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|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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.
*
*/
#include "common/stream.h"
#include "common/rect.h"
#include "common/system.h"
#include "common/str.h"
#include "common/config-manager.h"
#include "graphics/surface.h"
#include "graphics/palette.h"
#include "graphics/thumbnail.h"
#include "engines/util.h"
#include "adl/display.h"
#include "adl/adl.h"
namespace Adl {
// This implements the Apple II "Hi-Res" display mode
#define TEXT_BUF_SIZE (TEXT_WIDTH * TEXT_HEIGHT)
#define COLOR_PALETTE_ENTRIES 8
static const byte colorPalette[COLOR_PALETTE_ENTRIES * 3] = {
0x00, 0x00, 0x00,
0xff, 0xff, 0xff,
0xc7, 0x34, 0xff,
0x38, 0xcb, 0x00,
0x00, 0x00, 0x00,
0xff, 0xff, 0xff,
0x0d, 0xa1, 0xff,
0xf2, 0x5e, 0x00
};
// Opacity of the optional scanlines (percentage)
#define SCANLINE_OPACITY 75
// Corresponding color in second palette
#define PAL2(X) ((X) | 0x04)
// Alternate color for odd pixel rows (for scanlines)
#define ALTCOL(X) ((X) | 0x08)
// Green monochrome palette
#define MONO_PALETTE_ENTRIES 2
static const byte monoPalette[MONO_PALETTE_ENTRIES * 3] = {
0x00, 0x00, 0x00,
0x00, 0xc0, 0x01
};
// Uppercase-only Apple II font (manually created).
static const byte font[64][5] = {
{ 0x7c, 0x82, 0xba, 0xb2, 0x9c }, { 0xf8, 0x24, 0x22, 0x24, 0xf8 }, // @A
{ 0xfe, 0x92, 0x92, 0x92, 0x6c }, { 0x7c, 0x82, 0x82, 0x82, 0x44 }, // BC
{ 0xfe, 0x82, 0x82, 0x82, 0x7c }, { 0xfe, 0x92, 0x92, 0x92, 0x82 }, // DE
{ 0xfe, 0x12, 0x12, 0x12, 0x02 }, { 0x7c, 0x82, 0x82, 0xa2, 0xe2 }, // FG
{ 0xfe, 0x10, 0x10, 0x10, 0xfe }, { 0x00, 0x82, 0xfe, 0x82, 0x00 }, // HI
{ 0x40, 0x80, 0x80, 0x80, 0x7e }, { 0xfe, 0x10, 0x28, 0x44, 0x82 }, // JK
{ 0xfe, 0x80, 0x80, 0x80, 0x80 }, { 0xfe, 0x04, 0x18, 0x04, 0xfe }, // LM
{ 0xfe, 0x08, 0x10, 0x20, 0xfe }, { 0x7c, 0x82, 0x82, 0x82, 0x7c }, // NO
{ 0xfe, 0x12, 0x12, 0x12, 0x0c }, { 0x7c, 0x82, 0xa2, 0x42, 0xbc }, // PQ
{ 0xfe, 0x12, 0x32, 0x52, 0x8c }, { 0x4c, 0x92, 0x92, 0x92, 0x64 }, // RS
{ 0x02, 0x02, 0xfe, 0x02, 0x02 }, { 0x7e, 0x80, 0x80, 0x80, 0x7e }, // TU
{ 0x3e, 0x40, 0x80, 0x40, 0x3e }, { 0xfe, 0x40, 0x30, 0x40, 0xfe }, // VW
{ 0xc6, 0x28, 0x10, 0x28, 0xc6 }, { 0x06, 0x08, 0xf0, 0x08, 0x06 }, // XY
{ 0xc2, 0xa2, 0x92, 0x8a, 0x86 }, { 0xfe, 0xfe, 0x82, 0x82, 0x82 }, // Z[
{ 0x04, 0x08, 0x10, 0x20, 0x40 }, { 0x82, 0x82, 0x82, 0xfe, 0xfe }, // \]
{ 0x20, 0x10, 0x08, 0x10, 0x20 }, { 0x80, 0x80, 0x80, 0x80, 0x80 }, // ^_
{ 0x00, 0x00, 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0xbe, 0x00, 0x00 }, // !
{ 0x00, 0x0e, 0x00, 0x0e, 0x00 }, { 0x28, 0xfe, 0x28, 0xfe, 0x28 }, // "#
{ 0x48, 0x54, 0xfe, 0x54, 0x24 }, { 0x46, 0x26, 0x10, 0xc8, 0xc4 }, // $%
{ 0x6c, 0x92, 0xac, 0x40, 0xa0 }, { 0x00, 0x00, 0x0e, 0x00, 0x00 }, // &'
{ 0x38, 0x44, 0x82, 0x00, 0x00 }, { 0x00, 0x00, 0x82, 0x44, 0x38 }, // ()
{ 0x44, 0x28, 0xfe, 0x28, 0x44 }, { 0x10, 0x10, 0x7c, 0x10, 0x10 }, // *+
{ 0x00, 0x80, 0x60, 0x00, 0x00 }, { 0x10, 0x10, 0x10, 0x10, 0x10 }, // ,-
{ 0x00, 0x00, 0x80, 0x00, 0x00 }, { 0x40, 0x20, 0x10, 0x08, 0x04 }, // ./
{ 0x7c, 0xa2, 0x92, 0x8a, 0x7c }, { 0x00, 0x84, 0xfe, 0x80, 0x00 }, // 01
{ 0xc4, 0xa2, 0x92, 0x92, 0x8c }, { 0x42, 0x82, 0x92, 0x9a, 0x66 }, // 23
{ 0x30, 0x28, 0x24, 0xfe, 0x20 }, { 0x4e, 0x8a, 0x8a, 0x8a, 0x72 }, // 45
{ 0x78, 0x94, 0x92, 0x92, 0x62 }, { 0x02, 0xe2, 0x12, 0x0a, 0x06 }, // 67
{ 0x6c, 0x92, 0x92, 0x92, 0x6c }, { 0x8c, 0x92, 0x92, 0x52, 0x3c }, // 89
{ 0x00, 0x00, 0x28, 0x00, 0x00 }, { 0x00, 0x80, 0x68, 0x00, 0x00 }, // :;
{ 0x10, 0x28, 0x44, 0x82, 0x00 }, { 0x28, 0x28, 0x28, 0x28, 0x28 }, // <=
{ 0x00, 0x82, 0x44, 0x28, 0x10 }, { 0x04, 0x02, 0xb2, 0x0a, 0x04 } // >?
};
Display::Display() :
_mode(DISPLAY_MODE_TEXT),
_cursorPos(0),
_showCursor(false) {
_monochrome = !ConfMan.getBool("color");
_scanlines = ConfMan.getBool("scanlines");
if (_monochrome)
g_system->getPaletteManager()->setPalette(monoPalette, 0, MONO_PALETTE_ENTRIES);
else
g_system->getPaletteManager()->setPalette(colorPalette, 0, COLOR_PALETTE_ENTRIES);
showScanlines(_scanlines);
_frameBuf = new byte[DISPLAY_SIZE];
memset(_frameBuf, 0, DISPLAY_SIZE);
_frameBufSurface = new Graphics::Surface;
// We need 2x scaling to properly render the half-pixel shift
// of the second palette
_frameBufSurface->create(DISPLAY_WIDTH * 2, DISPLAY_HEIGHT * 2, Graphics::PixelFormat::createFormatCLUT8());
_textBuf = new byte[TEXT_BUF_SIZE];
memset(_textBuf, (byte)APPLECHAR(' '), TEXT_BUF_SIZE);
_textBufSurface = new Graphics::Surface;
// For ease of copying, also use 2x scaling here
_textBufSurface->create(DISPLAY_WIDTH * 2, DISPLAY_HEIGHT * 2, Graphics::PixelFormat::createFormatCLUT8());
createFont();
_startMillis = g_system->getMillis();
}
Display::~Display() {
delete[] _frameBuf;
_frameBufSurface->free();
delete _frameBufSurface;
delete[] _textBuf;
_textBufSurface->free();
delete _textBufSurface;
_font->free();
delete _font;
}
void Display::setMode(DisplayMode mode) {
_mode = mode;
if (_mode == DISPLAY_MODE_TEXT || _mode == DISPLAY_MODE_MIXED)
updateTextScreen();
if (_mode == DISPLAY_MODE_HIRES || _mode == DISPLAY_MODE_MIXED)
updateHiResScreen();
}
void Display::updateTextScreen() {
updateTextSurface();
if (_mode == DISPLAY_MODE_TEXT)
g_system->copyRectToScreen(_textBufSurface->getPixels(), _textBufSurface->pitch, 0, 0, _textBufSurface->w, _textBufSurface->h);
else if (_mode == DISPLAY_MODE_MIXED)
g_system->copyRectToScreen(_textBufSurface->getBasePtr(0, _textBufSurface->h - 4 * 8 * 2), _textBufSurface->pitch, 0, _textBufSurface->h - 4 * 8 * 2, _textBufSurface->w, 4 * 8 * 2);
g_system->updateScreen();
}
void Display::updateHiResScreen() {
updateHiResSurface();
if (_mode == DISPLAY_MODE_HIRES)
g_system->copyRectToScreen(_frameBufSurface->getPixels(), _frameBufSurface->pitch, 0, 0, _frameBufSurface->w, _frameBufSurface->h);
else if (_mode == DISPLAY_MODE_MIXED)
g_system->copyRectToScreen(_frameBufSurface->getPixels(), _frameBufSurface->pitch, 0, 0, _frameBufSurface->w, _frameBufSurface->h - 4 * 8 * 2);
g_system->updateScreen();
}
bool Display::saveThumbnail(Common::WriteStream &out) {
if (_scanlines) {
showScanlines(false);
g_system->updateScreen();
}
bool retval = Graphics::saveThumbnail(out);
if (_scanlines) {
showScanlines(true);
g_system->updateScreen();
}
return retval;
}
void Display::loadFrameBuffer(Common::ReadStream &stream, byte *dst) {
for (uint j = 0; j < 8; ++j) {
for (uint i = 0; i < 8; ++i) {
stream.read(dst, DISPLAY_PITCH);
dst += DISPLAY_PITCH * 64;
stream.read(dst, DISPLAY_PITCH);
dst += DISPLAY_PITCH * 64;
stream.read(dst, DISPLAY_PITCH);
stream.readUint32LE();
stream.readUint32LE();
dst -= DISPLAY_PITCH * 120;
}
dst -= DISPLAY_PITCH * 63;
}
if (stream.eos() || stream.err())
error("Failed to read frame buffer");
}
void Display::loadFrameBuffer(Common::ReadStream &stream) {
loadFrameBuffer(stream, _frameBuf);
}
void Display::putPixel(const Common::Point &p, byte color) {
byte offset = p.x / 7;
byte mask = 0x80 | (1 << (p.x % 7));
// Since white and black are in both palettes, we leave
// the palette bit alone
if ((color & 0x7f) == 0x7f || (color & 0x7f) == 0)
mask &= 0x7f;
// Adjust colors starting with bits '01' or '10' for
// odd offsets
if (offset & 1) {
byte c = color << 1;
if (c >= 0x40 && c < 0xc0)
color ^= 0x7f;
}
writeFrameBuffer(p, color, mask);
}
void Display::setPixelBit(const Common::Point &p, byte color) {
writeFrameBuffer(p, color, 1 << (p.x % 7));
}
void Display::setPixelPalette(const Common::Point &p, byte color) {
writeFrameBuffer(p, color, 0x80);
}
bool Display::getPixelBit(const Common::Point &p) const {
assert(p.x >= 0 && p.x < DISPLAY_WIDTH && p.y >= 0 && p.y < DISPLAY_HEIGHT);
byte *b = _frameBuf + p.y * DISPLAY_PITCH + p.x / 7;
return *b & (1 << (p.x % 7));
}
void Display::clear(byte color) {
byte val = 0;
byte c = color << 1;
if (c >= 0x40 && c < 0xc0)
val = 0x7f;
for (uint i = 0; i < DISPLAY_SIZE; ++i) {
_frameBuf[i] = color;
color ^= val;
}
}
void Display::home() {
memset(_textBuf, (byte)APPLECHAR(' '), TEXT_BUF_SIZE);
_cursorPos = 0;
}
void Display::moveCursorForward() {
++_cursorPos;
if (_cursorPos >= TEXT_BUF_SIZE)
scrollUp();
}
void Display::moveCursorBackward() {
if (_cursorPos > 0)
--_cursorPos;
}
void Display::moveCursorTo(const Common::Point &pos) {
_cursorPos = pos.y * TEXT_WIDTH + pos.x;
if (_cursorPos >= TEXT_BUF_SIZE)
error("Cursor position (%i, %i) out of bounds", pos.x, pos.y);
}
// FIXME: This does not currently update the surfaces
void Display::printChar(char c) {
if (c == APPLECHAR('\r'))
_cursorPos = (_cursorPos / TEXT_WIDTH + 1) * TEXT_WIDTH;
else if (c == APPLECHAR('\a')) {
updateTextScreen();
static_cast<AdlEngine *>(g_engine)->bell();
} else if ((byte)c < 0x80 || (byte)c >= 0xa0) {
setCharAtCursor(c);
++_cursorPos;
}
if (_cursorPos == TEXT_BUF_SIZE)
scrollUp();
}
void Display::printString(const Common::String &str) {
Common::String::const_iterator c;
for (c = str.begin(); c != str.end(); ++c)
printChar(*c);
updateTextScreen();
}
void Display::printAsciiString(const Common::String &str) {
Common::String aStr;
Common::String::const_iterator it;
for (it = str.begin(); it != str.end(); ++it)
aStr += APPLECHAR(*it);
printString(aStr);
}
void Display::setCharAtCursor(byte c) {
_textBuf[_cursorPos] = c;
}
void Display::showCursor(bool enable) {
_showCursor = enable;
}
void Display::writeFrameBuffer(const Common::Point &p, byte color, byte mask) {
assert(p.x >= 0 && p.x < DISPLAY_WIDTH && p.y >= 0 && p.y < DISPLAY_HEIGHT);
byte *b = _frameBuf + p.y * DISPLAY_PITCH + p.x / 7;
color ^= *b;
color &= mask;
*b ^= color;
}
void Display::showScanlines(bool enable) {
byte pal[COLOR_PALETTE_ENTRIES * 3];
g_system->getPaletteManager()->grabPalette(pal, 0, COLOR_PALETTE_ENTRIES);
if (enable) {
for (uint i = 0; i < ARRAYSIZE(pal); ++i)
pal[i] = pal[i] * (100 - SCANLINE_OPACITY) / 100;
}
g_system->getPaletteManager()->setPalette(pal, COLOR_PALETTE_ENTRIES, COLOR_PALETTE_ENTRIES);
}
static byte processColorBits(uint16 &bits, bool &odd, bool secondPal) {
byte color = 0;
switch (bits & 0x7) {
case 0x3: // 011 (white)
case 0x6: // 110
case 0x7: // 111
color = 1;
break;
case 0x2: // 010 (color)
color = 2 + odd;
break;
case 0x5: // 101 (color)
color = 2 + !odd;
}
if (secondPal)
color = PAL2(color);
odd = !odd;
bits >>= 1;
return color;
}
static void renderPixelRowColor(byte *dst, byte *src) {
uint16 bits = (src[0] & 0x7f) << 1;
byte pal = src[0] >> 7;
if (pal != 0)
*dst++ = 0;
bool odd = false;
for (uint i = 0; i < DISPLAY_PITCH; ++i) {
if (i != DISPLAY_PITCH - 1) {
bits |= (src[i + 1] & 0x7f) << 8;
pal |= (src[i + 1] >> 7) << 1;
}
// For the first 6 bits in the block we draw two pixels
for (uint j = 0; j < 6; ++j) {
byte color = processColorBits(bits, odd, pal & 1);
*dst++ = color;
*dst++ = color;
}
// Last bit of the block, draw one, two or three pixels
byte color = processColorBits(bits, odd, pal & 1);
// Draw the first pixel
*dst++ = color;
switch (pal) {
case 0x0:
case 0x3:
// If palette stays the same, draw a second pixel
*dst++ = color;
break;
case 0x2:
// If we're moving from first to second palette,
// draw a second pixel, and a third in the second
// palette.
*dst++ = color;
*dst++ = PAL2(color);
}
pal >>= 1;
}
}
static void renderPixelRowMono(byte *dst, byte *src) {
byte pal = src[0] >> 7;
if (pal != 0)
*dst++ = 0;
for (uint i = 0; i < DISPLAY_PITCH; ++i) {
if (i != DISPLAY_PITCH - 1)
pal |= (src[i + 1] >> 7) << 1;
for (uint j = 0; j < 6; ++j) {
bool color = src[i] & (1 << j);
*dst++ = color;
*dst++ = color;
}
bool color = src[i] & (1 << 6);
*dst++ = color;
switch (pal) {
case 0x0:
case 0x3:
*dst++ = color;
break;
case 0x2:
*dst++ = color;
*dst++ = color;
}
pal >>= 1;
}
}
static void copyEvenSurfaceRows(Graphics::Surface &surf) {
byte *src = (byte *)surf.getPixels();
for (uint y = 0; y < surf.h / 2; ++y) {
byte *dst = src + surf.pitch;
for (uint x = 0; x < surf.w; ++x)
dst[x] = ALTCOL(src[x]);
src += surf.pitch * 2;
}
}
void Display::updateHiResSurface() {
byte *src = _frameBuf;
byte *dst = (byte *)_frameBufSurface->getPixels();
for (uint i = 0; i < DISPLAY_HEIGHT; ++i) {
if (_monochrome)
renderPixelRowMono(dst, src);
else
renderPixelRowColor(dst, src);
src += DISPLAY_PITCH;
dst += _frameBufSurface->pitch * 2;
}
copyEvenSurfaceRows(*_frameBufSurface);
}
void Display::updateTextSurface() {
for (uint row = 0; row < 24; ++row)
for (uint col = 0; col < TEXT_WIDTH; ++col) {
uint charPos = row * TEXT_WIDTH + col;
char c = _textBuf[row * TEXT_WIDTH + col];
if (charPos == _cursorPos && _showCursor)
c = (c & 0x3f) | 0x40;
Common::Rect r(7 * 2, 8 * 2);
r.translate(((c & 0x3f) % 16) * 7 * 2, (c & 0x3f) / 16 * 8 * 2);
if (!(c & 0x80)) {
// Blink text. We subtract _startMillis to make this compatible
// with the event recorder, which returns offsetted values on
// playback.
const uint32 millisPassed = g_system->getMillis() - _startMillis;
if (!(c & 0x40) || ((millisPassed / 270) & 1))
r.translate(0, 4 * 8 * 2);
}
_textBufSurface->copyRectToSurface(*_font, col * 7 * 2, row * 8 * 2, r);
}
}
void Display::drawChar(byte c, int x, int y) {
byte *buf = (byte *)_font->getPixels() + y * _font->pitch + x;
for (uint row = 0; row < 8; ++row) {
for (uint col = 1; col < 6; ++col) {
if (font[c][col - 1] & (1 << row)) {
buf[col * 2] = 1;
buf[col * 2 + 1] = 1;
}
}
buf += 2 * _font->pitch;
}
}
void Display::createFont() {
_font = new Graphics::Surface;
_font->create(16 * 7 * 2, 4 * 8 * 2 * 2, Graphics::PixelFormat::createFormatCLUT8());
for (uint i = 0; i < 4; ++i)
for (uint j = 0; j < 16; ++j)
drawChar(i * 16 + j, j * 7 * 2, i * 8 * 2);
// Create inverted font
byte *buf = (byte *)_font->getPixels();
byte *bufInv = buf + (_font->h / 2) * _font->pitch;
for (uint row = 0; row < _font->h / 2; row += 2) {
for (uint col = 0; col < _font->w; ++col)
bufInv[col] = (buf[col] ? 0 : 1);
buf += _font->pitch * 2;
bufInv += _font->pitch * 2;
}
copyEvenSurfaceRows(*_font);
}
void Display::scrollUp() {
memmove(_textBuf, _textBuf + TEXT_WIDTH, TEXT_BUF_SIZE - TEXT_WIDTH);
memset(_textBuf + TEXT_BUF_SIZE - TEXT_WIDTH, (byte)APPLECHAR(' '), TEXT_WIDTH);
if (_cursorPos >= TEXT_WIDTH)
_cursorPos -= TEXT_WIDTH;
}
} // End of namespace Adl
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