[nostalgia/core] Get building with GLFW (it has a better Conan package than SDL)

src/nostalgia/core/glfw/gfx.cpp

@@ -0,0 +1,74 @@
+/*
+ * Copyright 2016 - 2021 gary@drinkingtea.net
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <array>
+
+#include <GLFW/glfw3.h>
+
+#include <ox/claw/read.hpp>
+
+#include <nostalgia/core/gfx.hpp>
+#include <nostalgia/core/userland/gfx.hpp>
+
+#include "core.hpp"
+
+namespace nostalgia::core {
+
+constexpr auto Scale = 5;
+
+static void handleGlfwError(int err, const char *desc) {
+    oxErrf("GLFW error ({}): {}", err, desc);
+}
+
+ox::Error initGfx(Context *ctx) noexcept {
+	auto id = ctx->windowerData<GlfwImplData>();
+	glfwSetErrorCallback(handleGlfwError);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+	glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
+	glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);
+	id->window = glfwCreateWindow(240 * Scale, 160 * Scale, "nostalgia", nullptr, nullptr);
+	if (id->window == nullptr) {
+		return OxError(1, "Could not open GLFW window");
+	}
+	glfwSetWindowUserPointer(id->window, ctx);
+	glfwMakeContextCurrent(id->window);
+	oxReturnError(renderer::init(ctx));
+	return OxError(0);
+}
+
+ox::Error shutdownGfx(Context *ctx) noexcept {
+	oxReturnError(renderer::shutdown(ctx));
+	auto id = ctx->windowerData<GlfwImplData>();
+	glfwDestroyWindow(id->window);
+	ctx->setWindowerData(nullptr);
+	delete id;
+	return OxError(0);
+}
+
+int getScreenWidth(Context *ctx) noexcept {
+	auto id = ctx->windowerData<GlfwImplData>();
+	int w = 0, h = 0;
+	glfwGetFramebufferSize(id->window, &w, &h);
+	return w;
+}
+
+int getScreenHeight(Context *ctx) noexcept {
+	auto id = ctx->windowerData<GlfwImplData>();
+	int w = 0, h = 0;
+	glfwGetFramebufferSize(id->window, &w, &h);
+	return h;
+}
+
+common::Size getScreenSize(Context *ctx) noexcept {
+	auto id = ctx->windowerData<GlfwImplData>();
+	int w = 0, h = 0;
+	glfwGetFramebufferSize(id->window, &w, &h);
+	return {w, h};
+}
+
+}