[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 "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, double scale_x, double scale_y)
{
    glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
    int w = scale_x * src->width;
    int h = scale_y * src->height;
    if (flip) {
        glViewport(x, y, w, h);
    } else {
        glViewport(x, dst->height - h - y, w, h);
    }
    glEnable(GL_TEXTURE_2D);
    glBindTexture(GL_TEXTURE_2D, src->texture);
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    qemu_gl_run_texture_blit(gls, flip);
    glDisable(GL_BLEND);
}

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

#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, EGLNativeWindowType win)
{
    EGLSurface esurface;
    EGLBoolean b;

    esurface = eglCreateWindowSurface(qemu_egl_display,
                                      qemu_egl_config,
                                      win, NULL);
    if (esurface == EGL_NO_SURFACE) {
        error_report("egl: eglCreateWindowSurface failed");
        return NULL;
    }

    b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
    if (b == EGL_FALSE) {
        error_report("egl: eglMakeCurrent failed");
        return NULL;
    }

    return esurface;
}

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

/*
 * 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"
b1d38037	18	#include "qemu/drm.h"
38a55bdd	19	#include "qemu/error-report.h"
86c0522c	20	#include "ui/console.h"
7ced9e9f GH	21	#include "ui/egl-helpers.h"
	22
	23	EGLDisplay *qemu_egl_display;
	24	EGLConfig qemu_egl_config;
54d208ff	25	DisplayGLMode qemu_egl_mode;
7ced9e9f	26
6fafc260 GH	27	/* ------------------------------------------------------------------ */
6fafc260 GH	28
74083f9c GH	29	static void egl_fb_delete_texture(egl_fb *fb)
	30	{
	31	if (!fb->delete_texture) {
	32	return;
	33	}
	34
	35	glDeleteTextures(1, &fb->texture);
	36	fb->delete_texture = false;
	37	}
	38
6fafc260 GH	39	void egl_fb_destroy(egl_fb *fb)
	40	{
	41	if (!fb->framebuffer) {
	42	return;
	43	}
	44
74083f9c	45	egl_fb_delete_texture(fb);
6fafc260 GH	46	glDeleteFramebuffers(1, &fb->framebuffer);
	47
	48	fb->width = 0;
	49	fb->height = 0;
	50	fb->texture = 0;
	51	fb->framebuffer = 0;
	52	}
	53
	54	void egl_fb_setup_default(egl_fb *fb, int width, int height)
	55	{
	56	fb->width = width;
	57	fb->height = height;
	58	fb->framebuffer = 0; /* default framebuffer */
	59	}
	60
74083f9c GH	61	void egl_fb_setup_for_tex(egl_fb *fb, int width, int height,
74083f9c GH	62	GLuint texture, bool delete)
6fafc260	63	{
74083f9c GH	64	egl_fb_delete_texture(fb);
74083f9c GH	65
6fafc260 GH	66	fb->width = width;
	67	fb->height = height;
	68	fb->texture = texture;
74083f9c	69	fb->delete_texture = delete;
6fafc260 GH	70	if (!fb->framebuffer) {
	71	glGenFramebuffers(1, &fb->framebuffer);
	72	}
	73
	74	glBindFramebuffer(GL_FRAMEBUFFER_EXT, fb->framebuffer);
	75	glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
	76	GL_TEXTURE_2D, fb->texture, 0);
	77	}
	78
74083f9c	79	void egl_fb_setup_new_tex(egl_fb *fb, int width, int height)
6fafc260 GH	80	{
	81	GLuint texture;
	82
	83	glGenTextures(1, &texture);
	84	glBindTexture(GL_TEXTURE_2D, texture);
41126214	85	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height,
6fafc260 GH	86	0, GL_BGRA, GL_UNSIGNED_BYTE, 0);
6fafc260 GH	87
74083f9c	88	egl_fb_setup_for_tex(fb, width, height, texture, true);
6fafc260 GH	89	}
	90
	91	void egl_fb_blit(egl_fb dst, egl_fb src, bool flip)
	92	{
	93	GLuint y1, y2;
	94
	95	glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
	96	glBindFramebuffer(GL_DRAW_FRAMEBUFFER, dst->framebuffer);
	97	glViewport(0, 0, dst->width, dst->height);
	98	y1 = flip ? src->height : 0;
	99	y2 = flip ? 0 : src->height;
	100	glBlitFramebuffer(0, y1, src->width, y2,
	101	0, 0, dst->width, dst->height,
	102	GL_COLOR_BUFFER_BIT, GL_LINEAR);
	103	}
	104
	105	void egl_fb_read(void dst, egl_fb src)
	106	{
	107	glBindFramebuffer(GL_READ_FRAMEBUFFER, src->framebuffer);
	108	glReadBuffer(GL_COLOR_ATTACHMENT0_EXT);
	109	glReadPixels(0, 0, src->width, src->height,
	110	GL_BGRA, GL_UNSIGNED_BYTE, dst);
	111	}
	112
0eb50c27 GH	113	void egl_texture_blit(QemuGLShader gls, egl_fb dst, egl_fb *src, bool flip)
	114	{
	115	glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
	116	glViewport(0, 0, dst->width, dst->height);
	117	glEnable(GL_TEXTURE_2D);
	118	glBindTexture(GL_TEXTURE_2D, src->texture);
	119	qemu_gl_run_texture_blit(gls, flip);
	120	}
	121
	122	void egl_texture_blend(QemuGLShader gls, egl_fb dst, egl_fb *src, bool flip,
051a0cde	123	int x, int y, double scale_x, double scale_y)
0eb50c27 GH	124	{
0eb50c27 GH	125	glBindFramebuffer(GL_FRAMEBUFFER_EXT, dst->framebuffer);
051a0cde CZ	126	int w = scale_x * src->width;
051a0cde CZ	127	int h = scale_y * src->height;
0eb50c27	128	if (flip) {
051a0cde	129	glViewport(x, y, w, h);
0eb50c27	130	} else {
051a0cde	131	glViewport(x, dst->height - h - y, w, h);
0eb50c27 GH	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
54d208ff	149	int egl_rendernode_init(const char *rendernode, DisplayGLMode mode)
1e316598 GH	150	{
1e316598 GH	151	qemu_egl_rn_fd = -1;
151c8e60	152	int rc;
1e316598	153
b1d38037	154	qemu_egl_rn_fd = qemu_drm_rendernode_open(rendernode);
1e316598	155	if (qemu_egl_rn_fd == -1) {
38a55bdd	156	error_report("egl: no drm render node available");
1e316598 GH	157	goto err;
	158	}
	159
	160	qemu_egl_rn_gbm_dev = gbm_create_device(qemu_egl_rn_fd);
	161	if (!qemu_egl_rn_gbm_dev) {
38a55bdd	162	error_report("egl: gbm_create_device failed");
1e316598 GH	163	goto err;
	164	}
	165
54d208ff GH	166	rc = qemu_egl_init_dpy_mesa((EGLNativeDisplayType)qemu_egl_rn_gbm_dev,
54d208ff GH	167	mode);
151c8e60 GH	168	if (rc != 0) {
	169	/* qemu_egl_init_dpy_mesa reports error */
	170	goto err;
	171	}
1e316598 GH	172
	173	if (!epoxy_has_egl_extension(qemu_egl_display,
	174	"EGL_KHR_surfaceless_context")) {
38a55bdd	175	error_report("egl: EGL_KHR_surfaceless_context not supported");
1e316598 GH	176	goto err;
	177	}
	178	if (!epoxy_has_egl_extension(qemu_egl_display,
	179	"EGL_MESA_image_dma_buf_export")) {
38a55bdd	180	error_report("egl: EGL_MESA_image_dma_buf_export not supported");
1e316598 GH	181	goto err;
	182	}
	183
	184	qemu_egl_rn_ctx = qemu_egl_init_ctx();
	185	if (!qemu_egl_rn_ctx) {
38a55bdd	186	error_report("egl: egl_init_ctx failed");
1e316598 GH	187	goto err;
	188	}
	189
	190	return 0;
	191
	192	err:
	193	if (qemu_egl_rn_gbm_dev) {
	194	gbm_device_destroy(qemu_egl_rn_gbm_dev);
	195	}
	196	if (qemu_egl_rn_fd != -1) {
	197	close(qemu_egl_rn_fd);
	198	}
	199
	200	return -1;
	201	}
	202
	203	int egl_get_fd_for_texture(uint32_t tex_id, EGLint stride, EGLint fourcc)
	204	{
	205	EGLImageKHR image;
	206	EGLint num_planes, fd;
	207
	208	image = eglCreateImageKHR(qemu_egl_display, eglGetCurrentContext(),
	209	EGL_GL_TEXTURE_2D_KHR,
	210	(EGLClientBuffer)(unsigned long)tex_id,
	211	NULL);
	212	if (!image) {
	213	return -1;
	214	}
	215
	216	eglExportDMABUFImageQueryMESA(qemu_egl_display, image, fourcc,
	217	&num_planes, NULL);
	218	if (num_planes != 1) {
	219	eglDestroyImageKHR(qemu_egl_display, image);
	220	return -1;
	221	}
	222	eglExportDMABUFImageMESA(qemu_egl_display, image, &fd, stride, NULL);
	223	eglDestroyImageKHR(qemu_egl_display, image);
	224
	225	return fd;
	226	}
	227
86c0522c GH	228	void egl_dmabuf_import_texture(QemuDmaBuf *dmabuf)
	229	{
	230	EGLImageKHR image = EGL_NO_IMAGE_KHR;
	231	EGLint attrs[] = {
	232	EGL_DMA_BUF_PLANE0_FD_EXT, dmabuf->fd,
	233	EGL_DMA_BUF_PLANE0_PITCH_EXT, dmabuf->stride,
	234	EGL_DMA_BUF_PLANE0_OFFSET_EXT, 0,
	235	EGL_WIDTH, dmabuf->width,
	236	EGL_HEIGHT, dmabuf->height,
	237	EGL_LINUX_DRM_FOURCC_EXT, dmabuf->fourcc,
	238	EGL_NONE, /* end of list */
	239	};
	240
	241	if (dmabuf->texture != 0) {
	242	return;
	243	}
	244
	245	image = eglCreateImageKHR(qemu_egl_display,
	246	EGL_NO_CONTEXT,
	247	EGL_LINUX_DMA_BUF_EXT,
	248	NULL, attrs);
	249	if (image == EGL_NO_IMAGE_KHR) {
	250	error_report("eglCreateImageKHR failed");
	251	return;
	252	}
	253
	254	glGenTextures(1, &dmabuf->texture);
	255	glBindTexture(GL_TEXTURE_2D, dmabuf->texture);
	256	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	257	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	258
	259	glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, (GLeglImageOES)image);
	260	eglDestroyImageKHR(qemu_egl_display, image);
	261	}
	262
	263	void egl_dmabuf_release_texture(QemuDmaBuf *dmabuf)
	264	{
	265	if (dmabuf->texture == 0) {
	266	return;
	267	}
	268
	269	glDeleteTextures(1, &dmabuf->texture);
	270	dmabuf->texture = 0;
	271	}
	272
1e316598 GH	273	#endif /* CONFIG_OPENGL_DMABUF */
	274
	275	/* ---------------------------------------------------------------------- */
	276
fbd57c75	277	EGLSurface qemu_egl_init_surface_x11(EGLContext ectx, EGLNativeWindowType win)
7ced9e9f GH	278	{
	279	EGLSurface esurface;
	280	EGLBoolean b;
	281
7ced9e9f GH	282	esurface = eglCreateWindowSurface(qemu_egl_display,
7ced9e9f GH	283	qemu_egl_config,
fbd57c75	284	win, NULL);
7ced9e9f	285	if (esurface == EGL_NO_SURFACE) {
38a55bdd	286	error_report("egl: eglCreateWindowSurface failed");
7ced9e9f GH	287	return NULL;
	288	}
	289
	290	b = eglMakeCurrent(qemu_egl_display, esurface, esurface, ectx);
	291	if (b == EGL_FALSE) {
38a55bdd	292	error_report("egl: eglMakeCurrent failed");
7ced9e9f GH	293	return NULL;
	294	}
	295
	296	return esurface;
	297	}
	298
	299	/* ---------------------------------------------------------------------- */
	300
8bce03e3 GH	301	/*
	302	* Taken from glamor_egl.h from the Xorg xserver, which is MIT licensed
	303	*
	304	* Create an EGLDisplay from a native display type. This is a little quirky
	305	* for a few reasons.
	306	*
	307	* 1: GetPlatformDisplayEXT and GetPlatformDisplay are the API you want to
	308	* use, but have different function signatures in the third argument; this
	309	* happens not to matter for us, at the moment, but it means epoxy won't alias
	310	* them together.
	311	*
	312	* 2: epoxy 1.3 and earlier don't understand EGL client extensions, which
	313	* means you can't call "eglGetPlatformDisplayEXT" directly, as the resolver
	314	* will crash.
	315	*
	316	* 3: You can't tell whether you have EGL 1.5 at this point, because
	317	* eglQueryString(EGL_VERSION) is a property of the display, which we don't
	318	* have yet. So you have to query for extensions no matter what. Fortunately
	319	* epoxy_has_egl_extension _does_ let you query for client extensions, so
	320	* we don't have to write our own extension string parsing.
	321	*
	322	* 4. There is no EGL_KHR_platform_base to complement the EXT one, thus one
	323	* needs to know EGL 1.5 is supported in order to use the eglGetPlatformDisplay
	324	* function pointer.
	325	* We can workaround this (circular dependency) by probing for the EGL 1.5
	326	* platform extensions (EGL_KHR_platform_gbm and friends) yet it doesn't seem
	327	* like mesa will be able to advertise these (even though it can do EGL 1.5).
	328	*/
e1913dbb GH	329	static EGLDisplay qemu_egl_get_display(EGLNativeDisplayType native,
e1913dbb GH	330	EGLenum platform)
8bce03e3 GH	331	{
	332	EGLDisplay dpy = EGL_NO_DISPLAY;
	333
8bce03e3 GH	334	/* In practise any EGL 1.5 implementation would support the EXT extension */
	335	if (epoxy_has_egl_extension(NULL, "EGL_EXT_platform_base")) {
	336	PFNEGLGETPLATFORMDISPLAYEXTPROC getPlatformDisplayEXT =
	337	(void *) eglGetProcAddress("eglGetPlatformDisplayEXT");
e1913dbb GH	338	if (getPlatformDisplayEXT && platform != 0) {
e1913dbb GH	339	dpy = getPlatformDisplayEXT(platform, native, NULL);
8bce03e3 GH	340	}
8bce03e3 GH	341	}
8bce03e3 GH	342
	343	if (dpy == EGL_NO_DISPLAY) {
	344	/* fallback */
	345	dpy = eglGetDisplay(native);
	346	}
	347	return dpy;
	348	}
	349
e1913dbb	350	static int qemu_egl_init_dpy(EGLNativeDisplayType dpy,
54d208ff GH	351	EGLenum platform,
54d208ff GH	352	DisplayGLMode mode)
7ced9e9f	353	{
54d208ff	354	static const EGLint conf_att_core[] = {
7ced9e9f GH	355	EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
	356	EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
	357	EGL_RED_SIZE, 5,
	358	EGL_GREEN_SIZE, 5,
	359	EGL_BLUE_SIZE, 5,
	360	EGL_ALPHA_SIZE, 0,
	361	EGL_NONE,
	362	};
54d208ff GH	363	static const EGLint conf_att_gles[] = {
	364	EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
	365	EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
	366	EGL_RED_SIZE, 5,
	367	EGL_GREEN_SIZE, 5,
	368	EGL_BLUE_SIZE, 5,
	369	EGL_ALPHA_SIZE, 0,
	370	EGL_NONE,
	371	};
7ced9e9f GH	372	EGLint major, minor;
	373	EGLBoolean b;
	374	EGLint n;
54d208ff	375	bool gles = (mode == DISPLAYGL_MODE_ES);
7ced9e9f	376
e1913dbb	377	qemu_egl_display = qemu_egl_get_display(dpy, platform);
7ced9e9f	378	if (qemu_egl_display == EGL_NO_DISPLAY) {
38a55bdd	379	error_report("egl: eglGetDisplay failed");
7ced9e9f GH	380	return -1;
	381	}
	382
7ced9e9f GH	383	b = eglInitialize(qemu_egl_display, &major, &minor);
7ced9e9f GH	384	if (b == EGL_FALSE) {
38a55bdd	385	error_report("egl: eglInitialize failed");
7ced9e9f GH	386	return -1;
	387	}
	388
54d208ff	389	b = eglBindAPI(gles ? EGL_OPENGL_ES_API : EGL_OPENGL_API);
7ced9e9f	390	if (b == EGL_FALSE) {
54d208ff GH	391	error_report("egl: eglBindAPI failed (%s mode)",
54d208ff GH	392	gles ? "gles" : "core");
7ced9e9f GH	393	return -1;
	394	}
	395
54d208ff GH	396	b = eglChooseConfig(qemu_egl_display,
54d208ff GH	397	gles ? conf_att_gles : conf_att_core,
7ced9e9f GH	398	&qemu_egl_config, 1, &n);
7ced9e9f GH	399	if (b == EGL_FALSE \|\| n != 1) {
54d208ff GH	400	error_report("egl: eglChooseConfig failed (%s mode)",
54d208ff GH	401	gles ? "gles" : "core");
7ced9e9f GH	402	return -1;
7ced9e9f GH	403	}
54d208ff GH	404
54d208ff GH	405	qemu_egl_mode = gles ? DISPLAYGL_MODE_ES : DISPLAYGL_MODE_CORE;
7ced9e9f GH	406	return 0;
	407	}
	408
54d208ff	409	int qemu_egl_init_dpy_x11(EGLNativeDisplayType dpy, DisplayGLMode mode)
e1913dbb GH	410	{
e1913dbb GH	411	#ifdef EGL_KHR_platform_x11
54d208ff	412	return qemu_egl_init_dpy(dpy, EGL_PLATFORM_X11_KHR, mode);
e1913dbb	413	#else
54d208ff	414	return qemu_egl_init_dpy(dpy, 0, mode);
e1913dbb GH	415	#endif
	416	}
	417
54d208ff	418	int qemu_egl_init_dpy_mesa(EGLNativeDisplayType dpy, DisplayGLMode mode)
e1913dbb GH	419	{
e1913dbb GH	420	#ifdef EGL_MESA_platform_gbm
54d208ff	421	return qemu_egl_init_dpy(dpy, EGL_PLATFORM_GBM_MESA, mode);
e1913dbb	422	#else
54d208ff	423	return qemu_egl_init_dpy(dpy, 0, mode);
e1913dbb GH	424	#endif
	425	}
	426
7ced9e9f GH	427	EGLContext qemu_egl_init_ctx(void)
7ced9e9f GH	428	{
54d208ff	429	static const EGLint ctx_att_core[] = {
bc8c946f	430	EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
7ced9e9f GH	431	EGL_NONE
7ced9e9f GH	432	};
54d208ff GH	433	static const EGLint ctx_att_gles[] = {
	434	EGL_CONTEXT_CLIENT_VERSION, 2,
	435	EGL_NONE
	436	};
	437	bool gles = (qemu_egl_mode == DISPLAYGL_MODE_ES);
7ced9e9f GH	438	EGLContext ectx;
	439	EGLBoolean b;
	440
7ced9e9f	441	ectx = eglCreateContext(qemu_egl_display, qemu_egl_config, EGL_NO_CONTEXT,
54d208ff	442	gles ? ctx_att_gles : ctx_att_core);
7ced9e9f	443	if (ectx == EGL_NO_CONTEXT) {
38a55bdd	444	error_report("egl: eglCreateContext failed");
7ced9e9f GH	445	return NULL;
	446	}
	447
	448	b = eglMakeCurrent(qemu_egl_display, EGL_NO_SURFACE, EGL_NO_SURFACE, ectx);
	449	if (b == EGL_FALSE) {
38a55bdd	450	error_report("egl: eglMakeCurrent failed");
7ced9e9f GH	451	return NULL;
	452	}
	453
	454	return ectx;
	455	}