vertexbuffer.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/*
 * IWineD3DVertexBuffer Implementation
 *
 * Copyright 2002-2005 Jason Edmeades
 *                     Raphael Junqueira
 * Copyright 2004 Christian Costa
 *
 * This library 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.
 *
 * This library 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 this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wined3d_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(d3d);
#define GLINFO_LOCATION This->resource.wineD3DDevice->adapter->gl_info

#define VB_MAXDECLCHANGES     100     /* After that number we stop converting */
#define VB_RESETDECLCHANGE    1000    /* Reset the changecount after that number of draws */

/* *******************************************
   IWineD3DVertexBuffer IUnknown parts follow
   ******************************************* */
static HRESULT WINAPI IWineD3DVertexBufferImpl_QueryInterface(IWineD3DVertexBuffer *iface, REFIID riid, LPVOID *ppobj)
{
    IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
    TRACE("(%p)->(%s,%p)\n",This,debugstr_guid(riid),ppobj);
    if (IsEqualGUID(riid, &IID_IUnknown)
        || IsEqualGUID(riid, &IID_IWineD3DBase)
        || IsEqualGUID(riid, &IID_IWineD3DResource)
        || IsEqualGUID(riid, &IID_IWineD3DVertexBuffer)){
        IUnknown_AddRef(iface);
        *ppobj = This;
        return S_OK;
    }
    *ppobj = NULL;
    return E_NOINTERFACE;
}

static ULONG WINAPI IWineD3DVertexBufferImpl_AddRef(IWineD3DVertexBuffer *iface) {
    IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
    ULONG ref = InterlockedIncrement(&This->resource.ref);
    TRACE("(%p) : AddRef increasing from %d\n", This, ref - 1);
    return ref;
}

static ULONG WINAPI IWineD3DVertexBufferImpl_Release(IWineD3DVertexBuffer *iface) {
    IWineD3DVertexBufferImpl *This = (IWineD3DVertexBufferImpl *)iface;
    ULONG ref = InterlockedDecrement(&This->resource.ref);
    TRACE("(%p) : Releasing from %d\n", This, ref + 1);
    if (ref == 0) {

        if(This->vbo) {
            IWineD3DDeviceImpl *device = This->resource.wineD3DDevice;

            ActivateContext(device, device->lastActiveRenderTarget, CTXUSAGE_RESOURCELOAD);
            ENTER_GL();
            GL_EXTCALL(glDeleteBuffersARB(1, &This->vbo));
            checkGLcall("glDeleteBuffersARB");
            LEAVE_GL();
        }

        IWineD3DResourceImpl_CleanUp((IWineD3DResource *)iface);
        HeapFree(GetProcessHeap(), 0, This);
    }
    return ref;
}

/* ****************************************************
   IWineD3DVertexBuffer IWineD3DResource parts follow
   **************************************************** */
static HRESULT WINAPI IWineD3DVertexBufferImpl_GetDevice(IWineD3DVertexBuffer *iface, IWineD3DDevice** ppDevice) {
    return IWineD3DResourceImpl_GetDevice((IWineD3DResource *)iface, ppDevice);
}

static HRESULT WINAPI IWineD3DVertexBufferImpl_SetPrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid, CONST void* pData, DWORD SizeOfData, DWORD Flags) {
    return IWineD3DResourceImpl_SetPrivateData((IWineD3DResource *)iface, refguid, pData, SizeOfData, Flags);
}

static HRESULT WINAPI IWineD3DVertexBufferImpl_GetPrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid, void* pData, DWORD* pSizeOfData) {
    return IWineD3DResourceImpl_GetPrivateData((IWineD3DResource *)iface, refguid, pData, pSizeOfData);
}

static HRESULT WINAPI IWineD3DVertexBufferImpl_FreePrivateData(IWineD3DVertexBuffer *iface, REFGUID refguid) {
    return IWineD3DResourceImpl_FreePrivateData((IWineD3DResource *)iface, refguid);
}

static DWORD    WINAPI IWineD3DVertexBufferImpl_SetPriority(IWineD3DVertexBuffer *iface, DWORD PriorityNew) {
    return IWineD3DResourceImpl_SetPriority((IWineD3DResource *)iface, PriorityNew);
}

static DWORD    WINAPI IWineD3DVertexBufferImpl_GetPriority(IWineD3DVertexBuffer *iface) {
    return IWineD3DResourceImpl_GetPriority((IWineD3DResource *)iface);
}

static void fixup_vertices(
	BYTE *src, BYTE *dst,
	int stride,
	int num,
	int pos, BOOL haspos,
	int diffuse, BOOL hasdiffuse,
	int specular, BOOL hasspecular
) {
    int i;
    float x, y, z, w;

    for(i = num - 1; i >= 0; i--) {
        if(haspos) {
            float *p = (float *) ((src + pos) + i * stride);

            /* rhw conversion like in drawStridedSlow */
            if(p[3] == 1.0 || ((p[3] < eps) && (p[3] > -eps))) {
                x = p[0];
                y = p[1];
                z = p[2];
                w = 1.0;
            } else {
                w = 1.0 / p[3];
                x = p[0] * w;
                y = p[1] * w;
                z = p[2] * w;
            }
            p = (float *) (dst + i * stride + pos);
            p[0] = x;
            p[1] = y;
            p[2] = z;
            p[3] = w;
        }
        if(hasdiffuse) {
            DWORD srcColor, *dstColor = (DWORD *) (dst + i * stride + diffuse);
            srcColor = * (DWORD *) ( (src + diffuse) + i * stride);

            /* Color conversion like in drawStridedSlow. watch out for little endianity
            * If we want that stuff to work on big endian machines too we have to consider more things
            *
            * 0xff000000: Alpha mask
            * 0x00ff0000: Blue mask
            * 0x0000ff00: Green mask
            * 0x000000ff: Red mask
            */

            *dstColor = 0;
            *dstColor |= (srcColor & 0xff00ff00)      ;   /* Alpha Green */
            *dstColor |= (srcColor & 0x00ff0000) >> 16;   /* Red */
            *dstColor |= (srcColor & 0x000000ff) << 16;   /* Blue */
        }
        if(hasspecular) {
            DWORD srcColor, *dstColor = (DWORD *) (dst + i * stride + specular);
            srcColor = * (DWORD *) ( (src + specular) + i * stride);

            /* Similar to diffuse
             * TODO: Write the alpha value out for fog coords
             */
            *dstColor = 0;
            *dstColor |= (srcColor & 0xff00ff00)      ;   /* Alpha Green */
            *dstColor |= (srcColor & 0x00ff0000) >> 16;   /* Red */
            *dstColor |= (srcColor & 0x000000ff) << 16;   /* Blue */
        }
    }
}

inline BOOL WINAPI IWineD3DVertexBufferImpl_FindDecl(IWineD3DVertexBufferImpl *This)
{
    WineDirect3DVertexStridedData strided;
    IWineD3DDeviceImpl *device = This->resource.wineD3DDevice;

    /* In d3d7 the vertex buffer declaration NEVER changes because it is stored in the d3d7 vertex buffer.
     * Once we have our declaration there is no need to look it up again.
     */
    if(((IWineD3DImpl *)device->wineD3D)->dxVersion == 7 && This->Flags & VBFLAG_HASDESC) {
        return FALSE;
    }

    /* There are certain vertex data types that need to be fixed up. The Vertex Buffers FVF doesn't
     * help finding them, only the vertex declaration or the device FVF can determine that at drawPrim
     * time. Rules are as follows:
     *
     * -> No modification when Vertex Shaders are used
     * -> Fix up position1 and position 2 if they are XYZRHW
     * -> Fix up diffuse color
     * -> Fix up specular color
     *
     * The Declaration is only known at drawing time, and it can change from draw to draw. If any converted values
     * are changed, the whole buffer has to be reconverted and reloaded. (Converting is SLOW, so if this happens too
     * often PreLoad stops converting entirely and falls back to drawStridedSlow).
     *
     * Reconvert if:
     * -> New semantics that have to be converted appear
     * -> The position of semantics that have to be converted changes
     * -> The stride of the vertex changed AND there is stuff that needs conversion
     * -> (If a vertex shader is bound and in use assume that nothing that needs conversion is there)
     *
     * Return values:
     *  TRUE: Reload is needed
     *  FALSE: otherwise
     */

    if (use_vs(device)) {
        /* Assume no conversion */
        memset(&strided, 0, sizeof(strided));
    } else {
        /* we need a copy because we modify some params */
        memcpy(&strided, &device->strided_streams, sizeof(strided));

        /* Filter out data that does not come from this VBO */
        if(strided.u.s.position.VBO != This->vbo)    memset(&strided.u.s.position, 0, sizeof(strided.u.s.position));
        if(strided.u.s.diffuse.VBO != This->vbo)     memset(&strided.u.s.diffuse, 0, sizeof(strided.u.s.diffuse));
        if(strided.u.s.specular.VBO != This->vbo)    memset(&strided.u.s.specular, 0, sizeof(strided.u.s.specular));
        if(strided.u.s.position2.VBO != This->vbo)   memset(&strided.u.s.position2, 0, sizeof(strided.u.s.position2));
    }

    /* We have a declaration now in the buffer */
    This->Flags |= VBFLAG_HASDESC;

    /* Find out if reload is needed
     * Position of the semantic in the vertex and the stride must be equal to the stored type. Don't mind if only unconverted stuff changed.
     *
     * If some stuff does not exist in the buffer, then lpData, dwStride and dwType are memsetted to 0. So if the semantic didn't exist before
     * and does not exist now all 3 values will be equal(=0).
     *
     * Checking the lpData field alone is not enough, because data may appear at offset 0 in the buffer. This is the same location as nonexistent
     * data uses, so we have to check the type and stride too. Colors can be at offset 0 too, because it is perfectly fine to render from 2 or more
     * buffers at the same time and get the position from one and the color from the other buffer.
     */
    if( /* Position transformed vs untransformed */
        ((This->strided.u.s.position_transformed || strided.u.s.position_transformed) &&
          (This->strided.u.s.position.lpData != strided.u.s.position.lpData ||
           This->strided.u.s.position.dwType != strided.u.s.position.dwType)) ||
        /* Diffuse position and data type */
        This->strided.u.s.diffuse.lpData != strided.u.s.diffuse.lpData || This->strided.u.s.diffuse.dwStride != strided.u.s.diffuse.dwStride ||
         This->strided.u.s.diffuse.dwType != strided.u.s.diffuse.dwType ||
        /* Specular position and data type */
        This->strided.u.s.specular.lpData != strided.u.s.specular.lpData || This->strided.u.s.specular.dwStride != strided.u.s.specular.dwStride ||
         This->strided.u.s.specular.dwType != strided.u.s.specular.dwType) {

        TRACE("Declaration changed, reloading buffer\n");
        /* Set the new description */
        memcpy(&This->strided, &strided, sizeof(strided));
        return TRUE;
    }

    return FALSE;