Added EGL interface for backends.
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81998fdc98
commit
dbceaee9fa
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@ -12,6 +12,7 @@ add_library(wlr-backend
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drm/backend.c
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drm/drm.c
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drm/udev.c
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egl.c
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)
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target_link_libraries(wlr-backend
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@ -0,0 +1,169 @@
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <gbm.h> // GBM_FORMAT_XRGB8888
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#include "backend/egl.h"
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#include "common/log.h"
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static 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) {
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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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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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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 (!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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// XXX: Is GBM_FORMAT_XRGB8888 what we want?
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// I don't know if this works for wl_displays.
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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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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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if (eglInitialize(egl->display, NULL, NULL) == 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)) {
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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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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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@ -0,0 +1,17 @@
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#ifndef WLR_BACKEND_EGL_H
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#define WLR_BACKEND_EGL_H
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#include <EGL/egl.h>
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#include <stdbool.h>
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struct wlr_egl {
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EGLDisplay display;
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EGLConfig config;
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EGLContext context;
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};
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bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *display);
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void wlr_egl_free(struct wlr_egl *egl);
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EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window);
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#endif
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@ -1,6 +1,7 @@
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#ifndef _WLR_COMMON_LOG_H
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#define _WLR_COMMON_LOG_H
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#include <stdbool.h>
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#include <stdarg.h>
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typedef enum {
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L_SILENT = 0,
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@ -200,7 +200,7 @@ static struct wlr_session *logind_session_start(void) {
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if (!take_control(session))
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goto error_bus;
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wl_log(L_INFO, "Successfully loaded logind session");
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wlr_log(L_INFO, "Successfully loaded logind session");
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session->base.iface = session_logind_iface;
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return &session->base;
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