wlroots/render/egl.c

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#include <assert.h>
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#include <EGL/egl.h>
#include <EGL/eglext.h>
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#include <GLES2/gl2.h>
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#include <stdlib.h>
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#include <wlr/render/egl.h>
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#include <wlr/util/log.h>
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#include "glapi.h"
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// 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) {
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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_get_config(EGLDisplay disp, EGLint *attribs, EGLConfig *out,
EGLint visual_id) {
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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");
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return false;
}
EGLConfig configs[count];
ret = eglChooseConfig(disp, attribs, configs, count, &matched);
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if (ret == EGL_FALSE) {
wlr_log(L_ERROR, "eglChooseConfig failed");
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return false;
}
for (int i = 0; i < matched; ++i) {
EGLint visual;
if (!eglGetConfigAttrib(disp, configs[i],
EGL_NATIVE_VISUAL_ID, &visual)) {
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continue;
}
if (!visual_id || visual == visual_id) {
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*out = configs[i];
return true;
}
}
wlr_log(L_ERROR, "no valid egl config found");
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return false;
}
static bool check_egl_ext(const char *egl_exts, const char *ext) {
size_t extlen = strlen(ext);
const char *end = egl_exts + strlen(egl_exts);
while (egl_exts < end) {
if (*egl_exts == ' ') {
egl_exts++;
continue;
}
size_t n = strcspn(egl_exts, " ");
if (n == extlen && strncmp(ext, egl_exts, n) == 0) {
return true;
}
egl_exts += n;
}
return false;
}
bool wlr_egl_init(struct wlr_egl *egl, EGLenum platform, void *remote_display,
EGLint *config_attribs, EGLint visual_id) {
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if (!load_glapi()) {
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return false;
}
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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;
}
if (platform == EGL_PLATFORM_SURFACELESS_MESA) {
assert(remote_display == NULL);
egl->display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
} else {
egl->display = eglGetPlatformDisplayEXT(platform, remote_display, NULL);
}
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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) {
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wlr_log(L_ERROR, "Failed to initialize EGL: %s", egl_error());
goto error;
}
if (!egl_get_config(egl->display, config_attribs, &egl->config, visual_id)) {
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wlr_log(L_ERROR, "Failed to get EGL config");
goto error;
}
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static const EGLint attribs[] = {EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE};
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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_str = eglQueryString(egl->display, EGL_EXTENSIONS);
egl->gl_exts_str = (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_str);
wlr_log(L_INFO, "EGL vendor: %s", eglQueryString(egl->display, EGL_VENDOR));
wlr_log(L_INFO, "Using %s", glGetString(GL_VERSION));
wlr_log(L_INFO, "GL vendor: %s", glGetString(GL_VENDOR));
wlr_log(L_INFO, "Supported OpenGL ES extensions: %s", egl->gl_exts_str);
if (!check_egl_ext(egl->egl_exts_str, "EGL_WL_bind_wayland_display") ||
!check_egl_ext(egl->egl_exts_str, "EGL_KHR_image_base")) {
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wlr_log(L_ERROR, "Required egl extensions not supported");
goto error;
}
egl->egl_exts.buffer_age =
check_egl_ext(egl->egl_exts_str, "EGL_EXT_buffer_age");
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egl->egl_exts.swap_buffers_with_damage =
check_egl_ext(egl->egl_exts_str, "EGL_EXT_swap_buffers_with_damage") ||
check_egl_ext(egl->egl_exts_str, "EGL_KHR_swap_buffers_with_damage");
egl->egl_exts.dmabuf_import =
check_egl_ext(egl->egl_exts_str, "EGL_EXT_image_dma_buf_import");
egl->egl_exts.dmabuf_import_modifiers =
check_egl_ext(egl->egl_exts_str, "EGL_EXT_image_dma_buf_import_modifiers")
&& eglQueryDmaBufFormatsEXT && eglQueryDmaBufModifiersEXT;
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return true;
error:
eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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eglTerminate(egl->display);
eglReleaseThread();
return false;
}
void wlr_egl_finish(struct wlr_egl *egl) {
eglMakeCurrent(EGL_NO_DISPLAY, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
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if (egl->wl_display && eglUnbindWaylandDisplayWL) {
eglUnbindWaylandDisplayWL(egl->display, egl->wl_display);
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}
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eglDestroyContext(egl->display, egl->context);
eglTerminate(egl->display);
eglReleaseThread();
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}
bool wlr_egl_bind_display(struct wlr_egl *egl, struct wl_display *local_display) {
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if (!eglBindWaylandDisplayWL) {
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return false;
}
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if (eglBindWaylandDisplayWL(egl->display, local_display)) {
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egl->wl_display = local_display;
return true;
}
return false;
}
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bool wlr_egl_query_buffer(struct wlr_egl *egl, struct wl_resource *buf,
int attrib, int *value) {
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if (!eglQueryWaylandBufferWL) {
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return false;
}
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return eglQueryWaylandBufferWL(egl->display, buf, attrib, value);
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}
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EGLImage wlr_egl_create_image(struct wlr_egl *egl, EGLenum target,
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EGLClientBuffer buffer, const EGLint *attribs) {
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if (!eglCreateImageKHR) {
return NULL;
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}
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return eglCreateImageKHR(egl->display, egl->context, target,
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buffer, attribs);
}
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bool wlr_egl_destroy_image(struct wlr_egl *egl, EGLImage image) {
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if (!eglDestroyImageKHR) {
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return false;
}
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eglDestroyImageKHR(egl->display, image);
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return true;
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}
EGLSurface wlr_egl_create_surface(struct wlr_egl *egl, void *window) {
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EGLSurface surf = eglCreatePlatformWindowSurfaceEXT(egl->display, egl->config,
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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;
}
int wlr_egl_get_buffer_age(struct wlr_egl *egl, EGLSurface surface) {
if (!egl->egl_exts.buffer_age) {
return -1;
}
EGLint buffer_age;
EGLBoolean ok = eglQuerySurface(egl->display, surface,
EGL_BUFFER_AGE_EXT, &buffer_age);
if (!ok) {
wlr_log(L_ERROR, "Failed to get EGL surface buffer age: %s", egl_error());
return -1;
}
return buffer_age;
}
bool wlr_egl_make_current(struct wlr_egl *egl, EGLSurface surface,
int *buffer_age) {
if (!eglMakeCurrent(egl->display, surface, surface, egl->context)) {
wlr_log(L_ERROR, "eglMakeCurrent failed: %s", egl_error());
return false;
}
if (buffer_age != NULL) {
*buffer_age = wlr_egl_get_buffer_age(egl, surface);
}
return true;
}
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bool wlr_egl_swap_buffers(struct wlr_egl *egl, EGLSurface surface,
pixman_region32_t *damage) {
EGLBoolean ret;
if (damage != NULL && egl->egl_exts.swap_buffers_with_damage) {
int nrects;
pixman_box32_t *rects =
pixman_region32_rectangles(damage, &nrects);
EGLint egl_damage[4 * nrects];
for (int i = 0; i < nrects; ++i) {
egl_damage[4*i] = rects[i].x1;
egl_damage[4*i + 1] = rects[i].y1;
egl_damage[4*i + 2] = rects[i].x2 - rects[i].x1;
egl_damage[4*i + 3] = rects[i].y2 - rects[i].y1;
}
assert(eglSwapBuffersWithDamageEXT || eglSwapBuffersWithDamageKHR);
if (eglSwapBuffersWithDamageEXT) {
ret = eglSwapBuffersWithDamageEXT(egl->display, surface, egl_damage,
nrects);
} else {
ret = eglSwapBuffersWithDamageKHR(egl->display, surface, egl_damage,
nrects);
}
} else {
ret = eglSwapBuffers(egl->display, surface);
}
if (!ret) {
wlr_log(L_ERROR, "eglSwapBuffers failed: %s", egl_error());
return false;
}
return true;
}
EGLImage wlr_egl_create_image_from_dmabuf(struct wlr_egl *egl,
struct wlr_dmabuf_buffer_attribs *attributes) {
int atti = 0;
EGLint attribs[20];
attribs[atti++] = EGL_WIDTH;
attribs[atti++] = attributes->width;
attribs[atti++] = EGL_HEIGHT;
attribs[atti++] = attributes->height;
attribs[atti++] = EGL_LINUX_DRM_FOURCC_EXT;
attribs[atti++] = attributes->format;
bool has_modifier = false;
if (attributes->modifier[0] != DRM_FORMAT_MOD_INVALID) {
if (!egl->egl_exts.dmabuf_import_modifiers) {
return NULL;
}
has_modifier = true;
}
/* TODO: YUV planes have up four planes but we only support a
single EGLImage for now */
if (attributes->n_planes > 1) {
return NULL;
}
attribs[atti++] = EGL_DMA_BUF_PLANE0_FD_EXT;
attribs[atti++] = attributes->fd[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
attribs[atti++] = attributes->offset[0];
attribs[atti++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
attribs[atti++] = attributes->stride[0];
if (has_modifier) {
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
attribs[atti++] = attributes->modifier[0] & 0xFFFFFFFF;
attribs[atti++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
attribs[atti++] = attributes->modifier[0] >> 32;
}
attribs[atti++] = EGL_NONE;
return eglCreateImageKHR(egl->display, EGL_NO_CONTEXT,
EGL_LINUX_DMA_BUF_EXT, NULL, attribs);
}
#ifndef DRM_FORMAT_BIG_ENDIAN
# define DRM_FORMAT_BIG_ENDIAN 0x80000000
#endif
bool wlr_egl_check_import_dmabuf(struct wlr_egl *egl,
struct wlr_dmabuf_buffer *dmabuf) {
switch (dmabuf->attributes.format & ~DRM_FORMAT_BIG_ENDIAN) {
/* YUV based formats not yet supported */
case WL_SHM_FORMAT_YUYV:
case WL_SHM_FORMAT_YVYU:
case WL_SHM_FORMAT_UYVY:
case WL_SHM_FORMAT_VYUY:
case WL_SHM_FORMAT_AYUV:
return false;
default:
break;
}
EGLImage egl_image = wlr_egl_create_image_from_dmabuf(egl,
&dmabuf->attributes);
if (egl_image) {
/* We can import the image, good. No need to keep it
since wlr_texture_upload_dmabuf will import it again */
wlr_egl_destroy_image(egl, egl_image);
return true;
}
/* TODO: import yuv dmabufs */
return false;
}
int wlr_egl_get_dmabuf_formats(struct wlr_egl *egl,
int **formats) {
if (!egl->egl_exts.dmabuf_import ||
!egl->egl_exts.dmabuf_import_modifiers) {
wlr_log(L_ERROR, "dmabuf extension not present");
return -1;
}
EGLint num;
if (!eglQueryDmaBufFormatsEXT(egl->display, 0, NULL, &num)) {
wlr_log(L_ERROR, "failed to query number of dmabuf formats");
return -1;
}
*formats = calloc(num, sizeof(int));
if (*formats == NULL) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return -1;
}
if (!eglQueryDmaBufFormatsEXT(egl->display, num, *formats, &num)) {
wlr_log(L_ERROR, "failed to query dmabuf format");
free(*formats);
return -1;
}
return num;
}
int wlr_egl_get_dmabuf_modifiers(struct wlr_egl *egl,
int format, uint64_t **modifiers) {
if (!egl->egl_exts.dmabuf_import ||
!egl->egl_exts.dmabuf_import_modifiers) {
wlr_log(L_ERROR, "dmabuf extension not present");
return -1;
}
EGLint num;
if (!eglQueryDmaBufModifiersEXT(egl->display, format, 0,
NULL, NULL, &num)) {
wlr_log(L_ERROR, "failed to query dmabuf number of modifiers");
return -1;
}
*modifiers = calloc(num, sizeof(uint64_t));
if (*modifiers == NULL) {
wlr_log(L_ERROR, "Allocation failed: %s", strerror(errno));
return -1;
}
if (!eglQueryDmaBufModifiersEXT(egl->display, format, num,
*modifiers, NULL, &num)) {
wlr_log(L_ERROR, "failed to query dmabuf modifiers");
free(*modifiers);
return -1;
}
return num;
}