DREAMWEB: First attempt at unstubbing showpcx()

This is untested and incomplete, but I'm too tired to do an more
with it tonight, and it doesn't seem to cause any catastrophic
failures. Yet.

1 files changed, 99 insertions, 2 deletions

diff --git a/engines/dreamweb/dreamweb.cpp b/engines/dreamweb/dreamweb.cpp
index e88898bb43..4714511296 100644
--- a/engines/dreamweb/dreamweb.cpp
+++ b/engines/dreamweb/dreamweb.cpp
@@ -498,11 +498,108 @@ void setmode(Context &context) {
 }
 
 void readoneblock(Context &context) {
-	::error("readoneblock");
+	context.ds = context.data.word(kWorkspace);
+	context.cx = 30000;
+	context.dx = 0;
+	readfromfile(context);
+}
+
+// TODO: This is already defined in dreamgen.cpp, so expose it should be
+//       exposed from there. Once that's done, remove this copy!
+
+static void readabyte(Context & context) {
+	context._cmp(context.si, 30000);
+	if (!context.flags.z()) goto notendblock;
+	context.push(context.bx);
+	context.push(context.es);
+	context.push(context.di);
+	context.push(context.ds);
+	context.push(context.si);
+	readoneblock(context);
+	context.si = context.pop();
+	context.ds = context.pop();
+	context.di = context.pop();
+	context.es = context.pop();
+	context.bx = context.pop();
+	context.si = 0;
+notendblock:
+	context._lodsb();
 }
 
 void showpcx(Context &context) {
-	warning("showpcx");
+	openfile(context);
+	context.ds = context.data.word(kWorkspace);
+	context.cx = 128;
+	context.dx = 0;
+	readfromfile(context);
+
+	context.ds = context.data.word(kWorkspace);
+	context.si = 16;
+	context.cx = 48;
+	context.es = context.data.word(kBuffers);
+	context.di = 0+(228*13)+32+60+(32*32)+(11*10*3)+768+768;
+pcxpal:
+	context.push(context.cx);
+	readabyte(context);
+	context._shr(context.al, 1);
+	context._shr(context.al, 1);
+	context._stosb();
+	context.cx = context.pop();
+	if (--context.cx) goto pcxpal;
+	context.cx = 768 - 48;
+	context.ax = 0x0ffff;
+	while (--context.cx) context._stosw();
+
+	readoneblock(context);
+	context.si = 0;
+	context.di = 0;
+	context.cx = 480;
+convertpcx:
+	context.push(context.cx);
+	context.push(context.di);
+	context.ds = context.data.word(kWorkspace);
+	context.es = context.data.word(kBuffers);
+	context.di = 0+(228*13)+32+60;
+	context.bx = 0;
+sameline:
+	readabyte(context);
+	context.ah = context.al;
+	context._and(context.ah, 0xc0);
+	context._cmp(context.ah, 0xc0);
+	if (!context.flags.z()) goto normal;
+	context.cl = context.al;
+	context._and(context.cl, 0x3f);
+	context.ch = 0;
+	context.push(context.cx);
+	readabyte(context);
+	context.cx = context.pop();
+	context._add(context.bx, context.cx);
+	if (--context.cx) context._stosb();
+	context._cmp(context.bx, 4 * 80);
+	if (!context.flags.z()) goto sameline;
+	goto endline;
+normal:
+	context._stosb();
+	context._add(context.bx, 1);
+	context._cmp(context.bx, 4 * 80);
+	if (!context.flags.z()) goto sameline;
+
+endline:
+	context.di = context.pop();
+	context.push(context.si);
+	context.dx = 0xa000;
+	context.es = context.dx;
+	context.si = 0+(228*13)+32+60;
+	context.ds = context.data.word(kBuffers);
+
+	// TODO: There's a bunch of code here which I assume draws data to the
+	//       screen or something like that.
+
+	context.si = context.pop();
+	context.cx = context.pop();
+	if (--context.cx) goto convertpcx;
+
+	closefile(context);
 }
 
 } /*namespace dreamgen */