From d7ad154d20888a4880b5dfba1d81713439168c39 Mon Sep 17 00:00:00 2001
From: shinya <sigma@goon.com>
Date: Thu, 21 May 2026 12:30:30 +0200
Subject: [PATCH] updated ai shader

---
 shader_example/motion.frag |  1 -
 shader_example/shader.cpp  | 30 ++++++++++++++++++++++++------
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/shader_example/motion.frag b/shader_example/motion.frag
index 50f5edf..084121d 100644
--- a/shader_example/motion.frag
+++ b/shader_example/motion.frag
@@ -1,5 +1,4 @@
 #version 330 core
-precision mediump float;
 
 in vec2 uv;
 
diff --git a/shader_example/shader.cpp b/shader_example/shader.cpp
index 355defa..fc4c952 100644
--- a/shader_example/shader.cpp
+++ b/shader_example/shader.cpp
@@ -24,6 +24,14 @@ GLuint compile(GLenum t, const std::string& src)
     const char* c = src.c_str();
     glShaderSource(s, 1, &c, NULL);
     glCompileShader(s);
+
+    GLint ok = 0;
+    glGetShaderiv(s, GL_COMPILE_STATUS, &ok);
+    if (!ok) {
+        char log[1024];
+        glGetShaderInfoLog(s, sizeof(log), NULL, log);
+        std::cout << "shader compile failed:\n" << log;
+    }
     return s;
 }
 
@@ -37,9 +45,9 @@ int main()
     glewInit();
 
     // ---------------- LOAD IMAGES ----------------
-    int w,h,c;
-    unsigned char* img1 = stbi_load("frame1.jpg",&w,&h,&c,4);
-    unsigned char* img2 = stbi_load("frame2.jpg",&w,&h,&c,4);
+    int w,h;
+    unsigned char* img1 = stbi_load("frame1.jpg",&w,&h,NULL,4);
+    unsigned char* img2 = stbi_load("frame2.jpg",&w,&h,NULL,4);
 
     if(!img1 || !img2)
     {
@@ -48,9 +56,9 @@ int main()
     }
 
     // ---------------- TEXTURES ----------------
-    GLuint texA, texB;
-    glGenTextures(1,&texA);
-    glGenTextures(1,&texB);
+    GLuint tex[2];
+    glGenTextures(2, tex);
+    GLuint texA = tex[0], texB = tex[1];
 
     auto upload = [&](GLuint t, unsigned char* d)
     {
@@ -86,6 +94,14 @@ int main()
     glAttachShader(prog,f);
     glLinkProgram(prog);
 
+    GLint linked = 0;
+    glGetProgramiv(prog, GL_LINK_STATUS, &linked);
+    if (!linked) {
+        char log[1024];
+        glGetProgramInfoLog(prog, sizeof(log), NULL, log);
+        std::cout << "program link failed:\n" << log;
+    }
+
     // ---------------- QUAD (FIXED) ----------------
     GLuint vao,vbo;
 
@@ -142,6 +158,8 @@ int main()
     glReadPixels(0,0,w,h,GL_RGBA,GL_UNSIGNED_BYTE,out.data());
 
     stbi_write_jpg("frameO.jpg",w,h,4,out.data(),90);
+    stbi_image_free(img1);
+    stbi_image_free(img2);
 
     std::cout << "done\n";
 }