Rewrite rendering engine (minetest#6253)

* Clean draw_*() arguments

* Split rendering core

* Add anaglyph 3D

* Interlaced 3D

* Drop obsolete methods

builtin/settingtypes.txt

@@ -608,6 +608,7 @@ fall_bobbing_amount (Fall bobbing factor) float 0.0
 #    -    topbottom: split screen top/bottom.
 #    -    sidebyside: split screen side by side.
 #    -    pageflip: quadbuffer based 3d.
+#    Note that the interlaced mode requires shaders to be enabled.
 3d_mode (3D mode) enum none none,anaglyph,interlaced,topbottom,sidebyside,pageflip
 
 #    In-game chat console height, between 0.1 (10%) and 1.0 (100%).

client/shaders/3d_interlaced_merge/opengl_fragment.glsl

@@ -0,0 +1,21 @@
+uniform sampler2D baseTexture;
+uniform sampler2D normalTexture;
+uniform sampler2D textureFlags;
+
+#define leftImage baseTexture
+#define rightImage normalTexture
+#define maskImage textureFlags
+
+void main(void)
+{
+	vec2 uv = gl_TexCoord[0].st;
+	vec4 left = texture2D(leftImage, uv).rgba;
+	vec4 right = texture2D(rightImage, uv).rgba;
+	vec4 mask = texture2D(maskImage, uv).rgba;
+	vec4 color;
+	if (mask.r > 0.5)
+		color = right;
+	else
+		color = left;
+	gl_FragColor = color;
+}

client/shaders/3d_interlaced_merge/opengl_vertex.glsl

@@ -0,0 +1,6 @@
+void main(void)
+{
+	gl_TexCoord[0] = gl_MultiTexCoord0;
+	gl_Position = gl_Vertex;
+	gl_FrontColor = gl_BackColor = gl_Color;
+}

minetest.conf.example

@@ -700,6 +700,7 @@
 #    -    topbottom: split screen top/bottom.
 #    -    sidebyside: split screen side by side.
 #    -    pageflip: quadbuffer based 3d.
+#    Note that the interlaced mode requires shaders to be enabled.
 #    type: enum values: none, anaglyph, interlaced, topbottom, sidebyside, pageflip
 # 3d_mode = none
 

src/client/CMakeLists.txt

@@ -1,9 +1,16 @@
 set(client_SRCS
+	${CMAKE_CURRENT_SOURCE_DIR}/render/anaglyph.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/render/core.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/render/factory.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/render/interlaced.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/render/pageflip.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/render/plain.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/render/sidebyside.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/render/stereo.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/renderingengine.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/clientlauncher.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/inputhandler.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/tile.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/joystick_controller.cpp
 	PARENT_SCOPE
 )
-

src/client/render/anaglyph.cpp

@@ -0,0 +1,51 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <[email protected]>
+Copyright (C) 2017 numzero, Lobachesky Vitaly <[email protected]>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "anaglyph.h"
+
+void RenderingCoreAnaglyph::drawAll()
+{
+	renderBothImages();
+	drawPostFx();
+	drawHUD();
+}
+
+void RenderingCoreAnaglyph::setupMaterial(int color_mask)
+{
+	video::SOverrideMaterial &mat = driver->getOverrideMaterial();
+	mat.Material.ColorMask = color_mask;
+	mat.EnableFlags = video::EMF_COLOR_MASK;
+	mat.EnablePasses = scene::ESNRP_SKY_BOX | scene::ESNRP_SOLID |
+			   scene::ESNRP_TRANSPARENT | scene::ESNRP_TRANSPARENT_EFFECT |
+			   scene::ESNRP_SHADOW;
+}
+
+void RenderingCoreAnaglyph::useEye(bool right)
+{
+	RenderingCoreStereo::useEye(right);
+	driver->clearZBuffer();
+	setupMaterial(right ? video::ECP_GREEN | video::ECP_BLUE : video::ECP_RED);
+}
+
+void RenderingCoreAnaglyph::resetEye()
+{
+	setupMaterial(video::ECP_ALL);
+	RenderingCoreStereo::resetEye();
+}

src/client/render/anaglyph.h

@@ -0,0 +1,34 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <[email protected]>
+Copyright (C) 2017 numzero, Lobachesky Vitaly <[email protected]>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+#include "stereo.h"
+
+class RenderingCoreAnaglyph : public RenderingCoreStereo
+{
+protected:
+	void setupMaterial(int color_mask);
+	void useEye(bool right) override;
+	void resetEye() override;
+
+public:
+	using RenderingCoreStereo::RenderingCoreStereo;
+	void drawAll() override;
+};

src/client/render/core.cpp

@@ -0,0 +1,101 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <[email protected]>
+Copyright (C) 2017 numzero, Lobachesky Vitaly <[email protected]>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "core.h"
+#include "camera.h"
+#include "client.h"
+#include "clientmap.h"
+#include "hud.h"
+#include "minimap.h"
+
+RenderingCore::RenderingCore(IrrlichtDevice *_device, Client *_client, Hud *_hud)
+    : device(_device), driver(device->getVideoDriver()), smgr(device->getSceneManager()),
+      guienv(device->getGUIEnvironment()), client(_client), camera(client->getCamera()),
+      mapper(client->getMinimap()), hud(_hud)
+{
+	screensize = driver->getScreenSize();
+	virtual_size = screensize;
+}
+
+RenderingCore::~RenderingCore()
+{
+	clearTextures();
+}
+
+void RenderingCore::initialize()
+{
+	// have to be called late as the VMT is not ready in the constructor:
+	initTextures();
+}
+
+void RenderingCore::updateScreenSize()
+{
+	virtual_size = screensize;
+	clearTextures();
+	initTextures();
+}
+
+void RenderingCore::draw(video::SColor _skycolor, bool _show_hud, bool _show_minimap,
+		bool _draw_wield_tool, bool _draw_crosshair)
+{
+	v2u32 ss = driver->getScreenSize();
+	if (screensize != ss) {
+		screensize = ss;
+		updateScreenSize();
+	}
+	skycolor = _skycolor;
+	show_hud = _show_hud;
+	show_minimap = _show_minimap;
+	draw_wield_tool = _draw_wield_tool;
+	draw_crosshair = _draw_crosshair;
+
+	beforeDraw();
+	drawAll();
+}
+
+void RenderingCore::draw3D()
+{
+	smgr->drawAll();
+	driver->setTransform(video::ETS_WORLD, core::IdentityMatrix);
+	if (!show_hud)
+		return;
+	hud->drawSelectionMesh();
+	if (draw_wield_tool)
+		camera->drawWieldedTool();
+}
+
+void RenderingCore::drawHUD()
+{
+	if (show_hud) {
+		if (draw_crosshair)
+			hud->drawCrosshair();
+		hud->drawHotbar(client->getPlayerItem());
+		hud->drawLuaElements(camera->getOffset());
+		camera->drawNametags();
+		if (mapper && show_minimap)
+			mapper->drawMinimap();
+	}
+	guienv->drawAll();
+}
+
+void RenderingCore::drawPostFx()
+{
+	client->getEnv().getClientMap().renderPostFx(camera->getCameraMode());
+}

src/client/render/core.h

@@ -0,0 +1,75 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <[email protected]>
+Copyright (C) 2017 numzero, Lobachesky Vitaly <[email protected]>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#pragma once
+#include "irrlichttypes_extrabloated.h"
+
+class Camera;
+class Client;
+class Hud;
+class Minimap;
+
+class RenderingCore
+{
+protected:
+	v2u32 screensize;
+	v2u32 virtual_size;
+	video::SColor skycolor;
+	bool show_hud;
+	bool show_minimap;
+	bool draw_wield_tool;
+	bool draw_crosshair;
+
+	IrrlichtDevice *device;
+	video::IVideoDriver *driver;
+	scene::ISceneManager *smgr;
+	gui::IGUIEnvironment *guienv;
+
+	Client *client;
+	Camera *camera;
+	Minimap *mapper;
+	Hud *hud;
+
+	void updateScreenSize();
+	virtual void initTextures() {}
+	virtual void clearTextures() {}
+
+	virtual void beforeDraw() {}
+	virtual void drawAll() = 0;
+
+	void draw3D();
+	void drawHUD();
+	void drawPostFx();
+
+public:
+	RenderingCore(IrrlichtDevice *_device, Client *_client, Hud *_hud);
+	RenderingCore(const RenderingCore &) = delete;
+	RenderingCore(RenderingCore &&) = delete;
+	virtual ~RenderingCore();
+
+	RenderingCore &operator=(const RenderingCore &) = delete;
+	RenderingCore &operator=(RenderingCore &&) = delete;
+
+	void initialize();
+	void draw(video::SColor _skycolor, bool _show_hud, bool _show_minimap,
+			bool _draw_wield_tool, bool _draw_crosshair);
+
+	inline v2u32 getVirtualSize() const { return virtual_size; }
+};

src/client/render/factory.cpp

@@ -0,0 +1,45 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <[email protected]>
+Copyright (C) 2017 numzero, Lobachesky Vitaly <[email protected]>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "factory.h"
+#include <stdexcept>
+#include "plain.h"
+#include "anaglyph.h"
+#include "interlaced.h"
+#include "pageflip.h"
+#include "sidebyside.h"
+
+RenderingCore *createRenderingCore(const std::string &stereo_mode, IrrlichtDevice *device,
+		Client *client, Hud *hud)
+{
+	if (stereo_mode == "none")
+		return new RenderingCorePlain(device, client, hud);
+	if (stereo_mode == "anaglyph")
+		return new RenderingCoreAnaglyph(device, client, hud);
+	if (stereo_mode == "interlaced")
+		return new RenderingCoreInterlaced(device, client, hud);
+	if (stereo_mode == "pageflip")
+		return new RenderingCorePageflip(device, client, hud);
+	if (stereo_mode == "sidebyside")
+		return new RenderingCoreSideBySide(device, client, hud);
+	if (stereo_mode == "topbottom")
+		return new RenderingCoreSideBySide(device, client, hud, true);
+	throw std::invalid_argument("Invalid rendering mode: " + stereo_mode);
+}

src/client/render/factory.h

@@ -0,0 +1,25 @@
+/*
+Minetest
+Copyright (C) 2010-2013 celeron55, Perttu Ahola <[email protected]>
+Copyright (C) 2017 numzero, Lobachesky Vitaly <[email protected]>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include <string>
+#include "core.h"
+
+RenderingCore *createRenderingCore(const std::string &stereo_mode, IrrlichtDevice *device,
+		Client *client, Hud *hud);