Add map->image tool

mods/README.txt

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+ANARCH MODS
+
+All mods here are created solely by drummyfish and released under the same terms
+as Anarch, i.e. completely public domain (CC0).
+
+Single file mods are right in this directory, multiple file mods are in their
+own subdirectory.
+
+Most mods are diffs and can easily be installed with "git apply", the suckless
+way. The diffs sometimes have comments in them with details about the mod.

mods/makeMapImages.c

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+/** Simple program to export Anarch maps as isometric images in PPM format.
+  The code is not very nice, the goal is just to get the images :)
+
+  by drummyfish, released under CC0 */
+
+#include <stdio.h>
+#include "../game.h"
+
+#define IMAGE_W 4096 // if changed you also have to change PPM header data
+#define IMAGE_H 2500
+
+#define CENTER_X (IMAGE_W / 2)
+#define CENTER_Y (IMAGE_H / 6)
+
+#define TILE_H 25    // vertical height
+#define TILE_TILT 2  // view angle, by how many H pixels we'll shift one down
+ 
+unsigned char image[IMAGE_H * IMAGE_W * 3];
+
+int maxHeights[4]; // ceiling limits for different quadrants
+
+void drawPixel(int x, int y, unsigned char color, int multiply)
+{
+  if (x < 0 || x >= IMAGE_W || y < 0 || y >= IMAGE_H)
+    return;
+
+  uint16_t rgb = paletteRGB565[color];
+
+  int index = (y * IMAGE_W + x) * 3;
+
+  image[index] = ((((rgb >> 11) << 3) & 0xff) * multiply) / 128;
+  image[index + 1] = ((((rgb >> 5) << 2) & 0xff) * multiply) / 128;
+  image[index + 2] = (((rgb << 3) & 0xff) * multiply) / 128;
+}
+
+void drawColum(int x, int y, int z1, int z2, int texture, int doorTexture, const uint8_t *sprite)
+{
+  if (texture == SFG_TILE_TEXTURE_TRANSPARENT)
+    return;
+
+  int inc = z2 > z1 ? 1 : -1;
+
+  int minZ = z1 < z2 ? z1 : z2;
+
+  int brightness = (minZ / 2) % 128;
+
+  if (brightness < 0)
+    brightness *= -1;
+
+  brightness += 30;
+
+  for (int i = 0; i < SFG_TEXTURE_SIZE; ++i) // platform
+    for (int j = -1 * i / TILE_TILT; j <= i / TILE_TILT; ++j)
+    {
+      drawPixel(x + i,y + minZ + j,SFG_currentLevel.floorColor,brightness);
+      drawPixel(x + 2 * SFG_TEXTURE_SIZE - 1 - i,y + minZ + j,SFG_currentLevel.floorColor,brightness);
+    }
+
+  if (sprite != 0)
+    for (int sy = 0; sy < SFG_TEXTURE_SIZE; ++sy)
+      for (int sx = 0; sx < SFG_TEXTURE_SIZE; ++sx)
+      {
+        uint8_t color = SFG_getTexel(sprite,sx,sy);
+
+        if (color != SFG_TRANSPARENT_COLOR)
+          drawPixel(x + sx + SFG_TEXTURE_SIZE / 2,y + minZ + sy - SFG_TEXTURE_SIZE,color,110);
+      }
+
+  if (z1 == z2)
+    return;
+
+  z1 += inc;
+
+  int texY = 0;
+
+  while (z1 != z2) // column (walls)
+  {
+    int ty = (texY * SFG_TEXTURE_SIZE) / TILE_H;
+
+    uint8_t *t = (doorTexture < 0 || ty > SFG_TEXTURE_SIZE) ?
+      SFG_currentLevel.textures[texture] : 
+      (SFG_wallTextures + doorTexture * SFG_TEXTURE_STORE_SIZE);
+
+    for (int i = 0; i < SFG_TEXTURE_SIZE; ++i)
+    {
+      uint8_t color = SFG_getTexel(t,i,ty);
+
+      if (color != SFG_TRANSPARENT_COLOR)
+        drawPixel(x + i,y + z1 + i / TILE_TILT,color,75);
+
+      color = SFG_getTexel(t,SFG_TEXTURE_SIZE - i,ty);
+
+      if (color != SFG_TRANSPARENT_COLOR)
+        drawPixel(x + 2 * SFG_TEXTURE_SIZE - 1 - i,y + z1 + i / TILE_TILT,
+        color,128);
+    }
+
+    texY++;
+    z1 += inc;
+  }
+}
+
+void tileIndexToXY(int n, int *x, int *y)
+{
+  int reverse = 0;
+
+  if (n > SFG_MAP_SIZE * SFG_MAP_SIZE / 2)
+  {
+    reverse = 1;
+    n = SFG_MAP_SIZE * SFG_MAP_SIZE - 1 - n;
+  }
+
+  *y = 0;
+  *x = 0;
+
+  while (*y < n)
+  {
+    *y += 1;
+    n -= *y;
+  }
+
+  while (n > 0)
+  {
+    *x += 1;
+    *y -= 1;
+
+    n--;
+  }
+
+  if (reverse)
+  {
+    *x = SFG_MAP_SIZE - 1 - *x;
+    *y = SFG_MAP_SIZE - 1 - *y;
+  }
+
+  *x = SFG_MAP_SIZE - 1 - *x;
+}
+
+void exportMap(int index)
+{
+  SFG_setAndInitLevel(index);
+
+  for (int i = 0; i < IMAGE_H * IMAGE_W * 3; ++i)
+    image[i] = 0;
+
+  unsigned char header[] =
+    {'P', '6', ' ', '4', '0', '9', '6',   ' ',   '2', '5', '0', '0',  ' ',  
+    '2', '5', '5', '\n'};
+
+  char fname[] = "map0.ppm";
+
+  fname[3] += index;
+
+  FILE *f = fopen(fname,"wb");
+
+  fwrite(header,sizeof(header),1,f);
+
+  int n = 0;
+
+  for (int drawY = 0; drawY < SFG_MAP_SIZE; ++drawY)
+  {
+    for (int i = 0; i < 2; ++i)
+    {
+      int xLimit = (1 + 2 * drawY + i);
+
+      if (drawY >= SFG_MAP_SIZE / 2)
+        xLimit = SFG_MAP_SIZE * 2 - xLimit;
+
+#define TW (2 * SFG_TEXTURE_SIZE)
+#define TH (SFG_TEXTURE_SIZE / TILE_TILT)
+
+      int startX = -1 * xLimit * TW / 2;
+
+      for (int drawX = 0; drawX < xLimit; ++drawX)   
+      {
+        uint8_t properties;
+        int tx, ty;
+
+        tileIndexToXY(n,&tx,&ty);
+
+        int maxHeightTiles = maxHeights[2 * ((ty * 2) / SFG_MAP_SIZE) +
+          (tx * 2) / SFG_MAP_SIZE];
+
+        SFG_TileDefinition tile =
+          SFG_getMapTile(SFG_currentLevel.levelPointer,tx,ty,&properties);
+
+        int h = SFG_TILE_FLOOR_HEIGHT(tile);
+
+        if (properties == SFG_TILE_PROPERTY_ELEVATOR)
+        {
+          h += SFG_TILE_CEILING_HEIGHT(tile);
+          h /= 2;
+        }
+
+        if (maxHeightTiles * 4 < h)
+          h = maxHeightTiles * 4;
+
+        h = (h * SFG_WALL_HEIGHT_STEP * TILE_H) / RCL_UNITS_PER_SQUARE;
+
+        const uint8_t *sprite = 0;
+
+        for (int i = 0; i < SFG_MAX_LEVEL_ELEMENTS; ++i)
+        {
+          SFG_LevelElement e =
+            SFG_currentLevel.levelPointer->elements[i];
+
+          if (e.type == SFG_LEVEL_ELEMENT_NONE)
+            break;
+
+          if (e.coords[0] == tx && e.coords[1] == ty   &&     !(e.type & 0x10))
+          {
+            uint8_t ss;
+
+            if (e.type & 0x20)
+              sprite = SFG_getMonsterSprite(e.type,0,0);
+            else
+              SFG_getItemSprite(e.type,&sprite,&ss);
+             
+            break;
+          } 
+        }
+
+        drawColum(
+          CENTER_X + startX + drawX * TW,
+          CENTER_Y + (2 * drawY + i) * TH - drawY,-1 * h,
+          0,SFG_TILE_FLOOR_TEXTURE(tile),
+          (properties == SFG_TILE_PROPERTY_DOOR) ?
+          SFG_currentLevel.levelPointer->doorTextureIndex : -1,
+          sprite);
+
+       int maxH = 16 * TILE_H;
+
+       if (maxHeightTiles * TILE_H < maxH)
+         maxH = maxHeightTiles * TILE_H;
+
+       maxH *= -1;
+
+       h = SFG_TILE_FLOOR_HEIGHT(tile) + SFG_TILE_CEILING_HEIGHT(tile);
+       h = -1 * (h * SFG_WALL_HEIGHT_STEP * TILE_H) / RCL_UNITS_PER_SQUARE + 1;
+
+       if (SFG_TILE_CEILING_HEIGHT(tile) < 31 &&
+         maxH < h && properties != SFG_TILE_PROPERTY_ELEVATOR)
+       {
+         drawColum(
+           CENTER_X + startX + drawX * TW,
+           CENTER_Y + (2 * drawY + i) * TH - drawY,maxH,
+           h,SFG_TILE_CEILING_TEXTURE(tile),-1,0);
+       }
+
+       n++;
+      }
+    }
+  }
+
+  fwrite(image,1,IMAGE_W * IMAGE_H * 3,f);
+
+  fclose(f);
+}
+
+int main(void)
+{
+  SFG_init();
+
+#define E(m,h1,h2,h3,h4)\
+  printf("exporting %d\n",m);\
+  maxHeights[0] = h1;\
+  maxHeights[1] = h2;\
+  maxHeights[2] = h3;\
+  maxHeights[3] = h4;\
+  exportMap(m);
+
+  E(0,100,100,100,100)
+  E(1,7,5,7,5)
+  E(2,5,6,5,5)
+  E(3,7,7,6,6)
+  E(4,100,6,100,6)
+  E(5,100,100,100,100)
+  E(6,5,4,3,3)
+  E(7,7,7,7,7)
+  E(8,5,5,5,5)
+  E(9,100,100,100,100)
+
+  return 0;
+}
+
+// just create empty functions, game.h requires it:
+int8_t SFG_keyPressed(uint8_t key) { return 0; }
+void SFG_getMouseOffset(int16_t *x, int16_t *y) { }
+uint32_t SFG_getTimeMs() { return 0; }
+void SFG_sleepMs(uint16_t timeMs) { }
+static inline void SFG_setPixel(uint16_t x, uint16_t y, uint8_t colorIndex) { }
+void SFG_playSound(uint8_t soundIndex, uint8_t volume) { }
+void SFG_setMusic(uint8_t value) { }
+void SFG_processEvent(uint8_t event, uint8_t data) { }
+void SFG_save(uint8_t data[SFG_SAVE_SIZE]) { }
+uint8_t SFG_load(uint8_t data[SFG_SAVE_SIZE]) { return 0; }