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[Feat] (MG_Impl, DirectGLES): advertise GL_ARB_get_program_binary with no binary format

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glProgramParameteri is not core before GL 4.1, so in the 4.0 context the CTS runs it
only exists through GL_ARB_get_program_binary or GL_ARB_separate_shader_objects.
MobileGL advertised neither, so dEQP's loader left the entry point null - and
KHR-GL40.api.coverage, which registers glProgramParameteri from GL 3.2 upwards, called
straight through the null pointer and took the process down.

GL_NUM_PROGRAM_BINARY_FORMATS was already 0, and the extension explicitly allows an
implementation to support no binary format at all; that is the honest state of things
here, since a MobileGL program is a glslang link plus a per-backend translation with no
serialised form. So the extension is advertised for what it really provides:
glProgramParameteri stores GL_PROGRAM_BINARY_RETRIEVABLE_HINT (reported back by
glGetProgramiv alongside a GL_PROGRAM_BINARY_LENGTH of zero), glGetProgramBinary is the
INVALID_OPERATION the spec requires when that length is zero, and glProgramBinary
rejects every format with INVALID_ENUM and leaves the program's LINK_STATUS false.

Applications that ask for a binary get the documented "no formats" answer and fall
back, which is what they already had to do - only now they can ask.
This commit is contained in:
BZLZHH
2026-08-04 10:27:23 -04:00
parent ff76af9df7
commit 2dcc15bb0e
5 changed files with 89 additions and 4 deletions
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MobileGL/MG_Impl/GLImpl/Program/GL_Program.h
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@@ -138,6 +138,9 @@ namespace MobileGL::MG_Impl::GLImpl {
GLint GetProgramResourceLocationIndex(GLuint program, GLenum programInterface, const GLchar* name);
void ShaderStorageBlockBinding(GLuint program, GLuint storageBlockIndex, GLuint storageBlockBinding);
void ValidateProgram(GLuint program);
void ProgramParameteri(GLuint program, GLenum pname, GLint value);
void GetProgramBinary(GLuint program, GLsizei bufSize, GLsizei* length, GLenum* binaryFormat, void* binary);
void ProgramBinary(GLuint program, GLenum binaryFormat, const void* binary, GLsizei length);
void TransformFeedbackVaryings(GLuint program, GLsizei count, const GLchar* const* varyings, GLenum bufferMode);
void GetTransformFeedbackVarying(GLuint program, GLuint index, GLsizei bufSize, GLsizei* length, GLsizei* size,
GLenum* type, GLchar* name);