Add a fixed function program

This commit is contained in:
Fries 2024-03-10 13:53:20 -07:00
parent ab928750cf
commit 86b72db39e
2 changed files with 62 additions and 1 deletions

60
src/fixedfunction.cc Normal file
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@ -0,0 +1,60 @@
#include <iostream>
#include <epoxy/gl.h>
#include <GLFW/glfw3.h>
void triangle() {
glClearColor(1.0f, 1.0f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT);
glBegin(GL_TRIANGLES);
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(-1.0f, -1.0f, 0.0f);
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(1.0f, -1.0f, 0.0f);
glEnd();
}
void framebuffer_size_callback(GLFWwindow* window, int width, int height) {
glViewport(0,0, width, height);
}
int main() {
glfwInit();
// Set OpenGL version to 1.2.
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 1);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
// Create a GLFW window.
GLFWwindow* window = glfwCreateWindow(800, 600, "Fixed Function OpenGL 1.2", nullptr, nullptr);
// Fail if the window has failed to create.
if (window == nullptr) {
const char* description;
glfwGetError(&description);
std::cout << "Failed to create GLFW window.\n" << description << std::endl;
return -1;
}
glfwMakeContextCurrent(window);
glMatrixMode(GL_PROJECTION);
glViewport(0,0, 800, 600);
glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
while (!glfwWindowShouldClose(window)) {
triangle();
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwTerminate();
return 0;
}

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@ -2,4 +2,5 @@ sources = [
'main.cc'
]
exe = executable('main', sources, dependencies: [glfw, libepoxy])
executable('main', sources, dependencies: [glfw, libepoxy])
executable('fixedfunction', ['fixedfunction.cc'], dependencies: [glfw, libepoxy])