void init() {
if (!initialized) {
GLuint vertexShaderId = glCreateShader(GL_VERTEX_SHADER);
GLuint fragmentShaderId = glCreateShader(GL_FRAGMENT_SHADER);
// vertex shader
glShaderSource(vertexShaderId, 1, &vertexShader, NULL);
glCompileShader(vertexShaderId);
checkShaderError(vertexShaderId,
"Vertex shader compilation failed.");
// fragment shader
glShaderSource(fragmentShaderId, 1, &fragmentShader, NULL);
glCompileShader(fragmentShaderId);
checkShaderError(fragmentShaderId,
"Fragment shader compilation failed.");
// linking program
programId = glCreateProgram();
glAttachShader(programId, vertexShaderId);
glAttachShader(programId, fragmentShaderId);
glLinkProgram(programId);
checkProgramError(programId, "Shader program link failed.");
// once linked into a program, we no longer need the shaders.
glDeleteShader(vertexShaderId);
glDeleteShader(fragmentShaderId);
projectionUniformId = glGetUniformLocation(programId, "projection");
modelViewUniformId = glGetUniformLocation(programId, "modelView");
initialized = true;
}
}
bool CgUtil::MakeHaloShader(int pow) {
char fp[10096];
sprintf(fp,"\
!!ARBfp1.0\n\
\n\
ATTRIB data = fragment.texcoord; \n\
\n\
TEMP tmp,tmp2,tmp3, t,t0,t1,t2,nor,n,nabs,nsign,disp,res,depth,pos,\n\
lighting; \n\
\n\
MOV nor, data; \n\
MUL tmp, data, data; \n\
ADD tmp2.x, tmp.x, tmp.y;\n\
ADD tmp2.z, -tmp2.x, 1;\n\
KIL tmp2.z;\n\
\n\
MAD tmp2.x, -data.z, tmp2.x, data.z;\n\
\n\
#TEST!\n\
#ADD tmp2.x, tmp2.x, %10.8f;\n\
#CMP result.color, tmp2.x, {1,0,0,1}, {0,0,1,1};\n\
\n\
MUL tmp, fragment.position, {%14.12f, %14.12f, 0, 0};\n\
#MAD tmp, fragment.position, {0.5, 0.5, 0, 0}, {0.5, 0.5, 0, 0};\n\
TEX tmp.z, tmp, texture[1], 2D; # tmp.z = old depth \n\
ADD tmp.z, tmp.z, -fragment.position.z; \n\
MUL_SAT tmp.z, tmp.z, program.env[0].x; \n\
MUL tmp.z, tmp.z, tmp2.x; \n\
MUL tmp.z, tmp.z, tmp2.x; # again for smoother edges\n\
", +P_halo_str-1, 1.0f/(1<<pow), 1.0f/(1<<pow) );
if (P_halo_str<1.0) {
sprintf(fp,"%sMUL tmp.z , tmp.z, %10.8f;\n",fp, P_halo_str );
}
if (!doingAlphaSnapshot)
sprintf(fp,"%sMAD result.color, {0,0,0,1}, tmp.z, {%5.4f,%5.4f,%5.4f,0.0} ;\n",fp,P_halo_col,P_halo_col,P_halo_col);
else {
if (P_halo_col==1.0) // white halo
sprintf(fp,"%sMOV result.color, tmp.z;\n",fp);
else
sprintf(fp,"%sMUL result.color, {0,0,0,1}, tmp.z;\n",fp);
}
sprintf(fp,"%sEND\n",fp);
glProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB, strlen(fp), fp);
// printf("\n-------<fp HALO>--------\n%s",fp);
if(!checkProgramError(fp)) return false;
return true;
}
