| 308,56 → 308,32 |
|---|
| */ |
| static void vport_scroll(viewport_t *vport, int lines) |
| { |
| unsigned int row, col; |
| |
| /* |
| * Scroll backbuffer. |
| */ |
| |
| if (lines > 0) { |
| memmove(vport->backbuf, vport->backbuf + vport->cols * lines, |
| memcpy(vport->backbuf, vport->backbuf + vport->cols * lines, |
| vport->cols * (vport->rows - lines)); |
| memset(&vport->backbuf[BB_POS(vport, 0, vport->rows - lines)], |
| 0, vport->cols * lines); |
| } else { |
| memmove(vport->backbuf - vport->cols * lines, vport->backbuf, |
| memcpy(vport->backbuf - vport->cols * lines, vport->backbuf, |
| vport->cols * (vport->rows + lines)); |
| memset(vport->backbuf, 0, - vport->cols * lines); |
| } |
| |
| /* |
| * Scroll pixels. |
| /* |
| * Redraw. |
| */ |
| |
| unsigned int dist, height, alines; |
| unsigned int y, ry; |
| uint8_t *sp, *dp; |
| |
| alines = lines > 0 ? lines : -lines; |
| dist = alines * FONT_SCANLINES; |
| height = (vport->rows - alines) * FONT_SCANLINES; |
| |
| if (lines > 0) { |
| dp = &screen.fb_addr[FB_POS(vport->x, vport->y + 0)]; |
| sp = &screen.fb_addr[FB_POS(vport->x, vport->y + dist)]; |
| ry = height; |
| } else { |
| dp = &screen.fb_addr[FB_POS(vport->x, vport->y + dist)]; |
| sp = &screen.fb_addr[FB_POS(vport->x, vport->y + 0)]; |
| ry = 0; |
| for (row = 0; row < vport->rows; row++) { |
| for (col = 0; col < vport->cols; col++) { |
| draw_glyph(vport, false, col, row); |
| } |
| } |
| |
| /* Move pixels line by line. */ |
| for (y = 0; y < height; y++) { |
| memcpy(dp, sp, vport->cols * FONT_WIDTH |
| * screen.pixelbytes); |
| |
| sp += screen.scanline; |
| dp += screen.scanline; |
| } |
| |
| /* Fill emptied area with background color. */ |
| draw_filled_rect(vport->x, vport->y + ry, |
| vport->x + COL2X(vport->cols), vport->y + ry + dist, |
| vport->style.bg_color); |
| } |
| |
| /** Render glyphs |