FGFS-4.1/OpenSceneGraph
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Added support for using glGenerateMipmap instead of GL_GENERATE_MIPMAP_SGIS on GLES2

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This commit is contained in:
Robert Osfield 2012-02-24 12:15:15 +00:00
parent 3ca30736b4
commit c3fb8dc714
1 changed files with 30 additions and 2 deletions
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32
src/osgText/Glyph.cpp
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@ -155,6 +155,23 @@ void GlyphTexture::apply(osg::State& state) const
bool newTextureObject = (textureObject == 0);
#if defined(OSG_GLES2_AVAILABLE)
bool requiresGenerateMipmapCall = false;
// need to look to see generate mip map call is required.
switch(_min_filter)
{
case NEAREST_MIPMAP_NEAREST:
case NEAREST_MIPMAP_LINEAR:
case LINEAR_MIPMAP_NEAREST:
case LINEAR_MIPMAP_LINEAR:
requiresGenerateMipmapCall = generateMipMapSupported;
break;
default:
break;
}
#endif
if (newTextureObject)
{
GLint maxTextureSize = 256;
@ -177,7 +194,6 @@ void GlyphTexture::apply(osg::State& state) const
applyTexParameters(GL_TEXTURE_2D,state);
// need to look at generate mip map extension if mip mapping required.
switch(_min_filter)
{
@ -187,7 +203,9 @@ void GlyphTexture::apply(osg::State& state) const
case LINEAR_MIPMAP_LINEAR:
if (generateMipMapSupported)
{
#if !defined(OSG_GLES2_AVAILABLE)
glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS,GL_TRUE);
#endif
}
else glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, LINEAR);
break;
@ -274,7 +292,13 @@ void GlyphTexture::apply(osg::State& state) const
{
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_mutex);
if (!s_subloadAllGlyphsTogether)
bool subloadAllGlyphsTogether = s_subloadAllGlyphsTogether;
#if defined(OSG_GLES2_AVAILABLE)
if (requiresGenerateMipmapCall) subloadAllGlyphsTogether = true;
#endif
if (!subloadAllGlyphsTogether)
{
if (newTextureObject)
{
@ -349,6 +373,10 @@ void GlyphTexture::apply(osg::State& state) const
getTextureHeight(),
GL_ALPHA, GL_UNSIGNED_BYTE, local_data );
#if defined(OSG_GLES2_AVAILABLE)
if (requiresGenerateMipmapCall) glGenerateMipmap(GL_TEXTURE_2D);
#endif
delete [] local_data;
}