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new 452ae235c graphics/jpgresizetool: Add libjpeg resize tool
452ae235c is described below
commit 452ae235c6599d8a5eefc966feef7a156d6d256b
Author: Kevin Witteveen (MartiniMarter) <[email protected]>
AuthorDate: Fri Jul 25 20:11:54 2025 +0200
graphics/jpgresizetool: Add libjpeg resize tool
Add a libjpeg based JPEG resize tool.
Simple resizer that can resize JPEGs using
"jpgresize input.jpg output.jpg scale_denom(1,2,4,8) quality%".
Tries to use little memory by scanning per line.
Signed-off-by: Kevin Witteveen (MartiniMarter) <[email protected]>
---
graphics/jpgresizetool/CMakeLists.txt | 33 ++++++
graphics/jpgresizetool/Kconfig | 11 ++
graphics/jpgresizetool/Make.defs | 25 +++++
graphics/jpgresizetool/Makefile | 34 ++++++
graphics/jpgresizetool/resize.c | 200 ++++++++++++++++++++++++++++++++++
5 files changed, 303 insertions(+)
diff --git a/graphics/jpgresizetool/CMakeLists.txt
b/graphics/jpgresizetool/CMakeLists.txt
new file mode 100644
index 000000000..3afa2ce75
--- /dev/null
+++ b/graphics/jpgresizetool/CMakeLists.txt
@@ -0,0 +1,33 @@
+#
##############################################################################
+# apps/graphics/jpgresizetool/CMakeLists.txt
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
contributor
+# license agreements. See the NOTICE file distributed with this work for
+# additional information regarding copyright ownership. The ASF licenses this
+# file to you under the Apache License, Version 2.0 (the "License"); you may
not
+# use this file except in compliance with the License. You may obtain a copy
of
+# the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations under
+# the License.
+#
+#
##############################################################################
+
+if(CONFIG_GRAPHICS_JPGRESIZETOOL)
+ nuttx_add_application(
+ NAME
+ jpgresize
+ STACKSIZE
+ 4096
+ MODULE
+ ${CONFIG_GRAPHICS_JPGRESIZETOOL}
+ SRCS
+ resize.c)
+endif()
diff --git a/graphics/jpgresizetool/Kconfig b/graphics/jpgresizetool/Kconfig
new file mode 100644
index 000000000..a1ff56f5d
--- /dev/null
+++ b/graphics/jpgresizetool/Kconfig
@@ -0,0 +1,11 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config GRAPHICS_JPGRESIZETOOL
+ bool "JPGResizeTool"
+ default n
+ depends on libjpeg
+ ---help---
+ Libjpeg JPEG resizer
diff --git a/graphics/jpgresizetool/Make.defs b/graphics/jpgresizetool/Make.defs
new file mode 100644
index 000000000..1409a3ffb
--- /dev/null
+++ b/graphics/jpgresizetool/Make.defs
@@ -0,0 +1,25 @@
+############################################################################
+# apps/graphics/jpgresizetool/Make.defs
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ifneq ($(CONFIG_GRAPHICS_JPGRESIZETOOL),)
+CONFIGURED_APPS += $(APPDIR)/graphics/jpgresizetool
+endif
diff --git a/graphics/jpgresizetool/Makefile b/graphics/jpgresizetool/Makefile
new file mode 100644
index 000000000..223ad5610
--- /dev/null
+++ b/graphics/jpgresizetool/Makefile
@@ -0,0 +1,34 @@
+############################################################################
+# apps/graphics/jpgresizetool/Makefile
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(APPDIR)/Make.defs
+
+MAINSRC = resize.c
+
+# built-in application info
+
+PROGNAME = jpgresize
+PRIORITY = SCHED_PRIORITY_DEFAULT
+STACKSIZE = 4096
+MODULE = $(CONFIG_GRAPHICS_JPGRESIZETOOL)
+
+include $(APPDIR)/Application.mk
diff --git a/graphics/jpgresizetool/resize.c b/graphics/jpgresizetool/resize.c
new file mode 100644
index 000000000..93caaf7f9
--- /dev/null
+++ b/graphics/jpgresizetool/resize.c
@@ -0,0 +1,200 @@
+/****************************************************************************
+ * apps/graphics/jpgresizetool/resize.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <jpeglib.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/* Every N line, report resizing progress */
+#define JPEGRESIZE_PROGRESS_INTERVAL 40
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/* Usage: jpgresize input.jpg output.jpg scale_denom quality%
+ * scale_denom: 1, 2, 4, 8. Shrinks image by scale_denom times.
+ * quality: 1% to 100%. 20% heavy compression, 80% nearly original.
+ * thumbnail example:
+ * jpgresize /sd/IMAGES/000000a1.jpg /sd/TEMP/THUMBS/000000a1.jpg 8 20
+ */
+
+int main(int argc, char *argv[])
+{
+ struct jpeg_compress_struct cinfo_out;
+ struct jpeg_decompress_struct cinfo;
+ struct jpeg_error_mgr jerr_out;
+ struct jpeg_error_mgr jerr;
+ const char *output_filename;
+ const char *input_filename;
+ uint8_t togglechar;
+ JSAMPARRAY buffer;
+ FILE *outfile;
+ FILE *infile;
+ int scale_denom;
+ int pixel_size;
+ int quality;
+ int height;
+ int width;
+
+ /* Take arguments */
+
+ if (argc != 5)
+ {
+ fprintf(stderr,
+ "Usage: %s input.jpg output.jpg scale_denom(1, 2, 4, 8) quality%%\n",
+ argv[0]);
+ return -1;
+ }
+
+ scale_denom = atoi(argv[3]);
+ if (scale_denom != 1 && scale_denom != 2 && scale_denom != 4 &&
+ scale_denom != 8 && scale_denom != 16)
+ {
+ fprintf(stderr, "scale_denom must be 1, 2, 4 or 8\n");
+ return -1;
+ }
+
+ input_filename = argv[1];
+ output_filename = argv[2];
+ quality = atoi(argv[4]);
+
+ /* Opening input */
+
+ infile = fopen(input_filename, "rb");
+ if (!infile)
+ {
+ perror("fopen input");
+ return -1;
+ }
+
+ /* Configuring decompressor */
+
+ cinfo.err = jpeg_std_error(&jerr);
+ jpeg_create_decompress(&cinfo);
+ jpeg_stdio_src(&cinfo, infile);
+ jpeg_read_header(&cinfo, TRUE);
+
+ cinfo.scale_num = 1;
+ cinfo.scale_denom = scale_denom;
+ jpeg_start_decompress(&cinfo);
+
+ width = cinfo.output_width;
+ height = cinfo.output_height;
+ pixel_size = cinfo.output_components;
+
+ /* Opening output */
+
+ outfile = fopen(output_filename, "wb");
+ if (!outfile)
+ {
+ perror("fopen output");
+ jpeg_destroy_decompress(&cinfo);
+ fclose(infile);
+ return -1;
+ }
+
+ /* Configuring compressor */
+
+ cinfo_out.err = jpeg_std_error(&jerr_out);
+ jpeg_create_compress(&cinfo_out);
+ jpeg_stdio_dest(&cinfo_out, outfile);
+
+ cinfo_out.image_width = width;
+ cinfo_out.image_height = height;
+ cinfo_out.input_components = pixel_size;
+ cinfo_out.in_color_space = cinfo.out_color_space;
+ jpeg_set_defaults(&cinfo_out);
+ jpeg_set_quality(&cinfo_out, quality, TRUE);
+ jpeg_start_compress(&cinfo_out, TRUE);
+
+ /* Allocating memory by using JPEG their own allocator. Do not use malloc */
+
+ printf("Allocating... \r");
+ buffer = (*cinfo.mem->alloc_sarray)
+ ((j_common_ptr)&cinfo, JPOOL_IMAGE, width * pixel_size, 1);
+
+ /* Start the job */
+
+ printf("Resizing... \n");
+ togglechar = 0;
+ while (cinfo.output_scanline < cinfo.output_height)
+ {
+ /* Pretty loading bar... */
+
+ if (cinfo.output_scanline % JPEGRESIZE_PROGRESS_INTERVAL == 1)
+ {
+ printf("\r[%u%%]",
+ (unsigned)(((float)cinfo.output_scanline
+ / cinfo.output_height)
+ * 100));
+ togglechar = !togglechar;
+ }
+
+ if (togglechar)
+ {
+ printf("-");
+ }
+ else
+ {
+ printf("#");
+ }
+
+ fflush(stdout);
+
+ /* Actual work */
+
+ jpeg_read_scanlines(&cinfo, buffer, 1);
+ jpeg_write_scanlines(&cinfo_out, buffer, 1);
+ }
+
+ /* Erase progress bar */
+
+ printf("\r ");
+ for (size_t i = 0; i < JPEGRESIZE_PROGRESS_INTERVAL; i++)
+ {
+ printf(" ");
+ }
+
+ /* All done */
+
+ printf("\rDone\n");
+
+ jpeg_finish_compress(&cinfo_out);
+ jpeg_destroy_compress(&cinfo_out);
+ fclose(outfile);
+
+ jpeg_finish_decompress(&cinfo);
+ jpeg_destroy_decompress(&cinfo);
+ fclose(infile);
+
+ printf("Resized JPEG written to %s\n", output_filename);
+ return 0;
+}
