SCI32: Implement GfxText32::getTextCount

2 files changed, 43 insertions, 0 deletions

diff --git a/engines/sci/graphics/text32.cpp b/engines/sci/graphics/text32.cpp
index fa19047a4c..99ffc6e328 100644
--- a/engines/sci/graphics/text32.cpp
+++ b/engines/sci/graphics/text32.cpp
@@ -625,4 +625,33 @@ int16 GfxText32::getStringWidth(const Common::String &text) {
 	return getTextWidth(text, 0, 10000);
 }
 
+int16 GfxText32::getTextCount(const Common::String &text, const uint index, const Common::Rect &textRect, const bool doScaling) {
+	const int16 scriptWidth = g_sci->_gfxFrameout->getCurrentBuffer().scriptWidth;
+	const int16 scriptHeight = g_sci->_gfxFrameout->getCurrentBuffer().scriptHeight;
+
+	Common::Rect scaledRect(textRect);
+	if (doScaling) {
+		mulinc(scaledRect, Ratio(_scaledWidth, scriptWidth), Ratio(_scaledHeight, scriptHeight));
+	}
+
+	Common::String oldText = _text;
+	_text = text;
+
+	uint charIndex = index;
+	int16 maxWidth = scaledRect.width();
+	int16 lineCount = (scaledRect.height() - 2) / _font->getHeight();
+	while (lineCount--) {
+		getLongest(&charIndex, maxWidth);
+	}
+
+	_text = oldText;
+	return charIndex - index;
+}
+
+int16 GfxText32::getTextCount(const Common::String &text, const uint index, const GuiResourceId fontId, const Common::Rect &textRect, const bool doScaling) {
+	setFont(fontId);
+	return getTextCount(text, index, textRect, doScaling);
+}
+
+
 } // End of namespace Sci
diff --git a/engines/sci/graphics/text32.h b/engines/sci/graphics/text32.h
index 472d5e0956..5768ea0c59 100644
--- a/engines/sci/graphics/text32.h
+++ b/engines/sci/graphics/text32.h
@@ -458,6 +458,20 @@ public:
 	 * Retrieves the width of a line of text.
 	 */
 	int16 getStringWidth(const Common::String &text);
+
+	/**
+	 * Gets the number of characters of `text`, starting
+	 * from `index`, that can be safely rendered into
+	 * `textRect`.
+	 */
+	int16 getTextCount(const Common::String &text, const uint index, const Common::Rect &textRect, const bool doScaling);
+
+	/**
+	 * Gets the number of characters of `text`, starting
+	 * from `index`, that can be safely rendered into
+	 * `textRect` using the given font.
+	 */
+	int16 getTextCount(const Common::String &text, const uint index, const GuiResourceId fontId, const Common::Rect &textRect, const bool doScaling);
 };
 
 } // End of namespace Sci