From c3c713345e3cf7bfafba40a650cde2f79369c079 Mon Sep 17 00:00:00 2001
From: BlueCube3310 <53150244+BlueCube3310@users.noreply.github.com>
Date: Thu, 4 Sep 2025 16:45:28 +0200
Subject: [PATCH] Image: Support resizing all uncompressed formats
---
core/io/image.cpp | 18 +++++++++++++++---
doc/classes/Image.xml | 1 +
2 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/core/io/image.cpp b/core/io/image.cpp
index 47e7342e48a..be19f99491e 100644
--- a/core/io/image.cpp
+++ b/core/io/image.cpp
@@ -1255,9 +1255,6 @@ void Image::resize_to_po2(bool p_square, Interpolation p_interpolation) {
void Image::resize(int p_width, int p_height, Interpolation p_interpolation) {
ERR_FAIL_COND_MSG(data.is_empty(), "Cannot resize image before creating it, use set_data() first.");
ERR_FAIL_COND_MSG(is_compressed(), "Cannot resize in compressed image formats.");
-
- bool mipmap_aware = p_interpolation == INTERPOLATE_TRILINEAR /* || p_interpolation == INTERPOLATE_TRICUBIC */;
-
ERR_FAIL_COND_MSG(p_width <= 0, "Image width must be greater than 0.");
ERR_FAIL_COND_MSG(p_height <= 0, "Image height must be greater than 0.");
ERR_FAIL_COND_MSG(p_width > MAX_WIDTH, vformat("Image width cannot be greater than %d pixels.", MAX_WIDTH));
@@ -1268,9 +1265,19 @@ void Image::resize(int p_width, int p_height, Interpolation p_interpolation) {
return;
}
+ // Convert the image to 'standard' RGB(A) formats that may be resized.
+ Format original_format = format;
+ if (original_format == FORMAT_RGB565 || original_format == FORMAT_RGBA4444) {
+ convert(FORMAT_RGBA8);
+ } else if (original_format == FORMAT_RGBE9995) {
+ convert(FORMAT_RGBH);
+ }
+
Image dst(p_width, p_height, false, format);
// Setup mipmap-aware scaling
+ bool mipmap_aware = p_interpolation == INTERPOLATE_TRILINEAR /* || p_interpolation == INTERPOLATE_TRICUBIC */;
+
Image dst2;
int mip1 = 0;
int mip2 = 0;
@@ -1614,6 +1621,11 @@ void Image::resize(int p_width, int p_height, Interpolation p_interpolation) {
}
_copy_internals_from(dst);
+
+ // Reconvert the image to its original format.
+ if (original_format != format) {
+ convert(original_format);
+ }
}
void Image::crop_from_point(int p_x, int p_y, int p_width, int p_height) {
diff --git a/doc/classes/Image.xml b/doc/classes/Image.xml
index 23ee287f360..0eeef7de251 100644
--- a/doc/classes/Image.xml
+++ b/doc/classes/Image.xml
@@ -446,6 +446,7 @@
Resizes the image to the given [param width] and [param height]. New pixels are calculated using the [param interpolation] mode defined via [enum Interpolation] constants.
+ [b]Note:[/b] If the image's format is [constant FORMAT_RGBA4444], [constant FORMAT_RGB565], or [constant FORMAT_RGBE9995], it will be temporarily converted to either [constant FORMAT_RGBA8] or [constant FORMAT_RGBAH]. This can affect the quality of the resized image.