Merge branch 'master' of...

Merge branch 'master' of ssh://Renault.informatik.rwth-aachen.de/data/git-repository/acgl/libraries/acgl

include/ACGL/HardwareSupport/RiftSdk.hh

+#pragma once
+
+/**
+ * IMPORTANT: DON'T EXPECT THIS CLASS TO HAVE A FINAL AND STABLE API!
+ *
+ * This class needs the LibOVR version 0.3.2 or higher to work.
+ * Headers of this lib need to be placed in the search path.
+ *
+ * In addition ACGL_USE_OCULUS_RIFT has to be defined.
+ *
+ *
+ */
+#ifdef ACGL_USE_OCULUS_RIFT
+
+#include <ACGL/ACGL.hh>
+#include <glm/glm.hpp>
+#include <OVR_CAPI.h>
+
+#if ACGL_RIFT_SDK_VERSION >= 32
+
+namespace ACGL{
+namespace HardwareSupport{
+
+
+	bool initRiftSDK();
+	void shutdownRiftSDK();
+
+	// create a standard Rift, can be replaced with own, more specialized code:
+	ovrHmd createRift(bool _headTrackingIsRequired = false, bool _headTranslationTrackingIsAllowed = true);
+	void destroyRift(ovrHmd _hmd);
+
+	// SDK gives different sizes per eye, return the max to make things easier:
+	glm::uvec2 getOptimalRenderSizePerEye(ovrHmd _hmd);
+
+}
+}
+
+#endif // RIFT_VERSION
+#endif // ACGL_USE_OCULUS_RIFT

include/ACGL/HardwareSupport/SimpleRiftController.hh

@@ -13,6 +13,7 @@
 
 #include <ACGL/ACGL.hh>
 #ifdef ACGL_USE_OCULUS_RIFT
+#if ACGL_RIFT_SDK_VERSION < 32
 
 #include <ACGL/Math/Math.hh>
 #include <glm/gtc/quaternion.hpp>
@@ -220,4 +221,5 @@ ACGL_SMARTPOINTER_TYPEDEFS(SimpleRiftController)
 }
 }
 
-#endif // ACGL_USE_OCULUS_RIFT
+#endif // RIFT_VERSION
+#endif // ACGL_USE_OCULUS_RIFT
\ No newline at end of file

include/ACGL/OpenGL/Data/ColorSpace.hh

@@ -13,11 +13,11 @@
 namespace ACGL{
 namespace OpenGL{
 
-enum ColorSpace
+enum class ColorSpace
 {
-    COLOR_SPACE_AUTO_DETECT,
-    COLOR_SPACE_LINEAR,
-    COLOR_SPACE_SRGB
+    AUTO_DETECT,
+    LINEAR,
+    SRGB
 };
 
 //! Recommends an OpenGL internal format for a given pair of format and color spaces

include/ACGL/OpenGL/Data/TextureData.hh

@@ -37,7 +37,7 @@ public:
         mFormat(GL_RGBA),
         mType(GL_UNSIGNED_BYTE),
         mPaddingBytesPerRow(0),
-        mColorSpace(COLOR_SPACE_AUTO_DETECT)
+        mColorSpace(ColorSpace::AUTO_DETECT)
     {}
     virtual ~TextureData(void)
     {
@@ -143,6 +143,11 @@ private:
 
 ACGL_SMARTPOINTER_TYPEDEFS(TextureData)
 
+//! Converts the texture data in _from to the target format and type given in
+//! _to. Overwrites width, height, and depth in _to. Old texture data is removed
+//! and new memory is allocated.
+void convertTextureData(const SharedTextureData& _from, const SharedTextureData& _to);
+
 } // OpenGL
 } // ACGL
 

include/ACGL/OpenGL/Data/TextureDataLoadStore.hh

@@ -38,7 +38,7 @@ void registerTextureLoadFunction(std::vector<std::string> _endings, TextureLoadF
 void unregisterTextureLoadFunction(TextureLoadFuncPtr _function);
 
 //! generic load function that will use one of the loading functions below based on the file ending
-SharedTextureData loadTextureData(const std::string &_filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
+SharedTextureData loadTextureData(const std::string &_filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
 
 //! generic save function that will use one of the saving functions below based on the file ending
 bool saveTextureData(const SharedTextureData &_textureData, const std::string &_filename);
@@ -59,21 +59,21 @@ inline bool saveScreenshotWithDate( const std::string& _fileEnding = "png" ) {
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 //! loads from a PNG using the simple lodepng library
-SharedTextureData loadTextureDataFromLodepng(const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
+SharedTextureData loadTextureDataFromLodepng(const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
 
 #ifdef ACGL_COMPILE_WITH_QT
 //! loads various formats from the QT library
-SharedTextureData loadTextureDataFromQT(const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
+SharedTextureData loadTextureDataFromQT(const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
 #endif
 
 //! loads RGBE aka Radiance files
-SharedTextureData loadTextureDataFromRGBE(const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
+SharedTextureData loadTextureDataFromRGBE(const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
 
 //! loads EXR / OpenEXR files iff the library is present AT RUNTIME (linux only)
-SharedTextureData loadTextureDataFromEXR(const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
+SharedTextureData loadTextureDataFromEXR(const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
 
 //! loads PNM / PPM files:
-SharedTextureData loadTextureDataFromPNM(const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
+SharedTextureData loadTextureDataFromPNM(const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 //                                                                           library specific save

include/ACGL/OpenGL/Data/TextureLoadStore.hh

@@ -21,13 +21,13 @@ namespace ACGL{
 namespace OpenGL{
 
 //! loads the texture and creates mip maps
-SharedTexture2D loadTexture2D(const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
+SharedTexture2D loadTexture2D(const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
 
 //! loads the texture including mipmaps from a DDS file
 //! supports DXT1, DXT3 and DXT5 compression
-SharedTexture2D      loadTexture2DFromDDS     (const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
-SharedTexture3D      loadTexture3DFromDDS     (const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
-SharedTextureCubeMap loadTextureCubeMapFromDDS(const std::string& _filename, ColorSpace _colorSpace = COLOR_SPACE_AUTO_DETECT);
+SharedTexture2D      loadTexture2DFromDDS     (const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
+SharedTexture3D      loadTexture3DFromDDS     (const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
+SharedTextureCubeMap loadTextureCubeMapFromDDS(const std::string& _filename, ColorSpace _colorSpace = ColorSpace::AUTO_DETECT);
 
 }
 }

include/ACGL/OpenGL/Objects/ShaderProgram.hh

@@ -119,7 +119,13 @@ public:
     // ===================================================================================================== \/
 public:
     //////////// uniform (block) locations:
-    inline GLint getUniformLocation    (const std::string& _nameInShader) const { return glGetUniformLocation (mObjectName, _nameInShader.c_str()); }
+	inline GLint getUniformLocation(const std::string& _nameInShader) const 
+	{
+		// Cache uniform location
+		if ( !mUniformLocationCache.count(_nameInShader) ) 
+			mUniformLocationCache[_nameInShader] = glGetUniformLocation(mObjectName, _nameInShader.c_str()); 
+		return mUniformLocationCache[_nameInShader];
+	}
 
 #if (ACGL_OPENGL_VERSION >= 31)
     //! if the block name does not exist, GL_INVALID_INDEX will get returned
@@ -363,6 +369,9 @@ public:
 protected:
     GLuint               mObjectName;
     ConstSharedShaderVec mShaders;
+
+	/// Cache for uniform locations
+	mutable std::map<std::string, int> mUniformLocationCache;
 };
 
 ACGL_SMARTPOINTER_TYPEDEFS(ShaderProgram)

include/ACGL/Scene/OculusRiftCamera.hh

+/***********************************************************************
+ * Copyright 2011-2013 Computer Graphics Group RWTH Aachen University. *
+ * All rights reserved.                                                *
+ * Distributed under the terms of the MIT License (see LICENSE.TXT).   *
+ **********************************************************************/
+#pragma once
+
+/**
+ * The RiftCamera is controlled completely by the Oculus Rift. Some members are
+ * compatible with a GenericCamera but only in the getters as all internal state is
+ * defined by a connected Rift.
+ *
+ * The center of the coordinate system is roughly in the users head.
+ *
+ * This cameras View-Matrix gives the translation/rotation from the center inside the
+ * users body to the requested eye.
+ *
+ */
+#ifdef ACGL_USE_OCULUS_RIFT
+
+#include <ACGL/ACGL.hh>
+#include <ACGL/Scene/GenericCamera.hh>
+
+#include <OVR_CAPI.h>
+
+namespace ACGL{
+namespace Scene {
+
+class OculusRiftCamera : public GenericCamera {
+public:
+	struct OvrEye
+	{
+		ovrEyeType  Eye;
+		ovrFovPort  Fov;
+		ovrSizei         TextureSize;
+		ovrRecti         RenderViewport;
+	};
+
+    void connectWithRift(ovrHmd _hmd);
+    virtual glm::vec3 getPosition() const override;
+	virtual glm::mat4 getViewMatrix() const override;
+	virtual glm::mat4 getProjectionMatrix() const override;
+	virtual glm::uvec2 getViewportSize() const override;
+
+    // Will update the pose based on the Rift tracking
+    // and define the correct eye
+    // _eyeNumber can be 0 or 1, it is undefined which is the
+    // left eye and which is the right eye. The eye set will
+    // be returned. Call stopRenderingEye() afterwards!
+    // does also call ovrHmd_BeginEyeRender internally!
+    GenericCamera::Eye startRenderingEye(int _eyeNumber);
+    void stopRenderingEye(int _eyeNumber, ovrTexture* eyeTexture);
+
+	void updateFromRift();
+	const OvrEye *getOVREyeDescription() const { return mEyeDescription; }
+	
+private:
+	ovrHmd mHmd;
+	OvrEye mEyeDescription[2]; // left, right
+	
+	GenericCamera::Eye mEyeOrdering[2];
+	ovrPosef mPoseUsedForRendering[2];
+	int mActiveEye; // to index the two-element arrays
+};
+ACGL_SMARTPOINTER_TYPEDEFS(OculusRiftCamera)
+}
+}
+
+#endif // ACGL_USE_OCULUS_RIFT

src/ACGL/HardwareSupport/RiftSdk.cc

+#include <ACGL/HardwareSupport/RiftSdk.hh>
+#include <ACGL/OpenGL/Creator/ShaderProgramCreator.hh>
+
+#include <iostream>
+
+#include <ACGL/Utils/Log.hh>
+
+#ifdef ACGL_USE_OCULUS_RIFT
+#if ACGL_RIFT_SDK_VERSION >= 32
+
+namespace ACGL{
+namespace HardwareSupport{
+
+	using namespace std;
+	using namespace ACGL::Utils;
+
+	// C API helpers:
+
+	static bool ACGL_RiftSDKInitialized = false;
+
+	bool initRiftSDK()
+	{
+		if (ACGL_RiftSDKInitialized) return true; // don't init twice
+
+		ovrBool ok = ovr_Initialize();
+		if (!ok) {
+			error() << "could not initialize Oculus Rift library" << endl;
+		}
+		else {
+			ACGL_RiftSDKInitialized = true;
+		}
+		return ACGL_RiftSDKInitialized;
+	}
+
+	void shutdownRiftSDK()
+	{
+		ovr_Shutdown();
+	}
+
+	// For more sophisticated use cases build your own Rift for your needs based on the Rift SDK instead of using this default Rift.
+	//
+	// _headTrackingIsRequired           = if false, the call will create a dummy device that won't generate any data in case no real Rift is connected
+	//                                     (for developing without an actual device).
+	// _headTranslationTrackingIsAllowed = if true the Tracking of DK2 will get supported, if false even a DK2 will behave like a DK1
+	ovrHmd createRift(bool _headTrackingIsRequired, bool _headTranslationTrackingIsAllowed)
+	{
+		if (!ACGL_RiftSDKInitialized) {
+			error() << "Rift SDK not initialized correctly - did you call/check initRiftSDK()?" << endl;
+		}
+
+		ovrHmd mHmd = ovrHmd_Create(0);
+		if (!mHmd && _headTrackingIsRequired) {
+			error() << "could not connect to an Oculus Rift HMD" << endl;
+			return NULL;
+		}
+		else if (!mHmd && !_headTrackingIsRequired) {
+
+#if ACGL_RIFT_USE_DUMMY
+            warning() << "could not connect to a real Oculus Rift HMD - generating sensorless dummy" << endl;
+            mHmd = ovrHmd_CreateDebug(ovrHmd_DK1);
+#else
+            debug() << "could not connect to a real Oculus Rift HMD" << endl;
+            mHmd = NULL;
+#endif
+
+            return mHmd;
+		}
+
+		ovrHmdDesc mHmdDesc;
+		ovrHmd_GetDesc(mHmd, &mHmdDesc);
+
+		// debug output:
+		debug() << "Connected to: " << mHmdDesc.ProductName << endl;
+
+		// start the tracking:
+		// what the application supports:
+		unsigned int supportedCaps = ovrSensorCap_Orientation | ovrSensorCap_YawCorrection | ovrHmdCap_LowPersistence | ovrHmdCap_LatencyTest | ovrHmdCap_DynamicPrediction;
+		if (_headTranslationTrackingIsAllowed) supportedCaps |= ovrSensorCap_Position;
+
+		// what the device must deliver as a bare minimum:
+		unsigned int requiredCaps = 0;
+		if (_headTrackingIsRequired) requiredCaps |= ovrSensorCap_Orientation;
+		ovrBool ok = ovrHmd_StartSensor(mHmd, supportedCaps, requiredCaps);
+		if (!ok) {
+			error() << "could not get connected to a Rift tracker - only rendering is supported" << endl;
+		}
+
+		return mHmd;
+	}
+
+	void destroyRift(ovrHmd _hmd)
+	{
+		ovrHmd_Destroy(_hmd);
+	}
+
+
+	glm::uvec2 getOptimalRenderSizePerEye(ovrHmd _hmd)
+	{
+		if (_hmd == NULL) return glm::uvec2(640, 800);
+		ovrHmdDesc hmdDesc;
+		ovrHmd_GetDesc(_hmd, &hmdDesc);
+		ovrSizei optimalLeft = ovrHmd_GetFovTextureSize(_hmd, ovrEye_Left, hmdDesc.DefaultEyeFov[0], 1.0f);
+		ovrSizei optimalRight = ovrHmd_GetFovTextureSize(_hmd, ovrEye_Right, hmdDesc.DefaultEyeFov[1], 1.0f);
+
+		debug() << "optimalLeft  " << optimalLeft.w << " " << optimalLeft.h << endl;
+		debug() << "optimalRight " << optimalRight.w << " " << optimalRight.h << endl;
+
+		debug() << "hmd: " << hmdDesc.ProductName << endl;
+		debug() << "hmd WindowsPos: " << hmdDesc.WindowsPos.x << " " << hmdDesc.WindowsPos.y << endl;
+
+		return glm::uvec2(glm::max(optimalLeft.w, optimalRight.w), glm::max(optimalLeft.h, optimalRight.h));
+	}
+}
+}
+
+#endif
+#endif

src/ACGL/HardwareSupport/SimpleRiftController.cc

@@ -2,6 +2,7 @@
 #include <ACGL/OpenGL/Creator/ShaderProgramCreator.hh>
 
 #ifdef ACGL_USE_OCULUS_RIFT
+#if ACGL_RIFT_SDK_VERSION < 32
 
 using namespace OVR;
 using namespace ACGL;
@@ -736,3 +737,4 @@ void SimpleRiftController::renderDistortedP( ACGL::OpenGL::ConstSharedShaderProg
 }
 
 #endif
+#endif
\ No newline at end of file

src/ACGL/OpenGL/Data/ColorSpace.cc

@@ -46,7 +46,7 @@ GLenum recommendedInternalFormat(GLenum _format, ColorSpace _colorSpace)
 {
     switch(_colorSpace)
     {
-        case COLOR_SPACE_SRGB: return formatToSRGB(_format);
+        case ColorSpace::SRGB: return formatToSRGB(_format);
         default:               return _format;
     }
 }

src/ACGL/OpenGL/Data/GeometryDataLoadStoreOBJ.cc

@@ -65,22 +65,34 @@ namespace
         return r;
     }
 
-    // Parses a string of space-separated numbers into a packed floating-point vector (_data) with a maximum number of _maxDimension elements
-    void parseVector(const char* _start , const char* _end, int _maxDimension, int& _dimension, float* _data)
+    void trim(const char*& _position)
     {
-        const char* it = _start;
-        if (*it == ' ')
+        while(*_position == ' ' || *_position == '\t')
+            _position ++;
+    }
+
+    const char * nextObject(const char* _position, const char* _end)
+    {
+        while(_position < _end)
         {
-            it++;
+            if(*_position == ' ' || *_position == '\t')
+                return _position;
+            ++_position;
         }
-        const char* end = _end;
+        return _position;
+    }
+
+    // Parses a string of space-separated numbers into a packed floating-point vector (_data) with a maximum number of _maxDimension elements
+    void parseVector(const char* _it , const char* _end, int _maxDimension, int& _dimension, float* _data)
+    {
         const char* found;
         _dimension = 0;
-        while (_dimension < _maxDimension && it < end)
+        while (_dimension < _maxDimension && _it < _end)
         {
-            found = std::find(it, end, ' ');
-            _data[_dimension++] = fastAtof(it,found-1);
-            it = found == end ? end : found + 1;
+            trim(_it);
+            found = nextObject(_it,_end);
+            _data[_dimension++] = fastAtof(_it,found-1);
+            _it = found == _end ? _end : found + 1;
         }
     }
 
@@ -92,8 +104,7 @@ namespace
         indices.reserve(5);
 
         const char* it = _start;
-        if (*it == ' ') //skip starting whitespace
-            it++;
+        trim(it);
         const char* vsit;
         const char* vsend;
         const char* foundSlash;
@@ -102,12 +113,13 @@ namespace
         while (it < _end)
         {
             vsit = it;
-            vsend = std::find(it, _end, ' ');
+            vsend = nextObject(it, _end);
             componentIndex = 0;
             IndexTuple indexTuple;
             //process the string now meaning we split by /
             while (vsit < vsend)
             {
+                trim(vsit);
                 foundSlash = std::find(vsit, vsend, '/');
                 index = std::atoi(vsit);
                 if (componentIndex == 0) indexTuple.position = index - 1;
@@ -117,7 +129,8 @@ namespace
                 vsit = foundSlash == vsend ? vsend : foundSlash + 1;
             }
             indices.push_back(indexTuple);
-            it = vsend == _end ? _end : vsend + 1;
+            trim(vsend);
+            it = vsend;
         }
         return indices;
     }
@@ -160,21 +173,23 @@ SharedGeometryData loadGeometryDataFromOBJ(const std::string& _filename, bool _c
     const char* parameters[2];
     while (pchBuf < pchEnd)
     {
+        trim(pchBuf);
         // Parse the current line
         const char* pchEOL = std::find(pchBuf, pchEnd, '\n');
 
-        // If the line starts with a #, it is a comment
-        if (*pchBuf == '#')
+        // skip empty lines or lines starting with #
+        if (*pchBuf == '#' || pchBuf == pchEOL)
         {
             pchBuf = pchEOL + 1;
             continue;
         }
 
         // Otherwise, extract the first word and the remainder
-        const char* pchKey = std::find(pchBuf, pchEnd, ' ');
+        const char* pchKey = nextObject(pchBuf, pchEnd);
         keyword = pchBuf;
-        keywordLength = pchKey - pchBuf;//std::string(pchBuf, pchKey);
-        parameters[0] = pchKey + 1;
+        keywordLength = pchKey - pchBuf;
+        trim(pchKey);
+        parameters[0] = pchKey;
         parameters[1] = pchEOL;
 
         if(strncmp(keyword,"v",keywordLength) == 0) // vertex position
@@ -400,6 +415,7 @@ SharedGeometryData loadGeometryDataFromOBJ(const std::string& _filename, bool _c
     data->setStrideSize(strideSize);
     data->setSize(abDataElements * sizeof(GLfloat));
     data->setData((GLubyte*)abData);
+
     return data;
 }
 

src/ACGL/OpenGL/Data/TextureData.cc

@@ -7,8 +7,8 @@
 #include <ACGL/OpenGL/Data/TextureData.hh>
 #include <ACGL/Utils/Memory.hh>
 
-using namespace ACGL;
-using namespace ACGL::OpenGL;
+namespace ACGL {
+namespace OpenGL {
 
 GLsizei  TextureData::getPackAlignment() const
 {
@@ -304,3 +304,74 @@ void TextureData::setTexel( glm::uvec2 _texCoord, glm::vec4 _color )
     }
 }
 
+float grayscaleMixdown(float _r, float _g, float _b)
+{
+    return 0.299f * _r + 0.587f * _g + 0.114f * _b;
+}
+
+glm::vec4 convertTexelNumChannels(glm::vec4 _texel, GLsizei _from, GLsizei _to)
+{
+    if (_from == _to) {
+        return _texel;
+    }
+    else if (_from == 1) {
+        switch (_to) {
+            case 2: return {_texel.r, 1.0, 0.0, 0.0};
+            case 3: return {_texel.r, _texel.r, _texel.r, 0.0};
+            case 4: return {_texel.r, _texel.r, _texel.r, 1.0};
+        }
+    }
+    else if (_from == 2) {
+        switch (_to) {
+            case 1: return {_texel.r, 0.0, 0.0, 0.0};
+            case 3: return {_texel.r, _texel.r, _texel.r, _texel.g};
+            case 4: return {_texel.r, _texel.r, _texel.r, _texel.g};
+        }
+    }
+    else if (_from == 3) {
+        switch (_to) {
+            case 1: return {grayscaleMixdown(_texel.r, _texel.g, _texel.b), 0.0, 0.0, 0.0};
+            case 2: return {grayscaleMixdown(_texel.r, _texel.g, _texel.b), 1.0, 0.0, 0.0};
+            case 4: return {_texel.r, _texel.r, _texel.r, 1.0};
+        }
+    }
+    else if (_from == 4) {
+        switch (_to) {
+            case 1: return {grayscaleMixdown(_texel.r, _texel.g, _texel.b), 0.0, 0.0, 0.0};
+            case 2: return {grayscaleMixdown(_texel.r, _texel.g, _texel.b), 1.0, 0.0, 0.0};
+            case 3: return {_texel.r, _texel.r, _texel.r, 0.0};
+        }
+    }
+    return _texel;
+}
+
+void convertTextureData(const SharedTextureData& _from, const SharedTextureData& _to)
+{
+    assert(_from);
+    assert(_to);
+    if (!_from->getData()) {
+        ACGL::Utils::error() << "Cannot convert TextureData: source TextureData contains no data" << std::endl;
+        return;
+    }
+
+    // Setup target texture dimensions
+    _to->setWidth(_from->getWidth());
+    _to->setHeight(_from->getHeight());
+    _to->setDepth(_from->getDepth());
+
+    // Allocate new memory
+    _to->deleteData();
+    GLubyte* data = new GLubyte[_to->getSizeInBytes()];
+    _to->setData(data);
+
+    // Transfer pixels
+    for (GLsizei y = 0; y < _to->getHeight(); ++y) {
+        for (GLsizei x = 0; x < _to->getWidth(); ++x) {
+            auto texel = convertTexelNumChannels(_from->getTexel({x, y}), _from->getNumberOfChannels(), _to->getNumberOfChannels());
+            _to->setTexel({x, y}, texel);
+        }
+    }
+}
+
+} // namespace OpenGL
+} // namespace ACGL

src/ACGL/OpenGL/Data/TextureLoadStoreDDS.cc

@@ -18,7 +18,7 @@ using namespace nv_dds;
 
 namespace {