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// Required for OpenGL rendering backend
#define GLAD_GL_IMPLEMENTATION
#include <glad/gl.h>
#undef GLAD_GL_IMPLEMENTATION
// TODO: import vulkan thingymajig once I get around to it.
// TODO: move OpenGL initialization code at some point
#undef GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>
#include <daw/logging.h>
#include <daw/window.h>
static void window_resize_callback(GLFWwindow *restrict window, int width, int height);
static void framebuffer_resize_callback(GLFWwindow *restrict window, int width, int height);
static void glfw_err_callback(int code, const char* description);
static void render_init_opengl(Window *restrict w, const u32 flags);
void window_size_glfw(GLFWwindow *restrict w, ivec2 *restrict dst);
Window* window_init_glfw(const char *restrict windowtitle, ivec2 windowsize, const u32 flags) {
Window* ret = NULL;
GLFWwindow* window = NULL;
glfwSetErrorCallback(&glfw_err_callback);
INFO_("initializing glfw...");
if (glfwInit() == GLFW_FALSE) {
const char *desc;
int code = glfwGetError(&desc);
ERROR("failed to initialize glfw [%d]: %s\n", code, *desc);
exit(EXIT_FAILURE);
} else
printf("ok\n");
INFO_("initializing window...");
//glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
if (!(flags & DAW_WINDOW_RESIZEABLE)) {
glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);
}
glfwWindowHint(GLFW_DECORATED, GLFW_FALSE);
glfwWindowHint(GLFW_FLOATING, GLFW_TRUE);
glfwWindowHint(GLFW_SAMPLES, 0); // Disable anti aliasing
// Use a modern opengl version
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 6);
// Lean and mean
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
#ifdef __APPLE__
// To make MacOS happy; should not be needed
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
#endif
/* "On Wayland specifically, you need to swap the buffers
* once of a window for it to become visible." */
{
GLFWmonitor* mon = NULL;
if (flags & DAW_WINDOW_FULLSCREEN) mon = glfwGetPrimaryMonitor();
window = glfwCreateWindow(windowsize[0], windowsize[1], windowtitle, mon, NULL);
}
if (window == NULL) {
ERROR("Failed to create GLFW window!\n");
const char *desc;
int code = glfwGetError(&desc);
ERROR("failed to initialize glfw window [%d]: %s\n", code, desc);
exit(EXIT_FAILURE);
} else
printf("ok\n");
// Setup callbacks
glfwSetFramebufferSizeCallback(window, framebuffer_resize_callback);
glfwSetWindowSizeCallback(window, window_resize_callback);
glfwSetKeyCallback(window, (GLFWkeyfun)key_callback);
// Create the window datastructure
ret = (Window*)calloc(1, sizeof(Window));
ret->framework = WINDOW_FRAMEWORK_GLFW;
ret->renderer = WINDOW_RENDERER_NONE;
ret->window = window;
/* Last parameter is used for the renderer */
ret->context = NULL;
{
ivec2 wsize;
vec2 wscaling;
glfwGetWindowContentScale(window, &wscaling[0], &wscaling[1]);
glfwGetWindowSize(window, &wsize[0], &wsize[1]);
ret->windowsize[0] = (i32)((f32)wsize[0] * wscaling[0]);
ret->windowsize[1] = (i32)((f32)wsize[1] * wscaling[1]);
INFO("WINDOW CONTENT SCALING: %.2f x %.2f", wscaling[0], wscaling[1]);
INFO("WINDOW SIZE: %d x %d -> %d x %d", wsize[0], wsize[1], ret->windowsize[0], ret->windowsize[1]);
}
// TODO: set this to `ret` once all the garbage is moved to `struct Window`
glfwSetWindowUserPointer(window, (void*)ret);
render_init_opengl(ret, flags);
return ret;
}
void window_destroy_glfw(Window *restrict w) {
glfwDestroyWindow(w->window);
w->window = NULL;
// If we ever do multi-window support, we need to make sure this is the last
// window before terminating
glfwTerminate();
switch(w->renderer) {
case WINDOW_RENDERER_OPENGL:
// Missing unloader function in glad MX library
free(w->context);
w->context = NULL;
break;
default:
ERROR("Destroying unknown renderer type.");
}
}
void window_resize_glfw(Window *restrict window, int width, int height) {
window_resize_callback(window->window, width, height);
framebuffer_resize_callback(window->window, width, height);
DEBUG("Resizing to <%d,%d>\n", width, height);
}
bool window_should_close_glfw(Window *restrict window) {
return glfwWindowShouldClose(window->window);
}
void window_poll_glfw(void) {
glfwPollEvents();
}
// Helper function implementations
static void window_resize_callback(GLFWwindow* window, int width, int height) {
(void)width; (void)height;
Window* w = glfwGetWindowUserPointer(window);
glfwSwapBuffers(window);
if (w != NULL) {
const GladGLContext* gl = w->context;
gl->Finish();
}
DEBUG("WINDOW RESIZE <%d,%d>\n", width, height);
}
static void framebuffer_resize_callback(GLFWwindow* window, int width, int height) {
(void)width; (void)height;
Window* w = glfwGetWindowUserPointer(window);
if (w != NULL) {
const GladGLContext* gl = w->context;
//TODO: Move the camera to window->renderer
//Camera* c = w->cam;
gl->Viewport(0,0, width, height);
w->windowsize[0] = width;
w->windowsize[1] = height;
//r_reset_camera(c);
}
DEBUG("FRAMEBUFFER RESIZE <%d,%d>\n", width, height);
}
static void glfw_err_callback(int code, const char* description) {
ERROR("glfw [%d]: %s\n", code, description);
// Terminate?
exit(EXIT_FAILURE);
}
static void render_init_opengl(Window *restrict w, const u32 flags) {
if (w->renderer != WINDOW_RENDERER_NONE || w->context != NULL) {
ERROR("Window already initialized with a renderer!");
return;
}
// This is GLFW specific
glfwMakeContextCurrent(w->window);
GladGLContext* ctx = (GladGLContext*)malloc(sizeof(GladGLContext));
if (!ctx) {
ERROR("Failed to allocate memory for context");
}
int version = gladLoadGLContext(ctx, glfwGetProcAddress);
INFO("Loaded OpenGL %d.%d", GLAD_VERSION_MAJOR(version), GLAD_VERSION_MINOR(version));
if (ctx == NULL) {
ERROR("Failed to create glad context");
exit(EXIT_FAILURE);
}
if (flags & DAW_WINDOW_VSYNC) {
glfwSwapInterval(1);
} else {
glfwSwapInterval(0);
}
ctx->Viewport(0, 0, w->windowsize[0], w->windowsize[1]);
#ifdef _DEBUG
ctx->ClearColor((float)0x10 / 255.f, (float)0x0a / 255.f, (float)0x33 / 255.f, 0.f);
#else
ctx->ClearColor(0x0, 0x0, 0x0, 0.f);
#endif
// Make sure faces closest to the camera are drawn on-top of faces that are
// further away
ctx->Enable(GL_DEPTH_TEST);
ctx->DepthFunc(GL_LESS);
w->context = ctx;
w->renderer = WINDOW_RENDERER_OPENGL;
}
void window_size_glfw(GLFWwindow *restrict w, ivec2 *restrict dst) {
ivec2 wsize;
vec2 wscaling;
glfwGetWindowContentScale(w, &wscaling[0], &wscaling[1]);
glfwGetWindowSize(w, &wsize[0], &wsize[1]);
*dst[0] = (i32)((f32)wsize[0] * wscaling[0]);
*dst[1] = (i32)((f32)wsize[1] * wscaling[1]);
}
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