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qemu/ui/egl-helpers.c

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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"
EGLDisplay *qemu_egl_display;
EGLConfig qemu_egl_config;
DisplayGLMode qemu_egl_mode;
/* ------------------------------------------------------------------ */
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 y1, y2;
glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
glViewport(0, 0, dst->width, dst->height);
y1 = flip ? src->height : 0;
y2 = flip ? 0 : src->height;
glBlitFramebuffer(0, y1, src->width, y2,
0, 0, dst->width, dst->height,
GL_COLOR_BUFFER_BIT, GL_LINEAR);
}
void egl_fb_read(void *dst, egl_fb *src)
{
glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
glReadPixels(0, 0, src->width, src->height,
GL_BGRA, GL_UNSIGNED_BYTE, 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)
{
glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
if (flip) {
glViewport(x, y, src->width, src->height);
} else {
glViewport(x, dst->height - src->height - y,
src->width, src->height);
}
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);
}
/* ---------------------------------------------------------------------- */
#ifdef CONFIG_OPENGL_DMABUF
int qemu_egl_rn_fd;
struct gbm_device *qemu_egl_rn_gbm_dev;
EGLContext qemu_egl_rn_ctx;
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)
{
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, NULL);
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[] = {
EGL_DMA_BUF_PLANE0_FD_EXT, dmabuf->fd,
EGL_DMA_BUF_PLANE0_PITCH_EXT, dmabuf->stride,
EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
EGL_WIDTH, dmabuf->width,
EGL_HEIGHT, dmabuf->height,
EGL_LINUX_DRM_FOURCC_EXT, dmabuf->fourcc,
EGL_NONE, /* end of list */
};
if (dmabuf->texture != 0) {
return;
}
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;
}
#endif /* CONFIG_OPENGL_DMABUF */
/* ---------------------------------------------------------------------- */
EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
{
EGLSurface esurface;
EGLBoolean b;
esurface = eglCreateWindowSurface(qemu_egl_display,
qemu_egl_config,
(EGLNativeWindowType)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;
}
/* ---------------------------------------------------------------------- */
/*
* 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")) {
PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT =
(void *) eglGetProcAddress("eglGetPlatformDisplayEXT");
if (getPlatformDisplayEXT && platform != 0) {
dpy = getPlatformDisplayEXT(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");
return -1;
}
b = eglInitialize(qemu_egl_display, &major, &minor);
if (b == EGL_FALSE) {
error_report("egl: eglInitialize failed");
return -1;
}
b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
if (b == EGL_FALSE) {
error_report("egl: eglBindAPI failed (%s mode)",
gles ? "gles" : "core");
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)",
gles ? "gles" : "core");
return -1;
}
qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE;
return 0;
}
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
}
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;
}
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