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BLT-With-Graphics-Template
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push changes, emscript working

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Brett 2023-12-16 23:52:18 -05:00
parent cb07322ceb
commit 2f7d9d1555
6 changed files with 93 additions and 52 deletions
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40
CMakeLists.txt
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@ -45,28 +45,9 @@ file(GLOB_RECURSE PROJECT_BUILD_FILES "${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp")
add_library(BLT_WITH_GRAPHICS ${PROJECT_BUILD_FILES} ${IMGUI_SOURCE_FILES})
if (EMSCRIPTEN)
#set_target_properties(FinalProject PROPERTIES LINK_FLAGS "-s DEMANGLE_SUPPORT=1 --preload-file ${CMAKE_SOURCE_DIR}/assets --bind")
#set_target_properties(FinalProject PROPERTIES LINK_FLAGS "-s DEMANGLE_SUPPORT=1 --preload-file 'assets' --bind")
#set_target_properties(FinalProject PROPERTIES LINK_FLAGS "-sMAX_WEBGL_VERSION=2 -sASSERTIONS=1 -pthread -sPTHREAD_POOL_SIZE=8 -s INITIAL_MEMORY=134217728 -sUSE_GLFW=3 --preload-file 'assets'")
set_target_properties(BLT_WITH_GRAPHICS PROPERTIES LINK_FLAGS "-sMAX_WEBGL_VERSION=2 -sASSERTIONS=1 -pthread -sPTHREAD_POOL_SIZE=8 -s INITIAL_MEMORY=134217728 -sUSE_GLFW=3")
# these flags will be set by cmake automatically based on build type
#set_target_properties(FinalProject PROPERTIES COMPILE_FLAGS "-O3")
set_target_properties(BLT_WITH_GRAPHICS PROPERTIES COMPILE_FLAGS "-pthread")
target_compile_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Wpedantic -Wno-comment -Wno-strict-aliasing)
target_link_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Wpedantic -Wno-comment -Wno-strict-aliasing)
else ()
target_link_libraries(BLT_WITH_GRAPHICS PUBLIC glfw)
target_compile_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Werror -Wpedantic -Wno-comment -Wno-strict-aliasing)
target_link_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Werror -Wpedantic -Wno-comment -Wno-strict-aliasing)
endif ()
target_link_libraries(BLT_WITH_GRAPHICS PUBLIC BLT)
target_link_libraries(BLT_WITH_GRAPHICS PUBLIC freetype)
if (${ENABLE_ADDRSAN} MATCHES ON)
target_compile_options(BLT_WITH_GRAPHICS PRIVATE -fsanitize=address)
target_link_options(BLT_WITH_GRAPHICS PRIVATE -fsanitize=address)
@ -116,4 +97,23 @@ if (${BUILD_GRAPHICS_TESTS})
message("Built graphics tests")
endif ()
project(BLT)
project(BLT_WITH_GRAPHICS)
if (EMSCRIPTEN)
list(APPEND TARGETS BLT_WITH_GRAPHICS)
if (${BUILD_GRAPHICS_TESTS})
list(APPEND TARGETS BLT_GRAPHICS_TESTS)
endif ()
#set_target_properties(FinalProject PROPERTIES LINK_FLAGS "-sMAX_WEBGL_VERSION=2 -sASSERTIONS=1 -pthread -sPTHREAD_POOL_SIZE=8 -s INITIAL_MEMORY=134217728 -sUSE_GLFW=3 --preload-file 'assets'")
set_target_properties(${TARGETS} PROPERTIES LINK_FLAGS "-sMAX_WEBGL_VERSION=2 -sASSERTIONS=1 -sUSE_GLFW=3")
#set_target_properties(BLT_WITH_GRAPHICS PROPERTIES COMPILE_FLAGS "-pthread")
target_compile_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Wpedantic -Wno-comment -Wno-strict-aliasing)
target_link_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Wpedantic -Wno-comment -Wno-strict-aliasing)
else ()
target_link_libraries(BLT_WITH_GRAPHICS PUBLIC glfw)
target_compile_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Werror -Wpedantic -Wno-comment -Wno-strict-aliasing)
target_link_options(BLT_WITH_GRAPHICS PRIVATE -Wall -Werror -Wpedantic -Wno-comment -Wno-strict-aliasing)
endif ()

3
build_emscript.sh
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@ -1,7 +1,8 @@
#!/bin/bash
#mkdir cmake-build-emrelease
rm -fr cmake-build-emrelease
emcmake cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_GRAPHICS_TESTS:BOOL=ON -S ./ -B ./cmake-build-emrelease
emcmake cmake "-DCMAKE_EXE_LINKER_FLAGS=-s USE_GLFW=3 -s USE_WEBGL2=1" -DCMAKE_BUILD_TYPE=Release -DBUILD_GRAPHICS_TESTS:BOOL=ON -S ./ -B ./cmake-build-emrelease
#emcmake cmake -DCMAKE_BUILD_TYPE=Release -DBUILD_GRAPHICS_TESTS:BOOL=ON -S ./ -B ./cmake-build-emrelease
cd cmake-build-emrelease
emmake make -j 32

21
include/blt/gfx/gl_includes.h Normal file
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@ -0,0 +1,21 @@
#pragma once
/*
* Created by Brett on 16/12/23.
* Licensed under GNU General Public License V3.0
* See LICENSE file for license detail
*/
#ifndef BLT_GL_INCLUDES_H
#define BLT_GL_INCLUDES_H
// emscripten provides its own gl bindings.
#ifndef __EMSCRIPTEN__
#include <glad/gl.h>
#else
#include <GLES2/gl2.h>
#include <emscripten.h>
#define GL_GLEXT_PROTOTYPES
#define EGL_EGLEXT_PROTOTYPES
#endif
#endif //BLT_GL_INCLUDES_H

2
include/blt/gfx/window.h
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@ -8,7 +8,7 @@
#ifndef BLT_WITH_GRAPHICS_TEMPLATE_WINDOW_H
#define BLT_WITH_GRAPHICS_TEMPLATE_WINDOW_H
#include <glad/gl.h>
#include <blt/gfx/gl_includes.h>
#include <GLFW/glfw3.h>
#include <functional>
#include <cstdint>

4
src/blt/gfx/glad.cpp
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@ -3,5 +3,7 @@
* Licensed under GNU General Public License V3.0
* See LICENSE file for license detail
*/
#ifndef __EMSCRIPTEN
#define GLAD_GL_IMPLEMENTATION
#include <glad/gl.h>
#include <glad/gl.h>
#endif

75
src/blt/gfx/window.cpp
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@ -96,7 +96,8 @@ namespace blt::gfx
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
ImGuiIO& io = ImGui::GetIO();
(void) io;
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
@ -113,13 +114,39 @@ namespace blt::gfx
#endif
}
void loop(void* arg)
{
const auto& data = *((const window_data*) arg);
/* -- Get the current framebuffer size, update the global width/height state, along with OpenGL viewport -- */
glfwGetFramebufferSize(window_state.window, &window_state.width, &window_state.height);
glViewport(0, 0, window_state.width, window_state.height);
// TODO: user option for this
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* -- Begin the next ImGUI frame -- */
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
/* -- Call user update function -- */
data.update(window_state.width, window_state.height);
/* -- Render the ImGUI frame -- */
ImGui::Render();
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
/* -- Update GLFW state -- */
glfwSwapBuffers(window_state.window);
glfwPollEvents();
}
void init(const window_data& data)
{
/* -- Setup Error Callback -- */
/* -- Set up Error Callback -- */
glfwSetErrorCallback(error_callback);
BLT_ASSERT(glfwInit() && "Unable to init GLFW. Aborting.");
/* -- Setup Window Context -- */
/* -- Set up Window Context -- */
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, data.context.GL_MAJOR);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, data.context.GL_MINOR);
glfwWindowHint(GLFW_DOUBLEBUFFER, data.context.DOUBLE_BUFFER);
@ -132,42 +159,32 @@ namespace blt::gfx
/* -- Set Window Specifics + OpenGL -- */
glfwMakeContextCurrent(window_state.window);
glfwSwapInterval(data.sync_interval);
#ifndef __EMSCRIPTEN__
gladLoadGL(glfwGetProcAddress);
#endif
/* -- Setup our local callbacks, ImGUI will then call these -- */
/* -- Set up our local callbacks, ImGUI will then call these -- */
create_callbacks();
/* -- Setup ImGUI -- */
/* -- Set up ImGUI -- */
setup_ImGUI();
/* -- Call User Provided post-window-init function -- */
data.init();
#ifdef __EMSCRIPTEN__
/*
* "setting 0 or a negative value as the fps will use the browser’s requestAnimationFrame mechanism to call the main loop function.
* This is HIGHLY recommended if you are doing rendering, as the browser’s requestAnimationFrame will
* make sure you render at a proper smooth rate that lines up properly with the browser and monitor."
* https://emscripten.org/docs/api_reference/emscripten.h.html
*/
emscripten_set_main_loop_arg(loop, (void*)&data, 0, true);
#else
/* -- General Loop -- */
while (!glfwWindowShouldClose(window_state.window))
{
/* -- Get the current framebuffer size, update the global width/height state, along with OpenGL viewport -- */
glfwGetFramebufferSize(window_state.window, &window_state.width, &window_state.height);
glViewport(0, 0, window_state.width, window_state.height);
// TODO: user option for this
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
/* -- Begin the next ImGUI frame -- */
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplGlfw_NewFrame();
ImGui::NewFrame();
/* -- Call user update function -- */
data.update(window_state.width, window_state.height);
/* -- Render the ImGUI frame -- */
ImGui::Render();
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
/* -- Update GLFW state -- */
glfwSwapBuffers(window_state.window);
glfwPollEvents();
}
loop((void*)&data);
#endif
}
void cleanup()