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// Geometric Tools, LLC
// Copyright (c) 1998-2014
// Distributed under the Boost Software License, Version 1.0.
// http://www.boost.org/LICENSE_1_0.txt
// http://www.geometrictools.com/License/Boost/LICENSE_1_0.txt
//
// File Version: 5.0.0 (2010/01/01)
#include "Wm5GraphicsPCH.h"
#include "Wm5OpenGLVertexShader.h"
#include "Wm5Renderer.h"
using namespace Wm5;
//----------------------------------------------------------------------------
PdrVertexShader::PdrVertexShader (Renderer*, const VertexShader* vshader)
{
const char* programText =
vshader->GetProgram(VertexShader::GetProfile())->c_str();
int programLength = (int)strlen(programText);
glEnable(GL_VERTEX_PROGRAM_ARB);
glGenProgramsARB(1, &mShader);
glBindProgramARB(GL_VERTEX_PROGRAM_ARB, mShader);
glProgramStringARB(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
programLength, programText);
glDisable(GL_VERTEX_PROGRAM_ARB);
}
//----------------------------------------------------------------------------
PdrVertexShader::~PdrVertexShader ()
{
glDeleteProgramsARB(1, &mShader);
}
//----------------------------------------------------------------------------
void PdrVertexShader::Enable (Renderer* renderer,
const VertexShader* vshader, const ShaderParameters* parameters)
{
// Enable the buffer by setting the state.
glEnable(GL_VERTEX_PROGRAM_ARB);
glBindProgramARB(GL_VERTEX_PROGRAM_ARB, mShader);
// Set the shader constants.
int profile = VertexShader::GetProfile();
const int numConstants = vshader->GetNumConstants();
for (int i = 0; i < numConstants; ++i)
{
const int numRegisters = vshader->GetNumRegistersUsed(i);
const float* data = parameters->GetConstant(i)->GetData();
int baseRegister = vshader->GetBaseRegister(profile, i);
for (int j = 0; j < numRegisters; ++j)
{
glProgramLocalParameter4fvARB(GL_VERTEX_PROGRAM_ARB,
(GLuint)baseRegister, data);
baseRegister++;
data += 4;
}
}
SetSamplerState(renderer, vshader, profile, parameters,
renderer->mData->mMaxVShaderImages, renderer->mData->mCurrentSS);
}
//----------------------------------------------------------------------------
void PdrVertexShader::Disable (Renderer* renderer,
const VertexShader* vshader, const ShaderParameters* parameters)
{
glDisable(GL_VERTEX_PROGRAM_ARB);
int profile = VertexShader::GetProfile();
DisableTextures(renderer, vshader, profile, parameters,
renderer->mData->mMaxVShaderImages);
}
//----------------------------------------------------------------------------
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