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irrlicht/source/Irrlicht/COpenGLShaderMaterialRenderer.cpp
Vitaliy 9954667c45
Cleanup line endings (#245) 
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git reset --hard origin/master
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2023-10-03 20:37:00 +02:00

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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#include "COpenGLShaderMaterialRenderer.h"
#ifdef _IRR_COMPILE_WITH_OPENGL_
#include "IGPUProgrammingServices.h"
#include "IShaderConstantSetCallBack.h"
#include "IVideoDriver.h"
#include "os.h"
#include "COpenGLDriver.h"
#include "COpenGLCacheHandler.h"
#include "COpenGLMaterialRenderer.h"
namespace irr
{
namespace video
{
//! Constructor
COpenGLShaderMaterialRenderer::COpenGLShaderMaterialRenderer(video::COpenGLDriver* driver,
s32& outMaterialTypeNr, const c8* vertexShaderProgram, const c8* pixelShaderProgram,
IShaderConstantSetCallBack* callback, E_MATERIAL_TYPE baseMaterial, s32 userData)
: Driver(driver), CallBack(callback), Alpha(false), Blending(false), AlphaTest(false),
VertexShader(0), UserData(userData)
{
#ifdef _DEBUG
setDebugName("COpenGLShaderMaterialRenderer");
#endif
PixelShader.set_used(4);
for (u32 i=0; i<4; ++i)
{
PixelShader[i]=0;
}
switch (baseMaterial)
{
case EMT_TRANSPARENT_VERTEX_ALPHA:
case EMT_TRANSPARENT_ALPHA_CHANNEL:
Alpha = true;
break;
case EMT_ONETEXTURE_BLEND:
Blending = true;
break;
case EMT_TRANSPARENT_ALPHA_CHANNEL_REF:
AlphaTest = true;
break;
default:
break;
}
if (CallBack)
CallBack->grab();
init(outMaterialTypeNr, vertexShaderProgram, pixelShaderProgram, EVT_STANDARD);
}
//! constructor only for use by derived classes who want to
//! create a fall back material for example.
COpenGLShaderMaterialRenderer::COpenGLShaderMaterialRenderer(COpenGLDriver* driver,
IShaderConstantSetCallBack* callback,
E_MATERIAL_TYPE baseMaterial, s32 userData)
: Driver(driver), CallBack(callback), Alpha(false), Blending(false), AlphaTest(false),
VertexShader(0), UserData(userData)
{
PixelShader.set_used(4);
for (u32 i=0; i<4; ++i)
{
PixelShader[i]=0;
}
switch (baseMaterial)
{
case EMT_TRANSPARENT_VERTEX_ALPHA:
case EMT_TRANSPARENT_ALPHA_CHANNEL:
Alpha = true;
break;
case EMT_ONETEXTURE_BLEND:
Blending = true;
break;
case EMT_TRANSPARENT_ALPHA_CHANNEL_REF:
AlphaTest = true;
break;
default:
break;
}
if (CallBack)
CallBack->grab();
}
//! Destructor
COpenGLShaderMaterialRenderer::~COpenGLShaderMaterialRenderer()
{
if (CallBack)
CallBack->drop();
if (VertexShader)
Driver->extGlDeletePrograms(1, &VertexShader);
for (u32 i=0; i<PixelShader.size(); ++i)
if (PixelShader[i])
Driver->extGlDeletePrograms(1, &PixelShader[i]);
}
void COpenGLShaderMaterialRenderer::init(s32& outMaterialTypeNr,
const c8* vertexShaderProgram, const c8* pixelShaderProgram,
E_VERTEX_TYPE type)
{
outMaterialTypeNr = -1;
bool success;
// create vertex shader
success=createVertexShader(vertexShaderProgram);
// create pixel shader
if (!createPixelShader(pixelShaderProgram) || !success)
return;
// register as a new material
outMaterialTypeNr = Driver->addMaterialRenderer(this);
}
bool COpenGLShaderMaterialRenderer::OnRender(IMaterialRendererServices* service, E_VERTEX_TYPE vtxtype)
{
// call callback to set shader constants
if (CallBack && (VertexShader || PixelShader[0]))
CallBack->OnSetConstants(service, UserData);
return true;
}
void COpenGLShaderMaterialRenderer::OnSetMaterial(const video::SMaterial& material, const video::SMaterial& lastMaterial,
bool resetAllRenderstates, video::IMaterialRendererServices* services)
{
if (Driver->getFixedPipelineState() == COpenGLDriver::EOFPS_ENABLE)
Driver->setFixedPipelineState(COpenGLDriver::EOFPS_ENABLE_TO_DISABLE);
else
Driver->setFixedPipelineState(COpenGLDriver::EOFPS_DISABLE);
COpenGLCacheHandler* cacheHandler = Driver->getCacheHandler();
if (material.MaterialType != lastMaterial.MaterialType || resetAllRenderstates)
{
if (VertexShader)
{
// set new vertex shader
#ifdef GL_ARB_vertex_program
Driver->extGlBindProgram(GL_VERTEX_PROGRAM_ARB, VertexShader);
glEnable(GL_VERTEX_PROGRAM_ARB);
#elif defined(GL_NV_vertex_program)
Driver->extGlBindProgram(GL_VERTEX_PROGRAM_NV, VertexShader);
glEnable(GL_VERTEX_PROGRAM_NV);
#endif
}
// set new pixel shader
if (PixelShader[0])
{
GLuint nextShader=PixelShader[0];
if (material.FogEnable)
{
GLint curFogMode;
glGetIntegerv(GL_FOG_MODE, &curFogMode);
// if (Driver->LinearFog && PixelShader[1])
if (curFogMode==GL_LINEAR && PixelShader[1])
nextShader=PixelShader[1];
// else if (!Driver->LinearFog && PixelShader[2])
else if (curFogMode==GL_EXP && PixelShader[2])
nextShader=PixelShader[2];
else if (curFogMode==GL_EXP2 && PixelShader[3])
nextShader=PixelShader[3];
}
#ifdef GL_ARB_fragment_program
Driver->extGlBindProgram(GL_FRAGMENT_PROGRAM_ARB, nextShader);
glEnable(GL_FRAGMENT_PROGRAM_ARB);
#elif defined(GL_NV_fragment_program)
Driver->extGlBindProgram(GL_FRAGMENT_PROGRAM_NV, nextShader);
glEnable(GL_FRAGMENT_PROGRAM_NV);
#endif
}
}
Driver->setBasicRenderStates(material, lastMaterial, resetAllRenderstates);
if (Alpha)
{
cacheHandler->setBlend(true);
cacheHandler->setBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
else if (Blending)
{
E_BLEND_FACTOR srcRGBFact,dstRGBFact,srcAlphaFact,dstAlphaFact;
E_MODULATE_FUNC modulate;
u32 alphaSource;
unpack_textureBlendFuncSeparate(srcRGBFact, dstRGBFact, srcAlphaFact, dstAlphaFact, modulate, alphaSource, material.MaterialTypeParam);
if (Driver->queryFeature(EVDF_BLEND_SEPARATE))
{
cacheHandler->setBlendFuncSeparate(Driver->getGLBlend(srcRGBFact), Driver->getGLBlend(dstRGBFact),
Driver->getGLBlend(srcAlphaFact), Driver->getGLBlend(dstAlphaFact));
}
else
{
cacheHandler->setBlendFunc(Driver->getGLBlend(srcRGBFact), Driver->getGLBlend(dstRGBFact));
}
cacheHandler->setBlend(true);
}
else if (AlphaTest)
{
cacheHandler->setAlphaTest(true);
cacheHandler->setAlphaFunc(GL_GREATER, 0.5f);
}
if (CallBack)
CallBack->OnSetMaterial(material);
}
void COpenGLShaderMaterialRenderer::OnUnsetMaterial()
{
// disable vertex shader
#ifdef GL_ARB_vertex_program
if (VertexShader)
glDisable(GL_VERTEX_PROGRAM_ARB);
#elif defined(GL_NV_vertex_program)
if (VertexShader)
glDisable(GL_VERTEX_PROGRAM_NV);
#endif
#ifdef GL_ARB_fragment_program
if (PixelShader[0])
glDisable(GL_FRAGMENT_PROGRAM_ARB);
#elif defined(GL_NV_fragment_program)
if (PixelShader[0])
glDisable(GL_FRAGMENT_PROGRAM_NV);
#endif
COpenGLCacheHandler* cacheHandler = Driver->getCacheHandler();
if (Alpha || Blending)
{
cacheHandler->setBlend(false);
}
else if (AlphaTest)
{
cacheHandler->setAlphaTest(false);
}
}
//! Returns if the material is transparent.
bool COpenGLShaderMaterialRenderer::isTransparent() const
{
return (Alpha || Blending);
}
// This method needs a properly cleaned error state before the checked instruction is called
bool COpenGLShaderMaterialRenderer::checkError(const irr::c8* type)
{
#if defined(GL_ARB_vertex_program) || defined(GL_NV_vertex_program) || defined(GL_ARB_fragment_program) || defined(GL_NV_fragment_program)
GLenum g = glGetError();
if (g == GL_NO_ERROR)
return false;
core::stringc errString = type;
errString += " compilation failed";
errString += " at position ";
GLint errPos=-1;
#if defined(GL_ARB_vertex_program) || defined(GL_ARB_fragment_program)
glGetIntegerv( GL_PROGRAM_ERROR_POSITION_ARB, &errPos );
#else
glGetIntegerv( GL_PROGRAM_ERROR_POSITION_NV, &errPos );
#endif
errString += core::stringc(s32(errPos));
errString += ":\n";
#if defined(GL_ARB_vertex_program) || defined(GL_ARB_fragment_program)
errString += reinterpret_cast<const char*>(glGetString(GL_PROGRAM_ERROR_STRING_ARB));
#else
errString += reinterpret_cast<const char*>(glGetString(GL_PROGRAM_ERROR_STRING_NV));
#endif
#else
core::stringc errString("Shaders not supported.");
#endif
os::Printer::log(errString.c_str(), ELL_ERROR);
return true;
}
bool COpenGLShaderMaterialRenderer::createPixelShader(const c8* pxsh)
{
if (!pxsh)
return true;
const core::stringc inshdr(pxsh);
core::stringc shdr;
const s32 pos = inshdr.find("#_IRR_FOG_MODE_");
const u32 numShaders = (-1 != pos)?4:1;
for (u32 i=0; i<numShaders; ++i)
{
if (i==0)
{
shdr=inshdr;
}
else
{
shdr = inshdr.subString(0, pos);
switch (i) {
case 1: shdr += "OPTION ARB_fog_linear;"; break;
case 2: shdr += "OPTION ARB_fog_exp;"; break;
case 3: shdr += "OPTION ARB_fog_exp2;"; break;
}
shdr += inshdr.subString(pos+16, inshdr.size()-pos-16);
}
Driver->extGlGenPrograms(1, &PixelShader[i]);
#ifdef GL_ARB_fragment_program
Driver->extGlBindProgram(GL_FRAGMENT_PROGRAM_ARB, PixelShader[i]);
#elif defined GL_NV_fragment_program
Driver->extGlBindProgram(GL_FRAGMENT_PROGRAM_NV, PixelShader[i]);
#endif
// clear error buffer
while(glGetError() != GL_NO_ERROR)
{}
#ifdef GL_ARB_fragment_program
// compile
Driver->extGlProgramString(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
shdr.size(), shdr.c_str());
#elif defined GL_NV_fragment_program
Driver->extGlLoadProgram(GL_FRAGMENT_PROGRAM_NV, PixelShader[i],
shdr.size(), shdr.c_str());
#endif
if (checkError("Pixel shader"))
{
Driver->extGlDeletePrograms(1, &PixelShader[i]);
PixelShader[i]=0;
return false;
}
}
return true;
}
bool COpenGLShaderMaterialRenderer::createVertexShader(const c8* vtxsh)
{
if (!vtxsh)
return true;
Driver->extGlGenPrograms(1, &VertexShader);
#ifdef GL_ARB_vertex_program
Driver->extGlBindProgram(GL_VERTEX_PROGRAM_ARB, VertexShader);
#elif defined GL_NV_vertex_program
Driver->extGlBindProgram(GL_VERTEX_PROGRAM_NV, VertexShader);
#endif
// clear error buffer
while(glGetError() != GL_NO_ERROR)
{}
// compile
#ifdef GL_ARB_vertex_program
Driver->extGlProgramString(GL_VERTEX_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
(GLsizei)strlen(vtxsh), vtxsh);
#elif defined GL_NV_vertex_program
Driver->extGlLoadProgram(GL_VERTEX_PROGRAM_NV, VertexShader,
(GLsizei)strlen(vtxsh), vtxsh);
#endif
if (checkError("Vertex shader"))
{
Driver->extGlDeletePrograms(1, &VertexShader);
VertexShader=0;
return false;
}
return true;
}
} // end namespace video
} // end namespace irr
#endif
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