rnd-19981110-1

[rocksndiamonds.git] / src / image.c

diff --git a/src/image.c b/src/image.c
index f72ea2305a97e7ed77ce1438f67c192b353fb065..d75de85516a59de7dd74c26286c30d30fb9a192c 100644 (file)
--- a/src/image.c
+++ b/src/image.c
@@ -862,3 +862,105 @@ void freeXImage(Image *image, XImageInfo *ximageinfo)
   free((byte *)ximageinfo);
   /* should we free private color map to ??? */
 }
+
+
+
+/* this table is useful for quick conversions between depth and ncolors
+ */
+
+unsigned long DepthToColorsTable[] =
+{
+  /*  0 */ 1,
+  /*  1 */ 2,
+  /*  2 */ 4,
+  /*  3 */ 8,
+  /*  4 */ 16,
+  /*  5 */ 32,
+  /*  6 */ 64,
+  /*  7 */ 128,
+  /*  8 */ 256,
+  /*  9 */ 512,
+  /* 10 */ 1024,
+  /* 11 */ 2048,
+  /* 12 */ 4096,
+  /* 13 */ 8192,
+  /* 14 */ 16384,
+  /* 15 */ 32768,
+  /* 16 */ 65536,
+  /* 17 */ 131072,
+  /* 18 */ 262144,
+  /* 19 */ 524288,
+  /* 20 */ 1048576,
+  /* 21 */ 2097152,
+  /* 22 */ 4194304,
+  /* 23 */ 8388608,
+  /* 24 */ 16777216
+};
+
+void newRGBMapData(RGBMap *rgb, unsigned int size)
+{
+  rgb->used = 0;
+  rgb->size = size;
+  rgb->compressed = FALSE;
+  rgb->red = (Intensity *)checked_malloc(sizeof(Intensity) * size);
+  rgb->green = (Intensity *)checked_malloc(sizeof(Intensity) * size);
+  rgb->blue = (Intensity *)checked_malloc(sizeof(Intensity) * size);
+}
+
+void freeRGBMapData(RGBMap *rgb)
+{
+  free((byte *)rgb->red);
+  free((byte *)rgb->green);
+  free((byte *)rgb->blue);
+}
+
+Image *newBitImage(unsigned int width, unsigned int height)
+{
+  Image        *image;
+  unsigned int  linelen;
+
+  image = (Image *)checked_malloc(sizeof(Image));
+  image->type = IBITMAP;
+  newRGBMapData(&(image->rgb), (unsigned int)2);
+  *(image->rgb.red)= *(image->rgb.green) = *(image->rgb.blue)= 65535;
+  *(image->rgb.red + 1)= *(image->rgb.green + 1) = *(image->rgb.blue + 1)= 0;
+  image->rgb.used = 2;
+  image->width = width;
+  image->height = height;
+  image->depth = 1;
+  linelen = ((width + 7) / 8);
+  image->data = (unsigned char *)checked_calloc(linelen * height);
+  return(image);
+}
+
+Image *newRGBImage(unsigned int width, unsigned int height, unsigned int depth)
+{
+  Image        *image;
+  unsigned int  pixlen, numcolors;
+
+  if (depth == 0)      /* special case for `zero' depth image, which is */
+    depth = 1;         /* sometimes interpreted as `one color' */
+  pixlen = ((depth+7) / 8);
+  numcolors = depthToColors(depth);
+  image = (Image *)checked_malloc(sizeof(Image));
+  image->type = IRGB;
+  newRGBMapData(&(image->rgb), numcolors);
+  image->width = width;
+  image->height = height;
+  image->depth = depth;
+  image->pixlen = pixlen;
+  image->data = (unsigned char *)checked_malloc(width * height * pixlen);
+  return(image);
+}
+
+void freeImageData(Image *image)
+{
+  freeRGBMapData(&(image->rgb));
+  free(image->data);
+}
+
+void freeImage(Image *image)
+{
+  freeImageData(image);
+  free((byte *)image);
+}