Allow to resize the SDL window and propagate changes to the scene.

doc/tutorial/02_cube.cpp

@@ -45,7 +45,7 @@ public:
         m_ready(false)
     {
         m_camera = new Camera();
-        m_camera->SetProjection(mat4::perspective(radians(30.f), 960.f, 600.f, .1f, 1000.f));
+        m_camera->SetProjection(mat4::perspective(radians(30.f), 640.f, 480.f, .1f, 1000.f));
         m_camera->SetView(mat4::lookat(vec3(-15.f, 5.f, 0.f),
             vec3(0.f, -1.f, 0.f),
             vec3(0.f, 1.f, 0.f)));

src/platform/sdl/sdlapp.cpp

@@ -1,7 +1,7 @@
 //
 //  Lol Engine
 //
-//  Copyright © 2010—2016 Sam Hocevar <sam@hocevar.net>
+//  Copyright © 2010—2019 Sam Hocevar <sam@hocevar.net>
 //
 //  Lol Engine is free software. It comes without any warranty, to
 //  the extent permitted by applicable law. You can redistribute it
@@ -69,7 +69,7 @@ SdlAppDisplay::SdlAppDisplay(char const *title, ivec2 res)
      * However, perfs warning have been may occur. */
     SDL_GL_SetAttribute(SDL_GL_SHARE_WITH_CURRENT_CONTEXT, 1);
 
-    int flags = SDL_WINDOW_OPENGL;
+    int flags = SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE;
     if (window_size == ivec2(0))
         flags |= SDL_WINDOW_FULLSCREEN_DESKTOP;
     data->m_window = SDL_CreateWindow(title,

src/platform/sdl/sdlinput.cpp

@@ -1,7 +1,7 @@
 //
 //  Lol Engine
 //
-//  Copyright © 2010—2017 Sam Hocevar <sam@hocevar.net>
+//  Copyright © 2010—2019 Sam Hocevar <sam@hocevar.net>
 //
 //  Lol Engine is free software. It comes without any warranty, to
 //  the extent permitted by applicable law. You can redistribute it
@@ -332,6 +332,9 @@ void SdlInputData::Tick(float seconds)
                 case SDL_WINDOWEVENT_FOCUS_LOST:
                     m_mouse->SetKey(3, false);
                     break;
+                case SDL_WINDOWEVENT_RESIZED:
+                    Video::Resize(ivec2(event.window.data1, event.window.data2));
+                    break;
             }
             break;
         }

src/scene.cpp

@@ -204,14 +204,15 @@ mutex SceneData::m_prim_mutex;
  * Public Scene class
  */
 Scene::Scene(ivec2 size)
-  : data(new SceneData())
-{
-    m_renderer = new Renderer(size);
-
-    data->m_renderbuffer[0] = new Framebuffer(size);
-    data->m_renderbuffer[1] = new Framebuffer(size);
-    data->m_renderbuffer[2] = new Framebuffer(size);
-    data->m_renderbuffer[3] = new Framebuffer(size);
+  : m_size(size),
+    m_wanted_size(size),
+    data(new SceneData()),
+    m_renderer(new Renderer(size))
+{
+    data->m_renderbuffer[0] = new Framebuffer(m_size);
+    data->m_renderbuffer[1] = new Framebuffer(m_size);
+    data->m_renderbuffer[2] = new Framebuffer(m_size);
+    data->m_renderbuffer[3] = new Framebuffer(m_size);
     data->m_pp.m_shader[0] = Shader::Create(LOLFX_RESOURCE_NAME(gpu_blit));
     data->m_pp.m_shader[1] = Shader::Create(LOLFX_RESOURCE_NAME(gpu_postprocess));
     data->m_pp.m_coord[0] = data->m_pp.m_shader[0]->GetAttribLocation(VertexUsage::Position, 0);
@@ -232,7 +233,7 @@ Scene::Scene(ivec2 size)
 
     /* Create a default orthographic camera, in case the user doesn’t. */
     data->m_default_cam = new Camera();
-    mat4 proj = mat4::ortho(0.f, (float)size.x, 0.f, (float)size.y, -1000.f, 1000.f);
+    mat4 proj = mat4::ortho(0.f, (float)m_size.x, 0.f, (float)m_size.y, -1000.f, 1000.f);
     data->m_default_cam->SetProjection(proj);
     PushCamera(data->m_default_cam);
 
@@ -248,6 +249,11 @@ Scene::Scene(ivec2 size)
     data->m_line_api.m_debug_mask = 1;
 }
 
+void Scene::resize(ivec2 size)
+{
+    m_wanted_size = size;
+}
+
 //-----------------------------------------------------------------------------
 Scene::~Scene()
 {
@@ -591,6 +597,23 @@ void Scene::pre_render(float)
 {
     gpu_marker("Pre Render");
 
+    // Handle resize event
+    if (m_size != m_wanted_size)
+    {
+        m_size = m_wanted_size;
+        delete data->m_renderbuffer[0];
+        delete data->m_renderbuffer[1];
+        delete data->m_renderbuffer[2];
+        delete data->m_renderbuffer[3];
+        data->m_renderbuffer[0] = new Framebuffer(m_size);
+        data->m_renderbuffer[1] = new Framebuffer(m_size);
+        data->m_renderbuffer[2] = new Framebuffer(m_size);
+        data->m_renderbuffer[3] = new Framebuffer(m_size);
+
+        mat4 proj = mat4::ortho(0.f, (float)m_size.x, 0.f, (float)m_size.y, -1000.f, 1000.f);
+        data->m_default_cam->SetProjection(proj);
+    }
+
     /* First render into the offline buffer */
     if (do_pp)
     {

src/scene.h

@@ -250,6 +250,8 @@ public:
     void EnableDisplay();
     void DisableDisplay();
 
+    void resize(ivec2 size);
+
     void pre_render(float seconds);
     void render(float seconds);
     void post_render(float seconds);
@@ -259,6 +261,8 @@ private:
     void render_tiles();
     void render_lines(float seconds);
 
+    ivec2 m_size, m_wanted_size;
+
     SceneData *data;
     Renderer *m_renderer;
 };

src/video.cpp

@@ -120,6 +120,11 @@ void Video::Capture(uint32_t *buffer)
 #endif
 }
 
+void Video::Resize(ivec2 size)
+{
+    Scene::GetScene(0).resize(size);
+}
+
 ivec2 Video::GetSize()
 {
     return Scene::GetScene(0).get_renderer()->GetViewport().extent();

src/video.h

@@ -1,11 +1,13 @@
 //
-// Lol Engine
+//  Lol Engine
 //
-// Copyright: (c) 2010-2011 Sam Hocevar <sam@hocevar.net>
-//   This program is free software; you can redistribute it and/or
-//   modify it under the terms of the Do What The Fuck You Want To
-//   Public License, Version 2, as published by Sam Hocevar. See
-//   http://www.wtfpl.net/ for more details.
+//  Copyright © 2010—2019 Sam Hocevar <sam@hocevar.net>
+//
+//  Lol Engine is free software. It comes without any warranty, to
+//  the extent permitted by applicable law. You can redistribute it
+//  and/or modify it under the terms of the Do What the Fuck You Want
+//  to Public License, Version 2, as published by the WTFPL Task Force.
+//  See http://www.wtfpl.net/ for more details.
 //
 
 #pragma once
@@ -49,6 +51,7 @@ public:
     static void Setup(ivec2 size);
     static void Destroy();
 
+    static void Resize(ivec2 size);
     static ivec2 GetSize();
 
     static void SetDebugRenderMode(DebugRenderMode d);