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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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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_vertical_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 vertical 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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/* ystart y-coord of top endpoint */ |
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/* yend y-coord of bottom endpoint */ |
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/* xpos x-coord of left edge */ |
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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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/* RELEASE HISTORY */ |
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/* */ |
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/* DATE NAME DESCRIPTION */ |
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/* */ |
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/* 12-31-2020 Kenneth Maxwell Initial Version 6.1.3 */ |
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/* */ |
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/**************************************************************************/ |
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VOID _gx_display_driver_16bpp_rotated_vertical_pattern_line_draw(GX_DRAW_CONTEXT *context, INT ystart, INT yend, INT xpos) |
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{ |
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INT row; |
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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 = yend - ystart + 1; |
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/* pick up starting 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 scanline */ |
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rowstart += (context -> gx_draw_context_canvas -> gx_canvas_x_resolution - xpos - 1) * context -> gx_draw_context_pitch; |
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/* offset into starting pixel */ |
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rowstart += ystart; |
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} |
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else |
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{ |
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/* calculate start of scanline */ |
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rowstart += xpos * context -> gx_draw_context_pitch; |
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/* offset into starting pixel */ |
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rowstart += (context -> gx_draw_context_canvas -> gx_canvas_y_resolution - yend - 1); |
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} |
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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 left to right */ |
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✓✓ |
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for (row = 0; row < len; row++) |
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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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mask >>= 1; |
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✓✓ |
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if (!mask) |
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{ |
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mask = 0x80000000; |
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} |
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/* advance to the right */ |
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put++; |
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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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