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Line 306... Line 306...
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 * @param lines Number of lines to scroll
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 * @param lines Number of lines to scroll
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 *
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 *
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 */
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 */
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static void vport_scroll(viewport_t *vport, int lines)
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static void vport_scroll(viewport_t *vport, int lines)
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{
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{
- 
 
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    unsigned int row, col;
- 
 
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    /*
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    /*
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     * Scroll backbuffer.
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     * Scroll backbuffer.
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     */
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     */
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    if (lines > 0) {
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    if (lines > 0) {
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        memmove(vport->backbuf, vport->backbuf + vport->cols * lines,
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        memcpy(vport->backbuf, vport->backbuf + vport->cols * lines,
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            vport->cols * (vport->rows - lines));
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            vport->cols * (vport->rows - lines));
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        memset(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
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        memset(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)],
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            0, vport->cols * lines);
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            0, vport->cols * lines);
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    } else {
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    } else {
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        memmove(vport->backbuf - vport->cols * lines, vport->backbuf,
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        memcpy(vport->backbuf - vport->cols * lines, vport->backbuf,
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            vport->cols * (vport->rows + lines));
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            vport->cols * (vport->rows + lines));
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        memset(vport->backbuf, 0, - vport->cols * lines);
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        memset(vport->backbuf, 0, - vport->cols * lines);
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    }
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    }
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    /*
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    /*
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     * Scroll pixels.
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     * Redraw.
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     */
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     */
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    unsigned int dist, height, alines;
 - 
 
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    unsigned int y, ry;
 - 
 
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    uint8_t *sp, *dp;
 - 
 
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 - 
 
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    alines = lines > 0 ? lines : -lines;
 - 
 
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    dist = alines * FONT_SCANLINES;
 - 
 
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    height = (vport->rows - alines) * FONT_SCANLINES;
 - 
 
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 - 
 
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    if (lines > 0) {
 - 
 
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        dp = &screen.fb_addr[FB_POS(vport->x, vport->y + 0)];
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    for (row = 0; row < vport->rows; row++) {
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        sp = &screen.fb_addr[FB_POS(vport->x, vport->y + dist)];
 - 
 
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        ry = height;
 - 
 
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    } else {
 - 
 
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        dp = &screen.fb_addr[FB_POS(vport->x, vport->y + dist)];
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        for (col = 0; col < vport->cols; col++) {
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        sp = &screen.fb_addr[FB_POS(vport->x, vport->y + 0)];
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            draw_glyph(vport, false, col, row);
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        ry = 0;
 - 
 
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    }
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        }
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 - 
 
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    /* Move pixels line by line. */
 - 
 
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    for (y = 0; y < height; y++) {
 - 
 
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        memcpy(dp, sp, vport->cols * FONT_WIDTH
 - 
 
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            * screen.pixelbytes);
 - 
 
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 - 
 
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        sp += screen.scanline;
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        dp += screen.scanline;
 - 
 
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    }
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    }
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 - 
 
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    /* Fill emptied area with background color. */
 - 
 
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    draw_filled_rect(vport->x, vport->y + ry,
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        vport->x + COL2X(vport->cols), vport->y + ry + dist,
 - 
 
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        vport->style.bg_color);
 - 
 
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}
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}
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/** Render glyphs
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/** Render glyphs
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 *
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 *
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 * Convert glyphs from device independent font
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 * Convert glyphs from device independent font