From c6a5aaf5c4a020eaefe24943ecb6cf9d4eb26836 Mon Sep 17 00:00:00 2001 From: Gabriel Schneider Date: Mon, 28 Sep 2026 15:57:22 -0300 Subject: Post chain: Shadertoy passes compiled by glslc; Crt, Ripple and Glitch rewritten as Shadertoy files Stage 9 of docs/render-pipeline.md. src/gui/Post.zig runs the chain over the finished frame: each pass reads the one before, ping-pong textures between, the last writes the window; an empty chain is the direct path. The prefix (shaders/post/prefix.glsl) is ghostty's uniform block, name for name and offset for offset (tested against a copy of its Uniforms, the selection colours by their GLSL names), at SDL GPU's bindings, y down. A user's file (Shader ) is compiled by glslc with compileGlsl's own flags on a thread of its own, taken in at the next loop step; errors name the file's own lines; a failed compile keeps the last good pipeline; glslc missing is said once. The bundled passes compile with the build, through the same prefix. Crt, Ripple and Glitch are Shadertoy files, rewritten: no barrel (input is identity, tested), everything in linear light and dithered, keyed to iTime. scene_effects, crt.zig and crt.frag.glsl are gone; the core keeps no clock for the chain. ShaderAnimation off|on|always drives redraw level A: the chain alone over the retained frame (34 us CPU a redraw, measured). Shared files touched: pardes.zig (nextWake loses the scene line, disableSceneEffects empties the chain, two tests), builtins.zig (one switch arm), ninep/ctl.zig (two switch arms), macos.zig (flags from the chain), gui.zig. Not touched: Messages.zig, mouse.zig, detached/*, host_io, tty. --- src/effect_sources.zig | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) (limited to 'src/effect_sources.zig') diff --git a/src/effect_sources.zig b/src/effect_sources.zig index 08680860..6ce11160 100644 --- a/src/effect_sources.zig +++ b/src/effect_sources.zig @@ -11,8 +11,11 @@ const ui_vertex_path = shader_dir ++ "ui.vert.glsl"; const ui_fragment_path = shader_dir ++ "ui.frag.glsl"; const image_vertex_path = shader_dir ++ "image.vert.glsl"; const image_fragment_path = shader_dir ++ "image.frag.glsl"; -const scene_vertex_path = shader_dir ++ "crt.vert.glsl"; -const scene_fragment_path = shader_dir ++ "crt.frag.glsl"; +const post_vertex_path = shader_dir ++ "post.vert.glsl"; +// The bundled post passes as compiled: the prefix and the pass together. +const post_crt_path = shader_dir ++ "post-crt.frag.glsl"; +const post_ripple_path = shader_dir ++ "post-ripple.frag.glsl"; +const post_glitch_path = shader_dir ++ "post-glitch.frag.glsl"; pub const Backend = @TypeOf(build_config.platform); pub const backend: Backend = build_config.platform; @@ -45,13 +48,15 @@ pub const files = switch (backend) { }, .gui => [_]filesystem.Source{ .{ .path = "src/gui/gui.zig", .contents = @embedFile("gui/gui.zig") }, - .{ .path = "src/gui/crt.zig", .contents = @embedFile("gui/crt.zig") }, + .{ .path = "src/gui/Post.zig", .contents = @embedFile("gui/Post.zig") }, .{ .path = ui_vertex_path, .contents = @embedFile("effect-source-ui.vert.glsl") }, .{ .path = ui_fragment_path, .contents = @embedFile("effect-source-ui.frag.glsl") }, .{ .path = image_vertex_path, .contents = @embedFile("effect-source-image.vert.glsl") }, .{ .path = image_fragment_path, .contents = @embedFile("effect-source-image.frag.glsl") }, - .{ .path = scene_vertex_path, .contents = @embedFile("effect-source-crt.vert.glsl") }, - .{ .path = scene_fragment_path, .contents = @embedFile("effect-source-crt.frag.glsl") }, + .{ .path = post_vertex_path, .contents = @embedFile("effect-source-post.vert.glsl") }, + .{ .path = post_crt_path, .contents = @embedFile("effect-source-post-crt.frag.glsl") }, + .{ .path = post_ripple_path, .contents = @embedFile("effect-source-post-ripple.frag.glsl") }, + .{ .path = post_glitch_path, .contents = @embedFile("effect-source-post-glitch.frag.glsl") }, }, .macos => [_]filesystem.Source{ .{ .path = "src/macos/Sources/PardesView.swift", .contents = @embedFile("macos/Sources/PardesView.swift") }, @@ -69,8 +74,12 @@ pub fn forSetting(setting: config.Runtime.Setting) ?[]const []const u8 { .macos => &.{ "src/layout.zig", "src/pardes.zig", "src/macos/Sources/PardesView.swift", "src/macos/Sources/ScenePostprocessor.swift", "shaders/crt.ci.metal" }, .web, .esp32p4 => null, }, - .scene => switch (backend) { - .gui => &.{ "src/gui/crt.zig", "src/gui/gui.zig", scene_vertex_path, scene_fragment_path }, + .scene => |effect| switch (backend) { + .gui => switch (effect) { + .crt => &.{ "src/gui/Post.zig", "src/gui/gui.zig", post_vertex_path, post_crt_path }, + .ripple => &.{ "src/gui/Post.zig", "src/gui/gui.zig", post_vertex_path, post_ripple_path }, + .glitch => &.{ "src/gui/Post.zig", "src/gui/gui.zig", post_vertex_path, post_glitch_path }, + }, .macos => &.{ "src/macos/Sources/PardesView.swift", "src/macos/Sources/ScenePostprocessor.swift", "shaders/crt.ci.metal" }, .tty, .web, .esp32p4 => null, }, -- cgit v1.3