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#include "graphics.h"
#include <EGL/egl.h>
#include <EGL/eglplatform.h>
#include <glad.h>
#include <cstring>
#include "cglm/vec4.h"
#include "utils.h"
#include "wlstate.h"
#define WAYC_OPENGL_MAJOR 4
#define WAYC_OPENGL_MINOR 6
#define WAYC_COLOR_BITS 8
/* clang-format off */
static EGLint WAYC_EGL_ATTRS[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, WAYC_COLOR_BITS,
EGL_GREEN_SIZE, WAYC_COLOR_BITS,
EGL_BLUE_SIZE, WAYC_COLOR_BITS,
EGL_ALPHA_SIZE, WAYC_COLOR_BITS,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_NONE
};
static EGLint WAYC_OGL_ATTRS[] = {
EGL_CONTEXT_MAJOR_VERSION, WAYC_OPENGL_MAJOR,
EGL_CONTEXT_MINOR_VERSION, WAYC_OPENGL_MINOR,
EGL_NONE
};
/* clang-format on */
static bool wayc_graphics_config(EGLDisplay display, EGLConfig* config) {
wayc_notnull(display);
wayc_notnull(config);
EGLint nconfs = 0;
if (!eglChooseConfig(display, WAYC_EGL_ATTRS, config, 1, &nconfs))
return false;
return nconfs > 0;
}
enum graphics_error_e wayc_graphics_init(struct graphics_s* graphics,
struct wlstate_s* state) {
wayc_notnull(graphics);
wayc_notnull(state);
memset(graphics, 0, sizeof(*graphics));
EGLDisplay display = eglGetDisplay(state->display);
if (display == EGL_NO_DISPLAY) return GRAPHICS_ERROR_ACQUIRE_DISPLAY;
if (!eglInitialize(display, nullptr, nullptr)) {
eglTerminate(display);
return GRAPHICS_ERROR_ACQUIRE_DISPLAY;
}
if (!eglBindAPI(EGL_OPENGL_API)) {
eglTerminate(display);
return GRAPHICS_ERROR_USE_DESKTOP;
}
EGLConfig config;
if (!wayc_graphics_config(display, &config)) {
eglTerminate(display);
return GRAPHICS_ERROR_SELECT_CONFIG;
}
EGLContext context =
eglCreateContext(display, config, EGL_NO_CONTEXT, WAYC_OGL_ATTRS);
if (context == EGL_NO_CONTEXT) {
eglDestroyContext(display, context);
eglTerminate(display);
return GRAPHICS_ERROR_CREATE_CONTEXT;
}
graphics->display = display;
graphics->config = config;
graphics->context = context;
return GRAPHICS_ERROR_NONE;
}
void wayc_graphics_deinit(struct graphics_s* graphics) {
wayc_notnull(graphics);
if (graphics->display == nullptr || graphics->context == nullptr) return;
eglDestroyContext(graphics->display, graphics->context);
eglTerminate(graphics->display);
graphics->display = nullptr;
graphics->context = nullptr;
}
enum renderer_error_e wayc_renderer_init(struct renderer_s* renderer,
struct window_s* window,
struct graphics_s* graphics, i32 width,
i32 height, vec4 ccolor) {
wayc_notnull(renderer);
wayc_notnull(window);
wayc_notnull(graphics);
memset(renderer, 0, sizeof(*renderer));
wl_egl_window_t ewindow =
wl_egl_window_create(window->surface, width, height);
if (ewindow == nullptr) return RENDERER_ERROR_WINDOW_CREATION;
EGLNativeWindowType nwindow = (EGLNativeWindowType)ewindow;
EGLSurface esurface = eglCreateWindowSurface(
graphics->display, graphics->config, nwindow, nullptr);
if (esurface == EGL_NO_SURFACE) {
wl_egl_window_destroy(ewindow);
return RENDERER_ERROR_SURFACE_CREATION;
}
sg_desc desc = {};
sg_setup(&desc);
renderer->graphics = graphics;
renderer->ewindow = ewindow;
renderer->esurface = esurface;
renderer->width = width;
renderer->height = height;
glm_vec4_copy(ccolor, renderer->ccolor);
wayc_renderer_use(renderer);
if (gladLoadGLLoader((GLADloadproc)eglGetProcAddress) == 0) {
wayc_renderer_deinit(renderer);
return RENDERER_ERROR_LOAD_FUNCTIONS;
}
return RENDERER_ERROR_NONE;
}
void wayc_renderer_begin(struct renderer_s* renderer) {
wayc_notnull(renderer);
sg_gl_swapchain gl_swap = {};
gl_swap.framebuffer = 0;
sg_swapchain swap = {};
swap.gl = gl_swap;
swap.width = renderer->width;
swap.height = renderer->height;
swap.sample_count = 1;
sg_color_attachment_action color_action = {};
color_action.load_action = SG_LOADACTION_CLEAR;
color_action.clear_value = {
WAYC_X(renderer->ccolor), WAYC_Y(renderer->ccolor),
WAYC_Z(renderer->ccolor), WAYC_A(renderer->ccolor)};
color_action.store_action = SG_STOREACTION_STORE;
sg_pass_action action = {};
action.colors[0] = color_action;
sg_pass pass = {};
pass.swapchain = swap;
pass.action = action;
sg_begin_pass(&pass);
}
void wayc_renderer_end(struct renderer_s* renderer) {
wayc_notnull(renderer);
struct graphics_s* graphics = renderer->graphics;
sg_end_pass();
sg_commit();
eglSwapBuffers(graphics->display, renderer->esurface);
}
void wayc_renderer_deinit(struct renderer_s* renderer) {
wayc_notnull(renderer);
if (renderer->graphics == nullptr || renderer->esurface == nullptr ||
renderer->ewindow == nullptr)
return;
sg_shutdown();
eglDestroySurface(renderer->graphics->display, renderer->esurface);
wl_egl_window_destroy(renderer->ewindow);
renderer->graphics = nullptr;
renderer->esurface = nullptr;
renderer->ewindow = nullptr;
}
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