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author | Martin Kiewitz | 2010-06-19 17:12:17 +0000 |
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committer | Martin Kiewitz | 2010-06-19 17:12:17 +0000 |
commit | 26e4e0e345bbfb5b84a53a023b9b78207f859cc7 (patch) | |
tree | 3d8695b2fbbcf327a1f7d4d7d4b2d8ab3ae03cb0 /engines/sci/graphics/view.cpp | |
parent | 78068df9084867faef35a1ada3abe3c4bb764a13 (diff) | |
download | scummvm-rg350-26e4e0e345bbfb5b84a53a023b9b78207f859cc7.tar.gz scummvm-rg350-26e4e0e345bbfb5b84a53a023b9b78207f859cc7.tar.bz2 scummvm-rg350-26e4e0e345bbfb5b84a53a023b9b78207f859cc7.zip |
SCI: cleanup view decompression code
svn-id: r50053
Diffstat (limited to 'engines/sci/graphics/view.cpp')
-rw-r--r-- | engines/sci/graphics/view.cpp | 131 |
1 files changed, 65 insertions, 66 deletions
diff --git a/engines/sci/graphics/view.cpp b/engines/sci/graphics/view.cpp index 6c0f6fda75..7c33f87a14 100644 --- a/engines/sci/graphics/view.cpp +++ b/engines/sci/graphics/view.cpp @@ -323,78 +323,41 @@ void GfxView::unpackCel(int16 loopNo, int16 celNo, byte *outPtr, uint32 pixelCou memset(outPtr + pixelNo, pixel & 0x0F, MIN<uint32>(runLength, pixelCount - pixelNo)); pixelNo += runLength; } - return; - } - - rlePtr = _resourceData + celInfo->offsetRLE; - if (!celInfo->offsetLiteral) { // no additional literal data - if (_resMan->isAmiga32color()) { - // decompression for amiga views - while (pixelNo < pixelCount) { - pixel = *rlePtr++; - if (pixel & 0x07) { // fill with color - runLength = pixel & 0x07; - pixel = pixel >> 3; - while (runLength-- && pixelNo < pixelCount) { - outPtr[pixelNo++] = pixel; - } - } else { // fill with transparent - runLength = pixel >> 3; - pixelNo += runLength; - } - } - return; - } else { - // decompression for data that has just one combined stream - while (pixelNo < pixelCount) { - pixel = *rlePtr++; - runLength = pixel & 0x3F; - switch (pixel & 0xC0) { - case 0: // copy bytes as-is - while (runLength-- && pixelNo < pixelCount) - outPtr[pixelNo++] = *rlePtr++; - break; - case 0x80: // fill with color - memset(outPtr + pixelNo, *rlePtr++, MIN<uint32>(runLength, pixelCount - pixelNo)); - pixelNo += runLength; - break; - case 0xC0: // fill with transparent - pixelNo += runLength; - break; - } - } - return; - } } else { - literalPtr = _resourceData + celInfo->offsetLiteral; - if (celInfo->offsetRLE) { - if (g_sci->getPlatform() == Common::kPlatformMacintosh && getSciVersion() >= SCI_VERSION_1_1) { - // Crazy-Ass compression for SCI1.1+ Mac + // we skip over transparent pixels, so the buffer needs to be already filled with it + // also some RLE compressed cels are possibly ending with the last non-transparent pixel + // (is this even possible with the current code?) + memset(outPtr, _loop[loopNo].cel[celNo].clearKey, pixelCount); + + rlePtr = _resourceData + celInfo->offsetRLE; + if (!celInfo->offsetLiteral) { // no additional literal data + if (_resMan->isAmiga32color()) { + // decompression for amiga views while (pixelNo < pixelCount) { - uint32 pixelLine = pixelNo; - runLength = *rlePtr++; - pixelNo += runLength; - runLength = *rlePtr++; - while (runLength-- && pixelNo < pixelCount) { - outPtr[pixelNo] = *literalPtr++; - if (outPtr[pixelNo] == 255) - outPtr[pixelNo] = 0; - pixelNo++; + pixel = *rlePtr++; + if (pixel & 0x07) { // fill with color + runLength = pixel & 0x07; + pixel = pixel >> 3; + while (runLength-- && pixelNo < pixelCount) { + outPtr[pixelNo++] = pixel; + } + } else { // fill with transparent + runLength = pixel >> 3; + pixelNo += runLength; } - pixelNo = pixelLine + celInfo->width; } } else { - // decompression for data that has separate rle and literal streams + // decompression for data that has just one combined stream while (pixelNo < pixelCount) { pixel = *rlePtr++; runLength = pixel & 0x3F; switch (pixel & 0xC0) { case 0: // copy bytes as-is while (runLength-- && pixelNo < pixelCount) - outPtr[pixelNo++] = *literalPtr++; + outPtr[pixelNo++] = *rlePtr++; break; case 0x80: // fill with color - memset(outPtr + pixelNo, *literalPtr++, MIN<uint32>(runLength, pixelCount - pixelNo)); + memset(outPtr + pixelNo, *rlePtr++, MIN<uint32>(runLength, pixelCount - pixelNo)); pixelNo += runLength; break; case 0xC0: // fill with transparent @@ -404,12 +367,50 @@ void GfxView::unpackCel(int16 loopNo, int16 celNo, byte *outPtr, uint32 pixelCou } } } else { - // literal stream only, so no compression - memcpy(outPtr, literalPtr, pixelCount); + literalPtr = _resourceData + celInfo->offsetLiteral; + if (celInfo->offsetRLE) { + if (g_sci->getPlatform() == Common::kPlatformMacintosh && getSciVersion() >= SCI_VERSION_1_1) { + // Crazy-Ass compression for SCI1.1+ Mac + while (pixelNo < pixelCount) { + uint32 pixelLine = pixelNo; + runLength = *rlePtr++; + pixelNo += runLength; + runLength = *rlePtr++; + while (runLength-- && pixelNo < pixelCount) { + outPtr[pixelNo] = *literalPtr++; + if (outPtr[pixelNo] == 255) + outPtr[pixelNo] = 0; + pixelNo++; + } + pixelNo = pixelLine + celInfo->width; + } + } else { + // decompression for data that has separate rle and literal streams + while (pixelNo < pixelCount) { + pixel = *rlePtr++; + runLength = pixel & 0x3F; + switch (pixel & 0xC0) { + case 0: // copy bytes as-is + while (runLength-- && pixelNo < pixelCount) + outPtr[pixelNo++] = *literalPtr++; + break; + case 0x80: // fill with color + memset(outPtr + pixelNo, *literalPtr++, MIN<uint32>(runLength, pixelCount - pixelNo)); + pixelNo += runLength; + break; + case 0xC0: // fill with transparent + pixelNo += runLength; + break; + } + } + } + } else { + // literal stream only, so no compression + memcpy(outPtr, literalPtr, pixelCount); + pixelNo = pixelCount; + } } - return; } - error("Unable to decompress view"); } byte *GfxView::getBitmap(int16 loopNo, int16 celNo) { @@ -425,9 +426,7 @@ byte *GfxView::getBitmap(int16 loopNo, int16 celNo) { _loop[loopNo].cel[celNo].rawBitmap = new byte[pixelCount]; byte *pBitmap = _loop[loopNo].cel[celNo].rawBitmap; - // Some RLE compressed cels end with the last non-transparent pixel, thats why we fill it up here - // FIXME: change this to fill the remaining bytes within unpackCel() - memset(pBitmap, _loop[loopNo].cel[celNo].clearKey, pixelCount); + // unpack the actual cel bitmap data unpackCel(loopNo, celNo, pBitmap, pixelCount); if (!_resMan->isVGA()) { |