p5.RendererGL: replace console.log/warn with Friendly Error System (FES)

[MASTERsj01]

Increasing access

p5.RendererGL.js has 6 console.log/warn and p5.RendererGL.Immediate.js has 2 — covering setAttributes, loadPixels, blendMode, dimension limits, tesselation, vertex texture, and instancing warnings. These should use p5._friendlyError() for FES consistency.

Most appropriate sub-area of p5.js?

• Accessibility
• Color
• Core/Environment/Rendering
• Data
• DOM
• Events
• Image
• IO
• Math
• Typography
• Utilities
• WebGL
• Build process
• Unit testing
• Internationalization
• Friendly errors
• Other (specify if possible)

Feature enhancement details

src/webgl/p5.RendererGL.js and src/webgl/p5.RendererGL.Immediate.js use console.log and console.warn instead of p5._friendlyError() in several places:

p5.RendererGL.js (6 calls):

• Line 269: console.log in setAttributes() — non-WEBGL renderer warning
• Line 957: console.warn — hardware dimension limit warning
• Line 1362: console.warn in blendMode() — unsupported 2D-only modes
• Line 1532: console.log in loadPixels() — preserveDrawingBuffer warning
• Lines 2605, 2610-2611: console.log in tesselation callbacks

p5.RendererGL.Immediate.js (2 calls):

• Line 148: console.warn in vertex() — missing texture() call
• Line 546: console.log — WebGL2 instancing warning

These should use p5._friendlyError() for consistency with the rest of the codebase.