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-rw-r--r--modules/window-opengl/.nix/derivation.nix37
-rw-r--r--modules/window-opengl/SConscript38
-rw-r--r--modules/window-opengl/SConstruct72
-rw-r--r--modules/window-opengl/gl_backends.h10
-rw-r--r--modules/window-opengl/gl_context.h43
-rw-r--r--modules/window-opengl/gl_window.h8
-rw-r--r--modules/window-opengl/gl_xcb.cpp269
-rw-r--r--modules/window-opengl/gl_xcb.h68
8 files changed, 545 insertions, 0 deletions
diff --git a/modules/window-opengl/.nix/derivation.nix b/modules/window-opengl/.nix/derivation.nix
new file mode 100644
index 0000000..40c25bb
--- /dev/null
+++ b/modules/window-opengl/.nix/derivation.nix
@@ -0,0 +1,37 @@
+{ lib
+, stdenv
+, scons
+, clang-tools
+, version
+, forstio
+, xorg
+, libGL
+}:
+
+let
+
+in stdenv.mkDerivation {
+ pname = "forstio-window-opengl";
+ inherit version;
+ src = ./..;
+
+ enableParallelBuilding = true;
+
+ nativeBuildInputs = [
+ scons
+ clang-tools
+ ];
+
+ buildInputs = [
+ forstio.core
+ forstio.async
+ forstio.io
+ forstio.codec
+ forstio.window
+ xorg.libX11
+ xorg.libxcb
+ libGL
+ ];
+
+ outputs = ["out" "dev"];
+}
diff --git a/modules/window-opengl/SConscript b/modules/window-opengl/SConscript
new file mode 100644
index 0000000..7beee1a
--- /dev/null
+++ b/modules/window-opengl/SConscript
@@ -0,0 +1,38 @@
+#!/bin/false
+
+import os
+import os.path
+import glob
+
+
+Import('env')
+
+dir_path = Dir('.').abspath
+
+# Environment for base library
+window_env = env.Clone();
+
+window_env.sources = sorted(glob.glob(dir_path + "/*.cpp"))
+window_env.headers = sorted(glob.glob(dir_path + "/*.h"))
+
+env.sources += window_env.sources;
+env.headers += window_env.headers;
+
+## Shared lib
+objects_shared = []
+window_env.add_source_files(objects_shared, window_env.sources, shared=True);
+window_env.library_shared = window_env.SharedLibrary('#build/forstio-window-opengl', [objects_shared]);
+
+## Static lib
+objects_static = []
+window_env.add_source_files(objects_static, window_env.sources, shared=False);
+window_env.library_static = window_env.StaticLibrary('#build/forstio-window-opengl', [objects_static]);
+
+# Set Alias
+env.Alias('library_window_opengl', [window_env.library_shared, window_env.library_static]);
+
+env.targets += ['library_window_opengl'];
+
+# Install
+env.Install('$prefix/lib/', [window_env.library_shared, window_env.library_static]);
+env.Install('$prefix/include/forstio/window/opengl/', [window_env.headers]);
diff --git a/modules/window-opengl/SConstruct b/modules/window-opengl/SConstruct
new file mode 100644
index 0000000..fc2c398
--- /dev/null
+++ b/modules/window-opengl/SConstruct
@@ -0,0 +1,72 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import os.path
+import glob
+import re
+
+
+if sys.version_info < (3,):
+ def isbasestring(s):
+ return isinstance(s,basestring)
+else:
+ def isbasestring(s):
+ return isinstance(s, (str,bytes))
+
+def add_kel_source_files(self, sources, filetype, lib_env=None, shared=False, target_post=""):
+
+ if isbasestring(filetype):
+ dir_path = self.Dir('.').abspath
+ filetype = sorted(glob.glob(dir_path+"/"+filetype))
+
+ for path in filetype:
+ target_name = re.sub( r'(.*?)(\.cpp|\.c\+\+)', r'\1' + target_post, path )
+ if shared:
+ target_name+='.os'
+ sources.append( self.SharedObject( target=target_name, source=path ) )
+ else:
+ target_name+='.o'
+ sources.append( self.StaticObject( target=target_name, source=path ) )
+ pass
+
+def isAbsolutePath(key, dirname, env):
+ assert os.path.isabs(dirname), "%r must have absolute path syntax" % (key,)
+
+env_vars = Variables(
+ args=ARGUMENTS
+)
+
+env_vars.Add('prefix',
+ help='Installation target location of build results and headers',
+ default='/usr/local/',
+ validator=isAbsolutePath
+)
+
+env=Environment(ENV=os.environ, variables=env_vars, CPPPATH=[],
+ CPPDEFINES=['SAW_UNIX', 'SAW_UNIX_XCB', 'SAW_OGL'],
+ CXXFLAGS=['-std=c++20','-g','-Wall','-Wextra'],
+ LIBS=[
+ 'forstio-core',
+ 'forstio-io',
+ 'forstio-async',
+ 'forstio-codec'
+ ]
+);
+env.__class__.add_source_files = add_kel_source_files
+env.Tool('compilation_db');
+env.cdb = env.CompilationDatabase('compile_commands.json');
+
+env.objects = [];
+env.sources = [];
+env.headers = [];
+env.targets = [];
+
+Export('env')
+SConscript('SConscript')
+
+env.Alias('cdb', env.cdb);
+env.Alias('all', [env.targets]);
+env.Default('all');
+
+env.Alias('install', '$prefix')
diff --git a/modules/window-opengl/gl_backends.h b/modules/window-opengl/gl_backends.h
new file mode 100644
index 0000000..652954f
--- /dev/null
+++ b/modules/window-opengl/gl_backends.h
@@ -0,0 +1,10 @@
+#pragma once
+
+namespace saw {
+namespace gfx {
+namespace backend {
+struct gl_linux_xcb {};
+struct gl_wasm {};
+}
+}
+}
diff --git a/modules/window-opengl/gl_context.h b/modules/window-opengl/gl_context.h
new file mode 100644
index 0000000..685e527
--- /dev/null
+++ b/modules/window-opengl/gl_context.h
@@ -0,0 +1,43 @@
+#pragma once
+
+namespace saw {
+namespace gfx {
+class gl_settings {
+public:
+ uint8_t gl_major = 3;
+ uint8_t gl_minor = 3;
+
+ enum class render_type : int32_t { rgba };
+
+ render_type render_t = render_type::rgba;
+
+ bool renderable = true;
+
+ bool window_type = true;
+
+ enum class drawable_type : int32_t {
+ window_bit = 0x01,
+ pixmap_bit = 0x02,
+ pbuffer_bit = 0x04
+ };
+
+ drawable_type drawable_t = drawable_type::window_bit;
+
+ bool double_buffer = true;
+ int red_bits = 8;
+ int green_bits = 8;
+ int blue_bits = 8;
+ int alpha_bits = 8;
+
+ int depth_bits = 24;
+ int stencil_bits = 8;
+
+ bool core_profile = true;
+};
+
+template<typename T>
+class gpu_context;
+
+
+}
+}
diff --git a/modules/window-opengl/gl_window.h b/modules/window-opengl/gl_window.h
new file mode 100644
index 0000000..3bb9f83
--- /dev/null
+++ b/modules/window-opengl/gl_window.h
@@ -0,0 +1,8 @@
+#pragma once
+
+namespace saw {
+namespace gfx {
+template<typename T>
+class gpu_window;
+}
+}
diff --git a/modules/window-opengl/gl_xcb.cpp b/modules/window-opengl/gl_xcb.cpp
new file mode 100644
index 0000000..5ea03f3
--- /dev/null
+++ b/modules/window-opengl/gl_xcb.cpp
@@ -0,0 +1,269 @@
+#include "gl_xcb.h"
+
+#include <cassert>
+#include <cstdint>
+#include <set>
+
+namespace saw {
+namespace gfx {
+namespace {
+glx_library_extensions load_glx_library_extensions(const char* extension_string){
+ std::string_view extensions_view{extension_string};
+
+ std::set<std::string_view> extensions;
+
+ for(;;){
+ size_t n = extensions_view.find_first_of(' ');
+ if( n != extensions_view.npos && n < extensions_view.size()){
+ std::string_view sub_glx_ext = extensions_view.substr(0,n);
+ extensions.insert(sub_glx_ext);
+ extensions_view.remove_prefix(n+1);
+ } else {
+ break;
+ }
+ }
+
+ auto find = extensions.find("GLX_ARB_create_context");
+ GLXContext (*glXCreateContextAttribsARB)(Display*, GLXFBConfig, GLXContext, Bool, const int*) = nullptr;
+ if(find != extensions.end()){
+ glXCreateContextAttribsARB = reinterpret_cast<GLXContext(*)(
+ Display*, GLXFBConfig, GLXContext, Bool, const int*)>(
+ glXGetProcAddress(reinterpret_cast<const GLubyte*>("glXCreateContextAttribsARB")));
+ }
+
+ return {extensions_view, glXCreateContextAttribsARB};
+}
+
+int translate_render_type_settings(gl_settings::render_type cmp){
+ switch(cmp){
+ case gl_settings::render_type::rgba:
+ return GLX_RGBA_BIT;
+ }
+ return 0;
+}
+
+int translate_drawable_type_settings(gl_settings::drawable_type cmp){
+ int i = 0;
+ if (static_cast<int32_t>(cmp) &
+ static_cast<int32_t>(gl_settings::drawable_type::window_bit)) {
+ i |= static_cast<int32_t>(GLX_WINDOW_BIT);
+ }
+ if (static_cast<int32_t>(cmp) &
+ static_cast<int32_t>(gl_settings::drawable_type::pixmap_bit)) {
+ i |= static_cast<int32_t>(GLX_PIXMAP_BIT);
+ }
+ if (static_cast<int32_t>(cmp) &
+ static_cast<int32_t>(gl_settings::drawable_type::pbuffer_bit)) {
+ i |= static_cast<int32_t>(GLX_PBUFFER_BIT);
+ }
+ return i;
+}
+}
+
+gpu_context<backend::gl_linux_xcb>::gpu_context(const glx_library_extensions& ext_lib,
+ own<device<backend::linux_xcb>> dev, int visual_id, GLXContext context, GLXFBConfig fb_config): ext_lib_{ext_lib}, device_{std::move(dev)}, visual_id_{visual_id}, context_{context}, fb_config_{fb_config}{}
+
+gpu_context<backend::gl_linux_xcb>::~gpu_context(){
+ assert(device_);
+ assert(device_->get_xcb_display());
+
+ if(context_){
+ /// @todo Check if this context is bound and only unbind if that is the case
+ // ::glXMakeContextCurrent(device_->get_xcb_display(), None, None, nullptr);
+ ::glXDestroyContext(device_->get_xcb_display(), context_);
+ }
+ device_->flush();
+}
+
+own<gpu_window<backend::gl_linux_xcb>> gpu_context<backend::gl_linux_xcb>::create_window(const video_mode& vid_mode, std::string_view title_view){
+
+ SAW_ASSERT(device_){
+ return nullptr;
+ }
+
+ own<window<backend::linux_xcb>> win = device_->create_xcb_window(vid_mode, title_view, visual_id_);
+ if(!win){
+ return nullptr;
+ }
+
+ ::GLXWindow glx_win = glXCreateWindow(device_->get_xcb_display(), fb_config_, win->get_xcb_window_handle(), nullptr);
+ return heap<gpu_window<backend::gl_linux_xcb>>(std::move(win), *this, glx_win);
+}
+
+void gpu_context<backend::gl_linux_xcb>::flush(){
+ assert(device_);
+ if(device_){
+ device_->flush();
+ }
+}
+
+own<gpu_context<backend::gl_linux_xcb> > create_gl_context(io_provider& prov, const gl_settings& settings){
+ auto eodev = create_xcb_device(prov);
+ if(eodev.is_error()){
+ return nullptr;
+ }
+ own<device<backend::linux_xcb>>& device = eodev.get_value();
+ if (!device) {
+ return nullptr;
+ }
+
+ /*
+ * Translate all attributes
+ */
+ std::vector<int> attributes;
+ attributes.reserve(33);
+
+ attributes.push_back(GLX_X_RENDERABLE);
+ attributes.push_back(settings.renderable ? True : False);
+
+ attributes.push_back(GLX_RENDER_TYPE);
+ attributes.push_back(translate_render_type_settings(settings.render_t));
+
+ attributes.push_back(GLX_RED_SIZE);
+ attributes.push_back(settings.red_bits);
+
+ attributes.push_back(GLX_GREEN_SIZE);
+ attributes.push_back(settings.green_bits);
+
+ attributes.push_back(GLX_BLUE_SIZE);
+ attributes.push_back(settings.blue_bits);
+
+ attributes.push_back(GLX_ALPHA_SIZE);
+ attributes.push_back(settings.alpha_bits);
+
+ attributes.push_back(GLX_DEPTH_SIZE);
+ attributes.push_back(settings.depth_bits);
+
+ attributes.push_back(GLX_STENCIL_SIZE);
+ attributes.push_back(settings.stencil_bits);
+
+ attributes.push_back(GLX_DOUBLEBUFFER);
+ attributes.push_back(settings.double_buffer ? True : False);
+
+ attributes.push_back(GLX_DRAWABLE_TYPE);
+ attributes.push_back(
+ translate_drawable_type_settings(settings.drawable_t));
+
+ attributes.push_back(GLX_X_VISUAL_TYPE);
+ attributes.push_back(GLX_TRUE_COLOR);
+
+ attributes.push_back(None);
+
+ int num_fb_configs = 0;
+
+ glx_library_extensions lib_ext = load_glx_library_extensions(
+ glXQueryExtensionsString(device->get_xcb_display(), device->get_xcb_screen()));
+
+ GLXFBConfig *fb_configs = glXChooseFBConfig(
+ device->get_xcb_display(), device->get_xcb_screen(), &attributes[0], &num_fb_configs);
+ if (!fb_configs || num_fb_configs == 0) {
+ /// @todo log errors
+ return nullptr;
+ }
+
+ if (lib_ext.glXCreateContextAttribsARB) {
+ ::GLXFBConfig fb_config = fb_configs[0];
+
+ ::GLXContext context;
+
+ std::vector<int> glx_attribs;
+ glx_attribs.reserve(11);
+
+ glx_attribs.push_back(GLX_CONTEXT_MAJOR_VERSION_ARB);
+ glx_attribs.push_back(settings.gl_major);
+ glx_attribs.push_back(GLX_CONTEXT_MINOR_VERSION_ARB);
+ glx_attribs.push_back(settings.gl_minor);
+ glx_attribs.push_back(GLX_CONTEXT_PROFILE_MASK_ARB);
+ glx_attribs.push_back(settings.core_profile
+ ? GLX_CONTEXT_CORE_PROFILE_BIT_ARB
+ : GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB);
+ glx_attribs.push_back(None);
+
+ context = lib_ext.glXCreateContextAttribsARB(
+ device->get_xcb_display(), fb_config, NULL, True, &glx_attribs[0]);
+ ::XFree(fb_configs);
+ if (!context) {
+ return nullptr;
+ }
+
+ int visual_id = 0;
+ glXGetFBConfigAttrib(device->get_xcb_display(), fb_config, GLX_VISUAL_ID,
+ &visual_id);
+ return heap<gpu_context<backend::gl_linux_xcb>>(lib_ext, std::move(device), visual_id,
+ context, fb_config);
+ }
+
+ return nullptr;
+}
+
+gpu_window<backend::gl_linux_xcb>::gpu_window(own<window<backend::linux_xcb>> win, gpu_context<backend::gl_linux_xcb> &ctx,
+ ::GLXWindow glx_win)
+ : window_{std::move(win)}, context_{&ctx}, glx_window_handle_{glx_win} {}
+
+gpu_window<backend::gl_linux_xcb>::~gpu_window() {
+ assert(context_->device_);
+ if (context_->device_) {
+ ::glXDestroyWindow(context_->device_->get_xcb_display(), glx_window_handle_);
+ }
+}
+
+void gpu_window<backend::gl_linux_xcb>::bind() {
+ assert(window_ && context_->device_ && context_->device_->get_xcb_display());
+ if (window_) {
+ if (context_->device_ && context_->device_->get_xcb_display()) {
+ ::glXMakeContextCurrent(context_->device_->get_xcb_display(), glx_window_handle_,
+ glx_window_handle_, context_->context_);
+ }
+ }
+}
+
+void gpu_window<backend::gl_linux_xcb>::show() {
+ assert(window_);
+ if (window_) {
+ window_->show();
+ }
+}
+
+void gpu_window<backend::gl_linux_xcb>::hide() {
+ assert(window_);
+ if (window_) {
+ window_->hide();
+ }
+}
+
+void gpu_window<backend::gl_linux_xcb>::swap() {
+ assert(context_->device_);
+ assert(context_->device_->get_xcb_display());
+ if (context_->device_ && context_->device_->get_xcb_display()) {
+ ::glXSwapBuffers(context_->device_->get_xcb_display(), glx_window_handle_);
+ }
+}
+
+const video_mode &gpu_window<backend::gl_linux_xcb>::get_video_mode() const {
+ assert(window_);
+ return window_->get_video_mode();
+}
+
+const std::string_view gpu_window<backend::gl_linux_xcb>::get_title() const {
+ assert(window_);
+ if (window_) {
+ return window_->get_title();
+ }
+ // Kinky
+ return "Bad window";
+}
+
+void gpu_window<backend::gl_linux_xcb>::resize(size_t height, size_t width) {
+ assert(window_);
+ if (window_) {
+ window_->resize(height, width);
+ }
+}
+
+conveyor<data<schema::WindowEvents>> gpu_window<backend::gl_linux_xcb>::on_event() {
+ assert(window_);
+ return window_->on_event();
+}
+
+}
+}
diff --git a/modules/window-opengl/gl_xcb.h b/modules/window-opengl/gl_xcb.h
new file mode 100644
index 0000000..0d84662
--- /dev/null
+++ b/modules/window-opengl/gl_xcb.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include <forstio/window/xcb.h>
+
+#ifndef SAW_OGL
+#error "OpenGL is not supported"
+#endif
+
+#include "gl_backends.h"
+#include "gl_context.h"
+#include "gl_window.h"
+
+#include <GL/glx.h>
+
+namespace saw {
+namespace gfx {
+
+struct glx_library_extensions {
+public:
+ std::string_view raw_extension_string;
+ GLXContext (*glXCreateContextAttribsARB)(Display*, GLXFBConfig, GLXContext, Bool, const int*) = nullptr;
+};
+
+template<>
+class gpu_context<backend::gl_linux_xcb> final {
+private:
+ glx_library_extensions ext_lib_;
+ own<device<backend::linux_xcb>> device_;
+ int visual_id_;
+ GLXContext context_;
+ GLXFBConfig fb_config_;
+
+ friend class gpu_window<backend::gl_linux_xcb>;
+public:
+ gpu_context(const glx_library_extensions&, own<device<backend::linux_xcb>>, int, GLXContext, GLXFBConfig);
+ ~gpu_context();
+
+ own<gpu_window<backend::gl_linux_xcb>> create_window(const video_mode&, std::string_view);
+
+ void flush();
+};
+
+template<>
+class gpu_window<backend::gl_linux_xcb> final {
+private:
+ own<window<backend::linux_xcb>> window_;
+ gpu_context<backend::gl_linux_xcb>* context_;
+
+ ::GLXWindow glx_window_handle_;
+public:
+ gpu_window(own<window<backend::linux_xcb>> window, gpu_context<backend::gl_linux_xcb>& ctx,
+ ::GLXWindow);
+ ~gpu_window();
+
+ void bind();
+ void swap();
+ void show();
+ void hide();
+
+ const video_mode& get_video_mode() const;
+ const std::string_view get_title() const;
+
+ void resize(size_t height, size_t width);
+
+ conveyor<data<schema::WindowEvents>> on_event();
+};
+}
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-09-17 12:50:07 +0000