RtZ: Fixed bug which caused PMV videos to look odd (noticeable in the intro movie) and optimized frame decompression code.

svn-id: r32182

1 files changed, 110 insertions, 1 deletions

diff --git a/engines/made/graphics.cpp b/engines/made/graphics.cpp
index 081621ef18..76b39ed43a 100644
--- a/engines/made/graphics.cpp
+++ b/engines/made/graphics.cpp
@@ -47,7 +47,6 @@ void decompressImage(byte *source, Graphics::Surface &surface, uint16 cmdOffs, u
 
 	byte *destPtr = (byte*)surface.getBasePtr(0, 0);
 
-	//byte lineBuf[320 * 4];
 	byte lineBuf[640 * 4];
 	byte bitBuf[40];
 
@@ -149,4 +148,114 @@ void decompressImage(byte *source, Graphics::Surface &surface, uint16 cmdOffs, u
 
 }
 
+void decompressMovieImage(byte *source, Graphics::Surface &surface, uint16 cmdOffs, uint16 pixelOffs, uint16 maskOffs, uint16 lineSize) {
+
+	uint16 width = surface.w;
+	uint16 height = surface.h;
+	uint16 bx = 0, by = 0, bw = ((width + 3) / 4) * 4;
+
+	byte *cmdBuffer = source + cmdOffs;
+	byte *maskBuffer = source + maskOffs;
+	byte *pixelBuffer = source + pixelOffs;
+
+	byte *destPtr = (byte*)surface.getBasePtr(0, 0);
+
+	byte bitBuf[40];
+
+	int bitBufLastOfs = (((lineSize + 1) >> 1) << 1) - 2;
+	int bitBufLastCount = ((width + 3) >> 2) & 7;
+	if (bitBufLastCount == 0)
+		bitBufLastCount = 8;
+		
+	debug(1, "width = %d; bw = %d", width, bw);
+
+	while (height > 0) {
+
+		int drawDestOfs = 0;
+
+		memcpy(bitBuf, cmdBuffer, lineSize);
+		cmdBuffer += lineSize;
+
+		for (uint16 bitBufOfs = 0; bitBufOfs < lineSize; bitBufOfs += 2) {
+
+			uint16 bits = READ_LE_UINT16(&bitBuf[bitBufOfs]);
+
+			int bitCount;
+			if (bitBufOfs == bitBufLastOfs)
+				bitCount = bitBufLastCount;
+			else
+				bitCount = 8;
+
+			for (int curCmd = 0; curCmd < bitCount; curCmd++) {
+				uint cmd = bits & 3;
+				bits >>= 2;
+
+				byte pixels[4], block[16];
+				uint32 mask;
+
+				switch (cmd) {
+
+				case 0:
+					pixels[0] = *pixelBuffer++;
+					for (int i = 0; i < 16; i++)
+						block[i] = pixels[0];
+					break;
+
+				case 1:
+					pixels[0] = *pixelBuffer++;
+					pixels[1] = *pixelBuffer++;
+					mask = READ_LE_UINT16(maskBuffer);
+					maskBuffer += 2;
+					for (int i = 0; i < 16; i++) {
+						block[i] = pixels[mask & 1];
+						mask >>= 1;
+					}
+					break;
+
+				case 2:
+					pixels[0] = *pixelBuffer++;
+					pixels[1] = *pixelBuffer++;
+					pixels[2] = *pixelBuffer++;
+					pixels[3] = *pixelBuffer++;
+					mask = READ_LE_UINT32(maskBuffer);
+					maskBuffer += 4;
+					for (int i = 0; i < 16; i++) {
+						block[i] = pixels[mask & 3];
+						mask >>= 2;
+					}
+					break;
+
+				case 3:
+					break;
+
+				}
+
+				if (cmd != 3) {
+					uint16 blockPos = 0;
+					uint32 maxW = MIN(4, surface.w - bx);
+					uint32 maxH = (MIN(4, surface.h - by) + by) * width;
+					for (uint32 yc = by * width; yc < maxH; yc += width) {
+						for (uint32 xc = 0; xc < maxW; xc++) {
+							destPtr[(bx + xc) + yc] = block[xc + blockPos];
+						}
+						blockPos += 4;
+					}
+				}
+
+				bx += 4;
+				if (bx >= bw) {
+					bx = 0;
+					by += 4;
+				}
+
+			}
+
+		}
+
+		height -= 4;
+
+	}
+
+}
+
 } // End of namespace Made