[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/egl-helpers.h"

EGLDisplay *qemu_egl_display;
EGLConfig qemu_egl_config;

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

void egl_fb_destroy(egl_fb *fb)
{
    if (!fb->framebuffer) {
        return;
    }

    if (fb->delete_texture) {
        glDeleteTextures(1, &fb->texture);
        fb->delete_texture = false;
    }
    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_create_for_tex(egl_fb *fb, int width, int height, GLuint texture)
{
    fb->width = width;
    fb->height = height;
    fb->texture = texture;
    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_create_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_RGB, width, height,
                 0, GL_BGRA, GL_UNSIGNED_BYTE, 0);

    egl_fb_create_for_tex(fb, width, height, texture);
    fb->delete_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);
}

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

#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;
}

#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"
7ced9e9f GH	22	#include "ui/egl-helpers.h"
	23
	24	EGLDisplay *qemu_egl_display;
	25	EGLConfig qemu_egl_config;
	26
6fafc260 GH	27	/* ------------------------------------------------------------------ */
	28
	29	void egl_fb_destroy(egl_fb *fb)
	30	{
	31	if (!fb->framebuffer) {
	32	return;
	33	}
	34
	35	if (fb->delete_texture) {
	36	glDeleteTextures(1, &fb->texture);
	37	fb->delete_texture = false;
	38	}
	39	glDeleteFramebuffers(1, &fb->framebuffer);
	40
	41	fb->width = 0;
	42	fb->height = 0;
	43	fb->texture = 0;
	44	fb->framebuffer = 0;
	45	}
	46
	47	void egl_fb_setup_default(egl_fb *fb, int width, int height)
	48	{
	49	fb->width = width;
	50	fb->height = height;
	51	fb->framebuffer = 0; /* default framebuffer */
	52	}
	53
	54	void egl_fb_create_for_tex(egl_fb *fb, int width, int height, GLuint texture)
	55	{
	56	fb->width = width;
	57	fb->height = height;
	58	fb->texture = texture;
	59	if (!fb->framebuffer) {
	60	glGenFramebuffers(1, &fb->framebuffer);
	61	}
	62
	63	glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer);
	64	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
	65	GL_TEXTURE_2D, fb->texture, 0);
	66	}
	67
	68	void egl_fb_create_new_tex(egl_fb *fb, int width, int height)
	69	{
	70	GLuint texture;
	71
	72	glGenTextures(1, &texture);
	73	glBindTexture(GL_TEXTURE_2D, texture);
	74	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height,
	75	0, GL_BGRA, GL_UNSIGNED_BYTE, 0);
	76
	77	egl_fb_create_for_tex(fb, width, height, texture);
	78	fb->delete_texture = true;
	79	}
	80
	81	void egl_fb_blit(egl_fb dst, egl_fb src, bool flip)
	82	{
	83	GLuint y1, y2;
	84
	85	glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
	86	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
	87	glViewport(0, 0, dst->width, dst->height);
	88	y1 = flip ? src->height : 0;
	89	y2 = flip ? 0 : src->height;
	90	glBlitFramebuffer(0, y1, src->width, y2,
91	0, 0, dst->width, dst->height,
92	GL_COLOR_BUFFER_BIT, GL_LINEAR);
93	}
94
95	void egl_fb_read(void dst, egl_fb src)
96	{
97	glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
98	glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
99	glReadPixels(0, 0, src->width, src->height,
100	GL_BGRA, GL_UNSIGNED_BYTE, dst);
101	}
102
7ced9e9f GH	103	/* ---------------------------------------------------------------------- */
7ced9e9f GH	104
1e316598 GH	105	#ifdef CONFIG_OPENGL_DMABUF
	106
	107	int qemu_egl_rn_fd;
	108	struct gbm_device *qemu_egl_rn_gbm_dev;
	109	EGLContext qemu_egl_rn_ctx;
	110
7b525508	111	static int qemu_egl_rendernode_open(const char *rendernode)
1e316598 GH	112	{
	113	DIR *dir;
	114	struct dirent *e;
	115	int r, fd;
	116	char *p;
	117
7b525508 MAL	118	if (rendernode) {
	119	return open(rendernode, O_RDWR \| O_CLOEXEC \| O_NOCTTY \| O_NONBLOCK);
	120	}
	121
1e316598 GH	122	dir = opendir("/dev/dri");
	123	if (!dir) {
	124	return -1;
	125	}
	126
	127	fd = -1;
	128	while ((e = readdir(dir))) {
	129	if (e->d_type != DT_CHR) {
	130	continue;
	131	}
	132
	133	if (strncmp(e->d_name, "renderD", 7)) {
	134	continue;
	135	}
	136
f454f49c	137	p = g_strdup_printf("/dev/dri/%s", e->d_name);
1e316598 GH	138
	139	r = open(p, O_RDWR \| O_CLOEXEC \| O_NOCTTY \| O_NONBLOCK);
	140	if (r < 0) {
f454f49c	141	g_free(p);
1e316598 GH	142	continue;
	143	}
	144	fd = r;
f454f49c	145	g_free(p);
1e316598 GH	146	break;
	147	}
	148
	149	closedir(dir);
	150	if (fd < 0) {
	151	return -1;
	152	}
	153	return fd;
	154	}
	155
7b525508	156	int egl_rendernode_init(const char *rendernode)
1e316598 GH	157	{
1e316598 GH	158	qemu_egl_rn_fd = -1;
151c8e60	159	int rc;
1e316598	160
7b525508	161	qemu_egl_rn_fd = qemu_egl_rendernode_open(rendernode);
1e316598	162	if (qemu_egl_rn_fd == -1) {
38a55bdd	163	error_report("egl: no drm render node available");
1e316598 GH	164	goto err;
	165	}
	166
	167	qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
	168	if (!qemu_egl_rn_gbm_dev) {
38a55bdd	169	error_report("egl: gbm_create_device failed");
1e316598 GH	170	goto err;
	171	}
	172
151c8e60 GH	173	rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev);
	174	if (rc != 0) {
	175	/* qemu_egl_init_dpy_mesa reports error */
	176	goto err;
	177	}
1e316598 GH	178
	179	if (!epoxy_has_egl_extension(qemu_egl_display,
	180	"EGL_KHR_surfaceless_context")) {
38a55bdd	181	error_report("egl: EGL_KHR_surfaceless_context not supported");
1e316598 GH	182	goto err;
	183	}
	184	if (!epoxy_has_egl_extension(qemu_egl_display,
	185	"EGL_MESA_image_dma_buf_export")) {
38a55bdd	186	error_report("egl: EGL_MESA_image_dma_buf_export not supported");
1e316598 GH	187	goto err;
	188	}
	189
	190	qemu_egl_rn_ctx = qemu_egl_init_ctx();
	191	if (!qemu_egl_rn_ctx) {
38a55bdd	192	error_report("egl: egl_init_ctx failed");
1e316598 GH	193	goto err;
	194	}
	195
	196	return 0;
	197
	198	err:
	199	if (qemu_egl_rn_gbm_dev) {
	200	gbm_device_destroy(qemu_egl_rn_gbm_dev);
	201	}
	202	if (qemu_egl_rn_fd != -1) {
	203	close(qemu_egl_rn_fd);
	204	}
	205
	206	return -1;
	207	}
	208
	209	int egl_get_fd_for_texture(uint32_t tex_id, EGLint stride, EGLint fourcc)
	210	{
	211	EGLImageKHR image;
	212	EGLint num_planes, fd;
	213
	214	image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
	215	EGL_GL_TEXTURE_2D_KHR,
	216	(EGLClientBuffer)(unsigned long)tex_id,
	217	NULL);
	218	if (!image) {
	219	return -1;
	220	}
	221
	222	eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
	223	&num_planes, NULL);
	224	if (num_planes != 1) {
	225	eglDestroyImageKHR(qemu_egl_display, image);
	226	return -1;
	227	}
	228	eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
	229	eglDestroyImageKHR(qemu_egl_display, image);
	230
	231	return fd;
	232	}
	233
	234	#endif /* CONFIG_OPENGL_DMABUF */
	235
	236	/* ---------------------------------------------------------------------- */
	237
7ced9e9f GH	238	EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, Window win)
	239	{
	240	EGLSurface esurface;
	241	EGLBoolean b;
	242
7ced9e9f GH	243	esurface = eglCreateWindowSurface(qemu_egl_display,
	244	qemu_egl_config,
	245	(EGLNativeWindowType)win, NULL);
	246	if (esurface == EGL_NO_SURFACE) {
38a55bdd	247	error_report("egl: eglCreateWindowSurface failed");
7ced9e9f GH	248	return NULL;
	249	}
	250
	251	b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
	252	if (b == EGL_FALSE) {
38a55bdd	253	error_report("egl: eglMakeCurrent failed");
7ced9e9f GH	254	return NULL;
	255	}
	256
	257	return esurface;
	258	}
	259
	260	/* ---------------------------------------------------------------------- */
	261
8bce03e3 GH	262	/*
	263	* Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed
	264	*
	265	* Create an EGLDisplay from a native display type. This is a little quirky
	266	* for a few reasons.
	267	*
	268	* 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to
	269	* use, but have different function signatures in the third argument; this
	270	* happens not to matter for us, at the moment, but it means epoxy won't alias
	271	* them together.
	272	*
	273	* 2: epoxy 1.3 and earlier don't understand EGL client extensions, which
	274	* means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver
	275	* will crash.
	276	*
	277	* 3: You can't tell whether you have EGL 1.5 at this point, because
	278	* eglQueryString(EGL_VERSION) is a property of the display, which we don't
	279	* have yet. So you have to query for extensions no matter what. Fortunately
	280	* epoxy_has_egl_extension _does_ let you query for client extensions, so
	281	* we don't have to write our own extension string parsing.
	282	*
	283	* 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one
	284	* needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay
	285	* function pointer.
	286	* We can workaround this (circular dependency) by probing for the EGL 1.5
	287	* platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem
	288	* like mesa will be able to advertise these (even though it can do EGL 1.5).
	289	*/
e1913dbb GH	290	static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native,
e1913dbb GH	291	EGLenum platform)
8bce03e3 GH	292	{
	293	EGLDisplay dpy = EGL_NO_DISPLAY;
	294
8bce03e3 GH	295	/* In practise any EGL 1.5 implementation would support the EXT extension */
	296	if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
	297	PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT =
	298	(void *) eglGetProcAddress("eglGetPlatformDisplayEXT");
e1913dbb GH	299	if (getPlatformDisplayEXT && platform != 0) {
e1913dbb GH	300	dpy = getPlatformDisplayEXT(platform, native, NULL);
8bce03e3 GH	301	}
8bce03e3 GH	302	}
8bce03e3 GH	303
	304	if (dpy == EGL_NO_DISPLAY) {
	305	/* fallback */
	306	dpy = eglGetDisplay(native);
	307	}
	308	return dpy;
	309	}
	310
e1913dbb GH	311	static int qemu_egl_init_dpy(EGLNativeDisplayType dpy,
e1913dbb GH	312	EGLenum platform)
7ced9e9f GH	313	{
	314	static const EGLint conf_att_gl[] = {
	315	EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
	316	EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
	317	EGL_RED_SIZE, 5,
	318	EGL_GREEN_SIZE, 5,
	319	EGL_BLUE_SIZE, 5,
	320	EGL_ALPHA_SIZE, 0,
	321	EGL_NONE,
	322	};
7ced9e9f GH	323	EGLint major, minor;
	324	EGLBoolean b;
	325	EGLint n;
	326
e1913dbb	327	qemu_egl_display = qemu_egl_get_display(dpy, platform);
7ced9e9f	328	if (qemu_egl_display == EGL_NO_DISPLAY) {
38a55bdd	329	error_report("egl: eglGetDisplay failed");
7ced9e9f GH	330	return -1;
	331	}
	332
7ced9e9f GH	333	b = eglInitialize(qemu_egl_display, &major, &minor);
7ced9e9f GH	334	if (b == EGL_FALSE) {
38a55bdd	335	error_report("egl: eglInitialize failed");
7ced9e9f GH	336	return -1;
	337	}
	338
9f728c79	339	b = eglBindAPI(EGL_OPENGL_API);
7ced9e9f	340	if (b == EGL_FALSE) {
38a55bdd	341	error_report("egl: eglBindAPI failed");
7ced9e9f GH	342	return -1;
	343	}
	344
9f728c79	345	b = eglChooseConfig(qemu_egl_display, conf_att_gl,
7ced9e9f GH	346	&qemu_egl_config, 1, &n);
7ced9e9f GH	347	if (b == EGL_FALSE \|\| n != 1) {
38a55bdd	348	error_report("egl: eglChooseConfig failed");
7ced9e9f GH	349	return -1;
7ced9e9f GH	350	}
7ced9e9f GH	351	return 0;
	352	}
	353
e1913dbb GH	354	int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy)
	355	{
	356	#ifdef EGL_KHR_platform_x11
	357	return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR);
	358	#else
	359	return qemu_egl_init_dpy(dpy, 0);
	360	#endif
	361	}
	362
	363	int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy)
	364	{
	365	#ifdef EGL_MESA_platform_gbm
	366	return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA);
	367	#else
	368	return qemu_egl_init_dpy(dpy, 0);
	369	#endif
	370	}
	371
7ced9e9f GH	372	EGLContext qemu_egl_init_ctx(void)
	373	{
	374	static const EGLint ctx_att_gl[] = {
bc8c946f	375	EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
7ced9e9f GH	376	EGL_NONE
7ced9e9f GH	377	};
7ced9e9f GH	378	EGLContext ectx;
	379	EGLBoolean b;
	380
7ced9e9f	381	ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
9f728c79	382	ctx_att_gl);
7ced9e9f	383	if (ectx == EGL_NO_CONTEXT) {
38a55bdd	384	error_report("egl: eglCreateContext failed");
7ced9e9f GH	385	return NULL;
	386	}
	387
	388	b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
	389	if (b == EGL_FALSE) {
38a55bdd	390	error_report("egl: eglMakeCurrent failed");
7ced9e9f GH	391	return NULL;
	392	}
	393
	394	return ectx;
	395	}