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🚚 Move shader code to GLSL files

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This commit is contained in:
Simon Schneegans
2022-05-13 08:27:09 +02:00
parent 77d5de7b8e
commit 46cc997e2a
43 changed files with 1303 additions and 1334 deletions
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src/Wisps.js
+4 -101
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@@ -133,7 +133,6 @@ var Wisps = class Wisps {
if (utils.isInShellProcess()) {
const {Clutter, Shell} = imports.gi;
const shaderSnippets = Me.imports.src.shaderSnippets;
ShaderClass = GObject.registerClass({}, class ShaderClass extends Shell.GLSLEffect {
// This is called when the effect is used for the first time. This can be used to
@@ -170,107 +169,11 @@ if (utils.isInShellProcess()) {
// This is called by the constructor. This means, it's only called when the effect
// is used for the first time.
vfunc_build_pipeline() {
const declarations = `
// Inject some common shader snippets.
${shaderSnippets.standardUniforms()}
${shaderSnippets.noise()}
${shaderSnippets.edgeMask()}
${shaderSnippets.compositing()}
const decl =
utils.loadGLSLResource(`/shaders/${Wisps.getNick()}-declarations.glsl`);
const code = utils.loadGLSLResource(`/shaders/${Wisps.getNick()}.glsl`);
uniform vec2 uSeed;
uniform vec3 uColor;
uniform float uScale;
const float WISPS_RADIUS = 20.0;
const float WISPS_SPEED = 10.0;
const float WISPS_SPACING = 40 + WISPS_RADIUS;
const int WISPS_LAYERS = 8;
const float WISPS_IN_TIME = 0.5;
const float WINDOW_OUT_TIME = 1.0;
// Returns a grid of randomly moving points. Each grid cell contains one point which
// moves on an ellipse.
float getWisps(vec2 texCoords, float gridSize, vec2 seed) {
// Shift coordinates by a random offset and make sure the have a 1:1 aspect ratio.
vec2 coords = (texCoords + hash22(seed)) * uSize;
// Apply global scale.
coords /= gridSize;
// Get grid cell coordinates in [0..1].
vec2 cellUV = mod(coords, vec2(1));
// This is unique for each cell.
vec2 cellID = coords-cellUV + vec2(362.456);
// Add random rotation, scale and offset to each grid cell.
float speed = mix(10.0, 15.0, hash12(cellID*seed*134.451)) / gridSize * WISPS_SPEED;
float rotation = mix( 0.0, 6.283, hash12(cellID*seed*54.4129));
float radius = mix( 0.5, 1.0, hash12(cellID*seed*19.1249)) * WISPS_RADIUS;
float roundness = mix(-1.0, 1.0, hash12(cellID*seed*7.51949));
vec2 offset = vec2(sin(speed * (uTime+1)) * roundness, cos(speed * (uTime+1)));
offset *= 0.5 - 0.5 * radius / gridSize;
offset = vec2(offset.x * cos(rotation) - offset.y * sin(rotation),
offset.x * sin(rotation) + offset.y * cos(rotation));
cellUV += offset;
// Use distance to center of shifted / rotated UV coordinates to draw a glaring point.
float dist = length(cellUV - 0.5) * gridSize / radius;
if (dist < 1.0) {
return min(5, 0.01 / pow(dist, 2.0));
}
return 0.0;
}
`;
const code = `
float progress = uForOpening ? 1.0-uProgress : uProgress;
// Get the color of the window.
cogl_color_out = texture2D(uTexture, cogl_tex_coord_in[0].st);
// Shell.GLSLEffect uses straight alpha. So we have to convert from premultiplied.
if (cogl_color_out.a > 0) {
cogl_color_out.rgb /= cogl_color_out.a;
}
// Compute several layers of moving wisps.
vec2 uv = (cogl_tex_coord_in[0].st-0.5) / mix(1.0, 0.5, progress) + 0.5;
uv /= uScale;
float wisps = 0;
for (int i=0; i<WISPS_LAYERS; ++i) {
wisps += getWisps(uv*0.3, WISPS_SPACING, uSeed * (i+1));
}
// Compute shrinking edge mask.
float mask = getRelativeEdgeMask(mix(0.01, 0.5, progress));
// Compute three different progress values.
float wispsIn = smoothstep(0, 1, clamp(progress/WISPS_IN_TIME, 0, 1));
float wispsOut = smoothstep(0, 1, clamp((progress - WISPS_IN_TIME)/(1.0 - WISPS_IN_TIME), 0, 1));
float windowOut = smoothstep(0, 1, clamp(progress/WINDOW_OUT_TIME, 0, 1));
// Use a noise function to dissolve the window.
float noise = smoothstep(1.0, 0.0, abs(2.0 * simplex2DFractal(uv * uSize / 250) - 1.0));
float windowMask = 1.0 - (windowOut < 0.5 ? mix(0.0, noise, windowOut * 2.0) : mix(noise, 1.0, windowOut * 2.0 - 1.0));
cogl_color_out.a *= windowMask * mask;
// Add the wisps.
vec4 wispColor = wisps * vec4(uColor, min(wispsIn, 1.0 - wispsOut)*mask);
cogl_color_out = alphaOver(cogl_color_out, wispColor);
// These are pretty useful for understanding how this works.
// cogl_color_out = vec4(vec3(windowMask), 1.0);
// cogl_color_out = vec4(vec3(wisps), 1.0);
// cogl_color_out = vec4(vec3(noise), 1.0);
// cogl_color_out = vec4(vec3(mask*min(wispsIn, 1.0 - wispsOut)), 1.0);
`;
this.add_glsl_snippet(Shell.SnippetHook.FRAGMENT, declarations, code, true);
this.add_glsl_snippet(Shell.SnippetHook.FRAGMENT, decl, code, true);
}
});
}