// Created by: Kirill GAVRILOV
-// Copyright (c) 2014 OPEN CASCADE SAS
+// Copyright (c) 2013-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
-// This library is free software; you can redistribute it and / or modify it
-// under the terms of the GNU Lesser General Public version 2.1 as published
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
#include <OpenGl_Texture.hxx>
-#include <OpenGl_ExtFBO.hxx>
+#include <OpenGl_ArbFBO.hxx>
#include <OpenGl_Context.hxx>
+#include <OpenGl_GlCore32.hxx>
+#include <OpenGl_Sampler.hxx>
#include <Graphic3d_TextureParams.hxx>
+#include <TCollection_ExtendedString.hxx>
#include <Standard_Assert.hxx>
#include <Image_PixMap.hxx>
-IMPLEMENT_STANDARD_HANDLE (OpenGl_Texture, OpenGl_Resource)
-IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Texture, OpenGl_Resource)
+IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Texture, OpenGl_NamedResource)
//! Simple class to reset unpack alignment settings
struct OpenGl_UnpackAlignmentSentry
{
//! Reset unpack alignment settings to safe values
- void Reset()
+ static void Reset()
{
glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
+ #if !defined(GL_ES_VERSION_2_0)
glPixelStorei (GL_UNPACK_ROW_LENGTH, 0);
+ #endif
}
+ OpenGl_UnpackAlignmentSentry() {}
+
~OpenGl_UnpackAlignmentSentry()
{
Reset();
// function : OpenGl_Texture
// purpose :
// =======================================================================
-OpenGl_Texture::OpenGl_Texture (const Handle(Graphic3d_TextureParams)& theParams)
-: OpenGl_Resource(),
+OpenGl_Texture::OpenGl_Texture (const TCollection_AsciiString& theResourceId,
+ const Handle(Graphic3d_TextureParams)& theParams)
+: OpenGl_NamedResource (theResourceId),
+ mySampler (new OpenGl_Sampler (theParams)),
+ myRevision (0),
myTextureId (NO_TEXTURE),
myTarget (GL_TEXTURE_2D),
mySizeX (0),
mySizeY (0),
- myTextFormat (GL_FLOAT),
+ mySizeZ (0),
+ myTextFormat (GL_RGBA),
+ mySizedFormat(GL_RGBA8),
+ myNbSamples (1),
myHasMipmaps (Standard_False),
- myParams (theParams)
+ myIsAlpha (false)
{
- if (myParams.IsNull())
- {
- myParams = new Graphic3d_TextureParams();
- }
+ //
}
// =======================================================================
Release (NULL);
}
-// =======================================================================
-// function : HasMipmaps
-// purpose :
-// =======================================================================
-const Standard_Boolean OpenGl_Texture::HasMipmaps() const
-{
- return myHasMipmaps;
-}
-
-// =======================================================================
-// function : GetParams
-// purpose :
-// =======================================================================
-const Handle(Graphic3d_TextureParams)& OpenGl_Texture::GetParams() const
-{
- return myParams;
-}
-
-// =======================================================================
-// function : SetParams
-// purpose :
-// =======================================================================
-void OpenGl_Texture::SetParams (const Handle(Graphic3d_TextureParams)& theParams)
-{
- myParams = theParams;
-}
-
// =======================================================================
// function : Create
// purpose :
// =======================================================================
-bool OpenGl_Texture::Create (const Handle(OpenGl_Context)& )
+bool OpenGl_Texture::Create (const Handle(OpenGl_Context)& theCtx)
{
+ if (myTextureId != NO_TEXTURE)
+ {
+ return true;
+ }
+
+ theCtx->core11fwd->glGenTextures (1, &myTextureId);
if (myTextureId == NO_TEXTURE)
{
- glGenTextures (1, &myTextureId);
+ return false;
}
- return myTextureId != NO_TEXTURE;
+
+ //mySampler->Create (theCtx); // do not create sampler object by default
+ return true;
}
// =======================================================================
// function : Release
// purpose :
// =======================================================================
-void OpenGl_Texture::Release (const OpenGl_Context* theGlCtx)
+void OpenGl_Texture::Release (OpenGl_Context* theGlCtx)
{
+ mySampler->Release (theGlCtx);
if (myTextureId == NO_TEXTURE)
{
return;
glDeleteTextures (1, &myTextureId);
}
myTextureId = NO_TEXTURE;
- mySizeX = mySizeY = 0;
+ mySizeX = mySizeY = mySizeZ = 0;
+}
+
+// =======================================================================
+// function : applyDefaultSamplerParams
+// purpose :
+// =======================================================================
+void OpenGl_Texture::applyDefaultSamplerParams (const Handle(OpenGl_Context)& theCtx)
+{
+ OpenGl_Sampler::applySamplerParams (theCtx, mySampler->Parameters(), NULL, myTarget, myHasMipmaps);
+ if (mySampler->IsValid() && !mySampler->IsImmutable())
+ {
+ OpenGl_Sampler::applySamplerParams (theCtx, mySampler->Parameters(), mySampler.get(), myTarget, myHasMipmaps);
+ }
}
// =======================================================================
// purpose :
// =======================================================================
void OpenGl_Texture::Bind (const Handle(OpenGl_Context)& theCtx,
- const GLenum theTextureUnit) const
+ const Graphic3d_TextureUnit theTextureUnit) const
{
- if (theCtx->IsGlGreaterEqual (1, 3))
+ if (theCtx->core15fwd != NULL)
{
- theCtx->core13->glActiveTexture (theTextureUnit);
+ theCtx->core15fwd->glActiveTexture (GL_TEXTURE0 + theTextureUnit);
}
+ mySampler->Bind (theCtx, theTextureUnit);
glBindTexture (myTarget, myTextureId);
}
// purpose :
// =======================================================================
void OpenGl_Texture::Unbind (const Handle(OpenGl_Context)& theCtx,
- const GLenum theTextureUnit) const
+ const Graphic3d_TextureUnit theTextureUnit) const
{
- if (theCtx->IsGlGreaterEqual (1, 3))
+ if (theCtx->core15fwd != NULL)
{
- theCtx->core13->glActiveTexture (theTextureUnit);
+ theCtx->core15fwd->glActiveTexture (GL_TEXTURE0 + theTextureUnit);
}
+ mySampler->Unbind (theCtx, theTextureUnit);
glBindTexture (myTarget, NO_TEXTURE);
}
-// =======================================================================
-// function : Init
-// purpose :
-// =======================================================================
-bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx,
- const Image_PixMap& theImage,
- const Graphic3d_TypeOfTexture theType)
+//=======================================================================
+//function : InitSamplerObject
+//purpose :
+//=======================================================================
+bool OpenGl_Texture::InitSamplerObject (const Handle(OpenGl_Context)& theCtx)
{
- myHasMipmaps = Standard_False;
- if (theImage.IsEmpty() || !Create (theCtx))
- {
- return false;
- }
+ return myTextureId != NO_TEXTURE
+ && mySampler->Init (theCtx, *this);
+}
- myTextFormat = GL_RGBA8;
- GLenum aPixelFormat = 0;
- GLenum aDataType = 0;
- switch (theImage.Format())
+//=======================================================================
+//function : GetDataFormat
+//purpose :
+//=======================================================================
+bool OpenGl_Texture::GetDataFormat (const Handle(OpenGl_Context)& theCtx,
+ const Image_PixMap& theData,
+ GLint& theTextFormat,
+ GLenum& thePixelFormat,
+ GLenum& theDataType)
+{
+ theTextFormat = GL_RGBA8;
+ thePixelFormat = 0;
+ theDataType = 0;
+ switch (theData.Format())
{
- case Image_PixMap::ImgGrayF:
+ case Image_Format_GrayF:
{
- myTextFormat = GL_ALPHA8; // GL_R8, GL_R32F
- aPixelFormat = GL_ALPHA; // GL_RED
- aDataType = GL_FLOAT;
- break;
+ if (theCtx->core11 == NULL)
+ {
+ theTextFormat = GL_R8; // GL_R32F
+ thePixelFormat = GL_RED;
+ }
+ else
+ {
+ #if !defined(GL_ES_VERSION_2_0)
+ theTextFormat = GL_LUMINANCE8;
+ #else
+ theTextFormat = GL_LUMINANCE;
+ #endif
+ thePixelFormat = GL_LUMINANCE;
+ }
+ theDataType = GL_FLOAT;
+ return true;
}
- case Image_PixMap::ImgRGBAF:
+ case Image_Format_AlphaF:
{
- myTextFormat = GL_RGBA8; // GL_RGBA32F
- aPixelFormat = GL_RGBA;
- aDataType = GL_FLOAT;
- break;
+ if (theCtx->core11 == NULL)
+ {
+ theTextFormat = GL_R8; // GL_R32F
+ thePixelFormat = GL_RED;
+ }
+ else
+ {
+ #if !defined(GL_ES_VERSION_2_0)
+ theTextFormat = GL_ALPHA8;
+ #else
+ theTextFormat = GL_ALPHA;
+ #endif
+ thePixelFormat = GL_ALPHA;
+ }
+ theDataType = GL_FLOAT;
+ return true;
+ }
+ case Image_Format_RGBAF:
+ {
+ theTextFormat = GL_RGBA8; // GL_RGBA32F
+ thePixelFormat = GL_RGBA;
+ theDataType = GL_FLOAT;
+ return true;
}
- case Image_PixMap::ImgBGRAF:
+ case Image_Format_BGRAF:
{
if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra)
{
return false;
}
- myTextFormat = GL_RGBA8; // GL_RGBA32F
- aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT
- aDataType = GL_FLOAT;
- break;
+ theTextFormat = GL_RGBA8; // GL_RGBA32F
+ thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA
+ theDataType = GL_FLOAT;
+ return true;
}
- case Image_PixMap::ImgRGBF:
+ case Image_Format_RGBF:
{
- myTextFormat = GL_RGB8; // GL_RGB32F
- aPixelFormat = GL_RGB;
- aDataType = GL_FLOAT;
- break;
+ theTextFormat = GL_RGB8; // GL_RGB32F
+ thePixelFormat = GL_RGB;
+ theDataType = GL_FLOAT;
+ return true;
}
- case Image_PixMap::ImgBGRF:
+ case Image_Format_BGRF:
{
- myTextFormat = GL_RGB8; // GL_RGB32F
- aPixelFormat = GL_BGR; // equals to GL_BGR_EXT
- aDataType = GL_FLOAT;
- break;
+ #if !defined(GL_ES_VERSION_2_0)
+ theTextFormat = GL_RGB8; // GL_RGB32F
+ thePixelFormat = GL_BGR; // equals to GL_BGR_EXT
+ theDataType = GL_FLOAT;
+ return true;
+ #else
+ return false;
+ #endif
}
- case Image_PixMap::ImgRGBA:
+ case Image_Format_RGBA:
{
- myTextFormat = GL_RGBA8;
- aPixelFormat = GL_RGBA;
- aDataType = GL_UNSIGNED_BYTE;
- break;
+ theTextFormat = GL_RGBA8;
+ thePixelFormat = GL_RGBA;
+ theDataType = GL_UNSIGNED_BYTE;
+ return true;
}
- case Image_PixMap::ImgBGRA:
+ case Image_Format_BGRA:
{
+ #if !defined(GL_ES_VERSION_2_0)
if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra)
{
return false;
}
- myTextFormat = GL_RGBA8;
- aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT
- aDataType = GL_UNSIGNED_BYTE;
- break;
+ theTextFormat = GL_RGBA8;
+ #else
+ if (!theCtx->extBgra)
+ {
+ return false;
+ }
+ theTextFormat = GL_BGRA_EXT;
+ #endif
+ thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA
+ theDataType = GL_UNSIGNED_BYTE;
+ return true;
}
- case Image_PixMap::ImgRGB32:
+ case Image_Format_RGB32:
{
- myTextFormat = GL_RGB8;
- aPixelFormat = GL_RGBA;
- aDataType = GL_UNSIGNED_BYTE;
- break;
+ #if !defined(GL_ES_VERSION_2_0)
+ // ask driver to convert data to RGB8 to save memory
+ theTextFormat = GL_RGB8;
+ #else
+ // conversion is not supported
+ theTextFormat = GL_RGBA8;
+ #endif
+ thePixelFormat = GL_RGBA;
+ theDataType = GL_UNSIGNED_BYTE;
+ return true;
}
- case Image_PixMap::ImgBGR32:
+ case Image_Format_BGR32:
{
- if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra)
+ #if !defined(GL_ES_VERSION_2_0)
+ if (!theCtx->IsGlGreaterEqual(1, 2) && !theCtx->extBgra)
+ {
+ return false;
+ }
+ theTextFormat = GL_RGB8;
+ #else
+ if (!theCtx->extBgra)
{
return false;
}
- myTextFormat = GL_RGB8;
- aPixelFormat = GL_BGRA; // equals to GL_BGRA_EXT
- aDataType = GL_UNSIGNED_BYTE;
- break;
+ theTextFormat = GL_BGRA_EXT;
+ #endif
+ thePixelFormat = GL_BGRA_EXT; // equals to GL_BGRA
+ theDataType = GL_UNSIGNED_BYTE;
+ return true;
}
- case Image_PixMap::ImgRGB:
+ case Image_Format_RGB:
{
- myTextFormat = GL_RGB8;
- aPixelFormat = GL_RGB;
- aDataType = GL_UNSIGNED_BYTE;
- break;
+ theTextFormat = GL_RGB8;
+ thePixelFormat = GL_RGB;
+ theDataType = GL_UNSIGNED_BYTE;
+ return true;
}
- case Image_PixMap::ImgBGR:
+ case Image_Format_BGR:
{
+ #if !defined(GL_ES_VERSION_2_0)
if (!theCtx->IsGlGreaterEqual (1, 2) && !theCtx->extBgra)
{
return false;
}
- myTextFormat = GL_RGB8;
- aPixelFormat = GL_BGR; // equals to GL_BGR_EXT
- aDataType = GL_UNSIGNED_BYTE;
- break;
+ theTextFormat = GL_RGB8;
+ thePixelFormat = GL_BGR; // equals to GL_BGR_EXT
+ theDataType = GL_UNSIGNED_BYTE;
+ return true;
+ #else
+ return false;
+ #endif
}
- case Image_PixMap::ImgGray:
+ case Image_Format_Gray:
{
- myTextFormat = GL_ALPHA8; // GL_R8
- aPixelFormat = GL_ALPHA; // GL_RED
- aDataType = GL_UNSIGNED_BYTE;
- break;
+ if (theCtx->core11 == NULL)
+ {
+ theTextFormat = GL_R8;
+ thePixelFormat = GL_RED;
+ }
+ else
+ {
+ #if !defined(GL_ES_VERSION_2_0)
+ theTextFormat = GL_LUMINANCE8;
+ #else
+ theTextFormat = GL_LUMINANCE;
+ #endif
+ thePixelFormat = GL_LUMINANCE;
+ }
+ theDataType = GL_UNSIGNED_BYTE;
+ return true;
}
- default:
+ case Image_Format_Alpha:
{
+ if (theCtx->core11 == NULL)
+ {
+ theTextFormat = GL_R8;
+ thePixelFormat = GL_RED;
+ }
+ else
+ {
+ #if !defined(GL_ES_VERSION_2_0)
+ theTextFormat = GL_ALPHA8;
+ #else
+ theTextFormat = GL_ALPHA;
+ #endif
+ thePixelFormat = GL_ALPHA;
+ }
+ theDataType = GL_UNSIGNED_BYTE;
+ return true;
+ }
+ case Image_Format_UNKNOWN:
+ {
+ return false;
+ }
+ }
+ return false;
+}
+
+// =======================================================================
+// function : Init
+// purpose :
+// =======================================================================
+bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx,
+ const Standard_Integer theTextFormat,
+ const GLenum thePixelFormat,
+ const GLenum theDataType,
+ const Standard_Integer theSizeX,
+ const Standard_Integer theSizeY,
+ const Graphic3d_TypeOfTexture theType,
+ const Image_PixMap* theImage)
+{
+ if (theSizeX < 1
+ || theSizeY < 1)
+ {
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
+ "Error: texture of 0 size cannot be created.");
+ Release (theCtx.operator->());
+ return false;
+ }
+
+#if !defined(GL_ES_VERSION_2_0)
+ const GLenum aTarget = theType == Graphic3d_TOT_1D
+ ? GL_TEXTURE_1D
+ : GL_TEXTURE_2D;
+#else
+ const GLenum aTarget = GL_TEXTURE_2D;
+#endif
+ const Standard_Boolean toCreateMipMaps = (theType == Graphic3d_TOT_2D_MIPMAP);
+ const bool toPatchExisting = IsValid()
+ && myTextFormat == thePixelFormat
+ && myTarget == aTarget
+ && myHasMipmaps == toCreateMipMaps
+ && mySizeX == theSizeX
+ && (mySizeY == theSizeY || theType == Graphic3d_TOT_1D);
+ if (!Create (theCtx))
+ {
+ Release (theCtx.operator->());
+ return false;
+ }
+
+ if (theImage != NULL)
+ {
+ myIsAlpha = theImage->Format() == Image_Format_Alpha
+ || theImage->Format() == Image_Format_AlphaF;
+ }
+ else
+ {
+ myIsAlpha = thePixelFormat == GL_ALPHA;
+ }
+
+ myHasMipmaps = toCreateMipMaps;
+ myTextFormat = thePixelFormat;
+ mySizedFormat = theTextFormat;
+ myNbSamples = 1;
+#if !defined(GL_ES_VERSION_2_0)
+ const GLint anIntFormat = theTextFormat;
+#else
+ // ES 2.0 does not support sized formats and format conversions - them detected from data type
+ const GLint anIntFormat = theCtx->IsGlGreaterEqual (3, 0) ? theTextFormat : thePixelFormat;
+#endif
+
+ if (theDataType == GL_FLOAT && !theCtx->arbTexFloat)
+ {
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
+ "Error: floating-point textures are not supported by hardware.");
+ Release (theCtx.operator->());
+ return false;
+ }
+
+ const GLsizei aMaxSize = theCtx->MaxTextureSize();
+ if (theSizeX > aMaxSize
+ || theSizeY > aMaxSize)
+ {
+ TCollection_ExtendedString aWarnMessage = TCollection_ExtendedString ("Error: Texture dimension - ")
+ + theSizeX + "x" + theSizeY + " exceeds hardware limits (" + aMaxSize + "x" + aMaxSize + ")";
+
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage);
+ Release (theCtx.operator->());
+ return false;
+ }
+#if !defined(GL_ES_VERSION_2_0)
+ else if (!theCtx->IsGlGreaterEqual (3, 0) && !theCtx->arbNPTW)
+ {
+ // Notice that formally general NPOT textures are required by OpenGL 2.0 specifications
+ // however some hardware (NV30 - GeForce FX, RadeOn 9xxx and Xxxx) supports GLSL but not NPOT!
+ // Trying to create NPOT textures on such hardware will not fail
+ // but driver will fall back into software rendering,
+ const GLsizei aWidthP2 = OpenGl_Context::GetPowerOfTwo (theSizeX, aMaxSize);
+ const GLsizei aHeightP2 = OpenGl_Context::GetPowerOfTwo (theSizeY, aMaxSize);
+
+ if (theSizeX != aWidthP2
+ || (theType != Graphic3d_TOT_1D && theSizeY != aHeightP2))
+ {
+ TCollection_ExtendedString aWarnMessage =
+ TCollection_ExtendedString ("Error: NPOT Textures (") + theSizeX + "x" + theSizeY + ") are not supported by hardware.";
+
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage);
+
+ Release (theCtx.operator->());
return false;
}
}
+#else
+ else if (!theCtx->IsGlGreaterEqual (3, 0) && theType == Graphic3d_TOT_2D_MIPMAP)
+ {
+ // Mipmap NPOT textures are not supported by OpenGL ES 2.0.
+ const GLsizei aWidthP2 = OpenGl_Context::GetPowerOfTwo (theSizeX, aMaxSize);
+ const GLsizei aHeightP2 = OpenGl_Context::GetPowerOfTwo (theSizeY, aMaxSize);
- const GLsizei aMaxSize = theCtx->MaxTextureSize();
- const GLsizei aWidth = (GLsizei )theImage.SizeX();
- const GLsizei aHeight = (GLsizei )theImage.SizeY();
+ if (theSizeX != aWidthP2
+ || theSizeY != aHeightP2)
+ {
+ TCollection_ExtendedString aWarnMessage =
+ TCollection_ExtendedString ("Error: Mipmap NPOT Textures (") + theSizeX + "x" + theSizeY + ") are not supported by OpenGL ES 2.0";
- // Notice that formally general NPOT textures are required by OpenGL 2.0 specifications
- // however some hardware (NV30 - GeForce FX, RadeOn 9xxx and Xxxx) supports GLSL but not NPOT!
- // Trying to create NPOT rextures on such hardware will not fail
- // but driver will fall back into software rendering,
- const bool toForceP2 = !theCtx->IsGlGreaterEqual (3, 0) && !theCtx->arbNPTW;
- const GLsizei aWidthOut = toForceP2 ? OpenGl_Context::GetPowerOfTwo (aWidth, aMaxSize) : Min (aWidth, aMaxSize);
- const GLsizei aHeightOut = toForceP2 ? OpenGl_Context::GetPowerOfTwo (aHeight, aMaxSize) : Min (aHeight, aMaxSize);
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage);
+ Release (theCtx.operator->());
+ return false;
+ }
+ }
+#endif
+
+#if !defined(GL_ES_VERSION_2_0)
GLint aTestWidth = 0;
GLint aTestHeight = 0;
+#endif
+ GLvoid* aDataPtr = (theImage != NULL) ? (GLvoid* )theImage->Data() : NULL;
// setup the alignment
OpenGl_UnpackAlignmentSentry anUnpackSentry;
- const GLint anAligment = Min ((GLint )theImage.MaxRowAligmentBytes(), 8); // OpenGL supports alignment upto 8 bytes
- glPixelStorei (GL_UNPACK_ALIGNMENT, anAligment);
+ (void)anUnpackSentry; // avoid compiler warning
- // notice that GL_UNPACK_ROW_LENGTH is not available on OpenGL ES 2.0 without GL_EXT_unpack_subimage extension
- const GLint anExtraBytes = GLint(theImage.RowExtraBytes());
- const GLint aPixelsWidth = GLint(theImage.SizeRowBytes() / theImage.SizePixelBytes());
- glPixelStorei (GL_UNPACK_ROW_LENGTH, (anExtraBytes >= anAligment) ? aPixelsWidth : 0);
+ if (aDataPtr != NULL)
+ {
+ const GLint anAligment = Min ((GLint )theImage->MaxRowAligmentBytes(), 8); // OpenGL supports alignment upto 8 bytes
+ glPixelStorei (GL_UNPACK_ALIGNMENT, anAligment);
+ #if !defined(GL_ES_VERSION_2_0)
+ // notice that GL_UNPACK_ROW_LENGTH is not available on OpenGL ES 2.0 without GL_EXT_unpack_subimage extension
+ const GLint anExtraBytes = GLint(theImage->RowExtraBytes());
+ const GLint aPixelsWidth = GLint(theImage->SizeRowBytes() / theImage->SizePixelBytes());
+ glPixelStorei (GL_UNPACK_ROW_LENGTH, (anExtraBytes >= anAligment) ? aPixelsWidth : 0);
+ #endif
+ }
+
+ myTarget = aTarget;
switch (theType)
{
case Graphic3d_TOT_1D:
{
- myTarget = GL_TEXTURE_1D;
+ #if !defined(GL_ES_VERSION_2_0)
Bind (theCtx);
- glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameteri (GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-
- Image_PixMap aCopy;
- GLvoid* aDataPtr = (GLvoid* )theImage.Data();
- if (aWidth != aWidthOut)
+ applyDefaultSamplerParams (theCtx);
+ if (toPatchExisting)
{
- glPixelStorei (GL_PACK_ALIGNMENT, 1);
- glPixelStorei (GL_PACK_ROW_LENGTH, 0);
- if (!aCopy.InitTrash (theImage.Format(), Standard_Size(aWidthOut), 1)
- || gluScaleImage (aPixelFormat,
- aWidth, 1, aDataType, theImage.Data(),
- aWidthOut, 1, aDataType, aCopy.ChangeData()) != 0)
- {
- Unbind (theCtx);
- return false;
- }
-
- aDataPtr = (GLvoid* )aCopy.Data();
- anUnpackSentry.Reset();
+ glTexSubImage1D (GL_TEXTURE_1D, 0, 0,
+ theSizeX, thePixelFormat, theDataType, aDataPtr);
+ Unbind (theCtx);
+ return true;
}
// use proxy to check texture could be created or not
- glTexImage1D (GL_PROXY_TEXTURE_1D, 0, myTextFormat,
- aWidthOut, 0,
- aPixelFormat, aDataType, NULL);
- glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth);
+ glTexImage1D (GL_PROXY_TEXTURE_1D, 0, anIntFormat,
+ theSizeX, 0,
+ thePixelFormat, theDataType, NULL);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_1D, 0, GL_TEXTURE_WIDTH, &aTestWidth);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_1D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat);
if (aTestWidth == 0)
{
// no memory or broken input parameters
Unbind (theCtx);
+ Release (theCtx.operator->());
return false;
}
- glTexImage1D (GL_TEXTURE_1D, 0, myTextFormat,
- aWidthOut, 0,
- aPixelFormat, aDataType, aDataPtr);
+ glTexImage1D (GL_TEXTURE_1D, 0, anIntFormat,
+ theSizeX, 0,
+ thePixelFormat, theDataType, aDataPtr);
if (glGetError() != GL_NO_ERROR)
{
Unbind (theCtx);
+ Release (theCtx.operator->());
return false;
}
- mySizeX = aWidthOut;
+ mySizeX = theSizeX;
mySizeY = 1;
Unbind (theCtx);
return true;
+ #else
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
+ "Error: 1D textures are not supported by hardware.");
+ Release (theCtx.operator->());
+ return false;
+ #endif
}
case Graphic3d_TOT_2D:
{
- myTarget = GL_TEXTURE_2D;
Bind (theCtx);
- glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- Image_PixMap aCopy;
- GLvoid* aDataPtr = (GLvoid* )theImage.Data();
- if (aWidth != aWidthOut || aHeight != aHeightOut)
+ applyDefaultSamplerParams (theCtx);
+ if (toPatchExisting)
{
- // scale texture
- glPixelStorei (GL_PACK_ALIGNMENT, 1);
- glPixelStorei (GL_PACK_ROW_LENGTH, 0);
- if (!aCopy.InitTrash (theImage.Format(), Standard_Size(aWidthOut), Standard_Size(aHeightOut))
- || gluScaleImage (aPixelFormat,
- aWidth, aHeight, aDataType, theImage.Data(),
- aWidthOut, aHeightOut, aDataType, aCopy.ChangeData()) != 0)
- {
- Unbind (theCtx);
- return false;
- }
-
- aDataPtr = (GLvoid* )aCopy.Data();
- anUnpackSentry.Reset();
+ glTexSubImage2D (GL_TEXTURE_2D, 0,
+ 0, 0,
+ theSizeX, theSizeY,
+ thePixelFormat, theDataType, aDataPtr);
+ Unbind (theCtx);
+ return true;
}
+ #if !defined(GL_ES_VERSION_2_0)
// use proxy to check texture could be created or not
- glTexImage2D (GL_PROXY_TEXTURE_2D, 0, myTextFormat,
- aWidthOut, aHeightOut, 0,
- aPixelFormat, aDataType, NULL);
+ glTexImage2D (GL_PROXY_TEXTURE_2D, 0, anIntFormat,
+ theSizeX, theSizeY, 0,
+ thePixelFormat, theDataType, NULL);
glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth);
glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat);
if (aTestWidth == 0 || aTestHeight == 0)
{
// no memory or broken input parameters
Unbind (theCtx);
+ Release (theCtx.operator->());
return false;
}
+ #endif
- glTexImage2D (GL_TEXTURE_2D, 0, myTextFormat,
- aWidthOut, aHeightOut, 0,
- aPixelFormat, aDataType, aDataPtr);
- if (glGetError() != GL_NO_ERROR)
+ glTexImage2D (GL_TEXTURE_2D, 0, anIntFormat,
+ theSizeX, theSizeY, 0,
+ thePixelFormat, theDataType, aDataPtr);
+ const GLenum anErr = glGetError();
+ if (anErr != GL_NO_ERROR)
{
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
+ TCollection_AsciiString ("Error: 2D texture ") + theSizeX + "x" + theSizeY
+ + " IF: " + int(anIntFormat) + " PF: " + int(thePixelFormat) + " DT: " + int(theDataType)
+ + " can not be created with error " + int(anErr) + ".");
Unbind (theCtx);
+ Release (theCtx.operator->());
return false;
}
- mySizeX = aWidthOut;
- mySizeY = aHeightOut;
+ mySizeX = theSizeX;
+ mySizeY = theSizeY;
Unbind (theCtx);
return true;
}
case Graphic3d_TOT_2D_MIPMAP:
{
- myTarget = GL_TEXTURE_2D;
- myHasMipmaps = Standard_True;
Bind (theCtx);
- glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
- glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
-
- if (theCtx->extFBO != NULL
- && aWidth == aWidthOut && aHeight == aHeightOut)
+ applyDefaultSamplerParams (theCtx);
+ if (toPatchExisting)
{
- // use proxy to check texture could be created or not
- glTexImage2D (GL_PROXY_TEXTURE_2D, 0, myTextFormat,
- aWidthOut, aHeightOut, 0,
- aPixelFormat, aDataType, NULL);
- glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth);
- glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight);
- if (aTestWidth == 0 || aTestHeight == 0)
+ glTexSubImage2D (GL_TEXTURE_2D, 0,
+ 0, 0,
+ theSizeX, theSizeY,
+ thePixelFormat, theDataType, aDataPtr);
+ if (theCtx->arbFBO != NULL)
{
- // no memory or broken input parameters
- Unbind (theCtx);
- return false;
+ // generate mipmaps
+ theCtx->arbFBO->glGenerateMipmap (GL_TEXTURE_2D);
+ if (glGetError() != GL_NO_ERROR)
+ {
+ Unbind (theCtx);
+ Release (theCtx.operator->());
+ return false;
+ }
}
- // upload main picture
- glTexImage2D (GL_TEXTURE_2D, 0, myTextFormat,
- aWidthOut, aHeightOut, 0,
- aPixelFormat, aDataType, theImage.Data());
- if (glGetError() != GL_NO_ERROR)
- {
- Unbind (theCtx);
- return false;
- }
+ Unbind (theCtx);
+ return true;
+ }
- mySizeX = aWidthOut;
- mySizeY = aHeightOut;
+ #if !defined(GL_ES_VERSION_2_0)
+ // use proxy to check texture could be created or not
+ glTexImage2D (GL_PROXY_TEXTURE_2D, 0, anIntFormat,
+ theSizeX, theSizeY, 0,
+ thePixelFormat, theDataType, NULL);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &aTestWidth);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &aTestHeight);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat);
+ if (aTestWidth == 0 || aTestHeight == 0)
+ {
+ // no memory or broken input parameters
+ Unbind (theCtx);
+ Release (theCtx.operator->());
+ return false;
+ }
+ #endif
+ // upload main picture
+ glTexImage2D (GL_TEXTURE_2D, 0, anIntFormat,
+ theSizeX, theSizeY, 0,
+ thePixelFormat, theDataType, theImage->Data());
+ const GLenum aTexImgErr = glGetError();
+ if (aTexImgErr != GL_NO_ERROR)
+ {
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
+ TCollection_AsciiString ("Error: 2D texture ") + theSizeX + "x" + theSizeY
+ + " IF: " + int(anIntFormat) + " PF: " + int(thePixelFormat) + " DT: " + int(theDataType)
+ + " can not be created with error " + int(aTexImgErr) + ".");
+ Unbind (theCtx);
+ Release (theCtx.operator->());
+ return false;
+ }
+
+ mySizeX = theSizeX;
+ mySizeY = theSizeY;
+
+ if (theCtx->arbFBO != NULL)
+ {
// generate mipmaps
//glHint (GL_GENERATE_MIPMAP_HINT, GL_NICEST);
- theCtx->extFBO->glGenerateMipmapEXT (GL_TEXTURE_2D);
+ theCtx->arbFBO->glGenerateMipmap (GL_TEXTURE_2D);
- Unbind (theCtx);
- return true;
+ if (glGetError() != GL_NO_ERROR)
+ {
+ Unbind (theCtx);
+ Release (theCtx.operator->());
+ return false;
+ }
}
else
{
- bool isCreated = gluBuild2DMipmaps (GL_TEXTURE_2D, myTextFormat,
- aWidth, aHeight,
- aPixelFormat, aDataType, theImage.Data()) == 0;
- if (isCreated)
- {
- glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &mySizeX);
- glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &mySizeY);
- }
+ const TCollection_ExtendedString aWarnMessage ("Warning: generating mipmaps requires GL_ARB_framebuffer_object extension which is missing.");
+
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aWarnMessage);
Unbind (theCtx);
- return isCreated;
+ Release (theCtx.operator->());
+ return false;
}
+
+ Unbind (theCtx);
+ return true;
}
- default:
- {
- return false;
- }
}
+
+ Release (theCtx.operator->());
+ return false;
+}
+
+// =======================================================================
+// function : Init
+// purpose :
+// =======================================================================
+bool OpenGl_Texture::Init (const Handle(OpenGl_Context)& theCtx,
+ const Image_PixMap& theImage,
+ const Graphic3d_TypeOfTexture theType)
+{
+ if (theImage.IsEmpty())
+ {
+ Release (theCtx.operator->());
+ return false;
+ }
+
+ GLenum aPixelFormat;
+ GLenum aDataType;
+ GLint aTextFormat;
+ if (!GetDataFormat (theCtx, theImage, aTextFormat, aPixelFormat, aDataType))
+ {
+ Release (theCtx.operator->());
+ return false;
+ }
+
+ return Init (theCtx,
+ aTextFormat, aPixelFormat, aDataType,
+ (Standard_Integer)theImage.SizeX(),
+ (Standard_Integer)theImage.SizeY(),
+ theType, &theImage);
+}
+
+// =======================================================================
+// function : Init2DMultisample
+// purpose :
+// =======================================================================
+bool OpenGl_Texture::Init2DMultisample (const Handle(OpenGl_Context)& theCtx,
+ const GLsizei theNbSamples,
+ const GLint theTextFormat,
+ const GLsizei theSizeX,
+ const GLsizei theSizeY)
+{
+ if (!Create (theCtx)
+ || theNbSamples > theCtx->MaxMsaaSamples()
+ || theNbSamples < 1)
+ {
+ return false;
+ }
+
+ myNbSamples = OpenGl_Context::GetPowerOfTwo (theNbSamples, theCtx->MaxMsaaSamples());
+ myTarget = GL_TEXTURE_2D_MULTISAMPLE;
+ myHasMipmaps = false;
+ if(theSizeX > theCtx->MaxTextureSize()
+ || theSizeY > theCtx->MaxTextureSize())
+ {
+ return false;
+ }
+
+ Bind (theCtx);
+ //myTextFormat = theTextFormat;
+ mySizedFormat = theTextFormat;
+#if !defined(GL_ES_VERSION_2_0)
+ if (theCtx->Functions()->glTexStorage2DMultisample != NULL)
+ {
+ theCtx->Functions()->glTexStorage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE);
+ }
+ else
+ {
+ theCtx->Functions()->glTexImage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE);
+ }
+#else
+ theCtx->Functions() ->glTexStorage2DMultisample (myTarget, myNbSamples, theTextFormat, theSizeX, theSizeY, GL_FALSE);
+#endif
+ if (theCtx->core11fwd->glGetError() != GL_NO_ERROR)
+ {
+ Unbind (theCtx);
+ return false;
+ }
+
+ mySizeX = theSizeX;
+ mySizeY = theSizeY;
+
+ Unbind (theCtx);
+ return true;
+}
+
+// =======================================================================
+// function : InitRectangle
+// purpose :
+// =======================================================================
+bool OpenGl_Texture::InitRectangle (const Handle(OpenGl_Context)& theCtx,
+ const Standard_Integer theSizeX,
+ const Standard_Integer theSizeY,
+ const OpenGl_TextureFormat& theFormat)
+{
+ if (!Create (theCtx) || !theCtx->IsGlGreaterEqual (3, 0))
+ {
+ return false;
+ }
+
+#if !defined(GL_ES_VERSION_2_0)
+ myTarget = GL_TEXTURE_RECTANGLE;
+ myNbSamples = 1;
+ myHasMipmaps = false;
+
+ const GLsizei aSizeX = Min (theCtx->MaxTextureSize(), theSizeX);
+ const GLsizei aSizeY = Min (theCtx->MaxTextureSize(), theSizeY);
+
+ Bind (theCtx);
+ applyDefaultSamplerParams (theCtx);
+
+ myTextFormat = theFormat.Format();
+ mySizedFormat = theFormat.Internal();
+
+ // setup the alignment
+ OpenGl_UnpackAlignmentSentry::Reset();
+
+ glTexImage2D (GL_PROXY_TEXTURE_RECTANGLE, 0, mySizedFormat,
+ aSizeX, aSizeY, 0,
+ myTextFormat, GL_FLOAT, NULL);
+
+ GLint aTestSizeX = 0;
+ GLint aTestSizeY = 0;
+
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_WIDTH, &aTestSizeX);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_HEIGHT, &aTestSizeY);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_RECTANGLE, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat);
+
+ if (aTestSizeX == 0 || aTestSizeY == 0)
+ {
+ Unbind (theCtx);
+ return false;
+ }
+
+ glTexImage2D (myTarget, 0, mySizedFormat,
+ aSizeX, aSizeY, 0,
+ myTextFormat, GL_FLOAT, NULL);
+
+ if (glGetError() != GL_NO_ERROR)
+ {
+ Unbind (theCtx);
+ return false;
+ }
+
+ mySizeX = aSizeX;
+ mySizeY = aSizeY;
+
+ Unbind (theCtx);
+ return true;
+#else
+ (void )theSizeX;
+ (void )theSizeY;
+ (void )theFormat;
+ return false;
+#endif
+}
+
+// =======================================================================
+// function : Init3D
+// purpose :
+// =======================================================================
+bool OpenGl_Texture::Init3D (const Handle(OpenGl_Context)& theCtx,
+ const GLint theTextFormat,
+ const GLenum thePixelFormat,
+ const GLenum theDataType,
+ const Standard_Integer theSizeX,
+ const Standard_Integer theSizeY,
+ const Standard_Integer theSizeZ,
+ const void* thePixels)
+{
+ if (theCtx->Functions()->glTexImage3D == NULL)
+ {
+ TCollection_ExtendedString aMsg ("Error: three-dimensional textures are not supported by hardware.");
+
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION,
+ GL_DEBUG_TYPE_ERROR,
+ 0,
+ GL_DEBUG_SEVERITY_HIGH,
+ aMsg);
+
+ return false;
+ }
+
+ if (!Create(theCtx))
+ {
+ return false;
+ }
+
+ myTarget = GL_TEXTURE_3D;
+ myNbSamples = 1;
+ myHasMipmaps = false;
+
+ const GLsizei aSizeX = Min (theCtx->MaxTextureSize(), theSizeX);
+ const GLsizei aSizeY = Min (theCtx->MaxTextureSize(), theSizeY);
+ const GLsizei aSizeZ = Min (theCtx->MaxTextureSize(), theSizeZ);
+
+ Bind (theCtx);
+
+ if (theDataType == GL_FLOAT && !theCtx->arbTexFloat)
+ {
+ TCollection_ExtendedString aMsg ("Error: floating-point textures are not supported by hardware.");
+
+ theCtx->PushMessage (GL_DEBUG_SOURCE_APPLICATION,
+ GL_DEBUG_TYPE_ERROR,
+ 0,
+ GL_DEBUG_SEVERITY_HIGH,
+ aMsg);
+
+ Release (theCtx.operator->());
+ Unbind (theCtx);
+ return false;
+ }
+
+ mySizedFormat = theTextFormat;
+
+ // setup the alignment
+ OpenGl_UnpackAlignmentSentry::Reset();
+
+#if !defined (GL_ES_VERSION_2_0)
+ theCtx->core15fwd->glTexImage3D (GL_PROXY_TEXTURE_3D, 0, mySizedFormat,
+ aSizeX, aSizeY, aSizeZ, 0,
+ thePixelFormat, theDataType, NULL);
+
+ GLint aTestSizeX = 0;
+ GLint aTestSizeY = 0;
+ GLint aTestSizeZ = 0;
+
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_WIDTH, &aTestSizeX);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_HEIGHT, &aTestSizeY);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_DEPTH, &aTestSizeZ);
+ glGetTexLevelParameteriv (GL_PROXY_TEXTURE_3D, 0, GL_TEXTURE_INTERNAL_FORMAT, &mySizedFormat);
+
+ if (aTestSizeX == 0 || aTestSizeY == 0 || aTestSizeZ == 0)
+ {
+ Unbind (theCtx);
+ Release (theCtx.operator->());
+ return false;
+ }
+#endif
+
+ applyDefaultSamplerParams (theCtx);
+ theCtx->Functions()->glTexImage3D (myTarget, 0, mySizedFormat,
+ aSizeX, aSizeY, aSizeZ, 0,
+ thePixelFormat, theDataType, thePixels);
+
+ if (glGetError() != GL_NO_ERROR)
+ {
+ Unbind (theCtx);
+ Release (theCtx.operator->());
+ return false;
+ }
+
+ mySizeX = aSizeX;
+ mySizeY = aSizeY;
+ mySizeZ = aSizeZ;
+
+ Unbind (theCtx);
+ return true;
+}
+
+// =======================================================================
+// function : PixelSizeOfPixelFormat
+// purpose :
+// =======================================================================
+Standard_Size OpenGl_Texture::PixelSizeOfPixelFormat (Standard_Integer theInternalFormat)
+{
+ switch(theInternalFormat)
+ {
+ // RED variations (GL_RED, OpenGL 3.0+)
+ case GL_RED:
+ case GL_R8: return 1;
+ case GL_R16: return 2;
+ case GL_R16F: return 2;
+ case GL_R32F: return 4;
+ // RGB variations
+ case GL_RGB: return 3;
+ case GL_RGB8: return 3;
+ case GL_RGB16: return 6;
+ case GL_RGB16F: return 6;
+ case GL_RGB32F: return 12;
+ // RGBA variations
+ case GL_RGBA: return 4;
+ case GL_RGBA8: return 4;
+ case GL_RGB10_A2: return 4;
+ case GL_RGBA12: return 6;
+ case GL_RGBA16: return 8;
+ case GL_RGBA16F: return 8;
+ case GL_RGBA32F: return 16;
+ //
+ case GL_BGRA_EXT: return 4;
+ // ALPHA variations (deprecated)
+ case GL_ALPHA:
+ case GL_ALPHA8: return 1;
+ case GL_ALPHA16: return 2;
+ case GL_LUMINANCE: return 1;
+ case GL_LUMINANCE_ALPHA: return 2;
+ // depth-stencil
+ case GL_DEPTH24_STENCIL8: return 4;
+ case GL_DEPTH32F_STENCIL8: return 8;
+ case GL_DEPTH_COMPONENT16: return 2;
+ case GL_DEPTH_COMPONENT24: return 3;
+ case GL_DEPTH_COMPONENT32F: return 4;
+ }
+ return 0;
+}
+
+// =======================================================================
+// function : EstimatedDataSize
+// purpose :
+// =======================================================================
+Standard_Size OpenGl_Texture::EstimatedDataSize() const
+{
+ if (!IsValid())
+ {
+ return 0;
+ }
+
+ Standard_Size aSize = PixelSizeOfPixelFormat (mySizedFormat) * mySizeX * myNbSamples;
+ if (mySizeY != 0)
+ {
+ aSize *= Standard_Size(mySizeY);
+ }
+ if (mySizeZ != 0)
+ {
+ aSize *= Standard_Size(mySizeZ);
+ }
+ if (myHasMipmaps)
+ {
+ aSize = aSize + aSize / 3;
+ }
+ return aSize;
}
projects / occt.git / blobdiff