Added gui_util

src/frontend/BlocksPreview.cpp

@@ -2,13 +2,13 @@
 
 #include <glm/ext.hpp>
 
+#include "../graphics/Viewport.h"
 #include "../graphics/Shader.h"
 #include "../graphics/Texture.h"
 #include "../graphics/Atlas.h"
 #include "../graphics/Batch3D.h"
 #include "../window/Camera.h"
 #include "../voxels/Block.h"
-#include "../window/Window.h"
 #include "ContentGfxCache.h"
 
 using glm::vec4;
@@ -25,13 +25,12 @@ BlocksPreview::~BlocksPreview() {
     delete batch;
 }
 
-void BlocksPreview::begin() {
+void BlocksPreview::begin(const Viewport* viewport) {
+    this->viewport = viewport;
     shader->use();
     shader->uniformMatrix("u_projview", 
-        glm::ortho(0.0f, 
-                    float(Window::width), 
-                   0.0f, 
-                    float(Window::height), 
+        glm::ortho(0.0f, float(viewport->getWidth()), 
+                   0.0f, float(viewport->getHeight()), 
                     -1000.0f, 1000.0f) * 
         glm::lookAt(vec3(2, 2, 2), vec3(0.0f), vec3(0, 1, 0)));
     atlas->getTexture()->bind();
@@ -39,10 +38,13 @@ void BlocksPreview::begin() {
 
 /* Draw one block preview at given screen position */
 void BlocksPreview::draw(const Block* def, int x, int y, int size, vec4 tint) {
-    y = Window::height - y - 1;
+    uint width = viewport->getWidth();
+    uint height = viewport->getHeight();
+
+    y = height - y - 1;
     x += 2;
     y -= 35;
-    shader->uniformMatrix("u_apply", glm::translate(glm::mat4(1.0f), vec3(x/float(Window::width) * 2, y/float(Window::height) * 2, 0.0f)));
+    shader->uniformMatrix("u_apply", glm::translate(glm::mat4(1.0f), vec3(x/float(width) * 2, y/float(height) * 2, 0.0f)));
     blockid_t id = def->rt.id;
     const UVRegion texfaces[6]{ cache->getRegion(id, 0), cache->getRegion(id, 1),
                                 cache->getRegion(id, 2), cache->getRegion(id, 3),