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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "options/m_config.h"
#include "context.h"
#include "ra_gl.h"
#include "utils.h"
// 0-terminated list of desktop GL versions a backend should try to
// initialize. The first entry is the most preferred version.
const int mpgl_preferred_gl_versions[] = {
440,
430,
400,
330,
320,
310,
300,
210,
0
};
enum {
FLUSH_NO = 0,
FLUSH_YES,
FLUSH_AUTO,
};
enum {
GLES_AUTO = 0,
GLES_YES,
GLES_NO,
};
struct opengl_opts {
int use_glfinish;
int waitvsync;
int vsync_pattern[2];
int swapinterval;
int early_flush;
int restrict_version;
int gles_mode;
};
#define OPT_BASE_STRUCT struct opengl_opts
const struct m_sub_options opengl_conf = {
.opts = (const struct m_option[]) {
OPT_FLAG("opengl-glfinish", use_glfinish, 0),
OPT_FLAG("opengl-waitvsync", waitvsync, 0),
OPT_INT("opengl-swapinterval", swapinterval, 0),
OPT_INTPAIR("opengl-check-pattern", vsync_pattern, 0),
OPT_INT("opengl-restrict", restrict_version, 0),
OPT_CHOICE("opengl-es", gles_mode, 0,
({"auto", GLES_AUTO}, {"yes", GLES_YES}, {"no", GLES_NO})),
OPT_CHOICE("opengl-early-flush", early_flush, 0,
({"no", FLUSH_NO}, {"yes", FLUSH_YES}, {"auto", FLUSH_AUTO})),
OPT_REPLACED("opengl-debug", "gpu-debug"),
OPT_REPLACED("opengl-sw", "gpu-sw"),
OPT_REPLACED("opengl-vsync-fences", "swapchain-depth"),
OPT_REPLACED("opengl-backend", "gpu-context"),
{0},
},
.defaults = &(const struct opengl_opts) {
.swapinterval = 1,
},
.size = sizeof(struct opengl_opts),
};
struct priv {
GL *gl;
struct mp_log *log;
struct ra_gl_ctx_params params;
struct opengl_opts *opts;
struct ra_swapchain_fns fns;
GLuint main_fb;
struct ra_tex *wrapped_fb; // corresponds to main_fb
// for debugging:
int frames_rendered;
unsigned int prev_sgi_sync_count;
// for gl_vsync_pattern
int last_pattern;
int matches, mismatches;
// for swapchain_depth simulation
GLsync *vsync_fences;
int num_vsync_fences;
};
bool ra_gl_ctx_test_version(struct ra_ctx *ctx, int version, bool es)
{
bool ret;
struct opengl_opts *opts;
void *tmp = talloc_new(NULL);
opts = mp_get_config_group(tmp, ctx->global, &opengl_conf);
// Version too high
if (opts->restrict_version && version >= opts->restrict_version) {
ret = false;
goto done;
}
switch (opts->gles_mode) {
case GLES_YES: ret = es; goto done;
case GLES_NO: ret = !es; goto done;
case GLES_AUTO: ret = true; goto done;
default: abort();
}
done:
talloc_free(tmp);
return ret;
}
static void *get_native_display(void *priv, const char *name)
{
struct priv *p = priv;
if (!p->params.native_display_type || !name)
return NULL;
if (strcmp(p->params.native_display_type, name) != 0)
return NULL;
return p->params.native_display;
}
void ra_gl_ctx_uninit(struct ra_ctx *ctx)
{
if (ctx->swapchain) {
struct priv *p = ctx->swapchain->priv;
if (ctx->ra && p->wrapped_fb)
ra_tex_free(ctx->ra, &p->wrapped_fb);
talloc_free(ctx->swapchain);
ctx->swapchain = NULL;
}
ra_free(&ctx->ra);
}
static const struct ra_swapchain_fns ra_gl_swapchain_fns;
bool ra_gl_ctx_init(struct ra_ctx *ctx, GL *gl, struct ra_gl_ctx_params params)
{
struct ra_swapchain *sw = ctx->swapchain = talloc_ptrtype(NULL, sw);
*sw = (struct ra_swapchain) {
.ctx = ctx,
};
struct priv *p = sw->priv = talloc_ptrtype(sw, p);
*p = (struct priv) {
.gl = gl,
.log = ctx->log,
.params = params,
.opts = mp_get_config_group(p, ctx->global, &opengl_conf),
.fns = ra_gl_swapchain_fns,
};
sw->fns = &p->fns;
const struct ra_swapchain_fns *ext = p->params.external_swapchain;
if (ext) {
if (ext->color_depth)
p->fns.color_depth = ext->color_depth;
if (ext->screenshot)
p->fns.screenshot = ext->screenshot;
if (ext->start_frame)
p->fns.start_frame = ext->start_frame;
if (ext->submit_frame)
p->fns.submit_frame = ext->submit_frame;
if (ext->swap_buffers)
p->fns.swap_buffers = ext->swap_buffers;
}
if (!gl->version && !gl->es)
return false;
if (gl->mpgl_caps & MPGL_CAP_SW) {
MP_WARN(p, "Suspected software renderer or indirect context.\n");
if (ctx->opts.probing && !ctx->opts.allow_sw)
return false;
}
gl->debug_context = ctx->opts.debug;
gl->get_native_display_ctx = p;
gl->get_native_display = get_native_display;
if (gl->SwapInterval) {
gl->SwapInterval(p->opts->swapinterval);
} else {
MP_VERBOSE(p, "GL_*_swap_control extension missing.\n");
}
ctx->ra = ra_create_gl(p->gl, ctx->log);
return !!ctx->ra;
}
void ra_gl_ctx_resize(struct ra_swapchain *sw, int w, int h, int fbo)
{
struct priv *p = sw->priv;
if (p->main_fb == fbo && p->wrapped_fb && p->wrapped_fb->params.w == w
&& p->wrapped_fb->params.h == h)
return;
if (p->wrapped_fb)
ra_tex_free(sw->ctx->ra, &p->wrapped_fb);
p->main_fb = fbo;
p->wrapped_fb = ra_create_wrapped_fb(sw->ctx->ra, fbo, w, h);
}
int ra_gl_ctx_color_depth(struct ra_swapchain *sw)
{
struct priv *p = sw->priv;
GL *gl = p->gl;
if (!p->wrapped_fb)
return 0;
if ((gl->es < 300 && !gl->version) || !(gl->mpgl_caps & MPGL_CAP_FB))
return 0;
gl->BindFramebuffer(GL_FRAMEBUFFER, p->main_fb);
GLenum obj = gl->version ? GL_BACK_LEFT : GL_BACK;
if (p->main_fb)
obj = GL_COLOR_ATTACHMENT0;
GLint depth_g = 0;
gl->GetFramebufferAttachmentParameteriv(GL_FRAMEBUFFER, obj,
GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE, &depth_g);
gl->BindFramebuffer(GL_FRAMEBUFFER, 0);
return depth_g;
}
struct mp_image *ra_gl_ctx_screenshot(struct ra_swapchain *sw)
{
struct priv *p = sw->priv;
assert(p->wrapped_fb);
struct mp_image *screen = gl_read_fbo_contents(p->gl, p->main_fb,
p->wrapped_fb->params.w,
p->wrapped_fb->params.h);
// OpenGL FB is also read in flipped order, so we need to flip when the
// rendering is *not* flipped, which in our case is whenever
// p->params.flipped is true. I hope that made sense
if (screen && p->params.flipped)
mp_image_vflip(screen);
return screen;
}
bool ra_gl_ctx_start_frame(struct ra_swapchain *sw, struct ra_fbo *out_fbo)
{
struct priv *p = sw->priv;
out_fbo->tex = p->wrapped_fb;
out_fbo->flip = !p->params.flipped; // OpenGL FBs are normally flipped
return true;
}
bool ra_gl_ctx_submit_frame(struct ra_swapchain *sw, const struct vo_frame *frame)
{
struct priv *p = sw->priv;
GL *gl = p->gl;
if (p->opts->use_glfinish)
gl->Finish();
if (gl->FenceSync && !p->params.external_swapchain) {
GLsync fence = gl->FenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
if (fence)
MP_TARRAY_APPEND(p, p->vsync_fences, p->num_vsync_fences, fence);
}
switch (p->opts->early_flush) {
case FLUSH_AUTO:
if (frame->display_synced)
break;
// fall through
case FLUSH_YES:
gl->Flush();
}
return true;
}
static void check_pattern(struct priv *p, int item)
{
int expected = p->opts->vsync_pattern[p->last_pattern];
if (item == expected) {
p->last_pattern++;
if (p->last_pattern >= 2)
p->last_pattern = 0;
p->matches++;
} else {
p->mismatches++;
MP_WARN(p, "wrong pattern, expected %d got %d (hit: %d, mis: %d)\n",
expected, item, p->matches, p->mismatches);
}
}
void ra_gl_ctx_swap_buffers(struct ra_swapchain *sw)
{
struct priv *p = sw->priv;
GL *gl = p->gl;
p->params.swap_buffers(sw->ctx);
p->frames_rendered++;
if (p->frames_rendered > 5 && !sw->ctx->opts.debug)
ra_gl_set_debug(sw->ctx->ra, false);
if ((p->opts->waitvsync || p->opts->vsync_pattern[0])
&& gl->GetVideoSync)
{
unsigned int n1 = 0, n2 = 0;
gl->GetVideoSync(&n1);
if (p->opts->waitvsync)
gl->WaitVideoSync(2, (n1 + 1) % 2, &n2);
int step = n1 - p->prev_sgi_sync_count;
p->prev_sgi_sync_count = n1;
MP_DBG(p, "Flip counts: %u->%u, step=%d\n", n1, n2, step);
if (p->opts->vsync_pattern[0])
check_pattern(p, step);
}
while (p->num_vsync_fences >= sw->ctx->opts.swapchain_depth) {
gl->ClientWaitSync(p->vsync_fences[0], GL_SYNC_FLUSH_COMMANDS_BIT, 1e9);
gl->DeleteSync(p->vsync_fences[0]);
MP_TARRAY_REMOVE_AT(p->vsync_fences, p->num_vsync_fences, 0);
}
}
static const struct ra_swapchain_fns ra_gl_swapchain_fns = {
.color_depth = ra_gl_ctx_color_depth,
.screenshot = ra_gl_ctx_screenshot,
.start_frame = ra_gl_ctx_start_frame,
.submit_frame = ra_gl_ctx_submit_frame,
.swap_buffers = ra_gl_ctx_swap_buffers,
};
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