+
+//! Return GLSL shader stage file extension.
+static const char* getShaderExtension (GLenum theType)
+{
+ switch (theType)
+ {
+ case GL_VERTEX_SHADER: return ".vs";
+ case GL_FRAGMENT_SHADER: return ".fs";
+ case GL_GEOMETRY_SHADER: return ".gs";
+ case GL_TESS_CONTROL_SHADER: return ".tcs";
+ case GL_TESS_EVALUATION_SHADER: return ".tes";
+ case GL_COMPUTE_SHADER: return ".cs";
+ }
+ return ".glsl";
+}
+
+//! Expand substring with additional tail.
+static void insertSubString (TCollection_AsciiString& theString,
+ const char& thePattern,
+ const TCollection_AsciiString& theSubstitution)
+{
+ const int aSubLen = theSubstitution.Length();
+ for (int aCharIter = 1, aNbChars = theString.Length(); aCharIter <= aNbChars; ++aCharIter)
+ {
+ if (theString.Value (aCharIter) == thePattern)
+ {
+ theString.Insert (aCharIter + 1, theSubstitution);
+ aCharIter += aSubLen;
+ aNbChars += aSubLen;
+ }
+ }
+}
+
+//! Dump GLSL shader source code into file.
+static bool dumpShaderSource (const TCollection_AsciiString& theFileName,
+ const TCollection_AsciiString& theSource,
+ bool theToBeautify)
+{
+ OSD_File aFile (theFileName);
+ aFile.Build (OSD_WriteOnly, OSD_Protection());
+ TCollection_AsciiString aSource = theSource;
+ if (theToBeautify)
+ {
+ insertSubString (aSource, ';', "\n");
+ insertSubString (aSource, '{', "\n");
+ insertSubString (aSource, '}', "\n");
+ }
+ if (!aFile.IsOpen())
+ {
+ Message::DefaultMessenger()->Send (TCollection_AsciiString("Error: File '") + theFileName + "' cannot be opened to save shader", Message_Fail);
+ return false;
+ }
+
+ if (aSource.Length() > 0)
+ {
+ aFile.Write (aSource.ToCString(), aSource.Length());
+ }
+ aFile.Close();
+ Message::DefaultMessenger()->Send (TCollection_AsciiString ("Shader source dumped into '") + theFileName + "'", Message_Warning);
+ return true;
+}
+
+//! Read GLSL shader source code from file dump.
+static bool restoreShaderSource (TCollection_AsciiString& theSource,
+ const TCollection_AsciiString& theFileName)
+{
+ OSD_File aFile (theFileName);
+ aFile.Open (OSD_ReadOnly, OSD_Protection());
+ if (!aFile.IsOpen())
+ {
+ Message::DefaultMessenger()->Send (TCollection_AsciiString ("File '") + theFileName + "' cannot be opened to load shader", Message_Fail);
+ return false;
+ }
+
+ const Standard_Integer aSize = (Standard_Integer )aFile.Size();
+ if (aSize > 0)
+ {
+ theSource = TCollection_AsciiString (aSize, '\0');
+ aFile.Read (theSource, aSize);
+ }
+ aFile.Close();
+ Message::DefaultMessenger()->Send (TCollection_AsciiString ("Restored shader dump from '") + theFileName + "'", Message_Warning);
+ return true;
+}
+
+// =======================================================================
+// function : updateDebugDump
+// purpose :
+// =======================================================================
+Standard_Boolean OpenGl_ShaderObject::updateDebugDump (const Handle(OpenGl_Context)& theCtx,
+ const TCollection_AsciiString& theProgramId,
+ const TCollection_AsciiString& theFolder,
+ Standard_Boolean theToBeautify,
+ Standard_Boolean theToReset)
+{
+ const TCollection_AsciiString aFileName = theFolder + "/" + theProgramId + getShaderExtension (myType);
+ if (!theToReset)
+ {
+ OSD_File aFile (aFileName);
+ if (aFile.Exists())
+ {
+ const Quantity_Date aDate = aFile.AccessMoment();
+ if (aDate > myDumpDate)
+ {
+ TCollection_AsciiString aNewSource;
+ if (restoreShaderSource (aNewSource, aFileName))
+ {
+ LoadAndCompile (theCtx, aNewSource);
+ return Standard_True;
+ }
+ }
+ return Standard_False;
+ }
+ }
+
+ bool isDumped = false;
+ if (myShaderID != NO_SHADER)
+ {
+ GLint aLength = 0;
+ theCtx->core20fwd->glGetShaderiv (myShaderID, GL_SHADER_SOURCE_LENGTH, &aLength);
+ if (aLength > 0)
+ {
+ TCollection_AsciiString aSource (aLength - 1, '\0');
+ theCtx->core20fwd->glGetShaderSource (myShaderID, aLength, NULL, (GLchar* )aSource.ToCString());
+ dumpShaderSource (aFileName, aSource, theToBeautify);
+ isDumped = true;
+ }
+ }
+ if (!isDumped)
+ {
+ dumpShaderSource (aFileName, "", false);
+ }
+ myDumpDate = OSD_Process().SystemDate();
+ return Standard_False;
+}
projects / occt.git / commitdiff