From 0020c3ef152041998e04a3e2d227e719509f2a63 Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Sun, 13 Dec 2015 02:30:25 +0300
Subject: Allow resize nacl window with OpenGL without recreating context.

---
 src/render/graphics.cpp    | 42 ++++++++++++++++++++++++++++++++----------
 src/render/naclfunctions.h | 35 +++++++++++++++++++++++++++++++++++
 src/render/naclgles.cpp    |  4 ++++
 src/render/naclgles.h      |  2 --
 4 files changed, 71 insertions(+), 12 deletions(-)
 create mode 100644 src/render/naclfunctions.h

(limited to 'src/render')

diff --git a/src/render/graphics.cpp b/src/render/graphics.cpp
index ca97e86ee..16e28b5fe 100644
--- a/src/render/graphics.cpp
+++ b/src/render/graphics.cpp
@@ -78,6 +78,7 @@
 #ifdef USE_OPENGL
 #include "resources/openglimagehelper.h"
 #if defined(__native_client__)
+#include "render/naclfunctions.h"
 #include "render/naclgles.h"
 #endif
 #endif
@@ -512,7 +513,7 @@ bool Graphics::resizeScreen(const int width, const int height)
     // Setup OpenGL
     glViewport(0, 0, mActualWidth, mActualHeight);
     glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
-#else
+#else  // USE_OPENGL
     // +++ need impliment resize in soft mode
 #endif  // USE_OPENGL
 
@@ -520,23 +521,44 @@ bool Graphics::resizeScreen(const int width, const int height)
     beginDraw();
     return true;
 
-#else
+#else  // USE_SDL2
+
     const int prevWidth = mWidth;
     const int prevHeight = mHeight;
 
     endDraw();
 
-    const bool success = setVideoMode(width, height, mScale, mBpp,
-        mFullscreen, mHWAccel, mEnableResize, mNoFrame);
+    const bool success = true;
+#ifdef __native_client__
+    if (mOpenGL != RENDER_SOFTWARE)
+    {
+        mRect.w = static_cast<int32_t>(width / mScale);
+        mRect.h = static_cast<int32_t>(height / mScale);
+        mWidth = width / mScale;
+        mHeight = height / mScale;
+        mActualWidth = width;
+        mActualHeight = height;
+#ifdef USE_OPENGL
+        naclResizeBuffers(mActualWidth, mActualHeight);
+        glViewport(0, 0, mActualWidth, mActualHeight);
+#endif  // USE_OPENGL
 
-    // If it didn't work, try to restore the previous size. If that didn't
-    // work either, bail out (but then we're in deep trouble).
-    if (!success)
+    }
+    else
+#endif  // __native_client__
     {
-        if (!setVideoMode(prevWidth, prevHeight, mScale, mBpp,
-            mFullscreen, mHWAccel, mEnableResize, mNoFrame))
+        bool success = setVideoMode(width, height, mScale, mBpp,
+            mFullscreen, mHWAccel, mEnableResize, mNoFrame);
+
+        // If it didn't work, try to restore the previous size. If that didn't
+        // work either, bail out (but then we're in deep trouble).
+        if (!success)
         {
-            return false;
+            if (!setVideoMode(prevWidth, prevHeight, mScale, mBpp,
+                mFullscreen, mHWAccel, mEnableResize, mNoFrame))
+            {
+                return false;
+            }
         }
     }
 
diff --git a/src/render/naclfunctions.h b/src/render/naclfunctions.h
new file mode 100644
index 000000000..940d02015
--- /dev/null
+++ b/src/render/naclfunctions.h
@@ -0,0 +1,35 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2015  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef RENDER_NACLFUNCTIONS_H
+#define RENDER_NACLFUNCTIONS_H
+
+#if defined(__native_client__) && defined(USE_OPENGL)
+
+#include <ppapi/c/ppb_graphics_3d.h>
+
+extern const struct PPB_Graphics3D_1_0 *graphics3dInterface;
+extern PP_Resource gles2Context;
+
+#define naclResizeBuffers(...) \
+    graphics3dInterface->ResizeBuffers(gles2Context, __VA_ARGS__)
+
+#endif  // defined(__native_client__) && defined(USE_OPENGL)
+#endif  // RENDER_NACLFUNCTIONS_H
diff --git a/src/render/naclgles.cpp b/src/render/naclgles.cpp
index ef53e6849..6451b6a36 100644
--- a/src/render/naclgles.cpp
+++ b/src/render/naclgles.cpp
@@ -28,6 +28,7 @@
 
 #include <ppapi_simple/ps.h>
 
+#include <ppapi/c/ppb_graphics_3d.h>
 #include <ppapi/c/ppb_opengles2.h>
 
 #include <ppapi/gles2/gl2ext_ppapi.h>
@@ -36,11 +37,14 @@
 
 const struct PPB_OpenGLES2* gles2Interface = nullptr;
 PP_Resource gles2Context = nullptr;
+const struct PPB_Graphics3D_1_0 *graphics3dInterface = nullptr;
 
 void NaclGles::initGles()
 {
     gles2Interface = static_cast<const PPB_OpenGLES2*>(
         PSGetInterface(PPB_OPENGLES2_INTERFACE));
+    graphics3dInterface = static_cast<const PPB_Graphics3D_1_0*>(
+        PSGetInterface(PPB_GRAPHICS_3D_INTERFACE_1_0));
     gles2Context = glGetCurrentContextPPAPI();
 
     logger->log("InitGles: %p, %d", gles2Interface, gles2Context);
diff --git a/src/render/naclgles.h b/src/render/naclgles.h
index 44b1a1f97..aaa4459d2 100644
--- a/src/render/naclgles.h
+++ b/src/render/naclgles.h
@@ -23,8 +23,6 @@
 
 #if defined(__native_client__) && defined(USE_OPENGL)
 
-#include <ppapi/c/ppb_opengles2.h>
-
 namespace NaclGles
 {
     void initGles();
-- 
cgit v1.2.3-60-g2f50