image.c

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/*
 * Copyright 2011 John-Mark Bell <jmb@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/>.
 */
 
#include <stdbool.h>
#include <stdlib.h>
 
#include "utils/utils.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "netsurf/plotters.h"
#include "netsurf/bitmap.h"
#include "netsurf/content.h"
#include "desktop/gui_internal.h"
#include "desktop/bitmap.h"
 
#include "image/bmp.h"
#include "image/gif.h"
#include "image/ico.h"
#include "image/jpeg.h"
#include "image/jpegxl.h"
#include "image/nssprite.h"
#include "image/png.h"
#include "image/rsvg.h"
#include "image/svg.h"
#include "image/webp.h"
#include "image/image.h"
 
/**
 * Initialise image content handlers
 *
 * \return NSERROR_OK on success, appropriate error otherwise.
 */
nserror image_init(void)
{
        nserror error = NSERROR_OK;
 
#ifdef WITH_BMP
        error = nsbmp_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
#ifdef WITH_GIF
        error = nsgif_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
#ifdef WITH_BMP
        error = nsico_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
#ifdef WITH_JPEG
        error = nsjpeg_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
#ifdef WITH_JPEGXL
        error = nsjpegxl_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
#ifdef WITH_PNG
        error = nspng_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
#ifdef WITH_NSSPRITE
        error = nssprite_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
        /* Prefer rsvg over libsvgtiny for svgs */
#ifdef WITH_NS_SVG
        error = svg_init();
        if (error != NSERROR_OK)
                return error;
#endif
#ifdef WITH_RSVG
        error = nsrsvg_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
#ifdef WITH_WEBP
        error = nswebp_init();
        if (error != NSERROR_OK)
                return error;
#endif
 
        return error;
}
 
 
bool image_bitmap_plot(struct bitmap *bitmap,
                       struct content_redraw_data *data,
                       const struct rect *clip,
                       const struct redraw_context *ctx)
{
        bitmap_flags_t flags = BITMAPF_NONE;
 
        int width;
        int height;
        unsigned char *pixel;
        plot_style_t fill_style;
        struct rect area;
 
        width = guit->bitmap->get_width(bitmap);
        if (width == 1) {
                height = guit->bitmap->get_height(bitmap);
                if (height == 1) {
                        /* optimise 1x1 bitmap plot */
                        pixel = guit->bitmap->get_buffer(bitmap);
                        fill_style.fill_colour = bitmap_pixel_to_colour(pixel);
 
                        if (guit->bitmap->get_opaque(bitmap) ||
                            ((fill_style.fill_colour & 0xff000000) == 0xff000000)) {
 
                                area = *clip;
 
                                if (data->repeat_x != true) {
                                        area.x0 = data->x;
                                        area.x1 = data->x + data->width;
                                }
 
                                if (data->repeat_y != true) {
                                        area.y0 = data->y;
                                        area.y1 = data->y + data->height;
                                }
 
                                fill_style.stroke_type = PLOT_OP_TYPE_NONE;
                                fill_style.fill_type = PLOT_OP_TYPE_SOLID;
 
                                return (ctx->plot->rectangle(ctx,
                                                             &fill_style,
                                                             &area) == NSERROR_OK);
 
                        } else if ((fill_style.fill_colour & 0xff000000) == 0) {
                                /* transparent pixel used as spacer, skip it */
                                return true;
                        }
                }
        }
 
        /* do the plot */
        if (data->repeat_x)
                flags |= BITMAPF_REPEAT_X;
        if (data->repeat_y)
                flags |= BITMAPF_REPEAT_Y;
 
        return (ctx->plot->bitmap(ctx,
                                  bitmap,
                                  data->x, data->y,
                                  data->width, data->height,
                                  data->background_colour,
                                  flags) == NSERROR_OK);
}