From bfb28c7a399662bca7269f9e5dbc8788b7bb4d58 Mon Sep 17 00:00:00 2001
From: uruk
Date: Tue, 1 Oct 2013 08:51:07 +0200
Subject: AVALANCHE: Move drawSign() from Dialogs to Graphics. Implement it.

---
 engines/avalanche/dialogs.cpp  | 30 ++----------------------------
 engines/avalanche/dialogs.h    |  1 -
 engines/avalanche/graphics.cpp | 34 ++++++++++++++++++++++++++++++++++
 engines/avalanche/graphics.h   |  1 +
 4 files changed, 37 insertions(+), 29 deletions(-)

diff --git a/engines/avalanche/dialogs.cpp b/engines/avalanche/dialogs.cpp
index 551b45e984..9557b36b74 100644
--- a/engines/avalanche/dialogs.cpp
+++ b/engines/avalanche/dialogs.cpp
@@ -381,32 +381,6 @@ void Dialogs::getIcon(int16 x, int16 y, byte which) {
 	file.close();
 }
 
-void Dialogs::drawSign(Common::String fn, int16 xl, int16 yl, int16 y) {
-	Common::File file;
-	Common::String filename = Common::String::format("%s.avd", fn.c_str());
-
-	if (!file.open(filename))
-		error("AVALANCHE: Scrolls: File not found: %s", filename.c_str());
-
-#if 0
-	uint16 st = (y - 1) * 80 + (40 - xl / 2) + ((1 - _vm->cp) * _vm->pagetop);
-	byte bit;
-	for (uint16 i = 1; i <= yl; i++)
-		for (bit = 0; bit <= 3; bit++) {
-			port[0x3c4] = 2;
-			port[0x3ce] = 4;
-			port[0x3c5] = 1 << bit;
-			port[0x3cf] = bit;
-			blockread(f, mem[0xa000 * st + (i * 80)], xl);
-		}
-	bit = getpixel(0, 0);
-#endif
-
-	warning("STUB: Scrolls::drawSign()");
-
-	file.close();
-}
-
 void Dialogs::drawScroll(DialogFunctionType modeFunc) {
 	int16 lx = 0;
 	int16 ly = (_maxLineNum + 1) * 6;
@@ -438,11 +412,11 @@ void Dialogs::drawScroll(DialogFunctionType modeFunc) {
 		iconIndent = 0;
 		break; // No icon.
 	case 34:
-		drawSign("about", 28, 76, 15);
+		_vm->_graphics->drawSign("about", 28, 76, 15);
 		iconIndent = 0;
 		break;
 	case 35:
-		drawSign("gameover", 52, 59, 71);
+		_vm->_graphics->drawSign("gameover", 52, 59, 71);
 		iconIndent = 0;
 		break;
 	}
diff --git a/engines/avalanche/dialogs.h b/engines/avalanche/dialogs.h
index fec842907d..19ee9e36a2 100644
--- a/engines/avalanche/dialogs.h
+++ b/engines/avalanche/dialogs.h
@@ -126,7 +126,6 @@ private:
 	void resetScrollDriver();
 	void ringBell(); // Original: dingdongbell
 	void getIcon(int16 x, int16 y, byte which);
-	void drawSign(Common::String name, int16 xl, int16 yl, int16 y); // This is for drawing a big "about" or "gameover" picture loaded from a file into an empty scroll.
 	void loadFont();
 
 	// From Visa:
diff --git a/engines/avalanche/graphics.cpp b/engines/avalanche/graphics.cpp
index 2d3d82ebd7..4435e5939b 100644
--- a/engines/avalanche/graphics.cpp
+++ b/engines/avalanche/graphics.cpp
@@ -560,6 +560,40 @@ void GraphicManager::drawReadyLight(Color color) {
 	_surface.fillRect(Common::Rect(419, 195, 438, 197), color);
 }
 
+void GraphicManager::drawSign(Common::String fn, int16 xl, int16 yl, int16 y) {
+	Common::File file;
+	Common::String filename = Common::String::format("%s.avd", fn.c_str());
+
+	if (!file.open(filename))
+		error("AVALANCHE: Scrolls: File not found: %s", filename.c_str());
+
+	// I know it looks very similar to the loadPicture methods, but in truth it's the combination of the two.
+
+	uint16 width = xl * 8;
+	uint16 height = yl;
+
+	Graphics::Surface sign; // We make a Surface object for the picture itself.
+	sign.create(width, height, Graphics::PixelFormat::createFormatCLUT8());
+
+	// Produce the picture. We read it in row-by-row, and every row has 4 planes.
+	for (int y = 0; y < height; y++) {
+		for (int8 plane = 0; plane < 4; plane++) { // The planes are in the "right" order.
+			for (uint16 x = 0; x < width; x += 8) {
+				byte pixel = file.readByte();
+				for (int bit = 0; bit < 8; bit++) {
+					byte pixelBit = (pixel >> bit) & 1;
+					if (pixelBit != 0)
+						*(byte *)sign.getBasePtr(x + 7 - bit, y) += (pixelBit << plane);
+				}
+			}
+		}
+	}
+	
+	drawPicture(_scrolls, sign, kScreenWidth / 2 - width / 2, y);
+
+	file.close();
+}
+
 void GraphicManager::prepareBubble(int xc, int xw, int my, Common::Point points[3]) {
 	// Backup the screen before drawing the bubble.
 	_scrolls.copyFrom(_surface);
diff --git a/engines/avalanche/graphics.h b/engines/avalanche/graphics.h
index c78ac56a9c..aa9c209c4f 100644
--- a/engines/avalanche/graphics.h
+++ b/engines/avalanche/graphics.h
@@ -104,6 +104,7 @@ public:
 	void drawToolbar();
 	void drawCursor(byte pos);
 	void drawReadyLight(Color color);
+	void drawSign(Common::String name, int16 xl, int16 yl, int16 y); // This is for drawing a big "about" or "gameover" picture loaded from a file into an empty scroll.
 
 	void prepareBubble(int xc, int xw, int my, Common::Point points[3]);
 
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