Add: TextMan, font loading and basic text display

1 files changed, 37 insertions, 0 deletions

diff --git a/engines/dm/text.cpp b/engines/dm/text.cpp
new file mode 100644
index 0000000000..116058de35
--- /dev/null
+++ b/engines/dm/text.cpp
@@ -0,0 +1,37 @@
+#include "text.h"
+
+
+namespace DM {
+
+TextMan::TextMan(DMEngine* vm) : _vm(vm) {}
+
+#define kLetterWidth 5
+#define kLetterHeight 6
+
+void TextMan::printTextToBitmap(byte* destBitmap, uint16 destPixelWidth, uint16 destX, uint16 destY, Color textColor, Color bgColor, char* text, uint16 destHeight, Viewport &viewport) {
+	uint16 textLength = strlen(text);
+	uint16 nextX = destX;
+	uint16 nextY = destY;
+	byte *srcBitmap = _vm->_displayMan->getBitmap(kFontGraphicIndice);
+
+
+	for (char *begin = text, *end = text + textLength; begin != end; ++begin) {
+		// Note: this does no wraps in the middle of words
+		if (nextX + kLetterWidth + 1 > destPixelWidth || (*begin == '\n')) {
+			nextX = destX;
+			nextY += kLetterHeight + 1;
+		}
+		if (nextY + kLetterHeight + 1 > destHeight)
+			break;
+		uint16 srcX = (1 + 5) * toupper(*begin); // 1 + 5 is not the letter width, arbitrary choice of the unpacking code
+		_vm->_displayMan->blitToBitmap(srcBitmap, 6 * 128, srcX, 0, destBitmap, destPixelWidth,
+									   nextX, nextX + kLetterWidth + 1, nextY, nextY + kLetterHeight + 1, kColorNoTransparency, viewport);
+		nextX += kLetterWidth + 1;
+	}
+}
+
+void TextMan::printTextToScreen(uint16 destX, uint16 destY, Color textColor, Color bgColor, char* text, Viewport &viewport) {
+	printTextToBitmap(_vm->_displayMan->_vgaBuffer, _vm->_displayMan->_screenWidth, destX, destY, textColor, bgColor, text, _vm->_displayMan->_screenHeight, viewport);
+}
+
+}