port from perforce

2026-04-18 22:31:51 +02:00
commit 8d0ab5b7cc
8409 changed files with 3972376 additions and 0 deletions
--- a/bp4k/src/flightsim/Shaders.cpp
+++ b/bp4k/src/flightsim/Shaders.cpp
@@ -0,0 +1,164 @@
+#include "stdafx.h"
+#include "Shaders.h"
+
+
+PFNGLCREATESHADERPROC glCreateShader = NULL;
+PFNGLSHADERSOURCEPROC glShaderSource = NULL;
+PFNGLCOMPILESHADERPROC glCompileShader = NULL;
+PFNGLGETSHADERIVPROC glGetShaderiv = NULL;
+PFNGLGETPROGRAMIVPROC glGetProgramiv = NULL;
+PFNGLCREATEPROGRAMPROC glCreateProgram = NULL;
+PFNGLATTACHSHADERPROC glAttachShader = NULL;
+PFNGLLINKPROGRAMPROC glLinkProgram = NULL;
+PFNGLUSEPROGRAMPROC glUseProgram = NULL;
+PFNGLGETSHADERINFOLOGPROC glGetShaderInfoLog = NULL;
+PFNGLGETPROGRAMINFOLOGPROC glGetProgramInfoLog = NULL;
+
+
+void useProgram(GLhandleARB ah_Program)
+{
+	glUseProgram(ah_Program);
+}
+
+
+void initShaders()
+{
+	glCreateShader = (PFNGLCREATESHADERPROC)myGetProcAddress("glCreateShader");
+	glShaderSource = (PFNGLSHADERSOURCEPROC)myGetProcAddress("glShaderSource");
+	glCompileShader = (PFNGLCOMPILESHADERPROC)myGetProcAddress("glCompileShader");
+	glGetShaderiv =	(PFNGLGETSHADERIVPROC)myGetProcAddress("glGetShaderiv");
+	glGetProgramiv = (PFNGLGETPROGRAMIVPROC)myGetProcAddress("glGetProgramiv");
+	glCreateProgram = (PFNGLCREATEPROGRAMPROC)myGetProcAddress("glCreateProgram");
+	glAttachShader = (PFNGLATTACHSHADERPROC)myGetProcAddress("glAttachShader");
+	glLinkProgram = (PFNGLLINKPROGRAMPROC)myGetProcAddress("glLinkProgram");
+	glUseProgram = (PFNGLUSEPROGRAMPROC)myGetProcAddress("glUseProgram");
+	glGetShaderInfoLog = (PFNGLGETSHADERINFOLOGPROC)myGetProcAddress("glGetShaderInfoLog");
+	glGetProgramInfoLog = (PFNGLGETPROGRAMINFOLOGPROC)myGetProcAddress("glGetProgramInfoLog");
+	
+	if (!(glCreateShader && glShaderSource && glCompileShader && glGetShaderiv && glGetProgramiv && glCreateProgram && glAttachShader && glLinkProgram && glUseProgram && glGetShaderInfoLog && glGetProgramInfoLog))
+	{
+		std::cerr <<  "Some shader functions are not available!" << std::endl;
+	}
+}
+
+
+GLhandleARB createVertexShader(const char* as_FileName)
+{
+	GLhandleARB lh_Shader = 0;
+	
+	char* ls_ShaderSource = textFileRead(as_FileName);
+
+	if (ls_ShaderSource == NULL)
+	{
+		std::cerr << "Error reading file: " << as_FileName << std::endl;
+		return lh_Shader;
+	}
+
+	lh_Shader = glCreateShader(GL_VERTEX_SHADER);
+
+	glShaderSource(lh_Shader, 1, (const char**)&ls_ShaderSource, NULL);
+	glCompileShader(lh_Shader);
+
+	free(ls_ShaderSource);
+
+	int li_Status = 0;
+	glGetShaderiv(lh_Shader, GL_COMPILE_STATUS, &li_Status);
+
+	if (li_Status == GL_FALSE)
+	{
+		std::cerr << "Error compiling vertex shader: " << as_FileName << std::endl;
+	}
+
+	return lh_Shader;
+}
+
+
+GLhandleARB createFragmentShader(const char* as_FileName)
+{
+	GLhandleARB lh_Shader = 0;
+
+	char* ls_ShaderSource = textFileRead(as_FileName);
+	if (ls_ShaderSource == NULL)
+	{
+		std::cerr << "Error reading file: " << as_FileName << std::endl;
+		return lh_Shader;
+	}
+
+	lh_Shader = glCreateShader(GL_FRAGMENT_SHADER);
+
+	glShaderSource(lh_Shader, 1, (const char**)&ls_ShaderSource, NULL);
+	glCompileShader(lh_Shader);
+
+	int li_Status = 0;
+
+	glGetShaderiv(lh_Shader, GL_COMPILE_STATUS, &li_Status);
+
+	if (li_Status == GL_FALSE)
+	{
+		std::cerr << "Error compiling fragment shader: " << as_FileName << std::endl;
+	}
+
+	free(ls_ShaderSource);
+
+	return lh_Shader;
+}
+
+
+GLhandleARB createProgram(GLhandleARB ah_VertexShader, GLhandleARB ah_FragmentShader)
+{
+	GLhandleARB lh_Program = 0;
+	
+	if (ah_VertexShader + ah_FragmentShader <= 1)
+	{
+		std::cerr << "Cannot create program." << std::endl;
+		return lh_Program;
+	}
+
+	lh_Program = glCreateProgram();
+
+	glAttachShader(lh_Program, ah_VertexShader);
+	glAttachShader(lh_Program, ah_FragmentShader);
+	glLinkProgram(lh_Program);
+
+	int li_Status = 0;
+
+	glGetProgramiv(lh_Program, GL_LINK_STATUS, &li_Status);
+
+	if (li_Status == GL_FALSE)
+	{
+		std::cerr << "Error linking shaders." << std::endl;
+	}
+
+	return lh_Program;
+}
+
+
+char* textFileRead(const char* as_FileName) 
+{
+	FILE* lh_File;
+	char* ls_Content = NULL;
+	size_t li_Count = 0;
+
+	if (as_FileName != NULL) 
+	{
+		fopen_s(&lh_File, as_FileName, "rt");
+
+		if (lh_File != NULL) 
+		{
+			fseek(lh_File, 0, SEEK_END);
+			li_Count = ftell(lh_File);
+			rewind(lh_File);
+
+			if (li_Count > 0) 
+			{
+				ls_Content = (char*) malloc(sizeof(char) * (li_Count + 1));
+				li_Count = fread(ls_Content, sizeof(char), li_Count, lh_File);
+				ls_Content[li_Count] = '\0';
+			}
+
+			fclose(lh_File);
+		}
+	}
+
+	return ls_Content;
+}