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From Likasz Izebski, "added support for etc2/eac compression"

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This commit is contained in:
Robert Osfield 2013-10-28 12:03:55 +00:00
parent ac383e15c1
commit ff8fe4143e
5 changed files with 142 additions and 2 deletions
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13
include/osg/Image
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@ -97,6 +97,19 @@
#define GL_ETC1_RGB8_OES 0x8D64
#endif
#ifndef GL_ARB_ES3_compatibility
#define GL_COMPRESSED_RGB8_ETC2 0x9274
#define GL_COMPRESSED_SRGB8_ETC2 0x9275
#define GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 0x9276
#define GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2 0x9277
#define GL_COMPRESSED_RGBA8_ETC2_EAC 0x9278
#define GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC 0x9279
#define GL_COMPRESSED_R11_EAC 0x9270
#define GL_COMPRESSED_SIGNED_R11_EAC 0x9271
#define GL_COMPRESSED_RG11_EAC 0x9272
#define GL_COMPRESSED_SIGNED_RG11_EAC 0x9273
#endif
#ifndef GL_DEPTH_COMPONENT
#define GL_DEPTH_COMPONENT 0x1902
#endif

5
include/osg/Texture
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@ -553,6 +553,7 @@ class OSG_EXPORT Texture : public osg::StateAttribute
USE_PVRTC_2BPP_COMPRESSION,
USE_PVRTC_4BPP_COMPRESSION,
USE_ETC_COMPRESSION,
USE_ETC2_COMPRESSION,
USE_RGTC1_COMPRESSION,
USE_RGTC2_COMPRESSION,
USE_S3TC_DXT1c_COMPRESSION,
@ -794,6 +795,9 @@ class OSG_EXPORT Texture : public osg::StateAttribute
void setTextureCompressionETCSupported(bool flag) { _isTextureCompressionETCSupported=flag; }
bool isTextureCompressionETCSupported() const { return _isTextureCompressionETCSupported; }
void setTextureCompressionETC2Supported(bool flag) { _isTextureCompressionETC2Supported=flag; }
bool isTextureCompressionETC2Supported() const { return _isTextureCompressionETC2Supported; }
void setTextureCompressionRGTCSupported(bool flag) { _isTextureCompressionRGTCSupported=flag; }
bool isTextureCompressionRGTCSupported() const { return _isTextureCompressionRGTCSupported; }
@ -916,6 +920,7 @@ class OSG_EXPORT Texture : public osg::StateAttribute
bool _isTextureCompressionPVRTC2BPPSupported;
bool _isTextureCompressionPVRTC4BPPSupported;
bool _isTextureCompressionETCSupported;
bool _isTextureCompressionETC2Supported;
bool _isTextureCompressionRGTCSupported;
bool _isTextureCompressionPVRTCSupported;
bool _isTextureMirroredRepeatSupported;

54
src/osg/Image.cpp
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@ -495,6 +495,16 @@ unsigned int Image::computeNumComponents(GLenum pixelFormat)
case(GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG): return 4;
case(GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG): return 4;
case(GL_ETC1_RGB8_OES): return 3;
case(GL_COMPRESSED_RGB8_ETC2): return 3;
case(GL_COMPRESSED_SRGB8_ETC2): return 3;
case(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2): return 4;
case(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2): return 4;
case(GL_COMPRESSED_RGBA8_ETC2_EAC): return 4;
case(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC): return 4;
case(GL_COMPRESSED_R11_EAC): return 1;
case(GL_COMPRESSED_SIGNED_R11_EAC): return 1;
case(GL_COMPRESSED_RG11_EAC): return 2;
case(GL_COMPRESSED_SIGNED_RG11_EAC): return 2;
case(GL_COLOR_INDEX): return 1;
case(GL_STENCIL_INDEX): return 1;
case(GL_DEPTH_COMPONENT): return 1;
@ -613,6 +623,16 @@ unsigned int Image::computePixelSizeInBits(GLenum format,GLenum type)
case(GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG): return 4;
case(GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG): return 2;
case(GL_ETC1_RGB8_OES): return 4;
case(GL_COMPRESSED_RGB8_ETC2): return 4;
case(GL_COMPRESSED_SRGB8_ETC2): return 4;
case(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2): return 4;
case(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2): return 4;
case(GL_COMPRESSED_RGBA8_ETC2_EAC): return 8;
case(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC): return 8;
case(GL_COMPRESSED_R11_EAC): return 4;
case(GL_COMPRESSED_SIGNED_R11_EAC): return 4;
case(GL_COMPRESSED_RG11_EAC): return 8;
case(GL_COMPRESSED_SIGNED_RG11_EAC): return 8;
default: break;
}
@ -720,6 +740,20 @@ unsigned int Image::computeBlockSize(GLenum pixelFormat, GLenum packing)
case(GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT):
case(GL_COMPRESSED_RED_GREEN_RGTC2_EXT):
return osg::maximum(16u,packing); // block size of 16
case(GL_COMPRESSED_RGB8_ETC2):
case(GL_COMPRESSED_SRGB8_ETC2):
case(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_R11_EAC):
case(GL_COMPRESSED_SIGNED_R11_EAC):
return osg::maximum(8u,packing); // block size of 8
case(GL_COMPRESSED_RGBA8_ETC2_EAC):
case(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC):
case(GL_COMPRESSED_RG11_EAC):
case(GL_COMPRESSED_SIGNED_RG11_EAC):
return osg::maximum(16u,packing); // block size of 16
default:
break;
}
@ -825,6 +859,16 @@ bool Image::isCompressed() const
case(GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG):
case(GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG):
case(GL_ETC1_RGB8_OES):
case(GL_COMPRESSED_RGB8_ETC2):
case(GL_COMPRESSED_SRGB8_ETC2):
case(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_RGBA8_ETC2_EAC):
case(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC):
case(GL_COMPRESSED_R11_EAC):
case(GL_COMPRESSED_SIGNED_R11_EAC):
case(GL_COMPRESSED_RG11_EAC):
case(GL_COMPRESSED_SIGNED_RG11_EAC):
return true;
default:
return false;
@ -1587,6 +1631,16 @@ bool Image::supportsTextureSubloading() const
switch(_internalTextureFormat)
{
case GL_ETC1_RGB8_OES:
case(GL_COMPRESSED_RGB8_ETC2):
case(GL_COMPRESSED_SRGB8_ETC2):
case(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_RGBA8_ETC2_EAC):
case(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC):
case(GL_COMPRESSED_R11_EAC):
case(GL_COMPRESSED_SIGNED_R11_EAC):
case(GL_COMPRESSED_RG11_EAC):
case(GL_COMPRESSED_SIGNED_RG11_EAC):
return false;
default:
return true;

62
src/osg/Texture.cpp
View File

@ -140,6 +140,17 @@ void Texture::TextureProfile::computeSize()
case(GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG): numBitsPerTexel = 4; break;
case(GL_ETC1_RGB8_OES): numBitsPerTexel = 4; break;
case(GL_COMPRESSED_RGB8_ETC2): numBitsPerTexel = 4; break;
case(GL_COMPRESSED_SRGB8_ETC2): numBitsPerTexel = 4; break;
case(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2): numBitsPerTexel = 8; break;
case(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2): numBitsPerTexel = 8; break;
case(GL_COMPRESSED_RGBA8_ETC2_EAC): numBitsPerTexel = 8; break;
case(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC): numBitsPerTexel = 8; break;
case(GL_COMPRESSED_R11_EAC): numBitsPerTexel = 4; break;
case(GL_COMPRESSED_SIGNED_R11_EAC): numBitsPerTexel = 4; break;
case(GL_COMPRESSED_RG11_EAC): numBitsPerTexel = 8; break;
case(GL_COMPRESSED_SIGNED_RG11_EAC): numBitsPerTexel = 8; break;
}
_size = (unsigned int)(ceil(double(_width * _height * _depth * numBitsPerTexel)/8.0));
@ -1412,6 +1423,24 @@ void Texture::computeInternalFormatWithImage(const osg::Image& image) const
}
break;
case(USE_ETC2_COMPRESSION):
if (extensions->isTextureCompressionETC2Supported())
{
switch(image.getPixelFormat())
{
case(1):
case(GL_RED): internalFormat = GL_COMPRESSED_R11_EAC; break;
case(2):
case(GL_RG): internalFormat = GL_COMPRESSED_RG11_EAC; break;
case(3):
case(GL_RGB): internalFormat = GL_COMPRESSED_RGB8_ETC2; break;
case(4):
case(GL_RGBA): internalFormat = GL_COMPRESSED_RGBA8_ETC2_EAC; break;
default: internalFormat = image.getInternalTextureFormat(); break;
}
}
break;
case(USE_RGTC1_COMPRESSION):
if (extensions->isTextureCompressionRGTCSupported())
{
@ -1581,6 +1610,16 @@ bool Texture::isCompressedInternalFormat(GLint internalFormat)
case(GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT):
case(GL_COMPRESSED_RED_GREEN_RGTC2_EXT):
case(GL_ETC1_RGB8_OES):
case(GL_COMPRESSED_RGB8_ETC2):
case(GL_COMPRESSED_SRGB8_ETC2):
case(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_RGBA8_ETC2_EAC):
case(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC):
case(GL_COMPRESSED_R11_EAC):
case(GL_COMPRESSED_SIGNED_R11_EAC):
case(GL_COMPRESSED_RG11_EAC):
case(GL_COMPRESSED_SIGNED_RG11_EAC):
case(GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG):
case(GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG):
case(GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG):
@ -1597,8 +1636,16 @@ void Texture::getCompressedSize(GLenum internalFormat, GLint width, GLint height
blockSize = 8;
else if (internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT3_EXT || internalFormat == GL_COMPRESSED_RGBA_S3TC_DXT5_EXT)
blockSize = 16;
else if (internalFormat == GL_ETC1_RGB8_OES)
else if (internalFormat == GL_COMPRESSED_RGB8_ETC2 || internalFormat == GL_COMPRESSED_SRGB8_ETC2)
blockSize = 8;
else if (internalFormat == GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 || internalFormat == GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2)
blockSize = 8;
else if (internalFormat == GL_COMPRESSED_RGBA8_ETC2_EAC || internalFormat == GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC)
blockSize = 16;
else if (internalFormat == GL_COMPRESSED_R11_EAC || internalFormat == GL_COMPRESSED_SIGNED_R11_EAC)
blockSize = 8;
else if (internalFormat == GL_COMPRESSED_RG11_EAC || internalFormat == GL_COMPRESSED_SIGNED_RG11_EAC)
blockSize = 16;
else if (internalFormat == GL_COMPRESSED_RED_RGTC1_EXT || internalFormat == GL_COMPRESSED_SIGNED_RED_RGTC1_EXT)
blockSize = 8;
else if (internalFormat == GL_COMPRESSED_RED_GREEN_RGTC2_EXT || internalFormat == GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT)
@ -1878,21 +1925,31 @@ void Texture::applyTexImage2D_load(State& state, GLenum target, const Image* ima
case GL_COMPRESSED_RGB_PVRTC_2BPPV1_IMG:
case GL_COMPRESSED_RGB_PVRTC_4BPPV1_IMG:
case GL_ETC1_RGB8_OES:
case(GL_COMPRESSED_RGB8_ETC2):
case(GL_COMPRESSED_SRGB8_ETC2):
case GL_COMPRESSED_RGB: _internalFormat = GL_RGB; break;
case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
case GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG:
case GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG:
case(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2):
case(GL_COMPRESSED_RGBA8_ETC2_EAC):
case(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC):
case GL_COMPRESSED_RGBA: _internalFormat = GL_RGBA; break;
case GL_COMPRESSED_ALPHA: _internalFormat = GL_ALPHA; break;
case GL_COMPRESSED_LUMINANCE: _internalFormat = GL_LUMINANCE; break;
case GL_COMPRESSED_LUMINANCE_ALPHA: _internalFormat = GL_LUMINANCE_ALPHA; break;
case GL_COMPRESSED_INTENSITY: _internalFormat = GL_INTENSITY; break;
case(GL_COMPRESSED_R11_EAC):
case(GL_COMPRESSED_SIGNED_R11_EAC):
case GL_COMPRESSED_SIGNED_RED_RGTC1_EXT:
case GL_COMPRESSED_RED_RGTC1_EXT: _internalFormat = GL_RED; break;
case(GL_COMPRESSED_RG11_EAC):
case(GL_COMPRESSED_SIGNED_RG11_EAC):
case GL_COMPRESSED_SIGNED_RED_GREEN_RGTC2_EXT:
case GL_COMPRESSED_RED_GREEN_RGTC2_EXT: _internalFormat = GL_LUMINANCE_ALPHA; break;
case GL_COMPRESSED_RED_GREEN_RGTC2_EXT: _internalFormat = GL_RG; break;
}
}
@ -2545,6 +2602,7 @@ Texture::Extensions::Extensions(unsigned int contextID)
_isTextureCompressionETCSupported = isGLExtensionSupported(contextID,"GL_OES_compressed_ETC1_RGB8_texture");
_isTextureCompressionETC2Supported = isGLExtensionSupported(contextID,"GL_ARB_ES3_compatibility");
_isTextureCompressionRGTCSupported = isGLExtensionSupported(contextID,"GL_EXT_texture_compression_rgtc");

10
src/osgDB/ObjectWrapper.cpp
View File

@ -491,6 +491,16 @@ ObjectWrapperManager::ObjectWrapperManager()
glTable.add( "GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG",GL_COMPRESSED_RGBA_PVRTC_4BPPV1_IMG );
glTable.add( "GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG",GL_COMPRESSED_RGBA_PVRTC_2BPPV1_IMG );
glTable.add( "GL_ETC1_RGB8_OES",GL_ETC1_RGB8_OES );
glTable.add( "GL_COMPRESSED_RGB8_ETC2",GL_COMPRESSED_RGB8_ETC2 );
glTable.add( "GL_COMPRESSED_SRGB8_ETC2",GL_COMPRESSED_SRGB8_ETC2 );
glTable.add( "GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2",GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 );
glTable.add( "GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2",GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2 );
glTable.add( "GL_COMPRESSED_RGBA8_ETC2_EAC",GL_COMPRESSED_RGBA8_ETC2_EAC );
glTable.add( "GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC",GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC );
glTable.add( "GL_COMPRESSED_R11_EAC",GL_COMPRESSED_R11_EAC );
glTable.add( "GL_COMPRESSED_SIGNED_R11_EAC",GL_COMPRESSED_SIGNED_R11_EAC );
glTable.add( "GL_COMPRESSED_RG11_EAC",GL_COMPRESSED_RG11_EAC );
glTable.add( "GL_COMPRESSED_SIGNED_RG11_EAC",GL_COMPRESSED_SIGNED_RG11_EAC );
// Texture source types
glTable.add( "GL_BYTE", GL_BYTE );