mirror of
https://github.com/MaSzyna-EU07/maszyna.git
synced 2026-10-26 21:44:53 +01:00
108 lines
3.4 KiB
C++
108 lines
3.4 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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// how the application makes the windows of the opengl 4.6 renderer: a core profile context of the main window, which the
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// windows made later share, and the gl functions loaded through it
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#include "stdafx.h"
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#include "rendering/opengl46/opengl46renderer.h"
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#include "utilities/Globals.h"
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#include "utilities/Logs.h"
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namespace
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{
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// the context of the required version couldn't be created. a context with default settings tells which version the
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// driver does provide, so the user can be told what is missing
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std::string describe_gl_driver()
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{
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glfwDefaultWindowHints();
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glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
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auto *probe = glfwCreateWindow(64, 64, "eu07 opengl probe", nullptr, nullptr);
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if (probe == nullptr)
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return "no OpenGL context";
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glfwMakeContextCurrent(probe);
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std::string description;
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auto const getstring = reinterpret_cast<PFNGLGETSTRINGPROC>(glfwGetProcAddress("glGetString"));
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if (getstring != nullptr)
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{
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auto const text = [&](GLenum const Name) {
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auto const *value = reinterpret_cast<char const *>(getstring(Name));
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return std::string(value != nullptr ? value : "?");
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};
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description = "OpenGL " + text(GL_VERSION) + ", " + text(GL_RENDERER) + " (" + text(GL_VENDOR) + ")";
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}
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glfwMakeContextCurrent(nullptr);
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glfwDestroyWindow(probe);
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return description.empty() ? "unknown OpenGL version" : description;
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}
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void window_hints()
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{
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if (Global.gfx_skippipeline && Global.iMultisampling > 0)
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{
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glfwWindowHint(GLFW_SAMPLES, 1 << Global.iMultisampling);
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}
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// activate core profile for opengl 4.6 renderer
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glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_API);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GLFW_TRUE);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
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if (Global.gfx_gldebug)
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glfwWindowHint(GLFW_OPENGL_DEBUG_CONTEXT, GLFW_TRUE);
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glfwWindowHint(GLFW_SRGB_CAPABLE, !Global.gfx_shadergamma);
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}
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bool after_window(GLFWwindow *Window)
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{
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glfwMakeContextCurrent(Window);
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glfwSwapInterval(Global.VSync ? 1 : 0); // vsync
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if (!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
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{
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ErrorLog("Bad init: failed to initialize glad");
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return false;
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}
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return true;
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}
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void window_failed(std::string const &Reason)
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{
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auto const driver = describe_gl_driver();
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ErrorLog("Bad init: failed to create OpenGL 4.6 core profile context (" + Reason + "); the graphics card/driver provides: " + driver);
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#ifdef _WIN32
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auto const message = "MaSzyna requires OpenGL 4.6 (core profile), but the OpenGL 4.6 context could not be created.\n\n"
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"Your graphics card/driver provides:\n" + driver + "\n\n"
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"Details: " + Reason + "\n\n"
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"Update the graphics driver or use a graphics card with OpenGL 4.6 support.";
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MessageBoxA(nullptr, message.c_str(), "MaSzyna", MB_ICONERROR | MB_OK);
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#endif
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}
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} // namespace
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gfx_backend_desc opengl46_renderer::backend_desc()
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{
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gfx_backend_desc desc;
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desc.name = "opengl 4.6";
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desc.create = &opengl46_renderer::create_func;
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desc.window_hints = &window_hints;
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desc.after_window = &after_window;
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desc.window_failed = &window_failed;
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desc.gl_context = true;
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return desc;
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}
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