HelenOS sources

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This source file includes following definitions.
attrs_rgb
draw_char
output_ddev_yield
output_ddev_claim
output_ddev_get_dimensions
output_ddev_get_caps
output_ddev_char_update
output_ddev_cursor_update
output_ddev_flush
output_ddev_init
/*
 * Copyright (c) 2024 Jiri Svoboda
 * Copyright (c) 2008 Martin Decky
 * Copyright (c) 2006 Jakub Vana
 * Copyright (c) 2006 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup output
 * @{
 */

#include <ddev.h>
#include <errno.h>
#include <fbfont/font-8x16.h>
#include <gfx/bitmap.h>
#include <gfx/color.h>
#include <gfx/coord.h>
#include <gfx/context.h>
#include <gfx/render.h>
#include <io/chargrid.h>
#include <io/pixelmap.h>
#include <stdlib.h>
#include "../output.h"
#include "ddev.h"

#define KFB_DDEV_NAME "devices/\\virt\\kfb\\kfb"

typedef struct {
        gfx_context_t *gc;

        sysarg_t cols;
        sysarg_t rows;

        uint8_t style_normal;
        uint8_t style_inverted;

        gfx_bitmap_t *bitmap;
        pixelmap_t pixelmap;
        gfx_rect_t dirty;

        sysarg_t curs_col;
        sysarg_t curs_row;
        bool curs_visible;
} output_ddev_t;

static pixel_t color_table[16] = {
        [COLOR_BLACK]       = 0x000000,
        [COLOR_BLUE]        = 0x0000f0,
        [COLOR_GREEN]       = 0x00f000,
        [COLOR_CYAN]        = 0x00f0f0,
        [COLOR_RED]         = 0xf00000,
        [COLOR_MAGENTA]     = 0xf000f0,
        [COLOR_YELLOW]      = 0xf0f000,
        [COLOR_WHITE]       = 0xf0f0f0,

        [COLOR_BLACK + 8]   = 0x000000,
        [COLOR_BLUE + 8]    = 0x0000ff,
        [COLOR_GREEN + 8]   = 0x00ff00,
        [COLOR_CYAN + 8]    = 0x00ffff,
        [COLOR_RED + 8]     = 0xff0000,
        [COLOR_MAGENTA + 8] = 0xff00ff,
        [COLOR_YELLOW + 8]  = 0xffff00,
        [COLOR_WHITE + 8]   = 0xffffff,
};

static void attrs_rgb(char_attrs_t attrs, pixel_t *bgcolor, pixel_t *fgcolor)
{
        switch (attrs.type) {
        case CHAR_ATTR_STYLE:
                switch (attrs.val.style) {
                case STYLE_NORMAL:
                        *bgcolor = color_table[COLOR_WHITE];
                        *fgcolor = color_table[COLOR_BLACK];
                        break;
                case STYLE_EMPHASIS:
                        *bgcolor = color_table[COLOR_WHITE];
                        *fgcolor = color_table[COLOR_RED];
                        break;
                case STYLE_INVERTED:
                        *bgcolor = color_table[COLOR_BLACK];
                        *fgcolor = color_table[COLOR_WHITE];
                        break;
                case STYLE_SELECTED:
                        *bgcolor = color_table[COLOR_RED];
                        *fgcolor = color_table[COLOR_WHITE];
                        break;
                }
                break;
        case CHAR_ATTR_INDEX:
                *bgcolor = color_table[(attrs.val.index.bgcolor & 7) |
                    ((attrs.val.index.attr & CATTR_BRIGHT) ? 8 : 0)];
                *fgcolor = color_table[(attrs.val.index.fgcolor & 7) |
                    ((attrs.val.index.attr & CATTR_BRIGHT) ? 8 : 0)];
                break;
        case CHAR_ATTR_RGB:
                *bgcolor = attrs.val.rgb.bgcolor;
                *fgcolor = attrs.val.rgb.fgcolor;
                break;
        }
}

/** Draw the character at the specified position.
 *
 * @param field Character field.
 * @param col   Horizontal screen position.
 * @param row   Vertical screen position.
 *
 */
static void draw_char(output_ddev_t *ddev, charfield_t *field,
    sysarg_t col, sysarg_t row)
{
        pixel_t fgcolor;
        pixel_t bgcolor;
        pixel_t pcolor;
        pixel_t tmp;
        gfx_rect_t rect;
        gfx_rect_t ndrect;
        gfx_coord_t x, y;
        bool inverted;
        uint32_t glyph;

        fgcolor = bgcolor = 0;
        attrs_rgb(field->attrs, &bgcolor, &fgcolor);

        inverted = (col == ddev->curs_col) && (row == ddev->curs_row) &&
            ddev->curs_visible;

        if (inverted) {
                /* Swap foreground and background colors */
                tmp = bgcolor;
                bgcolor = fgcolor;
                fgcolor = tmp;
        }

        rect.p0.x = FONT_WIDTH * col;
        rect.p0.y = FONT_SCANLINES * row;
        rect.p1.x = FONT_WIDTH * (col + 1);
        rect.p1.y = FONT_SCANLINES * (row + 1);

        glyph = fb_font_glyph(field->ch, NULL);

        for (y = 0; y < FONT_SCANLINES; y++) {
                for (x = 0; x < FONT_WIDTH; x++) {
                        pcolor = fb_font[glyph][y] & (1 << (7 - x)) ?
                            fgcolor : bgcolor;
                        pixelmap_put_pixel(&ddev->pixelmap,
                            rect.p0.x + x, rect.p0.y + y, pcolor);
                }
        }

        /* Compute new dirty rectangle */
        gfx_rect_envelope(&ddev->dirty, &rect, &ndrect);
        ddev->dirty = ndrect;
}

static errno_t output_ddev_yield(outdev_t *dev)
{
        return EOK;
}

static errno_t output_ddev_claim(outdev_t *dev)
{
        return EOK;
}

static void output_ddev_get_dimensions(outdev_t *dev, sysarg_t *cols, sysarg_t *rows)
{
        output_ddev_t *ddev = (output_ddev_t *) dev->data;

        *cols = ddev->cols;
        *rows = ddev->rows;
}

static console_caps_t output_ddev_get_caps(outdev_t *dev)
{
        return (CONSOLE_CAP_CURSORCTL | CONSOLE_CAP_STYLE |
            CONSOLE_CAP_INDEXED | CONSOLE_CAP_RGB);
}

static void output_ddev_char_update(outdev_t *dev, sysarg_t col, sysarg_t row)
{
        output_ddev_t *ddev = (output_ddev_t *) dev->data;

        charfield_t *field =
            chargrid_charfield_at(dev->backbuf, col, row);

        draw_char(ddev, field, col, row);
}

static void output_ddev_cursor_update(outdev_t *dev, sysarg_t prev_col,
    sysarg_t prev_row, sysarg_t col, sysarg_t row, bool visible)
{
        output_ddev_t *ddev = (output_ddev_t *) dev->data;

        ddev->curs_col = col;
        ddev->curs_row = row;
        ddev->curs_visible = visible;

        output_ddev_char_update(dev, prev_col, prev_row);
        output_ddev_char_update(dev, col, row);
}

static void output_ddev_flush(outdev_t *dev)
{
        output_ddev_t *ddev = (output_ddev_t *) dev->data;

        (void) gfx_bitmap_render(ddev->bitmap, &ddev->dirty, NULL);

        ddev->dirty.p0.x = 0;
        ddev->dirty.p0.y = 0;
        ddev->dirty.p1.x = 0;
        ddev->dirty.p1.y = 0;
}

static outdev_ops_t output_ddev_ops = {
        .yield = output_ddev_yield,
        .claim = output_ddev_claim,
        .get_dimensions = output_ddev_get_dimensions,
        .get_caps = output_ddev_get_caps,
        .cursor_update = output_ddev_cursor_update,
        .char_update = output_ddev_char_update,
        .flush = output_ddev_flush
};

errno_t output_ddev_init(void)
{
        ddev_t *dd = NULL;
        output_ddev_t *ddev = NULL;
        ddev_info_t info;
        gfx_coord2_t dims;
        gfx_context_t *gc;
        gfx_bitmap_params_t params;
        gfx_bitmap_alloc_t alloc;
        gfx_bitmap_t *bitmap = NULL;
        errno_t rc;

        ddev = calloc(1, sizeof(output_ddev_t));
        if (ddev == NULL)
                return ENOMEM;

        rc = ddev_open(KFB_DDEV_NAME, &dd);
        if (rc != EOK) {
                printf("Error opening display device '%s'.", KFB_DDEV_NAME);
                goto error;
        }

        rc = ddev_get_info(dd, &info);
        if (rc != EOK) {
                printf("Error getting information for display device '%s'.",
                    KFB_DDEV_NAME);
                goto error;
        }

        rc = ddev_get_gc(dd, &gc);
        if (rc != EOK) {
                printf("Error getting device context for '%s'.", KFB_DDEV_NAME);
                goto error;
        }

        gfx_bitmap_params_init(&params);
        params.rect = info.rect;

        rc = gfx_bitmap_create(gc, &params, NULL, &bitmap);
        if (rc != EOK) {
                printf("Error creating screen bitmap.\n");
                goto error;
        }

        rc = gfx_bitmap_get_alloc(bitmap, &alloc);
        if (rc != EOK) {
                printf("Error getting bitmap allocation info.\n");
                goto error;
        }

        gfx_rect_dims(&info.rect, &dims);

        ddev->gc = gc;
        ddev->cols = dims.x / FONT_WIDTH;
        ddev->rows = dims.y / FONT_SCANLINES;
        ddev->bitmap = bitmap;
        ddev->pixelmap.width = dims.x;
        ddev->pixelmap.height = dims.y;
        ddev->pixelmap.data = alloc.pixels;

        outdev_t *dev = outdev_register(&output_ddev_ops, (void *) ddev);
        if (dev == NULL) {
                rc = EINVAL;
                goto error;
        }

        return EOK;
error:
        if (dd != NULL)
                ddev_close(dd);
        if (bitmap != NULL)
                gfx_bitmap_destroy(bitmap);
        free(ddev);
        return rc;
}

/** @}
 */
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HelenOS sources

root/uspace/srv/hid/output/port/ddev.c

DEFINITIONS
