ZVISION: Create methods for converting screen coords to image coords

4 files changed, 35 insertions, 1 deletions

diff --git a/engines/zvision/render_manager.cpp b/engines/zvision/render_manager.cpp
index 132c597140..2d45ad835d 100644
--- a/engines/zvision/render_manager.cpp
+++ b/engines/zvision/render_manager.cpp
@@ -80,6 +80,8 @@ void RenderManager::renderSubRectToScreen(uint16 *buffer, uint32 imageWidth, uin
 		destRect.moveTo((_width - subRectangle.width()) / 2, (_height - subRectangle.height()) / 2);
 	}
 
+	_backgroundOffset = Common::Point(destRect.left, destRect.top);
+
 	if (_renderTable.getRenderState() == RenderTable::FLAT) {
 		_system->copyRectToScreen(buffer + subRectangle.top * horizontalPitch + subRectangle.left, horizontalPitch, destRect.left, destRect.top, destRect.width(), destRect.height());
 	} else {
@@ -139,7 +141,17 @@ void RenderManager::renderImageToScreen(Common::SeekableReadStream &stream, uint
 
 		tga.destroy();
 	}
+}
+
+const Common::Point RenderManager::convertToImageCoords(const Common::Point &point) {
+	Common::Point newPoint(point);
+
+	if (_renderTable.getRenderState() == RenderTable::PANORAMA || _renderTable.getRenderState() == RenderTable::TILT) {
+		newPoint = _renderTable.convertWarpedPointToFlatCoords(newPoint);
+	}
 
+	newPoint -= _backgroundOffset;
+	return newPoint;
 }
 
 RenderTable *RenderManager::getRenderTable() {
diff --git a/engines/zvision/render_manager.h b/engines/zvision/render_manager.h
index 6e267eb395..aea24505a9 100644
--- a/engines/zvision/render_manager.h
+++ b/engines/zvision/render_manager.h
@@ -53,6 +53,7 @@ private:
 	RenderTable _renderTable;
 
 	Common::SeekableReadStream *_currentBackground;
+	Common::Point _backgroundOffset;
 
 	Video::VideoDecoder *_currentVideo;
 	byte *_scaledVideoFrameBuffer;
@@ -90,8 +91,9 @@ public:
 	 */
 	void setBackgroundImage(const Common::String &fileName);
 
-	RenderTable *getRenderTable();
+	const Common::Point convertToImageCoords(const Common::Point &point);
 
+	RenderTable *getRenderTable();
 
 private:
 	void renderSubRectToScreen(uint16 *buffer, uint32 imageWidth, uint32 imageHeight, uint32 horizontalPitch, uint32 destinationX, uint32 destinationY, Common::Rect subRectangle, bool autoCenter);
diff --git a/engines/zvision/render_table.cpp b/engines/zvision/render_table.cpp
index b6598c12b2..2a111ce659 100644
--- a/engines/zvision/render_table.cpp
+++ b/engines/zvision/render_table.cpp
@@ -60,6 +60,16 @@ void RenderTable::setRenderState(RenderState newState) {
 	}
 }
 
+const Common::Point RenderTable::convertWarpedPointToFlatCoords(const Common::Point &point) {
+	uint32 index = point.y * _numColumns + point.x;
+
+	Common::Point newPoint(point);
+	newPoint.x += _internalBuffer[index].x;
+	newPoint.y += _internalBuffer[index].y;
+
+	return newPoint;
+}
+
 uint16 mixTwoRGB(uint16 colorOne, uint16 colorTwo, float percentColorOne) {
 	assert(percentColorOne < 1.0f);
 
@@ -157,7 +167,14 @@ void RenderTable::generatePanoramaLookupTable() {
 }
 
 void RenderTable::generateTiltLookupTable() {
+	for (uint x = 0; x < _numColumns; x++) {
+		for (uint y = 0; y < _numRows; y++) {
+			uint32 index = y * _numColumns + x;
 
+			_internalBuffer[index].x = 0;
+			_internalBuffer[index].y = 0;
+		}
+	}
 }
 
 void RenderTable::setPanoramaFoV(float fov) {
diff --git a/engines/zvision/render_table.h b/engines/zvision/render_table.h
index 82bea62769..5cef062045 100644
--- a/engines/zvision/render_table.h
+++ b/engines/zvision/render_table.h
@@ -63,6 +63,9 @@ private:
 public:
 	RenderState getRenderState() { return _renderState; }
 	void setRenderState(RenderState newState);
+
+	const Common::Point convertWarpedPointToFlatCoords(const Common::Point &point);
+
 	void mutateImage(uint16 *sourceBuffer, uint16* destBuffer, uint32 imageWidth, uint32 imageHeight, Common::Rect subRectangle, Common::Rect destRectangle);
 	void generateRenderTable();