Don't hardcode the window size

Author: Luflosi

kitty/shaders.c

@@ -185,8 +185,8 @@ void setup_scroll(int UNUSED width, int UNUSED height) {
     glGenTextures(1, &scroll_texture);
     glBindTexture(GL_TEXTURE_2D, scroll_texture);
     printf("%d %d\n", width, height);
-    //glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
-    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 640, 400, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
+    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
+    //glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 640, 400, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     glBindTexture(GL_TEXTURE_2D, 0);