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boxcanvas.c
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boxcanvas.c
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// =================================================================================== //
// This program is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// (at your option) any later version. //
// //
// This program is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY; without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with this program. If not, see <https://www.gnu.org/licenses/>. //
// //
// Copyright: Luiz Gustavo Pfitscher e Feldmann, 2020 //
// =================================================================================== //
#include "boxcanvas.h"
#include <stdio.h>
#include <stdlib.h>
void BoxCanvas_Create(BoxCanvas *canvas, uint8_t X, uint8_t Y, uint8_t W, uint8_t H)
{
uint8_t WidthColumns, HeightRows;
if (W == 0 || H == 0)
Terminal_GetSize(&WidthColumns, &HeightRows);
canvas->Top = Y;
canvas->Left = X;
canvas->Width = (W == 0) ? WidthColumns : W;
canvas->Height = (H == 0) ? HeightRows : H;
canvas->BackgroundStyle = CONSOLE_STYLE_BACKGROUND_GREY;
canvas->FillStyle = CONSOLE_STYLE_TEXT_WHITE;
canvas->BlockBuffer = (uint8_t**)malloc(canvas->Height * sizeof(uint8_t*));
for (size_t row = 0; row < canvas->Height; row++)
{
canvas->BlockBuffer[row] = (uint8_t*)malloc(canvas->Width * sizeof(uint8_t));
memset(canvas->BlockBuffer[row], 0, canvas->Width * sizeof(uint8_t));
}
}
void BoxCanvas_Destroy(BoxCanvas *canvas)
{
for (size_t row = 0; row < canvas->Height; row++)
free((uint8_t *)canvas->BlockBuffer[row]); // free columns memory
free((uint8_t **)canvas->BlockBuffer); // free rows memory
}
void BoxCanvas_GetCharacter(uint8_t boxcode, uint8_t *boxascii, uint32_t* boxunicode)
{
uint8_t boxstrong = boxcode & BOX_FLAG_STRONG;
if (boxcode == 0) // no code ...
{
*boxascii = ' '; // ... no box
*boxunicode = ' ';
}
else if (boxcode & BOX_FLAG_FILL)
{
*boxascii = 219; // full painted box
*boxunicode = 0x2588;
}
else switch (boxcode & BOX_MASK_BORDER)
{
case BOX_FLAG_UP:
case BOX_FLAG_DOWN:
case BOX_FLAG_UP | BOX_FLAG_DOWN: // vertical line |
*boxascii = (boxstrong) ? 186 : 179;
*boxunicode = (boxstrong) ? 0x2551 : 0x2502 ;
break;
case BOX_FLAG_LEFT:
case BOX_FLAG_RIGHT:
case BOX_FLAG_LEFT | BOX_FLAG_RIGHT: // horizontal line -
*boxascii = (boxstrong) ? 205 : 196;
*boxunicode = (boxstrong) ? 0x2550 : 0x2500 ;
break;
case BOX_FLAG_UP | BOX_FLAG_DOWN | BOX_FLAG_LEFT | BOX_FLAG_RIGHT: // cross line +
*boxascii = (boxstrong) ? 206 : 197;
*boxunicode = (boxstrong) ? 0x256C : 0x253C ;
break;
case BOX_FLAG_UP | BOX_FLAG_LEFT: // _|
*boxascii = (boxstrong) ? 188 : 217;
*boxunicode = (boxstrong) ? 0x255D : 0x2518 ;
break;
case BOX_FLAG_UP | BOX_FLAG_RIGHT: // |_
*boxascii = (boxstrong) ? 200 : 192;
*boxunicode = (boxstrong) ? 0x255A : 0x2514 ;
break;
case BOX_FLAG_DOWN | BOX_FLAG_LEFT: // ¨|
*boxascii = (boxstrong) ? 187 : 191;
*boxunicode = (boxstrong) ? 0x2557 : 0x2510 ;
break;
case BOX_FLAG_DOWN | BOX_FLAG_RIGHT: // |¨
*boxascii = (boxstrong) ? 201 : 218;
*boxunicode = (boxstrong) ? 0x2554 : 0x250C ;
break;
case BOX_FLAG_UP | BOX_FLAG_LEFT | BOX_FLAG_RIGHT: // _|_
*boxascii = (boxstrong) ? 202 : 193;
*boxunicode = (boxstrong) ? 0x2569 : 0x2534 ;
break;
case BOX_FLAG_DOWN | BOX_FLAG_LEFT | BOX_FLAG_RIGHT: // ¨|¨
*boxascii = (boxstrong) ? 203 : 194;
*boxunicode = (boxstrong) ? 0x2566 : 0x252C ;
break;
case BOX_FLAG_UP | BOX_FLAG_DOWN | BOX_FLAG_LEFT: // -|
*boxascii = (boxstrong) ? 185 : 180;
*boxunicode = (boxstrong) ? 0x2563 : 0x2524 ;
break;
case BOX_FLAG_UP | BOX_FLAG_DOWN | BOX_FLAG_RIGHT: // |-
*boxascii = (boxstrong) ? 204 : 195;
*boxunicode = (boxstrong) ? 0x2560 : 0x251C ;
break;
default:
if (boxcode & BOX_FLAG_DOTTED)
{
*boxascii = (boxstrong) ? 177 : 176;
*boxunicode = (boxstrong) ? 0x2592 : 0x2591 ;
}
else
{
*boxascii = ' ';
*boxunicode = ' ';
}
break;
}
}
void BoxCanvas_Render(BoxCanvas *canvas)
{
Terminal_SaveCursorPosition(); // let's save the current state before we do anything
Terminal_SetStyle(canvas->FillStyle, canvas->BackgroundStyle); // set the style
Terminal_ClearArea(canvas->Left, canvas->Top, canvas->Width, canvas->Height);
#if (defined(WIN32) || defined(_WIN32) || defined(__WIN32) || defined(__WIN32__))
uint8_t use_utf8 = (GetConsoleOutputCP() == CP_UTF8);
#else
uint8_t use_utf8 = 1; // always use utf-8 under UNIX
#endif
char print_line_buffer[canvas->Width*5];
for (int16_t row = 0; row < canvas->Height; row++) // iterate over the rows and print along the lines (natural printing left to right)
{
memset(print_line_buffer, 0, sizeof(print_line_buffer)); // erase garbage from previous iteration with '\0'
for (int16_t col = 0; col < canvas->Width; col++)
{
uint8_t ascii;
uint32_t unicode;
char utf8[5];
BoxCanvas_GetCharacter(canvas->BlockBuffer[row][col], &ascii, &unicode);
if (use_utf8)
{
utf8_encode(utf8, unicode);
strcat(print_line_buffer, utf8);
}
else
print_line_buffer[strlen(print_line_buffer)] = ascii;
}
Terminal_SetCursorPosition(canvas->Left, canvas->Top + row);
fwrite(print_line_buffer, sizeof(char)*strlen(print_line_buffer), 1, stdout);
//printf("%s", print_line_buffer);
}
Terminal_RestoreCursorSavedPosition();
}
void BoxCanvas_Box(BoxCanvas *canvas, uint8_t X, uint8_t Y, uint8_t W, uint8_t H, BoxDrawStyle style)
{
uint8_t maxX = min(X + W, canvas->Width);
uint8_t maxY = min(Y + H, canvas->Height);
uint8_t shadow = style & BOX_STYLE_SHADOW;
uint8_t fill = style & BOX_STYLE_FILL;
uint8_t strong = style & BOX_STYLE_STRONG;
for (uint8_t currX = X; currX < maxX + (shadow && maxX < canvas->Width) ? 1 : 0; currX++)
{
for (uint8_t currY = Y; currY < maxY + (shadow && maxY < canvas->Height); currY++)
{
uint8_t code = 0;
if (currX == X && currY == Y) // top left corner
code |= BOX_FLAG_DOWN | BOX_FLAG_RIGHT;
else if (currX == maxX-1 && currY == Y) // top right corner
code |= BOX_FLAG_DOWN | BOX_FLAG_LEFT;
else if (currX == X && currY == maxY-1) // bottom left corner
code |= BOX_FLAG_UP | BOX_FLAG_RIGHT;
else if (currX == maxX-1 && currY == maxY-1) // bottom right corner
code |= BOX_FLAG_UP | BOX_FLAG_LEFT;
else if (currX == maxX || currY == maxY) // shadow
{
if ((currX > X + 2) && (currY > Y + 1))
code |= BOX_FLAG_DOTTED;
}
else if (currX == X || currX == maxX-1) // left or right side
code |= BOX_FLAG_UP | BOX_FLAG_DOWN;
else if (currY == Y || currY == maxY-1) // top or bottom
code |= BOX_FLAG_LEFT | BOX_FLAG_RIGHT;
else (void)0; // interior
if (code != 0 && strong) code |= BOX_FLAG_STRONG;
if (fill)
canvas->BlockBuffer[currY][currX] = code;
else
canvas->BlockBuffer[currY][currX] |= code;
}
}
}