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run imgui demo

This commit is contained in:
Kyle Isom 2023-10-08 22:29:47 -07:00
parent 777afc11d3
commit 8125c18ae6
7 changed files with 142 additions and 22 deletions
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10
CMakeLists.txt
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@ -4,6 +4,7 @@ project(kge)
find_package(SDL2 REQUIRED)
find_package(OpenGL REQUIRED)
find_package(Freetype REQUIRED)
add_compile_options("-Wall" "-Wextra" "-Werror")
add_definitions(-DIMGUI_ENABLE_FREETYPE)
@ -20,17 +21,24 @@ add_library(imgui STATIC
ext/imgui/backends/imgui_impl_sdl2.cpp
ext/imgui/backends/imgui_impl_sdl2.h
ext/imgui/backends/imgui_impl_opengl3.cpp
ext/imgui/backends/imgui_impl_opengl3.h)
ext/imgui/backends/imgui_impl_opengl3.h
ext/imgui/misc/freetype/imgui_freetype.cpp
ext/imgui/misc/freetype/imgui_freetype.h
)
add_library(imgui::imgui ALIAS imgui)
target_link_libraries(imgui
PUBLIC
OpenGL::GL
$<TARGET_NAME_IF_EXISTS:SDL2::SDL2main>
$<IF:$<TARGET_EXISTS:SDL2::SDL2>,SDL2::SDL2,SDL2::SDL2-static>
Freetype::Freetype
)
target_include_directories(imgui PUBLIC
ext/imgui/
ext/imgui/backends/
ext/imgui/misc/freetype
${FREETYPE_INCLUDE_DIRS}
)
include_directories(ext/)

7
Makefile Normal file
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@ -0,0 +1,7 @@
.PHONY: all
all:
.PHONY: deps
deps:
sudo apt-get install libfreetype-dev libsdl2-dev libopengl-dev

2
ext/imgui/misc/freetype/imgui_freetype.cpp
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@ -38,7 +38,7 @@
#include "imgui_freetype.h"
#include "imgui_internal.h" // ImMin,ImMax,ImFontAtlasBuild*,
#include <stdint.h>
#include <ft2build.h>
#include <freetype2/ft2build.h>
#include FT_FREETYPE_H // <freetype/freetype.h>
#include FT_MODULE_H // <freetype/ftmodapi.h>
#include FT_GLYPH_H // <freetype/ftglyph.h>

16
fonts/b612_mono.h
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@ -5,8 +5,8 @@
// File: 'B612_Mono/B612Mono-Regular.ttf' (136712 bytes)
// Exported using binary_to_compressed_c.cpp
static const unsigned int B612Mono_Regular.ttf_compressed_size = 72615;
static const unsigned int B612Mono_Regular.ttf_compressed_data[72616/4] =
static const unsigned int B612Mono_Regular_compressed_size = 72615;
static const unsigned int B612Mono_Regular_compressed_data[72616/4] =
{
0x0000bc57, 0x00000000, 0x08160200, 0x00000400, 0x00010025, 0x82100000, 0x00042e04, 0x2f534f00, 0xb5872c32, 0x0100005c, 0x3b1582c4, 0x4d445660,
0x712c6a58, 0x11000098, 0x05000024, 0x616d63e0, 0x736a3e70, 0x03000069, 0x04291382, 0x74766340, 0x0c5d0420, 0x202f8240, 0x2b2f8260, 0x6770662a,
@ -1527,8 +1527,8 @@ static const unsigned int B612Mono_Regular.ttf_compressed_data[72616/4] =
// File: 'B612_Mono/B612Mono-Bold.ttf' (135904 bytes)
// Exported using binary_to_compressed_c.cpp
static const unsigned int B612Mono_Bold.ttf_compressed_size = 74748;
static const unsigned int B612Mono_Bold.ttf_compressed_data[74748/4] =
static const unsigned int B612Mono_Bold_compressed_size = 74748;
static const unsigned int B612Mono_Bold_compressed_data[74748/4] =
{
0x0000bc57, 0x00000000, 0xe0120200, 0x00000400, 0x00010025, 0x82100000, 0x00042e04, 0x2f534f00, 0xb5b32d32, 0x01000041, 0x3b1582c4, 0x4d445660,
0x712c6a58, 0x11000098, 0x0500000c, 0x616d63e0, 0x736a3e70, 0x03000069, 0x04291382, 0x74766340, 0x0c5d0420, 0x202f8240, 0x2c2f8260, 0x6770662a,
@ -3094,8 +3094,8 @@ static const unsigned int B612Mono_Bold.ttf_compressed_data[74748/4] =
// File: 'B612_Mono/B612Mono-BoldItalic.ttf' (121732 bytes)
// Exported using binary_to_compressed_c.cpp
static const unsigned int B612Mono_BoldItalic.ttf_compressed_size = 69211;
static const unsigned int B612Mono_BoldItalic.ttf_compressed_data[69212/4] =
static const unsigned int B612Mono_BoldItalic_compressed_size = 69211;
static const unsigned int B612Mono_BoldItalic_compressed_data[69212/4] =
{
0x0000bc57, 0x00000000, 0x84db0100, 0x00000400, 0x00010025, 0x82100000, 0x00042e04, 0x2f534f00, 0xb5b32d32, 0x01000042, 0x3b1582c4, 0x4d445660,
0x712c6a58, 0x11000098, 0x05000044, 0x616d63e0, 0x736a3e70, 0x03000069, 0x04291382, 0x74766340, 0x0c5d0420, 0x202f8240, 0x2c2f8260, 0x6770662a,
@ -4545,8 +4545,8 @@ static const unsigned int B612Mono_BoldItalic.ttf_compressed_data[69212/4] =
// File: 'B612_Mono/B612Mono-Italic.ttf' (118888 bytes)
// Exported using binary_to_compressed_c.cpp
static const unsigned int B612Mono_Italic.ttf_compressed_size = 67763;
static const unsigned int B612Mono_Italic.ttf_compressed_data[67764/4] =
static const unsigned int B612Mono_Italic_compressed_size = 67763;
static const unsigned int B612Mono_Italic_compressed_data[67764/4] =
{
0x0000bc57, 0x00000000, 0x68d00100, 0x00000400, 0x00010025, 0x82100000, 0x00042e04, 0x2f534f00, 0xb5872c32, 0x0100002a, 0x3b1582c4, 0x4d445660,
0x712c6a58, 0x11000098, 0x0500001c, 0x616d63e0, 0x736a3e70, 0x03000069, 0x04291382, 0x74766340, 0x0c5d0420, 0x202f8240, 0x2c2f8260, 0x6770662a,

16
fonts/brassmono.h
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@ -5,8 +5,8 @@
// File: 'BrassMono/BrassMono-Italic.ttf' (38092 bytes)
// Exported using binary_to_compressed_c.cpp
static const unsigned int BrassMono_Italic.ttf_compressed_size = 29682;
static const unsigned int BrassMono_Italic.ttf_compressed_data[29684/4] =
static const unsigned int BrassMono_Italic_compressed_size = 29682;
static const unsigned int BrassMono_Italic_compressed_data[29684/4] =
{
0x0000bc57, 0x00000000, 0xcc940000, 0x00000400, 0x00010025, 0x82120000, 0x00042604, 0x49534420, 0x820d8247, 0xc494210c, 0x082c0782, 0x46454447,
0x9b002800, 0x2c010000, 0x1e280f82, 0x322f534f, 0x6bfcb98b, 0x4c200f82, 0x56280f82, 0x70616d63, 0xcbe7cd60, 0xa4300f82, 0x7a020000, 0x20747663,
@ -633,8 +633,8 @@ static const unsigned int BrassMono_Italic.ttf_compressed_data[29684/4] =
// File: 'BrassMono/BrassMono-Bold.ttf' (38512 bytes)
// Exported using binary_to_compressed_c.cpp
static const unsigned int BrassMono_Bold.ttf_compressed_size = 28400;
static const unsigned int BrassMono_Bold.ttf_compressed_data[28400/4] =
static const unsigned int BrassMono_Bold_compressed_size = 28400;
static const unsigned int BrassMono_Bold_compressed_data[28400/4] =
{
0x0000bc57, 0x00000000, 0x70960000, 0x00000400, 0x00010025, 0x82120000, 0x00042604, 0x49534420, 0x820d8247, 0x6896210c, 0x082c0782, 0x46454447,
0x9b002800, 0x2c010000, 0x1e280f82, 0x322f534f, 0xd6fce48c, 0x4c200f82, 0x56280f82, 0x70616d63, 0xcbe7cd60, 0xa4300f82, 0x7a020000, 0x20747663,
@ -1234,8 +1234,8 @@ static const unsigned int BrassMono_Bold.ttf_compressed_data[28400/4] =
// File: 'BrassMono/BrassMono-BoldItalic.ttf' (41424 bytes)
// Exported using binary_to_compressed_c.cpp
static const unsigned int BrassMono_BoldItalic.ttf_compressed_size = 30331;
static const unsigned int BrassMono_BoldItalic.ttf_compressed_data[30332/4] =
static const unsigned int BrassMono_BoldItalic_compressed_size = 30331;
static const unsigned int BrassMono_BoldItalic_compressed_data[30332/4] =
{
0x0000bc57, 0x00000000, 0xd0a10000, 0x00000400, 0x00010025, 0x82120000, 0x00042604, 0x49534420, 0x820d8247, 0xc8a1210c, 0x082c0782, 0x46454447,
0x9b002800, 0x2c010000, 0x1e280f82, 0x322f534f, 0x8bfce58c, 0x4c200f82, 0x56280f82, 0x70616d63, 0xcbe7cd60, 0xa4300f82, 0x7a020000, 0x20747663,
@ -1875,8 +1875,8 @@ static const unsigned int BrassMono_BoldItalic.ttf_compressed_data[30332/4] =
// File: 'BrassMono/BrassMono-Regular.ttf' (36504 bytes)
// Exported using binary_to_compressed_c.cpp
static const unsigned int BrassMono_Regular.ttf_compressed_size = 28091;
static const unsigned int BrassMono_Regular.ttf_compressed_data[28092/4] =
static const unsigned int BrassMono_Regular_compressed_size = 28091;
static const unsigned int BrassMono_Regular_compressed_data[28092/4] =
{
0x0000bc57, 0x00000000, 0x988e0000, 0x00000400, 0x00010025, 0x82120000, 0x00042604, 0x49534420, 0x820d8247, 0x908e210c, 0x082c0782, 0x46454447,
0x9b002800, 0x2c010000, 0x1e280f82, 0x322f534f, 0xf6fcb88b, 0x4c200f82, 0x56280f82, 0x70616d63, 0xcbe7cd60, 0xa4300f82, 0x7a020000, 0x20747663,

3
fonts/gen_font_includes.py
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@ -8,7 +8,8 @@ import subprocess
DEFAULT_FONTS = ['B612_Mono', 'BrassMono']
def generate_font(header_file, path):
symbol_name=os.path.basename(path).replace('-', '_')
symbol_name=os.path.splitext(os.path.basename(path))[0]
symbol_name=symbol_name.replace('-', '_')
output = subprocess.check_output(
f'binary_to_compressed_c "{path}" {symbol_name}',
shell=True)

104
kge.cc
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@ -11,6 +11,9 @@
#include <SDL2/SDL_opengl.h>
#endif
#include "fonts/b612_mono.h"
#include "fonts/brassmono.h"
int
main()
@ -61,6 +64,107 @@ main()
SDL_GL_MakeCurrent(window, gl_context);
SDL_GL_SetSwapInterval(1); // Enable vsync
// Setup Dear ImGui context
IMGUI_CHECKVERSION();
ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO(); (void)io;
io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
// Setup Dear ImGui style
ImGui::StyleColorsDark();
//ImGui::StyleColorsLight();
// Setup Platform/Renderer backends
ImGui_ImplSDL2_InitForOpenGL(window, gl_context);
ImGui_ImplOpenGL3_Init(glsl_version);
io.Fonts->AddFontFromMemoryCompressedTTF(B612Mono_Regular_compressed_data, B612Mono_Regular_compressed_size, 12);
bool done = false;
bool show_demo_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
while (!done) {
// Poll and handle events (inputs, window resize, etc.)
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
SDL_Event event;
while (SDL_PollEvent(&event))
{
ImGui_ImplSDL2_ProcessEvent(&event);
if (event.type == SDL_QUIT)
done = true;
if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window))
done = true;
}
// Start the Dear ImGui frame
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplSDL2_NewFrame();
ImGui::NewFrame();
if (show_demo_window)
ImGui::ShowDemoWindow(&show_demo_window);
// 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window.
{
static float f = 0.0f;
static int counter = 0;
ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.
ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
ImGui::Checkbox("Another Window", &show_another_window);
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
counter++;
ImGui::SameLine();
ImGui::Text("counter = %d", counter);
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
ImGui::End();
}
// 3. Show another simple window.
if (show_another_window)
{
// Pass a pointer to our bool variable (the window
// will have a closing button that will clear the bool
// when clicked)
ImGui::Begin("Another Window", &show_another_window);
ImGui::Text("Hello from another window!");
if (ImGui::Button("Close Me"))
show_another_window = false;
ImGui::End();
}
// Rendering
ImGui::Render();
glViewport(0, 0, (int)io.DisplaySize.x, (int)io.DisplaySize.y);
glClearColor(clear_color.x * clear_color.w, clear_color.y * clear_color.w, clear_color.z * clear_color.w, clear_color.w);
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
SDL_GL_SwapWindow(window);
}
// Cleanup
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplSDL2_Shutdown();
ImGui::DestroyContext();
SDL_GL_DeleteContext(gl_context);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}