state.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

                    }
                    break;
                }
            }
            case WINED3DFOG_NONE: {
                /* Both are none? According to msdn the alpha channel of the specular
                 * color contains a fog factor. Set it in drawStridedSlow.
                 * Same happens with Vertexfog on transformed vertices
                 */
                if(GL_SUPPORT(EXT_FOG_COORD)) {
                    glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT);
                    checkGLcall("glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT)\n");
                    glFogi(GL_FOG_MODE, GL_LINEAR);
                    checkGLcall("glFogi(GL_FOG_MODE, GL_LINEAR)");
                    fogstart = 0xff;
                    fogend = 0x0;
                } else {
                    /* Disable GL fog, handle this in software in drawStridedSlow */
                    fogenable = FALSE;
                }
                break;
            }
            default: FIXME("Unexpected WINED3DRS_FOGVERTEXMODE %d\n", stateblock->renderState[WINED3DRS_FOGVERTEXMODE]);
        }
    } else {
        glHint(GL_FOG_HINT, GL_NICEST);
        checkGLcall("glHint(GL_FOG_HINT, GL_NICEST)");
        context->last_was_foggy_shader = FALSE;

        switch (stateblock->renderState[WINED3DRS_FOGTABLEMODE]) {
            case WINED3DFOG_EXP:
                glFogi(GL_FOG_MODE, GL_EXP);
                checkGLcall("glFogi(GL_FOG_MODE, GL_EXP");
                if(GL_SUPPORT(EXT_FOG_COORD)) {
                    glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT);
                    checkGLcall("glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT");
                }
                break;

            case WINED3DFOG_EXP2:
                glFogi(GL_FOG_MODE, GL_EXP2);
                checkGLcall("glFogi(GL_FOG_MODE, GL_EXP2");
                if(GL_SUPPORT(EXT_FOG_COORD)) {
                    glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT);
                    checkGLcall("glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT");
                }
                break;

            case WINED3DFOG_LINEAR:
                glFogi(GL_FOG_MODE, GL_LINEAR);
                checkGLcall("glFogi(GL_FOG_MODE, GL_LINEAR");
                if(GL_SUPPORT(EXT_FOG_COORD)) {
                    glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT);
                    checkGLcall("glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FRAGMENT_DEPTH_EXT");
                }
                break;

            case WINED3DFOG_NONE:   /* Won't happen */
            default:
                FIXME("Unexpected WINED3DRS_FOGTABLEMODE %d\n", stateblock->renderState[WINED3DRS_FOGTABLEMODE]);
        }
    }

    if(fogenable) {
        glEnable(GL_FOG);
        checkGLcall("glEnable GL_FOG");

        glFogfv(GL_FOG_START, &fogstart);
        checkGLcall("glFogf(GL_FOG_START, fogstart");
        TRACE("Fog Start == %f\n", fogstart);

        glFogfv(GL_FOG_END, &fogend);
        checkGLcall("glFogf(GL_FOG_END, fogend");
        TRACE("Fog End == %f\n", fogend);
    } else {
        glDisable(GL_FOG);
        checkGLcall("glDisable GL_FOG");
        if( use_ps(stateblock->wineD3DDevice) ) {
            /* disable fog in the pixel shader
             * NOTE: For pixel shader, GL_FOG_START and GL_FOG_END don't hold fog start s and end e but
             * -1/(e-s) and e/(e-s) respectively.
             */
            glFogf(GL_FOG_START, 0.0f);
            checkGLcall("glFogf(GL_FOG_START, fogstart");
            glFogf(GL_FOG_END, 1.0f);
            checkGLcall("glFogf(GL_FOG_END, fogend");
        }
    }

    if (GL_SUPPORT(NV_FOG_DISTANCE)) {
        glFogi(GL_FOG_DISTANCE_MODE_NV, GL_EYE_PLANE_ABSOLUTE_NV);
    }
}

static void state_fogcolor(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    float col[4];
    D3DCOLORTOGLFLOAT4(stateblock->renderState[WINED3DRS_FOGCOLOR], col);
    glFogfv(GL_FOG_COLOR, &col[0]);
    checkGLcall("glFog GL_FOG_COLOR");
}

static void state_fogdensity(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    union {
        DWORD d;
        float f;
    } tmpvalue;
    tmpvalue.d = stateblock->renderState[WINED3DRS_FOGDENSITY];
    glFogfv(GL_FOG_DENSITY, &tmpvalue.f);
    checkGLcall("glFogf(GL_FOG_DENSITY, (float) Value)");
}

/* TODO: Merge with primitive type + init_materials()!! */
static void state_colormat(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    IWineD3DDeviceImpl *device = (IWineD3DDeviceImpl *)stateblock->wineD3DDevice;
    GLenum Parm = 0;
    WineDirect3DStridedData *diffuse = &device->strided_streams.u.s.diffuse;
    BOOL isDiffuseSupplied;

    /* Depends on the decoded vertex declaration to read the existence of diffuse data.
     * The vertex declaration will call this function if the fixed function pipeline is used.
     */

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

    isDiffuseSupplied = diffuse->lpData || diffuse->VBO;

    context->num_untracked_materials = 0;
    if (isDiffuseSupplied && stateblock->renderState[WINED3DRS_COLORVERTEX]) {
        TRACE("diff %d, amb %d, emis %d, spec %d\n",
              stateblock->renderState[WINED3DRS_DIFFUSEMATERIALSOURCE],
              stateblock->renderState[WINED3DRS_AMBIENTMATERIALSOURCE],
              stateblock->renderState[WINED3DRS_EMISSIVEMATERIALSOURCE],
              stateblock->renderState[WINED3DRS_SPECULARMATERIALSOURCE]);

        if (stateblock->renderState[WINED3DRS_DIFFUSEMATERIALSOURCE] == WINED3DMCS_COLOR1) {
            if (stateblock->renderState[WINED3DRS_AMBIENTMATERIALSOURCE] == WINED3DMCS_COLOR1) {
                Parm = GL_AMBIENT_AND_DIFFUSE;
            } else {
                Parm = GL_DIFFUSE;
            }
            if(stateblock->renderState[WINED3DRS_EMISSIVEMATERIALSOURCE] == WINED3DMCS_COLOR1) {
                context->untracked_materials[context->num_untracked_materials] = GL_EMISSION;
                context->num_untracked_materials++;
            }
            if(stateblock->renderState[WINED3DRS_SPECULARMATERIALSOURCE] == WINED3DMCS_COLOR1) {
                context->untracked_materials[context->num_untracked_materials] = GL_SPECULAR;
                context->num_untracked_materials++;
            }
        } else if (stateblock->renderState[WINED3DRS_AMBIENTMATERIALSOURCE] == WINED3DMCS_COLOR1) {
            Parm = GL_AMBIENT;
            if(stateblock->renderState[WINED3DRS_EMISSIVEMATERIALSOURCE] == WINED3DMCS_COLOR1) {
                context->untracked_materials[context->num_untracked_materials] = GL_EMISSION;
                context->num_untracked_materials++;
            }
            if(stateblock->renderState[WINED3DRS_SPECULARMATERIALSOURCE] == WINED3DMCS_COLOR1) {
                context->untracked_materials[context->num_untracked_materials] = GL_SPECULAR;
                context->num_untracked_materials++;
            }
        } else if (stateblock->renderState[WINED3DRS_EMISSIVEMATERIALSOURCE] == WINED3DMCS_COLOR1) {
            Parm = GL_EMISSION;
            if(stateblock->renderState[WINED3DRS_SPECULARMATERIALSOURCE] == WINED3DMCS_COLOR1) {
                context->untracked_materials[context->num_untracked_materials] = GL_SPECULAR;
                context->num_untracked_materials++;
            }
        } else if (stateblock->renderState[WINED3DRS_SPECULARMATERIALSOURCE] == WINED3DMCS_COLOR1) {
            Parm = GL_SPECULAR;
        }
    }

    /* Nothing changed, return. */
    if (Parm == context->tracking_parm) return;

    if(!Parm) {
        glDisable(GL_COLOR_MATERIAL);
        checkGLcall("glDisable GL_COLOR_MATERIAL");
    } else {
        glColorMaterial(GL_FRONT_AND_BACK, Parm);
        checkGLcall("glColorMaterial(GL_FRONT_AND_BACK, Parm)");
        glEnable(GL_COLOR_MATERIAL);
        checkGLcall("glEnable(GL_COLOR_MATERIAL)");
    }

    /* Apparently calls to glMaterialfv are ignored for properties we're
     * tracking with glColorMaterial, so apply those here. */
    switch (context->tracking_parm) {
        case GL_AMBIENT_AND_DIFFUSE:
            glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, (float*)&device->updateStateBlock->material.Ambient);
            glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, (float*)&device->updateStateBlock->material.Diffuse);
            checkGLcall("glMaterialfv");
            break;

        case GL_DIFFUSE:
            glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, (float*)&device->updateStateBlock->material.Diffuse);
            checkGLcall("glMaterialfv");
            break;

        case GL_AMBIENT:
            glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, (float*)&device->updateStateBlock->material.Ambient);
            checkGLcall("glMaterialfv");
            break;

        case GL_EMISSION:
            glMaterialfv(GL_FRONT_AND_BACK, GL_EMISSION, (float*)&device->updateStateBlock->material.Emissive);
            checkGLcall("glMaterialfv");
            break;

        case GL_SPECULAR:
            /* Only change material color if specular is enabled, otherwise it is set to black */
            if (device->stateBlock->renderState[WINED3DRS_SPECULARENABLE]) {
                glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, (float*)&device->updateStateBlock->material.Specular);
                checkGLcall("glMaterialfv");
            } else {
                float black[4] = {0.0f, 0.0f, 0.0f, 0.0f};
                glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, &black[0]);
                checkGLcall("glMaterialfv");
            }
            break;
    }

    context->tracking_parm = Parm;
}

static void state_linepattern(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    union {
        DWORD                 d;
        WINED3DLINEPATTERN    lp;
    } tmppattern;
    tmppattern.d = stateblock->renderState[WINED3DRS_LINEPATTERN];

    TRACE("Line pattern: repeat %d bits %x\n", tmppattern.lp.wRepeatFactor, tmppattern.lp.wLinePattern);

    if (tmppattern.lp.wRepeatFactor) {
        glLineStipple(tmppattern.lp.wRepeatFactor, tmppattern.lp.wLinePattern);
        checkGLcall("glLineStipple(repeat, linepattern)");
        glEnable(GL_LINE_STIPPLE);
        checkGLcall("glEnable(GL_LINE_STIPPLE);");
    } else {
        glDisable(GL_LINE_STIPPLE);
        checkGLcall("glDisable(GL_LINE_STIPPLE);");
    }
}

static void state_zbias(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    union {
        DWORD d;
        float f;
    } tmpvalue;

    if (stateblock->renderState[WINED3DRS_ZBIAS]) {
        tmpvalue.d = stateblock->renderState[WINED3DRS_ZBIAS];
        TRACE("ZBias value %f\n", tmpvalue.f);
        glPolygonOffset(0, -tmpvalue.f);
        checkGLcall("glPolygonOffset(0, -Value)");
        glEnable(GL_POLYGON_OFFSET_FILL);
        checkGLcall("glEnable(GL_POLYGON_OFFSET_FILL);");
        glEnable(GL_POLYGON_OFFSET_LINE);
        checkGLcall("glEnable(GL_POLYGON_OFFSET_LINE);");
        glEnable(GL_POLYGON_OFFSET_POINT);
        checkGLcall("glEnable(GL_POLYGON_OFFSET_POINT);");
    } else {
        glDisable(GL_POLYGON_OFFSET_FILL);
        checkGLcall("glDisable(GL_POLYGON_OFFSET_FILL);");
        glDisable(GL_POLYGON_OFFSET_LINE);
        checkGLcall("glDisable(GL_POLYGON_OFFSET_LINE);");
        glDisable(GL_POLYGON_OFFSET_POINT);
        checkGLcall("glDisable(GL_POLYGON_OFFSET_POINT);");
    }
}


static void state_normalize(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    if (stateblock->renderState[WINED3DRS_NORMALIZENORMALS]) {
        glEnable(GL_NORMALIZE);
        checkGLcall("glEnable(GL_NORMALIZE);");
    } else {
        glDisable(GL_NORMALIZE);
        checkGLcall("glDisable(GL_NORMALIZE);");
    }
}

static void state_psize(DWORD state, IWineD3DStateBlockImpl *stateblock, WineD3DContext *context) {
    union {
        DWORD d;
        float f;
    } tmpvalue;

    /* FIXME: check that pointSize isn't outside glGetFloatv( GL_POINT_SIZE_MAX_ARB, &maxSize ); or -ve */
    tmpvalue.d = stateblock->renderState[WINED3DRS_POINTSIZE];
    TRACE("Set point size to %f\n", tmpvalue.f);