# HG changeset patch
# User sl
# Date 1400759197 -7200
# Node ID 23cacc1d17a3d410ab3046cd916aa62e8caaa1c9
# Parent  0d9d062609eb181801b59e1b194fc15f46f04c45
Draft implementation of multiple report pixel command.

diff -r 0d9d062609eb -r 23cacc1d17a3 inc/FutabaVfd.h
--- a/inc/FutabaVfd.h	Thu May 22 11:29:23 2014 +0200
+++ b/inc/FutabaVfd.h	Thu May 22 13:46:37 2014 +0200
@@ -1,4 +1,6 @@
-
+//
+//
+//
 
 #ifndef FUTABA_VFD_H
 #define FUTABA_VFD_H
@@ -6,6 +8,15 @@
 #include "hidapi.h"
 #include "HidDevice.h"
 
+#ifndef MIN
+#define MIN(a,b) (((a)<(b))?(a):(b))
+#endif
+
+#ifndef MAX
+#define MAX(a,b) (((a)>(b))?(a):(b))
+#endif
+
+
 //This was computed from our number of pixels as follow 256x64/8/64 = 32 + 1 = 33
 //+1 was added for our header
 const int KFutabaMaxCommandOutputReport = 33;
@@ -22,9 +33,8 @@
 
 //typedef struct hid_device_info HidDeviceInfo;
 
-
-
 /**
+Define a Futaba HID report.
 */
 class FutabaVfdReport: public HidReport<KFutabaMaxHidReportSize>
 	{
@@ -112,6 +122,7 @@
 
 	//Specific to GP1212A01A
 	void SetPixelBlock(int aX, int aY, int aHeight, int aSize, unsigned char aValue);
+    void SetPixelBlock(int aX, int aY, int aHeight, int aSize, unsigned char* aPixels);
     //
     void RequestId();
     void RequestFirmwareRevision();
diff -r 0d9d062609eb -r 23cacc1d17a3 src/FutabaVfd.cpp
--- a/src/FutabaVfd.cpp	Thu May 22 11:29:23 2014 +0200
+++ b/src/FutabaVfd.cpp	Thu May 22 13:46:37 2014 +0200
@@ -147,7 +147,7 @@
 @param Y coordinate of our pixel block starting point.
 @param The height of our pixel block.
 @param The size of our pixel data. Number of pixels divided by 8.
-@param The value set to 8 pixels.
+@param The value set to 8 pixels used as a pattern.
 */
 void GP1212A01A::SetPixelBlock(int aX, int aY, int aHeight, int aSize, unsigned char aValue)
 	{
@@ -168,6 +168,45 @@
 	Write(report);
 	}
 
+/**
+Set the defined pixel block to the given value.
+@param X coordinate of our pixel block starting point.
+@param Y coordinate of our pixel block starting point.
+@param The height of our pixel block.
+@param The size of our pixel data. Number of pixels divided by 8.
+@param Pointer to our pixel data.
+*/
+void GP1212A01A::SetPixelBlock(int aX, int aY, int aHeight, int aSize, unsigned char* aPixels)
+    {
+    FutabaVfdReport report;
+    report[0]=0x00; //Report ID
+    report[1]=0x08+(aSize<=report.Size()-10?aSize:64); //Report length. -10 is for our header first 10 bytes
+    report[2]=0x1B; //Command ID
+    report[3]=0x5B; //Command ID
+    report[4]=0xF0; //Command ID
+    report[5]=aX;   //X
+    report[6]=aY;   //Y
+    report[7]=aHeight; //Y length before return. Though outside the specs, setting this to zero apparently allows us to modify a single pixel without touching any other.
+    unsigned short* sizePtr=(unsigned short*)report.Buffer()+8; //Size of pixel data in bytes (MSB)
+    *sizePtr=aSize; //Put our size over 2 bytes
+    int sizeWritten=MIN(aSize,report.Size()-10);
+    memcpy(report.Buffer()+10, aPixels, sizeWritten);
+    Write(report);
+
+    int remainingSize=aSize;
+    //We need to keep on sending our pixel data until we are done
+    while (report[1]==64)
+        {
+        report.Reset();
+        remainingSize-=sizeWritten;
+        report[0]=0x00; //Report ID
+        report[1]=(remainingSize<=report.Size()-2?aSize:64); //Report length, should be 64 or the remaining size
+        sizeWritten=(report[1]==64?63:report[1]);
+        memcpy(report.Buffer()+2, aPixels+(aSize-remainingSize), sizeWritten);
+        Write(report);
+        }
+    }
+
 
 /**
 Clear our display's screen.