Add range palette table. Completes basic port of the game

graphics/traveler/Kconfig

@@ -4,6 +4,7 @@
 #
 
 if GRAPHICS_TRAVELER
+comment "Color configuration"
 
 choice
 	prompt "Color format"
@@ -17,6 +18,16 @@ config GRAPHICS_TRAVELER_RGB32_888
 
 endchoice # Color format
 
+config GRAPHICS_TRAVELER_PALRANGES
+	bool "Use ranged palette"
+	default y
+	---help---
+		If this option is false, then the whole palette table is loaded from
+		the graphics file.  Otherwise, the palette table will be calculated
+		from a range table.  Default y, this is a good thing.
+
+comment "Input device selection"
+
 config GRAPHICS_TRAVELER_JOYSTICK
 	bool
 	default n
@@ -49,6 +60,8 @@ config GRAPHICS_TRAVELER_JOYDEV
 	default "/dev/djoy0" if GRAPHICS_TRAVELER_DJOYSTICK
 	depends on GRAPHICS_TRAVELER_JOYSTICK
 
+comment "Debug options"
+
 config GRAPHICS_TRAVELER_PERFMON
 	bool "Performance monitor"
 	default y

graphics/traveler/Makefile

@@ -48,7 +48,7 @@ STACKSIZE = 2048
 ASRCS   =
 CSRCS   = trv_bitmapfile.c trv_bitmaps.c trv_color.c trv_doors.c
 CSRCS  += trv_fsutils.c trv_graphicfile.c trv_graphics.c trv_input.c
-CSRCS  += trv_mem.c trv_pcx.c trv_planefiles.c trv_planelists.c
+CSRCS  += trv_mem.c trv_paltbl.c trv_pcx.c trv_planefiles.c trv_planelists.c
 CSRCS  += trv_pov.c trv_rayavoid.c trv_raycast.c trv_raycntl.c
 CSRCS  += trv_rayprune.c trv_rayrend.c trv_texturefile.c trv_trigtbl.c
 CSRCS  += trv_world.c

graphics/traveler/src/trv_paltbl.c

@@ -0,0 +1,348 @@
+/*******************************************************************************
+ * apps/graphics/traveler/src/trv_paltbl.c
+ * This file contains the logic that creates the range palette table that is
+ * used to modify the palette with range to hit
+ *
+ *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included files
+ ****************************************************************************/
+
+#include "trv_types.h"
+#include "trv_mem.h"
+#include "trv_color.h"
+#include "trv_fsutils.h"
+#include "trv_world.h"
+#include "trv_bitmaps.h"
+#include "trv_paltable.h"
+
+#include <stdio.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* This indicates the maximum number of palette ranges which may be
+ * specified in the file
+ */
+
+#ifdef CONFIG_GRAPHICS_TRAVELER_PALRANGES
+# define MAX_PAL_RANGES 64
+#endif
+
+/****************************************************************************
+ * Private Type Declarations
+ ***************************************************************************/
+
+#ifdef CONFIG_GRAPHICS_TRAVELER_PALRANGES
+struct trv_palrange_s
+{
+  uint8_t firstcolor;
+  int8_t  colorrange;
+  uint8_t clipColor;
+};
+#endif
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/* This is the palette table which is used to adjust the texture values
+ * with distance
+ */
+
+trv_pixel_t *g_paltable[NUM_ZONES];
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: trv_allocate_paltbl
+ *
+ * Description:
+ *
+ ***************************************************************************/
+
+static int trv_allocate_paltbl(uint32_t entrysize)
+{
+  int i;
+
+  for (i = 0; i < NUM_ZONES; i++)
+    {
+      g_paltable[i] = (FAR trv_pixel_t*)
+        trv_malloc(entrysize * sizeof(trv_pixel_t));
+
+      if (g_paltable[i] == NULL)
+        {
+          return -ENOMEM;
+        }
+    }
+
+  return OK;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: trv_load_paltable
+ *
+ * Description:
+ *   This function loads the g_paltable from the specified file
+ *
+ ***************************************************************************/
+
+int trv_load_paltable(FAR const char *file)
+{
+#ifdef CONFIG_GRAPHICS_TRAVELER_PALRANGES
+  struct trv_palrange_s ranges[MAX_PAL_RANGES];
+  trv_pixel_t plotcolor;
+  FAR trv_pixel_t *palptr;
+  FAR FILE  *fp;
+  int16_t nranges;
+  int16_t zone;
+  int16_t palndx;
+  int ret;
+  int i;
+
+  /* Open the file which contains the palette table */
+
+  fp = fopen(file, "r");
+  if (!fp)
+    {
+      int errcode = errno;
+      fprintf(stderr, "ERROR: Failed to open %s: %d\n", file, errcode);
+      return -errcode;
+    }
+
+  /* Read the number of ranges from the file */
+
+  nranges = trv_read_decimal(fp);
+  if (nranges > MAX_PAL_RANGES)
+    {
+      fprintf(stderr, "ERROR: Too many ranges: %d\n", nranges);
+      fclose(fp);
+      return -E2BIG;
+    }
+
+  /* Then read all of the palette range data from the file */
+
+  for (i = 0; i < nranges; i++)
+    {
+      ranges[i].firstcolor = trv_read_decimal(fp);
+      ranges[i].colorrange = trv_read_decimal(fp);
+      ranges[i].clipColor  = trv_read_decimal(fp);
+    }
+
+  /* We are now done with the input file */
+
+  fclose(fp);
+
+  /* Allocate memory to hold the palette range mapping data */
+
+  ret = trv_allocate_paltbl(PALETTE_SIZE);
+  if (ret < 0)
+    {
+      fprintf(stderr,
+              "ERROR: Failed to allocate range mapping table: %d\n",
+              ret);
+      return ret;
+    }
+
+  /* Process each distance zone */
+
+  for (zone = 0; zone < NUM_ZONES; zone++)
+    {
+      /* Point to the palette mapping data for this zone */
+
+      palptr = g_paltable[zone];
+
+      /* Process each possible palette index within the zone */
+
+      for (palndx = 0; palndx < PALETTE_SIZE; palndx++)
+        {
+          /* Assume that the range will not be found.  In this case, we
+           * will perform the 1-to-1 mapping
+           */
+
+          plotcolor = palndx;
+
+          /* Find the range the color is in. */
+
+          for (i = 0; i < nranges; i++)
+            {
+              /* Check if the color range is ascending or descending */
+
+              if (ranges[i].colorrange < 0)
+                {
+                  /* The colors are descending */
+
+                  if ((palndx <= ranges[i].firstcolor) &&
+                      (palndx > (ranges[i].firstcolor + ranges[i].colorrange)))
+                    {
+                      /* Found it, set the new plotcolor */
+
+                      if (plotcolor > zone)
+                        {
+                          /* Offset the color by the zone we are processing */
+
+                          plotcolor -= zone;
+
+                          /* Check if we have exceeded the range of this
+                           * color.  If so, then set the color to the
+                           * clipColor
+                           */
+
+                          if (plotcolor <= ranges[i].firstcolor + ranges[i].colorrange)
+                            {
+                              plotcolor = ranges[i].clipColor;
+                            }
+                        }
+                      else
+                        {
+                          plotcolor = ranges[i].clipColor;
+                        }
+
+                      /* Now break out of the loop */
+
+                      break;
+                    }
+                }
+
+              /* The colors are ascending */
+
+              else if ((palndx >= ranges[i].firstcolor) &&
+                       (palndx < (ranges[i].firstcolor + ranges[i].colorrange)))
+                {
+                  /* Found it, set the new plotcolor */
+
+                  plotcolor += zone;
+
+                  /* Check if we have exceeded the range of this color.  If so,
+                   * then set the color to black
+                   */
+
+                  if (plotcolor >= ranges[i].firstcolor + ranges[i].colorrange)
+                    {
+                      plotcolor = ranges[i].clipColor;
+                    }
+
+                  /* Now break out of the loop */
+
+                  break;
+                }
+            }
+
+          /* Save the plotcolor in the g_paltable */
+
+          palptr[palndx] = plotcolor;
+
+        }
+    }
+
+  return OK;
+#else
+  FILE  *fp;
+  int16_t zone;
+  int16_t palndx;
+  FAR uint8_t *palptr;
+  int ret;
+
+  /* Allocate memory to hold the palette range mapping data */
+
+  ret = trv_allocate_paltbl(PALETTE_SIZE);
+  if (ret < 0)
+    {
+      fprintf(stderr,
+              "ERROR: Failed to allocate range mapping table: %d\n",
+              ret);
+      return ret;
+    }
+
+  /* Open the file which contains the palette table */
+
+  fp = fopen(file, "r");
+  if (!fp)
+    {
+      int errcode = errno;
+      fprintf(stderr, "ERROR: Failed to open %s: %d\n", file, errcode);
+      return -errcode;
+    }
+
+  /* Process each distance zone */
+
+  for (zone = 0; zone < NUM_ZONES; zone++)
+    {
+      /* Point to the palette mapping data for this zone */
+
+      palptr = GET_PALPTR(zone);
+
+      /* Process each possible palette index within the zone */
+
+      for (palndx = 0; palndx < PALETTE_SIZE; palndx++)
+        {
+          /* Read the data into g_paltable */
+
+          palptr[palndx] = trv_read_decimal(fp);
+        }
+    }
+
+  fclose(fp);
+  return OK;
+#endif /* CONFIG_GRAPHICS_TRAVELER_PALRANGES */
+}
+
+/*************************************************************************
+ * Function: trv_release_paltable
+ *
+ * Description:
+ *
+ ************************************************************************/
+
+void trv_release_paltable(void)
+{
+  int i;
+
+  for (i = 0; i < NUM_ZONES; i++)
+    {
+      if (g_paltable[i])
+        {
+          trv_free(g_paltable[i]);
+          g_paltable[i] = NULL;
+        }
+    }
+}