[mirror_qemu.git] / ui / egl-helpers.c

/*
 * 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 <glob.h>
#include <dirent.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;

static int qemu_egl_rendernode_open(const char *rendernode)
{
    DIR *dir;
    struct dirent *e;
    int r, fd;
    char *p;

    if (rendernode) {
        return open(rendernode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
    }

    dir = opendir("/dev/dri");
    if (!dir) {
        return -1;
    }

    fd = -1;
    while ((e = readdir(dir))) {
        if (e->d_type != DT_CHR) {
            continue;
        }

        if (strncmp(e->d_name, "renderD", 7)) {
            continue;
        }

        p = g_strdup_printf("/dev/dri/%s", e->d_name);

        r = open(p, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
        if (r < 0) {
            g_free(p);
            continue;
        }
        fd = r;
        g_free(p);
        break;
    }

    closedir(dir);
    if (fd < 0) {
        return -1;
    }
    return fd;
}

int egl_rendernode_init(const char *rendernode, DisplayGLMode mode)
{
    qemu_egl_rn_fd = -1;
    int rc;

    qemu_egl_rn_fd = qemu_egl_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;
}
Commit	Line	Data
6250dff3 FZ	1	/*
	2	* Copyright (C) 2015-2016 Gerd Hoffmann <kraxel@redhat.com>
	3	*
	4	* This library is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Lesser General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2.1 of the License, or (at your option) any later version.
	8	*
	9	* This library is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Lesser General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Lesser General Public
	15	* License along with this library; if not, see <http://www.gnu.org/licenses/>.
	16	*/
e16f4c87	17	#include "qemu/osdep.h"
7ced9e9f	18	#include <glob.h>
1e316598	19	#include <dirent.h>
7ced9e9f	20
38a55bdd	21	#include "qemu/error-report.h"
86c0522c	22	#include "ui/console.h"
7ced9e9f GH	23	#include "ui/egl-helpers.h"
	24
	25	EGLDisplay *qemu_egl_display;
	26	EGLConfig qemu_egl_config;
54d208ff	27	DisplayGLMode qemu_egl_mode;
7ced9e9f	28
6fafc260 GH	29	/* ------------------------------------------------------------------ */
6fafc260 GH	30
74083f9c GH	31	static void egl_fb_delete_texture(egl_fb *fb)
	32	{
	33	if (!fb->delete_texture) {
	34	return;
	35	}
	36
	37	glDeleteTextures(1, &fb->texture);
	38	fb->delete_texture = false;
	39	}
	40
6fafc260 GH	41	void egl_fb_destroy(egl_fb *fb)
	42	{
	43	if (!fb->framebuffer) {
	44	return;
	45	}
	46
74083f9c	47	egl_fb_delete_texture(fb);
6fafc260 GH	48	glDeleteFramebuffers(1, &fb->framebuffer);
	49
	50	fb->width = 0;
	51	fb->height = 0;
	52	fb->texture = 0;
	53	fb->framebuffer = 0;
	54	}
	55
	56	void egl_fb_setup_default(egl_fb *fb, int width, int height)
	57	{
	58	fb->width = width;
	59	fb->height = height;
	60	fb->framebuffer = 0; /* default framebuffer */
	61	}
	62
74083f9c GH	63	void egl_fb_setup_for_tex(egl_fb *fb, int width, int height,
74083f9c GH	64	GLuint texture, bool delete)
6fafc260	65	{
74083f9c GH	66	egl_fb_delete_texture(fb);
74083f9c GH	67
6fafc260 GH	68	fb->width = width;
	69	fb->height = height;
	70	fb->texture = texture;
74083f9c	71	fb->delete_texture = delete;
6fafc260 GH	72	if (!fb->framebuffer) {
	73	glGenFramebuffers(1, &fb->framebuffer);
	74	}
	75
	76	glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer);
	77	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
	78	GL_TEXTURE_2D, fb->texture, 0);
	79	}
	80
74083f9c	81	void egl_fb_setup_new_tex(egl_fb *fb, int width, int height)
6fafc260 GH	82	{
	83	GLuint texture;
	84
	85	glGenTextures(1, &texture);
	86	glBindTexture(GL_TEXTURE_2D, texture);
41126214	87	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height,
6fafc260 GH	88	0, GL_BGRA, GL_UNSIGNED_BYTE, 0);
6fafc260 GH	89
74083f9c	90	egl_fb_setup_for_tex(fb, width, height, texture, true);
6fafc260 GH	91	}
	92
	93	void egl_fb_blit(egl_fb dst, egl_fb src, bool flip)
	94	{
	95	GLuint y1, y2;
	96
	97	glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
	98	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
	99	glViewport(0, 0, dst->width, dst->height);
	100	y1 = flip ? src->height : 0;
	101	y2 = flip ? 0 : src->height;
	102	glBlitFramebuffer(0, y1, src->width, y2,
	103	0, 0, dst->width, dst->height,
	104	GL_COLOR_BUFFER_BIT, GL_LINEAR);
	105	}
	106
	107	void egl_fb_read(void dst, egl_fb src)
	108	{
	109	glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
	110	glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
	111	glReadPixels(0, 0, src->width, src->height,
	112	GL_BGRA, GL_UNSIGNED_BYTE, dst);
	113	}
	114
0eb50c27 GH	115	void egl_texture_blit(QemuGLShader gls, egl_fb dst, egl_fb *src, bool flip)
	116	{
	117	glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
	118	glViewport(0, 0, dst->width, dst->height);
	119	glEnable(GL_TEXTURE_2D);
	120	glBindTexture(GL_TEXTURE_2D, src->texture);
	121	qemu_gl_run_texture_blit(gls, flip);
	122	}
	123
	124	void egl_texture_blend(QemuGLShader gls, egl_fb dst, egl_fb *src, bool flip,
	125	int x, int y)
	126	{
	127	glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
	128	if (flip) {
	129	glViewport(x, y, src->width, src->height);
	130	} else {
	131	glViewport(x, dst->height - src->height - y,
	132	src->width, src->height);
	133	}
	134	glEnable(GL_TEXTURE_2D);
	135	glBindTexture(GL_TEXTURE_2D, src->texture);
	136	glEnable(GL_BLEND);
	137	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	138	qemu_gl_run_texture_blit(gls, flip);
	139	glDisable(GL_BLEND);
	140	}
	141
7ced9e9f GH	142	/* ---------------------------------------------------------------------- */
7ced9e9f GH	143
1e316598 GH	144	#ifdef CONFIG_OPENGL_DMABUF
	145
	146	int qemu_egl_rn_fd;
	147	struct gbm_device *qemu_egl_rn_gbm_dev;
	148	EGLContext qemu_egl_rn_ctx;
	149
7b525508	150	static int qemu_egl_rendernode_open(const char *rendernode)
1e316598 GH	151	{
	152	DIR *dir;
	153	struct dirent *e;
	154	int r, fd;
	155	char *p;
	156
7b525508 MAL	157	if (rendernode) {
	158	return open(rendernode, O_RDWR \| O_CLOEXEC \| O_NOCTTY \| O_NONBLOCK);
	159	}
	160
1e316598 GH	161	dir = opendir("/dev/dri");
	162	if (!dir) {
	163	return -1;
	164	}
	165
	166	fd = -1;
	167	while ((e = readdir(dir))) {
	168	if (e->d_type != DT_CHR) {
	169	continue;
	170	}
	171
	172	if (strncmp(e->d_name, "renderD", 7)) {
	173	continue;
	174	}
	175
f454f49c	176	p = g_strdup_printf("/dev/dri/%s", e->d_name);
1e316598 GH	177
	178	r = open(p, O_RDWR \| O_CLOEXEC \| O_NOCTTY \| O_NONBLOCK);
	179	if (r < 0) {
f454f49c	180	g_free(p);
1e316598 GH	181	continue;
	182	}
	183	fd = r;
f454f49c	184	g_free(p);
1e316598 GH	185	break;
	186	}
	187
	188	closedir(dir);
	189	if (fd < 0) {
	190	return -1;
	191	}
	192	return fd;
	193	}
	194
54d208ff	195	int egl_rendernode_init(const char *rendernode, DisplayGLMode mode)
1e316598 GH	196	{
1e316598 GH	197	qemu_egl_rn_fd = -1;
151c8e60	198	int rc;
1e316598	199
7b525508	200	qemu_egl_rn_fd = qemu_egl_rendernode_open(rendernode);
1e316598	201	if (qemu_egl_rn_fd == -1) {
38a55bdd	202	error_report("egl: no drm render node available");
1e316598 GH	203	goto err;
	204	}
	205
	206	qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
	207	if (!qemu_egl_rn_gbm_dev) {
38a55bdd	208	error_report("egl: gbm_create_device failed");
1e316598 GH	209	goto err;
	210	}
	211
54d208ff GH	212	rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev,
54d208ff GH	213	mode);
151c8e60 GH	214	if (rc != 0) {
	215	/* qemu_egl_init_dpy_mesa reports error */
	216	goto err;
	217	}
1e316598 GH	218
	219	if (!epoxy_has_egl_extension(qemu_egl_display,
	220	"EGL_KHR_surfaceless_context")) {
38a55bdd	221	error_report("egl: EGL_KHR_surfaceless_context not supported");
1e316598 GH	222	goto err;
	223	}
	224	if (!epoxy_has_egl_extension(qemu_egl_display,
	225	"EGL_MESA_image_dma_buf_export")) {
38a55bdd	226	error_report("egl: EGL_MESA_image_dma_buf_export not supported");
1e316598 GH	227	goto err;
	228	}
	229
	230	qemu_egl_rn_ctx = qemu_egl_init_ctx();
	231	if (!qemu_egl_rn_ctx) {
38a55bdd	232	error_report("egl: egl_init_ctx failed");
1e316598 GH	233	goto err;
	234	}
	235
	236	return 0;
	237
	238	err:
	239	if (qemu_egl_rn_gbm_dev) {
	240	gbm_device_destroy(qemu_egl_rn_gbm_dev);
	241	}
	242	if (qemu_egl_rn_fd != -1) {
	243	close(qemu_egl_rn_fd);
	244	}
	245
	246	return -1;
	247	}
	248
	249	int egl_get_fd_for_texture(uint32_t tex_id, EGLint stride, EGLint fourcc)
	250	{
	251	EGLImageKHR image;
	252	EGLint num_planes, fd;
	253
	254	image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
	255	EGL_GL_TEXTURE_2D_KHR,
	256	(EGLClientBuffer)(unsigned long)tex_id,
	257	NULL);
	258	if (!image) {
	259	return -1;
	260	}
	261
	262	eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
	263	&num_planes, NULL);
	264	if (num_planes != 1) {
	265	eglDestroyImageKHR(qemu_egl_display, image);
	266	return -1;
	267	}
	268	eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
	269	eglDestroyImageKHR(qemu_egl_display, image);
	270
	271	return fd;
	272	}
	273
86c0522c GH	274	void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
	275	{
	276	EGLImageKHR image = EGL_NO_IMAGE_KHR;
	277	EGLint attrs[] = {
	278	EGL_DMA_BUF_PLANE0_FD_EXT, dmabuf->fd,
	279	EGL_DMA_BUF_PLANE0_PITCH_EXT, dmabuf->stride,
	280	EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
	281	EGL_WIDTH, dmabuf->width,
	282	EGL_HEIGHT, dmabuf->height,
	283	EGL_LINUX_DRM_FOURCC_EXT, dmabuf->fourcc,
	284	EGL_NONE, /* end of list */
	285	};
	286
	287	if (dmabuf->texture != 0) {
	288	return;
	289	}
	290
	291	image = eglCreateImageKHR(qemu_egl_display,
	292	EGL_NO_CONTEXT,
	293	EGL_LINUX_DMA_BUF_EXT,
	294	NULL, attrs);
	295	if (image == EGL_NO_IMAGE_KHR) {
	296	error_report("eglCreateImageKHR failed");
	297	return;
	298	}
	299
	300	glGenTextures(1, &dmabuf->texture);
	301	glBindTexture(GL_TEXTURE_2D, dmabuf->texture);
	302	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	303	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	304
	305	glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
	306	eglDestroyImageKHR(qemu_egl_display, image);
	307	}
	308
	309	void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)
	310	{
	311	if (dmabuf->texture == 0) {
	312	return;
	313	}
	314
	315	glDeleteTextures(1, &dmabuf->texture);
	316	dmabuf->texture = 0;
	317	}
	318
1e316598 GH	319	#endif /* CONFIG_OPENGL_DMABUF */
	320
	321	/* ---------------------------------------------------------------------- */
	322
7ced9e9f GH	323	EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
	324	{
	325	EGLSurface esurface;
	326	EGLBoolean b;
	327
7ced9e9f GH	328	esurface = eglCreateWindowSurface(qemu_egl_display,
	329	qemu_egl_config,
	330	(EGLNativeWindowType)win, NULL);
	331	if (esurface == EGL_NO_SURFACE) {
38a55bdd	332	error_report("egl: eglCreateWindowSurface failed");
7ced9e9f GH	333	return NULL;
	334	}
	335
	336	b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
	337	if (b == EGL_FALSE) {
38a55bdd	338	error_report("egl: eglMakeCurrent failed");
7ced9e9f GH	339	return NULL;
	340	}
	341
	342	return esurface;
	343	}
	344
	345	/* ---------------------------------------------------------------------- */
	346
8bce03e3 GH	347	/*
	348	* Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed
	349	*
	350	* Create an EGLDisplay from a native display type. This is a little quirky
	351	* for a few reasons.
	352	*
	353	* 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to
	354	* use, but have different function signatures in the third argument; this
	355	* happens not to matter for us, at the moment, but it means epoxy won't alias
	356	* them together.
	357	*
	358	* 2: epoxy 1.3 and earlier don't understand EGL client extensions, which
	359	* means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver
	360	* will crash.
	361	*
	362	* 3: You can't tell whether you have EGL 1.5 at this point, because
	363	* eglQueryString(EGL_VERSION) is a property of the display, which we don't
	364	* have yet. So you have to query for extensions no matter what. Fortunately
	365	* epoxy_has_egl_extension _does_ let you query for client extensions, so
	366	* we don't have to write our own extension string parsing.
	367	*
	368	* 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one
	369	* needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay
	370	* function pointer.
	371	* We can workaround this (circular dependency) by probing for the EGL 1.5
	372	* platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem
	373	* like mesa will be able to advertise these (even though it can do EGL 1.5).
	374	*/
e1913dbb GH	375	static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native,
e1913dbb GH	376	EGLenum platform)
8bce03e3 GH	377	{
	378	EGLDisplay dpy = EGL_NO_DISPLAY;
	379
8bce03e3 GH	380	/* In practise any EGL 1.5 implementation would support the EXT extension */
	381	if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
	382	PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT =
	383	(void *) eglGetProcAddress("eglGetPlatformDisplayEXT");
e1913dbb GH	384	if (getPlatformDisplayEXT && platform != 0) {
e1913dbb GH	385	dpy = getPlatformDisplayEXT(platform, native, NULL);
8bce03e3 GH	386	}
8bce03e3 GH	387	}
8bce03e3 GH	388
	389	if (dpy == EGL_NO_DISPLAY) {
	390	/* fallback */
	391	dpy = eglGetDisplay(native);
	392	}
	393	return dpy;
	394	}
	395
e1913dbb	396	static int qemu_egl_init_dpy(EGLNativeDisplayType dpy,
54d208ff GH	397	EGLenum platform,
54d208ff GH	398	DisplayGLMode mode)
7ced9e9f	399	{
54d208ff	400	static const EGLint conf_att_core[] = {
7ced9e9f GH	401	EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
	402	EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
	403	EGL_RED_SIZE, 5,
	404	EGL_GREEN_SIZE, 5,
	405	EGL_BLUE_SIZE, 5,
	406	EGL_ALPHA_SIZE, 0,
	407	EGL_NONE,
	408	};
54d208ff GH	409	static const EGLint conf_att_gles[] = {
	410	EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
	411	EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
	412	EGL_RED_SIZE, 5,
	413	EGL_GREEN_SIZE, 5,
	414	EGL_BLUE_SIZE, 5,
	415	EGL_ALPHA_SIZE, 0,
	416	EGL_NONE,
	417	};
7ced9e9f GH	418	EGLint major, minor;
	419	EGLBoolean b;
	420	EGLint n;
54d208ff	421	bool gles = (mode == DISPLAYGL_MODE_ES);
7ced9e9f	422
e1913dbb	423	qemu_egl_display = qemu_egl_get_display(dpy, platform);
7ced9e9f	424	if (qemu_egl_display == EGL_NO_DISPLAY) {
38a55bdd	425	error_report("egl: eglGetDisplay failed");
7ced9e9f GH	426	return -1;
	427	}
	428
7ced9e9f GH	429	b = eglInitialize(qemu_egl_display, &major, &minor);
7ced9e9f GH	430	if (b == EGL_FALSE) {
38a55bdd	431	error_report("egl: eglInitialize failed");
7ced9e9f GH	432	return -1;
	433	}
	434
54d208ff	435	b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
7ced9e9f	436	if (b == EGL_FALSE) {
54d208ff GH	437	error_report("egl: eglBindAPI failed (%s mode)",
54d208ff GH	438	gles ? "gles" : "core");
7ced9e9f GH	439	return -1;
	440	}
	441
54d208ff GH	442	b = eglChooseConfig(qemu_egl_display,
54d208ff GH	443	gles ? conf_att_gles : conf_att_core,
7ced9e9f GH	444	&qemu_egl_config, 1, &n);
7ced9e9f GH	445	if (b == EGL_FALSE \|\| n != 1) {
54d208ff GH	446	error_report("egl: eglChooseConfig failed (%s mode)",
54d208ff GH	447	gles ? "gles" : "core");
7ced9e9f GH	448	return -1;
7ced9e9f GH	449	}
54d208ff GH	450
54d208ff GH	451	qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE;
7ced9e9f GH	452	return 0;
	453	}
	454
54d208ff	455	int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode)
e1913dbb GH	456	{
e1913dbb GH	457	#ifdef EGL_KHR_platform_x11
54d208ff	458	return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR, mode);
e1913dbb	459	#else
54d208ff	460	return qemu_egl_init_dpy(dpy, 0, mode);
e1913dbb GH	461	#endif
	462	}
	463
54d208ff	464	int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode)
e1913dbb GH	465	{
e1913dbb GH	466	#ifdef EGL_MESA_platform_gbm
54d208ff	467	return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA, mode);
e1913dbb	468	#else
54d208ff	469	return qemu_egl_init_dpy(dpy, 0, mode);
e1913dbb GH	470	#endif
	471	}
	472
7ced9e9f GH	473	EGLContext qemu_egl_init_ctx(void)
7ced9e9f GH	474	{
54d208ff	475	static const EGLint ctx_att_core[] = {
bc8c946f	476	EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
7ced9e9f GH	477	EGL_NONE
7ced9e9f GH	478	};
54d208ff GH	479	static const EGLint ctx_att_gles[] = {
	480	EGL_CONTEXT_CLIENT_VERSION, 2,
	481	EGL_NONE
	482	};
	483	bool gles = (qemu_egl_mode == DISPLAYGL_MODE_ES);
7ced9e9f GH	484	EGLContext ectx;
	485	EGLBoolean b;
	486
7ced9e9f	487	ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
54d208ff	488	gles ? ctx_att_gles : ctx_att_core);
7ced9e9f	489	if (ectx == EGL_NO_CONTEXT) {
38a55bdd	490	error_report("egl: eglCreateContext failed");
7ced9e9f GH	491	return NULL;
	492	}
	493
	494	b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
	495	if (b == EGL_FALSE) {
38a55bdd	496	error_report("egl: eglMakeCurrent failed");
7ced9e9f GH	497	return NULL;
	498	}
	499
	500	return ectx;
	501	}