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0026892: Visualization, TKOpenGl - support 3D textures within OpenGl_Texture
Add a new arbTexFloat extension in OpenGl_Context. Add a new prototype glTexImage in OpenGl_GlFunctions. Push error message if glTexImage3D is unavailable.
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bugmaster
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@ -105,6 +105,7 @@ OpenGl_Context::OpenGl_Context (const Handle(OpenGl_Caps)& theCaps)
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#endif
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arbNPTW (Standard_False),
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arbTexRG (Standard_False),
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arbTexFloat (Standard_False),
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arbTexBindless (NULL),
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arbTBO (NULL),
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arbTboRGB32 (Standard_False),
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@ -1138,12 +1139,17 @@ void OpenGl_Context::init (const Standard_Boolean theIsCoreProfile)
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{
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hasHighp = Standard_True;
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}
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arbTexFloat = IsGlGreaterEqual (3, 0)
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&& FindProc ("glTexImage3D", myFuncs->glTexImage3D);
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#else
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myTexClamp = IsGlGreaterEqual (1, 2) ? GL_CLAMP_TO_EDGE : GL_CLAMP;
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hasTexRGBA8 = Standard_True;
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arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
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arbTexFloat = IsGlGreaterEqual (3, 0)
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|| CheckExtension ("GL_ARB_texture_float");
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extBgra = CheckExtension ("GL_EXT_bgra");
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extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
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extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
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@ -635,6 +635,7 @@ public: //! @name extensions
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Standard_Boolean hasTexRGBA8; //!< always available on desktop; on OpenGL ES - since 3.0 or as extension GL_OES_rgb8_rgba8
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Standard_Boolean arbNPTW; //!< GL_ARB_texture_non_power_of_two
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Standard_Boolean arbTexRG; //!< GL_ARB_texture_rg
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Standard_Boolean arbTexFloat; //!< GL_ARB_texture_float (on desktop OpenGL - since 3.0 or as extension GL_ARB_texture_float; on OpenGL ES - since 3.0)
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OpenGl_ArbTexBindless* arbTexBindless; //!< GL_ARB_bindless_texture
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OpenGl_ArbTBO* arbTBO; //!< GL_ARB_texture_buffer_object
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Standard_Boolean arbTboRGB32; //!< GL_ARB_texture_buffer_object_rgb32 (3-component TBO), in core since 4.0
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@ -117,6 +117,9 @@
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#define GL_READ_FRAMEBUFFER 0x8CA8
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#define GL_DRAW_FRAMEBUFFER 0x8CA9
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#define GL_TEXTURE_3D 0x806F
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#define GL_TEXTURE_WRAP_R 0x8072
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// GL_EXT_texture_filter_anisotropic
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#define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE
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#define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF
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@ -712,6 +715,9 @@ public: //! @name OpenGL ES 3.0
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typedef void (*glBlitFramebuffer_t)(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1, GLbitfield mask, GLenum filter);
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glBlitFramebuffer_t glBlitFramebuffer;
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typedef void (*glTexImage3D_t)(GLenum target, GLint level, GLint internalFormat, GLsizei width, GLsizei height, GLsizei depth, GLint border, GLenum format, GLenum type, const GLvoid* data);
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glTexImage3D_t glTexImage3D;
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public: //! @name OpenGL ES 3.1
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typedef void (*glTexStorage2DMultisample_t)(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, GLboolean fixedsamplelocations);
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@ -55,6 +55,7 @@ OpenGl_Texture::OpenGl_Texture (const Handle(Graphic3d_TextureParams)& theParams
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myTarget (GL_TEXTURE_2D),
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mySizeX (0),
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mySizeY (0),
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mySizeZ (0),
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myTextFormat (GL_RGBA),
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myHasMipmaps (Standard_False),
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myIsAlpha (false),
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@ -379,6 +380,7 @@ bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx,
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#else
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// ES does not support sized formats and format conversions - them detected from data type
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const GLint anIntFormat = thePixelFormat;
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(void) theTextFormat;
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#endif
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const GLsizei aWidth = theSizeX;
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const GLsizei aHeight = theSizeY;
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@ -794,3 +796,123 @@ bool OpenGl_Texture::InitRectangle (const Handle(OpenGl_Context)& theCtx,
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return false;
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#endif
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}
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// =======================================================================
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// function : Init3D
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// purpose :
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// =======================================================================
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bool OpenGl_Texture::Init3D (const Handle(OpenGl_Context)& theCtx,
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const GLint theTextFormat,
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const GLenum thePixelFormat,
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const GLenum theDataType,
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const Standard_Integer theSizeX,
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const Standard_Integer theSizeY,
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const Standard_Integer theSizeZ,
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const void* thePixels)
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{
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if (theCtx->Functions()->glTexImage3D == NULL)
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{
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TCollection_ExtendedString aMsg ("Error: three-dimensional textures are not supported by hardware.");
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theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION,
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GL_DEBUG_TYPE_ERROR,
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0,
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GL_DEBUG_SEVERITY_HIGH,
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aMsg);
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return false;
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}
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if (!Create(theCtx))
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{
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return false;
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}
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myTarget = GL_TEXTURE_3D;
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const GLsizei aSizeX = Min (theCtx->MaxTextureSize(), theSizeX);
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const GLsizei aSizeY = Min (theCtx->MaxTextureSize(), theSizeY);
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const GLsizei aSizeZ = Min (theCtx->MaxTextureSize(), theSizeZ);
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Bind (theCtx);
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if (theDataType == GL_FLOAT && !theCtx->arbTexFloat)
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{
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TCollection_ExtendedString aMsg ("Error: floating-point textures are not supported by hardware.");
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theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION,
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GL_DEBUG_TYPE_ERROR,
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0,
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GL_DEBUG_SEVERITY_HIGH,
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aMsg);
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Release (theCtx.operator->());
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Unbind (theCtx);
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return false;
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}
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const GLint anIntFormat = theTextFormat;
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#if !defined (GL_ES_VERSION_2_0)
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theCtx->core15fwd->glTexImage3D (GL_PROXY_TEXTURE_3D,
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0,
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anIntFormat,
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aSizeX,
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aSizeY,
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aSizeZ,
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0,
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thePixelFormat,
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theDataType,
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NULL);
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GLint aTestSizeX = 0;
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GLint aTestSizeY = 0;
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GLint aTestSizeZ = 0;
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glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_WIDTH, &aTestSizeX);
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glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_HEIGHT, &aTestSizeY);
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glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_DEPTH, &aTestSizeZ);
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if (aTestSizeX == 0 || aTestSizeY == 0 || aTestSizeZ == 0)
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{
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Unbind (theCtx);
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Release (theCtx.operator->());
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return false;
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}
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#endif
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const GLenum aWrapMode = myParams->IsRepeat() ? GL_REPEAT : theCtx->TextureWrapClamp();
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const GLenum aFilter = (myParams->Filter() == Graphic3d_TOTF_NEAREST) ? GL_NEAREST : GL_LINEAR;
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glTexParameteri (myTarget, GL_TEXTURE_WRAP_S, aWrapMode);
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glTexParameteri (myTarget, GL_TEXTURE_WRAP_T, aWrapMode);
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glTexParameteri (myTarget, GL_TEXTURE_WRAP_R, aWrapMode);
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glTexParameteri (myTarget, GL_TEXTURE_MIN_FILTER, aFilter);
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glTexParameteri (myTarget, GL_TEXTURE_MAG_FILTER, aFilter);
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theCtx->Functions()->glTexImage3D (myTarget,
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0,
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anIntFormat,
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aSizeX,
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aSizeY,
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aSizeZ,
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0,
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thePixelFormat,
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theDataType,
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thePixels);
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if (glGetError() != GL_NO_ERROR)
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{
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Unbind (theCtx);
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Release (theCtx.operator->());
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return false;
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}
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mySizeX = aSizeX;
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mySizeY = aSizeY;
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mySizeZ = aSizeZ;
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Unbind (theCtx);
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return true;
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}
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@ -394,6 +394,16 @@ public:
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const Standard_Integer theSizeY,
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const OpenGl_TextureFormat& theFormat);
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//! Initializes 3D texture rectangle with specified format and size.
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Standard_EXPORT bool Init3D (const Handle(OpenGl_Context)& theCtx,
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const GLint theTextFormat,
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const GLenum thePixelFormat,
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const GLenum theDataType,
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const Standard_Integer theSizeX,
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const Standard_Integer theSizeY,
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const Standard_Integer theSizeZ,
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const void* thePixels);
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//! @return true if texture was generated within mipmaps
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Standard_EXPORT Standard_Boolean HasMipmaps() const;
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@ -413,9 +423,10 @@ public:
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protected:
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GLuint myTextureId; //!< GL resource ID
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GLenum myTarget; //!< GL_TEXTURE_1D/GL_TEXTURE_2D
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GLenum myTarget; //!< GL_TEXTURE_1D/GL_TEXTURE_2D/GL_TEXTURE_3D
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GLsizei mySizeX; //!< texture width
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GLsizei mySizeY; //!< texture height
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GLsizei mySizeZ; //!< texture depth
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GLenum myTextFormat; //!< texture format - GL_RGB, GL_RGBA,...
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Standard_Boolean myHasMipmaps; //!< flag indicates that texture was uploaded with mipmaps
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bool myIsAlpha; //!< indicates alpha format
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