~ Current status of the project (basic shader support and shader precompilation steps)

Signed-off-by: Alexis Maiquez <almamu@almamu.com>

.idea/.name

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+wallengine

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+    </entry>
+    <entry file="file://$PROJECT_DIR$/BasicShaderLoader.cpp">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="475">
+          <caret line="115" column="56" lean-forward="false" selection-start-line="115" selection-start-column="56" selection-end-line="115" selection-end-column="56" />
+          <folding>
+            <element signature="e#0#21#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/res/shaders/effects/waterripple_opengl.vert">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="144">
+          <caret line="12" column="22" lean-forward="false" selection-start-line="12" selection-start-column="22" selection-end-line="12" selection-end-column="22" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/nier_test.cpp">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="528">
+          <caret line="44" column="64" lean-forward="false" selection-start-line="44" selection-start-column="64" selection-end-line="44" selection-end-column="64" />
+          <folding>
+            <element signature="e#0#21#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+  </component>
+</project>

BasicShaderLoader.cpp

@@ -0,0 +1,147 @@
+#include <irrlicht.h>
+#include <iostream>
+#include <fstream>
+#include <string>
+#include "BasicShaderLoader.h"
+#include "nier_test.h"
+#include "common.h"
+
+BasicShaderLoader::BasicShaderLoader (irr::io::path file, Type type)
+{
+    this->m_content =	"#version 120\n"
+                        "#define texSample2D texture2D\n"
+                        "#define frac fract\n";
+
+    std::ifstream _in (file.c_str ());
+    this->m_content.append (std::istreambuf_iterator<char> (_in), std::istreambuf_iterator<char> ());
+    this->m_type = type;
+}
+
+bool BasicShaderLoader::peekString(std::string str, std::string::const_iterator& it)
+{
+    std::string::const_iterator check = str.begin();
+    std::string::const_iterator cur = it + 1;
+
+    while (cur != this->m_content.end () && check != str.end ())
+    {
+        if (*cur != *check) return false;
+
+        cur ++; check ++;
+    }
+
+    if (check != str.end ())
+    {
+        return false;
+    }
+
+    it = cur;
+
+    return true;
+}
+
+void BasicShaderLoader::ignoreSpaces(std::string::const_iterator &it)
+{
+    while (it != this->m_content.end() && (*it == ' ' || *it == '\t')) it ++;
+}
+
+std::string BasicShaderLoader::extractQuotedValue(std::string::const_iterator& it)
+{
+    std::string::const_iterator cur = it;
+
+    if (*cur != '"')
+    {
+        m_error = true;
+        m_errorInfo = "Expected opening \" but got " + (*cur);
+        return "";
+    }
+
+    cur ++;
+
+    while (cur != this->m_content.end () && *cur != '\n' && *cur != '"') cur ++;
+
+    if (cur == this->m_content.end ())
+    {
+        m_error = true;
+        m_errorInfo = "Expected closing \" not found";
+        it = cur;
+        return "";
+    }
+
+    std::string filename = std::string (++it, cur);
+
+    it = cur;
+    return filename;
+}
+
+std::string BasicShaderLoader::lookupShaderFile (std::string filename)
+{
+    irr::io::path shaderTest = _example_base_folder; shaderTest += "/"; shaderTest += filename.c_str ();
+    irr::io::IFileSystem *fs = device->getFileSystem ();
+
+    // by default try to load from current folder
+    // we might want, in the future, to load things from different folders
+    // to provide standard functionality
+    if (fs->existFile (shaderTest) == false)
+    {
+        this->m_error = true;
+        this->m_errorInfo = "Cannot find file " + filename + " to include";
+        return "";
+    }
+
+    // open the file, read content and close it
+    irr::io::IReadFile* readFile = fs->createAndOpenFile (shaderTest);
+    char* buffer = (char*) malloc (readFile->getSize () + 1);
+    memset (buffer, 0, readFile->getSize() + 1);
+
+    readFile->read (buffer, readFile->getSize ());
+    readFile->drop ();
+
+    std::string output = buffer;
+
+    free (buffer);
+
+    return output;
+}
+
+std::string* BasicShaderLoader::precompile ()
+{
+    // parse the shader and find #includes and such things and translate them to the correct name
+    // also remove any #version definition to prevent errors
+    std::string::const_iterator it = this->m_content.begin ();
+
+    // search preprocessor macros and parse them
+    while (it != this->m_content.end () && this->m_error == false)
+    {
+        // TODO: on precompilation steps search for attributes and replace them
+        // TODO: with the correct opengl shader variable
+        if (*it == '#')
+        {
+            if (this->peekString ("include", it) == true)
+            {
+                std::string filename = "";
+
+                // ignore whitespaces
+                this->ignoreSpaces(it);
+                // extract value between quotes
+                filename = this->extractQuotedValue(it);
+
+                // try to find the file first
+                this->m_compiledContent += "// begin of included from file " + filename + "\r\n";
+                this->m_compiledContent += this->lookupShaderFile (filename);
+                this->m_compiledContent += "\r\n// end of included from file " + filename + "\r\n";
+            }
+            else
+            {
+                this->m_compiledContent += '#';
+            }
+        }
+        else
+        {
+            this->m_compiledContent += *it;
+        }
+
+        it ++;
+    }
+
+    return &this->m_compiledContent;
+}

BasicShaderLoader.h

@@ -0,0 +1,34 @@
+#ifndef __BASIC_SHADER_LOADER_H__
+#define __BASIC_SHADER_LOADER_H__
+
+#include <iostream>
+
+/**
+ * A basic shader loader that adds basic function definitions to every loaded shader
+ */
+class BasicShaderLoader
+{
+public:
+    enum Type
+    {
+        Type_Vertex = 0,
+        Type_Pixel = 1,
+    };
+
+    BasicShaderLoader (irr::io::path file, Type type);
+    std::string* precompile ();
+
+private:
+    bool peekString (std::string str, std::string::const_iterator& it);
+    void ignoreSpaces (std::string::const_iterator& it);
+    std::string extractQuotedValue (std::string::const_iterator& it);
+    std::string lookupShaderFile (std::string filename);
+
+    std::string m_content;
+    std::string m_compiledContent;
+    bool m_error;
+    std::string m_errorInfo;
+    Type m_type;
+};
+
+#endif /* !__BASIC_SHADER_LOADER_H__ */

CMakeLists.txt

@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.0)
+project(wallengine)
+
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_FLAGS "-fpermissive")
+
+find_package(X11 REQUIRED)
+find_package(OpenGL REQUIRED)
+find_package(GLUT REQUIRED)
+find_package(ZLIB REQUIRED)
+
+add_library(irrlicht STATIC IMPORTED)
+set_property(TARGET irrlicht PROPERTY IMPORTED_LOCATION ../../lib/irrlicht/lib/Linux/libIrrlicht.a)
+
+include_directories(${X11_INCLUDE_DIR} "../lib/irrlicht/include")
+
+add_executable(wallengine main.cpp common.h nier_test.cpp BasicShaderLoader.h BasicShaderLoader.cpp nier_test.h)
+
+target_link_libraries(wallengine ${X11_LIBRARIES} ${X11_Xxf86vm_LIB} ${OPENGL_LIBRARIES} ${GLUT_LIBRARIES} ${ZLIB_LIBRARIES} irrlicht)

CMakeModules/FindIrrlicht.cmake

@@ -0,0 +1,25 @@
+FIND_PATH(IRRLICHT_INCLUDE_DIR irrlicht/irrlicht.h
+        PATHS $ENV{IRRDIR}/include
+        PATH_SUFFIXES irrlicht
+        )
+
+MESSAGE(STATUS "IRRLICHT_INCLUDE_DIR = ${IRRLICHT_INCLUDE_DIR}")
+
+FIND_LIBRARY(IRRLICHT_LIBRARY NAMES Irrlicht
+        PATHS $ENV{IRRDIR}/lib
+        )
+
+MESSAGE(STATUS "IRRLICHT_LIBRARY = ${IRRLICHT_LIBRARY}")
+
+# handle the QUIETLY and REQUIRED arguments and set IRRLICHT_FOUND to TRUE if
+# all listed variables are TRUE
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(IRRLICHT DEFAULT_MSG IRRLICHT_LIBRARY IRRLICHT_INCLUDE_DIR)
+
+IF(IRRLICHT_FOUND)
+    SET(IRRLICHT_LIBRARIES ${IRRLICHT_LIBRARY})
+ELSE(IRRLICHT_FOUND)
+    SET(IRRLICHT_LIBRARIES)
+ENDIF(IRRLICHT_FOUND)
+
+MARK_AS_ADVANCED(IRRLICHT_LIBRARY IRRLICHT_INCLUDE_DIR)

common.h

@@ -0,0 +1,12 @@
+//
+// Created by almamu on 27/06/18.
+//
+
+#ifndef TEMP_COMMON_H
+#define TEMP_COMMON_H
+
+extern int WinID;
+extern irr::video::IVideoDriver* driver;
+extern irr::IrrlichtDevice* device;
+
+#endif //TEMP_COMMON_H

main.cpp

@@ -0,0 +1,72 @@
+#include <iostream>
+#include <irrlicht.h>
+#include <sstream>
+#include "nier_test.h"
+
+int WinID = 0;
+
+int game_test_main();
+
+int main(int argc, char* argv[])
+{
+    // parse the integer if it exists
+    if (argc >= 1)
+    {
+        std::stringstream ss;
+        ss << std::hex << argv[1];
+        ss >> WinID;
+    }
+
+    printf("Initializing X11 to %d\n", WinID);
+
+    return game_test_main ();
+}
+
+irr::IrrlichtDevice* device = nullptr;
+irr::video::IVideoDriver* driver = nullptr;
+irr::SIrrlichtCreationParameters _irr_params;
+
+int init_driver ()
+{
+    // prepare basic configuration for irrlicht
+    _irr_params.AntiAlias = 8;
+    _irr_params.Bits = 16;
+    // _irr_params.DeviceType = irr::EIDT_X11;
+    _irr_params.DriverType = irr::video::EDT_OPENGL;
+    _irr_params.Doublebuffer = true;
+    _irr_params.EventReceiver = nullptr;
+    _irr_params.Fullscreen = false;
+    _irr_params.HandleSRGB = false;
+    _irr_params.IgnoreInput = true;
+    _irr_params.Stencilbuffer = true;
+    _irr_params.UsePerformanceTimer = false;
+    _irr_params.Vsync = false;
+    _irr_params.WithAlphaChannel = false;
+    _irr_params.ZBufferBits = 24;
+    _irr_params.LoggingLevel = irr::ELL_DEBUG;
+    _irr_params.WindowId = reinterpret_cast<void*> (WinID);
+
+    device = irr::createDeviceEx (_irr_params);
+
+    if (device == nullptr)
+    {
+        return 1;
+    }
+
+    device->setWindowCaption (L"Test game");
+    driver = device->getVideoDriver();
+
+    return 0;
+}
+
+int game_test_main ()
+{
+    if (init_driver())
+    {
+        return 1;
+    }
+
+    nier_test ();
+
+    return 0;
+}

nier_test.cpp

@@ -0,0 +1,242 @@
+#include <irrlicht.h>
+#include <cstdint>
+#include <iostream>
+
+#include "common.h"
+#include "BasicShaderLoader.h"
+
+irr::io::path _example_base_folder = "../res/";
+irr::f32 g_AnimationSpeed = 0.1f;
+irr::f32 g_Scale = 2.5f;
+irr::f32 g_ScrollSpeed = 0.0f;
+irr::f32 g_Direction = 0.0f;
+irr::f32 g_Strength = 0.07f;
+irr::f32 g_SpecularPower = 1.0f;
+irr::f32 g_SpecularStrength = 1.0f;
+irr::f32 g_SpecularColor [3] = {1.0f, 1.0f, 1.0f};
+irr::f32 g_Texture1Resolution [4] = {1.0f, 1.0f, 1.0f, 1.0f};
+irr::f32 g_Texture0 = 0;
+irr::f32 g_Texture1 = 1;
+irr::f32 g_Texture2 = 2;
+irr::f32 g_Time = 0;
+irr::core::vector3df _map_size = irr::core::vector3df (21, 11.5f, 16);
+
+class MyShaderCallback : public irr::video::IShaderConstantSetCallBack
+{
+    virtual void OnSetConstants (irr::video::IMaterialRendererServices* services, int32_t userData)
+    {
+        irr::video::IVideoDriver* driver = services->getVideoDriver ();
+
+        irr::core::matrix4 worldViewProj;
+        worldViewProj = driver->getTransform(irr::video::ETS_PROJECTION);
+        worldViewProj *= driver->getTransform(irr::video::ETS_VIEW);
+        worldViewProj *= driver->getTransform(irr::video::ETS_WORLD);
+
+        services->setVertexShaderConstant ("g_AnimationSpeed", &g_AnimationSpeed, 1);
+        services->setVertexShaderConstant ("g_Scale", &g_Scale, 1);
+        services->setVertexShaderConstant ("g_ScrollSpeed", &g_ScrollSpeed, 1);
+        services->setVertexShaderConstant ("g_Direction", &g_Direction, 1);
+        services->setVertexShaderConstant ("g_Time", &g_Time, 1);
+        services->setVertexShaderConstant ("g_ModelViewProjectionMatrix", worldViewProj.pointer(), 16);
+        services->setVertexShaderConstant ("g_Texture0Resolution", g_Texture1Resolution, 4);
+        services->setVertexShaderConstant ("g_Texture1Resolution", g_Texture1Resolution, 4);
+        services->setVertexShaderConstant ("g_Texture2Resolution", g_Texture1Resolution, 4);
+
+        // TODO: Support up to 7 materials (as wallpaper engine)
+        services->setPixelShaderConstant ("g_Strength", &g_Strength, 1);
+        services->setPixelShaderConstant ("g_SpecularPower", &g_SpecularPower, 1);
+        services->setPixelShaderConstant ("g_SpecularStrength", &g_SpecularStrength, 1);
+        services->setPixelShaderConstant ("g_SpecularColor", g_SpecularColor, 3);
+        services->setPixelShaderConstant ("g_Texture0", &g_Texture0, 1);
+        services->setPixelShaderConstant ("g_Texture1", &g_Texture1, 1);
+        services->setPixelShaderConstant ("g_Texture2", &g_Texture2, 1);
+    }
+};
+
+class QuadSceneNode : public irr::scene::ISceneNode
+{
+    irr::core::aabbox3d <irr::f32> m_box;
+    irr::video::S3DVertex m_vertices [4];
+    irr::video::SMaterial m_material;
+
+public:
+    QuadSceneNode (irr::scene::ISceneNode* parent, irr::scene::ISceneManager* sceneManager, int32_t id)
+            : irr::scene::ISceneNode (parent, sceneManager, id)
+    {
+        m_material.Wireframe = false;
+        m_material.Lighting = false;
+
+        m_vertices[0].Pos = irr::core::vector3df ( _map_size.X,  _map_size.Y, 0.0f); // bottom right
+        m_vertices[1].Pos = irr::core::vector3df ( _map_size.X, -_map_size.Y, 0.0f); // top right
+        m_vertices[2].Pos = irr::core::vector3df (-_map_size.X, -_map_size.Y, 0.0f); // top left
+        m_vertices[3].Pos = irr::core::vector3df (-_map_size.X,  _map_size.Y, 0.0f); // bottom left
+
+        m_vertices[0].TCoords = irr::core::vector2df (1.0f, 0.0f);
+        m_vertices[1].TCoords = irr::core::vector2df (1.0f, 1.0f);
+        m_vertices[2].TCoords = irr::core::vector2df (0.0f, 1.0f);
+        m_vertices[3].TCoords = irr::core::vector2df (0.0f, 0.0f);
+
+        m_vertices[0].Color = irr::video::SColor (255, 255, 255, 255);
+        m_vertices[1].Color = irr::video::SColor (255, 255, 255, 255);
+        m_vertices[2].Color = irr::video::SColor (255, 255, 255, 255);
+        m_vertices[3].Color = irr::video::SColor (255, 255, 255, 255);
+
+        m_box.reset (m_vertices[0].Pos);
+        for (int32_t i = 1; i < 4; i ++)
+        {
+            m_box.addInternalPoint (m_vertices [i].Pos);
+        }
+    }
+
+    virtual void OnRegisterSceneNode ()
+    {
+        if (IsVisible)
+            SceneManager->registerNodeForRendering (this);
+
+        ISceneNode::OnRegisterSceneNode ();
+    }
+
+    virtual void render ()
+    {
+        uint16_t indices[] = {
+                0, 1, 2, 3
+        };
+
+        irr::video::IVideoDriver* driver = SceneManager->getVideoDriver ();
+
+        driver->setMaterial (m_material);
+        driver->drawVertexPrimitiveList (m_vertices, 4, indices, 1, irr::video::EVT_STANDARD, irr::scene::EPT_QUADS, irr::video::EIT_16BIT);
+    }
+
+    virtual const irr::core::aabbox3d <irr::f32>& getBoundingBox () const
+    {
+        return m_box;
+    }
+
+    virtual uint32_t getMaterialCount () const
+    {
+        return 1;
+    }
+
+    virtual irr::video::SMaterial& getMaterial (uint32_t i)
+    {
+        return m_material;
+    }
+};
+
+int nier_test ()
+{
+    irr::io::path _water_example = _example_base_folder; _water_example += "materials/water-intact.png";
+    irr::io::path _mud_example = _example_base_folder; _mud_example += "materials/plant-on-water.png";
+    irr::io::path _background_example = _example_base_folder; _background_example += "materials/top-part.png";
+    irr::io::path _waterripple_normal = _example_base_folder; _waterripple_normal += "materials/effects/waterripplenormal.png";
+    irr::io::path _waterripple_frag_shader = _example_base_folder; _waterripple_frag_shader += "shaders/effects/waterripple_opengl.frag";
+    irr::io::path _waterripple_vert_shader = _example_base_folder; _waterripple_vert_shader += "shaders/effects/waterripple_opengl.vert";
+    irr::io::path _white = _example_base_folder; _white += "materials/white.png";
+
+    /*irr::video::E_DRIVER_TYPE driverType = irr::video::E_DRIVER_TYPE::EDT_OPENGL;
+    device = irr::createDevice (driverType, irr::core::dimension2d<uint32_t>(1280, 720));
+
+    device->setWindowCaption (L"Wallpaper engine simulation v0.1");
+    driver = device->getVideoDriver ();*/
+
+    // check for ps and vs support
+    if (driver->queryFeature (irr::video::EVDF_PIXEL_SHADER_1_1) == false && driver->queryFeature (irr::video::EVDF_ARB_FRAGMENT_PROGRAM_1) == false)
+    {
+        device->getLogger ()->log ("WARNING: Pixel shaders disabled because of missing driver/hardware support");
+        _waterripple_frag_shader = "";
+    }
+
+    if (driver->queryFeature (irr::video::EVDF_VERTEX_SHADER_1_1) == false && driver->queryFeature (irr::video::EVDF_ARB_VERTEX_PROGRAM_1) == false)
+    {
+        device->getLogger ()->log ("WARNING: Vertex shaders disabled because of missing driver/hardware support");
+        _waterripple_vert_shader = "";
+    }
+
+    irr::video::IGPUProgrammingServices* gpuProgrammingServices = driver->getGPUProgrammingServices ();
+
+    int32_t materialType1 = 0;
+
+    if (gpuProgrammingServices)
+    {
+        MyShaderCallback* shader = new MyShaderCallback ();
+
+        BasicShaderLoader _vert(_waterripple_vert_shader, BasicShaderLoader::Type::Type_Vertex);
+        BasicShaderLoader _frag(_waterripple_frag_shader, BasicShaderLoader::Type::Type_Pixel);
+
+        materialType1 = gpuProgrammingServices->addHighLevelShaderMaterial(
+                _vert.precompile ()->c_str (), "vertexMain", irr::video::EVST_VS_2_0,
+                _frag.precompile ()->c_str (), "pixelMain", irr::video::EPST_PS_2_0,
+                shader, irr::video::EMT_TRANSPARENT_ALPHA_CHANNEL, 0, irr::video::EGSL_DEFAULT
+        );
+
+        shader->drop ();
+    }
+
+    // load some basic textures
+    irr::video::ITexture*	waterTexture = driver->getTexture (_water_example.c_str ());
+    irr::video::ITexture*	mudTexture = driver->getTexture (_mud_example.c_str ());
+    irr::video::ITexture*	backgroundExample = driver->getTexture (_background_example.c_str ());
+    irr::video::ITexture*	waterRippleNormalTexture = driver->getTexture (_waterripple_normal.c_str ());
+    irr::video::ITexture*	whiteTexture = driver->getTexture (_white.c_str ());
+
+    // get scene manager
+    irr::scene::ISceneManager* sceneManager = device->getSceneManager ();
+
+    sceneManager->addCameraSceneNode (0, irr::core::vector3df (0.0f, 0.0f, -_map_size.Z), irr::core::vector3df (0.0f, 0.0f, _map_size.Z));
+
+    QuadSceneNode* backgroundNode = new QuadSceneNode (sceneManager->getRootSceneNode (), sceneManager, 666);
+    QuadSceneNode* waterNode = new QuadSceneNode (sceneManager->getRootSceneNode (), sceneManager, 667);
+    QuadSceneNode* mudNode = new QuadSceneNode (sceneManager->getRootSceneNode (), sceneManager, 668);
+
+    backgroundNode->getMaterial (0).setTexture (0, backgroundExample);
+    backgroundNode->setMaterialType (irr::video::EMT_TRANSPARENT_ALPHA_CHANNEL);
+
+    mudNode->getMaterial (0).setTexture (0, mudTexture);
+    mudNode->setMaterialType (irr::video::EMT_TRANSPARENT_ALPHA_CHANNEL);
+
+    waterNode->setMaterialFlag(irr::video::EMF_LIGHTING, false);
+    waterNode->setMaterialFlag(irr::video::EMF_BLEND_OPERATION, true);
+
+    waterNode->getMaterial (0).setTexture (0, waterTexture);
+    waterNode->getMaterial (0).setTexture (1, waterRippleNormalTexture);
+    waterNode->getMaterial (0).setTexture (2, whiteTexture);
+    waterNode->setMaterialType ( (irr::video::E_MATERIAL_TYPE) materialType1);
+
+    irr::core::matrix4 identity; identity.makeIdentity ();
+    irr::core::matrix4 orthoProjection; orthoProjection.buildProjectionMatrixOrthoLH (1.0f, 1.0f, 0.0f, 1.0f);
+
+    driver->setTransform (irr::video::ETS_PROJECTION, orthoProjection);
+    driver->setTransform (irr::video::ETS_VIEW, identity);
+    driver->setTransform (irr::video::ETS_WORLD, identity);
+
+    int32_t lastTime = 0;
+    int32_t minimumTime = 1000 / 90;
+    int32_t currentTime = 0;
+
+    while (device->run () && driver)
+    {
+        // if (device->isWindowActive ())
+        {
+            currentTime = device->getTimer ()->getTime ();
+            g_Time = currentTime / 1000.0f;
+
+            if (currentTime - lastTime > minimumTime)
+            {
+                driver->beginScene (true, true, irr::video::SColor(0, 0, 0, 0));
+                sceneManager->drawAll ();
+                driver->endScene ();
+
+                lastTime = currentTime;
+            }
+            else
+            {
+                device->sleep (1, false);
+            }
+
+            // printf ("FPS: %d\n", driver->getFPS ());
+        }
+    }
+
+    return 0;
+}

nier_test.h

@@ -0,0 +1,12 @@
+//
+// Created by almamu on 4/07/18.
+//
+
+#ifndef WALLENGINE_NIER_TEST_H
+#define WALLENGINE_NIER_TEST_H
+
+extern irr::io::path _example_base_folder;
+
+int nier_test ();
+
+#endif //WALLENGINE_NIER_TEST_H

res/common.h

@@ -0,0 +1,40 @@
+#define M_PI 3.14159265359
+#define M_PI_HALF 1.57079632679
+#define M_PI_2 6.28318530718
+
+#define SQRT_2 1.41421356237
+#define SQRT_3 1.73205080756
+
+///////////////////////////////////////////
+// Color conversion
+///////////////////////////////////////////
+vec3 hsv2rgb(vec3 c)
+{
+    vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
+    vec3 p = abs(frac(c.xxx + K.xyz) * 6.0 - K.www);
+    return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+}
+
+vec3 rgb2hsv(vec3 RGB)
+{
+    vec4 P = (RGB.g < RGB.b) ? vec4(RGB.bg, -1.0, 2.0/3.0) : vec4(RGB.gb, 0.0, -1.0/3.0);
+    vec4 Q = (RGB.r < P.x) ? vec4(P.xyw, RGB.r) : vec4(RGB.r, P.yzx);
+    float C = Q.x - min(Q.w, Q.y);
+    float H = abs((Q.w - Q.y) / (6 * C + 1e-10) + Q.z);
+
+    vec3 HCV = vec3(H, C, Q.x);
+    float S = HCV.y / (HCV.z + 1e-10);
+    return vec3(HCV.x, S, HCV.z);
+}
+
+vec2 rotateVec2(vec2 v, float r)
+{
+    vec2 cs = vec2(cos(r), sin(r));
+    return vec2(v.x * cs.x - v.y * cs.y,
+                v.x * cs.y + v.y * cs.x);
+}
+
+float greyscale(vec3 color)
+{
+    return dot(color, vec3(0.11, 0.59, 0.3));
+}

res/shaders/effects/waterripple_opengl.frag

@@ -0,0 +1,39 @@
+
+// [COMBO_OFF] {"material":"ui_editor_properties_specular","combo":"SPECULAR","type":"options","default":0}
+
+varying vec4 v_TexCoord;
+varying vec2 v_Scroll;
+
+uniform sampler2D g_Texture0; // {"material":"ui_editor_properties_framebuffer","hidden":true}
+uniform sampler2D g_Texture1; // {"material":"ui_editor_properties_water_normal"}
+uniform sampler2D g_Texture2; // {"material":"ui_editor_properties_opacity_mask","mode":"opacitymask","default":"util/white"}
+
+uniform float g_Strength; // {"material":"ui_editor_properties_ripple_strength","default":0.1,"range":[0,1]}
+uniform float g_SpecularPower; // {"material":"ui_editor_properties_ripple_specular_power","default":1.0,"range":[0,100]}
+uniform float g_SpecularStrength; // {"material":"ui_editor_properties_ripple_specular_strength","default":1.0,"range":[0,10]}
+uniform vec3 g_SpecularColor; // {"material":"ui_editor_properties_ripple_specular_color","default":"1 1 1","type":"color"}
+
+varying vec4 v_TexCoordRipple;
+
+void main() {
+	vec2 texCoord = v_TexCoord.xy;
+	
+	float mask = texSample2D(g_Texture2, v_TexCoord.zw).r;
+	
+	vec3 n1 = texSample2D(g_Texture1, v_TexCoordRipple.xy).xyz * 2 - 1;
+	vec3 n2 = texSample2D(g_Texture1, v_TexCoordRipple.zw).xyz * 2 - 1;
+	vec3 normal = normalize(vec3(n1.xy + n2.xy, n1.z));
+	
+	texCoord.xy += normal.xy * g_Strength * g_Strength * mask;
+	
+	gl_FragColor = texSample2D(g_Texture0, texCoord);
+	
+#if SPECULAR == 1
+	vec2 direction = vec2(0.5, 0.0) - v_TexCoord.xy;
+	direction = normalize(direction);
+	float specular = max(0.0, dot(normal.xy, direction)) * max(0.0, dot(direction, vec2(0.0, -1.0)));
+	
+	specular = pow(specular, g_SpecularPower) * g_SpecularStrength;
+	gl_FragColor.rgb += specular * g_SpecularColor * gl_FragColor.a;
+#endif
+}

res/shaders/effects/waterripple_opengl.vert

@@ -0,0 +1,42 @@
+#include "common.h"
+
+uniform mat4 g_ModelViewProjectionMatrix;
+uniform float g_Time;
+uniform vec4 g_Texture0Resolution;
+uniform vec4 g_Texture2Resolution;
+
+uniform float g_AnimationSpeed; // {"material":"ui_editor_properties_animation_speed","default":0.15,"range":[0,0.5]}
+uniform float g_Scale; // {"material":"ui_editor_properties_ripple_scale","default":1,"range":[0,10]}
+uniform float g_ScrollSpeed; // {"material":"ui_editor_properties_scroll_speed","default":0,"range":[0,0.5]}
+uniform float g_Direction; // {"material":"ui_editor_properties_scroll_direction","default":0,"range":[0,6.28]}
+
+// attribute vec3 a_Position; // replaced by gl_Vertex
+// attribute vec2 a_TexCoord; // replaced by gl_MultiTexCoord0
+
+varying vec4 v_TexCoord;
+varying vec4 v_TexCoordRipple;
+
+void main() {
+	// gl_Position = mul(vec4(a_Position, 1.0), g_ModelViewProjectionMatrix);
+	gl_Position = g_ModelViewProjectionMatrix * gl_Vertex;
+	v_TexCoord.xy = gl_MultiTexCoord0.xy;
+	// v_TexCoord.xy = a_TexCoord;
+	
+	float piFrac = 0.78539816339744830961566084581988 * 0.5;
+	float pi = 3.141;
+	
+	vec2 coordsRotated = v_TexCoord.xy;
+	vec2 coordsRotated2 = v_TexCoord.xy * 1.333;
+	
+	vec2 scroll = rotateVec2(vec2(0, -1), g_Direction) * g_ScrollSpeed * g_ScrollSpeed * g_Time;
+	
+	v_TexCoordRipple.xy = coordsRotated + g_Time * g_AnimationSpeed * g_AnimationSpeed + scroll;
+	v_TexCoordRipple.zw = coordsRotated2 - g_Time * g_AnimationSpeed * g_AnimationSpeed + scroll;
+	v_TexCoordRipple *= g_Scale;
+
+	float rippleTextureAdjustment = (g_Texture0Resolution.x / g_Texture0Resolution.y);
+	v_TexCoordRipple.xz *= rippleTextureAdjustment;
+	
+	v_TexCoord.zw = vec2(v_TexCoord.x * g_Texture2Resolution.z / g_Texture2Resolution.x,
+						v_TexCoord.y * g_Texture2Resolution.w / g_Texture2Resolution.y);
+}