Diff: RA8875.cpp

Revision:

72:ecffe56af969

Parent:

71:dcac8efd842d

Child:

73:f22a18707b5e

--- a/RA8875.cpp	Sat Oct 04 17:45:50 2014 +0000
+++ b/RA8875.cpp	Sat Oct 11 17:24:29 2014 +0000
@@ -87,9 +87,8 @@
     } else if (layer > 1) {
         return bad_parameter;
     } else { // layer == 0 ro 1
-        WriteCommand(0x41, mwcr1 | layer);
+        return WriteCommand(0x41, mwcr1 | layer);
     }
-    return noerror;
 }
 
 
@@ -1424,6 +1423,113 @@
     return noerror;
 }
 
+RetCode_t RA8875::PrintScreen(uint16_t layer, loc_t x, loc_t y, dim_t w, dim_t h, const char *Name_BMP)
+{
+    uint16_t curLayer = GetDrawingLayer();
+    RetCode_t ret = SelectDrawingLayer(layer);
+    if (ret == noerror) {
+        ret = PrintScreen(x, y, w, h, Name_BMP);
+    }
+    SelectDrawingLayer(curLayer);
+    return ret;
+}
+
+RetCode_t RA8875::PrintScreen(loc_t x, loc_t y, dim_t w, dim_t h, const char *Name_BMP)
+{
+    BITMAPFILEHEADER BMP_Header;
+    BITMAPINFOHEADER BMP_Info;
+    
+    INFO("(%d,%d) - (%d,%d) %s", x,y,w,h,Name_BMP);
+    if (x >= 0 && x < width()
+    && y >= 0 && y < height()
+    && w > 0 && x + w <= width()
+    && h > 0 && y + h <= height()) {
+
+        BMP_Header.bfType = BF_TYPE;
+        BMP_Header.bfSize = (w * h * sizeof(RGBQUAD)) + sizeof(BMP_Header) + sizeof(BMP_Header);
+        BMP_Header.bfReserved1 = 0;
+        BMP_Header.bfReserved2 = 0;
+        BMP_Header.bfOffBits = sizeof(BMP_Header) + sizeof(BMP_Header);
+        
+        BMP_Info.biSize = sizeof(BMP_Info);
+        BMP_Info.biWidth = w;
+        BMP_Info.biHeight = h;
+        BMP_Info.biPlanes = 1;
+        BMP_Info.biBitCount = 24;
+        BMP_Info.biCompression = BI_RGB;
+        BMP_Info.biSizeImage = 0;
+        BMP_Info.biXPelsPerMeter = 0;
+        BMP_Info.biYPelsPerMeter = 0;
+        BMP_Info.biClrUsed = 0;
+        BMP_Info.biClrImportant = 0;
+
+        INFO("Writing {%s}", Name_BMP);
+        FILE *Image = fopen(Name_BMP, "wb");
+        if (!Image) {
+            ERR("File not found");
+            return(file_not_found);
+        }
+
+        // Be optimistic - don't check for errors.
+        //HexDump("BMP_Header", (uint8_t *)&BMP_Header, sizeof(BMP_Header));
+        fwrite(&BMP_Header, sizeof(char), sizeof(BMP_Header), Image);
+        //INFO("fwrite returned %d", r);
+        
+        //HexDump("BMP_Info", (uint8_t *)&BMP_Info, sizeof(BMP_Info));
+        fwrite(&BMP_Info, sizeof(char), sizeof(BMP_Info), Image);
+        //INFO("fwrite returned %d", r);
+        
+        int lineBufSize = ((24 * w + 7)/8);
+        uint8_t * lineBuffer = (uint8_t *)malloc(lineBufSize);
+        if (lineBuffer == NULL) {
+            fclose(Image);
+            ERR("Not enough RAM for lineBuffer");
+            return(not_enough_ram);
+        }
+        color_t * pixelBuffer = (color_t *)malloc(w * sizeof(color_t));
+        if (pixelBuffer == NULL) {
+            fclose(Image);
+            free(lineBuffer);
+            ERR("Not enough RAM for pixelBuffer");
+            return(not_enough_ram);
+        }
+        
+        // Read the display from the last line toward the top
+        // so we can write the file in one pass.
+        for (int j = h - 1; j >= 0; j--) {
+            // Read one line of pixels to a local buffer
+            if (getPixelStream(pixelBuffer, w, x,y+j) != noerror) {
+                ERR("getPixelStream error, and no recovery handler...");
+            }
+            // Convert the local buffer to RGBQUAD format
+            int lb = 0;
+            for (int i=0; i<w; i++) {
+                color_t pixel = pixelBuffer[x+i];
+                // Scale to 24-bits
+                RGBQUAD q = RGB16ToRGBQuad(pixel);
+                lineBuffer[lb++] = q.rgbBlue;
+                lineBuffer[lb++] = q.rgbGreen;
+                lineBuffer[lb++] = q.rgbRed;
+            }
+            // Write to disk
+            //HexDump("Line", lineBuffer, lineBufSize);
+            fwrite(lineBuffer, sizeof(char), lb, Image);
+        }
+        fclose(Image);
+        free(pixelBuffer);  // don't leak memory.
+        free(lineBuffer);
+        INFO("Image closed"); 
+        return noerror;
+    } else {
+        return bad_parameter;
+    }
+}
+
+
+// ##########################################################################
+// ##########################################################################
+// ##########################################################################
+
 #ifdef TESTENABLE
 
 #include "Arial12x12.h"