Added tileset loading.

src/dawntools/display/CMakeLists.txt

@@ -4,6 +4,7 @@
 # https://opensource.org/licenses/MIT
 
 add_subdirectory(texturegen)
+add_subdirectory(tilesetgen)
 add_subdirectory(truetypegen)
 
 # Texture Tool
@@ -15,6 +16,16 @@ function(tool_texture target in)
   )
 endfunction()
 
+# Tileset Tool
+function(tool_tileset targetTileset targetTexture in cols rows)
+  tool_texture(${targetTexture} ${in})
+  add_custom_target(${targetTileset}
+    COMMAND tilesetgen "${DAWN_ASSETS_SOURCE_DIR}/${in}" "${DAWN_ASSETS_BUILD_DIR}/${targetTileset}" "${cols}" "${rows}"
+    COMMENT "Generating tileset ${target} from ${in}"
+    DEPENDS tilesetgen ${targetTexture}
+  )
+endfunction()
+
 # TrueType Tool
 function(tool_truetype target in out width height fontSize)
   add_custom_target(${target}

src/dawntools/display/tilesetgen/CMakeLists.txt

@@ -0,0 +1,24 @@
+# Copyright (c) 2021 Dominic Msters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Texture Build Tool
+project(tilesetgen VERSION 1.0)
+add_executable(tilesetgen)
+target_sources(tilesetgen
+  PRIVATE
+    main.c
+    ../../utils/file.c
+    ../../utils/image.c
+)
+target_include_directories(tilesetgen
+  PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/../../
+    ${CMAKE_CURRENT_LIST_DIR}
+)
+target_link_libraries(tilesetgen
+  PUBLIC
+    ${DAWN_BUILD_HOST_LIBS}
+    stb
+)

src/dawntools/display/tilesetgen/main.c

@@ -0,0 +1,153 @@
+/**
+ * Copyright (c) 2022 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "../../utils/common.h"
+#include "../../utils/file.h"
+#include "../../utils/image.h"
+
+int main(int argc, char *argv[]) {
+  char *in;
+  char *out;
+  FILE *file;
+  char path[FILENAME_MAX + 1];
+  int w, h, channels, cols, rows;
+  stbi_uc *dataImageRaw;
+  int gapX, gapY, borderX, borderY;
+
+  if(argc < 5) {
+    printf("Invalid number of arguments");
+    return 1;
+  }
+
+  in = argv[1];
+  out = argv[2];
+  gapX = 0, gapY = 0, borderX = 0, borderY = 0;
+
+  cols = atoi(argv[3]);
+  if(cols <= 0) {
+    printf("Columns is invalid\n");
+    return 1;
+  }
+
+  rows = atoi(argv[4]);
+  if(rows <= 0) {
+    printf("Rows is invalid");
+    return 1;
+  }
+
+  if(argc >= 6) {
+    gapX = atoi(argv[5]);
+    if(gapX <= 0) {
+      printf("Gap X is invalid\n");
+      return 1;
+    }
+  }
+
+  if(argc >= 7) {
+    gapY = atoi(argv[6]);
+    if(gapY <= 0) {
+      printf("Gap Y is invalid\n");
+      return 1;
+    }
+  }
+
+  if(argc >= 8) {
+    borderX = atoi(argv[7]);
+    if(borderX <= 0) {
+      printf("Border X is invalid\n");
+      return 1;
+    }
+  }
+
+  if(argc >= 9) {
+    borderY = atoi(argv[8]);
+    if(borderY <= 0) {
+      printf("Border Y is invalid\n");
+      return 1;
+    }
+  }
+
+  // Normalize slashes
+  fileNormalizeSlashes(in);
+  fileNormalizeSlashes(out);
+
+  // Check the output doesn't already exist
+  sprintf(path, "%s.tileset", out);
+  file = fopen(path, "rb");
+  if(file != NULL) {
+    fclose(file);
+    return 0;
+  }
+
+  // Read in the original texture
+  file = fopen(in, "rb");
+  if(file == NULL) {
+    printf("Failed to open file!\n");
+    return 1;
+  }
+  
+  // Read image data
+  dataImageRaw = stbi_load_from_file(file, &w, &h, &channels, STBI_rgb_alpha);
+  if(dataImageRaw == NULL) {
+    printf("Failed to load input texture!\n");
+    return 1;
+  }
+  fclose(file);
+  free(dataImageRaw);
+
+  if(w <= 0 || h <= 0) {
+    printf("Reading image failed (corrupted?)\n");
+    return 1;
+  }
+
+  // Calculate division sizes (pixels)
+  float divX = (
+    (float)w - ((float)borderX * 2.0f) -
+    ((float)gapX * ((float)cols - 1))
+  ) / cols;
+  float divY = (
+    (float)h - ((float)borderY * 2.0f) -
+    ((float)gapY * ((float)rows - 1))
+  ) / rows;
+
+  // Calculate the division sizes (units)
+  float tdivX = divX / (float)w;
+  float tdivY = divY / (float)h;
+
+  // Output buffer prep
+  char *buffer = malloc(sizeof(char) * (cols * rows * 48 + 48 + 48));
+  buffer[0] = '\0';
+
+  sprintf(buffer, "%i|%i|", cols, rows);
+
+  // Now prep tileset.
+  for(int y = 0; y < rows; y++) {
+    for(int x = 0; x < cols; x++) {
+      float ux0 = (borderX + (divX * x) + (gapX * x)) / w;
+      float ux1 = ux0 + tdivX;
+      float uy0 = (borderY + (divY * y) + (gapY * y)) / h;
+      float uy1 = uy0 + tdivY;
+      sprintf(buffer, "%s%f,%f,%f,%f|", buffer, ux0, ux1, uy0, uy1);
+    }
+  }
+
+  // Open output file
+  fileMkdirp(path);
+  file = fopen(path, "wb");
+  if(file == NULL) {
+    free(buffer);
+    printf("Invalid tileset file out!\n");
+    return 1;
+  }
+
+  // Write and close
+  fwrite(buffer, sizeof(char), strlen(buffer), file);
+  fclose(file);
+  free(buffer);
+
+  return 0;
+}