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[Feat] (MG_Impl): give the by-name texture image queries their error set

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glGetTextureImage resolved a texture by name and went straight to the read,
skipping every object-level rule glGetTexImage enforces through
GetTexImage_State - and on DirectVulkan it skipped the level checks in
CopyTextureImageToClientOrPBO_State as well, because that backend answers
GetTextureImage itself. Fifteen of the sixteen conditions in
direct_state_access.textures_image_query_errors went unreported.

The object-level half of that error set now lives in ValidateTextureImageQuery
and both entry points run it. Three rules are new rather than merely relocated:

- Multisample and buffer textures are not in the accepted target list; neither
  has a single image to return.
- The destination-size checks (bufSize, and the span written into a bound pixel
  pack buffer) move ahead of the read. They existed, but downstream of it, where
  any early bail-out - an unmapped level, a pack step that declines the format -
  swallowed them. Both measure the tightly packed span summed over the object's
  faces, which is the least a query can produce, so nothing that would have fit
  is rejected.
- IsDepthLikeInternalFormat had no case for StencilIndex8, so a colour client
  format read back against a stencil-only texture looked like a matching pair.

glGetCompressedTextureImage was a do-nothing stub. It validates the name and the
level, then reports INVALID_OPERATION: no format MobileGL can hold is
compressed, and answering GL_NO_ERROR without writing would hand the caller
stale memory - the same reasoning GetCompressedTexImage_State already follows.

Takes direct_state_access.textures_image_query_errors from failing to passing on
both backends.
This commit is contained in:
BZLZHH
2026-08-05 01:46:10 -04:00
parent 7d6f6603c1
commit 31ea6aa5a3
4 changed files with 159 additions and 62 deletions
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MobileGL/MG_Impl/GLImpl/Exporting/Definitions.cpp
+1 -1
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@@ -1074,7 +1074,7 @@ DECLARE_GL_FUNCTION_HEAD(void, TextureParameteriv, GLuint texture, GLenum pname,
DECLARE_GL_FUNCTION_HEAD(void, GenerateTextureMipmap, GLuint texture) DECLARE_GL_FUNCTION_END_NO_RETURN(void, GenerateTextureMipmap, texture)
DECLARE_GL_FUNCTION_HEAD(void, BindTextureUnit, GLuint unit, GLuint texture) DECLARE_GL_FUNCTION_END_NO_RETURN(void, BindTextureUnit, unit, texture)
DECLARE_GL_FUNCTION_HEAD(void, GetTextureImage, GLuint texture, GLint level, GLenum format, GLenum type, GLsizei bufSize, void* pixels) DECLARE_GL_FUNCTION_END_NO_RETURN(void, GetTextureImage, texture, level, format, type, bufSize, pixels)
DECLARE_GL_FUNCTION_STUB_HEAD(void, GetCompressedTextureImage, GLuint texture, GLint level, GLsizei bufSize, void* pixels) DECLARE_GL_FUNCTION_STUB_END_NO_RETURN(void, GetCompressedTextureImage, texture, level, bufSize, pixels)
DECLARE_GL_FUNCTION_HEAD(void, GetCompressedTextureImage, GLuint texture, GLint level, GLsizei bufSize, void* pixels) DECLARE_GL_FUNCTION_END_NO_RETURN(void, GetCompressedTextureImage, texture, level, bufSize, pixels)
DECLARE_GL_FUNCTION_HEAD(void, GetTextureLevelParameterfv, GLuint texture, GLint level, GLenum pname, GLfloat* params) DECLARE_GL_FUNCTION_END_NO_RETURN(void, GetTextureLevelParameterfv, texture, level, pname, params)
DECLARE_GL_FUNCTION_HEAD(void, GetTextureLevelParameteriv, GLuint texture, GLint level, GLenum pname, GLint* params) DECLARE_GL_FUNCTION_END_NO_RETURN(void, GetTextureLevelParameteriv, texture, level, pname, params)
DECLARE_GL_FUNCTION_HEAD(void, GetTextureParameterfv, GLuint texture, GLenum pname, GLfloat* params) DECLARE_GL_FUNCTION_END_NO_RETURN(void, GetTextureParameterfv, texture, pname, params)