bool Shader::compileSourceFile (CGcontext context,
const QString& file, const QString& entryPoint)
{
QFile dev (file);
if (!dev.open(QIODevice::ReadOnly)) {
qWarning("failed to open file: %s", qPrintable(dev.errorString()));
return false;
}
return compileSourceCode(context, dev.readAll(), entryPoint);
}
bool Shader::compileSourceFile(const std::string& sourceFile)
{
try {
std::string sourceCode = g_resources.readFileContents(sourceFile);
return compileSourceCode(sourceCode);
} catch(stdext::exception& e) {
g_logger.error(stdext::format("unable to load shader source form file '%s': %s", sourceFile, e.what()));
}
return false;
}
BasicFragmentShader::BasicFragmentShader(QObject *parent) :
QGLShader(QGLShader::Fragment, parent)
{
compileSourceCode(
"uniform vec4 color;\n"
"uniform bool hasTexture;\n"
"uniform sampler2D texSampler;\n"
"uniform float diffuseCoef;\n"
"uniform float specularCoef;\n"
"varying vec3 vNormal;\n"
"varying vec3 vLight1Dir;\n"
"varying vec3 vLight2Dir;\n"
"varying vec3 vEyeDir;\n"
"varying vec2 texCoords;\n"
"void main() {\n"
"vec4 newColor = color;\n"
"if (hasTexture) {\n"
"newColor = texture2D(texSampler, texCoords);\n"
"}\n"
"vec4 light1Color = vec4(0.8, 1.0, 1.0, 1.0);\n"
"vec4 light2Color = vec4(1.0, 1.0, 0.8, 1.0);\n"
"vec3 n = normalize(vNormal);\n"
"vec3 l1 = normalize(vLight1Dir);\n"
"vec3 l2 = normalize(vLight2Dir);\n"
"vec3 e = normalize(vEyeDir);\n"
"vec3 r1 = reflect(-l1, n);\n"
"vec3 r2 = reflect(-l2, n);\n"
"float cosAlpha1 = clamp(dot(e, r1), 0.0, 1.0);\n"
"float light1Power = 0.5;\n"
"if (dot(n, e) < 0) {\n"
"n = n * -1;\n"
"}\n"
"float cosTheta1 = clamp(dot(n, l1), 0.0, 1.0);\n"
"float cosAlpha2 = clamp(dot(e, r2), 0.0, 1.0);\n"
"float light2Power = 0.5;\n"
"float cosTheta2 = clamp(dot(n, l2), 0.0, 1.0);\n"
"vec4 ambientColor = vec4(0.2, 0.2, 0.2, 1.0) * newColor;\n"
"vec4 diffuseColor = newColor * light1Color * light1Power * cosTheta1 + newColor * light2Color * light2Power * cosTheta2;\n"
"vec4 specularColor = light1Color * light1Power * pow(cosAlpha1, 200.0) + light2Color * light2Power * pow(cosAlpha2, 200.0);\n"
"gl_FragColor = ambientColor + diffuseColor * diffuseCoef + specularColor * specularCoef;\n"
"}"
);
}
bool Shader::compileSourceFile(const std::string& sourceFile)
{
std::string sourceCode = g_resources.loadFile(sourceFile);
return compileSourceCode(sourceCode);
}
