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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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#include "gx_system.h" |
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#include "gx_utility.h" |
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#if defined(GX_ARC_DRAWING_SUPPORT) |
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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_rotated_circle_fill 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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/* Display driver fill circle. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* context Drawing context */ |
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/* xcenter x-coord of center of circle */ |
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/* ycenter y-coord of center of circle */ |
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/* r Radius of circle */ |
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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_horizontal_line_draw] */ |
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/* Basic display driver */ |
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/* horizontal line draw routine*/ |
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/* [gx_display_driver_horizontal_pixelmap_line_draw] */ |
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/* Basic display driver */ |
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/* horizontal pixelmap line */ |
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/* draw function */ |
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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_generic_rotated_circle_fill(GX_DRAW_CONTEXT *context, INT xcenter, INT ycenter, UINT r) |
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{ |
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GX_DISPLAY *display; |
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GX_BRUSH *brush; |
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GX_RECTANGLE *clip; |
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INT ypos; |
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INT curx; |
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INT cury; |
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INT xmin; |
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INT xmax; |
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INT yi; |
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INT x1; |
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INT y1; |
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INT y2; |
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INT width; |
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INT loop; |
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INT skip_line; |
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GX_PIXELMAP *pixelmap = GX_NULL; |
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GX_FILL_PIXELMAP_INFO info; |
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INT *pLineEnds; |
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INT Index; |
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GX_BYTE sign[4][2] = {{1, 1}, {-1, 1}, {1, 1}, {-1, 1}}; |
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INT error; |
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GX_COLOR fill_color; |
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GX_BYTE xsign; |
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display = context -> gx_draw_context_display; |
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clip = context -> gx_draw_context_clip; |
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brush = &context -> gx_draw_context_brush; |
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✓✓ |
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if (brush -> gx_brush_style & GX_BRUSH_PIXELMAP_FILL) |
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{ |
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✓✓ |
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if (brush -> gx_brush_pixelmap == GX_NULL) |
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{ |
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/* Nothing should be drawn if pixelmap isn't set with GX_BRUSH_PIXELMAP_FILL style. */ |
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return; |
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} |
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pixelmap = brush -> gx_brush_pixelmap; |
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✓✓ |
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if (pixelmap -> gx_pixelmap_format != display -> gx_display_color_format) |
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{ |
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/* Display driver only support its native format pixelmap.*/ |
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/* Nothing should be drawn if pixelmap format isn't support. */ |
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return; |
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} |
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memset(&info, 0, sizeof(GX_FILL_PIXELMAP_INFO)); |
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/* If filling pixelmap, set fill pixelmap info. */ |
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info.pixelmap = pixelmap; |
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info.current_pixel_ptr = (GX_UBYTE *)pixelmap -> gx_pixelmap_data; |
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✓✓ |
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if (pixelmap -> gx_pixelmap_aux_data_size) |
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{ |
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info.current_aux_ptr = (GX_UBYTE *)pixelmap -> gx_pixelmap_aux_data; |
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} |
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} |
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xmin = xcenter - (INT)r; |
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xmax = xcenter + (INT)r; |
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/* Calculate minimum y line. */ |
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✓✓ |
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if (clip -> gx_rectangle_left > xmin) |
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{ |
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xmin = clip -> gx_rectangle_left; |
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} |
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/* Calculat maximum y line. */ |
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✓✓ |
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if (clip -> gx_rectangle_right < xmax) |
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{ |
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xmax = clip -> gx_rectangle_right; |
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} |
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width = xmax - xmin + 1; |
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pLineEnds = _gx_system_scratchpad; |
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/* default the point array to being off the screen on both sides: */ |
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✓✓ |
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for (loop = 0; loop < width * 2; loop += 2) |
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{ |
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pLineEnds[loop] = 2000; |
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pLineEnds[loop + 1] = 0; |
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} |
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curx = 0; |
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cury = (INT)r; |
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error = 0; |
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/* For shapes pixelmap-fill driver function, it must fill shapes line by line from up to bottom. |
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So this contains two steps here: first, calculate the boudary point of circle; Second, draw pixelmap line by line. */ |
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✓✓ |
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while (curx <= cury) |
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{ |
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✓✓ |
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for (loop = 0; loop < 4; loop++) |
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{ |
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/* Upper half part. */ |
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✓✓ |
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if (loop < 2) |
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{ |
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x1 = curx * sign[loop][0]; |
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y1 = (cury - 1) * sign[loop][1]; |
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} |
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/* lower half part. */ |
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else |
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{ |
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x1 = (cury - 1) * sign[loop][0]; |
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y1 = curx * sign[loop][1]; |
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} |
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y2 = -y1; |
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y1 += ycenter; |
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y2 += ycenter; |
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x1 += xcenter; |
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✓✓✓✓
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if ((x1 >= xmin) && (x1 <= xmax)) |
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{ |
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✓✓ |
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if (y1 > y2) |
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{ |
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GX_SWAP_VALS(y1, y2); |
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} |
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✓✓ |
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if (y1 < clip -> gx_rectangle_top) |
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{ |
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y1 = clip -> gx_rectangle_top; |
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} |
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✓✓ |
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if (y2 > clip -> gx_rectangle_bottom) |
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{ |
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y2 = clip -> gx_rectangle_bottom; |
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} |
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Index = (x1 - xmin) << 1; |
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pLineEnds[Index] = y1; |
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pLineEnds[Index + 1] = y2; |
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} |
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} |
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curx++; |
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yi = (INT)(r * r) - curx * curx; |
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error = (cury << 8) - (INT)(_gx_utility_math_sqrt((UINT)(yi << 10)) << 3); |
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✓✓ |
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while (error >= 255) |
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{ |
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error -= 255; |
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cury--; |
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} |
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} |
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✓✓ |
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if (pixelmap) |
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{ |
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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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skip_line = (xmax - (xcenter - (INT)r) + 1) % pixelmap -> gx_pixelmap_width; |
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✓✓ |
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if (skip_line) |
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{ |
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skip_line = pixelmap -> gx_pixelmap_width - skip_line; |
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} |
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x1 = xmax; |
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xsign = -1; |
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Index = (width - 1) * 2; |
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} |
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else |
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{ |
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skip_line = (xmin - clip -> gx_rectangle_left); |
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x1 = xmin; |
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xsign = 1; |
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Index = 0; |
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} |
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✓✓ |
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if (skip_line) |
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{ |
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info.draw = GX_FALSE; |
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✓✓ |
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while (skip_line--) |
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{ |
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display -> gx_display_driver_horizontal_pixelmap_line_draw(context, 0, 0, 0, &info); |
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} |
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} |
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info.draw = GX_TRUE; |
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ypos = ycenter - (INT)r; |
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✓✓ |
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for (curx = xmin; curx <= xmax; curx++) |
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{ |
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✓✓ |
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if (pLineEnds[Index] <= pLineEnds[Index + 1]) |
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{ |
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info.x_offset = pLineEnds[Index] - ypos; |
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display -> gx_display_driver_horizontal_pixelmap_line_draw(context, pLineEnds[Index], pLineEnds[Index + 1], x1, &info); |
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} |
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x1 += xsign; |
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Index += xsign; |
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Index += xsign; |
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} |
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} |
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else |
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{ |
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Index = 0; |
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fill_color = brush -> gx_brush_fill_color; |
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✓✓ |
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for (curx = xmin; curx <= xmax; curx++) |
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{ |
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✓✓ |
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if (pLineEnds[Index] <= pLineEnds[Index + 1]) |
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{ |
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display -> gx_display_driver_vertical_line_draw(context, pLineEnds[Index], pLineEnds[Index + 1], curx, 1, fill_color); |
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} |
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Index += 2; |
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} |
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} |
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} |
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#endif |
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