Loaded texture correctly

shaders/frag.glsl

@@ -1,7 +1,11 @@
 #version 330 core
 out vec4 FragColor;
 
+in vec2 TexCoord;
+
+uniform sampler2D ourTexture;
+
 void main()
 {
-   FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+   FragColor = texture(ourTexture, TexCoord);
 }

shaders/vert.glsl

@@ -1,10 +1,14 @@
 #version 330 core
 layout (location = 0) in vec3 aPos;
+layout (location = 1) in vec2 aTexCoord;
+
+out vec2 TexCoord;
 
 uniform mat4 MVP;
 
 void main()
 {
   gl_Position = MVP * vec4(aPos.x, aPos.y, aPos.z, 1.0);
+  TexCoord = aTexCoord;
 }
 

src/main.c

@@ -1,9 +1,12 @@
 #include <GL/glew.h>
 #include <SDL3/SDL.h>
+#include <SDL3/SDL_surface.h>
 #include <stdlib.h>
 
 #include "SDL3/SDL_events.h"
 #include "SDL3/SDL_keycode.h"
+#include "SDL3/SDL_surface.h"
+#include "SDL3_image/SDL_image.h"
 #include "camera.h"
 #include "shader.h"
 #include "window.h"
@@ -76,15 +79,16 @@ int main(int argc, char *argv[]) {
 
   // set up vertex data (and buffer(s)) and configure vertex attributes
   float vertices[] = {
-      0.5f,  0.5f,  0.0f, // top right
-      0.5f,  -0.5f, 0.0f, // bottom right
-      -0.5f, -0.5f, 0.0f, // bottom left
-      -0.5f, 0.5f,  0.0f  // top left
+      0.5f,  0.5f,  0.0f, 1.0f, 1.0f, // top right
+      0.5f,  -0.5f, 0.0f, 1.0f, 0.0f, // bottom right
+      -0.5f, -0.5f, 0.0f, 0.0f, 0.0f, // bottom left
+      -0.5f, 0.5f,  0.0f, 0.0f, 1.0f  // top left
   };
   unsigned int indices[] = {
       0, 1, 3, // first Triangle
       1, 2, 3  // second Triangle
   };
+
   unsigned int VBO, VAO, EBO;
   glGenVertexArrays(1, &VAO);
   glGenBuffers(1, &VBO);
@@ -100,13 +104,16 @@ int main(int argc, char *argv[]) {
   glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices,
                GL_STATIC_DRAW);
 
-  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void *)0);
+  glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(float), (void *)0);
   glEnableVertexAttribArray(0);
+  glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(float),
+                        (void *)(3 * sizeof(float)));
+  glEnableVertexAttribArray(1);
 
   // note that this is allowed, the call to glVertexAttribPointer registered VBO
   // as the vertex attribute's bound vertex buffer object so afterwards we can
   // safely unbind
-  glBindBuffer(GL_ARRAY_BUFFER, 0);
+  // glBindBuffer(GL_ARRAY_BUFFER, 0);
 
   // remember: do NOT unbind the EBO while a VAO is active as the bound element
   // buffer object IS stored in the VAO; keep the EBO bound.
@@ -116,11 +123,49 @@ int main(int argc, char *argv[]) {
   // modify this VAO, but this rarely happens. Modifying other VAOs requires a
   // call to glBindVertexArray anyways so we generally don't unbind VAOs (nor
   // VBOs) when it's not directly necessary.
-  glBindVertexArray(0);
+  // glBindVertexArray(0);
+
+  // Texture Load
+  SDL_Surface *image = IMG_Load("./testxure.png");
+  if (image == NULL) {
+    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load texture");
+    return EXIT_FAILURE;
+  }
+  SDL_FlipSurface(image, SDL_FLIP_VERTICAL);
+
+  GLuint texture;
+  glActiveTexture(GL_TEXTURE0);
+  glGenTextures(1, &texture);
+
+  // Handle different SDL Surface data types
+  int mode = GL_RGBA;
+  //  if (image->format->BytesPerPixel == 4) {
+  //    mode = GL_RGBA;
+  //  }
+
+  glBindTexture(GL_TEXTURE_2D, texture);
+  // set the texture wrapping parameters
+  glTexParameteri(
+      GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
+      GL_REPEAT); // set texture wrapping to GL_REPEAT (default wrapping method)
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+  // set texture filtering parameters
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+
+  glTexImage2D(GL_TEXTURE_2D, 0, mode, image->w, image->h, 0, mode,
+               GL_UNSIGNED_BYTE, image->pixels);
+
+  glGenerateMipmap(GL_TEXTURE_2D);
+  SDL_DestroySurface(image);
 
   // Initialise camera
   Camera camera = Camera_default;
 
+  // set our texture uniform
+  glUseProgram(shader->shaderProgram);
+  glUniform1i(glGetUniformLocation(shader->shaderProgram, "ourTexture"), 0);
+
   bool wants_running = true;
   while (wants_running) {
     // TODO: Create event handler files
@@ -153,9 +198,11 @@ int main(int argc, char *argv[]) {
 
     // draw our first triangle
     glUseProgram(shader->shaderProgram);
-    glBindVertexArray(
-        VAO); // seeing as we only have a single VAO there's no need to bind it
+
+    // 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
+    glBindVertexArray(VAO);
+
     // glDrawArrays(GL_TRIANGLES, 0, 6);
     glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
     // glBindVertexArray(0); // no need to unbind it every time