1 files changed, 35 insertions, 0 deletions
diff --git a/libmscgen/gd_lodepng.c b/libmscgen/gd_lodepng.c
new file mode 100644
index 0000000..b8ed22b
--- /dev/null
+++ b/libmscgen/gd_lodepng.c
@@ -0,0 +1,35 @@
+#include "gd.h"
+#include "lodepng.h"
+
+BGD_DECLARE(void) gdImagePng (gdImagePtr im, FILE * outFile)
+{
+  unsigned char *buffer;
+  size_t bufferSize;
+  int **ptpixels = im->tpixels;
+  unsigned char *pixelBuffer = (unsigned char *)malloc(3*im->sx*im->sy);
+  unsigned char *pOut = pixelBuffer;
+  int x,y;
+  for (y=0;y<im->sy;y++)
+  {
+    int *pThisRow = *ptpixels++;
+    for (x=0;x<im->sx;x++)
+    {
+      int thisPixel = *pThisRow++;
+      *pOut++ = gdTrueColorGetRed(thisPixel);
+      *pOut++ = gdTrueColorGetGreen(thisPixel);
+      *pOut++ = gdTrueColorGetBlue(thisPixel);
+    }
+  }
+  // TODO: convert ptPixels into pixelBuffer...
+  LodePNG_Encoder encoder;
+  LodePNG_Encoder_init(&encoder);
+  encoder.infoPng.color.colorType = 2; // 2=RGB 24 bit
+  encoder.infoRaw.color.colorType = 2; // 2=RGB 24 bit
+  LodePNG_encode(&encoder, &buffer, &bufferSize, pixelBuffer, im->sx, im->sy);
+  // write bufferSize bytes from buffer into outFile
+  fwrite(buffer,1,bufferSize,outFile);
+  LodePNG_Encoder_cleanup(&encoder);
+  free(buffer);
+  free(pixelBuffer);
+}
+