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 bool create_context_w32_gl3(struct MPGLContext *ctx)
{
struct w32_context *w32_ctx = ctx->priv;
HGLRC *context = &w32_ctx->context;
if (*context) // reuse existing context
return true; // not reusing it breaks gl3!
HWND win = ctx->vo->w32->window;
HDC windc = GetDC(win);
HGLRC new_context = 0;
new_context = wglCreateContext(windc);
if (!new_context) {
MP_FATAL(ctx->vo, "Could not create GL context!\n");
return false;
}
// set context
if (!wglMakeCurrent(windc, new_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 gl_version = ctx->requested_gl_version;
int attribs[] = {
WGL_CONTEXT_MAJOR_VERSION_ARB, MPGL_VER_GET_MAJOR(gl_version),
WGL_CONTEXT_MINOR_VERSION_ARB, MPGL_VER_GET_MINOR(gl_version),
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(NULL, NULL);
wglDeleteContext(new_context);
if (!wglMakeCurrent(windc, *context)) {
MP_FATAL(ctx->vo, "Could not set GL3 context!\n");
wglDeleteContext(*context);
return false;
}
/* update function pointers */
mpgl_load_functions(ctx->gl, w32gpa, NULL, ctx->vo->log);
int pfmt = GetPixelFormat(windc);
PIXELFORMATDESCRIPTOR pfd;
if (DescribePixelFormat(windc, pfmt, sizeof(PIXELFORMATDESCRIPTOR), &pfd)) {
ctx->depth_r = pfd.cRedBits;
ctx->depth_g = pfd.cGreenBits;
ctx->depth_b = pfd.cBlueBits;
}
return true;
unsupported:
MP_ERR(ctx->vo, "The current OpenGL implementation does not support OpenGL 3.x \n");
out:
wglDeleteContext(new_context);
return false;
}
