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engines/sci/graphics/drivers/cgabw.cpp
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222
engines/sci/graphics/drivers/cgabw.cpp
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/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "common/file.h"
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#include "common/system.h"
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#include "graphics/cursorman.h"
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#include "sci/graphics/drivers/gfxdriver_intern.h"
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namespace Sci {
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class SCI0_CGABWDriver final : public SCI0_DOSPreVGADriver {
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public:
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SCI0_CGABWDriver(uint32 monochromeColor, bool rgbRendering);
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~SCI0_CGABWDriver() override;
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void copyRectToScreen(const byte *src, int srcX, int srcY, int pitch, int destX, int destY, int w, int h, const PaletteMod*, const byte*) override;
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void replaceCursor(const void *cursor, uint w, uint h, int hotspotX, int hotspotY, uint32 keycolor) override;
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Common::Point getMousePos() const override;
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void setMousePos(const Common::Point &pos) const override;
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void setShakePos(int shakeXOffset, int shakeYOffset) const override;
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void clearRect(const Common::Rect &r) const override;
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Common::Point getRealCoords(Common::Point &pos) const override;
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static bool validateMode(Common::Platform p) { return (p == Common::kPlatformDOS) && checkDriver(_driverFiles, 2); }
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private:
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void setupRenderProc() override;
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byte _monochromePalette[6];
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const byte *_monochromePatterns;
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bool _earlyVersion;
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typedef void (*LineProc)(byte*&, const byte*, int, int, int, const byte*, const byte*);
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LineProc _renderLine;
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static const char *_driverFiles[2];
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};
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SCI0_CGABWDriver::SCI0_CGABWDriver(uint32 monochromeColor, bool rgbRendering) : SCI0_DOSPreVGADriver(2, 640, 400, rgbRendering), _monochromePatterns(nullptr), _earlyVersion(false), _renderLine(nullptr) {
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_monochromePalette[0] = _monochromePalette[1] = _monochromePalette[2] = 0;
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_monochromePalette[3] = (monochromeColor >> 16) & 0xff;
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_monochromePalette[4] = (monochromeColor >> 8) & 0xff;
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_monochromePalette[5] = monochromeColor & 0xff;
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assignPalette(_monochromePalette);
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if (!(_monochromePatterns = SciGfxDrvInternal::monochrInit(_driverFiles[0], _earlyVersion)) && !(_monochromePatterns = SciGfxDrvInternal::monochrInit(_driverFiles[1], _earlyVersion)))
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error("Failed to open '%s' or '%s'", _driverFiles[0], _driverFiles[1]);
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}
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SCI0_CGABWDriver::~SCI0_CGABWDriver() {
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delete[] _monochromePatterns;
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}
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void SCI0_CGABWDriver::copyRectToScreen(const byte *src, int srcX, int srcY, int pitch, int destX, int destY, int w, int h, const PaletteMod*, const byte*) {
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GFXDRV_ASSERT_READY;
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byte *dst = _compositeBuffer;
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int ty = destY & 7;
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if (_earlyVersion) {
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++ty;
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byte diff = srcX & 1;
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srcX &= ~1;
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destX &= ~1;
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w = (w + diff + 1) & ~1;
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}
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src += (srcY * pitch + srcX);
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for (int i = 0; i < h; ++i) {
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_renderLine(dst, src, w, srcX & 3, ty, _monochromePatterns, _internalPalette);
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ty = (ty + 1) & 7;
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src += pitch;
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}
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g_system->copyRectToScreen(_compositeBuffer, (w << 1) * _pixelSize, destX << 1, destY << 1, w << 1, h << 1);
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}
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void SCI0_CGABWDriver::replaceCursor(const void *cursor, uint w, uint h, int hotspotX, int hotspotY, uint32 keycolor) {
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GFXDRV_ASSERT_READY;
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// Instead of implementing the original cursor rendering code, we rely on the 8 bit cursor that
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// has already been generated by the engine. We simply convert the colors as needed and scale the cursor...
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assert(keycolor == 1);
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keycolor = 0x0f;
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w <<= 1;
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const byte *s = reinterpret_cast<const byte*>(cursor);
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byte *d0 = _compositeBuffer;
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byte *d1 = _compositeBuffer + w;
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for (uint i = 0; i < h; ++i) {
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for (uint ii = 0; ii < w; ++ii) {
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*d0++ = *d1++ = *s ? (*s ^ 0x0e) : 0;
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if (ii & 1)
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++s;
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}
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d0 += w;
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d1 += w;
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}
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CursorMan.replaceCursor(_compositeBuffer, w, h << 1, hotspotX << 1, hotspotY << 1, keycolor);
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}
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Common::Point SCI0_CGABWDriver::getMousePos() const {
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Common::Point res = GfxDriver::getMousePos();
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res.x >>= 1;
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res.y >>= 1;
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return res;
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}
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void SCI0_CGABWDriver::setMousePos(const Common::Point &pos) const {
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g_system->warpMouse(pos.x << 1, pos.y << 1);
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}
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void SCI0_CGABWDriver::setShakePos(int shakeXOffset, int shakeYOffset) const {
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g_system->setShakePos(shakeXOffset << 1, shakeYOffset << 1);
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}
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void SCI0_CGABWDriver::clearRect(const Common::Rect &r) const {
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Common::Rect r2(r.left << 1, r.top << 1, r.right << 1, r.bottom << 1);
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GfxDriver::clearRect(r2);
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}
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Common::Point SCI0_CGABWDriver::getRealCoords(Common::Point &pos) const {
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return Common::Point(pos.x << 1, pos.y << 1);
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}
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template <typename T> void cgabwRenderLine_v1(byte *&dst, const byte *src, int w, int tx, int ty, const byte *patterns, const byte *pal) {
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const T *p = reinterpret_cast<const T*>(pal);
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const uint16 *patterns16 = reinterpret_cast<const uint16*>(patterns);
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T *d1 = reinterpret_cast<T*>(dst);
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T *d2 = d1 + (w << 1);
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w >>= 1;
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for (int i = 0; i < w; ++i) {
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uint16 pt = patterns16[((src[0] & 0x0f) << 4) | (src[1] & 0x0f)];
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src += 2;
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byte sh = (ty & 3) << 1;
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byte lo = ((pt & 0xff) >> sh) | ((pt & 0xff) << (8 - sh));
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byte hi = (pt >> (8 + sh)) | ((pt >> 8) << (8 - sh));
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if (sizeof(T) == 1) {
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*d1++ = *d2++ = ((lo >> (6 - (tx << 1))) >> 1) & 1;
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*d1++ = *d2++ = (lo >> (6 - (tx << 1))) & 1;
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*d1++ = *d2++ = ((hi >> (4 - (tx << 1))) >> 1) & 1;
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*d1++ = *d2++ = (hi >> (4 - (tx << 1))) & 1;
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} else {
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*d1++ = *d2++ = p[((lo >> (6 - (tx << 1))) >> 1) & 1];
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*d1++ = *d2++ = p[(lo >> (6 - (tx << 1))) & 1];
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*d1++ = *d2++ = p[((hi >> (4 - (tx << 1))) >> 1) & 1];
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*d1++ = *d2++ = p[(hi >> (4 - (tx << 1))) & 1];
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}
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tx ^= 2;
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}
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dst = reinterpret_cast<byte*>(d2);
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}
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template <typename T> void cgabwRenderLine_v2(byte *&dst, const byte *src, int w, int tx, int ty, const byte *patterns, const byte *pal) {
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const T *p = reinterpret_cast<const T*>(pal);
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T *d1 = reinterpret_cast<T*>(dst);
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T *d2 = d1 + (w << 1);
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for (int i = 0; i < w; ++i) {
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byte pt = patterns[((*src++ & 0x0f) << 3) + ty] >> (6 - (tx << 1));
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if (sizeof(T) == 1) {
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*d1++ = *d2++ = (pt >> 1) & 1;
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*d1++ = *d2++ = pt & 1;
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} else {
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*d1++ = *d2++ = p[(pt >> 1) & 1];
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*d1++ = *d2++ = p[pt & 1];
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}
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tx = (tx + 1) & 3;
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}
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dst = reinterpret_cast<byte*>(d2);
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}
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void SCI0_CGABWDriver::setupRenderProc() {
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static const LineProc lineProcs[] = {
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&cgabwRenderLine_v1<byte>,
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&cgabwRenderLine_v1<uint16>,
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&cgabwRenderLine_v1<uint32>,
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&cgabwRenderLine_v2<byte>,
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&cgabwRenderLine_v2<uint16>,
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&cgabwRenderLine_v2<uint32>
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};
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int t = _pixelSize >> 1;
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if (!_earlyVersion)
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t += 3;
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assert(t < ARRAYSIZE(lineProcs));
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_renderLine = lineProcs[t];
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}
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const char *SCI0_CGABWDriver::_driverFiles[2] = { "CGA320BW.DRV", "CGA320M.DRV" };
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SCI_GFXDRV_VALIDATE_IMPL(SCI0_CGABW)
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GfxDriver *SCI0_CGABWDriver_create(int rgbRendering, ...) {
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static const uint32 monochromeColors[] = { 0xffbf66, 0x66ff66, 0xffffff };
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va_list args;
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va_start(args, rgbRendering);
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int config = CLIP<int>(va_arg(args, int), 0, ARRAYSIZE(monochromeColors) - 1);
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va_end(args);
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return new SCI0_CGABWDriver(monochromeColors[config], rgbRendering != 0);
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}
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} // End of namespace Sci
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