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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_8bpp_vertical_line_draw PORTABLE C */ |
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/* 6.1 */ |
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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 8bpp color format vertical line draw 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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/* width width of the line */ |
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/* color Color of line to draw */ |
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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_vertical_line_alpha_draw */ |
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/* Basic display driver vertical */ |
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/* alpha 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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/* */ |
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/**************************************************************************/ |
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528681 |
VOID _gx_display_driver_8bpp_vertical_line_draw(GX_DRAW_CONTEXT *context, INT ystart, INT yend, INT xpos, INT width, GX_COLOR color) |
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{ |
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INT row; |
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INT column; |
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GX_UBYTE *put; |
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GX_UBYTE *rowstart; |
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INT len = yend - ystart + 1; |
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#if defined GX_BRUSH_ALPHA_SUPPORT |
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GX_UBYTE alpha; |
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528681 |
alpha = context -> gx_draw_context_brush.gx_brush_alpha; |
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✓✓ |
528681 |
if (alpha == 0) |
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{ |
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/* Nothing to drawn. Just return. */ |
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return; |
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} |
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✓✓ |
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if (alpha != 0xff) |
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{ |
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✓✓ |
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if (context -> gx_draw_context_display -> gx_display_color_format != GX_COLOR_FORMAT_8BIT_PACKED_PIXEL) |
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{ |
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/* Alpha blend is not supported for palette driver. */ |
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return; |
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} |
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_gx_display_driver_vertical_line_alpha_draw(context, ystart, yend, xpos, width, color, alpha); |
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return; |
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} |
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#endif |
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/* pick up starting address of canvas memory */ |
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rowstart = (GX_UBYTE *)context -> gx_draw_context_memory; |
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/* calculate start of scanline */ |
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rowstart += context -> gx_draw_context_pitch * ystart; |
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/* offset into starting pixel */ |
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rowstart += xpos; |
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/* draw line from top to bottom */ |
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✓✓ |
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for (row = 0; row < len; row++) |
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{ |
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put = rowstart; |
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/* draw line width from left to right */ |
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✓✓ |
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for (column = 0; column < width; column++) |
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{ |
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*put++ = (GX_UBYTE)color; |
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} |
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/* advance to the next scaneline */ |
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rowstart += context -> gx_draw_context_pitch; |
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} |
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} |