From 2491fd4ccf6070848c515aab35170c4013b5a23e Mon Sep 17 00:00:00 2001
From: kdx <kikoodx@paranoici.org>
Date: Sun, 16 Jul 2023 03:48:01 +0200
Subject: image loading

---
 demo.cpp           |   2 +-
 res/smile.bmp      | Bin 0 -> 12426 bytes
 src/FLD.hpp        |   6 +++++-
 src/destructor.cpp |   3 +++
 src/image.cpp      |  42 ++++++++++++++++++++++++++++++++++++++++--
 src/sdlError.cpp   |   4 ++--
 6 files changed, 51 insertions(+), 6 deletions(-)
 create mode 100644 res/smile.bmp

diff --git a/demo.cpp b/demo.cpp
index 536d055..f335402 100644
--- a/demo.cpp
+++ b/demo.cpp
@@ -12,7 +12,7 @@ main_loop(FLD& fld, [[maybe_unused]] void *udata)
 	fld.drawSetColor(FLD::WHITE);
 	fld.drawRectangle({ 16, 32, 64, 32 });
 
-	fld.image("coucou.png").draw({
+	fld.image("res/smile.bmp").draw({
 		.p = {},
 		.sx = 1.5f,
 		.sy = 0.5f,
diff --git a/res/smile.bmp b/res/smile.bmp
new file mode 100644
index 0000000..733a0a3
Binary files /dev/null and b/res/smile.bmp differ
diff --git a/src/FLD.hpp b/src/FLD.hpp
index 5cfd0cb..9abe34a 100644
--- a/src/FLD.hpp
+++ b/src/FLD.hpp
@@ -49,6 +49,10 @@ public:
 	};
 	struct Image {
 		bool valid = true;
+		SDL_Texture *ptr = nullptr;
+		int width = 0;
+		int height = 0;
+
 		Error invalid() const;
 		Error draw(const DrawImageOpts& opts) const;
 	};
@@ -107,7 +111,7 @@ private:
 	} transform;
 	std::map<const std::string, Image> images = {};
 
-	Error sdlError() const;
+	Error sdlError(const std::string& msg="") const;
 	[[nodiscard]] Error initBasepath() const;
 	[[nodiscard]] Error initWindow();
 	[[nodiscard]] Error initRenderer();
diff --git a/src/destructor.cpp b/src/destructor.cpp
index 7f1c906..1adcb65 100644
--- a/src/destructor.cpp
+++ b/src/destructor.cpp
@@ -3,6 +3,9 @@
 
 FLD::~FLD()
 {
+	for (auto [_, e] : images)
+		if (e.ptr != nullptr)
+			SDL_DestroyTexture(e.ptr);
 	if (_target != nullptr) {
 		SDL_DestroyTexture(_target);
 		_target = nullptr;
diff --git a/src/image.cpp b/src/image.cpp
index ec0b37d..f9fb1e2 100644
--- a/src/image.cpp
+++ b/src/image.cpp
@@ -1,11 +1,49 @@
 #include "FLD.hpp"
 
+static FLD::Image&
+invalid_image()
+{
+	static FLD::Image image = { .valid = false };
+	return image;
+}
+
 FLD::Image&
 FLD::image(const std::string &path)
 {
 	if (images.contains(path))
 		return images[path];
 
-	static Image invalid_image = { .valid = false };
-	return invalid_image;
+	const auto surf = SDL_LoadBMP(path.c_str());
+	if (surf == nullptr) {
+		sdlError(path);
+		return invalid_image();
+	}
+
+	const auto tex = SDL_CreateTextureFromSurface(_renderer, surf);
+	SDL_FreeSurface(surf);
+	if (tex == nullptr) {
+		sdlError(path);
+		return invalid_image();
+	}
+
+	if (SDL_SetTextureBlendMode(tex, SDL_BLENDMODE_BLEND) < 0) {
+		SDL_DestroyTexture(tex);
+		sdlError(path);
+		return invalid_image();
+	}
+
+	int width, height;
+	if (SDL_QueryTexture(tex, nullptr, nullptr, &width, &height) < 0) {
+		SDL_DestroyTexture(tex);
+		sdlError(path);
+		return invalid_image();
+	}
+
+	images[path] = {
+		.ptr = tex,
+		.width = width,
+		.height = height
+	};
+
+	return images[path];
 }
diff --git a/src/sdlError.cpp b/src/sdlError.cpp
index e77edcc..6d06b0a 100644
--- a/src/sdlError.cpp
+++ b/src/sdlError.cpp
@@ -2,8 +2,8 @@
 #include <SDL2/SDL_log.h>
 
 FLD::Error
-FLD::sdlError() const
+FLD::sdlError(const std::string& msg) const
 {
-	SDL_Log("SDL runtime error: %s", SDL_GetError());
+	SDL_Log("SDL runtime error (%s): %s", msg.c_str(), SDL_GetError());
 	return -1;
 }
-- 
cgit v1.2.3