drawprim.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/*
 * WINED3D draw functions
 *
 * Copyright 2002-2004 Jason Edmeades
 * Copyright 2002-2004 Raphael Junqueira
 * Copyright 2004 Christian Costa
 * Copyright 2005 Oliver Stieber
 * Copyright 2006 Henri Verbeet
 * Copyright 2007 Stefan D鰏inger for CodeWeavers
 *
 * 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_draw);
#define GLINFO_LOCATION This->adapter->gl_info

#include <stdio.h>

#if 0 /* TODO */
extern IWineD3DVertexShaderImpl*            VertexShaders[64];
extern IWineD3DVertexDeclarationImpl*       VertexShaderDeclarations[64];
extern IWineD3DPixelShaderImpl*             PixelShaders[64];

#undef GL_VERSION_1_4 /* To be fixed, caused by mesa headers */
#endif

/* Issues the glBegin call for gl given the primitive type and count */
static DWORD primitiveToGl(WINED3DPRIMITIVETYPE PrimitiveType,
                    DWORD            NumPrimitives,
                    GLenum          *primType)
{
    DWORD   NumVertexes = NumPrimitives;

    switch (PrimitiveType) {
    case WINED3DPT_POINTLIST:
        TRACE("POINTS\n");
        *primType   = GL_POINTS;
        NumVertexes = NumPrimitives;
        break;

    case WINED3DPT_LINELIST:
        TRACE("LINES\n");
        *primType   = GL_LINES;
        NumVertexes = NumPrimitives * 2;
        break;

    case WINED3DPT_LINESTRIP:
        TRACE("LINE_STRIP\n");
        *primType   = GL_LINE_STRIP;
        NumVertexes = NumPrimitives + 1;
        break;

    case WINED3DPT_TRIANGLELIST:
        TRACE("TRIANGLES\n");
        *primType   = GL_TRIANGLES;
        NumVertexes = NumPrimitives * 3;
        break;

    case WINED3DPT_TRIANGLESTRIP:
        TRACE("TRIANGLE_STRIP\n");
        *primType   = GL_TRIANGLE_STRIP;
        NumVertexes = NumPrimitives + 2;
        break;

    case WINED3DPT_TRIANGLEFAN:
        TRACE("TRIANGLE_FAN\n");
        *primType   = GL_TRIANGLE_FAN;
        NumVertexes = NumPrimitives + 2;
        break;

    default:
        FIXME("Unhandled primitive\n");
        *primType    = GL_POINTS;
        break;
    }
    return NumVertexes;
}

static BOOL fixed_get_input(
    BYTE usage, BYTE usage_idx,
    unsigned int* regnum) {

    *regnum = -1;

    /* Those positions must have the order in the
     * named part of the strided data */

    if ((usage == WINED3DDECLUSAGE_POSITION || usage == WINED3DDECLUSAGE_POSITIONT) && usage_idx == 0)
        *regnum = 0;
    else if (usage == WINED3DDECLUSAGE_BLENDWEIGHT && usage_idx == 0)
        *regnum = 1;
    else if (usage == WINED3DDECLUSAGE_BLENDINDICES && usage_idx == 0)
        *regnum = 2;
    else if (usage == WINED3DDECLUSAGE_NORMAL && usage_idx == 0)
        *regnum = 3;
    else if (usage == WINED3DDECLUSAGE_PSIZE && usage_idx == 0)
        *regnum = 4;
    else if (usage == WINED3DDECLUSAGE_COLOR && usage_idx == 0)
        *regnum = 5;
    else if (usage == WINED3DDECLUSAGE_COLOR && usage_idx == 1)
        *regnum = 6;
    else if (usage == WINED3DDECLUSAGE_TEXCOORD && usage_idx < WINED3DDP_MAXTEXCOORD)
        *regnum = 7 + usage_idx;
    else if ((usage == WINED3DDECLUSAGE_POSITION || usage == WINED3DDECLUSAGE_POSITIONT) && usage_idx == 1)
        *regnum = 7 + WINED3DDP_MAXTEXCOORD;
    else if (usage == WINED3DDECLUSAGE_NORMAL && usage_idx == 1)
        *regnum = 8 + WINED3DDP_MAXTEXCOORD;
    else if (usage == WINED3DDECLUSAGE_TANGENT && usage_idx == 0)
        *regnum = 9 + WINED3DDP_MAXTEXCOORD;
    else if (usage == WINED3DDECLUSAGE_BINORMAL && usage_idx == 0)
        *regnum = 10 + WINED3DDP_MAXTEXCOORD;
    else if (usage == WINED3DDECLUSAGE_TESSFACTOR && usage_idx == 0)
        *regnum = 11 + WINED3DDP_MAXTEXCOORD;
    else if (usage == WINED3DDECLUSAGE_FOG && usage_idx == 0)
        *regnum = 12 + WINED3DDP_MAXTEXCOORD;
    else if (usage == WINED3DDECLUSAGE_DEPTH && usage_idx == 0)
        *regnum = 13 + WINED3DDP_MAXTEXCOORD;
    else if (usage == WINED3DDECLUSAGE_SAMPLE && usage_idx == 0)
        *regnum = 14 + WINED3DDP_MAXTEXCOORD;

    if (*regnum < 0) {
        FIXME("Unsupported input stream [usage=%s, usage_idx=%u]\n",
            debug_d3ddeclusage(usage), usage_idx);
        return FALSE;
    }
    return TRUE;
}

void primitiveDeclarationConvertToStridedData(
     IWineD3DDevice *iface,
     BOOL useVertexShaderFunction,
     WineDirect3DVertexStridedData *strided,
     BOOL *fixup) {

     /* We need to deal with frequency data!*/

    BYTE  *data    = NULL;
    IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
    IWineD3DVertexDeclarationImpl* vertexDeclaration = (IWineD3DVertexDeclarationImpl *)This->stateBlock->vertexDecl;
    int i;
    WINED3DVERTEXELEMENT *element;
    DWORD stride;
    int reg;
    DWORD numPreloadStreams = This->stateBlock->streamIsUP ? 0 : vertexDeclaration->num_streams;
    DWORD *streams = vertexDeclaration->streams;

    /* Check for transformed vertices, disable vertex shader if present */
    strided->u.s.position_transformed = vertexDeclaration->position_transformed;
    if(vertexDeclaration->position_transformed) {
        useVertexShaderFunction = FALSE;
    }

    /* Translate the declaration into strided data */
    for (i = 0 ; i < vertexDeclaration->declarationWNumElements - 1; ++i) {
        GLint streamVBO = 0;
        BOOL stride_used;
        unsigned int idx;

        element = vertexDeclaration->pDeclarationWine + i;
        TRACE("%p Element %p (%d of %d)\n", vertexDeclaration->pDeclarationWine,
            element,  i + 1, vertexDeclaration->declarationWNumElements - 1);

        if (This->stateBlock->streamSource[element->Stream] == NULL)
            continue;

        if (This->stateBlock->streamIsUP) {
            TRACE("Stream is up %d, %p\n", element->Stream, This->stateBlock->streamSource[element->Stream]);
            streamVBO = 0;
            data    = (BYTE *)This->stateBlock->streamSource[element->Stream];
        } else {
            TRACE("Stream isn't up %d, %p\n", element->Stream, This->stateBlock->streamSource[element->Stream]);
            data    = IWineD3DVertexBufferImpl_GetMemory(This->stateBlock->streamSource[element->Stream], 0, &streamVBO);
            if(fixup) {
                if( streamVBO != 0) *fixup = TRUE;
                else if(*fixup && !useVertexShaderFunction &&
                       (element->Usage == WINED3DDECLUSAGE_COLOR ||
                        element->Usage == WINED3DDECLUSAGE_POSITIONT)) {
                    /* This may be bad with the fixed function pipeline */
                    FIXME("Missing vbo streams with unfixed colors or transformed position, expect problems\n");
                }
            }
        }
        stride  = This->stateBlock->streamStride[element->Stream];
        data += element->Offset;
        reg = element->Reg;

        TRACE("Offset %d Stream %d UsageIndex %d\n", element->Offset, element->Stream, element->UsageIndex);

        if (useVertexShaderFunction)
            stride_used = vshader_get_input(This->stateBlock->vertexShader,
                element->Usage, element->UsageIndex, &idx);
        else
            stride_used = fixed_get_input(element->Usage, element->UsageIndex, &idx);

        if (stride_used) {
            TRACE("Loaded %s array %u [usage=%s, usage_idx=%u, "
                    "stream=%u, offset=%u, stride=%u, type=%s, VBO=%u]\n",
                    useVertexShaderFunction? "shader": "fixed function", idx,
                    debug_d3ddeclusage(element->Usage), element->UsageIndex,
                    element->Stream, element->Offset, stride, debug_d3ddecltype(element->Type), streamVBO);

            strided->u.input[idx].lpData = data;
            strided->u.input[idx].dwType = element->Type;
            strided->u.input[idx].dwStride = stride;
            strided->u.input[idx].VBO = streamVBO;
            strided->u.input[idx].streamNo = element->Stream;
        }
    }
    /* Now call PreLoad on all the vertex buffers. In the very rare case
     * that the buffers stopps converting PreLoad will dirtify the VDECL again.
     * The vertex buffer can now use the strided structure in the device instead of finding its
     * own again.
     *
     * NULL streams won't be recorded in the array, UP streams won't be either. A stream is only
     * once in there.
     */
    for(i=0; i < numPreloadStreams; i++) {
        IWineD3DVertexBuffer_PreLoad(This->stateBlock->streamSource[streams[i]]);
    }
}

static void drawStridedFast(IWineD3DDevice *iface,UINT numberOfVertices, GLenum glPrimitiveType,
                     const void *idxData, short idxSize, ULONG minIndex, ULONG startIdx, ULONG startVertex) {
    IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;

    if (idxSize != 0 /* This crashes sometimes!*/) {
        TRACE("(%p) : glElements(%x, %d, %d, ...)\n", This, glPrimitiveType, numberOfVertices, minIndex);
        idxData = idxData == (void *)-1 ? NULL : idxData;
#if 1
        glDrawElements(glPrimitiveType, numberOfVertices, idxSize == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT,
                     (const char *)idxData+(idxSize * startIdx));
        checkGLcall("glDrawElements");
#else /* using drawRangeElements may be faster */

        glDrawRangeElements(glPrimitiveType, minIndex, minIndex + numberOfVertices - 1, numberOfVertices,
                      idxSize == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT,
                      (const char *)idxData+(idxSize * startIdx));
        checkGLcall("glDrawRangeElements");
#endif

    } else {

        /* Note first is now zero as we shuffled along earlier */
        TRACE("(%p) : glDrawArrays(%x, 0, %d)\n", This, glPrimitiveType, numberOfVertices);
        glDrawArrays(glPrimitiveType, startVertex, numberOfVertices);
        checkGLcall("glDrawArrays");

    }

    return;
}

/*
 * Actually draw using the supplied information.
 * Slower GL version which extracts info about each vertex in turn
 */

static void drawStridedSlow(IWineD3DDevice *iface, WineDirect3DVertexStridedData *sd,
                     UINT NumVertexes, GLenum glPrimType,
                     const void *idxData, short idxSize, ULONG minIndex, ULONG startIdx, ULONG startVertex) {

    unsigned int               textureNo    = 0;
    const WORD                *pIdxBufS     = NULL;
    const DWORD               *pIdxBufL     = NULL;
    LONG                       vx_index;
    float x  = 0.0f, y  = 0.0f, z = 0.0f;  /* x,y,z coordinates          */
    float rhw = 0.0f;                      /* rhw                        */
    DWORD diffuseColor = 0xFFFFFFFF;       /* Diffuse Color              */
    DWORD specularColor = 0;               /* Specular Color             */
    IWineD3DDeviceImpl *This = (IWineD3DDeviceImpl *)iface;
    UINT *streamOffset = This->stateBlock->streamOffset;
    DWORD                      SkipnStrides = startVertex + This->stateBlock->loadBaseVertexIndex;

    BYTE *texCoords[WINED3DDP_MAXTEXCOORD];
    BYTE *diffuse = NULL, *specular = NULL, *normal = NULL, *position = NULL;

    TRACE("Using slow vertex array code\n");

    /* Variable Initialization */
    if (idxSize != 0) {
        /* Immediate mode drawing can't make use of indices in a vbo - get the data from the index buffer.
         * If the index buffer has no vbo(not supported or other reason), or with user pointer drawing