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From Aurelien Albert, "This submission allow the user to specify how to setup VertexAttributeAliasing.

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I think this is necessary on OpenGL 3.2+ since this is no more "default" locations in the OpenGL specs.

The default behaviour stay the same.

There is a few new methods on osg::State :

- resetVertexAttributeAlias : reset all vertex alias to osg's default ones
- set**Alias : set a vertex attribute alias configuration
- setAttributeBindingList : set the attribute binding list (allow to specify an empty list if you're using "layout" qualifier in glsl code to specify the bindings. This save some CPU operations)"
This commit is contained in:
Robert Osfield
2013-06-26 13:00:12 +00:00
parent 831a552dfa
commit bead0740f2
2 changed files with 80 additions and 56 deletions
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113
src/osg/State.cpp
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@@ -67,47 +67,7 @@ State::State():
_modelViewProjectionMatrixUniform = new Uniform(Uniform::FLOAT_MAT4,"osg_ModelViewProjectionMatrix");
_normalMatrixUniform = new Uniform(Uniform::FLOAT_MAT3,"osg_NormalMatrix");
bool compactAliasing = true;
if (compactAliasing)
{
setUpVertexAttribAlias(_vertexAlias,0, "gl_Vertex","osg_Vertex","attribute vec4 ");
setUpVertexAttribAlias(_normalAlias, 1, "gl_Normal","osg_Normal","attribute vec3 ");
setUpVertexAttribAlias(_colorAlias, 2, "gl_Color","osg_Color","attribute vec4 ");
_texCoordAliasList.resize(5);
for(unsigned int i=0; i<_texCoordAliasList.size(); i++)
{
std::stringstream gl_MultiTexCoord;
std::stringstream osg_MultiTexCoord;
gl_MultiTexCoord<<"gl_MultiTexCoord"<<i;
osg_MultiTexCoord<<"osg_MultiTexCoord"<<i;
setUpVertexAttribAlias(_texCoordAliasList[i], 3+i, gl_MultiTexCoord.str(), osg_MultiTexCoord.str(), "attribute vec4 ");
}
setUpVertexAttribAlias(_secondaryColorAlias, 6, "gl_SecondaryColor","osg_SecondaryColor","attribute vec4 ");
setUpVertexAttribAlias(_fogCoordAlias, 7, "gl_FogCoord","osg_FogCoord","attribute float ");
}
else
{
setUpVertexAttribAlias(_vertexAlias,0, "gl_Vertex","osg_Vertex","attribute vec4 ");
setUpVertexAttribAlias(_normalAlias, 2, "gl_Normal","osg_Normal","attribute vec3 ");
setUpVertexAttribAlias(_colorAlias, 3, "gl_Color","osg_Color","attribute vec4 ");
setUpVertexAttribAlias(_secondaryColorAlias, 4, "gl_SecondaryColor","osg_SecondaryColor","attribute vec4 ");
setUpVertexAttribAlias(_fogCoordAlias, 5, "gl_FogCoord","osg_FogCoord","attribute float ");
_texCoordAliasList.resize(8);
for(unsigned int i=0; i<_texCoordAliasList.size(); i++)
{
std::stringstream gl_MultiTexCoord;
std::stringstream osg_MultiTexCoord;
gl_MultiTexCoord<<"gl_MultiTexCoord"<<i;
osg_MultiTexCoord<<"osg_MultiTexCoord"<<i;
setUpVertexAttribAlias(_texCoordAliasList[i], 8+i, gl_MultiTexCoord.str(), osg_MultiTexCoord.str(), "attribute vec4 ");
}
}
resetVertexAttributeAlias();
_abortRenderingPtr = NULL;
@@ -848,6 +808,53 @@ Polytope State::getViewFrustum() const
}
void State::resetVertexAttributeAlias(bool compactAliasing)
{
_texCoordAliasList.clear();
_attributeBindingList.clear();
if (compactAliasing)
{
setUpVertexAttribAlias(_vertexAlias,0, "gl_Vertex","osg_Vertex","attribute vec4 ");
setUpVertexAttribAlias(_normalAlias, 1, "gl_Normal","osg_Normal","attribute vec3 ");
setUpVertexAttribAlias(_colorAlias, 2, "gl_Color","osg_Color","attribute vec4 ");
_texCoordAliasList.resize(5);
for(unsigned int i=0; i<_texCoordAliasList.size(); i++)
{
std::stringstream gl_MultiTexCoord;
std::stringstream osg_MultiTexCoord;
gl_MultiTexCoord<<"gl_MultiTexCoord"<<i;
osg_MultiTexCoord<<"osg_MultiTexCoord"<<i;
setUpVertexAttribAlias(_texCoordAliasList[i], 3+i, gl_MultiTexCoord.str(), osg_MultiTexCoord.str(), "attribute vec4 ");
}
setUpVertexAttribAlias(_secondaryColorAlias, 6, "gl_SecondaryColor","osg_SecondaryColor","attribute vec4 ");
setUpVertexAttribAlias(_fogCoordAlias, 7, "gl_FogCoord","osg_FogCoord","attribute float ");
}
else
{
setUpVertexAttribAlias(_vertexAlias,0, "gl_Vertex","osg_Vertex","attribute vec4 ");
setUpVertexAttribAlias(_normalAlias, 2, "gl_Normal","osg_Normal","attribute vec3 ");
setUpVertexAttribAlias(_colorAlias, 3, "gl_Color","osg_Color","attribute vec4 ");
setUpVertexAttribAlias(_secondaryColorAlias, 4, "gl_SecondaryColor","osg_SecondaryColor","attribute vec4 ");
setUpVertexAttribAlias(_fogCoordAlias, 5, "gl_FogCoord","osg_FogCoord","attribute float ");
_texCoordAliasList.resize(8);
for(unsigned int i=0; i<_texCoordAliasList.size(); i++)
{
std::stringstream gl_MultiTexCoord;
std::stringstream osg_MultiTexCoord;
gl_MultiTexCoord<<"gl_MultiTexCoord"<<i;
osg_MultiTexCoord<<"osg_MultiTexCoord"<<i;
setUpVertexAttribAlias(_texCoordAliasList[i], 8+i, gl_MultiTexCoord.str(), osg_MultiTexCoord.str(), "attribute vec4 ");
}
}
}
void State::disableAllVertexArrays()
{
@@ -1313,20 +1320,16 @@ bool State::convertVertexShaderSourceToOsgBuiltIns(std::string& source) const
declPos = 0;
}
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_Normal", "osg_Normal", "attribute vec3 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_Vertex", "osg_Vertex", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_Color", "osg_Color", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_SecondaryColor", "osg_SecondaryColor", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_FogCoord", "osg_FogCoord", "attribute float ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_MultiTexCoord0", "osg_MultiTexCoord0", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_MultiTexCoord1", "osg_MultiTexCoord1", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_MultiTexCoord2", "osg_MultiTexCoord2", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_MultiTexCoord3", "osg_MultiTexCoord3", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_MultiTexCoord4", "osg_MultiTexCoord4", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_MultiTexCoord5", "osg_MultiTexCoord5", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_MultiTexCoord6", "osg_MultiTexCoord6", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_MultiTexCoord7", "osg_MultiTexCoord7", "attribute vec4 ");
State_Utils::replaceAndInsertDeclaration(source, declPos, _vertexAlias._glName, _vertexAlias._osgName, _vertexAlias._declaration);
State_Utils::replaceAndInsertDeclaration(source, declPos, _normalAlias._glName, _normalAlias._osgName, _normalAlias._declaration);
State_Utils::replaceAndInsertDeclaration(source, declPos, _colorAlias._glName, _colorAlias._osgName, _colorAlias._declaration);
State_Utils::replaceAndInsertDeclaration(source, declPos, _secondaryColorAlias._glName, _secondaryColorAlias._osgName, _secondaryColorAlias._declaration);
State_Utils::replaceAndInsertDeclaration(source, declPos, _fogCoordAlias._glName, _fogCoordAlias._osgName, _fogCoordAlias._declaration);
for (size_t i=0; i<_texCoordAliasList.size(); i++)
{
const VertexAttribAlias& texCoordAlias = _texCoordAliasList[i];
State_Utils::replaceAndInsertDeclaration(source, declPos, texCoordAlias._glName, texCoordAlias._osgName, texCoordAlias._declaration);
}
// replace built in uniform
State_Utils::replaceAndInsertDeclaration(source, declPos, "gl_ModelViewMatrix", "osg_ModelViewMatrix", "uniform mat4 ");