Same optimisation for VESADisplay

3 files changed, 19 insertions, 0 deletions

diff --git a/Source/Kernel/Devices/Display/GraphicDisplay.proto.h b/Source/Kernel/Devices/Display/GraphicDisplay.proto.h
index 9608ada..f58f5cf 100644
--- a/Source/Kernel/Devices/Display/GraphicDisplay.proto.h
+++ b/Source/Kernel/Devices/Display/GraphicDisplay.proto.h
@@ -10,6 +10,7 @@ extern u32int consoleColor[16];
 #define C_FONT_HEIGHT 16
 
 class GraphicDisplay : public Display {
+	protected:
 	struct {
 		int line, col;
 		u32int buff[C_FONT_WIDTH][C_FONT_HEIGHT];
diff --git a/Source/Kernel/Devices/Display/VESADisplay.class.cpp b/Source/Kernel/Devices/Display/VESADisplay.class.cpp
index 7c4adca..2992910 100644
--- a/Source/Kernel/Devices/Display/VESADisplay.class.cpp
+++ b/Source/Kernel/Devices/Display/VESADisplay.class.cpp
@@ -300,3 +300,20 @@ void VESADisplay::drawChar(u16int line, u16int col, WChar c, u8int color) {
 		y++;
 	}
 }
+
+bool VESADisplay::textScroll(u16int line, u16int col, u16int height, u16int width, u8int color) {
+	u8int* start = memPos(col * C_FONT_WIDTH, line * C_FONT_HEIGHT);
+	u32int count = width * C_FONT_WIDTH * m_pixWidth;
+	u32int diff = C_FONT_HEIGHT * m_currMode.pitch;
+	putCsrBuff();
+	for (int i = 0; i < (height - 1) * C_FONT_HEIGHT; i++) {
+		memcpy(start, start + diff, count);
+		start += m_currMode.pitch;
+	}
+	for (u32int i = 0; i < width; i++) {
+		drawChar(line + height - 1, col + i, " ", color);
+	}
+	m_csrBuff.line--;
+	drawCsr();
+	return true;
+}
diff --git a/Source/Kernel/Devices/Display/VESADisplay.class.h b/Source/Kernel/Devices/Display/VESADisplay.class.h
index a6001e2..c3bae82 100644
--- a/Source/Kernel/Devices/Display/VESADisplay.class.h
+++ b/Source/Kernel/Devices/Display/VESADisplay.class.h
@@ -77,6 +77,7 @@ class VESADisplay : public GraphicDisplay {
 
 	//Advanced graphical functions, recoded for being optimized
 	virtual void drawChar(u16int line, u16int col, WChar c, u8int color);
+	bool textScroll(u16int line, u16int col, u16int height, u16int width, u8int color);
 };
 
 #endif