Separated GL context code.

2026-02-18 04:53:06 +01:00 · 2013-01-13 18:39:25 -08:00
parent 174524dde4
commit b77df356c1
15 changed files with 912 additions and 643 deletions
--- a/src/glcontext_wgl.cpp
+++ b/src/glcontext_wgl.cpp
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2011-2013 Branimir Karadzic. All rights reserved.
+ * License: http://www.opensource.org/licenses/BSD-2-Clause
+ */
+
+#include "bgfx_p.h"
+
+#if (BGFX_CONFIG_RENDERER_OPENGLES2|BGFX_CONFIG_RENDERER_OPENGLES3|BGFX_CONFIG_RENDERER_OPENGL)
+#	include "renderer_gl.h"
+
+#	if BGFX_USE_WGL
+
+namespace bgfx
+{
+	PFNWGLGETPROCADDRESSPROC wglGetProcAddress;
+	PFNWGLMAKECURRENTPROC wglMakeCurrent;
+	PFNWGLCREATECONTEXTPROC wglCreateContext;
+	PFNWGLDELETECONTEXTPROC wglDeleteContext;
+
+#	define GL_IMPORT(_optional, _proto, _func) _proto _func
+#		include "glimports.h"
+#	undef GL_IMPORT
+
+	void GlContext::create(uint32_t _width, uint32_t _height)
+	{
+		m_opengl32dll = LoadLibrary("opengl32.dll");
+		BGFX_FATAL(NULL != m_opengl32dll, Fatal::UnableToInitialize, "Failed to load opengl32.dll.");
+
+		wglGetProcAddress = (PFNWGLGETPROCADDRESSPROC)GetProcAddress(m_opengl32dll, "wglGetProcAddress");
+		BGFX_FATAL(NULL != wglGetProcAddress, Fatal::UnableToInitialize, "Failed get wglGetProcAddress.");
+
+		wglMakeCurrent = (PFNWGLMAKECURRENTPROC)GetProcAddress(m_opengl32dll, "wglMakeCurrent");
+		BGFX_FATAL(NULL != wglMakeCurrent, Fatal::UnableToInitialize, "Failed get wglMakeCurrent.");
+
+		wglCreateContext = (PFNWGLCREATECONTEXTPROC)GetProcAddress(m_opengl32dll, "wglCreateContext");
+		BGFX_FATAL(NULL != wglCreateContext, Fatal::UnableToInitialize, "Failed get wglCreateContext.");
+
+		wglDeleteContext = (PFNWGLDELETECONTEXTPROC)GetProcAddress(m_opengl32dll, "wglDeleteContext");
+		BGFX_FATAL(NULL != wglDeleteContext, Fatal::UnableToInitialize, "Failed get wglDeleteContext.");
+
+		m_hdc = GetDC(g_bgfxHwnd);
+		BGFX_FATAL(NULL != m_hdc, Fatal::UnableToInitialize, "GetDC failed!");
+
+		PIXELFORMATDESCRIPTOR pfd;
+		memset(&pfd, 0, sizeof(pfd) );
+		pfd.nSize = sizeof(PIXELFORMATDESCRIPTOR);
+		pfd.nVersion = 1;
+		pfd.iPixelType = PFD_TYPE_RGBA;
+		pfd.cColorBits = 32;
+		pfd.cAlphaBits = 8;
+		pfd.cDepthBits = 24;
+		pfd.cStencilBits = 8;
+		pfd.iLayerType = PFD_MAIN_PLANE;
+
+		int pixelFormat = ChoosePixelFormat(m_hdc, &pfd);
+		BGFX_FATAL(0 != pixelFormat, Fatal::UnableToInitialize, "ChoosePixelFormat failed!");
+
+		DescribePixelFormat(m_hdc, pixelFormat, sizeof(PIXELFORMATDESCRIPTOR), &pfd);
+
+		BX_TRACE("Pixel format:\n"
+			"\tiPixelType %d\n"
+			"\tcColorBits %d\n"
+			"\tcAlphaBits %d\n"
+			"\tcDepthBits %d\n"
+			"\tcStencilBits %d\n"
+			, pfd.iPixelType
+			, pfd.cColorBits
+			, pfd.cAlphaBits
+			, pfd.cDepthBits
+			, pfd.cStencilBits
+			);
+
+		int result;
+		result = SetPixelFormat(m_hdc, pixelFormat, &pfd);
+		BGFX_FATAL(0 != result, Fatal::UnableToInitialize, "SetPixelFormat failed!");
+
+		m_context = wglCreateContext(m_hdc);
+		BGFX_FATAL(NULL != m_context, Fatal::UnableToInitialize, "wglCreateContext failed!");
+
+		result = wglMakeCurrent(m_hdc, m_context);
+		BGFX_FATAL(0 != result, Fatal::UnableToInitialize, "wglMakeCurrent failed!");
+
+		import();
+	}
+
+	void GlContext::destroy()
+	{
+		wglMakeCurrent(NULL, NULL);
+
+		wglDeleteContext(m_context);
+		m_context = NULL;
+
+		ReleaseDC(g_bgfxHwnd, m_hdc);
+		m_hdc = NULL;
+
+		FreeLibrary(m_opengl32dll);
+		m_opengl32dll = NULL;
+	}
+
+	void GlContext::resize(uint32_t _width, uint32_t _height)
+	{
+	}
+
+	void GlContext::swap()
+	{
+		wglMakeCurrent(m_hdc, m_context);
+		SwapBuffers(m_hdc);
+	}
+
+	void GlContext::import()
+	{
+#	define GL_IMPORT(_optional, _proto, _func) \
+		{ \
+			_func = (_proto)wglGetProcAddress(#_func); \
+			if (_func == NULL) \
+			{ \
+				_func = (_proto)GetProcAddress(m_opengl32dll, #_func); \
+			} \
+			BGFX_FATAL(_optional || NULL != _func, Fatal::UnableToInitialize, "Failed to create OpenGL context. wglGetProcAddress(\"%s\")", #_func); \
+		}
+#	include "glimports.h"
+#	undef GL_IMPORT
+	}
+
+} // namespace bgfx
+
+#	endif // BGFX_USE_WGL
+#endif // (BGFX_CONFIG_RENDERER_OPENGLES2|BGFX_CONFIG_RENDERER_OPENGLES3|BGFX_CONFIG_RENDERER_OPENGL)