From 9aa09c55b0af4b8c4c14a4ac50fcb21f7eba492d Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Mon, 10 Apr 2023 18:36:53 +0100
Subject: Support loading textures from an in memory buffer

---
 gfx/image.cpp | 16 ++++++++++++++++
 gfx/image.h   |  1 +
 2 files changed, 17 insertions(+)

diff --git a/gfx/image.cpp b/gfx/image.cpp
index e3e3b01..fb86cb6 100644
--- a/gfx/image.cpp
+++ b/gfx/image.cpp
@@ -19,6 +19,22 @@ Image::Image(const char * fileName, int flags) : width {}, height {}, numCompone
 	data = {bytes, static_cast<size_t>(width * height * numComponents)};
 }
 
+Image::Image(std::span<unsigned char> buffer, int flags)
+{
+	stbi_set_flip_vertically_on_load(1);
+	int w, h, nc;
+	unsigned char * bytes = stbi_load_from_memory(buffer.data(), static_cast<int>(buffer.size()), &w, &h, &nc, flags);
+	width = static_cast<unsigned int>(w);
+	height = static_cast<unsigned int>(h);
+	numComponents = static_cast<unsigned int>(nc);
+
+	if (!bytes) {
+		throw std::runtime_error {"Unable to load image from memory buffer "};
+	}
+
+	data = {bytes, static_cast<size_t>(width * height * numComponents)};
+}
+
 Image::~Image()
 {
 	stbi_image_free(data.data());
diff --git a/gfx/image.h b/gfx/image.h
index 47437ca..97c2731 100644
--- a/gfx/image.h
+++ b/gfx/image.h
@@ -8,6 +8,7 @@ class Image {
 public:
 	Image(const char * fileName, int flags);
 	Image(const std::string & fileName, int flags) : Image(fileName.c_str(), flags) { }
+	Image(std::span<unsigned char> data, int flags);
 	~Image();
 
 	NO_COPY(Image);
-- 
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