Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Examples: Add OpenGL ES 2.0 support to SDL2 and GLFW examples #3951

Closed
wants to merge 1 commit into from
Closed

Examples: Add OpenGL ES 2.0 support to SDL2 and GLFW examples #3951

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
13 changes: 11 additions & 2 deletions examples/example_glfw_opengl3/Makefile
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,15 +21,19 @@ SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui
SOURCES += $(IMGUI_DIR)/backends/imgui_impl_glfw.cpp $(IMGUI_DIR)/backends/imgui_impl_opengl3.cpp
OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
UNAME_S := $(shell uname -s)
LINUX_GL_LIBS = -lGL

CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
CXXFLAGS += -g -Wall -Wformat
LIBS =

##---------------------------------------------------------------------
## OPENGL LOADER
## OPENGL LOADER / OPENGL ES
##---------------------------------------------------------------------

## See below for OpenGL ES option (no loader required) - comment out
## the following if you want to use OpenGL ES instead of Desktop GL.

## Using OpenGL loader: gl3w [default]
SOURCES += ../libs/gl3w/GL/gl3w.c
CXXFLAGS += -I../libs/gl3w -DIMGUI_IMPL_OPENGL_LOADER_GL3W
Expand All @@ -56,13 +60,18 @@ CXXFLAGS += -I../libs/gl3w -DIMGUI_IMPL_OPENGL_LOADER_GL3W
# CXXFLAGS += -DIMGUI_IMPL_OPENGL_LOADER_GLBINDING2
# LIBS += -lglbinding

## Using OpenGL ES, no loader required
## This assumes a GL ES library available in the system, e.g. libGLESv2.so
# CXXFLAGS += -DIMGUI_IMPL_OPENGL_ES2
# LINUX_GL_LIBS = -lGLESv2

##---------------------------------------------------------------------
## BUILD FLAGS PER PLATFORM
##---------------------------------------------------------------------

ifeq ($(UNAME_S), Linux) #LINUX
ECHO_MESSAGE = "Linux"
LIBS += -lGL `pkg-config --static --libs glfw3`
LIBS += $(LINUX_GL_LIBS) `pkg-config --static --libs glfw3`

CXXFLAGS += `pkg-config --cflags glfw3`
CFLAGS = $(CXXFLAGS)
Expand Down
12 changes: 10 additions & 2 deletions examples/example_glfw_opengl3/main.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -8,11 +8,13 @@
#include "imgui_impl_opengl3.h"
#include <stdio.h>

#if defined(IMGUI_IMPL_OPENGL_ES2)
#include <GLES2/gl2.h>
// About Desktop OpenGL function loaders:
// Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
// Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
// You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
#if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
#include <GL/gl3w.h> // Initialize with gl3wInit()
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
#include <GL/glew.h> // Initialize with glewInit()
Expand Down Expand Up @@ -57,13 +59,19 @@ int main(int, char**)
return 1;

// Decide GL+GLSL versions
#ifdef __APPLE__
#if defined(__APPLE__)
// GL 3.2 + GLSL 150
const char* glsl_version = "#version 150";
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE); // 3.2+ only
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE); // Required on Mac
#elif defined(IMGUI_IMPL_OPENGL_ES2)
// GL ES 2.0 + GLSL 100
const char* glsl_version = "#version 100";
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 0);
glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);
#else
// GL 3.0 + GLSL 130
const char* glsl_version = "#version 130";
Expand Down
16 changes: 14 additions & 2 deletions examples/example_sdl_opengl3/Makefile
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,15 +21,19 @@ SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui
SOURCES += $(IMGUI_DIR)/backends/imgui_impl_sdl.cpp $(IMGUI_DIR)/backends/imgui_impl_opengl3.cpp
OBJS = $(addsuffix .o, $(basename $(notdir $(SOURCES))))
UNAME_S := $(shell uname -s)
LINUX_GL_LIBS = -lGL

CXXFLAGS = -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends
CXXFLAGS += -g -Wall -Wformat
LIBS =

##---------------------------------------------------------------------
## OPENGL LOADER
## OPENGL LOADER / OPENGL ES
##---------------------------------------------------------------------

## See below for OpenGL ES option (no loader required) - comment out
## the following if you want to use OpenGL ES instead of Desktop GL.

## Using OpenGL loader: gl3w [default]
SOURCES += ../libs/gl3w/GL/gl3w.c
CXXFLAGS += -I../libs/gl3w -DIMGUI_IMPL_OPENGL_LOADER_GL3W
Expand All @@ -56,13 +60,21 @@ CXXFLAGS += -I../libs/gl3w -DIMGUI_IMPL_OPENGL_LOADER_GL3W
# CXXFLAGS += -DIMGUI_IMPL_OPENGL_LOADER_GLBINDING2
# LIBS += -lglbinding

## Using OpenGL ES, no loader required
## This assumes a GL ES library available in the system, e.g. libGLESv2.so
# CXXFLAGS += -DIMGUI_IMPL_OPENGL_ES2
# LINUX_GL_LIBS = -lGLESv2
## If you're on a Raspberry Pi and want to use the legacy drivers,
## use the following instead:
# LINUX_GL_LIBS = -L/opt/vc/lib -lbrcmGLESv2

##---------------------------------------------------------------------
## BUILD FLAGS PER PLATFORM
##---------------------------------------------------------------------

ifeq ($(UNAME_S), Linux) #LINUX
ECHO_MESSAGE = "Linux"
LIBS += -lGL -ldl `sdl2-config --libs`
LIBS += $(LINUX_GL_LIBS) -ldl `sdl2-config --libs`

CXXFLAGS += `sdl2-config --cflags`
CFLAGS = $(CXXFLAGS)
Expand Down
13 changes: 11 additions & 2 deletions examples/example_sdl_opengl3/main.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,11 +10,13 @@
#include <stdio.h>
#include <SDL.h>

#if defined(IMGUI_IMPL_OPENGL_ES2)
#include <GLES2/gl2.h>
// About Desktop OpenGL function loaders:
// Modern desktop OpenGL doesn't have a standard portable header file to load OpenGL function pointers.
// Helper libraries are often used for this purpose! Here we are supporting a few common ones (gl3w, glew, glad).
// You may use another loader/header of your choice (glext, glLoadGen, etc.), or chose to manually implement your own.
#if defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GL3W)
#include <GL/gl3w.h> // Initialize with gl3wInit()
#elif defined(IMGUI_IMPL_OPENGL_LOADER_GLEW)
#include <GL/glew.h> // Initialize with glewInit()
Expand Down Expand Up @@ -49,13 +51,20 @@ int main(int, char**)
}

// Decide GL+GLSL versions
#ifdef __APPLE__
#if defined(__APPLE__)
// GL 3.2 Core + GLSL 150
const char* glsl_version = "#version 150";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG); // Always required on Mac
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 2);
#elif defined(IMGUI_IMPL_OPENGL_ES2)
// GL ES 2.0 + GLSL 100
const char* glsl_version = "#version 100";
SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, 0);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_ES);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 2);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 0);
#else
// GL 3.0 + GLSL 130
const char* glsl_version = "#version 130";
Expand Down