implement document resize with menu and dialog

src/canvas.cpp

@@ -136,7 +136,11 @@ void ui::Canvas::clear(const glm::vec4& c/*={0,0,0,1}*/)
     snap_history({ 0, 1, 2, 3, 4, 5 });
     m_layers[m_current_layer_idx].clear(c);
     m_unsaved = true;
-    App::I.title_update();
+}
+void ui::Canvas::clear_all()
+{
+    for (auto& l : m_layers)
+        l.clear({0, 0, 0, 0});
 }
 void ui::Canvas::snap_history(const std::vector<int>& planes)
 {
@@ -908,9 +912,9 @@ void ui::Canvas::resize(int width, int height)
         m_tex2[i].create(width, height, GL_RGBA8);
     }
     for (auto& l : m_layers)
-    {
-        l.create(width, height, "");
-    }
+        l.resize(width, height);
+    m_smask.create(width*2, height*2, "mask");
+    m_unsaved = true;
 }
 bool ui::Canvas::create(int width, int height)
 {
@@ -1733,12 +1737,13 @@ void ui::Canvas::project_open_thread(std::string file_path)
 
     int progress = 0;
     int total = n_layers * 6;
-
+    
     App::I.async_start();
     for (auto& l : m_layers)
         l.destroy();
     m_layers.clear();
     m_order.clear();
+    //clear_all();
     resize(m_width, m_height);
     App::I.async_end();
 
@@ -1757,6 +1762,7 @@ void ui::Canvas::project_open_thread(std::string file_path)
         fread(&name_len, sizeof(int), 1, fp);
         std::string name(name_len, '\0');
         fread((char*)name.data(), name_len, 1, fp);
+        snap.clear();
         for (int plane_index = 0; plane_index < 6; plane_index++)
         {
             int has_data;
@@ -1802,6 +1808,7 @@ void ui::Canvas::project_open_thread(std::string file_path)
         tmp_layers.emplace_back();
         tmp_layers.back().m_opacity = layer_opacity;
         tmp_layers.back().create(m_width, m_height, name.c_str());
+        tmp_layers.back().clear({0, 0, 0, 0});
         tmp_layers.back().restore(snap);
         tmp_order.push_back(n_order);
         App::I.async_end();
@@ -2106,12 +2113,20 @@ void ui::Layer::restore(const Snapshot& snap)
         m_dirty_box[i] = snap.m_dirty_box[i];
         m_dirty_face[i] = snap.m_dirty_face[i];
 
-        m_rtt[i].recreate(); // TODO: this should not be recreated here! Sorry I messed up with this, just quick fix DON'T SHIP!!
+        // TODO: this should not be recreated here!
+        // Sorry I messed up with this,
+        // it's just a quick fix DON'T SHIP!!
+        //m_rtt[i].recreate();
+        
         m_rtt[i].bindTexture();
         glm::vec2 box_sz = zw(m_dirty_box[i]) - xy(m_dirty_box[i]);
-        glTexSubImage2D(GL_TEXTURE_2D, 0, m_dirty_box[i].x, m_dirty_box[i].y, box_sz.x, box_sz.y, GL_RGBA, GL_UNSIGNED_BYTE, snap.image[i].get());
+        glTexSubImage2D(GL_TEXTURE_2D, 0,
+            m_dirty_box[i].x, m_dirty_box[i].y,
+            box_sz.x, box_sz.y, GL_RGBA, GL_UNSIGNED_BYTE,
+            snap.image[i].get());
         m_rtt[i].unbindTexture();
-        LOG("restore face %d - %d bytes (%dx%d)", i, (int)box_sz.x * (int)box_sz.y * 4, (int)box_sz.x, (int)box_sz.y);
+        LOG("restore face %d - %d bytes (%dx%d)", i,
+        (int)box_sz.x * (int)box_sz.y * 4, (int)box_sz.x, (int)box_sz.y);
     }
 }
 
@@ -2195,3 +2210,16 @@ bool ui::Layer::create(int width, int height, std::string name)
     }
     return true;
 }
+
+void ui::Layer::resize(int width, int height)
+{
+    glm::vec2 ratio = glm::vec2(width, height) / glm::vec2(w, h);
+    w = width;
+    h = height;
+    for (int i = 0; i < 6; i++)
+    {
+        m_rtt[i].resize(width, height);
+        m_dirty_box[i] = m_dirty_box[i] * glm::vec4(ratio, ratio);
+        //m_dirty_face[i] = true;
+    }
+}