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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_system.h" |
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#include "gx_utility.h" |
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#include "gx_display.h" |
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#define DRAW_PIXEL if (alpha & mask) \ |
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{ \ |
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*put = text_color; \ |
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} \ |
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put++; \ |
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mask = mask >> 1; |
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#if defined (GX_BRUSH_ALPHA_SUPPORT) |
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#define BLEND_PIXEL if (alpha & mask) \ |
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{ \ |
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blend_func(context, xval, yval, text_color, brush_alpha); \ |
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} \ |
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xval++; \ |
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mask = mask >> 1; |
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#endif |
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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_glyph_1bit_draw PORTABLE C */ |
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/* 6.1.11 */ |
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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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/* This function draws monochrome font to the 8bpp canvas, clipped */ |
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/* to one viweport. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* context Draw context */ |
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/* draw_area The region bound by the */ |
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/* rectangle where the glyph */ |
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/* is drawn */ |
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/* map_offset X,Y offset into the glyph map */ |
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/* glyph Pointer to the glyph */ |
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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_pixel_blend] Basic display driver pixel */ |
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/* blend 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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/* 04-25-2022 Ting Zhu Modified comment(s), */ |
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/* fixed access violation bug, */ |
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/* resulting in version 6.1.11 */ |
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/* */ |
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/**************************************************************************/ |
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1150498 |
VOID _gx_display_driver_8bpp_glyph_1bit_draw(GX_DRAW_CONTEXT *context, GX_RECTANGLE *draw_area, GX_POINT *map_offset, GX_CONST GX_GLYPH *glyph) |
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{ |
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/* GX_DISPLAY *display;*/ |
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GX_UBYTE *glyph_row; |
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GX_UBYTE *glyph_data; |
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UINT row; |
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UINT pixel_per_row; |
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UINT pixel_in_first_byte; |
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1150498 |
UINT pixel_in_last_byte = 0; |
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GX_UBYTE text_color; |
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UINT y_height; |
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GX_UBYTE alpha; |
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UINT glyph_width; |
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GX_UBYTE *put; |
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UINT num_bytes; |
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UINT num_bits; |
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GX_UBYTE *line_start; |
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GX_UBYTE mask, init_mask; |
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UINT i; |
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1150498 |
GX_UBYTE brush_alpha = 0xff; |
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#if defined (GX_BRUSH_ALPHA_SUPPORT) |
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INT xval, yval; |
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VOID (*blend_func)(GX_DRAW_CONTEXT *, INT, INT, GX_COLOR, GX_UBYTE); |
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1150498 |
brush_alpha = context -> gx_draw_context_brush.gx_brush_alpha; |
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1150498 |
blend_func = context -> gx_draw_context_display -> gx_display_driver_pixel_blend; |
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✓✓ |
1150498 |
if (blend_func == GX_NULL) |
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{ |
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/* Pixel blend function is null means alpha isn't supported in this driver. |
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So set alpha value to 0xff to make it draw the original color in case GX_BRUSH_ALPHA_SUPPORT is defined. */ |
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804583 |
brush_alpha = 0xff; |
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} |
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else |
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{ |
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✓✓ |
345915 |
if (brush_alpha == 0) |
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2880 |
return; |
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} |
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#endif |
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1147618 |
text_color = (GX_UBYTE)context -> gx_draw_context_brush.gx_brush_line_color; |
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1147618 |
pixel_per_row = (UINT)draw_area -> gx_rectangle_right - (UINT)draw_area -> gx_rectangle_left + (UINT)1; |
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/* pickup pointer to current dispaly driver */ |
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/*display = context -> gx_draw_context_display;*/ |
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/* Find the width of the glyph, in terms of bytes */ |
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1147618 |
glyph_width = glyph -> gx_glyph_width; |
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/* Make it byte-aligned. */ |
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1147618 |
glyph_width = (glyph_width + 7) >> 3; |
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/* Compute the number of useful bytes from the glyph this routine is going to use. |
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Because of map_offset, the first byte may contain pixel bits we don't need to draw; |
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And the width of the draw_area may produce part of the last byte in the row to be ignored. */ |
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1147618 |
num_bytes = ((UINT)map_offset -> gx_point_x + pixel_per_row + 7) >> 3; |
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/* Take into account if map_offset specifies the number of bytes to ignore from the beginning of the row. */ |
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1147618 |
num_bytes -= (UINT)(map_offset -> gx_point_x) >> 3; |
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/* Compute the number of pixels to draw from the first byte of the glyph data. */ |
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1147618 |
pixel_in_first_byte = (UINT)(8 - ((map_offset -> gx_point_x) & 0x7)); |
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1147618 |
init_mask = (GX_UBYTE)(1 << (pixel_in_first_byte - 1)); |
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/* Compute the number of pixels to draw from the last byte, if there are more than one byte in a row. */ |
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✓✓ |
1147618 |
if (num_bytes != 1) |
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{ |
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335105 |
pixel_in_last_byte = (map_offset -> gx_point_x + (INT)pixel_per_row) & 0x7; |
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✓✓ |
335105 |
if (pixel_in_last_byte == 0) |
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{ |
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pixel_in_last_byte = 8; |
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} |
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} |
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else |
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{ |
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✓✓ |
812513 |
if ((map_offset -> gx_point_x + (INT)pixel_per_row) < 8) |
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{ |
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561609 |
pixel_in_first_byte = pixel_per_row; |
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} |
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else |
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{ |
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pixel_in_last_byte = 0; |
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} |
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} |
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1147618 |
glyph_row = (GX_UBYTE *)glyph -> gx_glyph_map; |
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✓✓ |
1147618 |
if (map_offset -> gx_point_y) |
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{ |
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glyph_row = glyph_row + ((INT)glyph_width * map_offset -> gx_point_y); |
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} |
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1147618 |
glyph_row += (map_offset -> gx_point_x >> 3); |
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1147618 |
y_height = (UINT)(draw_area -> gx_rectangle_bottom - draw_area -> gx_rectangle_top + 1); |
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✓✓ |
1147618 |
if (brush_alpha == 0xff) |
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{ |
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1144599 |
line_start = (GX_UBYTE *)context -> gx_draw_context_memory; |
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1144599 |
line_start += context -> gx_draw_context_pitch * (draw_area -> gx_rectangle_top); |
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1144599 |
line_start += draw_area -> gx_rectangle_left; |
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✓✓ |
13561453 |
for (row = 0; row < y_height; row++) |
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{ |
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12416854 |
glyph_data = glyph_row; |
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12416854 |
mask = init_mask; |
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12416854 |
num_bits = pixel_in_first_byte; |
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12416854 |
put = line_start; |
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✓✓ |
28771088 |
for (i = 0; i < num_bytes; i++) |
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{ |
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16354234 |
alpha = *(glyph_data++); |
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✓✓✓✓
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16354234 |
if ((i == (num_bytes - 1)) && (num_bytes > 1)) |
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{ |
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3924058 |
num_bits = pixel_in_last_byte; |
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} |
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✓✓✓✓
✓✓✓✓
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16354234 |
switch (num_bits) |
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{ |
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6725530 |
case 8: |
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✓✓ |
6725530 |
DRAW_PIXEL; |
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/* fallthrough */ |
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8243002 |
case 7: |
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✓✓ |
8243002 |
DRAW_PIXEL; |
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/* fallthrough */ |
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9846821 |
case 6: |
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✓✓ |
9846821 |
DRAW_PIXEL; |
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/* fallthrough */ |
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10119233 |
case 5: |
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✓✓ |
10119233 |
DRAW_PIXEL; |
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/* fallthrough */ |
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10428073 |
case 4: |
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✓✓ |
10428073 |
DRAW_PIXEL; |
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/* fallthrough */ |
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10739367 |
case 3: |
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✓✓ |
10739367 |
DRAW_PIXEL; |
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/* fallthrough */ |
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14289033 |
case 2: |
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✓✓ |
14289033 |
DRAW_PIXEL; |
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/* fallthrough */ |
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16354234 |
default: |
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✓✓ |
16354234 |
if (alpha & mask) |
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{ |
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9105132 |
*put = text_color; |
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} |
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16354234 |
put++; |
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16354234 |
break; |
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} |
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16354234 |
num_bits = 8; |
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16354234 |
mask = 0x80; |
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} |
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12416854 |
glyph_row += glyph_width; |
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12416854 |
line_start += context -> gx_draw_context_pitch; |
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} |
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} |
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#if defined (GX_BRUSH_ALPHA_SUPPORT) |
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else |
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{ |
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3019 |
yval = draw_area -> gx_rectangle_top; |
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✓✓ |
36627 |
for (row = 0; row < y_height; row++) |
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{ |
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33608 |
xval = draw_area -> gx_rectangle_left; |
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33608 |
glyph_data = glyph_row; |
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33608 |
mask = init_mask; |
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33608 |
num_bits = pixel_in_first_byte; |
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✓✓ |
76382 |
for (i = 0; i < num_bytes; i++) |
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{ |
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42774 |
alpha = *(glyph_data); |
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✓✓✓✓
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42774 |
if ((i == (num_bytes - 1)) && (num_bytes > 1)) |
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{ |
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num_bits = pixel_in_last_byte; |
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} |
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✓✓✓✓
✓✓✓✓
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42774 |
switch (num_bits) |
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{ |
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case 8: |
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✓✓ |
29231 |
BLEND_PIXEL; |
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/* fallthrough */ |
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29257 |
case 7: |
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✓✓ |
29257 |
BLEND_PIXEL; |
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/* fallthrough */ |
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33531 |
case 6: |
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✓✓ |
33531 |
BLEND_PIXEL; |
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/* fallthrough */ |
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33541 |
case 5: |
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✓✓ |
33541 |
BLEND_PIXEL; |
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/* fallthrough */ |
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33853 |
case 4: |
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✓✓ |
33853 |
BLEND_PIXEL; |
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/* fallthrough */ |
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34152 |
case 3: |
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✓✓ |
34152 |
BLEND_PIXEL; |
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/* fallthrough */ |
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37760 |
case 2: |
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✓✓ |
37760 |
BLEND_PIXEL; |
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/* fallthrough */ |
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42774 |
default: |
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✓✓ |
42774 |
if (alpha & mask) |
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{ |
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16611 |
blend_func(context, xval, yval, text_color, brush_alpha); |
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} |
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42774 |
xval++; |
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42774 |
break; |
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} |
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42774 |
glyph_data++; |
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42774 |
num_bits = 8; |
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42774 |
mask = 0x80; |
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} |
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33608 |
glyph_row += glyph_width; |
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33608 |
yval++; |
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} |
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} |
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#endif |
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1147618 |
return; |
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} |
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