Merge pull request #16 "Add a PixelFormat to Graphics::Surface.".

For further discussion check here:
https://github.com/scummvm/scummvm/pull/16

Conflicts:
	graphics/png.cpp

6 files changed, 60 insertions, 57 deletions

diff --git a/engines/scumm/charset.cpp b/engines/scumm/charset.cpp
index 861e448221..0246a255f9 100644
--- a/engines/scumm/charset.cpp
+++ b/engines/scumm/charset.cpp
@@ -777,7 +777,7 @@ void CharsetRendererV3::printChar(int chr, bool ignoreCharsetMask) {
 		(ignoreCharsetMask || !vs->hasTwoBuffers)) {
 		dst = vs->getPixels(_left, drawTop);
 		if (charPtr)
-			drawBits1(*vs, dst, charPtr, drawTop, origWidth, origHeight, vs->bytesPerPixel);
+			drawBits1(*vs, dst, charPtr, drawTop, origWidth, origHeight, vs->format.bytesPerPixel);
 #ifndef DISABLE_TOWNS_DUAL_LAYER_MODE
 		else if (_vm->_cjkFont)
 			_vm->_cjkFont->drawChar(vs, chr, _left, drawTop, _color, _shadowColor);
@@ -785,7 +785,7 @@ void CharsetRendererV3::printChar(int chr, bool ignoreCharsetMask) {
 	} else {
 		dst = (byte *)_vm->_textSurface.getBasePtr(_left * _vm->_textSurfaceMultiplier, _top * _vm->_textSurfaceMultiplier);
 		if (charPtr)
-			drawBits1(_vm->_textSurface, dst, charPtr, drawTop, origWidth, origHeight, _vm->_textSurface.bytesPerPixel, (_vm->_textSurfaceMultiplier == 2 && !is2byte));
+			drawBits1(_vm->_textSurface, dst, charPtr, drawTop, origWidth, origHeight, _vm->_textSurface.format.bytesPerPixel, (_vm->_textSurfaceMultiplier == 2 && !is2byte));
 #ifndef DISABLE_TOWNS_DUAL_LAYER_MODE
 		else if (_vm->_cjkFont)
 			_vm->_cjkFont->drawChar(_vm->_textSurface, chr, _left * _vm->_textSurfaceMultiplier, _top * _vm->_textSurfaceMultiplier, _color, _shadowColor);
@@ -834,7 +834,7 @@ void CharsetRendererV3::drawChar(int chr, Graphics::Surface &s, int x, int y) {
 		height = 8;
 	}
 	dst = (byte *)s.pixels + y * s.pitch + x;
-	drawBits1(s, dst, charPtr, y, width, height, s.bytesPerPixel);
+	drawBits1(s, dst, charPtr, y, width, height, s.format.bytesPerPixel);
 }
 
 void CharsetRenderer::translateColor() {
@@ -1096,7 +1096,7 @@ void CharsetRendererClassic::printCharIntern(bool is2byte, const byte *charPtr,
 		} else
 #endif
 		if (is2byte) {
-			drawBits1(dstSurface, dstPtr, charPtr, drawTop, origWidth, origHeight, dstSurface.bytesPerPixel);
+			drawBits1(dstSurface, dstPtr, charPtr, drawTop, origWidth, origHeight, dstSurface.format.bytesPerPixel);
 		} else {
 			drawBitsN(dstSurface, dstPtr, charPtr, *_fontPtr, drawTop, origWidth, origHeight, _vm->_textSurfaceMultiplier == 2);
 		}
@@ -1173,7 +1173,7 @@ void CharsetRendererClassic::drawChar(int chr, Graphics::Surface &s, int x, int
 	dst = (byte *)s.pixels + y * s.pitch + x;
 
 	if (is2byte) {
-		drawBits1(s, dst, charPtr, y, width, height, s.bytesPerPixel);
+		drawBits1(s, dst, charPtr, y, width, height, s.format.bytesPerPixel);
 	} else {
 		drawBitsN(s, dst, charPtr, *_fontPtr, y, width, height);
 	}
@@ -1519,10 +1519,10 @@ void CharsetRendererNES::printChar(int chr, bool ignoreCharsetMask) {
 
 	if (ignoreCharsetMask || !vs->hasTwoBuffers) {
 		dst = vs->getPixels(_left, drawTop);
-		drawBits1(*vs, dst, charPtr, drawTop, origWidth, origHeight, vs->bytesPerPixel);
+		drawBits1(*vs, dst, charPtr, drawTop, origWidth, origHeight, vs->format.bytesPerPixel);
 	} else {
 		dst = (byte *)_vm->_textSurface.pixels + _top * _vm->_textSurface.pitch + _left;
-		drawBits1(_vm->_textSurface, dst, charPtr, drawTop, origWidth, origHeight, _vm->_textSurface.bytesPerPixel);
+		drawBits1(_vm->_textSurface, dst, charPtr, drawTop, origWidth, origHeight, _vm->_textSurface.format.bytesPerPixel);
 	}
 
 	if (_str.left > _left)
@@ -1552,7 +1552,7 @@ void CharsetRendererNES::drawChar(int chr, Graphics::Surface &s, int x, int y) {
 	height = 8;
 
 	dst = (byte *)s.pixels + y * s.pitch + x;
-	drawBits1(s, dst, charPtr, y, width, height, s.bytesPerPixel);
+	drawBits1(s, dst, charPtr, y, width, height, s.format.bytesPerPixel);
 }
 
 void CharsetRendererNES::drawBits1(const Graphics::Surface &s, byte *dst, const byte *src, int drawTop, int width, int height, uint8 bitDepth, bool scalex) {
diff --git a/engines/scumm/cursor.cpp b/engines/scumm/cursor.cpp
index bb3c4bcc02..820605924c 100644
--- a/engines/scumm/cursor.cpp
+++ b/engines/scumm/cursor.cpp
@@ -385,7 +385,7 @@ void ScummEngine_v5::redefineBuiltinCursorFromChar(int index, int chr) {
 		s.pitch = s.w;
 		// s.h = 17 for FM-TOWNS Loom Japanese. Fixes bug #1166917
 		assert(s.w <= 16 && s.h <= 17);
-		s.bytesPerPixel = 1;
+		s.format = Graphics::PixelFormat::createFormatCLUT8();
 
 		_charset->drawChar(chr, s, 0, 0);
 
diff --git a/engines/scumm/gfx.cpp b/engines/scumm/gfx.cpp
index 80c13d30e3..e7abd5610e 100644
--- a/engines/scumm/gfx.cpp
+++ b/engines/scumm/gfx.cpp
@@ -391,8 +391,11 @@ void ScummEngine::initVirtScreen(VirtScreenNumber slot, int top, int width, int
 	vs->hasTwoBuffers = twobufs;
 	vs->xstart = 0;
 	vs->backBuf = NULL;
-	vs->bytesPerPixel = (_game.features & GF_16BIT_COLOR) ? 2 : 1;
-	vs->pitch = width * vs->bytesPerPixel;
+	if (_game.features & GF_16BIT_COLOR)
+		vs->format = Graphics::PixelFormat(2, 5, 5, 5, 0, 10, 5, 0, 0);
+	else
+		vs->format = Graphics::PixelFormat::createFormatCLUT8();
+	vs->pitch = width * vs->format.bytesPerPixel;
 
 	if (_game.version >= 7) {
 		// Increase the pitch by one; needed to accomodate the extra screen
@@ -628,7 +631,7 @@ void ScummEngine::drawStripToScreen(VirtScreen *vs, int x, int width, int top, i
 	int m = _textSurfaceMultiplier;
 	int vsPitch;
 	int pitch = vs->pitch;
-	vsPitch = vs->pitch - width * vs->bytesPerPixel;
+	vsPitch = vs->pitch - width * vs->format.bytesPerPixel;
 
 
 	if (_game.version < 7) {
@@ -673,7 +676,7 @@ void ScummEngine::drawStripToScreen(VirtScreen *vs, int x, int width, int top, i
 					} else {
 						WRITE_UINT16(dstPtr, _16BitPalette[tmp]); dstPtr += 2;
 					}
-					srcPtr += vs->bytesPerPixel;
+					srcPtr += vs->format.bytesPerPixel;
 				}
 				srcPtr += vsPitch;
 				textPtr += _textSurface.pitch - width * m;
@@ -712,7 +715,7 @@ void ScummEngine::drawStripToScreen(VirtScreen *vs, int x, int width, int top, i
 		}
 #endif
 		src = _compositeBuf;
-		pitch = width * vs->bytesPerPixel;
+		pitch = width * vs->format.bytesPerPixel;
 
 		if (_renderMode == Common::kRenderHercA || _renderMode == Common::kRenderHercG) {
 			ditherHerc(_compositeBuf, _herculesBuf, width, &x, &y, &width, &height);
@@ -1042,17 +1045,17 @@ void ScummEngine::restoreBackground(Common::Rect rect, byte backColor) {
 		return;
 
 	if (vs->hasTwoBuffers && _currentRoom != 0 && isLightOn()) {
-		blit(screenBuf, vs->pitch, vs->getBackPixels(rect.left, rect.top), vs->pitch, width, height, vs->bytesPerPixel);
+		blit(screenBuf, vs->pitch, vs->getBackPixels(rect.left, rect.top), vs->pitch, width, height, vs->format.bytesPerPixel);
 		if (vs->number == kMainVirtScreen && _charset->_hasMask) {
 #ifndef DISABLE_TOWNS_DUAL_LAYER_MODE
 			if (_game.platform == Common::kPlatformFMTowns) {
 				byte *mask = (byte *)_textSurface.getBasePtr(rect.left * _textSurfaceMultiplier, (rect.top + vs->topline) * _textSurfaceMultiplier);
-				fill(mask, _textSurface.pitch, 0, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.bytesPerPixel);
+				fill(mask, _textSurface.pitch, 0, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.format.bytesPerPixel);
 			} else
 #endif
 			{
 				byte *mask = (byte *)_textSurface.getBasePtr(rect.left, rect.top - _screenTop);
-				fill(mask, _textSurface.pitch, CHARSET_MASK_TRANSPARENCY, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.bytesPerPixel);
+				fill(mask, _textSurface.pitch, CHARSET_MASK_TRANSPARENCY, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.format.bytesPerPixel);
 			}
 		}
 	} else {
@@ -1060,14 +1063,14 @@ void ScummEngine::restoreBackground(Common::Rect rect, byte backColor) {
 		if (_game.platform == Common::kPlatformFMTowns) {
 			backColor |= (backColor << 4);
 			byte *mask = (byte *)_textSurface.getBasePtr(rect.left * _textSurfaceMultiplier, (rect.top + vs->topline) * _textSurfaceMultiplier);
-			fill(mask, _textSurface.pitch, backColor, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.bytesPerPixel);
+			fill(mask, _textSurface.pitch, backColor, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.format.bytesPerPixel);
 		}
 #endif
 			
 		if (_game.features & GF_16BIT_COLOR)
-			fill(screenBuf, vs->pitch, _16BitPalette[backColor], width, height, vs->bytesPerPixel);
+			fill(screenBuf, vs->pitch, _16BitPalette[backColor], width, height, vs->format.bytesPerPixel);
 		else
-			fill(screenBuf, vs->pitch, backColor, width, height, vs->bytesPerPixel);
+			fill(screenBuf, vs->pitch, backColor, width, height, vs->format.bytesPerPixel);
 	}
 }
 
@@ -1096,7 +1099,7 @@ void ScummEngine::restoreCharsetBg() {
 			if (vs->number != kMainVirtScreen) {
 				// Restore from back buffer
 				const byte *backBuf = vs->getBackPixels(0, 0);
-				blit(screenBuf, vs->pitch, backBuf, vs->pitch, vs->w, vs->h, vs->bytesPerPixel);
+				blit(screenBuf, vs->pitch, backBuf, vs->pitch, vs->w, vs->h, vs->format.bytesPerPixel);
 			}
 		} else {
 			// Clear area
@@ -1124,7 +1127,7 @@ void ScummEngine::clearTextSurface() {
 #ifndef DISABLE_TOWNS_DUAL_LAYER_MODE
 		_game.platform == Common::kPlatformFMTowns ? 0 :
 #endif		
-		CHARSET_MASK_TRANSPARENCY,  _textSurface.w, _textSurface.h, _textSurface.bytesPerPixel);
+		CHARSET_MASK_TRANSPARENCY,  _textSurface.w, _textSurface.h, _textSurface.format.bytesPerPixel);
 }
 
 byte *ScummEngine::getMaskBuffer(int x, int y, int z) {
@@ -1297,56 +1300,56 @@ void ScummEngine::drawBox(int x, int y, int x2, int y2, int color) {
 			if (vs->number != kMainVirtScreen)
 				error("can only copy bg to main window");
 
-			blit(backbuff, vs->pitch, bgbuff, vs->pitch, width, height, vs->bytesPerPixel);
+			blit(backbuff, vs->pitch, bgbuff, vs->pitch, width, height, vs->format.bytesPerPixel);
 			if (_charset->_hasMask) {
 				byte *mask = (byte *)_textSurface.getBasePtr(x * _textSurfaceMultiplier, (y - _screenTop) * _textSurfaceMultiplier);
-				fill(mask, _textSurface.pitch, CHARSET_MASK_TRANSPARENCY, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.bytesPerPixel);
+				fill(mask, _textSurface.pitch, CHARSET_MASK_TRANSPARENCY, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.format.bytesPerPixel);
 			}
 		}
 	} else if (_game.heversion >= 72) {
 		// Flags are used for different methods in HE games
 		uint32 flags = color;
 		if ((flags & 0x2000) || (flags & 0x4000000)) {
-			blit(backbuff, vs->pitch, bgbuff, vs->pitch, width, height, vs->bytesPerPixel);
+			blit(backbuff, vs->pitch, bgbuff, vs->pitch, width, height, vs->format.bytesPerPixel);
 		} else if ((flags & 0x4000) || (flags & 0x2000000)) {
-			blit(bgbuff, vs->pitch, backbuff, vs->pitch, width, height, vs->bytesPerPixel);
+			blit(bgbuff, vs->pitch, backbuff, vs->pitch, width, height, vs->format.bytesPerPixel);
 		} else if ((flags & 0x8000) || (flags & 0x1000000)) {
 			flags &= (flags & 0x1000000) ? 0xFFFFFF : 0x7FFF;
-			fill(backbuff, vs->pitch, flags, width, height, vs->bytesPerPixel);
-			fill(bgbuff, vs->pitch, flags, width, height, vs->bytesPerPixel);
+			fill(backbuff, vs->pitch, flags, width, height, vs->format.bytesPerPixel);
+			fill(bgbuff, vs->pitch, flags, width, height, vs->format.bytesPerPixel);
 		} else {
-			fill(backbuff, vs->pitch, flags, width, height, vs->bytesPerPixel);
+			fill(backbuff, vs->pitch, flags, width, height, vs->format.bytesPerPixel);
 		}
 	} else if (_game.heversion >= 60) {
 		// Flags are used for different methods in HE games
 		uint16 flags = color;
 		if (flags & 0x2000) {
-			blit(backbuff, vs->pitch, bgbuff, vs->pitch, width, height, vs->bytesPerPixel);
+			blit(backbuff, vs->pitch, bgbuff, vs->pitch, width, height, vs->format.bytesPerPixel);
 		} else if (flags & 0x4000) {
-			blit(bgbuff, vs->pitch, backbuff, vs->pitch, width, height, vs->bytesPerPixel);
+			blit(bgbuff, vs->pitch, backbuff, vs->pitch, width, height, vs->format.bytesPerPixel);
 		} else if (flags & 0x8000) {
 			flags &= 0x7FFF;
-			fill(backbuff, vs->pitch, flags, width, height, vs->bytesPerPixel);
-			fill(bgbuff, vs->pitch, flags, width, height, vs->bytesPerPixel);
+			fill(backbuff, vs->pitch, flags, width, height, vs->format.bytesPerPixel);
+			fill(bgbuff, vs->pitch, flags, width, height, vs->format.bytesPerPixel);
 		} else {
-			fill(backbuff, vs->pitch, flags, width, height, vs->bytesPerPixel);
+			fill(backbuff, vs->pitch, flags, width, height, vs->format.bytesPerPixel);
 		}
 	} else {
 		if (_game.features & GF_16BIT_COLOR) {
-			fill(backbuff, vs->pitch, _16BitPalette[color], width, height, vs->bytesPerPixel);
+			fill(backbuff, vs->pitch, _16BitPalette[color], width, height, vs->format.bytesPerPixel);
 		} else {
 #ifndef DISABLE_TOWNS_DUAL_LAYER_MODE
 			if (_game.platform == Common::kPlatformFMTowns) {
 				color = ((color & 0x0f) << 4) | (color & 0x0f);
 				byte *mask = (byte *)_textSurface.getBasePtr(x * _textSurfaceMultiplier, (y - _screenTop + vs->topline) * _textSurfaceMultiplier);
-				fill(mask, _textSurface.pitch, color, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.bytesPerPixel);
+				fill(mask, _textSurface.pitch, color, width * _textSurfaceMultiplier, height * _textSurfaceMultiplier, _textSurface.format.bytesPerPixel);
 				
 				if (_game.id == GID_MONKEY2 || _game.id == GID_INDY4 || ((_game.id == GID_INDY3 || _game.id == GID_ZAK) && vs->number != kTextVirtScreen) || (_game.id == GID_LOOM && vs->number == kMainVirtScreen))
 					return;
 			}
 #endif
 			
-			fill(backbuff, vs->pitch, color, width, height, vs->bytesPerPixel);
+			fill(backbuff, vs->pitch, color, width, height, vs->format.bytesPerPixel);
 		}
 	}
 }
@@ -1385,7 +1388,7 @@ void ScummEngine_v5::drawFlashlight() {
 										_flashlight.y, _flashlight.y + _flashlight.h, USAGE_BIT_DIRTY);
 
 		if (_flashlight.buffer) {
-			fill(_flashlight.buffer, vs->pitch, 0, _flashlight.w, _flashlight.h, vs->bytesPerPixel);
+			fill(_flashlight.buffer, vs->pitch, 0, _flashlight.w, _flashlight.h, vs->format.bytesPerPixel);
 		}
 		_flashlight.isDrawn = false;
 	}
@@ -1432,20 +1435,20 @@ void ScummEngine_v5::drawFlashlight() {
 	_flashlight.buffer = vs->getPixels(_flashlight.x, _flashlight.y);
 	bgbak = vs->getBackPixels(_flashlight.x, _flashlight.y);
 
-	blit(_flashlight.buffer, vs->pitch, bgbak, vs->pitch, _flashlight.w, _flashlight.h, vs->bytesPerPixel);
+	blit(_flashlight.buffer, vs->pitch, bgbak, vs->pitch, _flashlight.w, _flashlight.h, vs->format.bytesPerPixel);
 
 	// Round the corners. To do so, we simply hard-code a set of nicely
 	// rounded corners.
 	static const int corner_data[] = { 8, 6, 4, 3, 2, 2, 1, 1 };
 	int minrow = 0;
-	int maxcol = (_flashlight.w - 1) * vs->bytesPerPixel;
+	int maxcol = (_flashlight.w - 1) * vs->format.bytesPerPixel;
 	int maxrow = (_flashlight.h - 1) * vs->pitch;
 
 	for (i = 0; i < 8; i++, minrow += vs->pitch, maxrow -= vs->pitch) {
 		int d = corner_data[i];
 
 		for (j = 0; j < d; j++) {
-			if (vs->bytesPerPixel == 2) {
+			if (vs->format.bytesPerPixel == 2) {
 				WRITE_UINT16(&_flashlight.buffer[minrow + 2 * j], 0);
 				WRITE_UINT16(&_flashlight.buffer[minrow + maxcol - 2 * j], 0);
 				WRITE_UINT16(&_flashlight.buffer[maxrow + 2 * j], 0);
@@ -1761,7 +1764,7 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, const int y, const
 	}
 #endif
 
-	_vertStripNextInc = height * vs->pitch - 1 * vs->bytesPerPixel;
+	_vertStripNextInc = height * vs->pitch - 1 * vs->format.bytesPerPixel;
 
 	_objectMode = (flag & dbObjectMode) == dbObjectMode;
 	prepareDrawBitmap(ptr, vs, x, y, width, height, stripnr, numstrip);
@@ -1794,9 +1797,9 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, const int y, const
 		// In the case of a double buffered virtual screen, we draw to
 		// the backbuffer, otherwise to the primary surface memory.
 		if (vs->hasTwoBuffers)
-			dstPtr = vs->backBuf + y * vs->pitch + (x * 8 * vs->bytesPerPixel);
+			dstPtr = vs->backBuf + y * vs->pitch + (x * 8 * vs->format.bytesPerPixel);
 		else
-			dstPtr = (byte *)vs->pixels + y * vs->pitch + (x * 8 * vs->bytesPerPixel);
+			dstPtr = (byte *)vs->pixels + y * vs->pitch + (x * 8 * vs->format.bytesPerPixel);
 
 		transpStrip = drawStrip(dstPtr, vs, x, y, width, height, stripnr, smap_ptr);
 
@@ -1805,11 +1808,11 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, const int y, const
 			transpStrip = true;
 
 		if (vs->hasTwoBuffers) {
-			byte *frontBuf = (byte *)vs->pixels + y * vs->pitch + (x * 8 * vs->bytesPerPixel);
+			byte *frontBuf = (byte *)vs->pixels + y * vs->pitch + (x * 8 * vs->format.bytesPerPixel);
 			if (lightsOn)
-				copy8Col(frontBuf, vs->pitch, dstPtr, height, vs->bytesPerPixel);
+				copy8Col(frontBuf, vs->pitch, dstPtr, height, vs->format.bytesPerPixel);
 			else
-				clear8Col(frontBuf, vs->pitch, height, vs->bytesPerPixel);
+				clear8Col(frontBuf, vs->pitch, height, vs->format.bytesPerPixel);
 		}
 
 		decodeMask(x, y, width, height, stripnr, numzbuf, zplane_list, transpStrip, flag, tmsk_ptr);
@@ -2045,7 +2048,7 @@ void Gdi::drawBMAPBg(const byte *ptr, VirtScreen *vs) {
 		drawStripHE(dst, vs->pitch, bmap_ptr, vs->w, vs->h, true);
 		break;
 	case 150:
-		fill(dst, vs->pitch, *bmap_ptr, vs->w, vs->h, vs->bytesPerPixel);
+		fill(dst, vs->pitch, *bmap_ptr, vs->w, vs->h, vs->format.bytesPerPixel);
 		break;
 	default:
 		// Alternative russian freddi3 uses badly formatted bitmaps
@@ -2156,7 +2159,7 @@ void ScummEngine_v70he::restoreBackgroundHE(Common::Rect rect, int dirtybit) {
 
 	assert(rw <= _screenWidth && rw > 0);
 	assert(rh <= _screenHeight && rh > 0);
-	blit(dst, _virtscr[kMainVirtScreen].pitch, src, _virtscr[kMainVirtScreen].pitch, rw, rh, vs->bytesPerPixel);
+	blit(dst, _virtscr[kMainVirtScreen].pitch, src, _virtscr[kMainVirtScreen].pitch, rw, rh, vs->format.bytesPerPixel);
 	markRectAsDirty(kMainVirtScreen, rect, dirtybit);
 }
 #endif
@@ -2186,15 +2189,15 @@ void Gdi::resetBackground(int top, int bottom, int strip) {
 	if (bottom > vs->bdirty[strip])
 		vs->bdirty[strip] = bottom;
 
-	bgbak_ptr = (byte *)vs->backBuf + top * vs->pitch + (strip + vs->xstart/8) * 8 * vs->bytesPerPixel;
-	backbuff_ptr = (byte *)vs->pixels + top * vs->pitch + (strip + vs->xstart/8) * 8 * vs->bytesPerPixel;
+	bgbak_ptr = (byte *)vs->backBuf + top * vs->pitch + (strip + vs->xstart/8) * 8 * vs->format.bytesPerPixel;
+	backbuff_ptr = (byte *)vs->pixels + top * vs->pitch + (strip + vs->xstart/8) * 8 * vs->format.bytesPerPixel;
 
 	numLinesToProcess = bottom - top;
 	if (numLinesToProcess) {
 		if (_vm->isLightOn()) {
-			copy8Col(backbuff_ptr, vs->pitch, bgbak_ptr, numLinesToProcess, vs->bytesPerPixel);
+			copy8Col(backbuff_ptr, vs->pitch, bgbak_ptr, numLinesToProcess, vs->format.bytesPerPixel);
 		} else {
-			clear8Col(backbuff_ptr, vs->pitch, numLinesToProcess, vs->bytesPerPixel);
+			clear8Col(backbuff_ptr, vs->pitch, numLinesToProcess, vs->format.bytesPerPixel);
 		}
 	}
 }
diff --git a/engines/scumm/gfx.h b/engines/scumm/gfx.h
index c6062ef9be..3f69d75efd 100644
--- a/engines/scumm/gfx.h
+++ b/engines/scumm/gfx.h
@@ -158,11 +158,11 @@ struct VirtScreen : Graphics::Surface {
 	}
 
 	byte *getPixels(int x, int y) const {
-		return (byte *)pixels + y * pitch + (xstart + x) * bytesPerPixel;
+		return (byte *)pixels + y * pitch + (xstart + x) * format.bytesPerPixel;
 	}
 
 	byte *getBackPixels(int x, int y) const {
-		return (byte *)backBuf + y * pitch + (xstart + x) * bytesPerPixel;
+		return (byte *)backBuf + y * pitch + (xstart + x) * format.bytesPerPixel;
 	}
 };
 
diff --git a/engines/scumm/gfx_towns.cpp b/engines/scumm/gfx_towns.cpp
index abf2da63a6..78c7ef23f1 100644
--- a/engines/scumm/gfx_towns.cpp
+++ b/engines/scumm/gfx_towns.cpp
@@ -48,7 +48,7 @@ void ScummEngine::towns_drawStripToScreen(VirtScreen *vs, int dstX, int dstY, in
 
 	int dp1 = _townsScreen->getLayerPitch(0) - width * _townsScreen->getLayerBpp(0);
 	int dp2 = _townsScreen->getLayerPitch(1) - width * m * _townsScreen->getLayerBpp(1);
-	int sp1 = vs->pitch - (width * vs->bytesPerPixel);
+	int sp1 = vs->pitch - (width * vs->format.bytesPerPixel);
 	int sp2 = _textSurface.pitch - width * m;
 				
 	if (vs->number == kMainVirtScreen || _game.id == GID_INDY3 || _game.id == GID_ZAK) {
diff --git a/engines/scumm/scumm.cpp b/engines/scumm/scumm.cpp
index 0e7ceff195..f43aed53f7 100644
--- a/engines/scumm/scumm.cpp
+++ b/engines/scumm/scumm.cpp
@@ -1222,7 +1222,7 @@ void ScummEngine::setupScumm() {
 	setupCharsetRenderer();
 
 	// Create and clear the text surface
-	_textSurface.create(_screenWidth * _textSurfaceMultiplier, _screenHeight * _textSurfaceMultiplier, 1);
+	_textSurface.create(_screenWidth * _textSurfaceMultiplier, _screenHeight * _textSurfaceMultiplier, Graphics::PixelFormat::createFormatCLUT8());
 	clearTextSurface();
 
 	// Create the costume renderer