//-----------------------------------------------------------------------
GLSLLinkProgram::GLSLLinkProgram(GLSLGpuProgram* vertexProgram, GLSLGpuProgram* geometryProgram, GLSLGpuProgram* fragmentProgram)
: mVertexProgram(vertexProgram)
, mGeometryProgram(geometryProgram)
, mFragmentProgram(fragmentProgram)
, mUniformRefsBuilt(false)
, mLinked(false)
{
//checkForGLSLError( "GLSLLinkProgram::GLSLLinkProgram", "Error prior to Creating GLSL Program Object", 0);
glGetError(); //Clean up the error. Otherwise will flood log.
mGLHandle = glCreateProgramObjectARB();
checkForGLSLError( "GLSLLinkProgram::GLSLLinkProgram", "Error Creating GLSL Program Object", 0 );
// tell shaders to attach themselves to the LinkProgram
// let the shaders do the attaching since they may have several children to attach
if (mVertexProgram)
{
mVertexProgram->getGLSLProgram()->attachToProgramObject(mGLHandle);
setSkeletalAnimationIncluded(mVertexProgram->isSkeletalAnimationIncluded());
}
if (mGeometryProgram)
{
mGeometryProgram->getGLSLProgram()->attachToProgramObject(mGLHandle);
//Don't set adjacency flag. We handle it internally and expose "false"
}
if (mFragmentProgram)
{
mFragmentProgram->getGLSLProgram()->attachToProgramObject(mGLHandle);
}
}
//-----------------------------------------------------------------------
void GLSLProgram::attachToProgramObject( const GLhandleARB programObject )
{
glAttachObjectARB( programObject, mGLHandle );
checkForGLSLError( "GLSLLinkProgram::GLSLLinkProgram",
"Error attaching " + mName + " shader object to GLSL Program Object", programObject );
// attach child objects
GLSLProgramContainerIterator childprogramcurrent = mAttachedGLSLPrograms.begin();
GLSLProgramContainerIterator childprogramend = mAttachedGLSLPrograms.end();
while (childprogramcurrent != childprogramend)
{
GLSLProgram* childShader = *childprogramcurrent;
// bug in ATI GLSL linker : modules without main function must be recompiled each time
// they are linked to a different program object
// don't check for compile errors since there won't be any
// *** minor inconvenience until ATI fixes there driver
childShader->compile(false);
childShader->attachToProgramObject( programObject );
++childprogramcurrent;
}
}
//-----------------------------------------------------------------------
void GLSLProgram::loadFromSource(void)
{
// only create a shader object if glsl is supported
if (isSupported())
{
checkForGLSLError( "GLSLProgram::GLSLProgram", "GL Errors before creating shader object", 0 );
// create shader object
mGLHandle = glCreateShaderObjectARB(
(mType == GPT_VERTEX_PROGRAM) ? GL_VERTEX_SHADER_ARB : GL_FRAGMENT_SHADER_ARB );
checkForGLSLError( "GLSLProgram::GLSLProgram", "Error creating GLSL shader Object", 0 );
}
const char* SLSource = mSource.c_str();
glShaderSourceARB(mGLHandle, 1, &SLSource, NULL);
// check for load errors
checkForGLSLError( "GLSLProgram::loadFromSource", "Cannot load GLSL high-level shader source : " + mName, 0 );
compile();
}
//---------------------------------------------------------------------------
bool GLSLProgram::compile(const bool checkErrors)
{
glCompileShaderARB(mGLHandle);
// check for compile errors
glGetObjectParameterivARB(mGLHandle, GL_OBJECT_COMPILE_STATUS_ARB, &mCompiled);
// force exception if not compiled
if (checkErrors)
{
checkForGLSLError( "GLSLProgram::loadFromSource", "Cannot compile GLSL high-level shader : " + mName + " ", mGLHandle, !mCompiled, !mCompiled );
if (mCompiled)
{
logObjectInfo( mName + " : GLSL compiled ", mGLHandle );
}
}
return (mCompiled == 1);
}
//-----------------------------------------------------------------------
void GLSLLinkProgram::updateUniforms(GpuProgramParametersSharedPtr params,
uint16 mask, GpuProgramType fromProgType)
{
// iterate through uniform reference list and update uniform values
GLUniformReferenceIterator currentUniform = mGLUniformReferences.begin();
GLUniformReferenceIterator endUniform = mGLUniformReferences.end();
for (; currentUniform != endUniform; ++currentUniform)
{
// Only pull values from buffer it's supposed to be in (vertex or fragment)
// This method will be called twice, once for vertex program params,
// and once for fragment program params.
if (fromProgType == currentUniform->mSourceProgType)
{
const GpuConstantDefinition* def = currentUniform->mConstantDef;
if (def->variability & mask)
{
GLsizei glArraySize = (GLsizei)def->arraySize;
// get the index in the parameter real list
switch (def->constType)
{
case GCT_FLOAT1:
glUniform1fvARB(currentUniform->mLocation, glArraySize,
params->getFloatPointer(def->physicalIndex));
break;
case GCT_FLOAT2:
glUniform2fvARB(currentUniform->mLocation, glArraySize,
params->getFloatPointer(def->physicalIndex));
break;
case GCT_FLOAT3:
glUniform3fvARB(currentUniform->mLocation, glArraySize,
params->getFloatPointer(def->physicalIndex));
break;
case GCT_FLOAT4:
glUniform4fvARB(currentUniform->mLocation, glArraySize,
params->getFloatPointer(def->physicalIndex));
break;
case GCT_MATRIX_2X2:
glUniformMatrix2fvARB(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
break;
case GCT_MATRIX_2X3:
if (GLEW_VERSION_2_1)
{
glUniformMatrix2x3fv(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
}
break;
case GCT_MATRIX_2X4:
if (GLEW_VERSION_2_1)
{
glUniformMatrix2x4fv(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
}
break;
case GCT_MATRIX_3X2:
if (GLEW_VERSION_2_1)
{
glUniformMatrix3x2fv(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
}
break;
case GCT_MATRIX_3X3:
glUniformMatrix3fvARB(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
break;
case GCT_MATRIX_3X4:
if (GLEW_VERSION_2_1)
{
glUniformMatrix3x4fv(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
}
break;
case GCT_MATRIX_4X2:
if (GLEW_VERSION_2_1)
{
glUniformMatrix4x2fv(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
}
break;
case GCT_MATRIX_4X3:
if (GLEW_VERSION_2_1)
{
glUniformMatrix4x3fv(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
}
break;
case GCT_MATRIX_4X4:
glUniformMatrix4fvARB(currentUniform->mLocation, glArraySize,
GL_TRUE, params->getFloatPointer(def->physicalIndex));
break;
case GCT_INT1:
glUniform1ivARB(currentUniform->mLocation, glArraySize,
(GLint*)params->getIntPointer(def->physicalIndex));
break;
case GCT_INT2:
glUniform2ivARB(currentUniform->mLocation, glArraySize,
(GLint*)params->getIntPointer(def->physicalIndex));
break;
case GCT_INT3:
glUniform3ivARB(currentUniform->mLocation, glArraySize,
(GLint*)params->getIntPointer(def->physicalIndex));
break;
case GCT_INT4:
glUniform4ivARB(currentUniform->mLocation, glArraySize,
(GLint*)params->getIntPointer(def->physicalIndex));
break;
case GCT_SAMPLER1D:
case GCT_SAMPLER1DSHADOW:
case GCT_SAMPLER2D:
case GCT_SAMPLER2DSHADOW:
case GCT_SAMPLER3D:
case GCT_SAMPLERCUBE:
// samplers handled like 1-element ints
glUniform1ivARB(currentUniform->mLocation, 1,
(GLint*)params->getIntPointer(def->physicalIndex));
break;
case GCT_UNKNOWN:
break;
} // end switch
#if OGRE_DEBUG_MODE
checkForGLSLError( "GLSLLinkProgram::updateUniforms", "Error updating uniform", 0 );
#endif
} // variability & mask
} // fromProgType == currentUniform->mSourceProgType
} // end for
}
//-----------------------------------------------------------------------
void GLSLLinkProgram::activate(void)
{
if (!mLinked)
{
if (mVertexProgram)
{
// Some drivers (e.g. OS X on nvidia) incorrectly determine the attribute binding automatically
// and end up aliasing existing built-ins. So avoid!
// Bind all used attribs - not all possible ones otherwise we'll get
// lots of warnings in the log, and also may end up aliasing names used
// as varyings by accident
// Because we can't ask GL whether an attribute is used in the shader
// until it is linked (chicken and egg!) we have to parse the source
size_t numAttribs = sizeof(msCustomAttributes)/sizeof(CustomAttribute);
const String& vpSource = mVertexProgram->getGLSLProgram()->getSource();
for (size_t i = 0; i < numAttribs; ++i)
{
const CustomAttribute& a = msCustomAttributes[i];
// we're looking for either:
// attribute vec<n> <semantic_name>
// in vec<n> <semantic_name>
// The latter is recommended in GLSL 1.3 onwards
// be slightly flexible about formatting
String::size_type pos = vpSource.find(a.name);
if (pos != String::npos)
{
String::size_type startpos = vpSource.find("attribute", pos < 20 ? 0 : pos-20);
if (startpos == String::npos)
startpos = vpSource.find("in", pos-20);
if (startpos != String::npos && startpos < pos)
{
// final check
String expr = vpSource.substr(startpos, pos + a.name.length() - startpos);
StringVector vec = StringUtil::split(expr);
if ((vec[0] == "in" || vec[0] == "attribute") && vec[2] == a.name)
glBindAttribLocationARB(mGLHandle, a.attrib, a.name.c_str());
}
}
}
}
if (mGeometryProgram)
{
RenderOperation::OperationType inputOperationType = mGeometryProgram->getGLSLProgram()->getInputOperationType();
glProgramParameteriEXT(mGLHandle,GL_GEOMETRY_INPUT_TYPE_EXT,
getGLGeometryInputPrimitiveType(inputOperationType, mGeometryProgram->isAdjacencyInfoRequired()));
RenderOperation::OperationType outputOperationType = mGeometryProgram->getGLSLProgram()->getOutputOperationType();
switch (outputOperationType)
{
case RenderOperation::OT_POINT_LIST:
case RenderOperation::OT_LINE_STRIP:
case RenderOperation::OT_TRIANGLE_STRIP:
case RenderOperation::OT_LINE_LIST:
case RenderOperation::OT_TRIANGLE_LIST:
case RenderOperation::OT_TRIANGLE_FAN:
break;
}
glProgramParameteriEXT(mGLHandle,GL_GEOMETRY_OUTPUT_TYPE_EXT,
getGLGeometryOutputPrimitiveType(outputOperationType));
glProgramParameteriEXT(mGLHandle,GL_GEOMETRY_VERTICES_OUT_EXT,
mGeometryProgram->getGLSLProgram()->getMaxOutputVertices());
}
glLinkProgramARB( mGLHandle );
glGetObjectParameterivARB( mGLHandle, GL_OBJECT_LINK_STATUS_ARB, &mLinked );
// force logging and raise exception if not linked
checkForGLSLError( "GLSLLinkProgram::Activate",
"Error linking GLSL Program Object : ", mGLHandle, !mLinked, !mLinked );
if(mLinked)
{
logObjectInfo( String("GLSL link result : "), mGLHandle );
buildGLUniformReferences();
extractAttributes();
}
}
if (mLinked)
{
checkForGLSLError( "GLSLLinkProgram::Activate",
"Error prior to using GLSL Program Object : ", mGLHandle, false, false);
glUseProgramObjectARB( mGLHandle );
checkForGLSLError( "GLSLLinkProgram::Activate",
"Error using GLSL Program Object : ", mGLHandle, false, false);
}
}
void GLSLGpuProgram::initialize()
{
#if BS_OPENGL_4_5
static const char* VERSION_CHARS = "450";
#elif BS_OPENGL_4_4
static const char* VERSION_CHARS = "440";
#elif BS_OPENGL_4_3
static const char* VERSION_CHARS = "430";
#elif BS_OPENGL_4_2
static const char* VERSION_CHARS = "420";
#else
static const char* VERSION_CHARS = "410";
#endif
if (!isSupported())
{
mIsCompiled = false;
mCompileMessages = "Specified GPU program type is not supported by the current render system.";
GpuProgram::initialize();
return;
}
GLenum shaderType = 0x0000;
switch (mType)
{
case GPT_VERTEX_PROGRAM:
shaderType = GL_VERTEX_SHADER;
mProgramID = ++sVertexShaderCount;
break;
case GPT_FRAGMENT_PROGRAM:
shaderType = GL_FRAGMENT_SHADER;
mProgramID = ++sFragmentShaderCount;
break;
#if BS_OPENGL_4_1 || BS_OPENGLES_3_2
case GPT_GEOMETRY_PROGRAM:
shaderType = GL_GEOMETRY_SHADER;
mProgramID = ++sGeometryShaderCount;
break;
case GPT_HULL_PROGRAM:
shaderType = GL_TESS_CONTROL_SHADER;
mProgramID = ++sDomainShaderCount;
break;
case GPT_DOMAIN_PROGRAM:
shaderType = GL_TESS_EVALUATION_SHADER;
mProgramID = ++sHullShaderCount;
break;
#endif
#if BS_OPENGL_4_3 || BS_OPENGLES_3_1
case GPT_COMPUTE_PROGRAM:
shaderType = GL_COMPUTE_SHADER;
mProgramID = ++sComputeShaderCount;
break;
#endif
default:
break;
}
// Add preprocessor extras and main source
const String& source = mSource;
if (!source.empty())
{
Vector<GLchar*> lines;
const char* versionStr = "#version ";
UINT32 versionStrLen = (UINT32)strlen(versionStr);
UINT32 lineLength = 0;
INT32 versionLineNum = -1;
for (UINT32 i = 0; i < source.size(); i++)
{
if (source[i] == '\n' || source[i] == '\r')
{
assert(sizeof(source[i]) == sizeof(GLchar));
GLchar* lineData = (GLchar*)bs_stack_alloc(sizeof(GLchar) * (lineLength + 2));
memcpy(lineData, &source[i - lineLength], sizeof(GLchar) * lineLength);
lineData[lineLength] = '\n';
lineData[lineLength + 1] = '\0';
if(versionLineNum == -1 && lineLength >= versionStrLen)
{
bool isEqual = true;
for (UINT32 j = 0; j < versionStrLen; ++j)
{
if(lineData[j] != versionStr[j])
{
isEqual = false;
break;
}
}
if (isEqual)
versionLineNum = (INT32)lines.size();
}
lines.push_back(lineData);
lineLength = 0;
}
else
{
lineLength++;
}
}
if (lineLength > 0)
{
UINT32 end = (UINT32)source.size() - 1;
assert(sizeof(source[end]) == sizeof(GLchar));
GLchar* lineData = (GLchar*)bs_stack_alloc(sizeof(GLchar) * (lineLength + 1));
memcpy(lineData, &source[source.size() - lineLength], sizeof(GLchar) * lineLength);
lineData[lineLength] = '\0';
lines.push_back(lineData);
lineLength = 0;
}
int numInsertedLines = 0;
if(versionLineNum == -1)
{
char versionLine[50];
strcpy(versionLine, "#version ");
strcat(versionLine, VERSION_CHARS);
strcat(versionLine, "\n");
UINT32 length = (UINT32)strlen(versionLine) + 1;
GLchar* extraLineData = (GLchar*)bs_stack_alloc(length);
memcpy(extraLineData, versionLine, length);
lines.insert(lines.begin(), extraLineData);
numInsertedLines++;
}
char versionDefine[50];
strcpy(versionDefine, "#define OPENGL");
strcat(versionDefine, VERSION_CHARS);
strcat(versionDefine, "\n");
const char* EXTRA_LINES[] =
{
"#define OPENGL\n",
versionDefine
};
UINT32 numExtraLines = sizeof(EXTRA_LINES) / sizeof(EXTRA_LINES[0]);
UINT32 extraLineOffset = versionLineNum != -1 ? versionLineNum + 1 : 0;
for (UINT32 i = 0; i < numExtraLines; i++)
{
UINT32 length = (UINT32)strlen(EXTRA_LINES[i]) + 1;
GLchar* extraLineData = (GLchar*)bs_stack_alloc(length);
memcpy(extraLineData, EXTRA_LINES[i], length);
lines.insert(lines.begin() + extraLineOffset + numInsertedLines, extraLineData);
numInsertedLines++;
}
StringStream codeStream;
for(auto& entry : lines)
codeStream << entry;
for (INT32 i = numInsertedLines - 1; i >= 0; i--)
bs_stack_free(lines[extraLineOffset + i]);
if (numInsertedLines > 0)
lines.erase(lines.begin() + extraLineOffset, lines.begin() + extraLineOffset + numInsertedLines);
for (auto iter = lines.rbegin(); iter != lines.rend(); ++iter)
bs_stack_free(*iter);
String code = codeStream.str();
const char* codeRaw = code.c_str();
mGLHandle = glCreateShaderProgramv(shaderType, 1, (const GLchar**)&codeRaw);
BS_CHECK_GL_ERROR();
mCompileMessages = "";
mIsCompiled = !checkForGLSLError(mGLHandle, mCompileMessages);
}
if (mIsCompiled)
{
GLSLParamParser paramParser;
paramParser.buildUniformDescriptions(mGLHandle, mType, *mParametersDesc);
if (mType == GPT_VERTEX_PROGRAM)
{
Vector<VertexElement> elementList = paramParser.buildVertexDeclaration(mGLHandle);
mInputDeclaration = HardwareBufferManager::instance().createVertexDeclaration(elementList);
}
}
BS_INC_RENDER_STAT_CAT(ResCreated, RenderStatObject_GpuProgram);
GpuProgram::initialize();
}