180 lines
4.6 KiB
C
180 lines
4.6 KiB
C
#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <GLES3/gl3.h>
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#include <gbm.h> // GBM_FORMAT_XRGB8888
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#include <wlr/util/log.h>
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#include "backend/egl.h"
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const char *egl_error(void) {
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switch (eglGetError()) {
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case EGL_SUCCESS:
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return "Success";
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case EGL_NOT_INITIALIZED:
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return "Not initialized";
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case EGL_BAD_ACCESS:
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return "Bad access";
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case EGL_BAD_ALLOC:
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return "Bad alloc";
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case EGL_BAD_ATTRIBUTE:
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return "Bad attribute";
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case EGL_BAD_CONTEXT:
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return "Bad Context";
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case EGL_BAD_CONFIG:
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return "Bad Config";
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case EGL_BAD_CURRENT_SURFACE:
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return "Bad current surface";
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case EGL_BAD_DISPLAY:
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return "Bad display";
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case EGL_BAD_SURFACE:
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return "Bad surface";
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case EGL_BAD_MATCH:
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return "Bad match";
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case EGL_BAD_PARAMETER:
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return "Bad parameter";
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case EGL_BAD_NATIVE_PIXMAP:
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return "Bad native pixmap";
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case EGL_BAD_NATIVE_WINDOW:
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return "Bad native window";
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case EGL_CONTEXT_LOST:
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return "Context lost";
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default:
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return "Unknown";
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}
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}
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// EGL extensions
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PFNEGLGETPLATFORMDISPLAYEXTPROC get_platform_display;
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PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC create_platform_window_surface;
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static bool egl_exts() {
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get_platform_display = (PFNEGLGETPLATFORMDISPLAYEXTPROC)
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eglGetProcAddress("eglGetPlatformDisplayEXT");
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if (!get_platform_display) {
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wlr_log(L_ERROR, "Failed to load EGL extension 'eglGetPlatformDisplayEXT'");
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return false;
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}
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create_platform_window_surface = (PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC)
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eglGetProcAddress("eglCreatePlatformWindowSurfaceEXT");
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if (!get_platform_display) {
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wlr_log(L_ERROR,
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"Failed to load EGL extension 'eglCreatePlatformWindowSurfaceEXT'");
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return false;
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}
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return true;
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}
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static bool egl_get_config(EGLDisplay disp, EGLConfig *out, EGLenum platform) {
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EGLint count = 0, matched = 0, ret;
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ret = eglGetConfigs(disp, NULL, 0, &count);
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if (ret == EGL_FALSE || count == 0) {
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wlr_log(L_ERROR, "eglGetConfigs returned no configs");
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return false;
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}
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EGLConfig configs[count];
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ret = eglChooseConfig(disp, NULL, configs, count, &matched);
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if (ret == EGL_FALSE) {
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wlr_log(L_ERROR, "eglChooseConfig failed");
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return false;
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}
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for (int i = 0; i < matched; ++i) {
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EGLint gbm_format;
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if (platform == EGL_PLATFORM_WAYLAND_EXT) {
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*out = configs[i];
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return true;
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}
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if (!eglGetConfigAttrib(disp,
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configs[i],
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EGL_NATIVE_VISUAL_ID,
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&gbm_format)) {
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continue;
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}
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if (gbm_format == GBM_FORMAT_XRGB8888) {
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*out = configs[i];
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return true;
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}
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}
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wlr_log(L_ERROR, "no valid egl config found");
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return false;
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}
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bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display) {
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if (!egl_exts()) {
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return false;
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}
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if (eglBindAPI(EGL_OPENGL_ES_API) == EGL_FALSE) {
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wlr_log(L_ERROR, "Failed to bind to the OpenGL ES API: %s", egl_error());
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goto error;
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}
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egl->display = get_platform_display(platform, display, NULL);
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if (egl->display == EGL_NO_DISPLAY) {
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wlr_log(L_ERROR, "Failed to create EGL display: %s", egl_error());
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goto error;
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}
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EGLint major, minor;
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if (eglInitialize(egl->display, &major, &minor) == EGL_FALSE) {
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wlr_log(L_ERROR, "Failed to initialize EGL: %s", egl_error());
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goto error;
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}
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if (!egl_get_config(egl->display, &egl->config, platform)) {
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wlr_log(L_ERROR, "Failed to get EGL config");
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goto error;
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}
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static const EGLint attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 3, EGL_NONE};
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egl->context = eglCreateContext(egl->display, egl->config,
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EGL_NO_CONTEXT, attribs);
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if (egl->context == EGL_NO_CONTEXT) {
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wlr_log(L_ERROR, "Failed to create EGL context: %s", egl_error());
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goto error;
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}
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eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE, egl->context);
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wlr_log(L_INFO, "Using EGL %d.%d", (int)major, (int)minor);
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wlr_log(L_INFO, "Supported EGL extensions: %s", eglQueryString(egl->display,
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EGL_EXTENSIONS));
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wlr_log(L_INFO, "Using %s", glGetString(GL_VERSION));
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wlr_log(L_INFO, "Supported OpenGL ES extensions: %s", glGetString(GL_EXTENSIONS));
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return true;
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error:
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eglTerminate(egl->display);
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eglReleaseThread();
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eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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return false;
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}
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void wlr_egl_free(struct wlr_egl *egl) {
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eglDestroyContext(egl->display, egl->context);
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eglTerminate(egl->display);
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eglReleaseThread();
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eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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}
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EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window) {
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EGLSurface surf = create_platform_window_surface(egl->display, egl->config,
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window, NULL);
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if (surf == EGL_NO_SURFACE) {
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wlr_log(L_ERROR, "Failed to create EGL surface: %s", egl_error());
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return EGL_NO_SURFACE;
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}
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return surf;
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}
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