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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/BrokenGlass.js
+4 -68
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@@ -142,7 +142,6 @@ var BrokenGlass = class BrokenGlass {
if (utils.isInShellProcess()) {
const {Clutter, GdkPixbuf, Cogl, Shell} = imports.gi;
const shaderSnippets = Me.imports.src.shaderSnippets;
// This shader creates a complex-looking effect with rather simple means. Here is how it
// works: The window is drawn five times on top of each other (see the SHARD_LAYERS
@@ -214,74 +213,11 @@ 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.
${shaderSnippets.standardUniforms()}
const decl =
utils.loadGLSLResource(`/shaders/${BrokenGlass.getNick()}-declarations.glsl`);
const code = utils.loadGLSLResource(`/shaders/${BrokenGlass.getNick()}.glsl`);
uniform sampler2D uShardTexture;
uniform vec2 uSeed;
uniform vec2 uEpicenter;
uniform float uShardScale;
uniform float uBlowForce;
uniform float uGravity;
const float SHARD_LAYERS = 5;
const float ACTOR_SCALE = 2.0;
const float PADDING = ACTOR_SCALE / 2.0 - 0.5;
`;
const code = `
cogl_color_out = vec4(0, 0, 0, 0);
float progress = uForOpening ? 1.0-uProgress : uProgress;
// Draw the individual shard layers.
for (float i=0; i<SHARD_LAYERS; ++i) {
// To enable drawing shards outside of the window bounds, the actor was scaled
// by ACTOR_SCALE. Here we scale and move the texture coordinates so that the
// window gets drawn at the correct position again.
vec2 coords = cogl_tex_coord_in[0].st * ACTOR_SCALE - PADDING;
// Scale and rotate around our epicenter.
coords -= uEpicenter;
// Scale each layer a bit differently.
coords /= mix(1.0, 1.0 + uBlowForce*(i+2)/SHARD_LAYERS, progress);
// Rotate each layer a bit differently.
float rotation = (mod(i, 2.0)-0.5)*0.2*progress;
coords = vec2(coords.x * cos(rotation) - coords.y * sin(rotation),
coords.x * sin(rotation) + coords.y * cos(rotation));
// Move down each layer a bit.
float gravity = (uForOpening ? -1.0 : 1.0) * uGravity*0.1*(i+1)*progress*progress;
coords += vec2(0, gravity);
// Restore correct position.
coords += uEpicenter;
// Retrieve information from the shard texture for our layer.
vec2 shardCoords = (coords + uSeed) * uSize / uShardScale / 500.0;
vec2 shardMap = texture2D(uShardTexture, shardCoords).rg;
// The green channel contains a random value in [0..1] for each shard. We
// discretize this into SHARD_LAYERS bins and check if our layer falls into
// the bin of the current shard.
float shardGroup = floor(shardMap.g * SHARD_LAYERS * 0.999);
if (shardGroup == i && (shardMap.x - pow(progress+0.1, 2)) > 0) {
cogl_color_out = texture2D(uTexture, coords);
}
}
// 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;
}
`;
this.add_glsl_snippet(Shell.SnippetHook.FRAGMENT, declarations, code, true);
this.add_glsl_snippet(Shell.SnippetHook.FRAGMENT, decl, code, true);
}
// This is overridden to bind the shard texture for drawing. Sadly, this seems to be