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doc: D3D9 callbacks: set the rendering size when the window size changes

This commit is contained in:
Steve Lhomme 2019-05-13 13:35:41 +02:00
parent cfaf7134b4
commit 5c2e5221f5
1 changed files with 49 additions and 2 deletions
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51
doc/libvlc/d3d9_player.c
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@ -34,6 +34,11 @@ struct render_context
IDirect3DSurface9 *backBuffer;
IDirect3DVertexBuffer9 *rectangleFVFVertexBuf;
CRITICAL_SECTION sizeLock; // the ReportSize callback cannot be called during/after the Cleanup_cb is called
unsigned width, height;
void (*ReportSize)(void *ReportOpaque, unsigned width, unsigned height);
void *ReportOpaque;
};
struct CUSTOMVERTEX {FLOAT X, Y, Z, RHW; DWORD COLOR;
@ -238,6 +243,17 @@ static bool Setup_cb( void **opaque, const libvlc_video_direct3d_device_cfg_t *c
{
struct render_context *ctx = *opaque;
out->device_context = ctx->libvlc_d3d;
EnterCriticalSection(&ctx->sizeLock);
ctx->ReportSize = cfg->report_size_change;
ctx->ReportOpaque = cfg->report_opaque;
if (ctx->ReportSize != NULL)
{
/* report our initial size */
ctx->ReportSize(ctx->ReportOpaque, ctx->width, ctx->height);
}
LeaveCriticalSection(&ctx->sizeLock);
return true;
}
@ -245,6 +261,9 @@ static void Cleanup_cb( void *opaque )
{
/* here we can release all things Direct3D9 for good (if playing only one file) */
struct render_context *ctx = opaque;
EnterCriticalSection(&ctx->sizeLock);
ctx->ReportSize = NULL;
LeaveCriticalSection(&ctx->sizeLock);
}
static bool UpdateOutput_cb( void *opaque, const libvlc_video_direct3d_cfg_t *cfg, libvlc_video_output_cfg_t *out )
@ -273,8 +292,33 @@ static bool StartRendering_cb( void *opaque, bool enter, const libvlc_video_dire
static LRESULT CALLBACK WindowProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
if( message == WM_CREATE )
{
/* Store p_mp for future use */
CREATESTRUCT *c = (CREATESTRUCT *)lParam;
SetWindowLongPtr( hWnd, GWLP_USERDATA, (LONG_PTR)c->lpCreateParams );
return 0;
}
LONG_PTR p_user_data = GetWindowLongPtr( hWnd, GWLP_USERDATA );
if( p_user_data == 0 )
return DefWindowProc(hWnd, message, wParam, lParam);
struct render_context *ctx = (struct render_context *)p_user_data;
switch(message)
{
case WM_SIZE:
{
/* tell libvlc that our size has changed */
ctx->width = (BORDER_RIGHT - BORDER_LEFT) * LOWORD(lParam) / SCREEN_WIDTH; /* remove the orange part ! */
ctx->height = (BORDER_BOTTOM - BORDER_TOP) * HIWORD(lParam) / SCREEN_HEIGHT;
EnterCriticalSection(&ctx->sizeLock);
if (ctx->ReportSize != NULL)
ctx->ReportSize(ctx->ReportOpaque, ctx->width, ctx->height);
LeaveCriticalSection(&ctx->sizeLock);
}
break;
case WM_DESTROY:
{
PostQuitMessage(0);
@ -314,6 +358,8 @@ int WINAPI WinMain(HINSTANCE hInstance,
free( file_path );
p_mp = libvlc_media_player_new_from_media( p_media );
InitializeCriticalSection(&Context.sizeLock);
ZeroMemory(&wc, sizeof(WNDCLASSEX));
wc.cbSize = sizeof(WNDCLASSEX);
@ -339,7 +385,7 @@ int WINAPI WinMain(HINSTANCE hInstance,
NULL,
NULL,
hInstance,
p_mp);
&Context);
ShowWindow(hWnd, nCmdShow);
@ -349,7 +395,7 @@ int WINAPI WinMain(HINSTANCE hInstance,
/* Tell VLC to render into our D3D9 environment */
libvlc_video_direct3d_set_callbacks( p_mp, libvlc_video_direct3d_engine_d3d9,
Setup_cb, Cleanup_cb, UpdateOutput_cb, Swap_cb, StartRendering_cb, NULL,
Setup_cb, Cleanup_cb, UpdateOutput_cb, Swap_cb, StartRendering_cb, NULL,
&Context );
libvlc_media_player_play( p_mp );
@ -374,6 +420,7 @@ int WINAPI WinMain(HINSTANCE hInstance,
libvlc_media_release( p_media );
libvlc_release( p_libvlc );
DeleteCriticalSection(&Context.sizeLock);
release_direct3d(&Context);
return msg.wParam;