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afe8e0b6db
qemu/ui/egl-helpers.c
Marc-André Lureau afe8e0b6db ui/egl: default to GLES on windows 
Windows GL drivers are notoriously not very good. Otoh, ANGLE provides
rock solid GLES implementation on top of direct3d. We should recommend
it and default to ES when using EGL (users can easily override this if
necessary)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230606115658.677673-14-marcandre.lureau@redhat.com>
2023-06-27 17:08:56 +02:00

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/*
* Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/drm.h"
#include "qemu/error-report.h"
#include "ui/console.h"
#include "ui/egl-helpers.h"
#include "sysemu/sysemu.h"
#include "qapi/error.h"
EGLDisplay *qemu_egl_display;
EGLConfig qemu_egl_config;
DisplayGLMode qemu_egl_mode;
/* ------------------------------------------------------------------ */
const char *qemu_egl_get_error_string(void)
{
EGLint error = eglGetError();
switch (error) {
case EGL_SUCCESS:
return "EGL_SUCCESS";
case EGL_NOT_INITIALIZED:
return "EGL_NOT_INITIALIZED";
case EGL_BAD_ACCESS:
return "EGL_BAD_ACCESS";
case EGL_BAD_ALLOC:
return "EGL_BAD_ALLOC";
case EGL_BAD_ATTRIBUTE:
return "EGL_BAD_ATTRIBUTE";
case EGL_BAD_CONTEXT:
return "EGL_BAD_CONTEXT";
case EGL_BAD_CONFIG:
return "EGL_BAD_CONFIG";
case EGL_BAD_CURRENT_SURFACE:
return "EGL_BAD_CURRENT_SURFACE";
case EGL_BAD_DISPLAY:
return "EGL_BAD_DISPLAY";
case EGL_BAD_SURFACE:
return "EGL_BAD_SURFACE";
case EGL_BAD_MATCH:
return "EGL_BAD_MATCH";
case EGL_BAD_PARAMETER:
return "EGL_BAD_PARAMETER";
case EGL_BAD_NATIVE_PIXMAP:
return "EGL_BAD_NATIVE_PIXMAP";
case EGL_BAD_NATIVE_WINDOW:
return "EGL_BAD_NATIVE_WINDOW";
case EGL_CONTEXT_LOST:
return "EGL_CONTEXT_LOST";
default:
return "Unknown EGL error";
}
}
static void egl_fb_delete_texture(egl_fb *fb)
{
if (!fb->delete_texture) {
return;
}
glDeleteTextures(1, &fb->texture);
fb->delete_texture = false;
}
void egl_fb_destroy(egl_fb *fb)
{
if (!fb->framebuffer) {
return;
}
egl_fb_delete_texture(fb);
glDeleteFramebuffers(1, &fb->framebuffer);
fb->width = 0;
fb->height = 0;
fb->texture = 0;
fb->framebuffer = 0;
}
void egl_fb_setup_default(egl_fb *fb, int width, int height)
{
fb->width = width;
fb->height = height;
fb->framebuffer = 0; /* default framebuffer */
}
void egl_fb_setup_for_tex(egl_fb *fb, int width, int height,
GLuint texture, bool delete)
{
egl_fb_delete_texture(fb);
fb->width = width;
fb->height = height;
fb->texture = texture;
fb->delete_texture = delete;
if (!fb->framebuffer) {
glGenFramebuffers(1, &fb->framebuffer);
}
glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, fb->texture, 0);
}
void egl_fb_setup_new_tex(egl_fb *fb, int width, int height)
{
GLuint texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height,
0, GL_BGRA, GL_UNSIGNED_BYTE, 0);
egl_fb_setup_for_tex(fb, width, height, texture, true);
}
void egl_fb_blit(egl_fb *dst, egl_fb *src, bool flip)
{
GLuint x1 = 0;
GLuint y1 = 0;
GLuint x2, y2;
GLuint w = src->width;
GLuint h = src->height;
glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
glViewport(0, 0, dst->width, dst->height);
if (src->dmabuf) {
x1 = src->dmabuf->x;
y1 = src->dmabuf->y;
w = src->dmabuf->scanout_width;
h = src->dmabuf->scanout_height;
}
w = (x1 + w) > src->width ? src->width - x1 : w;
h = (y1 + h) > src->height ? src->height - y1 : h;
y2 = flip ? y1 : h + y1;
y1 = flip ? h + y1 : y1;
x2 = x1 + w;
glBlitFramebuffer(x1, y1, x2, y2,
0, 0, dst->width, dst->height,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
}
void egl_fb_read(DisplaySurface *dst, egl_fb *src)
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
glReadPixels(0, 0, surface_width(dst), surface_height(dst),
GL_BGRA, GL_UNSIGNED_BYTE, surface_data(dst));
}
void egl_texture_blit(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip)
{
glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
glViewport(0, 0, dst->width, dst->height);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, src->texture);
qemu_gl_run_texture_blit(gls, flip);
}
void egl_texture_blend(QemuGLShader *gls, egl_fb *dst, egl_fb *src, bool flip,
int x, int y, double scale_x, double scale_y)
{
glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
int w = scale_x * src->width;
int h = scale_y * src->height;
if (flip) {
glViewport(x, y, w, h);
} else {
glViewport(x, dst->height - h - y, w, h);
}
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, src->texture);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
qemu_gl_run_texture_blit(gls, flip);
glDisable(GL_BLEND);
}
/* ---------------------------------------------------------------------- */
EGLContext qemu_egl_rn_ctx;
#ifdef CONFIG_GBM
int qemu_egl_rn_fd;
struct gbm_device *qemu_egl_rn_gbm_dev;
int egl_rendernode_init(const char *rendernode, DisplayGLMode mode)
{
qemu_egl_rn_fd = -1;
int rc;
qemu_egl_rn_fd = qemu_drm_rendernode_open(rendernode);
if (qemu_egl_rn_fd == -1) {
error_report("egl: no drm render node available");
goto err;
}
qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
if (!qemu_egl_rn_gbm_dev) {
error_report("egl: gbm_create_device failed");
goto err;
}
rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev,
mode);
if (rc != 0) {
/* qemu_egl_init_dpy_mesa reports error */
goto err;
}
if (!epoxy_has_egl_extension(qemu_egl_display,
"EGL_KHR_surfaceless_context")) {
error_report("egl: EGL_KHR_surfaceless_context not supported");
goto err;
}
if (!epoxy_has_egl_extension(qemu_egl_display,
"EGL_MESA_image_dma_buf_export")) {
error_report("egl: EGL_MESA_image_dma_buf_export not supported");
goto err;
}
qemu_egl_rn_ctx = qemu_egl_init_ctx();
if (!qemu_egl_rn_ctx) {
error_report("egl: egl_init_ctx failed");
goto err;
}
return 0;
err:
if (qemu_egl_rn_gbm_dev) {
gbm_device_destroy(qemu_egl_rn_gbm_dev);
}
if (qemu_egl_rn_fd != -1) {
close(qemu_egl_rn_fd);
}
return -1;
}
int egl_get_fd_for_texture(uint32_t tex_id, EGLint *stride, EGLint *fourcc,
EGLuint64KHR *modifier)
{
EGLImageKHR image;
EGLint num_planes, fd;
image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
EGL_GL_TEXTURE_2D_KHR,
(EGLClientBuffer)(unsigned long)tex_id,
NULL);
if (!image) {
return -1;
}
eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
&num_planes, modifier);
if (num_planes != 1) {
eglDestroyImageKHR(qemu_egl_display, image);
return -1;
}
eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
eglDestroyImageKHR(qemu_egl_display, image);
return fd;
}
void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
{
EGLImageKHR image = EGL_NO_IMAGE_KHR;
EGLint attrs[64];
int i = 0;
if (dmabuf->texture != 0) {
return;
}
attrs[i++] = EGL_WIDTH;
attrs[i++] = dmabuf->width;
attrs[i++] = EGL_HEIGHT;
attrs[i++] = dmabuf->height;
attrs[i++] = EGL_LINUX_DRM_FOURCC_EXT;
attrs[i++] = dmabuf->fourcc;
attrs[i++] = EGL_DMA_BUF_PLANE0_FD_EXT;
attrs[i++] = dmabuf->fd;
attrs[i++] = EGL_DMA_BUF_PLANE0_PITCH_EXT;
attrs[i++] = dmabuf->stride;
attrs[i++] = EGL_DMA_BUF_PLANE0_OFFSET_EXT;
attrs[i++] = 0;
#ifdef EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT
if (dmabuf->modifier) {
attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_LO_EXT;
attrs[i++] = (dmabuf->modifier >> 0) & 0xffffffff;
attrs[i++] = EGL_DMA_BUF_PLANE0_MODIFIER_HI_EXT;
attrs[i++] = (dmabuf->modifier >> 32) & 0xffffffff;
}
#endif
attrs[i++] = EGL_NONE;
image = eglCreateImageKHR(qemu_egl_display,
EGL_NO_CONTEXT,
EGL_LINUX_DMA_BUF_EXT,
NULL, attrs);
if (image == EGL_NO_IMAGE_KHR) {
error_report("eglCreateImageKHR failed");
return;
}
glGenTextures(1, &dmabuf->texture);
glBindTexture(GL_TEXTURE_2D, dmabuf->texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
eglDestroyImageKHR(qemu_egl_display, image);
}
void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)
{
if (dmabuf->texture == 0) {
return;
}
glDeleteTextures(1, &dmabuf->texture);
dmabuf->texture = 0;
}
void egl_dmabuf_create_sync(QemuDmaBuf *dmabuf)
{
EGLSyncKHR sync;
if (epoxy_has_egl_extension(qemu_egl_display,
"EGL_KHR_fence_sync") &&
epoxy_has_egl_extension(qemu_egl_display,
"EGL_ANDROID_native_fence_sync")) {
sync = eglCreateSyncKHR(qemu_egl_display,
EGL_SYNC_NATIVE_FENCE_ANDROID, NULL);
if (sync != EGL_NO_SYNC_KHR) {
dmabuf->sync = sync;
}
}
}
void egl_dmabuf_create_fence(QemuDmaBuf *dmabuf)
{
if (dmabuf->sync) {
dmabuf->fence_fd = eglDupNativeFenceFDANDROID(qemu_egl_display,
dmabuf->sync);
eglDestroySyncKHR(qemu_egl_display, dmabuf->sync);
dmabuf->sync = NULL;
}
}
#endif /* CONFIG_GBM */
/* ---------------------------------------------------------------------- */
EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win)
{
EGLSurface esurface;
EGLBoolean b;
esurface = eglCreateWindowSurface(qemu_egl_display,
qemu_egl_config,
win, NULL);
if (esurface == EGL_NO_SURFACE) {
error_report("egl: eglCreateWindowSurface failed");
return NULL;
}
b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
if (b == EGL_FALSE) {
error_report("egl: eglMakeCurrent failed");
return NULL;
}
return esurface;
}
/* ---------------------------------------------------------------------- */
#if defined(CONFIG_X11) || defined(CONFIG_GBM) || defined(WIN32)
/*
* Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed
*
* Create an EGLDisplay from a native display type. This is a little quirky
* for a few reasons.
*
* 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to
* use, but have different function signatures in the third argument; this
* happens not to matter for us, at the moment, but it means epoxy won't alias
* them together.
*
* 2: epoxy 1.3 and earlier don't understand EGL client extensions, which
* means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver
* will crash.
*
* 3: You can't tell whether you have EGL 1.5 at this point, because
* eglQueryString(EGL_VERSION) is a property of the display, which we don't
* have yet. So you have to query for extensions no matter what. Fortunately
* epoxy_has_egl_extension _does_ let you query for client extensions, so
* we don't have to write our own extension string parsing.
*
* 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one
* needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay
* function pointer.
* We can workaround this (circular dependency) by probing for the EGL 1.5
* platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem
* like mesa will be able to advertise these (even though it can do EGL 1.5).
*/
static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native,
EGLenum platform)
{
EGLDisplay dpy = EGL_NO_DISPLAY;
/* In practise any EGL 1.5 implementation would support the EXT extension */
if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
if (platform != 0) {
dpy = eglGetPlatformDisplayEXT(platform, native, NULL);
}
}
if (dpy == EGL_NO_DISPLAY) {
/* fallback */
dpy = eglGetDisplay(native);
}
return dpy;
}
static int qemu_egl_init_dpy(EGLNativeDisplayType dpy,
EGLenum platform,
DisplayGLMode mode)
{
static const EGLint conf_att_core[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_RED_SIZE, 5,
EGL_GREEN_SIZE, 5,
EGL_BLUE_SIZE, 5,
EGL_ALPHA_SIZE, 0,
EGL_NONE,
};
static const EGLint conf_att_gles[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_RED_SIZE, 5,
EGL_GREEN_SIZE, 5,
EGL_BLUE_SIZE, 5,
EGL_ALPHA_SIZE, 0,
EGL_NONE,
};
EGLint major, minor;
EGLBoolean b;
EGLint n;
bool gles = (mode == DISPLAYGL_MODE_ES);
qemu_egl_display = qemu_egl_get_display(dpy, platform);
if (qemu_egl_display == EGL_NO_DISPLAY) {
error_report("egl: eglGetDisplay failed: %s", qemu_egl_get_error_string());
return -1;
}
b = eglInitialize(qemu_egl_display, &major, &minor);
if (b == EGL_FALSE) {
error_report("egl: eglInitialize failed: %s", qemu_egl_get_error_string());
return -1;
}
b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
if (b == EGL_FALSE) {
error_report("egl: eglBindAPI failed (%s mode): %s",
gles ? "gles" : "core", qemu_egl_get_error_string());
return -1;
}
b = eglChooseConfig(qemu_egl_display,
gles ? conf_att_gles : conf_att_core,
&qemu_egl_config, 1, &n);
if (b == EGL_FALSE || n != 1) {
error_report("egl: eglChooseConfig failed (%s mode): %s",
gles ? "gles" : "core", qemu_egl_get_error_string());
return -1;
}
qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE;
return 0;
}
#endif
#if defined(CONFIG_X11) || defined(CONFIG_GBM)
int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode)
{
#ifdef EGL_KHR_platform_x11
return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR, mode);
#else
return qemu_egl_init_dpy(dpy, 0, mode);
#endif
}
int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode)
{
#ifdef EGL_MESA_platform_gbm
return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA, mode);
#else
return qemu_egl_init_dpy(dpy, 0, mode);
#endif
}
#endif
#ifdef WIN32
int qemu_egl_init_dpy_win32(EGLNativeDisplayType dpy, DisplayGLMode mode)
{
/* prefer GL ES, as that's what ANGLE supports */
if (mode == DISPLAYGL_MODE_ON) {
mode = DISPLAYGL_MODE_ES;
}
return qemu_egl_init_dpy(dpy, 0, mode);
}
#endif
bool qemu_egl_has_dmabuf(void)
{
if (qemu_egl_display == EGL_NO_DISPLAY) {
return false;
}
return epoxy_has_egl_extension(qemu_egl_display,
"EGL_EXT_image_dma_buf_import");
}
EGLContext qemu_egl_init_ctx(void)
{
static const EGLint ctx_att_core[] = {
EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
EGL_NONE
};
static const EGLint ctx_att_gles[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
bool gles = (qemu_egl_mode == DISPLAYGL_MODE_ES);
EGLContext ectx;
EGLBoolean b;
ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
gles ? ctx_att_gles : ctx_att_core);
if (ectx == EGL_NO_CONTEXT) {
error_report("egl: eglCreateContext failed");
return NULL;
}
b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
if (b == EGL_FALSE) {
error_report("egl: eglMakeCurrent failed");
return NULL;
}
return ectx;
}
bool egl_init(const char *rendernode, DisplayGLMode mode, Error **errp)
{
ERRP_GUARD();
if (mode == DISPLAYGL_MODE_OFF) {
error_setg(errp, "egl: turning off GL doesn't make sense");
return false;
}
#ifdef WIN32
if (qemu_egl_init_dpy_win32(EGL_DEFAULT_DISPLAY, mode) < 0) {
error_setg(errp, "egl: init failed");
return false;
}
qemu_egl_rn_ctx = qemu_egl_init_ctx();
if (!qemu_egl_rn_ctx) {
error_setg(errp, "egl: egl_init_ctx failed");
return false;
}
#elif defined(CONFIG_GBM)
if (egl_rendernode_init(rendernode, mode) < 0) {
error_setg(errp, "egl: render node init failed");
return false;
}
#endif
if (!qemu_egl_rn_ctx) {
error_setg(errp, "egl: not available on this platform");
return false;
}
display_opengl = 1;
return true;
}
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