew_context_ = &glew_context_;
+  tls_wglew_context_ = &wglew_context_;
+  if (glewInit() != GLEW_OK) {
+    PLOGE("Unable to initialize GLEW");
+    return false;
+  }
+  if (wglewInit() != GLEW_OK) {
+    PLOGE("Unable to initialize WGLEW");
+    return false;
+  }
+
+  if (!WGLEW_ARB_create_context) {
+    PLOGE("WGL_ARG_create_context not supported by GL ICD");
+    return false;
+  }
+
+  int context_flags = WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
+#if DEBUG
+  context_flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
+#endif  // DEBUG
+
+  int attrib_list[] = {WGL_CONTEXT_MAJOR_VERSION_ARB, 4,      //
+                       WGL_CONTEXT_MINOR_VERSION_ARB, 5,      //
+                       WGL_CONTEXT_FLAGS_ARB, context_flags,  //
+                       0};
+
+  glrc_ = wglCreateContextAttribsARB(dc_, nullptr, attrib_list);
+  wglMakeCurrent(nullptr, nullptr);
+  wglDeleteContext(temp_context);
+  if (!glrc_) {
+    PLOGE("Unable to create real GL context");
+    return false;
+  }
+
+  if (!MakeCurrent()) {
+    PLOGE("Could not make real GL context current");
+    return false;
+  }
+
+  return true;
+}
+
+bool GLContext::MakeCurrent() {
+  if (!wglMakeCurrent(dc_, glrc_)) {
+    return false;
+  }
+  tls_glew_context_ = &glew_context_;
+  tls_wglew_context_ = &wglew_context_;
+  return true;
+}
+
+void GLContext::ClearCurrent() {
+  wglMakeCurrent(nullptr, nullptr);
+  tls_glew_context_ = nullptr;
+  tls_wglew_context_ = nullptr;
+}
+
+}  // namespace gl4
+}  // namespace gpu
+}  // namespace xe