diff options
Diffstat (limited to 'engines/tinsel')
| -rw-r--r-- | engines/tinsel/graphics.cpp | 65 |
1 files changed, 59 insertions, 6 deletions
diff --git a/engines/tinsel/graphics.cpp b/engines/tinsel/graphics.cpp index 5f200b5e2f..b23f6bc8a4 100644 --- a/engines/tinsel/graphics.cpp +++ b/engines/tinsel/graphics.cpp @@ -212,6 +212,59 @@ static void t0WrtNonZero(DRAWOBJECT *pObj, uint8 *srcP, uint8 *destP, bool apply } /** + * Straight rendering with transparency support, Mac variant + */ +static void MacDrawTiles(DRAWOBJECT *pObj, uint8 *srcP, uint8 *destP, bool applyClipping) { + // TODO: Finish off clipping + + if (applyClipping) { + // Adjust the height down to skip any bottom clipping + pObj->height -= pObj->botClip; + + // Make adjustment for the top clipping row + srcP += sizeof(uint16) * ((pObj->width + 3) >> 2) * (pObj->topClip >> 2); + pObj->height -= pObj->topClip; + pObj->topClip %= 4; + } + + // Simple RLE-like scheme: the two first bytes of each data chunk determine + // if bytes should be repeated or copied. + // Example: 10 00 00 20 will repeat byte 0x0 0x10 times, and will copy 0x20 + // bytes from the input stream afterwards + + // Vertical loop + for (int y = 0; y < pObj->height; ++y) { + // Horizontal loop + for (int x = 0; x < pObj->width; ) { + byte repeatBytes = *srcP++; + if (repeatBytes > 0) { + byte fillColor = *srcP++; + if (fillColor > 0) // color 0 is transparent + memset(destP, fillColor, repeatBytes); + destP += repeatBytes; + x += repeatBytes; + } else { + byte copyBytes = *srcP++; + for (int z = 0; z < copyBytes; ++z) { + if (*srcP > 0) // color 0 is transparent + *destP = *srcP; + srcP++; + destP++; + } + // Round up to the next even number + if (copyBytes % 2) + srcP++; + x += copyBytes; + } + } // horizontal loop + + // Move to next line + destP += (SCREEN_WIDTH - pObj->width); + } // vertical loop +} + + +/** * Straight rendering with transparency support, PSX variant supporting also 4-BIT clut data */ static void PsxDrawTiles(DRAWOBJECT *pObj, uint8 *srcP, uint8 *destP, bool applyClipping, bool fourBitClut, uint32 psxSkipBytes, byte *psxMapperTable, bool transparency) { @@ -272,7 +325,7 @@ static void PsxDrawTiles(DRAWOBJECT *pObj, uint8 *srcP, uint8 *destP, bool apply assert(boxBounds.bottom >= boxBounds.top); assert(boxBounds.right >= boxBounds.left); - int16 indexVal = READ_16(srcP); + int16 indexVal = READ_LE_UINT16(srcP); srcP += sizeof(uint16); // Draw a 4x4 block based on the opcode as in index into the block list @@ -381,7 +434,7 @@ static void WrtNonZero(DRAWOBJECT *pObj, uint8 *srcP, uint8 *destP, bool applyCl assert(boxBounds.bottom >= boxBounds.top); assert(boxBounds.right >= boxBounds.left); - int16 indexVal = READ_16(srcP); + int16 indexVal = READ_LE_UINT16(srcP); srcP += sizeof(uint16); if (indexVal >= 0) { @@ -763,8 +816,8 @@ void DrawObject(DRAWOBJECT *pObj) { byte *p = (byte *)LockMem(pObj->hBits & HANDLEMASK); srcPtr = p + (pObj->hBits & OFFSETMASK); - pObj->charBase = (char *)p + READ_32(p + 0x10); - pObj->transOffset = READ_32(p + 0x14); + pObj->charBase = (char *)p + READ_LE_UINT32(p + 0x10); + pObj->transOffset = READ_LE_UINT32(p + 0x14); // Decompress block indexes for Discworld PSX if (TinselV1PSX) { @@ -793,7 +846,7 @@ void DrawObject(DRAWOBJECT *pObj) { psxPaletteMapper(pObj->pPal, srcPtr + sizeof(uint16), psxMapperTable); psxFourBitClut = true; - psxSkipBytes = READ_32(p + sizeof(uint32) * 5) << 4; // Fetch number of bytes we have to skip + psxSkipBytes = READ_LE_UINT32(p + sizeof(uint32) * 5) << 4; // Fetch number of bytes we have to skip switch (indexType) { case 0xDD: // Normal uncompressed indexes psxRLEindex = false; @@ -852,7 +905,7 @@ void DrawObject(DRAWOBJECT *pObj) { else if (TinselV1PSX) PsxDrawTiles(pObj, srcPtr, destPtr, typeId == 0x41, psxFourBitClut, psxSkipBytes, psxMapperTable, true); else if (TinselV1Mac) - {} // TODO + MacDrawTiles(pObj, srcPtr, destPtr, typeId == 0x41); else if (TinselV1) WrtNonZero(pObj, srcPtr, destPtr, typeId == 0x41); else if (TinselV0) |