visualboyadvance-m/src/components/draw_text/draw_text.cpp

143 lines
16 KiB
C++

/* FCE Ultra - NES/Famicom Emulator
*
* Copyright notice for this file:
* Copyright (C) 2002 Ben Parnell
*
* 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 2 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, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* Code originally from fceu/drawing.h file, adapted by Forgotten
*/
#include "components/draw_text/draw_text.h"
#include "core/base/system.h"
extern int RGB_LOW_BITS_MASK;
static const uint8_t fontdata2[2048] = {
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};
void drawText(uint8_t* screen, int pitch, int x, int y,
const char* string, bool trans)
{
screen += y * pitch;
int inc = 2;
switch (systemColorDepth) {
case 24:
inc = 3;
break;
case 32:
inc = 4;
break;
}
screen += x * inc;
switch (systemColorDepth) {
case 16: {
while (*string) {
char c = *string++;
uint8_t* scr = screen;
uint16_t mask = (uint16_t)(~RGB_LOW_BITS_MASK);
int h, w;
uint16_t* s = (uint16_t*)scr;
for (h = 0; h < 8; h++) {
for (w = 0; w < 8; w++, s++) {
int on = (fontdata2[(c << 3) + h] >> w) & 1;
if (trans) {
if (on)
*s = ((0xf) << systemRedShift) + ((*s & mask) >> 1);
} else {
if (on)
*s = (0x1f) << systemRedShift;
}
}
scr += pitch;
s = (uint16_t*)scr;
}
screen += inc * 8;
}
} break;
case 24: {
while (*string) {
char c = *string++;
uint8_t* scr = screen;
int h, w;
uint8_t* s = (uint8_t*)scr;
for (h = 0; h < 8; h++) {
for (w = 0; w < 8; w++, s += 3) {
int on = (fontdata2[(c << 3) + h] >> w) & 1;
if (trans) {
if (on) {
uint32_t color = (0x1f) << systemRedShift;
*s = ((color & 255) >> 1) + (*s >> 1);
*(s + 1) = (((color >> 8) & 255) >> 1) + (*(s + 1) >> 1);
*(s + 2) = (((color >> 16) & 255) >> 1) + (*(s + 2) >> 1);
}
} else {
if (on) {
uint32_t color = (0x1f) << systemRedShift;
*s = (color & 255);
*(s + 1) = (color >> 8) & 255;
*(s + 2) = (color >> 16) & 255;
}
}
}
scr += pitch;
s = (uint8_t*)scr;
}
screen += inc * 8;
}
} break;
case 32: {
while (*string) {
char c = *string++;
uint8_t* scr = screen;
int h, w;
uint32_t mask = 0xfefefe;
uint32_t* s = (uint32_t*)scr;
for (h = 0; h < 8; h++) {
for (w = 0; w < 8; w++, s++) {
int on = (fontdata2[(c << 3) + h] >> w) & 1;
if (trans) {
if (on)
*s = ((0xf) << systemRedShift) + ((*s & mask) >> 1);
} else {
if (on)
*s = (0x1f) << systemRedShift;
}
}
scr += pitch;
s = (uint32_t*)scr;
}
screen += inc * 8;
}
} break;
}
}