daily upsate on 20230517 by nitload youmu

源代码/StgSharpGraphics/StgSharpGraphics.c

@@ -8,6 +8,26 @@
 #include "stdio.h"
 #include "internal.h"
 
+extern float* triangleVertexes;
+
+
+const char *vertexShaderSource =
+"#version 460 core\n"
+"layout (location = 0) in vec3 aPos\n"
+"void main()\n"
+"(\n"
+"gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
+")\n";
+
+const char* fragmentShaderSource =
+"#version 460 core\n"
+"out vec4 FragColor\n"
+"void main()\n"
+"{\n"
+"FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
+"}\n"
+;
+
 int version[4] = { 0,0,0,0 };
 STGSHARPGRAPHICS_API int* versionInfo = &version;
 
@@ -27,6 +47,63 @@ STGSHARPGRAPHICS_API IOpackage initPackage(void)
 
 STGSHARPGRAPHICS_API int initWindow(int width, int height)
 {
+
+    //编译顶点着色器
+
+    unsigned int vertexShader;
+    vertexShader = glCreateShader(GL_VERTEX_SHADER);
+    glShaderSource(vertexShader,1,&vertexShaderSource,NULL);
+    glCompileShader(vertexShader);
+    int  success;
+    char infoLog[512];
+    glGetShaderiv(vertexShader, GL_COMPILE_STATUS, &success);
+    if (!success)
+    {
+        glGetShaderInfoLog(vertexShader, 512, NULL, infoLog);
+        printf("\i",infoLog);
+    }
+
+    //编译片段着色器
+
+    unsigned int fragmentShader;
+    fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
+    glShaderSource(fragmentShader, 1, &fragmentShaderSource, NULL);
+    glCompileShader(fragmentShader);
+
+    //创建着色器程序
+
+    unsigned int shaderProgram;
+    shaderProgram = glCreateProgram();
+    glAttachShader(shaderProgram, vertexShader);
+    glAttachShader(shaderProgram, fragmentShader);
+    glUseProgram(shaderProgram);
+    glDeleteShader(vertexShader);
+    glDeleteShader(fragmentShader);
+
+    // 链接顶点属性
+
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
+    glEnableVertexAttribArray(0);
+
+
+    //创建顶点缓存实例
+
+    unsigned int VBO;
+    glGenBuffers(1, &VBO);
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 3 * 3, triangleVertices, GL_STATIC_DRAW);
+
+    //创建顶点数组实例
+
+    unsigned int VAO;
+    glGenVertexArrays(1, &VAO);
+    glBindVertexArray(VAO);
+    // 2. 把顶点数组复制到缓冲中供OpenGL使用
+    glBindBuffer(GL_ARRAY_BUFFER, VBO);
+    glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 3 * 3, triangleVertices, GL_STATIC_DRAW);
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
+    glEnableVertexAttribArray(0);
+
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
@@ -61,6 +138,13 @@ STGSHARPGRAPHICS_API int initWindow(int width, int height)
       glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
       glClear(GL_COLOR_BUFFER_BIT);
 
+      // draw our first triangle
+      glUseProgram(shaderProgram);
+      glBindVertexArray(VAO); // seeing as we only have a single VAO there's no need to bind it every time, but we'll do so to keep things a bit more organized
+      //glDrawArrays(GL_TRIANGLES, 0, 6);
+      glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
+      // glBindVertexArray(0); // no need to unbind it every time 
+
       // glfw: swap buffers and poll IO events (keys pressed/released, mouse moved etc.)
       // -------------------------------------------------------------------------------
       glfwSwapBuffers(window);
@@ -71,6 +155,11 @@ STGSHARPGRAPHICS_API int initWindow(int width, int height)
    // ------------------------------------------------------------------
    glfwTerminate();
 
+   //glDeleteVertexArrays(1, &VAO);
+   glDeleteBuffers(1, &VBO);
+   //glDeleteBuffers(1, &EBO);
+   glDeleteProgram(shaderProgram);
+
    return 0;
 }