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From Pavel Moloshtan, add support to osg::Texture files for GL_ARB_shadow_ambinet support

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This commit is contained in:
Robert Osfield
2004-01-29 11:16:49 +00:00
parent 7a94ab3903
commit 475c583975
3 changed files with 37 additions and 7 deletions
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22
src/osg/Texture.cpp
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@@ -178,7 +178,8 @@ Texture::Texture():
_internalFormat(0),
_use_shadow_comparison(false),
_shadow_compare_func(LEQUAL),
_shadow_texture_mode(LUMINANCE)
_shadow_texture_mode(LUMINANCE),
_shadow_ambient(0)
{
}
@@ -198,7 +199,8 @@ Texture::Texture(const Texture& text,const CopyOp& copyop):
_internalFormat(text._internalFormat),
_use_shadow_comparison(text._use_shadow_comparison),
_shadow_compare_func(text._shadow_compare_func),
_shadow_texture_mode(text._shadow_texture_mode)
_shadow_texture_mode(text._shadow_texture_mode),
_shadow_ambient(text._shadow_ambient)
{
}
@@ -224,6 +226,7 @@ int Texture::compareTexture(const Texture& rhs) const
COMPARE_StateAttribute_Parameter(_use_shadow_comparison)
COMPARE_StateAttribute_Parameter(_shadow_compare_func)
COMPARE_StateAttribute_Parameter(_shadow_texture_mode)
COMPARE_StateAttribute_Parameter(_shadow_ambient)
return 0;
}
@@ -494,6 +497,13 @@ void Texture::applyTexParameters(GLenum target, State& state) const
glTexParameteri(target, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);
glTexParameteri(target, GL_TEXTURE_COMPARE_FUNC_ARB, _shadow_compare_func);
glTexParameteri(target, GL_DEPTH_TEXTURE_MODE_ARB, _shadow_texture_mode);
// if ambient value is 0 - it is default behaviour of GL_ARB_shadow
// no need for GL_ARB_shadow_ambient in this case
if (extensions->isShadowAmbientSupported() && _shadow_ambient > 0)
{
glTexParameterf(target, TEXTURE_COMPARE_FAIL_VALUE_ARB, _shadow_ambient);
}
}
else
{
@@ -1038,6 +1048,9 @@ Texture::Extensions::Extensions(const Extensions& rhs):
_maxTextureSize = rhs._maxTextureSize;
_glCompressedTexImage2D = rhs._glCompressedTexImage2D;
_isShadowSupported = rhs._isShadowSupported;
_isShadowAmbientSupported = rhs._isShadowAmbientSupported;
}
void Texture::Extensions::lowestCommonDenominator(const Extensions& rhs)
@@ -1059,6 +1072,9 @@ void Texture::Extensions::lowestCommonDenominator(const Extensions& rhs)
if (!rhs._glCompressedTexImage2D) _glCompressedTexImage2D = 0;
if (!rhs._glCompressedTexSubImage2D) _glCompressedTexSubImage2D = 0;
if (!rhs._glGetCompressedTexImage) _glGetCompressedTexImage = 0;
if (!rhs._isShadowSupported) _isShadowSupported = 0;
if (!rhs._isShadowAmbientSupported) _isShadowAmbientSupported = 0;
}
void Texture::Extensions::setupGLExtenions()
@@ -1076,7 +1092,7 @@ void Texture::Extensions::setupGLExtenions()
_isGenerateMipMapSupported = (strncmp((const char*)glGetString(GL_VERSION),"1.4",3)>=0) ||
isGLExtensionSupported("GL_SGIS_generate_mipmap");
_isShadowSupported = isGLExtensionSupported("GL_ARB_shadow");
_isShadowAmbientSupported = isGLExtensionSupported("GL_ARB_shadow_ambient");
glGetIntegerv(GL_MAX_TEXTURE_SIZE,&_maxTextureSize);