mesa/draw: Make sure all the unused fields are initialized to zero
Not initializing prim.indexed caused a few thousand failures on Intel drivers. I also compared the generated assembly with this change and beforea6d3158909
. The code is still somewhat improved, which I am assuming was the original goal. _mesa_DrawArrays, for example, appears to drop an instruction or two... though the body of the function is only one byte shorter. MR !3591 will eventually delete the uninitialized fields. However, I believe that explicitly initializing the whole thing is more future proof. This ensures that if someone adds fields in the future, they will also be initialized. Once the extra fields are removed, the two implementations should generate idential code. Fixes:a6d3158909
("mesa: don't use memset in glDrawArrays") Reviewed-by: Marek Olšák <marek.olsak@amd.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3870> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/merge_requests/3870>
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@ -352,23 +352,22 @@ _mesa_draw_arrays(struct gl_context *ctx, GLenum mode, GLint start,
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GLsizei count, GLuint numInstances, GLuint baseInstance,
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GLuint drawID)
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{
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struct _mesa_prim prim;
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if (skip_validated_draw(ctx))
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return;
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/* OpenGL 4.5 says that primitive restart is ignored with non-indexed
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* draws.
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*/
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prim.begin = 1;
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prim.end = 1;
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prim.mode = mode;
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prim.num_instances = numInstances;
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prim.base_instance = baseInstance;
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prim.draw_id = drawID;
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prim.start = start;
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prim.count = count;
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prim.basevertex = 0;
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struct _mesa_prim prim = {
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.begin = 1,
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.end = 1,
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.mode = mode,
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.num_instances = numInstances,
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.base_instance = baseInstance,
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.draw_id = drawID,
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.start = start,
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.count = count,
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};
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ctx->Driver.Draw(ctx, &prim, 1, NULL,
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GL_TRUE, start, start + count - 1, NULL, 0, NULL);
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