chore(registry): añadir uses_functions a consumidores reales (gfx)

Auditoria del issue 0044: 14 archivos .md de cpp/functions/gfx/ con
uses_functions actualizado. Resuelve dependencias detectadas via
#include: gl_loader (consumido por casi todo el dominio gfx),
dag_catalog (consumido por la familia dag_*), fullscreen_quad,
gl_framebuffer, gl_shader, mesh_obj_load, uniform_parser y
dag_node_previews.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

cpp/functions/gfx/dag_node_editor.md

@@ -8,7 +8,7 @@ purity: impure
 signature: "bool dag_node_editor(std::vector<DagStep>& pipeline)"
 description: "Renderiza el node editor visual (imgui-node-editor) para el DAG de shaders. Modifica el pipeline in-place: añade/borra nodos, gestiona aristas (source_ids). Devuelve true si la topologia cambio."
 tags: [dag, imgui, node-editor, shader, visual, pipeline, gfx]
-uses_functions: []
+uses_functions: ["dag_catalog_cpp_gfx", "dag_node_previews_cpp_gfx"]
 uses_types: []
 returns: []
 returns_optional: false
@@ -22,6 +22,7 @@ params:
   - name: pipeline
     desc: "vector de DagStep que representa el pipeline actual; modificado in-place"
 output: "true si la topologia cambio (nodos o aristas añadidos/quitados); false en caso contrario"
+notes: "consumido por cpp/apps/shaders_lab/main.cpp"
 ---
 
 ## Notas

cpp/functions/gfx/dag_node_previews.md

@@ -8,7 +8,7 @@ purity: impure
 signature: "void dag_previews_render(const std::vector<DagStep>&, unsigned program, int w, int h); unsigned dag_preview_texture(unsigned editor_uid); void dag_previews_destroy()"
 description: "Renderiza un thumbnail por cada DagStep con preview_open=true a un FBO propio (lazy, keyed por editor_uid). Bind del FBO + glUniform1i(u_preview_target, i) + draw del quad. Devuelve la textura via dag_preview_texture para mostrarla con ImGui::Image."
 tags: [opengl, fbo, preview, dag, gfx]
-uses_functions: [gl_loader_cpp_gfx, gl_framebuffer_cpp_gfx, fullscreen_quad_cpp_gfx, dag_catalog_cpp_gfx]
+uses_functions: ["dag_catalog_cpp_gfx", "fullscreen_quad_cpp_gfx", "gl_framebuffer_cpp_gfx", "gl_loader_cpp_gfx"]
 uses_types: []
 returns: []
 returns_optional: false

cpp/functions/gfx/dag_palette.md

@@ -8,7 +8,7 @@ purity: impure
 signature: "void dag_palette()"
 description: "Paleta de nodos del catalogo, agrupada por kind (Gen/Op/Blend). Cada entrada es un drag source con payload DAG_NODE_TYPE que contiene el name del nodo. El node editor recibe el drop y anade un nuevo DagStep en la posicion del mouse."
 tags: [imgui, dag, palette, drag-and-drop, gfx, component]
-uses_functions: [dag_catalog_cpp_gfx]
+uses_functions: ["dag_catalog_cpp_gfx"]
 uses_types: []
 returns: []
 returns_optional: false

cpp/functions/gfx/dag_uniforms.md

@@ -9,6 +9,7 @@ signature: "void dag_uniforms_apply(const std::vector<DagStep>& pipeline, unsign
 description: "Sube los params del pipeline al shader activo via glUniform4fv. Construye un float[64] con los params de cada DagStep (hasta 16 pasos) y llama glUniform4fv(u_params, 16, data)."
 tags: [dag, shader, uniforms, opengl, gfx, pipeline]
 uses_functions:
+  - dag_catalog_cpp_gfx
   - gl_loader_cpp_gfx
 uses_types:
   - dag_types_cpp_gfx

cpp/functions/gfx/fullscreen_quad.md

@@ -8,7 +8,7 @@ purity: impure
 signature: "void quad_init(Quad& q); void quad_draw(const Quad& q); void quad_destroy(Quad& q)"
 description: "VAO/VBO para un fullscreen quad de 6 vértices. El vertex shader genera las posiciones via gl_VertexID, por lo que el VBO queda vacío. quad_draw emite glDrawArrays(GL_TRIANGLES, 0, 6)."
 tags: [opengl, quad, fullscreen, vao, vbo, gfx]
-uses_functions: []
+uses_functions: ["gl_loader_cpp_gfx"]
 uses_types: []
 returns: []
 returns_optional: false

cpp/functions/gfx/gl_framebuffer.md

@@ -8,7 +8,7 @@ purity: impure
 signature: "void fb_init(Framebuffer& f); void fb_resize(Framebuffer& f, int w, int h); void fb_destroy(Framebuffer& f)"
 description: "CRUD de un framebuffer OpenGL (FBO + textura RGBA8). fb_resize es no-op si las dimensiones no cambian. Listo para uso con ImGui::Image."
 tags: [opengl, framebuffer, fbo, texture, gfx, offscreen]
-uses_functions: []
+uses_functions: ["gl_loader_cpp_gfx"]
 uses_types: []
 returns: []
 returns_optional: false

cpp/functions/gfx/gl_shader.md

@@ -8,7 +8,7 @@ purity: impure
 signature: "CompileResult compile_fragment(const std::string& user_fragment_src)"
 description: "Compila un cuerpo de fragment shader GLSL 330 y retorna un GL program listo para usar. Prepende automáticamente version, out vec4 fragColor y uniforms u_resolution/u_time/u_mouse. Usa GL_GLEXT_PROTOTYPES + GL/glext.h."
 tags: [opengl, shader, glsl, compile, fragment, gfx]
-uses_functions: []
+uses_functions: ["gl_loader_cpp_gfx"]
 uses_types: []
 returns: []
 returns_optional: false
@@ -23,6 +23,7 @@ params:
   - name: user_fragment_src
     desc: "Cuerpo del fragment shader GLSL sin #version, sin 'out vec4 fragColor' ni declaraciones de uniforms. Solo el void main() y funciones auxiliares."
 output: "CompileResult con program=GL id si ok=true, o err_msg/err_line si falla. program=0 indica error."
+notes: "consumido por cpp/apps/shaders_lab/main.cpp; scaffolding/demo en primitives_gallery"
 ---
 
 # gl_shader

cpp/functions/gfx/gl_texture_load.md

@@ -8,7 +8,7 @@ purity: impure
 signature: "GlTexture gl_texture_load(const char* path, bool flip_y, bool srgb)"
 description: "Carga PNG/JPG/BMP/TGA/HDR desde disco (o memoria) a una textura OpenGL lista para usar como sampler2D. Vendorea stb_image. Soporta sRGB (GL_SRGB8_ALPHA8) y HDR (GL_RGBA16F via stbi_loadf). Genera mipmaps automaticamente. flip_y=true por defecto coincide con la convencion UV de OpenGL."
 tags: [opengl, texture, image, png, jpg, hdr, stb_image, gfx]
-uses_functions: [gl_loader_cpp_gfx]
+uses_functions: ["gl_loader_cpp_gfx"]
 uses_types: []
 returns: []
 returns_optional: false

cpp/functions/gfx/mesh_gpu.md

@@ -8,7 +8,7 @@ purity: impure
 signature: "MeshGpu mesh_gpu_upload(const Mesh&); void mesh_gpu_destroy(MeshGpu&)"
 description: "Sube un Mesh CPU a OpenGL como VAO + VBO interleaved (pos.xyz, normal.xyz) + EBO uint32. Layout: location 0 = a_pos vec3, location 1 = a_normal vec3, stride 6 floats."
 tags: [opengl, mesh, vao, vbo, ebo, gpu, gfx]
-uses_functions: [mesh_obj_load_cpp_gfx]
+uses_functions: ["gl_loader_cpp_gfx", "mesh_obj_load_cpp_gfx"]
 uses_types: []
 returns: []
 returns_optional: false

cpp/functions/gfx/shader_canvas.md

@@ -9,9 +9,10 @@ signature: "void canvas_render(ShaderCanvas& c, float time_seconds, const std::f
 description: "Componente ImGui que renderiza un fragment shader GLSL a un FBO y lo muestra en el panel actual. Compone gl_framebuffer, fullscreen_quad y gl_shader. Gestiona resize automático y coordenadas de mouse. Acepta callback opcional uniforms_fn invocado tras glUseProgram para uniforms custom."
 tags: [opengl, shader, canvas, imgui, fbo, gfx, component]
 uses_functions:
-  - gl_shader_cpp_gfx
-  - gl_framebuffer_cpp_gfx
   - fullscreen_quad_cpp_gfx
+  - gl_framebuffer_cpp_gfx
+  - gl_loader_cpp_gfx
+  - gl_shader_cpp_gfx
   - uniform_panel_cpp_gfx
 uses_types: []
 returns: []

cpp/functions/gfx/uniform_panel.md

@@ -9,8 +9,8 @@ signature: "void uniforms_panel(UniformStore&, const std::vector<UniformDescript
 description: "Panel ImGui auto-generado a partir de UniformDescriptor. Sincroniza un UniformStore con los descriptores, renderiza widgets (slider/color/toggle/xy) y aplica los valores al programa GL activo vía glUniform*."
 tags: [opengl, shader, uniforms, imgui, controls, gfx, component]
 uses_functions:
-  - uniform_parser_cpp_gfx
   - gl_loader_cpp_gfx
+  - uniform_parser_cpp_gfx
 uses_types: []
 returns: []
 returns_optional: false