mpv/video/out/opengl/context_w32.c

343 lines
9.1 KiB
C

/*
* 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 <assert.h>
#include <windows.h>
#include <dwmapi.h>
#include "options/m_config.h"
#include "video/out/w32_common.h"
#include "video/out/win32/exclusive_hack.h"
#include "context.h"
struct w32_context {
int opt_swapinterval;
int current_swapinterval;
int (GLAPIENTRY *real_wglSwapInterval)(int);
HGLRC context;
HDC hdc;
int flags;
};
static void w32_uninit(MPGLContext *ctx);
static __thread struct w32_context *current_w32_context;
static int GLAPIENTRY w32_swap_interval(int interval)
{
if (current_w32_context)
current_w32_context->opt_swapinterval = interval;
return 0;
}
static bool create_dc(struct MPGLContext *ctx, int flags)
{
struct w32_context *w32_ctx = ctx->priv;
HWND win = vo_w32_hwnd(ctx->vo);
if (w32_ctx->hdc)
return true;
HDC hdc = GetDC(win);
if (!hdc)
return false;
PIXELFORMATDESCRIPTOR pfd;
memset(&pfd, 0, sizeof pfd);
pfd.nSize = sizeof pfd;
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.iLayerType = PFD_MAIN_PLANE;
int pf = ChoosePixelFormat(hdc, &pfd);
if (!pf) {
MP_ERR(ctx->vo, "unable to select a valid pixel format!\n");
ReleaseDC(win, hdc);
return false;
}
SetPixelFormat(hdc, pf, &pfd);
w32_ctx->hdc = hdc;
return true;
}
static void *w32gpa(const GLubyte *procName)
{
HMODULE oglmod;
void *res = wglGetProcAddress(procName);
if (res)
return res;
oglmod = GetModuleHandle(L"opengl32.dll");
return GetProcAddress(oglmod, procName);
}
static bool create_context_w32_old(struct MPGLContext *ctx)
{
struct w32_context *w32_ctx = ctx->priv;
HDC windc = w32_ctx->hdc;
bool res = false;
HGLRC context = wglCreateContext(windc);
if (!context) {
MP_FATAL(ctx->vo, "Could not create GL context!\n");
return res;
}
if (!wglMakeCurrent(windc, context)) {
MP_FATAL(ctx->vo, "Could not set GL context!\n");
wglDeleteContext(context);
return res;
}
w32_ctx->context = context;
mpgl_load_functions(ctx->gl, w32gpa, NULL, ctx->vo->log);
return true;
}
static bool create_context_w32_gl3(struct MPGLContext *ctx)
{
struct w32_context *w32_ctx = ctx->priv;
HDC windc = w32_ctx->hdc;
HGLRC context = 0;
// A legacy context is needed to get access to the new functions.
HGLRC legacy_context = wglCreateContext(windc);
if (!legacy_context) {
MP_FATAL(ctx->vo, "Could not create GL context!\n");
return false;
}
// set context
if (!wglMakeCurrent(windc, legacy_context)) {
MP_FATAL(ctx->vo, "Could not set GL context!\n");
goto out;
}
const char *(GLAPIENTRY *wglGetExtensionsStringARB)(HDC hdc)
= w32gpa((const GLubyte*)"wglGetExtensionsStringARB");
if (!wglGetExtensionsStringARB)
goto unsupported;
const char *wgl_exts = wglGetExtensionsStringARB(windc);
if (!strstr(wgl_exts, "WGL_ARB_create_context"))
goto unsupported;
HGLRC (GLAPIENTRY *wglCreateContextAttribsARB)(HDC hDC, HGLRC hShareContext,
const int *attribList)
= w32gpa((const GLubyte*)"wglCreateContextAttribsARB");
if (!wglCreateContextAttribsARB)
goto unsupported;
int attribs[] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, 3,
WGL_CONTEXT_MINOR_VERSION_ARB, 0,
WGL_CONTEXT_FLAGS_ARB, 0,
WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
0
};
context = wglCreateContextAttribsARB(windc, 0, attribs);
if (!context) {
// NVidia, instead of ignoring WGL_CONTEXT_FLAGS_ARB, will error out if
// it's present on pre-3.2 contexts.
// Remove it from attribs and retry the context creation.
attribs[6] = attribs[7] = 0;
context = wglCreateContextAttribsARB(windc, 0, attribs);
}
if (!context) {
int err = GetLastError();
MP_FATAL(ctx->vo, "Could not create an OpenGL 3.x context: error 0x%x\n", err);
goto out;
}
wglMakeCurrent(windc, NULL);
wglDeleteContext(legacy_context);
if (!wglMakeCurrent(windc, context)) {
MP_FATAL(ctx->vo, "Could not set GL3 context!\n");
wglDeleteContext(context);
return false;
}
w32_ctx->context = context;
/* update function pointers */
mpgl_load_functions(ctx->gl, w32gpa, NULL, ctx->vo->log);
return true;
unsupported:
MP_ERR(ctx->vo, "The OpenGL driver does not support OpenGL 3.x \n");
out:
wglMakeCurrent(windc, NULL);
wglDeleteContext(legacy_context);
return false;
}
static void create_ctx(void *ptr)
{
struct MPGLContext *ctx = ptr;
struct w32_context *w32_ctx = ctx->priv;
if (!create_dc(ctx, w32_ctx->flags))
return;
create_context_w32_gl3(ctx);
if (!w32_ctx->context)
create_context_w32_old(ctx);
wglMakeCurrent(w32_ctx->hdc, NULL);
}
static int w32_init(struct MPGLContext *ctx, int flags)
{
if (!vo_w32_init(ctx->vo))
goto fail;
struct w32_context *w32_ctx = ctx->priv;
w32_ctx->flags = flags;
vo_w32_run_on_thread(ctx->vo, create_ctx, ctx);
if (!w32_ctx->context)
goto fail;
if (!ctx->gl->SwapInterval)
MP_VERBOSE(ctx->vo, "WGL_EXT_swap_control missing.\n");
w32_ctx->real_wglSwapInterval = ctx->gl->SwapInterval;
ctx->gl->SwapInterval = w32_swap_interval;
w32_ctx->current_swapinterval = -1;
current_w32_context = w32_ctx;
wglMakeCurrent(w32_ctx->hdc, w32_ctx->context);
DwmEnableMMCSS(TRUE);
return 0;
fail:
w32_uninit(ctx);
return -1;
}
static int w32_reconfig(struct MPGLContext *ctx)
{
vo_w32_config(ctx->vo);
return 0;
}
static void destroy_gl(void *ptr)
{
struct MPGLContext *ctx = ptr;
struct w32_context *w32_ctx = ctx->priv;
if (w32_ctx->context)
wglDeleteContext(w32_ctx->context);
w32_ctx->context = 0;
if (w32_ctx->hdc)
ReleaseDC(vo_w32_hwnd(ctx->vo), w32_ctx->hdc);
w32_ctx->hdc = NULL;
current_w32_context = NULL;
}
static void w32_uninit(MPGLContext *ctx)
{
struct w32_context *w32_ctx = ctx->priv;
if (w32_ctx->context)
wglMakeCurrent(w32_ctx->hdc, 0);
vo_w32_run_on_thread(ctx->vo, destroy_gl, ctx);
DwmEnableMMCSS(FALSE);
vo_w32_uninit(ctx->vo);
}
static bool compositor_active(MPGLContext *ctx)
{
// For Windows 7.
BOOL enabled = 0;
if (FAILED(DwmIsCompositionEnabled(&enabled)) || !enabled)
return false;
// This works at least on Windows 8.1: it returns an error in fullscreen,
// which is also when we get consistent timings without DwmFlush. Might
// be cargo-cult.
DWM_TIMING_INFO info = { .cbSize = sizeof(DWM_TIMING_INFO) };
if (FAILED(DwmGetCompositionTimingInfo(0, &info)))
return false;
// Test if a program is running in exclusive fullscreen mode. If so, it's
// probably this one, so it's not getting redirected by the compositor.
if (mp_w32_is_in_exclusive_mode())
return false;
return true;
}
static void w32_swap_buffers(MPGLContext *ctx)
{
struct w32_context *w32_ctx = ctx->priv;
SwapBuffers(w32_ctx->hdc);
// default if we don't DwmFLush
int new_swapinterval = w32_ctx->opt_swapinterval;
int dwm_flush_opt;
mp_read_option_raw(ctx->global, "opengl-dwmflush", &m_option_type_choice,
&dwm_flush_opt);
if (dwm_flush_opt >= 0) {
if ((dwm_flush_opt == 1 && !ctx->vo->opts->fullscreen) ||
(dwm_flush_opt == 2) ||
(dwm_flush_opt == 0 && compositor_active(ctx)))
{
if (DwmFlush() == S_OK)
new_swapinterval = 0;
}
}
if (new_swapinterval != w32_ctx->current_swapinterval &&
w32_ctx->real_wglSwapInterval)
{
w32_ctx->real_wglSwapInterval(new_swapinterval);
MP_VERBOSE(ctx->vo, "set SwapInterval(%d)\n", new_swapinterval);
}
w32_ctx->current_swapinterval = new_swapinterval;
}
static int w32_control(MPGLContext *ctx, int *events, int request, void *arg)
{
return vo_w32_control(ctx->vo, events, request, arg);
}
const struct mpgl_driver mpgl_driver_w32 = {
.name = "win",
.priv_size = sizeof(struct w32_context),
.init = w32_init,
.reconfig = w32_reconfig,
.swap_buffers = w32_swap_buffers,
.control = w32_control,
.uninit = w32_uninit,
};