From ae426f7f17c9855aa12cad149dfd54f7c8c0239e Mon Sep 17 00:00:00 2001
From: antopilo <antoinepilote1@hotmail.com>
Date: Mon, 16 Sep 2024 08:57:52 -0400
Subject: [PATCH] Added support for SVG images inUI + added a texture flag to
 flip on load

---
 Nuake/src/Rendering/Textures/Texture.cpp | 32 ++++++++++-
 Nuake/src/Rendering/Textures/Texture.h   |  3 +
 Nuake/src/UI/Nodes/Node.cpp              | 72 +++++++++++++-----------
 3 files changed, 74 insertions(+), 33 deletions(-)

diff --git a/Nuake/src/Rendering/Textures/Texture.cpp b/Nuake/src/Rendering/Textures/Texture.cpp
index 15c5468d..ee60db60 100644
--- a/Nuake/src/Rendering/Textures/Texture.cpp
+++ b/Nuake/src/Rendering/Textures/Texture.cpp
@@ -48,9 +48,34 @@ namespace Nuake
 		m_Width = size.x;
 		m_Height = size.y;
 
+		void* tempData = data;
+		if (flags.flipVertical)
+		{
+			int row;
+			size_t bytes_per_row = (size_t)m_Width * 4;
+			stbi_uc temp[2048];
+			stbi_uc* bytes = (stbi_uc*)tempData;
+
+			for (row = 0; row < ((int)m_Width >> 1); row++) {
+				stbi_uc* row0 = bytes + row * bytes_per_row;
+				stbi_uc* row1 = bytes + ((int)m_Width - row - 1) * bytes_per_row;
+				// swap row0 with row1
+				size_t bytes_left = bytes_per_row;
+				while (bytes_left) {
+					size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
+					memcpy(temp, row0, bytes_copy);
+					memcpy(row0, row1, bytes_copy);
+					memcpy(row1, temp, bytes_copy);
+					row0 += bytes_copy;
+					row1 += bytes_copy;
+					bytes_left -= bytes_copy;
+				}
+			}
+		}
+
 		glGenTextures(1, &m_RendererId);
 		glBindTexture(GL_TEXTURE_2D, m_RendererId);
-		glTexImage2D(GL_TEXTURE_2D, 0, (GLenum)flags.pixelFormat, size.x, size.y, 0, (GLenum)flags.pixelFormat, (GLenum)flags.pixelDataType, data);
+		glTexImage2D(GL_TEXTURE_2D, 0, (GLenum)flags.pixelFormat, size.x, size.y, 0, (GLenum)flags.pixelFormat, (GLenum)flags.pixelDataType, tempData);
 		
 		SetMagnificationFilter(flags.magFilter);
 		SetMinificationFilter(flags.minFilter);
@@ -188,4 +213,9 @@ namespace Nuake
 
 		return true;
 	}
+
+	void Texture::FlipOnLoad()
+	{
+
+	}
 }
diff --git a/Nuake/src/Rendering/Textures/Texture.h b/Nuake/src/Rendering/Textures/Texture.h
index e69ae2f7..a840a225 100644
--- a/Nuake/src/Rendering/Textures/Texture.h
+++ b/Nuake/src/Rendering/Textures/Texture.h
@@ -89,5 +89,8 @@ namespace Nuake
 
 		json Serialize() override;
 		bool Deserialize(const json& j) override;
+
+	private:
+		void FlipOnLoad();
 	};
 }
diff --git a/Nuake/src/UI/Nodes/Node.cpp b/Nuake/src/UI/Nodes/Node.cpp
index cb32fde4..3164d8e9 100644
--- a/Nuake/src/UI/Nodes/Node.cpp
+++ b/Nuake/src/UI/Nodes/Node.cpp
@@ -1,4 +1,5 @@
 #include "Node.h"
+#include "src/Core/String.h"
 #include "../Renderer.h"
 #include "src/FileSystem/FileSystem.h"
 
@@ -6,6 +7,8 @@
 #include "../StringHelper.h"
 #include "src/UI/Nodes/Canvas.h"
 
+#define NANOSVGRAST_IMPLEMENTATION
+#define NANOSVG_IMPLEMENTATION
 #include <nanosvg.h>
 #include <nanosvgrast.h>
 #include <src/UI/Font/FontManager.h>
@@ -477,47 +480,52 @@ namespace NuakeUI
 					ComputedStyle.ZIndex = value.value.Number;
 					break;
 				case StyleProperties::Font:
-					if (FileSystem::FileExists(value.string, true))
+				{
+					bool fileExists = FileSystem::FileExists(Nuake::String::ReplaceSlash(value.string), true);
+					if (fileExists)
 					{
 						ComputedStyle.FontFamily = FontManager::Get().GetFont(value.string);
 					}
-					break;
+				}
+				break;
 				case StyleProperties::BackgroundImage:
 					{
 						if (ComputedStyle.BackgroundImage == nullptr)
 						{
 							if (StringHelper::EndsWith(value.string, ".svg"))
 							{
-								//NSVGimage* image = NULL;
-								//NSVGrasterizer* rast = NULL;
-								//unsigned char* img = NULL;
-								//
-								//int w, h;
-								//image = nsvgParseFromFile(value.string.c_str(), "px", 96.0f);
-								//if (image == NULL) {
-								//	printf("Could not open SVG image.\n");
-								//
-								//}
-								//w = (int)image->width;
-								//h = (int)image->height;
-								//
-								//rast = nsvgCreateRasterizer();
-								//if (rast == NULL) {
-								//	printf("Could not init rasterizer.\n");
-								//}
-								//
-								//img = (unsigned char*)malloc(w * h * 4);
-								//if (img == NULL) {
-								//	printf("Could not alloc image buffer.\n");
-								//}
-								//
-								//nsvgRasterize(rast, image, 0, 0, 1, img, w, h, w * 4);
-								//
-								//auto texture = std::make_shared<Texture>(img, w * h * 4);
-								//ComputedStyle.BackgroundImage = texture;
-								//
-								//nsvgDeleteRasterizer(rast);
-								//nsvgDelete(image);
+								NSVGimage* image = NULL;
+								NSVGrasterizer* rast = NULL;
+								unsigned char* img = NULL;
+								
+								int w, h;
+								image = nsvgParseFromFile(value.string.c_str(), "px", 96.0f);
+								if (image == NULL) {
+									printf("Could not open SVG image.\n");
+								
+								}
+								w = (int)image->width;
+								h = (int)image->height;
+								
+								rast = nsvgCreateRasterizer();
+								if (rast == NULL) {
+									printf("Could not init rasterizer.\n");
+								}
+								
+								img = (unsigned char*)malloc(w * h * 4);
+								if (img == NULL) {
+									printf("Could not alloc image buffer.\n");
+								}
+								
+								nsvgRasterize(rast, image, 0, 0, 1, img, w, h, w * 4);
+								
+								TextureFlags flags;
+								flags.flipVertical = true;
+								auto texture = std::make_shared<Texture>(flags, Vector2{ w, h }, img);
+								ComputedStyle.BackgroundImage = texture;
+								
+								nsvgDeleteRasterizer(rast);
+								nsvgDelete(image);
 							}
 							else
 							{