git.y1.nz

commit a54a099a56139b289e28c8a3779887b28f612305
parent 7d0e3891836c50fc551341fba38d2ab1ca96756e
Author: Toxa <untoxa@mail.ru>
Date:   Tue, 29 Jul 2025 17:48:51 +0300

PNG2ASSET: export binary palettes when -bin

Diffstat:
M
gbdk-support/png2asset/export_binary.cpp
39
++++++++++++++++++++++++++++++++++++++-
M
gbdk-support/png2asset/process_arguments.cpp
1
+
M
gbdk-support/png2asset/process_arguments.h
1
+

3 files changed, 40 insertions(+), 1 deletion(-)
diff --git a/gbdk-support/png2asset/export_binary.cpp b/gbdk-support/png2asset/export_binary.cpp
@@ -34,7 +34,7 @@ static exportOptions_t exportOpt;
 
 static void export_map_binary_tile_data(PNG2AssetData* assetData);
 static void export_map_binary_map_data(PNG2AssetData* assetData);
-
+static void export_map_binary_palette_data(PNG2AssetData* assetData);
 
 bool export_map_binary(PNG2AssetData* assetData) {
 
@@ -46,6 +46,9 @@ bool export_map_binary(PNG2AssetData* assetData) {
     if (assetData->args->includedMapOrMetaspriteData)
         export_map_binary_map_data(assetData);
 
+    if (assetData->args->include_palettes)
+        export_map_binary_palette_data(assetData);
+
     return true; // success
 }
 
@@ -118,3 +121,37 @@ static void export_map_binary_map_data(PNG2AssetData* assetData) {
         mapAttributesBinaryfile.close();
     }
 }
+
+static void export_map_binary_palette_data(PNG2AssetData* assetData) {
+
+    std::ofstream paletteBinaryFile;
+    paletteBinaryFile.open(assetData->args->output_filename_palettes_bin, std::ios_base::binary);
+
+    const size_t palette_start = exportOpt.color_start / assetData->image.colors_per_pal;
+    const size_t total_palette_count = assetData->image.total_color_count / assetData->image.colors_per_pal;
+    int cur_color = exportOpt.color_start;
+
+    for (size_t i = palette_start; i < total_palette_count; ++i)
+    {
+        unsigned char* pal_ptr = &assetData->image.palette[i * (assetData->image.colors_per_pal * RGBA32_SZ)];
+        for (int c = 0; c < (int)assetData->image.colors_per_pal; ++c, pal_ptr += RGBA32_SZ)
+        {
+            if (assetData->args->convert_rgb_to_nes) {
+                size_t rgb222 = (((pal_ptr[2] >> 6) & 0x3) << 4) |
+                                (((pal_ptr[1] >> 6) & 0x3) << 2) |
+                                (((pal_ptr[0] >> 6) & 0x3) << 0);
+                paletteBinaryFile.write((const char *)&rgb_to_nes[rgb222], sizeof(rgb_to_nes[0]));
+            } else {
+                // TODO: implement formats other than RGB555, depending on the pack mode
+                uint16_t rgb555 = (((pal_ptr[2] >> 3) & 0b00011111) << 10) |
+                                  (((pal_ptr[1] >> 3) & 0b00011111) << 5)  |
+                                  (((pal_ptr[0] >> 3) & 0b00011111) << 0);
+                paletteBinaryFile.write((const char *)&rgb555, sizeof(rgb555));
+            }
+
+            cur_color++;
+        }
+    }
+    // Finalize the files
+    paletteBinaryFile.close();
+}
diff --git a/gbdk-support/png2asset/process_arguments.cpp b/gbdk-support/png2asset/process_arguments.cpp
@@ -339,6 +339,7 @@ int processPNG2AssetArguments(int argc, char* argv[], PNG2AssetArguments* args) 
     args->output_filename_bin = args->output_filename.substr(0, dot_pos) + "_map.bin";
     args->output_filename_attributes_bin = args->output_filename.substr(0, dot_pos) + "_map_attributes.bin";
     args->output_filename_tiles_bin = args->output_filename.substr(0, dot_pos) + "_tiles.bin";
+    args->output_filename_palettes_bin = args->output_filename.substr(0, dot_pos) + "_palettes.bin";
     args->data_name = args->output_filename.substr(slash_pos + 1, dot_pos - 1 - slash_pos);
     replace(args->data_name.begin(), args->data_name.end(), '-', '_');
 
diff --git a/gbdk-support/png2asset/process_arguments.h b/gbdk-support/png2asset/process_arguments.h
@@ -30,6 +30,7 @@ struct PNG2AssetArguments {
     string output_filename_bin;
     string output_filename_attributes_bin;
     string output_filename_tiles_bin;
+    string output_filename_palettes_bin;
     string data_name;
     string output_filename;
     string input_filename;

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