CNA-VGAP-021: No SpriteFont/DrawString pixel test exists for DIRECTX9, DIRECT2D, GDI, METAL, CANVAS, SVG_DOM, PORTABLEGL or FNA3D

CNA snapshot 009d40f5  ·  Known Issues › Verification gaps  ·  source links pinned to 009d40f5

SpriteFont/DrawString reach pixels in a registered test on EasyGL, OPENGL4, SOFTWARE, SDL_RENDERER, VULKAN, SDL_GPU and WEBGPU (the latter two through the shared sprite_font parity fixture), the DIRECTX11/12 parity set, FREEDIRECT and, in its browser suite, HTML_DOM. Eight families rely on shared glyph-layout code without any text pixel test.

Identifier

CNA-VGAP-021

Category

Verification gap

Subsystem

Testing & evidence

Status

Open

Verified against

CNA 009d40f5 (009d40f5dd085c4e674d3479675fac84b12b3e0a)

Evidence basis

Source-verified: read at TARGET, not executed

Tests touching this area

Yes: see Current tests

Affected contract

SpriteBatch::DrawString / SpriteFont rendering per renderer

Expected behaviour

Text rendering combines shared layout with each renderer's sprite path (filtering, premultiplication, sub-pixel handling), so each family needs at least one pixel check.

Actual behaviour at TARGET

A count of SpriteFont/DrawString registrations in each renderer's examples/CMakeLists.txt and in the shared corpora finds them for EasyGL, OPENGL4 (EasyGLParityCorpus.cmake), SOFTWARE, SDL_RENDERER, VULKAN and FREEDIRECT, plus the DIRECTX11/12 parity fixtures in DirectXParityTests.cmake. The shared parity fixture parity_sprite_font (WEBGPU-179: a SpriteFont string, a newline and a default-character substitution reach pixels) is registered by cna_register_parity_fixtures for SDL_GPU (SdlGpu_Parity_sprite_font), WEBGPU (WebGPU_Parity_sprite_font), EasyGL and OPENGL4. HTML_DOM's browser suite (htmldom_smoke_test.cpp and htmldom_pixel_verification_test.cpp, run by htmldom-ci.yml) also draws strings and checks their pixels. None is registered for DIRECTX9, DIRECT2D, GDI, METAL, CANVAS, SVG_DOM, PORTABLEGL or FNA3D; HEADLESS and STUB rasterise nothing.

Source locations

• cmake/DirectXParityTests.cmake — SpriteFont_* parity fixtures for DIRECTX11/12
• modules/renderers/opengl4/examples/EasyGLParityCorpus.cmake — OPENGL4 text fixtures

Evidence

Checked by reading the named sources at 009d40f5; nothing was built or executed for this entry. Coverage established by grepping registrations; tests were not run.

Independent re-verification: Checked by reading the named sources at 009d40f5; nothing was built or executed for this entry. The first count missed the shared parity_sprite_font fixture and HTML_DOM's browser pixel page. Coverage was established by grepping registrations, the shared parity inventory and each renderer's example directory; tests were not run. SdlGpu_Parity_sprite_font is not among the failing classic SDL_GPU tests in CNA's latest record (PSG-0009, STREETS-0008). The blast radius is text output on the eight listed renderers.

Focused reproduction

No focused reproduction is known. Nothing has been invented here; the evidence above is what exists.

Current tests

Renderer-independent SpriteFont layout tests exist in the graphics module; they do not rasterise.

Regression test

Register the existing EasyGL SpriteFont fixtures (single glyph, multi-glyph spacing) for each missing family that supports textures.

Blast radius

Text output on the listed renderers: glyph placement, filtering and colour are unproven there.

Workaround

No workaround is known.