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

/*
 * Copyright (C) 2015-2016 Gerd Hoffmann <[email protected]>
 *
 * 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;

/* ------------------------------------------------------------------ */

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)
{
    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);
    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)
{
    static const EGLint conf_att_gl[] = {
        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,
    };
    EGLint major, minor;
    EGLBoolean b;
    EGLint n;

    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(EGL_OPENGL_API);
    if (b == EGL_FALSE) {
        error_report("egl: eglBindAPI failed");
        return -1;
    }

    b = eglChooseConfig(qemu_egl_display, conf_att_gl,
                        &qemu_egl_config, 1, &n);
    if (b == EGL_FALSE || n != 1) {
        error_report("egl: eglChooseConfig failed");
        return -1;
    }
    return 0;
}

int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy)
{
#ifdef EGL_KHR_platform_x11
    return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR);
#else
    return qemu_egl_init_dpy(dpy, 0);
#endif
}

int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy)
{
#ifdef EGL_MESA_platform_gbm
    return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA);
#else
    return qemu_egl_init_dpy(dpy, 0);
#endif
}

EGLContext qemu_egl_init_ctx(void)
{
    static const EGLint ctx_att_gl[] = {
        EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
        EGL_NONE
    };
    EGLContext ectx;
    EGLBoolean b;

    ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
                            ctx_att_gl);
    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 <[email protected]>
	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;
	27
6fafc260 GH	28	/* ------------------------------------------------------------------ */
6fafc260 GH	29
74083f9c GH	30	static void egl_fb_delete_texture(egl_fb *fb)
	31	{
	32	if (!fb->delete_texture) {
	33	return;
	34	}
	35
	36	glDeleteTextures(1, &fb->texture);
	37	fb->delete_texture = false;
	38	}
	39
6fafc260 GH	40	void egl_fb_destroy(egl_fb *fb)
	41	{
	42	if (!fb->framebuffer) {
	43	return;
	44	}
	45
74083f9c	46	egl_fb_delete_texture(fb);
6fafc260 GH	47	glDeleteFramebuffers(1, &fb->framebuffer);
	48
	49	fb->width = 0;
	50	fb->height = 0;
	51	fb->texture = 0;
	52	fb->framebuffer = 0;
	53	}
	54
	55	void egl_fb_setup_default(egl_fb *fb, int width, int height)
	56	{
	57	fb->width = width;
	58	fb->height = height;
	59	fb->framebuffer = 0; /* default framebuffer */
	60	}
	61
74083f9c GH	62	void egl_fb_setup_for_tex(egl_fb *fb, int width, int height,
74083f9c GH	63	GLuint texture, bool delete)
6fafc260	64	{
74083f9c GH	65	egl_fb_delete_texture(fb);
74083f9c GH	66
6fafc260 GH	67	fb->width = width;
	68	fb->height = height;
	69	fb->texture = texture;
74083f9c	70	fb->delete_texture = delete;
6fafc260 GH	71	if (!fb->framebuffer) {
	72	glGenFramebuffers(1, &fb->framebuffer);
	73	}
	74
	75	glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer);
	76	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
	77	GL_TEXTURE_2D, fb->texture, 0);
	78	}
	79
74083f9c	80	void egl_fb_setup_new_tex(egl_fb *fb, int width, int height)
6fafc260 GH	81	{
	82	GLuint texture;
	83
	84	glGenTextures(1, &texture);
	85	glBindTexture(GL_TEXTURE_2D, texture);
41126214	86	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height,
6fafc260 GH	87	0, GL_BGRA, GL_UNSIGNED_BYTE, 0);
6fafc260 GH	88
74083f9c	89	egl_fb_setup_for_tex(fb, width, height, texture, true);
6fafc260 GH	90	}
	91
	92	void egl_fb_blit(egl_fb dst, egl_fb src, bool flip)
	93	{
	94	GLuint y1, y2;
	95
	96	glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
	97	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
	98	glViewport(0, 0, dst->width, dst->height);
	99	y1 = flip ? src->height : 0;
	100	y2 = flip ? 0 : src->height;
	101	glBlitFramebuffer(0, y1, src->width, y2,
	102	0, 0, dst->width, dst->height,
	103	GL_COLOR_BUFFER_BIT, GL_LINEAR);
	104	}
	105
	106	void egl_fb_read(void dst, egl_fb src)
	107	{
	108	glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
	109	glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
	110	glReadPixels(0, 0, src->width, src->height,
	111	GL_BGRA, GL_UNSIGNED_BYTE, dst);
	112	}
	113
0eb50c27 GH	114	void egl_texture_blit(QemuGLShader gls, egl_fb dst, egl_fb *src, bool flip)
	115	{
	116	glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
	117	glViewport(0, 0, dst->width, dst->height);
	118	glEnable(GL_TEXTURE_2D);
	119	glBindTexture(GL_TEXTURE_2D, src->texture);
	120	qemu_gl_run_texture_blit(gls, flip);
	121	}
	122
	123	void egl_texture_blend(QemuGLShader gls, egl_fb dst, egl_fb *src, bool flip,
	124	int x, int y)
	125	{
	126	glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
	127	if (flip) {
	128	glViewport(x, y, src->width, src->height);
	129	} else {
	130	glViewport(x, dst->height - src->height - y,
	131	src->width, src->height);
	132	}
	133	glEnable(GL_TEXTURE_2D);
	134	glBindTexture(GL_TEXTURE_2D, src->texture);
	135	glEnable(GL_BLEND);
	136	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
	137	qemu_gl_run_texture_blit(gls, flip);
	138	glDisable(GL_BLEND);
	139	}
	140
7ced9e9f GH	141	/* ---------------------------------------------------------------------- */
7ced9e9f GH	142
1e316598 GH	143	#ifdef CONFIG_OPENGL_DMABUF
	144
	145	int qemu_egl_rn_fd;
	146	struct gbm_device *qemu_egl_rn_gbm_dev;
	147	EGLContext qemu_egl_rn_ctx;
	148
7b525508	149	static int qemu_egl_rendernode_open(const char *rendernode)
1e316598 GH	150	{
	151	DIR *dir;
	152	struct dirent *e;
	153	int r, fd;
	154	char *p;
	155
7b525508 MAL	156	if (rendernode) {
	157	return open(rendernode, O_RDWR \| O_CLOEXEC \| O_NOCTTY \| O_NONBLOCK);
	158	}
	159
1e316598 GH	160	dir = opendir("/dev/dri");
	161	if (!dir) {
	162	return -1;
	163	}
	164
	165	fd = -1;
	166	while ((e = readdir(dir))) {
	167	if (e->d_type != DT_CHR) {
	168	continue;
	169	}
	170
	171	if (strncmp(e->d_name, "renderD", 7)) {
	172	continue;
	173	}
	174
f454f49c	175	p = g_strdup_printf("/dev/dri/%s", e->d_name);
1e316598 GH	176
	177	r = open(p, O_RDWR \| O_CLOEXEC \| O_NOCTTY \| O_NONBLOCK);
	178	if (r < 0) {
f454f49c	179	g_free(p);
1e316598 GH	180	continue;
	181	}
	182	fd = r;
f454f49c	183	g_free(p);
1e316598 GH	184	break;
	185	}
	186
	187	closedir(dir);
	188	if (fd < 0) {
	189	return -1;
	190	}
	191	return fd;
	192	}
	193
7b525508	194	int egl_rendernode_init(const char *rendernode)
1e316598 GH	195	{
1e316598 GH	196	qemu_egl_rn_fd = -1;
151c8e60	197	int rc;
1e316598	198
7b525508	199	qemu_egl_rn_fd = qemu_egl_rendernode_open(rendernode);
1e316598	200	if (qemu_egl_rn_fd == -1) {
38a55bdd	201	error_report("egl: no drm render node available");
1e316598 GH	202	goto err;
	203	}
	204
	205	qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
	206	if (!qemu_egl_rn_gbm_dev) {
38a55bdd	207	error_report("egl: gbm_create_device failed");
1e316598 GH	208	goto err;
	209	}
	210
151c8e60 GH	211	rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev);
	212	if (rc != 0) {
	213	/* qemu_egl_init_dpy_mesa reports error */
	214	goto err;
	215	}
1e316598 GH	216
	217	if (!epoxy_has_egl_extension(qemu_egl_display,
	218	"EGL_KHR_surfaceless_context")) {
38a55bdd	219	error_report("egl: EGL_KHR_surfaceless_context not supported");
1e316598 GH	220	goto err;
	221	}
	222	if (!epoxy_has_egl_extension(qemu_egl_display,
	223	"EGL_MESA_image_dma_buf_export")) {
38a55bdd	224	error_report("egl: EGL_MESA_image_dma_buf_export not supported");
1e316598 GH	225	goto err;
	226	}
	227
	228	qemu_egl_rn_ctx = qemu_egl_init_ctx();
	229	if (!qemu_egl_rn_ctx) {
38a55bdd	230	error_report("egl: egl_init_ctx failed");
1e316598 GH	231	goto err;
	232	}
	233
	234	return 0;
	235
	236	err:
	237	if (qemu_egl_rn_gbm_dev) {
	238	gbm_device_destroy(qemu_egl_rn_gbm_dev);
	239	}
	240	if (qemu_egl_rn_fd != -1) {
	241	close(qemu_egl_rn_fd);
	242	}
	243
	244	return -1;
	245	}
	246
	247	int egl_get_fd_for_texture(uint32_t tex_id, EGLint stride, EGLint fourcc)
	248	{
	249	EGLImageKHR image;
	250	EGLint num_planes, fd;
	251
	252	image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
	253	EGL_GL_TEXTURE_2D_KHR,
	254	(EGLClientBuffer)(unsigned long)tex_id,
	255	NULL);
	256	if (!image) {
	257	return -1;
	258	}
	259
	260	eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
	261	&num_planes, NULL);
	262	if (num_planes != 1) {
	263	eglDestroyImageKHR(qemu_egl_display, image);
	264	return -1;
	265	}
	266	eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
	267	eglDestroyImageKHR(qemu_egl_display, image);
	268
	269	return fd;
	270	}
	271
86c0522c GH	272	void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
	273	{
	274	EGLImageKHR image = EGL_NO_IMAGE_KHR;
	275	EGLint attrs[] = {
	276	EGL_DMA_BUF_PLANE0_FD_EXT, dmabuf->fd,
	277	EGL_DMA_BUF_PLANE0_PITCH_EXT, dmabuf->stride,
	278	EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
	279	EGL_WIDTH, dmabuf->width,
	280	EGL_HEIGHT, dmabuf->height,
	281	EGL_LINUX_DRM_FOURCC_EXT, dmabuf->fourcc,
	282	EGL_NONE, /* end of list */
	283	};
	284
	285	if (dmabuf->texture != 0) {
	286	return;
	287	}
	288
	289	image = eglCreateImageKHR(qemu_egl_display,
	290	EGL_NO_CONTEXT,
	291	EGL_LINUX_DMA_BUF_EXT,
	292	NULL, attrs);
	293	if (image == EGL_NO_IMAGE_KHR) {
	294	error_report("eglCreateImageKHR failed");
	295	return;
	296	}
	297
	298	glGenTextures(1, &dmabuf->texture);
	299	glBindTexture(GL_TEXTURE_2D, dmabuf->texture);
	300	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	301	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	302
	303	glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
	304	eglDestroyImageKHR(qemu_egl_display, image);
	305	}
	306
	307	void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)
	308	{
	309	if (dmabuf->texture == 0) {
	310	return;
	311	}
	312
	313	glDeleteTextures(1, &dmabuf->texture);
	314	dmabuf->texture = 0;
	315	}
	316
1e316598 GH	317	#endif /* CONFIG_OPENGL_DMABUF */
	318
	319	/* ---------------------------------------------------------------------- */
	320
7ced9e9f GH	321	EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
	322	{
	323	EGLSurface esurface;
	324	EGLBoolean b;
	325
7ced9e9f GH	326	esurface = eglCreateWindowSurface(qemu_egl_display,
	327	qemu_egl_config,
	328	(EGLNativeWindowType)win, NULL);
	329	if (esurface == EGL_NO_SURFACE) {
38a55bdd	330	error_report("egl: eglCreateWindowSurface failed");
7ced9e9f GH	331	return NULL;
	332	}
	333
	334	b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
	335	if (b == EGL_FALSE) {
38a55bdd	336	error_report("egl: eglMakeCurrent failed");
7ced9e9f GH	337	return NULL;
	338	}
	339
	340	return esurface;
	341	}
	342
	343	/* ---------------------------------------------------------------------- */
	344
8bce03e3 GH	345	/*
	346	* Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed
	347	*
	348	* Create an EGLDisplay from a native display type. This is a little quirky
	349	* for a few reasons.
	350	*
	351	* 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to
	352	* use, but have different function signatures in the third argument; this
	353	* happens not to matter for us, at the moment, but it means epoxy won't alias
	354	* them together.
	355	*
	356	* 2: epoxy 1.3 and earlier don't understand EGL client extensions, which
	357	* means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver
	358	* will crash.
	359	*
	360	* 3: You can't tell whether you have EGL 1.5 at this point, because
	361	* eglQueryString(EGL_VERSION) is a property of the display, which we don't
	362	* have yet. So you have to query for extensions no matter what. Fortunately
	363	* epoxy_has_egl_extension _does_ let you query for client extensions, so
	364	* we don't have to write our own extension string parsing.
	365	*
	366	* 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one
	367	* needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay
	368	* function pointer.
	369	* We can workaround this (circular dependency) by probing for the EGL 1.5
	370	* platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem
	371	* like mesa will be able to advertise these (even though it can do EGL 1.5).
	372	*/
e1913dbb GH	373	static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native,
e1913dbb GH	374	EGLenum platform)
8bce03e3 GH	375	{
	376	EGLDisplay dpy = EGL_NO_DISPLAY;
	377
8bce03e3 GH	378	/* In practise any EGL 1.5 implementation would support the EXT extension */
	379	if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
	380	PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT =
	381	(void *) eglGetProcAddress("eglGetPlatformDisplayEXT");
e1913dbb GH	382	if (getPlatformDisplayEXT && platform != 0) {
e1913dbb GH	383	dpy = getPlatformDisplayEXT(platform, native, NULL);
8bce03e3 GH	384	}
8bce03e3 GH	385	}
8bce03e3 GH	386
	387	if (dpy == EGL_NO_DISPLAY) {
	388	/* fallback */
	389	dpy = eglGetDisplay(native);
	390	}
	391	return dpy;
	392	}
	393
e1913dbb GH	394	static int qemu_egl_init_dpy(EGLNativeDisplayType dpy,
e1913dbb GH	395	EGLenum platform)
7ced9e9f GH	396	{
	397	static const EGLint conf_att_gl[] = {
	398	EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
	399	EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
	400	EGL_RED_SIZE, 5,
	401	EGL_GREEN_SIZE, 5,
	402	EGL_BLUE_SIZE, 5,
	403	EGL_ALPHA_SIZE, 0,
	404	EGL_NONE,
	405	};
7ced9e9f GH	406	EGLint major, minor;
	407	EGLBoolean b;
	408	EGLint n;
	409
e1913dbb	410	qemu_egl_display = qemu_egl_get_display(dpy, platform);
7ced9e9f	411	if (qemu_egl_display == EGL_NO_DISPLAY) {
38a55bdd	412	error_report("egl: eglGetDisplay failed");
7ced9e9f GH	413	return -1;
	414	}
	415
7ced9e9f GH	416	b = eglInitialize(qemu_egl_display, &major, &minor);
7ced9e9f GH	417	if (b == EGL_FALSE) {
38a55bdd	418	error_report("egl: eglInitialize failed");
7ced9e9f GH	419	return -1;
	420	}
	421
9f728c79	422	b = eglBindAPI(EGL_OPENGL_API);
7ced9e9f	423	if (b == EGL_FALSE) {
38a55bdd	424	error_report("egl: eglBindAPI failed");
7ced9e9f GH	425	return -1;
	426	}
	427
9f728c79	428	b = eglChooseConfig(qemu_egl_display, conf_att_gl,
7ced9e9f GH	429	&qemu_egl_config, 1, &n);
7ced9e9f GH	430	if (b == EGL_FALSE \|\| n != 1) {
38a55bdd	431	error_report("egl: eglChooseConfig failed");
7ced9e9f GH	432	return -1;
7ced9e9f GH	433	}
7ced9e9f GH	434	return 0;
	435	}
	436
e1913dbb GH	437	int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy)
	438	{
	439	#ifdef EGL_KHR_platform_x11
	440	return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR);
	441	#else
	442	return qemu_egl_init_dpy(dpy, 0);
	443	#endif
	444	}
	445
	446	int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy)
	447	{
	448	#ifdef EGL_MESA_platform_gbm
	449	return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA);
	450	#else
	451	return qemu_egl_init_dpy(dpy, 0);
	452	#endif
	453	}
	454
7ced9e9f GH	455	EGLContext qemu_egl_init_ctx(void)
	456	{
	457	static const EGLint ctx_att_gl[] = {
bc8c946f	458	EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
7ced9e9f GH	459	EGL_NONE
7ced9e9f GH	460	};
7ced9e9f GH	461	EGLContext ectx;
	462	EGLBoolean b;
	463
7ced9e9f	464	ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
9f728c79	465	ctx_att_gl);
7ced9e9f	466	if (ectx == EGL_NO_CONTEXT) {
38a55bdd	467	error_report("egl: eglCreateContext failed");
7ced9e9f GH	468	return NULL;
	469	}
	470
	471	b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
	472	if (b == EGL_FALSE) {
38a55bdd	473	error_report("egl: eglMakeCurrent failed");
7ced9e9f GH	474	return NULL;
	475	}
	476
	477	return ectx;
	478	}