state.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

/*
 * Direct3D state management
 *
 * Copyright 2002 Lionel Ulmer
 * Copyright 2002-2005 Jason Edmeades
 * Copyright 2003-2004 Raphael Junqueira
 * Copyright 2004 Christian Costa
 * Copyright 2005 Oliver Stieber
 * Copyright 2006 Henri Verbeet
 * Copyright 2006-2007 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 <stdio.h>
#ifdef HAVE_FLOAT_H
# include <float.h>
#endif
#include "wined3d_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(d3d);
WINE_DECLARE_DEBUG_CHANNEL(d3d_shader);

#define GLINFO_LOCATION stateblock->wineD3DDevice->adapter->gl_info

static void state_nogl(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    /* Used for states which are not mapped to a gl state as-is, but used somehow different,
     * e.g as a parameter for drawing, or which are unimplemented in windows d3d
     */
    if(STATE_IS_RENDER(state)) {
        WINED3DRENDERSTATETYPE RenderState = state - STATE_RENDER(0);
        TRACE("(%s,%d) no direct mapping to gl\n", debug_d3drenderstate(RenderState), stateblock->renderState[RenderState]);
    } else {
        /* Shouldn't have an unknown type here */
        FIXME("%d no direct mapping to gl of state with unknown type\n", state);
    }
}

static void state_undefined(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    /* Print a WARN, this allows the stateblock code to loop over all states to generate a display
     * list without causing confusing terminal output. Deliberately no special debug name here
     * because its undefined.
     */
    WARN("undefined state %d\n", state);
}

static void state_fillmode(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    WINED3DFILLMODE Value = stateblock->renderState[WINED3DRS_FILLMODE];

    switch(Value) {
        case WINED3DFILL_POINT:
            glPolygonMode(GL_FRONT_AND_BACK, GL_POINT);
            checkGLcall("glPolygonMode(GL_FRONT_AND_BACK, GL_POINT)");
            break;
        case WINED3DFILL_WIREFRAME:
            glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
            checkGLcall("glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)");
            break;
        case WINED3DFILL_SOLID:
            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
            checkGLcall("glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)");
            break;
        default:
            FIXME("Unrecognized WINED3DRS_FILLMODE value %d\n", Value);
    }
}

static void state_lighting(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    BOOL transformed;

    /* Lighting is not enabled if transformed vertices are drawn
     * but lighting does not affect the stream sources, so it is not grouped for performance reasons.
     * This state reads the decoded vertex decl, so if it is dirty don't do anything. The
     * vertex declaration appplying function calls this function for updating
     */

    if(isStateDirty(context, STATE_VDECL)) {
        return;
    }

    transformed = ((stateblock->wineD3DDevice->strided_streams.u.s.position.lpData != NULL ||
                    stateblock->wineD3DDevice->strided_streams.u.s.position.VBO != 0) &&
                    stateblock->wineD3DDevice->strided_streams.u.s.position_transformed) ? TRUE : FALSE;

    if (stateblock->renderState[WINED3DRS_LIGHTING] && !transformed) {
        glEnable(GL_LIGHTING);
        checkGLcall("glEnable GL_LIGHTING");
    } else {
        glDisable(GL_LIGHTING);
        checkGLcall("glDisable GL_LIGHTING");
    }
}

static void state_zenable(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    /* No z test without depth stencil buffers */
    if(stateblock->wineD3DDevice->stencilBufferTarget == NULL) {
        glDisable(GL_DEPTH_TEST); /* This also disables z writing in gl */
        checkGLcall("glDisable GL_DEPTH_TEST");
        return;
    }

    switch ((WINED3DZBUFFERTYPE) stateblock->renderState[WINED3DRS_ZENABLE]) {
        case WINED3DZB_FALSE:
            glDisable(GL_DEPTH_TEST);
            checkGLcall("glDisable GL_DEPTH_TEST");
            break;
        case WINED3DZB_TRUE:
            glEnable(GL_DEPTH_TEST);
            checkGLcall("glEnable GL_DEPTH_TEST");
            break;
        case WINED3DZB_USEW:
            glEnable(GL_DEPTH_TEST);
            checkGLcall("glEnable GL_DEPTH_TEST");
            FIXME("W buffer is not well handled\n");
            break;
        default:
            FIXME("Unrecognized D3DZBUFFERTYPE value %d\n", stateblock->renderState[WINED3DRS_ZENABLE]);
    }
}

static void state_cullmode(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    /* TODO: Put this into the offscreen / onscreen rendering block due to device->render_offscreen */

    /* If we are culling "back faces with clockwise vertices" then
       set front faces to be counter clockwise and enable culling
       of back faces                                               */
    switch ((WINED3DCULL) stateblock->renderState[WINED3DRS_CULLMODE]) {
        case WINED3DCULL_NONE:
            glDisable(GL_CULL_FACE);
            checkGLcall("glDisable GL_CULL_FACE");
            break;
        case WINED3DCULL_CW:
            glEnable(GL_CULL_FACE);
            checkGLcall("glEnable GL_CULL_FACE");
            if (stateblock->wineD3DDevice->render_offscreen) {
                glFrontFace(GL_CW);
                checkGLcall("glFrontFace GL_CW");
            } else {
                glFrontFace(GL_CCW);
                checkGLcall("glFrontFace GL_CCW");
            }
            glCullFace(GL_BACK);
            break;
        case WINED3DCULL_CCW:
            glEnable(GL_CULL_FACE);
            checkGLcall("glEnable GL_CULL_FACE");
            if (stateblock->wineD3DDevice->render_offscreen) {
                glFrontFace(GL_CCW);
                checkGLcall("glFrontFace GL_CCW");
            } else {
                glFrontFace(GL_CW);
                checkGLcall("glFrontFace GL_CW");
            }
            glCullFace(GL_BACK);
            break;
        default:
            FIXME("Unrecognized/Unhandled WINED3DCULL value %d\n", stateblock->renderState[WINED3DRS_CULLMODE]);
    }
}

static void state_shademode(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    switch ((WINED3DSHADEMODE) stateblock->renderState[WINED3DRS_SHADEMODE]) {
        case WINED3DSHADE_FLAT:
            glShadeModel(GL_FLAT);
            checkGLcall("glShadeModel(GL_FLAT)");
            break;
        case WINED3DSHADE_GOURAUD:
            glShadeModel(GL_SMOOTH);
            checkGLcall("glShadeModel(GL_SMOOTH)");
            break;
        case WINED3DSHADE_PHONG:
            FIXME("WINED3DSHADE_PHONG isn't supported\n");
            break;
        default:
            FIXME("Unrecognized/Unhandled WINED3DSHADEMODE value %d\n", stateblock->renderState[WINED3DRS_SHADEMODE]);
    }
}

static void state_ditherenable(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    if (stateblock->renderState[WINED3DRS_DITHERENABLE]) {
        glEnable(GL_DITHER);
        checkGLcall("glEnable GL_DITHER");
    } else {
        glDisable(GL_DITHER);
        checkGLcall("glDisable GL_DITHER");
    }
}

static void state_zwritenable(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    /* TODO: Test if in d3d z writing is enabled even if ZENABLE is off. If yes,
     * this has to be merged with ZENABLE and ZFUNC
     */
    if (stateblock->renderState[WINED3DRS_ZWRITEENABLE]) {
        glDepthMask(1);
        checkGLcall("glDepthMask(1)");
    } else {
        glDepthMask(0);
        checkGLcall("glDepthMask(0)");
    }
}

static void state_zfunc(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    int glParm = CompareFunc(stateblock->renderState[WINED3DRS_ZFUNC]);

    if(glParm) {
        glDepthFunc(glParm);
        checkGLcall("glDepthFunc");
    }
}

static void state_ambient(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    float col[4];
    D3DCOLORTOGLFLOAT4(stateblock->renderState[WINED3DRS_AMBIENT], col);

    TRACE("Setting ambient to (%f,%f,%f,%f)\n", col[0], col[1], col[2], col[3]);
    glLightModelfv(GL_LIGHT_MODEL_AMBIENT, col);
    checkGLcall("glLightModel for MODEL_AMBIENT");
}

static void state_blend(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    int srcBlend = GL_ZERO;
    int dstBlend = GL_ZERO;

    /* GL_LINE_SMOOTH needs GL_BLEND to work, according to the red book, and special blending params */
    if (stateblock->renderState[WINED3DRS_ALPHABLENDENABLE]      ||
        stateblock->renderState[WINED3DRS_EDGEANTIALIAS]         ||
        stateblock->renderState[WINED3DRS_ANTIALIASEDLINEENABLE]) {
        glEnable(GL_BLEND);
        checkGLcall("glEnable GL_BLEND");
    } else {
        glDisable(GL_BLEND);
        checkGLcall("glDisable GL_BLEND");
        /* Nothing more to do - get out */
        return;
    };

    switch (stateblock->renderState[WINED3DRS_SRCBLEND]) {
        case WINED3DBLEND_ZERO               : srcBlend = GL_ZERO;  break;
        case WINED3DBLEND_ONE                : srcBlend = GL_ONE;  break;
        case WINED3DBLEND_SRCCOLOR           : srcBlend = GL_SRC_COLOR;  break;
        case WINED3DBLEND_INVSRCCOLOR        : srcBlend = GL_ONE_MINUS_SRC_COLOR;  break;
        case WINED3DBLEND_SRCALPHA           : srcBlend = GL_SRC_ALPHA;  break;
        case WINED3DBLEND_INVSRCALPHA        : srcBlend = GL_ONE_MINUS_SRC_ALPHA;  break;
        case WINED3DBLEND_DESTALPHA          : srcBlend = GL_DST_ALPHA;  break;
        case WINED3DBLEND_INVDESTALPHA       : srcBlend = GL_ONE_MINUS_DST_ALPHA;  break;
        case WINED3DBLEND_DESTCOLOR          : srcBlend = GL_DST_COLOR;  break;
        case WINED3DBLEND_INVDESTCOLOR       : srcBlend = GL_ONE_MINUS_DST_COLOR;  break;
        case WINED3DBLEND_SRCALPHASAT        : srcBlend = GL_SRC_ALPHA_SATURATE;  break;

        case WINED3DBLEND_BOTHSRCALPHA       : srcBlend = GL_SRC_ALPHA;
            dstBlend = GL_SRC_ALPHA;
            break;

        case WINED3DBLEND_BOTHINVSRCALPHA    : srcBlend = GL_ONE_MINUS_SRC_ALPHA;
            dstBlend = GL_ONE_MINUS_SRC_ALPHA;
            break;

        case WINED3DBLEND_BLENDFACTOR        : srcBlend = GL_CONSTANT_COLOR;   break;
        case WINED3DBLEND_INVBLENDFACTOR     : srcBlend = GL_ONE_MINUS_CONSTANT_COLOR;  break;
        default:
            FIXME("Unrecognized src blend value %d\n", stateblock->renderState[WINED3DRS_SRCBLEND]);
    }

    switch (stateblock->renderState[WINED3DRS_DESTBLEND]) {
        case WINED3DBLEND_ZERO               : dstBlend = GL_ZERO;  break;
        case WINED3DBLEND_ONE                : dstBlend = GL_ONE;  break;
        case WINED3DBLEND_SRCCOLOR           : dstBlend = GL_SRC_COLOR;  break;
        case WINED3DBLEND_INVSRCCOLOR        : dstBlend = GL_ONE_MINUS_SRC_COLOR;  break;
        case WINED3DBLEND_SRCALPHA           : dstBlend = GL_SRC_ALPHA;  break;
        case WINED3DBLEND_INVSRCALPHA        : dstBlend = GL_ONE_MINUS_SRC_ALPHA;  break;
        case WINED3DBLEND_DESTALPHA          : dstBlend = GL_DST_ALPHA;  break;
        case WINED3DBLEND_INVDESTALPHA       : dstBlend = GL_ONE_MINUS_DST_ALPHA;  break;
        case WINED3DBLEND_DESTCOLOR          : dstBlend = GL_DST_COLOR;  break;
        case WINED3DBLEND_INVDESTCOLOR       : dstBlend = GL_ONE_MINUS_DST_COLOR;  break;

        case WINED3DBLEND_SRCALPHASAT        :
            dstBlend = GL_SRC_ALPHA_SATURATE;
            WARN("Application uses SRCALPHASAT as dest blend factor, expect problems\n");