创建 编译 连接 shader

main.cpp

@@ -1,7 +1,9 @@
 #include <windows.h>
+#include "glew.h"
 #include <gl/GL.h>
 #include <stdio.h>
 #pragma comment(lib,"opengl32.lib")
+#pragma comment(lib, "glew32.lib")
 
 /**
 * @hwnd 发起消息的窗口
@@ -17,6 +19,59 @@ LRESULT CALLBACK GLWindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 	return DefWindowProc(hwnd, msg, wParam, lParam);//其他消息调用window默认处理函数
 }
 
+char* LoadFileContent(const char *path) {
+	char* fileContent = nullptr;
+	int filesize = 0;
+	FILE*pFile = fopen(path, "rb");
+	if (pFile) {
+		fseek(pFile, 0, SEEK_END);
+		int nLen = ftell(pFile);
+		if (nLen > 0) {
+			rewind(pFile);
+			fileContent = new char[nLen + 1];
+			fread(fileContent, sizeof(char), nLen, pFile);
+			fileContent[nLen] = '\0';
+			filesize = nLen;
+		}
+		fclose(pFile);
+	}
+	return fileContent;
+}
+
+GLuint CreateGPUProgram(const char* vsShaderPath, const char* fsShaderPath) {
+	//创建program
+	GLuint program = glCreateProgram();
+
+	//创建shader
+	GLuint vsShader = glCreateShader(GL_VERTEX_SHADER);
+	GLuint fsShader = glCreateShader(GL_FRAGMENT_SHADER);
+	//读取shader代码
+	const char* vsCode = LoadFileContent(vsShaderPath);
+	const char* fsCode = LoadFileContent(fsShaderPath);
+	//把shader代码 从内存传到显存
+	glShaderSource(vsShader, 1, &vsCode, nullptr);
+	glShaderSource(fsShader, 1, &fsCode, nullptr);
+	//编译shader
+	glCompileShader(vsShader);
+	glCompileShader(fsShader);
+	
+	//绑定shader
+	glAttachShader(program, vsShader);
+	glAttachShader(program, fsShader);
+
+	//连接
+	glLinkProgram(program);
+
+	//解绑shader
+	glDetachShader(program, vsShader);
+	glDetachShader(program, fsShader);
+
+	//删除shader
+	glDeleteShader(vsShader);
+	glDeleteShader(fsShader);
+
+	return program;
+}
 /**
 * @hinstance 本应用程序启动实例
 * @hPrevInstance 上一次应用程式的实例
@@ -78,6 +133,11 @@ INT WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	HGLRC rc = wglCreateContext(dc);
 	wglMakeCurrent(dc, rc);//设置OpenGL渲染环境生效
 
+	/*glew初始化*/
+	glewInit();
+
+	GLuint program = CreateGPUProgram("test.vs", "test.fs");
+
 	glClearColor(1.0f, 1.0f, 0.0f, 1.0f);
 
 	/*显示窗口*/

test.fs

@@ -2,4 +2,4 @@ varying vec3 V_Color;
 
 void main() {
 	gl_FragColor = V_Color;
-}
+}