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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** GUIX Component */ |
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/** */ |
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/** Display Management (Display) */ |
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/** */ |
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/**************************************************************************/ |
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#define GX_SOURCE_CODE |
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/* Include necessary system files. */ |
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#include "gx_api.h" |
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#include "gx_display.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _gx_display_driver_16bpp_rotated_horizontal_pattern_line_draw */ |
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/* PORTABLE C */ |
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/* 6.1.3 */ |
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/* AUTHOR */ |
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/* */ |
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/* Kenneth Maxwell, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* Generic 16bpp color format rotated horizontal pattern line draw */ |
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/* function. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* context Drawing context */ |
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/* xstart x-coord of left endpoint */ |
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/* xend x-coord of right endpoint */ |
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/* ypos y-coord of line top */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* GUIX Internal Code */ |
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/* */ |
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/**************************************************************************/ |
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VOID _gx_display_driver_16bpp_rotated_horizontal_pattern_line_draw(GX_DRAW_CONTEXT *context, INT xstart, INT xend, INT ypos) |
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{ |
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INT column; |
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USHORT *put; |
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USHORT *rowstart; |
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ULONG pattern; |
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ULONG mask; |
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USHORT on_color; |
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USHORT off_color; |
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INT len = xend - xstart + 1; |
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/* Pick up start address of canvas memory. */ |
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rowstart = (USHORT *)context -> gx_draw_context_memory; |
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✓✓ |
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if (context -> gx_draw_context_display -> gx_display_rotation_angle == GX_SCREEN_ROTATION_CW) |
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{ |
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/* Calculate start of row address. */ |
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rowstart += (context -> gx_draw_context_canvas -> gx_canvas_x_resolution - xstart - 1) * context -> gx_draw_context_pitch; |
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/* Calculate pixel address. */ |
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rowstart += ypos; |
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} |
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else |
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{ |
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/* Calculate start of row address. */ |
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rowstart += xend * context -> gx_draw_context_pitch; |
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/* Calculate pixel address. */ |
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rowstart += (context -> gx_draw_context_canvas -> gx_canvas_y_resolution - ypos - 1); |
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} |
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/* Draw 1-pixel hi lines to fill width. */ |
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/* Pick up the requested pattern and mask. */ |
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pattern = context -> gx_draw_context_brush.gx_brush_line_pattern; |
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mask = context -> gx_draw_context_brush.gx_brush_pattern_mask; |
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on_color = (USHORT)context -> gx_draw_context_brush.gx_brush_line_color; |
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off_color = (USHORT)context -> gx_draw_context_brush.gx_brush_fill_color; |
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put = rowstart; |
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/* Draw line from bottom to top. */ |
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✓✓ |
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for (column = 0; column < len; column++) |
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{ |
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✓✓ |
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if (pattern & mask) |
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{ |
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*put = on_color; |
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} |
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else |
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{ |
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*put = off_color; |
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} |
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put -= context -> gx_draw_context_pitch; |
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mask >>= 1; |
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✓✓ |
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if (!mask) |
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{ |
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/* Set most significant bit to repeat the pattern draw. */ |
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mask = 0x80000000; |
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} |
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} |
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/* Save current masks value back to brush. */ |
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context -> gx_draw_context_brush.gx_brush_pattern_mask = mask; |
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} |
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