FGFS-4.1/OpenSceneGraph
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Added support for only enabling SignedDistanceField shader path when font resolution is greater than 16.

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This commit is contained in:
Robert Osfield 2017-09-20 15:51:03 +01:00
parent fb0a995d7b
commit 78811462f1
4 changed files with 31 additions and 20 deletions
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2
include/osgText/Text
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@ -278,8 +278,6 @@ protected:
virtual osg::StateSet* createStateSet();
void assignStateSet();
Font* getActiveFont();
const Font* getActiveFont() const;

17
src/osgText/Text.cpp
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@ -117,6 +117,18 @@ osg::StateSet* Text::createStateSet()
defineList["SHADOW"] = osg::StateSet::DefinePair(ss.str(), osg::StateAttribute::ON);
}
if (_fontSize.second>16)
{
OSG_NOTICE<<"Requesting SDF support _fontSize.second="<<_fontSize.second<<std::endl;
defineList["SIGNED_DISTNACE_FIELD"] = osg::StateSet::DefinePair("1", osg::StateAttribute::ON);
}
else
{
OSG_NOTICE<<"Disabling SDF support _fontSize.second="<<_fontSize.second<<std::endl;
}
}
#if 0
@ -205,11 +217,6 @@ osg::StateSet* Text::createStateSet()
return stateset.release();
}
void Text::assignStateSet()
{
setStateSet(createStateSet());
}
Font* Text::getActiveFont()
{
return _font.valid() ? _font.get() : Font::getDefaultFont().get();

3
src/osgText/TextBase.cpp
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@ -213,6 +213,9 @@ void TextBase::setFontResolution(unsigned int width, unsigned int height)
if (_fontSize==size) return;
_fontSize = size;
assignStateSet();
computeGlyphRepresentation();
}

29
src/osgText/shaders/text_sdf_frag.cpp
View File

@ -1,20 +1,23 @@
char text_sdf_frag[] = "$OSG_GLSL_VERSION\n"
"\n"
"#pragma import_defines( BACKDROP_COLOR, OUTLINE )\n"
"#pragma import_defines( BACKDROP_COLOR, OUTLINE, SIGNED_DISTNACE_FIELD )\n"
"\n"
"#if !defined(GL_ES)\n"
" #if __VERSION__>=400\n"
" #define osg_TextureQueryLOD textureQueryLod\n"
" #define USE_SIGNED_DISTNACE_FIELD\n"
" #else\n"
" #extension GL_ARB_texture_query_lod : enable\n"
" #ifdef GL_ARB_texture_query_lod\n"
" #define osg_TextureQueryLOD textureQueryLOD\n"
" #define USE_SIGNED_DISTNACE_FIELD\n"
"#ifdef SIGNED_DISTNACE_FIELD\n"
"\n"
" #if !defined(GL_ES)\n"
" #if __VERSION__>=400\n"
" #define osg_TextureQueryLOD textureQueryLod\n"
" #define SIGNED_DISTNACE_FIELD_SUPPORTED\n"
" #else\n"
" #extension GL_ARB_texture_query_lod : enable\n"
" #ifdef GL_ARB_texture_query_lod\n"
" #define osg_TextureQueryLOD textureQueryLOD\n"
" #define USE_SIGNED_DISTNACE_FIELD_SUPPORTED\n"
" #endif\n"
" #endif\n"
" #endif\n"
"#endif\n"
"\n"
"#endif\n"
"\n"
"$OSG_PRECISION_FLOAT\n"
"\n"
@ -63,7 +66,7 @@ char text_sdf_frag[] = "$OSG_GLSL_VERSION\n"
" #endif\n"
"}\n"
"\n"
"#ifdef USE_SIGNED_DISTNACE_FIELD\n"
"#ifdef USE_SIGNED_DISTNACE_FIELD_SUPPORTED\n"
"vec4 distanceFieldColor()\n"
"{\n"
" float center_alpha = TEXTURE(glyphTexture, texCoord).r;\n"
@ -115,7 +118,7 @@ char text_sdf_frag[] = "$OSG_GLSL_VERSION\n"
"void main(void)\n"
"{\n"
"\n"
"#ifdef USE_SIGNED_DISTNACE_FIELD\n"
"#ifdef USE_SIGNED_DISTNACE_FIELD_SUPPORTED\n"
"\n"
" float mml = osg_TextureQueryLOD(glyphTexture, texCoord).x;\n"
"\n"