Set dp branch as trunk

2026-07-19 15:49:19 +02:00 · 2015-04-03 13:34:06 +00:00
commit 45f4c0d98a
132 changed files with 94789 additions and 0 deletions
--- a/opengl/ARB_Multisample.cpp
+++ b/opengl/ARB_Multisample.cpp
@@ -0,0 +1,124 @@
+/*========================================================================================
+
+  Name:   ARB_multisample.cpp
+	Author: Colt "MainRoach" McAnlis
+	Date:   4/29/04
+	Desc:   This file contains the context to load a WGL extension from a string
+		    As well as collect the sample format available based upon the graphics card.
+
+========================================================================================*/
+
+#include <windows.h>
+#include <gl/gl.h>
+#include <gl/glu.h>
+#include "wglext.h"		//WGL extensions
+#include "glext.h"		//GL extensions
+
+
+#include "arb_multisample.h"
+
+// Declairations We'll Use
+#define WGL_SAMPLE_BUFFERS_ARB		 0x2041
+#define WGL_SAMPLES_ARB			     0x2042
+
+bool	arbMultisampleSupported	= false;
+int		arbMultisampleFormat	= 0;
+
+// WGLisExtensionSupported: This Is A Form Of The Extension For WGL
+bool WGLisExtensionSupported(const char *extension)
+{
+	const size_t extlen = strlen(extension);
+	const char *supported = NULL;
+
+	// Try To Use wglGetExtensionStringARB On Current DC, If Possible
+	PROC wglGetExtString = wglGetProcAddress("wglGetExtensionsStringARB");
+
+	if (wglGetExtString)
+		supported = ((char*(__stdcall*)(HDC))wglGetExtString)(wglGetCurrentDC());
+
+	// If That Failed, Try Standard Opengl Extensions String
+	if (supported == NULL)
+		supported = (char*)glGetString(GL_EXTENSIONS);
+
+	// If That Failed Too, Must Be No Extensions Supported
+	if (supported == NULL)
+		return false;
+
+	// Begin Examination At Start Of String, Increment By 1 On False Match
+	for (const char* p = supported; ; p++)
+	{
+		// Advance p Up To The Next Possible Match
+		p = strstr(p, extension);
+
+		if (p == NULL)
+			return false;															// No Match
+
+		// Make Sure That Match Is At The Start Of The String Or That
+		// The Previous Char Is A Space, Or Else We Could Accidentally
+		// Match "wglFunkywglExtension" With "wglExtension"
+
+		// Also, Make Sure That The Following Character Is Space Or NULL
+		// Or Else "wglExtensionTwo" Might Match "wglExtension"
+		if ((p==supported || p[-1]==' ') && (p[extlen]=='\0' || p[extlen]==' '))
+			return true;															// Match
+	}
+}
+
+int InitMultisample(HINSTANCE hInstance,HWND hWnd,PIXELFORMATDESCRIPTOR pfd,int mode)
+{//used to query the multisample frequencies
+ arbMultisampleSupported=false;
+ //see if the string exists in WGL!
+ if (!WGLisExtensionSupported("WGL_ARB_multisample"))
+  return 0;
+ //get our pixel format
+ PFNWGLCHOOSEPIXELFORMATARBPROC wglChoosePixelFormatARB=(PFNWGLCHOOSEPIXELFORMATARBPROC)wglGetProcAddress("wglChoosePixelFormatARB");
+ if (!wglChoosePixelFormatARB)
+  return 0;
+ //get our current device context
+ HDC hDC=GetDC(hWnd);
+ int pixelFormat;
+ int valid;
+ UINT numFormats;
+ float fAttributes[]={0,0};
+ // These attributes are the bits we want to test for in our sample
+ // everything is pretty standard, the only one we want to
+ // really focus on is the SAMPLE BUFFERS ARB and WGL SAMPLES
+ // these two are going to do the main testing for whether or not
+ // we support multisampling on this hardware.
+ int iAttributes[]=
+ {
+  WGL_DRAW_TO_WINDOW_ARB,GL_TRUE,
+  WGL_SUPPORT_OPENGL_ARB,GL_TRUE,
+  WGL_ACCELERATION_ARB,WGL_FULL_ACCELERATION_ARB,
+  WGL_COLOR_BITS_ARB,24,
+  WGL_ALPHA_BITS_ARB,8,
+  WGL_DEPTH_BITS_ARB,16,
+  WGL_STENCIL_BITS_ARB,0,
+  WGL_DOUBLE_BUFFER_ARB,GL_TRUE,
+  WGL_SAMPLE_BUFFERS_ARB,GL_TRUE,
+  WGL_SAMPLES_ARB,mode,
+  0,0
+ };
+/*
+ //first we check to see if we can get a pixel format for 4 samples
+ valid=wglChoosePixelFormatARB(hDC,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
+ if (valid&&(numFormats>=1))
+ {//if we returned true, and our format count is greater than 1
+  arbMultisampleSupported=true;
+  arbMultisampleFormat=pixelFormat;
+  return arbMultisampleSupported;
+ }
+*/
+ while (iAttributes[19]>1)
+ {//our pixel format with (mode) samples failed, test for less samples
+  valid=wglChoosePixelFormatARB(hDC,iAttributes,fAttributes,1,&pixelFormat,&numFormats);
+  if (valid&&(numFormats>=1))
+  {//if we returned true, and our format count is greater than 1
+   arbMultisampleSupported=true;
+   arbMultisampleFormat=pixelFormat;
+   return iAttributes[19]; //return number of samples
+  }
+  iAttributes[19]>>=1;
+ }
+ return 0;
+}