341 lines
11 KiB
C++
341 lines
11 KiB
C++
#include "RenderPCH.h"
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#include "nvparse.h"
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namespace
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{
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void ParseVertexProgramConstants( GLenum target, char *instring);
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GLuint LookupTrackMatrix(char *matrixName);
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GLuint LookupTrackMatrixTransform(char *matrixTransformName);
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}
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bool is_vcp10(const char * s)
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{
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return ! strncmp(s, "!!VCP1.0", 8);
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}
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bool vcp10_init(char * s)
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{
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static int vpinit = 0;
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if (vpinit == 0 )
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{
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if(!SUPPORTS_GL_NV_vertex_program)
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{
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errors.set("unable to initialize GL_NV_vertex_program");
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return false;
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}
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else
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{
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vpinit = 1;
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}
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}
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errors.reset();
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line_number = 1;
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myin = s;
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return true;
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}
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int vcp10_parse()
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{
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// parse the constant declarations, setting their values in the GL.
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ParseVertexProgramConstants( GL_VERTEX_PROGRAM_NV, myin);
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return 0;
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}
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namespace
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{
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//.----------------------------------------------------------------------------.
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//| Function : ParseVertexProgramConstants |
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//| Description: Parse and set VP1.0 constant memory based on const |
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//| directives. |
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//| |
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//| Format : constXX = (x, y, z, w); # where XXX is an integer 0-95. |
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//| : constXX = TRACK(matrix, transform); # track a matrix |
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//.----------------------------------------------------------------------------.
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void ParseVertexProgramConstants(GLenum target, char *instring)
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{
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// don't overwrite the original string.
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char *tmpstring = new char[strlen(instring)+1];
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strcpy(tmpstring, instring);
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char lineSeparator[] = "\n";
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char wordSeparator[] = " \t";
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char error[256];
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char dummy[256];
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char *token;
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//iterate over the lines in the string
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token = strtok(tmpstring, lineSeparator);
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// we assume the first line is the "!!VP1.0 line".
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if (token != NULL)
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{
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token = strtok(NULL, lineSeparator);
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}
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int iLineCount = 1; // skip first line
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while (token != NULL)
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{
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iLineCount++;
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// if the first non-whitespace character is a #, this is a comment. Skip.
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if (!sscanf(token, " #%s", dummy))
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{ // not a comment. Is it a constant?
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// strip whitespace from the beginning of the string
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int i;
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for (i = 0; i < (int)strlen(token) && isspace(token[i]); i++);
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token += i;
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if (strlen(token) > 0 && // this is not a blank line and
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!strnicmp(token, "c[", 2)) // the first word is of the form "c[xx]", so its a constant.
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{
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int iConstID;
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int iNumValuesAssigned;
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char c[6];
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iNumValuesAssigned = sscanf(token, " %c [ %d ] = %s ", &c[0], &iConstID, dummy);
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if (3 != iNumValuesAssigned || toupper(c[0]) != 'C')
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{ // error in constant directive.
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sprintf(error, "error at line %d \n\"%s\"\n", iLineCount, token);
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errors.set(error);
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}
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else if (!strnicmp(dummy, "track", 5))
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{ // this is a TrackMatrix directive
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char matrixName[256], matrixTransformName[256];
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// the series of %c's are to make sure "track(" doesn't get glommed onto the matrixName
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iNumValuesAssigned = sscanf(token,
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" %c [ %d ] = %c%c%c%c%c ( %s %s ) ;",
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&c[0], &iConstID, &c[1], &c[2], &c[3], &c[4], &c[5],
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matrixName, matrixTransformName);
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if (iNumValuesAssigned < 8)
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{
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sprintf(error, "error at line %d \n\"%s\"\n", iLineCount, token);
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errors.set(error);
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}
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else
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{
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char *buffer;
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if (9 == iNumValuesAssigned)
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{
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// just need to remove any junk from the matrix names and IDs.
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if (buffer = strstr(matrixName, ","))
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buffer[0] = 0;
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if (buffer = strstr(matrixTransformName, ")"))
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buffer[0] = 0;
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}
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else // 8 == iNumValuesAssigned
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{
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// have to split the two names, since they both were put into the matrixName
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if (buffer = strstr(matrixName, ","))
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{
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strcpy(matrixTransformName, buffer + 1);
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buffer[0] = 0;
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// get rid of paren at end of transform name, if it is there
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if (buffer = strstr(matrixTransformName, ")"))
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{
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buffer[0] = 0;
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}
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}
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else
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{
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sprintf(error, "error at line %d \n\"%s\"\n", iLineCount, token);
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errors.set(error);
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}
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}
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// constant ID must be modulo 4.
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if (0 != (iConstID % 4))
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{
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sprintf(error,
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"error at line %d \n\"%s\"\n\tglTrackMatrixNV address must be modulo 4\n",
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iLineCount, token);
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errors.set(error);
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}
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else if (iConstID < 0 || iConstID > 95)
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{
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sprintf(error,
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"error at line %d \n\"%s\"\n\tConstant address out of range\n",
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iLineCount, token);
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errors.set(error);
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}
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else
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{
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// get the enum values for the specified matrices
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GLuint iMatrixID = LookupTrackMatrix(matrixName);
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GLuint iTransformID = LookupTrackMatrixTransform(matrixTransformName);
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if (0 == iMatrixID)
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{
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sprintf(error,
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"error at line %d \n\"%s\"\n\tInvalid Matrix parameter in glTrackMatrixNV.\n",
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iLineCount, token);
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errors.set(error);
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}
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else if (0 == iTransformID)
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{
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sprintf(error,
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"error at line %d \n\"%s\"\n\tInvalid Transform parameter in glTrackMatrixNV\n",
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iLineCount, token);
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errors.set(error);
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}
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else
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{
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// untrack any currently tracked matrix
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glTrackMatrixNV(target, iConstID, GL_NONE, GL_IDENTITY_NV);
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// tell GL the matrix to track
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glTrackMatrixNV(target, iConstID, iMatrixID, iTransformID);
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}
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}
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}
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}
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else // this is a constant directive
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{
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float xyzw[4] = {0, 0, 0, 0};
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iNumValuesAssigned = sscanf(token,
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" %c [ %d ] = ( %f , %f , %f , %f ) ; ",
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&c, &iConstID, xyzw, xyzw + 1, xyzw + 2, xyzw + 3);
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if (6 != iNumValuesAssigned)
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{ // error in constant directive.
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sprintf(error, "error at line %d \n\"%s\"\n", iLineCount, token);
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errors.set(error);
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}
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else if (iConstID < 0 || iConstID > 95)
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{
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sprintf(error,
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"error at line %d \n\"%s\"\n\tConstant address out of range\n",
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iLineCount, token);
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errors.set(error);
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}
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else
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{
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// Always set the closest matrix location to tracking NONE to avoid errors!
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glTrackMatrixNV(target, iConstID - (iConstID % 4), GL_NONE, GL_IDENTITY_NV);
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// tell GL the constant values
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glProgramParameter4fvNV(target, iConstID, xyzw);
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}
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}
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}
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}
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// get the next line
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token = strtok(NULL, lineSeparator);
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}
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}
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struct MatrixLookupEntry
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{
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string name;
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GLuint ID;
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};
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//.----------------------------------------------------------------------------.
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//| Function : LookupTrackMatrix |
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//| Description: Returns the enumerated matrix name given a valid string |
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//| or 0 if an unknown matrix is requested. |
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//.----------------------------------------------------------------------------.
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GLuint LookupTrackMatrix(char *matrixName)
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{
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static bool bFirstTime = true;
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static int iNumEntries = 14;
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static MatrixLookupEntry* matrixLookupTable = new MatrixLookupEntry[iNumEntries];
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if (bFirstTime) // build the lookup table
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{
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matrixLookupTable[0].name = "GL_NONE";
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matrixLookupTable[0].ID = GL_NONE;
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matrixLookupTable[1].name = "GL_MODELVIEW";
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matrixLookupTable[1].ID = GL_MODELVIEW;
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matrixLookupTable[2].name = "GL_PROJECTION";
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matrixLookupTable[2].ID = GL_PROJECTION;
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matrixLookupTable[3].name = "GL_TEXTURE";
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matrixLookupTable[3].ID = GL_TEXTURE;
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matrixLookupTable[4].name = "GL_COLOR";
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matrixLookupTable[4].ID = GL_COLOR;
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matrixLookupTable[5].name = "GL_MODELVIEW_PROJECTION_NV";
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matrixLookupTable[5].ID = GL_MODELVIEW_PROJECTION_NV;
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matrixLookupTable[6].name = "GL_MATRIX0_NV";
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matrixLookupTable[6].ID = GL_MATRIX0_NV;
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matrixLookupTable[7].name = "GL_MATRIX1_NV";
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matrixLookupTable[7].ID = GL_MATRIX1_NV;
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matrixLookupTable[8].name = "GL_MATRIX2_NV";
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matrixLookupTable[8].ID = GL_MATRIX2_NV;
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matrixLookupTable[9].name = "GL_MATRIX3_NV";
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matrixLookupTable[9].ID = GL_MATRIX3_NV;
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matrixLookupTable[10].name = "GL_MATRIX4_NV";
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matrixLookupTable[10].ID = GL_MATRIX4_NV;
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matrixLookupTable[11].name = "GL_MATRIX5_NV";
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matrixLookupTable[11].ID = GL_MATRIX5_NV;
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matrixLookupTable[12].name = "GL_MATRIX6_NV";
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matrixLookupTable[12].ID = GL_MATRIX6_NV;
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matrixLookupTable[13].name = "GL_MATRIX7_NV";
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matrixLookupTable[13].ID = GL_MATRIX7_NV;
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bFirstTime = false;
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}
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for (int i = 0; i < iNumEntries; i++)
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{
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if (!strcmp(matrixName, matrixLookupTable[i].name.c_str()))
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{
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return matrixLookupTable[i].ID;
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}
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}
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return 0;
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}
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//.----------------------------------------------------------------------------.
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//| Function : LookupTrackMatrixTransform |
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//| Description: Returns the enumerated matrix transform name given a valid |
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//| string name or 0 if an unknown transform is requested. |
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//.----------------------------------------------------------------------------.
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GLuint LookupTrackMatrixTransform(char *matrixTransformName)
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{
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static bool bFirstTime = true;
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static int iNumEntries = 4;
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static MatrixLookupEntry* transformLookupTable = new MatrixLookupEntry[iNumEntries];
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if (bFirstTime)
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{
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transformLookupTable[0].name = "GL_IDENTITY_NV";
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transformLookupTable[0].ID = GL_IDENTITY_NV;
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transformLookupTable[1].name = "GL_INVERSE_NV";
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transformLookupTable[1].ID = GL_INVERSE_NV;
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transformLookupTable[2].name = "GL_TRANSPOSE_NV";
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transformLookupTable[2].ID = GL_TRANSPOSE_NV;
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transformLookupTable[3].name = "GL_INVERSE_TRANSPOSE_NV";
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transformLookupTable[3].ID = GL_INVERSE_TRANSPOSE_NV;
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bFirstTime = false;
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}
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for (int i = 0; i < iNumEntries; i++)
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{
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if (!strcmp( matrixTransformName, transformLookupTable[i].name.c_str()))
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{
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return transformLookupTable[i].ID;
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}
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}
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return 0;
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}
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} |