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[win32 surface sharing] hacky proof of concept

This commit is contained in:
martinfouilleul 2023-03-02 18:24:15 +01:00
parent 3ada8ece9a
commit ee87976429
8 changed files with 208 additions and 117 deletions
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4
examples/surface_sharing/build.bat Normal file
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@ -0,0 +1,4 @@
set INCLUDES=/I ..\..\src /I ..\..\src\util /I ..\..\src\platform /I ../../ext /I ../../ext/angle_headers
cl /we4013 /Zi /Zc:preprocessor /std:c11 %INCLUDES% main.c /link /LIBPATH:../../bin milepost.dll.lib /out:../../bin/example_surface_sharing.exe

14
examples/surface_sharing/main.c
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@ -100,8 +100,12 @@ int child_main(int writeFd)
mp_rect rect = {.x = 100, .y = 100, .w = 800, .h = 600};
mp_window window = mp_window_create(rect, "test", 0);
//NOTE: create surface server
mg_surface_server server = mg_surface_server_create();
mg_surface_connection_id connectionID = mg_surface_server_id(server);
//NOTE: create surface
mg_surface surface = mg_surface_create_for_window(window, MG_BACKEND_GLES);
mg_surface surface = mg_surface_create_for_sharing(server, MG_BACKEND_GLES);
mg_surface_prepare(surface);
//NOTE: init shader and gl state
@ -144,10 +148,6 @@ int child_main(int writeFd)
glUseProgram(program);
//NOTE: create surface server and start sharing surface
mg_surface_server server = mg_surface_server_create();
mg_surface_connection_id connectionID = mg_surface_server_start(server, surface);
//NOTE: send context id to parent
write(writeFd, &connectionID, sizeof(connectionID));
@ -172,6 +172,10 @@ int child_main(int writeFd)
mg_surface_prepare(surface);
mp_rect rect = mg_surface_get_frame(surface);
vec2 scaling = mg_surface_contents_scaling(surface);
glViewport(0, 0, rect.w*scaling.x, rect.h*scaling.y);
glClearColor(0.3, 0.3, 1, 1);
glClear(GL_COLOR_BUFFER_BIT);

49
src/egl_surface.c
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@ -120,15 +120,12 @@ void* mg_egl_surface_native_layer(mg_surface_data* interface)
return(mp_layer_native_surface(&surface->layer));
}
mg_surface_data* mg_egl_surface_create_for_window(mp_window window)
{
mg_egl_surface* surface = 0;
mp_window_data* windowData = mp_window_ptr_from_handle(window);
if(windowData)
{
surface = malloc_type(mg_egl_surface);
memset(surface, 0, sizeof(mg_egl_surface));
//////////////////////////
// PIGMODE
//////////////////////////
void mg_egl_surface_init_for_native(mg_egl_surface* surface, void* nativeSurface)
{
surface->interface.backend = MG_BACKEND_GLES;
surface->interface.destroy = mg_egl_surface_destroy;
surface->interface.prepare = mg_egl_surface_prepare;
@ -141,8 +138,6 @@ mg_surface_data* mg_egl_surface_create_for_window(mp_window window)
surface->interface.setHidden = mg_egl_surface_set_hidden;
surface->interface.nativeLayer = mg_egl_surface_native_layer;
mp_layer_init_for_window(&surface->layer, windowData);
EGLAttrib displayAttribs[] = {
EGL_PLATFORM_ANGLE_TYPE_ANGLE, MG_EGL_PLATFORM_ANGLE_TYPE,
EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE, EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE,
@ -188,6 +183,40 @@ mg_surface_data* mg_egl_surface_create_for_window(mp_window window)
mg_gl_load_gles(&surface->api, (mg_gl_load_proc)eglGetProcAddress);
eglSwapInterval(surface->eglDisplay, 1);
}
mg_surface_data* mg_egl_surface_create_for_sharing(mg_surface_server handle)
{
mg_egl_surface* surface = 0;
mg_surface_server_data* server = mg_surface_server_data_from_handle(handle);
if(server)
{
surface = malloc_type(mg_egl_surface);
if(surface)
{
memset(surface, 0, sizeof(mg_egl_surface));
surface->layer = server->layer;
mg_egl_surface_init_for_native(surface, mp_layer_native_surface(&surface->layer));
}
}
return((mg_surface_data*)surface);
}
mg_surface_data* mg_egl_surface_create_for_window(mp_window window)
{
mg_egl_surface* surface = 0;
mp_window_data* windowData = mp_window_ptr_from_handle(window);
if(windowData)
{
surface = malloc_type(mg_egl_surface);
if(surface)
{
memset(surface, 0, sizeof(mg_egl_surface));
mp_layer_init_for_window(&surface->layer, windowData);
mg_egl_surface_init_for_native(surface, mp_layer_native_surface(&surface->layer));
}
}
return((mg_surface_data*)surface);
}

1
src/egl_surface.h
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@ -13,5 +13,6 @@
#include"mp_app.h"
mg_surface_data* mg_egl_surface_create_for_window(mp_window window);
mg_surface_data* mg_egl_surface_create_for_sharing(mg_surface_server handle);
#endif // __EGL_SURFACE_H_

28
src/graphics.c
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@ -459,6 +459,34 @@ mg_surface mg_surface_create_for_window(mp_window window, mg_backend_id backend)
return(surfaceHandle);
}
mg_surface mg_surface_create_for_sharing(mg_surface_server server, mg_backend_id backend)
{
if(__mgData.init)
{
mg_init();
}
mg_surface surfaceHandle = mg_surface_nil();
mg_surface_data* surface = 0;
switch(backend)
{
#if MG_COMPILE_BACKEND_GLES
case MG_BACKEND_GLES:
surface = mg_egl_surface_create_for_sharing(server);
break;
#endif
default:
break;
}
if(surface)
{
surfaceHandle = mg_surface_handle_alloc(surface);
}
return(surfaceHandle);
}
void mg_surface_destroy(mg_surface handle)
{
DEBUG_ASSERT(__mgData.init);

8
src/graphics.h
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@ -103,7 +103,7 @@ MP_API bool mg_surface_get_hidden(mg_surface surface);
MP_API void mg_surface_set_hidden(mg_surface surface, bool hidden);
//------------------------------------------------------------------------------------------
//NOTE(martin): surface server/client
//NOTE(martin): surface sharing
//------------------------------------------------------------------------------------------
typedef struct mg_surface_server { u64 h; } mg_surface_server;
@ -111,12 +111,12 @@ typedef u64 mg_surface_connection_id;
MP_API mg_surface_server mg_surface_server_create(void);
MP_API void mg_surface_server_destroy(mg_surface_server server);
MP_API mg_surface_connection_id mg_surface_server_start(mg_surface_server server, mg_surface surface);
MP_API void mg_surface_server_stop(mg_surface_server server);
MP_API mg_surface_connection_id mg_surface_server_id(mg_surface_server server);
MP_API mg_surface mg_surface_create_for_sharing(mg_surface_server server, mg_backend_id backend);
MP_API mg_surface mg_surface_client_create_for_window(mp_window window);
MP_API void mg_surface_client_connect(mg_surface surface, mg_surface_connection_id id);
MP_API void mg_surface_client_disconnect(mg_surface surface);
//------------------------------------------------------------------------------------------
//NOTE(martin): graphics canvas structs

8
src/graphics_internal.h
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@ -15,6 +15,14 @@
extern "C" {
#endif
typedef struct mg_surface_server_data
{
mp_layer layer;
} mg_surface_server_data;
mg_surface_server_data* mg_surface_server_data_from_handle(mg_surface_server handle);
//---------------------------------------------------------------
// surface interface
//---------------------------------------------------------------

113
src/win32_surface_sharing.c
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@ -12,11 +12,6 @@
// Surface server
//------------------------------------------------------------------------------------------------
typedef struct mg_surface_server_data
{
int dummy;
} mg_surface_server_data;
mg_surface_server_data* mg_surface_server_data_from_handle(mg_surface_server handle)
{
mg_surface_server_data* server = (mg_surface_server_data*)mg_data_from_handle(MG_HANDLE_SURFACE_SERVER, handle.h);
@ -27,8 +22,50 @@ MP_API mg_surface_server mg_surface_server_create(void)
{
mg_surface_server_data* server = malloc_type(mg_surface_server_data);
//TODO
//NOTE(martin): create a child window for the surface
WNDCLASS layerWindowClass = {.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC,
.lpfnWndProc = DefWindowProc,
.hInstance = GetModuleHandleW(NULL),
.lpszClassName = "server_layer_window_class",
.hCursor = LoadCursor(0, IDC_ARROW)};
RegisterClass(&layerWindowClass);
// RECT parentRect;
// GetClientRect(window->win32.hWnd, &parentRect);
// int width = parentRect.right - parentRect.left;
// int height = parentRect.bottom - parentRect.top;
int width = 200;
int height = 200;
//NOTE(martin): create dummy window
HWND dummyParent = CreateWindow("server_layer_window_class", "layerParent",
WS_OVERLAPPED,
0, 0, width, height,
0,
0,
layerWindowClass.hInstance,
0);
server->layer.hWnd = CreateWindowEx(WS_EX_NOACTIVATE,
"server_layer_window_class", "layer",
WS_CHILD,
0, 0, width, height,
dummyParent,
0,
layerWindowClass.hInstance,
0);
SetParent(server->layer.hWnd, 0);
DestroyWindow(dummyParent);
/*
mp_window window = mp_window_create((mp_rect){0, 0, 100, 100}, "server", 0);
mp_layer_init_for_window(&server->layer, mp_window_ptr_from_handle(window));
*/
mg_surface_server handle = (mg_surface_server){mg_handle_alloc(MG_HANDLE_SURFACE_SERVER, (void*)server)};
return(handle);
}
@ -45,7 +82,7 @@ MP_API void mg_surface_server_destroy(mg_surface_server handle)
}
}
MP_API mg_surface_connection_id mg_surface_server_start(mg_surface_server handle, mg_surface surface)
MP_API mg_surface_connection_id mg_surface_server_id(mg_surface_server handle)
{
mg_surface_connection_id res = 0;
@ -53,20 +90,13 @@ MP_API mg_surface_connection_id mg_surface_server_start(mg_surface_server handle
if(server)
{
//NOTE: just a quick test
res = (u64)mg_surface_native_layer(surface);
HWND layerWindow = (HWND)mp_layer_native_surface(&server->layer);
res = (mg_surface_connection_id)layerWindow;
//res = (mg_surface_connection_id)GetParent(layerWindow);
}
return(res);
}
MP_API void mg_surface_server_stop(mg_surface_server handle)
{
mg_surface_server_data* server = mg_surface_server_data_from_handle(handle);
if(server)
{
//TODO
}
}
//------------------------------------------------------------------------------------------------
// Surface client
//------------------------------------------------------------------------------------------------
@ -76,34 +106,13 @@ typedef struct mg_win32_surface_client
mg_surface_data interface;
mp_layer layer;
HWND remoteWnd;
} mg_win32_surface_client;
void mg_win32_surface_client_prepare(mg_surface_data* interface)
{}
void mg_win32_surface_client_present(mg_surface_data* interface)
{
mg_win32_surface_client* surface = (mg_win32_surface_client*)interface;
HWND dstWindow = (HWND)mp_layer_native_surface(&surface->layer);
RECT dstRect;
GetClientRect(dstWindow, &dstRect);
HDC dstDC = GetDC(dstWindow);
HDC srcDC = GetDC(surface->remoteWnd);
int res = BitBlt(dstDC,
dstRect.left,
dstRect.top,
dstRect.right - dstRect.left,
dstRect.bottom - dstRect.top,
srcDC,
0,
0,
SRCCOPY);
}
{}
void mg_win32_surface_client_swap_interval(mg_surface_data* interface, int swap)
{
@ -209,15 +218,23 @@ MP_API void mg_surface_client_connect(mg_surface handle, mg_surface_connection_i
mg_win32_surface_client* surface = (mg_win32_surface_client*)interface;
//NOTE:Quick test
surface->remoteWnd = (HWND)ID;
}
}
HWND dstWnd = mp_layer_native_surface(&surface->layer);
HWND srcWnd = (HWND)ID;
RECT dstRect;
GetClientRect(dstWnd, &dstRect);
SetParent(srcWnd, dstWnd);
ShowWindow(srcWnd, SW_NORMAL);
// SetWindowLongPtr(srcWnd, GWL_STYLE, WS_CHILD|WS_VISIBLE);
SetWindowPos(srcWnd,
HWND_TOP,
0,
0,
dstRect.right - dstRect.left,
dstRect.bottom - dstRect.top,
SWP_NOACTIVATE | SWP_NOZORDER);
MP_API void mg_surface_client_disconnect(mg_surface handle)
{
mg_surface_data* interface = mg_surface_data_from_handle(handle);
if(interface && interface->backend == MG_BACKEND_REMOTE)
{
//TODO
}
}