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/*
* Copyright 2022 Michael Drake <tlsa@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Internal core bitmap interface.
*/
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include "utils/log.h"
#include "utils/errors.h"
#include "desktop/bitmap.h"
#include "desktop/gui_internal.h"
/** The client bitmap format. */
bitmap_fmt_t bitmap_fmt;
/** The client bitmap colour channel layout. */
struct bitmap_colour_layout bitmap_layout;
/* Exported function, documented in include/netsurf/bitmap.h */
void bitmap_set_format(const bitmap_fmt_t *bitmap_format)
{
bitmap_fmt = *bitmap_format;
bitmap_fmt.layout = bitmap_sanitise_bitmap_layout(bitmap_fmt.layout);
bitmap_layout = bitmap__get_colour_layout(&bitmap_fmt);
}
/* Exported function, documented in desktop/bitmap.h */
void bitmap_format_convert(void *bitmap,
const bitmap_fmt_t *fmt_from,
const bitmap_fmt_t *fmt_to)
{
int width = guit->bitmap->get_width(bitmap);
int height = guit->bitmap->get_height(bitmap);
uint8_t *buffer = guit->bitmap->get_buffer(bitmap);
size_t rowstride = guit->bitmap->get_rowstride(bitmap);
struct bitmap_colour_layout to = bitmap__get_colour_layout(fmt_to);
struct bitmap_colour_layout from = bitmap__get_colour_layout(fmt_from);
NSLOG(netsurf, DEEPDEBUG, "Bitmap format conversion (%u --> %u)",
fmt_from->layout, fmt_to->layout);
for (int y = 0; y < height; y++) {
uint8_t *row = buffer;
for (int x = 0; x < width; x++) {
const uint32_t px = *((uint32_t *)(void *) row);
row[to.r] = ((const uint8_t *) &px)[from.r];
row[to.g] = ((const uint8_t *) &px)[from.g];
row[to.b] = ((const uint8_t *) &px)[from.b];
row[to.a] = ((const uint8_t *) &px)[from.a];
row += sizeof(uint32_t);
}
buffer += rowstride;
}
}
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