[PATCH 0/1] MR2105: ddraw: Add local buffer in d3d_device7_DrawPrimitive()

[Steve Schnepp (＠steveschnepp)]

Convert all consecutive calls to d7_DrawPrimitive(TRIANGLE_FAN) into
a single call to d7_DrawPrimitive(TRIANGLE_LIST) with all the vertices.

Note, it *increase* the number of vertices, but bandwith is much less costly
than multiple calls.

Note, only a very precise subset of the calls get buffered in order to
ensure that the disruption is minimal.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=33814

-- 
https://gitlab.winehq.org/wine/wine/-/merge_requests/2105

[PATCH 1/1] ddraw: Add local buffer in d3d_device7_DrawPrimitive()

[Steve Schnepp]

From: Steve Schnepp <steve.schnepp(a)pwkf.org>

Convert all consecutive calls to d7_DrawPrimitive(TRIANGLE_FAN) into
a single call to d7_DrawPrimitive(TRIANGLE_LIST) with all the vertices.

Note, it *increase* the number of vertices, but bandwith is much less costly
than multiple calls.

Note, only a very precise subset of the calls get buffered in order to
ensure that the disruption is minimal.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=33814
---
 dlls/ddraw/ddraw_private.h |  10 ++++
 dlls/ddraw/device.c        | 114 ++++++++++++++++++++++++++++++++++++-
 2 files changed, 122 insertions(+), 2 deletions(-)

diff --git a/dlls/ddraw/ddraw_private.h b/dlls/ddraw/ddraw_private.h
index 09e8133350b..5c77e813311 100644
--- a/dlls/ddraw/ddraw_private.h
+++ b/dlls/ddraw/ddraw_private.h
@@ -317,6 +317,13 @@ DWORD ddraw_allocate_handle(struct ddraw_handle_table *t, void *object, enum ddr
 void *ddraw_free_handle(struct ddraw_handle_table *t, DWORD handle, enum ddraw_handle_type type) DECLSPEC_HIDDEN;
 void *ddraw_get_object(struct ddraw_handle_table *t, DWORD handle, enum ddraw_handle_type type) DECLSPEC_HIDDEN;
 
+#define D3D_BUFFER_SIZE (2 * 1024 * 1024) /* 2 MiB buffer */
+
+struct d3d_device_buffer {
+    DWORD buffer_vertex_count;
+    char buffer_vertices[D3D_BUFFER_SIZE];
+};
+
 struct d3d_device
 {
     /* IUnknown */
@@ -369,6 +376,9 @@ struct d3d_device
 
     struct wined3d_stateblock *recording, *state, *update_state;
     const struct wined3d_stateblock_state *stateblock_state;
+
+    /* Vertices Buffer for squashing DrawPrimitive() calls before sending it to wined3d */
+    struct d3d_device_buffer ddraw_device_buffer;
 };
 
 HRESULT d3d_device_create(struct ddraw *ddraw, const GUID *guid, struct ddraw_surface *target, IUnknown *rt_iface,
diff --git a/dlls/ddraw/device.c b/dlls/ddraw/device.c
index 1cfef5007d5..fc4b2d68047 100644
--- a/dlls/ddraw/device.c
+++ b/dlls/ddraw/device.c
@@ -31,6 +31,11 @@
 
 WINE_DEFAULT_DEBUG_CHANNEL(ddraw);
 WINE_DECLARE_DEBUG_CHANNEL(winediag);
+WINE_DECLARE_DEBUG_CHANNEL(ddraw_perf);
+WINE_DECLARE_DEBUG_CHANNEL(ddraw_buffer);
+
+static HRESULT ddraw_buffer_flush_d7(IDirect3DDevice7 *iface);
+static int ddraw_buffer_add_d7(IDirect3DDevice7 *iface, D3DPRIMITIVETYPE primitive_type, DWORD fvf, void *vertices, DWORD vertex_count, DWORD flags, UINT stride);
 
 /* The device ID */
 const GUID IID_D3DDEVICE_WineD3D = {
@@ -1592,6 +1597,9 @@ static HRESULT d3d_device7_EndScene(IDirect3DDevice7 *iface)
 
     TRACE("iface %p.\n", iface);
 
+    // Flush the vertices buffer
+    ddraw_buffer_flush_d7(iface);
+
     wined3d_mutex_lock();
     hr = wined3d_device_end_scene(device->wined3d_device);
     wined3d_mutex_unlock();
@@ -2548,6 +2556,9 @@ static HRESULT d3d_device7_SetRenderState(IDirect3DDevice7 *iface,
 
     TRACE("iface %p, state %#x, value %#lx.\n", iface, state, value);
 
+    // Flush the vertices buffer
+    ddraw_buffer_flush_d7(iface);
+
     wined3d_mutex_lock();
     /* Some render states need special care */
     switch (state)
@@ -3451,10 +3462,21 @@ static HRESULT d3d_device7_DrawPrimitive(IDirect3DDevice7 *iface,
     stride = get_flexible_vertex_size(fvf);
     size = vertex_count * stride;
 
+    if (primitive_type == D3DPT_TRIANGLELIST) {
+	    // We are currently flushing the buffer
+    } else {
+	    if (ddraw_buffer_add_d7(iface, primitive_type, fvf, vertices, vertex_count, flags, stride)) {
+		return D3D_OK;
+	    }
+	    // Cannot buffer, need to flush the rest, then process this one
+	    ddraw_buffer_flush_d7(iface);
+    }
+
     wined3d_mutex_lock();
 
-    if (FAILED(hr = wined3d_streaming_buffer_upload(device->wined3d_device,
-            &device->vertex_buffer, vertices, size, stride, &vb_pos)))
+    hr = wined3d_streaming_buffer_upload(device->wined3d_device,
+            &device->vertex_buffer, vertices, size, stride, &vb_pos);
+    if (FAILED(hr))
         goto done;
 
     hr = wined3d_stateblock_set_stream_source(device->state, 0, device->vertex_buffer.buffer, 0, stride);
@@ -4615,8 +4637,11 @@ static HRESULT WINAPI d3d_device3_GetTexture(IDirect3DDevice3 *iface, DWORD stag
     TRACE("Returning texture %p.\n", *Texture2);
 
     return ret;
+
 }
 
+
+
 /*****************************************************************************
  * IDirect3DDevice7::SetTexture
  *
@@ -4641,6 +4666,9 @@ static HRESULT d3d_device7_SetTexture(IDirect3DDevice7 *iface,
 
     TRACE("iface %p, stage %lu, texture %p.\n", iface, stage, texture);
 
+    // Flush the vertices buffer
+    ddraw_buffer_flush_d7(iface);
+
     if (surf && (surf->surface_desc.ddsCaps.dwCaps & DDSCAPS_TEXTURE))
     {
         if (surf->draw_texture)
@@ -4925,6 +4953,9 @@ static HRESULT d3d_device7_SetTextureStageState(IDirect3DDevice7 *iface,
     TRACE("iface %p, stage %lu, state %#x, value %#lx.\n",
             iface, stage, state, value);
 
+    // Flush the vertices buffer
+    ddraw_buffer_flush_d7(iface);
+
     if (state > D3DTSS_TEXTURETRANSFORMFLAGS)
     {
         WARN("Invalid state %#x passed.\n", state);
@@ -6963,3 +6994,82 @@ HRESULT d3d_device_create(struct ddraw *ddraw, const GUID *guid, struct ddraw_su
 
     return D3D_OK;
 }
+
+/*
+ * DirectD3D vertex buffer helpers
+ *
+ * For now, it only supports :
+ *    d3d_device.version == 7
+ *    primitive_type == D3DPT_TRIANGLEFAN
+ *    fvf == 0x2c4
+ *    flags == 0
+ *    vertex_count >= 3
+ *
+ * Note : it does transform D3DPT_TRIANGLEFAN into D3DPT_TRIANGLELIST.
+ */
+static int ddraw_buffer_add_d7(IDirect3DDevice7 *iface, D3DPRIMITIVETYPE primitive_type, DWORD fvf, void *vertices, DWORD vertex_count, DWORD flags, UINT stride) {
+    struct d3d_device *device = impl_from_IDirect3DDevice7(iface);
+
+	if (!TRACE_ON(ddraw_buffer)) return 0;
+	if (primitive_type != D3DPT_TRIANGLEFAN) return 0;
+	if (fvf != 0x2c4) return 0;
+	if (flags) return 0;
+
+    if (vertex_count < 3) {
+		WARN("vertex_count %d lower than 3. not buffering");
+		return 0;
+	}
+
+    /* First triangle is simply copied over */
+    memcpy(device->ddraw_device_buffer.buffer_vertices + device->ddraw_device_buffer.buffer_vertex_count * stride, vertices, stride * 3);
+    device->ddraw_device_buffer.buffer_vertex_count += 3;
+    TRACE_(ddraw_perf)("only %d vertex count. buffering. buffer_vertex_count %d stride %d\n", vertex_count, device->ddraw_device_buffer.buffer_vertex_count, stride);
+
+    /* Next triangles are recreated with : 2 next vertices then the 1rst one.
+     * So, it will *increase* the number of total vertices from 4 to 6, 5 to 9, 6 to 12, ... */
+    for (int idx = 2; idx < vertex_count-1; idx ++) {
+        /* Copy the 2 last ones */
+        char* next_vertice = vertices;
+        next_vertice += idx * stride;
+        memcpy(device->ddraw_device_buffer.buffer_vertices + device->ddraw_device_buffer.buffer_vertex_count * stride, next_vertice, stride * 2);
+        device->ddraw_device_buffer.buffer_vertex_count += 2;
+
+        /* Copy the first again */
+        memcpy(device->ddraw_device_buffer.buffer_vertices + device->ddraw_device_buffer.buffer_vertex_count * stride, vertices, stride);
+        device->ddraw_device_buffer.buffer_vertex_count += 1;
+        TRACE_(ddraw_perf)("idx %d buffer_vertex_count %d stride %d\n", idx, device->ddraw_device_buffer.buffer_vertex_count, stride);
+    }
+
+    /* Buffered ! */
+    return 1;
+}
+
+/* Flushing the buffer if it isn't empty.
+ *
+ * It will delegate to a single call to DrawPrimitive with the correct parameters,
+ * and a (hopefully) huge list of triangles vertices. */
+
+static HRESULT ddraw_buffer_flush_d7(IDirect3DDevice7 *iface) {
+    struct d3d_device *device = impl_from_IDirect3DDevice7(iface);
+
+    TRACE_(ddraw_perf)("buffer_vertex_count %d\n", device->ddraw_device_buffer.buffer_vertex_count);
+
+    /* Nothing to do if it is empty */
+    if (! device->ddraw_device_buffer.buffer_vertex_count) return D3D_OK;
+
+    /* Delegate the call */
+    {
+        HRESULT ret;
+        const DWORD from_flush_flags = 0xF0F0F0F0; // Using a specific flag to recognise & avoid recursion loops
+
+        ret = d3d_device7_DrawPrimitive(iface, D3DPT_TRIANGLELIST, 0x2c4, device->ddraw_device_buffer.buffer_vertices, device->ddraw_device_buffer.buffer_vertex_count, from_flush_flags);
+
+        if (ret != D3D_OK) FIXME("error in call delegation %d", ret);
+    }
+
+    /* Flush the buffer */
+    device->ddraw_device_buffer.buffer_vertex_count = 0;
+
+    /* The error isn't really useful as it is too late, so always returning */
+    return D3D_OK;
+}
-- 
GitLab

https://gitlab.winehq.org/wine/wine/-/merge_requests/2105