diff options
Diffstat (limited to 'render/egl.c')
| -rw-r--r-- | render/egl.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/render/egl.c b/render/egl.c new file mode 100644 index 00000000..73680d1d --- /dev/null +++ b/render/egl.c @@ -0,0 +1,243 @@ +#include <EGL/egl.h> +#include <EGL/eglext.h> +#include <GLES2/gl2.h> +#include <gbm.h> // GBM_FORMAT_XRGB8888 +#include <stdlib.h> +#include <wlr/util/log.h> +#include <wlr/egl.h> + +// Extension documentation +// https://www.khronos.org/registry/EGL/extensions/KHR/EGL_KHR_image_base.txt. +// https://cgit.freedesktop.org/mesa/mesa/tree/docs/specs/WL_bind_wayland_display.spec + +const char *egl_error(void) { + switch (eglGetError()) { + case EGL_SUCCESS: + return "Success"; + case EGL_NOT_INITIALIZED: + return "Not initialized"; + case EGL_BAD_ACCESS: + return "Bad access"; + case EGL_BAD_ALLOC: + return "Bad alloc"; + case EGL_BAD_ATTRIBUTE: + return "Bad attribute"; + case EGL_BAD_CONTEXT: + return "Bad Context"; + case EGL_BAD_CONFIG: + return "Bad Config"; + case EGL_BAD_CURRENT_SURFACE: + return "Bad current surface"; + case EGL_BAD_DISPLAY: + return "Bad display"; + case EGL_BAD_SURFACE: + return "Bad surface"; + case EGL_BAD_MATCH: + return "Bad match"; + case EGL_BAD_PARAMETER: + return "Bad parameter"; + case EGL_BAD_NATIVE_PIXMAP: + return "Bad native pixmap"; + case EGL_BAD_NATIVE_WINDOW: + return "Bad native window"; + case EGL_CONTEXT_LOST: + return "Context lost"; + default: + return "Unknown"; + } +} + +static bool egl_exts(struct wlr_egl *egl) { + egl->get_platform_display = (PFNEGLGETPLATFORMDISPLAYEXTPROC) + eglGetProcAddress("eglGetPlatformDisplayEXT"); + + if (!egl->get_platform_display) { + wlr_log(L_ERROR, "Failed to load EGL extension 'eglGetPlatformDisplayEXT'"); + return false; + } + + egl->create_platform_window_surface = (PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC) + eglGetProcAddress("eglCreatePlatformWindowSurfaceEXT"); + + if (!egl->get_platform_display) { + wlr_log(L_ERROR, + "Failed to load EGL extension 'eglCreatePlatformWindowSurfaceEXT'"); + return false; + } + + return true; +} + +static bool egl_get_config(EGLDisplay disp, EGLConfig *out, EGLenum platform) { + EGLint count = 0, matched = 0, ret; + + ret = eglGetConfigs(disp, NULL, 0, &count); + if (ret == EGL_FALSE || count == 0) { + wlr_log(L_ERROR, "eglGetConfigs returned no configs"); + return false; + } + + EGLConfig configs[count]; + + ret = eglChooseConfig(disp, NULL, configs, count, &matched); + if (ret == EGL_FALSE) { + wlr_log(L_ERROR, "eglChooseConfig failed"); + return false; + } + + for (int i = 0; i < matched; ++i) { + EGLint gbm_format; + + if (platform == EGL_PLATFORM_WAYLAND_EXT) { + *out = configs[i]; + return true; + } + + if (!eglGetConfigAttrib(disp, + configs[i], + EGL_NATIVE_VISUAL_ID, + &gbm_format)) { + continue; + } + + if (gbm_format == GBM_FORMAT_ARGB8888) { + *out = configs[i]; + return true; + } + } + + wlr_log(L_ERROR, "no valid egl config found"); + return false; +} + +bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, + void *remote_display) { + if (!egl_exts(egl)) { + return false; + } + + if (eglBindAPI(EGL_OPENGL_ES_API) == EGL_FALSE) { + wlr_log(L_ERROR, "Failed to bind to the OpenGL ES API: %s", egl_error()); + goto error; + } + + egl->display = egl->get_platform_display(platform, remote_display, NULL); + if (egl->display == EGL_NO_DISPLAY) { + wlr_log(L_ERROR, "Failed to create EGL display: %s", egl_error()); + goto error; + } + + EGLint major, minor; + if (eglInitialize(egl->display, &major, &minor) == EGL_FALSE) { + wlr_log(L_ERROR, "Failed to initialize EGL: %s", egl_error()); + goto error; + } + + if (!egl_get_config(egl->display, &egl->config, platform)) { + wlr_log(L_ERROR, "Failed to get EGL config"); + goto error; + } + + static const EGLint attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE}; + + egl->context = eglCreateContext(egl->display, egl->config, + EGL_NO_CONTEXT, attribs); + + if (egl->context == EGL_NO_CONTEXT) { + wlr_log(L_ERROR, "Failed to create EGL context: %s", egl_error()); + goto error; + } + + eglMakeCurrent(egl->display, EGL_NO_SURFACE, EGL_NO_SURFACE, egl->context); + egl->egl_exts = eglQueryString(egl->display, EGL_EXTENSIONS); + if (strstr(egl->egl_exts, "EGL_WL_bind_wayland_display") == NULL || + strstr(egl->egl_exts, "EGL_KHR_image_base") == NULL) { + wlr_log(L_ERROR, "Required egl extensions not supported"); + goto error; + } + + egl->eglCreateImageKHR = (PFNEGLCREATEIMAGEKHRPROC) + eglGetProcAddress("eglCreateImageKHR"); + egl->eglDestroyImageKHR = (PFNEGLDESTROYIMAGEKHRPROC) + eglGetProcAddress("eglDestroyImageKHR"); + egl->eglQueryWaylandBufferWL = (PFNEGLQUERYWAYLANDBUFFERWL) + (void*) eglGetProcAddress("eglQueryWaylandBufferWL"); + egl->eglBindWaylandDisplayWL = (PFNEGLBINDWAYLANDDISPLAYWL) + (void*) eglGetProcAddress("eglBindWaylandDisplayWL"); + egl->eglUnbindWaylandDisplayWL = (PFNEGLUNBINDWAYLANDDISPLAYWL) + (void*) eglGetProcAddress("eglUnbindWaylandDisplayWL"); + + egl->gl_exts = (const char*) glGetString(GL_EXTENSIONS); + wlr_log(L_INFO, "Using EGL %d.%d", (int)major, (int)minor); + wlr_log(L_INFO, "Supported EGL extensions: %s", egl->egl_exts); + wlr_log(L_INFO, "Using %s", glGetString(GL_VERSION)); + wlr_log(L_INFO, "Supported OpenGL ES extensions: %s", egl->gl_exts); + return true; + +error: + eglTerminate(egl->display); + eglReleaseThread(); + eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); + return false; +} + +void wlr_egl_free(struct wlr_egl *egl) { + if (egl->wl_display && egl->eglUnbindWaylandDisplayWL) { + egl->eglUnbindWaylandDisplayWL(egl->display, egl->wl_display); + } + + eglDestroyContext(egl->display, egl->context); + eglTerminate(egl->display); + eglReleaseThread(); + eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); +} + +bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display) { + if (!egl->eglBindWaylandDisplayWL) { + return false; + } + + if (egl->eglBindWaylandDisplayWL(egl->display, local_display)) { + egl->wl_display = local_display; + return true; + } + + return false; +} + +bool wlr_egl_query_buffer(struct wlr_egl *egl, struct wl_resource *buf, + int attrib, int *value) { + if (!egl->eglQueryWaylandBufferWL) { + return false; + } + return egl->eglQueryWaylandBufferWL(egl->display, buf, attrib, value); +} + +EGLImage wlr_egl_create_image(struct wlr_egl *egl, EGLenum target, + EGLClientBuffer buffer, const EGLint *attribs) { + if (!egl->eglCreateImageKHR) { + return false; + } + + return egl->eglCreateImageKHR(egl->display, egl->context, target, + buffer, attribs); +} + +bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImage image) { + if (!egl->eglDestroyImageKHR) { + return false; + } + + egl->eglDestroyImageKHR(egl->display, image); + return true; +} + +EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window) { + EGLSurface surf = egl->create_platform_window_surface(egl->display, egl->config, + window, NULL); + if (surf == EGL_NO_SURFACE) { + wlr_log(L_ERROR, "Failed to create EGL surface: %s", egl_error()); + return EGL_NO_SURFACE; + } + return surf; +} |