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nv2a/gl: Allocate only needed size for inline arrays

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Some HW/driver combinations appear to slow down dramatically when using very
large GL buffers. Since the GL buffer supporting inline arrays is allocated
after the guest `END`, the total size needed is known and the buffer may be
sized appropriately.

It would be good to test performance in games that use relatively large inline
arrays (e.g., "King of Fighters 2003").

Fixes #2301
This commit is contained in:
Erik Abair
2025-07-20 16:59:31 -07:00
committed by GitHub
parent 8f29452ca9
commit 196726b898
1 changed files with 4 additions and 4 deletions
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hw/xbox/nv2a/pgraph/gl/vertex.c
+4 -4
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@@ -223,9 +223,9 @@ unsigned int pgraph_gl_bind_inline_array(NV2AState *d)
nv2a_profile_inc_counter(NV2A_PROF_GEOM_BUFFER_UPDATE_2);
glBindBuffer(GL_ARRAY_BUFFER, r->gl_inline_array_buffer);
glBufferData(GL_ARRAY_BUFFER, NV2A_MAX_BATCH_LENGTH * sizeof(uint32_t),
NULL, GL_STREAM_DRAW);
glBufferSubData(GL_ARRAY_BUFFER, 0, index_count * vertex_size, pg->inline_array);
GLsizeiptr buffer_size = index_count * vertex_size;
glBufferData(GL_ARRAY_BUFFER, buffer_size, NULL, GL_STREAM_DRAW);
glBufferSubData(GL_ARRAY_BUFFER, 0, buffer_size, pg->inline_array);
pgraph_gl_bind_vertex_attributes(d, 0, index_count-1, true, vertex_size,
index_count-1);
@@ -308,4 +308,4 @@ void pgraph_gl_finalize_buffers(PGRAPHState *pg)
glDeleteVertexArrays(1, &r->gl_vertex_array);
r->gl_vertex_array = 0;
}
}