92 lines
2.6 KiB
C
92 lines
2.6 KiB
C
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/*
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* Common HID report descriptor helpers
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*
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* Copyright 2021 Rémi Bernon for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "controller.h"
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BOOL hid_descriptor_append(struct hid_descriptor *desc, const BYTE *buffer, SIZE_T size)
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{
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BYTE *tmp = desc->data;
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if (desc->size + size > desc->max_size)
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{
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desc->max_size = max(desc->max_size * 3 / 2, desc->size + size);
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if (!desc->data) desc->data = HeapAlloc(GetProcessHeap(), 0, desc->max_size);
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else desc->data = HeapReAlloc(GetProcessHeap(), 0, tmp, desc->max_size);
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}
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if (!desc->data)
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{
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HeapFree(GetProcessHeap(), 0, tmp);
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return FALSE;
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}
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memcpy(desc->data + desc->size, buffer, size);
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desc->size += size;
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return TRUE;
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}
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#include "psh_hid_macros.h"
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BOOL hid_descriptor_begin(struct hid_descriptor *desc, USAGE usage_page, USAGE usage)
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{
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const BYTE template[] =
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{
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USAGE_PAGE(2, usage_page),
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USAGE(2, usage),
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COLLECTION(1, Application),
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USAGE(1, 0),
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};
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memset(desc, 0, sizeof(*desc));
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return hid_descriptor_append(desc, template, sizeof(template));
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}
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BOOL hid_descriptor_end(struct hid_descriptor *desc)
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{
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static const BYTE template[] =
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{
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END_COLLECTION,
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};
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return hid_descriptor_append(desc, template, sizeof(template));
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}
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BOOL hid_descriptor_add_buttons(struct hid_descriptor *desc, USAGE usage_page,
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USAGE usage_min, USAGE usage_max)
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{
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const BYTE template[] =
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{
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USAGE_PAGE(2, usage_page),
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USAGE_MINIMUM(2, usage_min),
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USAGE_MAXIMUM(2, usage_max),
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LOGICAL_MINIMUM(1, 0),
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LOGICAL_MAXIMUM(1, 1),
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PHYSICAL_MINIMUM(1, 0),
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PHYSICAL_MAXIMUM(1, 1),
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REPORT_COUNT(2, usage_max - usage_min + 1),
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REPORT_SIZE(1, 1),
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INPUT(1, Data|Var|Abs),
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};
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return hid_descriptor_append(desc, template, sizeof(template));
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}
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#include "pop_hid_macros.h"
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