egutierrez
ac65791663
- DagStep: preview_open flag (default false). - dag_compile: emit `uniform int u_preview_target` and a series of early-return branches at the start of fragColor selection. -1 (default) falls through to the real Output-driven fragColor. - dag_node_previews (new fn): per-node FBO keyed by editor_uid, lazy created. Renders each node with preview_open=true to its FBO by setting u_preview_target = step index. Texture exposed via dag_preview_texture(uid) for ImGui::Image. - dag_node_editor: small toggle button "[+] preview"/"[-] preview" in each non-Output node; when open, ImGui::Image(96x64, V-flipped). - dag_node_editor: double right-click on hovered node deletes it (Output is protected). - main.cpp: dag_previews_render after Canvas DAG; dag_previews_destroy on shutdown. Single GL program drives both the canvas and all thumbnails — moving sliders never recompiles, only the topology change does. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
26 lines
961 B
C++
26 lines
961 B
C++
#pragma once
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#include <vector>
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#include "gfx/dag_types.h"
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namespace fn::gfx {
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// Renders a small thumbnail per node that has preview_open == true, by binding
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// the node's FBO and drawing the DAG shader with u_preview_target = step index.
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// Each node's FBO is created lazily and keyed by editor_uid. The active GL
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// program must be the one returned by compile_dag_to_glsl(pipeline).
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//
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// Pass the pipeline used to compile `program` so target indices match.
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void dag_previews_render(const std::vector<DagStep>& pipeline,
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unsigned program,
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int width = 96, int height = 64);
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// Returns the OpenGL texture id for the preview of `editor_uid`, or 0 if
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// none exists. Use with ImGui::Image(). Call AFTER dag_previews_render so
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// the texture has fresh contents.
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unsigned dag_preview_texture(unsigned editor_uid);
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// Free all preview FBOs. Call on shutdown.
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void dag_previews_destroy();
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} // namespace fn::gfx
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