Cross Reference: /external/skqp/src/shaders/SkPerlinNoiseShader.cpp

Lines Matching defs:noise
217                 // Copy noise data
218                 uint16_t noise[4][kBlockSize][2];
222                             noise[channel][i][j] = fNoise[channel][i][j];
226                 // Do permutations on noise data
230                             fNoise[channel][i][j] = noise[channel][fLatticeSelector[i]][j];
239             // Compute gradients from permutated noise data
246                     // Put the normalized gradient back into the noise data
308      *  About the noise types : the difference between the first 2 is just minor tweaks to the
310      *  noise is generated in the [1, -1] range, the output is brought back in the [0, 1] range by
312      *  kFractalNoise_Type : noise * 0.5 + 0.5
313      *  kTurbulence_Type   : abs(noise)
316      *  http://mrl.nyu.edu/~perlin/noise/. It is quite distinct from the other two, and the noise is
317      *  a 2D slice of a 3D noise texture. Minor changes to the Z coordinate will result in minor
318      *  changes to the noise, making it suitable for animated noise.
382 // limitValue is the maximum perlin noise array index value allowed
383 // newValue is the current noise dimension (either width or height)
385     // If the noise value would bring us out of bounds of the current noise array while we are
386     // stiching noise tiles together, wrap the noise around the current dimension of the noise to
527         SkScalar noise = noise2D(channel, stitchData, noiseVector);
529                             noise : SkScalarAbs(noise);
558 // Improved Perlin Noise based on Java implementation found at http://mrl.nyu.edu/~perlin/noise/
663     // This (1,1) translation is due to WebKit's 1 based coordinates for the noise
857     // Add noise function
923     // affecting the result of the noise by making sure that we only have multiples of 1/255.
986     // Compute the noise as a linear interpolation of 'a' and 'b'
1293     // noise function
1327     fragBuilder->emitFunction(kHalf_GrSLType, "noise", SK_ARRAY_COUNT(noiseArgs), noiseArgs,
1377     const GrImprovedPerlinNoiseEffect& noise = processor.cast<GrImprovedPerlinNoiseEffect>();
1379     const SkVector& baseFrequency = noise.baseFrequency();
1382     pdman.set1f(fZUni, noise.z());
1432             // color space of the noise. Either way, this case (and the GLSL) need to convert to
1473             str->append("\"fractal noise\"");