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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_utility.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_generic_simple_wide_line_draw 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 display driver function for non-aliased wide line. */ |
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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 endpoint */ |
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/* ystart y-coord of endpoint */ |
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/* xend x-coord of endpoint */ |
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/* yend y-coord of endpoint */ |
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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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/* _gx_display_driver_generic_wide_line_points_calculate */ |
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/* Calculate corners of wide line*/ |
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/* _gx_display_driver_generic_filled_circle_draw */ |
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/* Basic display driver solid */ |
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/* circle draw function */ |
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/* _gx_display_driver_generic_wide_line_fill */ |
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/* Basic display driver wide */ |
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/* line draw function */ |
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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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/* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */ |
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/* 09-30-2020 Kenneth Maxwell Modified comment(s), */ |
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/* resulting in version 6.1 */ |
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/* 12-31-2020 Kenneth Maxwell Modified comment(s), */ |
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/* supported display rotation, */ |
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/* resulting in version 6.1.3 */ |
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/* */ |
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/**************************************************************************/ |
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VOID _gx_display_driver_generic_simple_wide_line_draw(GX_DRAW_CONTEXT *context, INT xstart, INT ystart, |
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INT xend, INT yend) |
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{ |
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GX_DISPLAY *display = context -> gx_draw_context_display; |
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GX_FIXED_POINT *line_points; |
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INT brush_width = context -> gx_draw_context_brush.gx_brush_width; |
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GX_RECTANGLE clip_rect; |
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GX_FIXED_VAL sxcenter; |
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GX_FIXED_VAL sycenter; |
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GX_FIXED_VAL excenter; |
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GX_FIXED_VAL eycenter; |
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#if defined(GX_BRUSH_ALPHA_SUPPORT) |
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GX_UBYTE old_alpha; |
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old_alpha = context -> gx_draw_context_brush.gx_brush_alpha; |
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✓✓ |
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if (context -> gx_draw_context_brush.gx_brush_style & GX_BRUSH_ROUND) |
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{ |
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context -> gx_draw_context_brush.gx_brush_alpha = GX_ALPHA_VALUE_OPAQUE; |
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} |
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#endif |
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✓✓✓✓
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if ((context -> gx_draw_context_brush.gx_brush_style & GX_BRUSH_ROUND) && |
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(brush_width > 2)) |
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{ |
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sxcenter = GX_FIXED_VAL_MAKE(xstart); |
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sycenter = GX_FIXED_VAL_MAKE(ystart); |
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excenter = GX_FIXED_VAL_MAKE(xend); |
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eycenter = GX_FIXED_VAL_MAKE(yend); |
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✓✓ |
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if (!(brush_width & 0x01)) |
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{ |
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✓✓ |
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if (ystart == yend) |
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{ |
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/* Horizontal line. */ |
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sycenter -= GX_FIXED_VAL_HALF; |
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eycenter -= GX_FIXED_VAL_HALF; |
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} |
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✓✓ |
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else if (xstart == xend) |
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{ |
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/* Vertical line. */ |
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sxcenter -= GX_FIXED_VAL_HALF; |
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excenter -= GX_FIXED_VAL_HALF; |
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} |
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} |
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_gx_display_driver_generic_filled_circle_draw(context, sxcenter, sycenter, |
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GX_FIXED_VAL_MAKE(brush_width) >> 1); |
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_gx_display_driver_generic_filled_circle_draw(context, excenter, eycenter, |
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GX_FIXED_VAL_MAKE(brush_width) >> 1); |
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} |
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✓✓ |
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if (ystart == yend) |
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{ |
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/* Horizontal line. */ |
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✓✓ |
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if (xstart > xend) |
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{ |
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GX_SWAP_VALS(xstart, xend); |
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} |
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clip_rect.gx_rectangle_left = (GX_VALUE)xstart; |
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clip_rect.gx_rectangle_right = (GX_VALUE)xend; |
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clip_rect.gx_rectangle_top = (GX_VALUE)(ystart - (brush_width >> 1)); |
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clip_rect.gx_rectangle_bottom = (GX_VALUE)(clip_rect.gx_rectangle_top + brush_width - 1); |
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✓✓ |
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if (_gx_utility_rectangle_overlap_detect(&clip_rect, context -> gx_draw_context_clip, &clip_rect)) |
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{ |
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display -> gx_display_driver_horizontal_line_draw(context, |
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clip_rect.gx_rectangle_left, |
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clip_rect.gx_rectangle_right, |
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clip_rect.gx_rectangle_top, |
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clip_rect.gx_rectangle_bottom - clip_rect.gx_rectangle_top + 1, |
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context -> gx_draw_context_brush.gx_brush_line_color); |
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} |
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} |
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✓✓ |
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else if (xstart == xend) |
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{ |
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/* Vertical line. */ |
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✓✓ |
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if (ystart > yend) |
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{ |
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GX_SWAP_VALS(ystart, yend); |
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} |
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clip_rect.gx_rectangle_left = (GX_VALUE)(xstart - (brush_width >> 1)); |
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clip_rect.gx_rectangle_right = (GX_VALUE)(clip_rect.gx_rectangle_left + brush_width - 1); |
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clip_rect.gx_rectangle_top = (GX_VALUE)ystart; |
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clip_rect.gx_rectangle_bottom = (GX_VALUE)yend; |
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✓✓ |
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if (_gx_utility_rectangle_overlap_detect(&clip_rect, context -> gx_draw_context_clip, &clip_rect)) |
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{ |
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display -> gx_display_driver_vertical_line_draw(context, |
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clip_rect.gx_rectangle_top, |
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clip_rect.gx_rectangle_bottom, |
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clip_rect.gx_rectangle_left, |
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clip_rect.gx_rectangle_right - clip_rect.gx_rectangle_left + 1, |
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context -> gx_draw_context_brush.gx_brush_line_color); |
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} |
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} |
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else |
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{ |
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/* calcualte the corners of this line, save them |
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to our points array |
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*/ |
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line_points = _gx_display_driver_generic_wide_line_points_calculate(context, xstart, ystart, |
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xend, yend, brush_width, GX_FALSE); |
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✓✓ |
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if (display -> gx_display_rotation_angle) |
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{ |
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_gx_display_driver_generic_rotated_wide_line_fill(context, line_points); |
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} |
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else |
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{ |
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_gx_display_driver_generic_wide_line_fill(context, line_points); |
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} |
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} |
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#if defined(GX_BRUSH_ALPHA_SUPPORT) |
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context -> gx_draw_context_brush.gx_brush_alpha = old_alpha; |
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#endif |
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} |
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