1 files changed, 293 insertions, 0 deletions
diff --git a/src/cd_bitmap.c b/src/cd_bitmap.c
new file mode 100644
index 0000000..234668c
--- /dev/null
+++ b/src/cd_bitmap.c
@@ -0,0 +1,293 @@
+/** \file
+ * \brief cdBitmap implementation
+ *
+ * See Copyright Notice in cd.h
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <assert.h>
+#include <memory.h>
+#include <math.h>
+#include <stdarg.h>
+
+
+#include "cd.h"
+#include "cdirgb.h"
+
+#include "cd_private.h"
+
+
+typedef struct _cdBitmapData 
+{
+  void *buffer;
+
+  unsigned char *index;  /* pointers into buffer */
+  unsigned char *r;
+  unsigned char *g;
+  unsigned char *b;
+  unsigned char *a;
+
+  long* colors;
+
+  int xmin, xmax, ymin, ymax;
+} cdBitmapData;
+
+
+cdBitmap* cdCreateBitmap(int w, int h, int type)
+{
+  int num_channel;
+  int size = w * h;
+  cdBitmap* bitmap;
+  cdBitmapData* data;
+
+  assert(w>0);
+  assert(h>0);
+  if (w <= 0) return NULL;
+  if (h <= 0) return NULL;
+
+  switch (type)
+  {
+  case CD_RGB:
+    num_channel = 3;
+    break;
+  case CD_RGBA:
+    num_channel = 4;
+    break;
+  case CD_MAP:
+    num_channel = 1;
+    break;
+  default:
+    return NULL;
+  }
+
+  bitmap = (cdBitmap*)malloc(sizeof(cdBitmap));
+  data = (cdBitmapData*)malloc(sizeof(cdBitmapData));
+  memset(data, 0, sizeof(cdBitmapData));
+
+  bitmap->w = w;
+  bitmap->h = h;
+  bitmap->type = type;
+  bitmap->data = data;
+
+  data->buffer = malloc(size*num_channel);
+  if (!data->buffer)
+  {
+    free(data);
+    free(bitmap);
+    return NULL;
+  }
+
+  if (type == CD_RGB)
+  {
+    data->r = data->buffer;
+    data->g = data->r + size;
+    data->b = data->g + size;
+    memset(data->r, 255, 3*size);    /* white */
+  }
+
+  if (type == CD_RGBA)
+  {
+    data->a = data->b + size;
+    memset(data->a, 0, size);    /* transparent */
+  }
+
+  if (type == CD_MAP)
+  {
+    data->index = data->buffer;
+    data->colors = (long*)calloc(256, sizeof(long));
+    memset(data->index, 0, size);    /* index=0 */
+  }
+
+  data->xmin = 0;
+  data->ymin = 0;
+  data->xmax = bitmap->w-1;
+  data->ymax = bitmap->h-1;
+
+  return bitmap;
+}
+
+cdBitmap* cdInitBitmap(int w, int h, int type, ...)
+{
+  va_list arglist;
+  cdBitmap* bitmap;
+  cdBitmapData* data;
+
+  assert(w>0);
+  assert(h>0);
+  if (w <= 0) return NULL;
+  if (h <= 0) return NULL;
+
+  if (type != CD_RGB && 
+      type != CD_RGBA &&
+      type != CD_MAP)
+    return NULL;
+
+  bitmap = (cdBitmap*)malloc(sizeof(cdBitmap));
+  data = (cdBitmapData*)malloc(sizeof(cdBitmapData));
+  memset(data, 0, sizeof(cdBitmapData));
+
+  bitmap->w = w;
+  bitmap->h = h;
+  bitmap->type = type;
+  bitmap->data = data;
+
+  va_start(arglist, type);
+
+  if (type == CD_RGB)
+  {
+    data->r = va_arg(arglist, unsigned char*);
+    data->g = va_arg(arglist, unsigned char*);
+    data->b = va_arg(arglist, unsigned char*);
+  }
+
+  if (type == CD_RGBA)
+    data->a = va_arg(arglist, unsigned char*);
+
+  if (type == CD_MAP)
+  {
+    data->index = va_arg(arglist, unsigned char*);
+    data->colors = va_arg(arglist, long*);
+  }
+
+  data->xmin = 0;
+  data->ymin = 0;
+  data->xmax = bitmap->w-1;
+  data->ymax = bitmap->h-1;
+
+  return bitmap;
+}
+
+void cdKillBitmap(cdBitmap* bitmap)
+{
+  cdBitmapData* data;
+
+  assert(bitmap);
+  assert(bitmap->data);
+  if (!bitmap) return;
+  if (!bitmap->data) return;
+
+  data = (cdBitmapData*)bitmap->data;
+
+  if (data->buffer)
+  {
+    free(data->buffer);
+
+    if (bitmap->type == CD_MAP)
+      free(data->colors);
+  }
+
+  free(data);
+  free(bitmap);
+}
+
+void cdCanvasGetBitmap(cdCanvas* canvas, cdBitmap* bitmap, int x, int y)
+{
+  cdBitmapData* data;
+
+  assert(bitmap);
+  assert(bitmap->data);
+  if (!bitmap) return;
+  if (!bitmap->data) return;
+
+  data = (cdBitmapData*)bitmap->data;
+
+  if (bitmap->type == CD_RGB || bitmap->type == CD_RGBA)
+    cdCanvasGetImageRGB(canvas, data->r, data->g, data->b, x, y, bitmap->w, bitmap->h);
+}
+
+void cdBitmapRGB2Map(cdBitmap* bitmap_rgb, cdBitmap* bitmap_map)
+{
+  cdBitmapData* data_rgb;
+  cdBitmapData* data_map;
+
+  assert(bitmap_rgb);
+  assert(bitmap_rgb->data);
+  assert(bitmap_map);
+  assert(bitmap_map->data);
+  if (!bitmap_rgb) return;
+  if (!bitmap_rgb->data) return;
+  if (!bitmap_map) return;
+  if (!bitmap_map->data) return;
+
+  data_rgb = (cdBitmapData*)bitmap_rgb->data;
+  data_map = (cdBitmapData*)bitmap_map->data;
+
+  if ((bitmap_rgb->type != CD_RGB && bitmap_rgb->type != CD_RGBA) || (bitmap_map->type != CD_MAP))
+    return;
+
+  cdRGB2Map(bitmap_rgb->w, bitmap_rgb->h, data_rgb->r, data_rgb->g, data_rgb->b, data_map->index, bitmap_map->type, data_map->colors);
+}
+
+unsigned char* cdBitmapGetData(cdBitmap* bitmap, int dataptr)
+{
+  cdBitmapData* data;
+
+  assert(bitmap);
+  assert(bitmap->data);
+  if (!bitmap) return NULL;
+  if (!bitmap->data) return NULL;
+
+  data = (cdBitmapData*)bitmap->data;
+
+  switch(dataptr)
+  {
+  case CD_IRED:
+    return data->r;
+  case CD_IGREEN:
+    return data->g;
+  case CD_IBLUE:
+    return data->b;
+  case CD_IALPHA:
+    return data->a;
+  case CD_INDEX:
+    return data->index;
+  case CD_COLORS:
+    return (unsigned char*)data->colors;
+  }
+
+  return NULL;
+}
+
+void cdBitmapSetRect(cdBitmap* bitmap, int xmin, int xmax, int ymin, int ymax)
+{
+  cdBitmapData* data;
+
+  assert(bitmap);
+  assert(bitmap->data);
+  if (!bitmap) return;
+  if (!bitmap->data) return;
+
+  data = (cdBitmapData*)bitmap->data;
+
+  data->xmin = xmin;
+  data->xmax = xmax;
+  data->ymin = ymin;
+  data->ymax = ymax;
+}
+
+void cdCanvasPutBitmap(cdCanvas* canvas, cdBitmap* bitmap, int x, int y, int w, int h)
+{
+  cdBitmapData* data;
+
+  assert(bitmap);
+  assert(bitmap->data);
+  if (!bitmap) return;
+  if (!bitmap->data) return;
+
+  data = (cdBitmapData*)bitmap->data;
+
+  switch(bitmap->type)
+  {
+  case CD_RGB:
+    cdCanvasPutImageRectRGB(canvas, bitmap->w, bitmap->h, data->r, data->g, data->b, x, y, w, h, data->xmin, data->xmax, data->ymin, data->ymax);
+    break;
+  case CD_RGBA:
+    cdCanvasPutImageRectRGBA(canvas, bitmap->w, bitmap->h, data->r, data->g, data->b, data->a, x, y, w, h, data->xmin, data->xmax, data->ymin, data->ymax);
+    break;
+  case CD_MAP:
+    cdCanvasPutImageRectMap(canvas, bitmap->w, bitmap->h, data->index, data->colors, x, y, w, h, data->xmin, data->xmax, data->ymin, data->ymax);
+    break;
+  }
+}