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Diffstat (limited to 'engines/adl/display_a2.cpp')
| -rw-r--r-- | engines/adl/display_a2.cpp | 477 |
1 files changed, 477 insertions, 0 deletions
diff --git a/engines/adl/display_a2.cpp b/engines/adl/display_a2.cpp new file mode 100644 index 0000000000..393e38bab1 --- /dev/null +++ b/engines/adl/display_a2.cpp @@ -0,0 +1,477 @@ +/* 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_a2.h" +#include "adl/adl.h" + +namespace Adl { + +#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_A2::Display_A2() : _showCursor(false) { + initGraphics(Display_A2::kGfxWidth * 2, Display_A2::kGfxHeight * 2); +} + +Display_A2::~Display_A2() { + delete[] _frameBuf; + + if (_font) { + _font->free(); + delete _font; + } +} + +void Display_A2::init() { + _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); + + // We need 2x scaling to properly render the half-pixel shift + // of the second palette + createSurfaces(Display_A2::kGfxWidth * 2, Display_A2::kGfxHeight * 2, 64); + createTextBuffer(Display_A2::kTextWidth, Display_A2::kTextHeight); + + _frameBuf = new byte[Display_A2::kGfxSize]; + memset(_frameBuf, 0, Display_A2::kGfxSize); + + createFont(); + + _startMillis = g_system->getMillis(); +} + +bool Display_A2::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_A2::loadFrameBuffer(Common::ReadStream &stream, byte *dst) { + for (uint j = 0; j < 8; ++j) { + for (uint i = 0; i < 8; ++i) { + stream.read(dst, Display_A2::kGfxPitch); + dst += Display_A2::kGfxPitch * 64; + stream.read(dst, Display_A2::kGfxPitch); + dst += Display_A2::kGfxPitch * 64; + stream.read(dst, Display_A2::kGfxPitch); + stream.readUint32LE(); + stream.readUint32LE(); + dst -= Display_A2::kGfxPitch * 120; + } + dst -= Display_A2::kGfxPitch * 63; + } + + if (stream.eos() || stream.err()) + error("Failed to read frame buffer"); +} + +void Display_A2::loadFrameBuffer(Common::ReadStream &stream) { + loadFrameBuffer(stream, _frameBuf); +} + +void Display_A2::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_A2::setPixelByte(const Common::Point &p, byte color) { + assert(p.x >= 0 && p.x < Display_A2::kGfxWidth && p.y >= 0 && p.y < Display_A2::kGfxHeight); + + _frameBuf[p.y * Display_A2::kGfxPitch + p.x / 7] = color; +} + +void Display_A2::setPixelBit(const Common::Point &p, byte color) { + writeFrameBuffer(p, color, 1 << (p.x % 7)); +} + +void Display_A2::setPixelPalette(const Common::Point &p, byte color) { + writeFrameBuffer(p, color, 0x80); +} + +byte Display_A2::getPixelByte(const Common::Point &p) const { + assert(p.x >= 0 && p.x < Display_A2::kGfxWidth && p.y >= 0 && p.y < Display_A2::kGfxHeight); + + return _frameBuf[p.y * Display_A2::kGfxPitch + p.x / 7]; +} + +bool Display_A2::getPixelBit(const Common::Point &p) const { + assert(p.x >= 0 && p.x < Display_A2::kGfxWidth && p.y >= 0 && p.y < Display_A2::kGfxHeight); + + byte *b = _frameBuf + p.y * Display_A2::kGfxPitch + p.x / 7; + return *b & (1 << (p.x % 7)); +} + +void Display_A2::clear(byte color) { + byte val = 0; + + byte c = color << 1; + if (c >= 0x40 && c < 0xc0) + val = 0x7f; + + for (uint i = 0; i < Display_A2::kGfxSize; ++i) { + _frameBuf[i] = color; + color ^= val; + } +} + +// FIXME: This does not currently update the surfaces +void Display_A2::printChar(char c) { + if (c == APPLECHAR('\r')) + _cursorPos = (_cursorPos / Display_A2::kTextWidth + 1) * Display_A2::kTextWidth; + else if (c == APPLECHAR('\a')) { + copyTextSurface(); + static_cast<AdlEngine *>(g_engine)->bell(); + } else if ((byte)c < 0x80 || (byte)c >= 0xa0) { + setCharAtCursor(c); + ++_cursorPos; + } + + if (_cursorPos == Display_A2::kTextWidth * Display_A2::kTextHeight) + scrollUp(); +} + +void Display_A2::showCursor(bool enable) { + _showCursor = enable; +} + +void Display_A2::writeFrameBuffer(const Common::Point &p, byte color, byte mask) { + assert(p.x >= 0 && p.x < Display_A2::kGfxWidth && p.y >= 0 && p.y < Display_A2::kGfxHeight); + + byte *b = _frameBuf + p.y * Display_A2::kGfxPitch + p.x / 7; + color ^= *b; + color &= mask; + *b ^= color; +} + +void Display_A2::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_A2::kGfxPitch; ++i) { + if (i != Display_A2::kGfxPitch - 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_A2::kGfxPitch; ++i) { + if (i != Display_A2::kGfxPitch - 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_A2::updateGfxSurface() { + byte *src = _frameBuf; + byte *dst = (byte *)_gfxSurface->getPixels(); + + for (uint i = 0; i < Display_A2::kGfxHeight; ++i) { + if (_monochrome) + renderPixelRowMono(dst, src); + else + renderPixelRowColor(dst, src); + src += Display_A2::kGfxPitch; + dst += _gfxSurface->pitch * 2; + } + + copyEvenSurfaceRows(*_gfxSurface); +} + +void Display_A2::updateTextSurface() { + for (uint row = 0; row < 24; ++row) + for (uint col = 0; col < Display_A2::kTextWidth; ++col) { + uint charPos = row * Display_A2::kTextWidth + col; + char c = _textBuf[row * Display_A2::kTextWidth + 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); + } + + _textSurface->copyRectToSurface(*_font, col * 7 * 2, row * 8 * 2, r); + } +} + +void Display_A2::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_A2::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); +} + +} // End of namespace Adl |