directx.c

这是一个开放源代码的与WINNT/WIN2K/WIN2003兼容的操作系统

    }
    *ppobj = NULL;
    return E_NOINTERFACE;
}

static ULONG WINAPI IWineD3DImpl_AddRef(IWineD3D *iface) {
    IWineD3DImpl *This = (IWineD3DImpl *)iface;
    ULONG refCount = InterlockedIncrement(&This->ref);

    TRACE("(%p) : AddRef increasing from %d\n", This, refCount - 1);
    return refCount;
}

static ULONG WINAPI IWineD3DImpl_Release(IWineD3D *iface) {
    IWineD3DImpl *This = (IWineD3DImpl *)iface;
    ULONG ref;
    TRACE("(%p) : Releasing from %d\n", This, This->ref);
    ref = InterlockedDecrement(&This->ref);
    if (ref == 0) {
        HeapFree(GetProcessHeap(), 0, This);
    }

    return ref;
}

/* Set the shader type for this device, depending on the given capabilities,
 * the device type, and the user preferences in wined3d_settings */

static void select_shader_mode(
    WineD3D_GL_Info *gl_info,
    WINED3DDEVTYPE DeviceType,
    int* ps_selected,
    int* vs_selected) {

    if (wined3d_settings.vs_mode == VS_NONE) {
        *vs_selected = SHADER_NONE;
    } else if (gl_info->supported[ARB_VERTEX_SHADER] && wined3d_settings.glslRequested) {
        *vs_selected = SHADER_GLSL;
    } else if (gl_info->supported[ARB_VERTEX_PROGRAM]) {
        *vs_selected = SHADER_ARB;
    } else {
        *vs_selected = SHADER_NONE;
    }

    if (wined3d_settings.ps_mode == PS_NONE) {
        *ps_selected = SHADER_NONE;
    } else if (gl_info->supported[ARB_FRAGMENT_SHADER] && wined3d_settings.glslRequested) {
        *ps_selected = SHADER_GLSL;
    } else if (gl_info->supported[ARB_FRAGMENT_PROGRAM]) {
        *ps_selected = SHADER_ARB;
    } else {
        *ps_selected = SHADER_NONE;
    }
}

/** Select the number of report maximum shader constants based on the selected shader modes */
static void select_shader_max_constants(
    int ps_selected_mode,
    int vs_selected_mode,
    WineD3D_GL_Info *gl_info) {

    switch (vs_selected_mode) {
        case SHADER_GLSL:
            /* Subtract the other potential uniforms from the max available (bools, ints, and 1 row of projection matrix) */
            gl_info->max_vshader_constantsF = gl_info->vs_glsl_constantsF - (MAX_CONST_B / 4) - MAX_CONST_I - 1;
            break;
        case SHADER_ARB:
            /* We have to subtract any other PARAMs that we might use in our shader programs.
             * ATI seems to count 2 implicit PARAMs when we use fog and NVIDIA counts 1,
             * and we reference one row of the PROJECTION matrix which counts as 1 PARAM. */
            gl_info->max_vshader_constantsF = gl_info->vs_arb_constantsF - 3;
            break;
        default:
            gl_info->max_vshader_constantsF = 0;
            break;
    }

    switch (ps_selected_mode) {
        case SHADER_GLSL:
            /* Subtract the other potential uniforms from the max available (bools & ints), and 2 states for fog.
             * In theory the texbem instruction may need one more shader constant too. But lets assume
             * that a sm <= 1.3 shader does not need all the uniforms provided by a glsl-capable card,
             * and lets not take away a uniform needlessly from all other shaders.
             */
            gl_info->max_pshader_constantsF = gl_info->ps_glsl_constantsF - (MAX_CONST_B / 4) - MAX_CONST_I - 2;
            break;
        case SHADER_ARB:
            /* The arb shader only loads the bump mapping environment matrix into the shader if it finds
             * a free constant to do that, so only reduce the number of available constants by 2 for the fog states.
             */
            gl_info->max_pshader_constantsF = gl_info->ps_arb_constantsF - 2;
            break;
        default:
            gl_info->max_pshader_constantsF = 0;
            break;
    }
}

/**********************************************************
 * IWineD3D parts follows
 **********************************************************/

#define GLINFO_LOCATION (*gl_info)
BOOL IWineD3DImpl_FillGLCaps(WineD3D_GL_Info *gl_info) {
    const char *GL_Extensions    = NULL;
    const char *WGL_Extensions   = NULL;
    const char *gl_string        = NULL;
    const char *gl_string_cursor = NULL;
    GLint       gl_max;
    GLfloat     gl_floatv[2];
    int         major = 1, minor = 0;
    BOOL        return_value = TRUE;
    int         i;
    HDC         hdc;
    HMODULE     mod_gl;

#ifdef USE_WIN32_OPENGL
#define USE_GL_FUNC(pfn) pfn = (void*)GetProcAddress(mod_gl, #pfn);
    mod_gl = LoadLibraryA("opengl32.dll");
    if(!mod_gl) {
        ERR("Can't load opengl32.dll!\n");
        return FALSE;
    }
#else
#define USE_GL_FUNC(pfn) pfn = (void*)pwglGetProcAddress(#pfn);
    /* To bypass the opengl32 thunks load wglGetProcAddress from gdi32 (glXGetProcAddress wrapper) instead of opengl32's */
    mod_gl = GetModuleHandleA("gdi32.dll");
#endif

/* Load WGL core functions from opengl32.dll */
#define USE_WGL_FUNC(pfn) p##pfn = (void*)GetProcAddress(mod_gl, #pfn);
    WGL_FUNCS_GEN;
#undef USE_WGL_FUNC

    if(!pwglGetProcAddress) {
        ERR("Unable to load wglGetProcAddress!\n");
        return FALSE;
    }

/* Dynamicly load all GL core functions */
    GL_FUNCS_GEN;
#undef USE_GL_FUNC

    /* Make sure that we've got a context */
    /* TODO: CreateFakeGLContext should really take a display as a parameter  */
    /* Only save the values obtained when a display is provided */
    if (!WineD3D_CreateFakeGLContext() || wined3d_fake_gl_context_foreign)
        return_value = FALSE;

    TRACE_(d3d_caps)("(%p)\n", gl_info);

    gl_string = (const char *) glGetString(GL_RENDERER);
    if (NULL == gl_string)
	gl_string = "None";
    strcpy(gl_info->gl_renderer, gl_string);

    gl_string = (const char *) glGetString(GL_VENDOR);
    TRACE_(d3d_caps)("Filling vendor string %s\n", gl_string);
    if (gl_string != NULL) {
        /* Fill in the GL vendor */
        if (strstr(gl_string, "NVIDIA")) {
            gl_info->gl_vendor = VENDOR_NVIDIA;
        } else if (strstr(gl_string, "ATI")) {
            gl_info->gl_vendor = VENDOR_ATI;
        } else if (strstr(gl_string, "Intel(R)") || 
		   strstr(gl_info->gl_renderer, "Intel(R)")) {
            gl_info->gl_vendor = VENDOR_INTEL;
        } else if (strstr(gl_string, "Mesa")) {
            gl_info->gl_vendor = VENDOR_MESA;
        } else {
            gl_info->gl_vendor = VENDOR_WINE;
        }
    } else {
        gl_info->gl_vendor = VENDOR_WINE;
    }


    TRACE_(d3d_caps)("found GL_VENDOR (%s)->(0x%04x)\n", debugstr_a(gl_string), gl_info->gl_vendor);

    /* Parse the GL_VERSION field into major and minor information */
    gl_string = (const char *) glGetString(GL_VERSION);
    if (gl_string != NULL) {

        switch (gl_info->gl_vendor) {
        case VENDOR_NVIDIA:
            gl_string_cursor = strstr(gl_string, "NVIDIA");
            if (!gl_string_cursor) {
                ERR_(d3d_caps)("Invalid nVidia version string: %s\n", debugstr_a(gl_string));
                break;
            }

            gl_string_cursor = strstr(gl_string_cursor, " ");
            if (!gl_string_cursor) {
                ERR_(d3d_caps)("Invalid nVidia version string: %s\n", debugstr_a(gl_string));
                break;
            }

            while (*gl_string_cursor == ' ') {
                ++gl_string_cursor;
            }

            if (!*gl_string_cursor) {
                ERR_(d3d_caps)("Invalid nVidia version string: %s\n", debugstr_a(gl_string));
                break;
            }

            major = atoi(gl_string_cursor);
            while (*gl_string_cursor <= '9' && *gl_string_cursor >= '0') {
                ++gl_string_cursor;
            }

            if (*gl_string_cursor++ != '.') {
                ERR_(d3d_caps)("Invalid nVidia version string: %s\n", debugstr_a(gl_string));
                break;
            }

            minor = atoi(gl_string_cursor);
            minor = major*100+minor;
            major = 10;

            break;

        case VENDOR_ATI:
            major = minor = 0;
            gl_string_cursor = strchr(gl_string, '-');
            if (gl_string_cursor) {
                int error = 0;
                gl_string_cursor++;

                /* Check if version number is of the form x.y.z */
                if (*gl_string_cursor > '9' && *gl_string_cursor < '0')
                    error = 1;
                if (!error && *(gl_string_cursor+2) > '9' && *(gl_string_cursor+2) < '0')
                    error = 1;
                if (!error && *(gl_string_cursor+4) > '9' && *(gl_string_cursor+4) < '0')
                    error = 1;
                if (!error && *(gl_string_cursor+1) != '.' && *(gl_string_cursor+3) != '.')
                    error = 1;

                /* Mark version number as malformed */
                if (error)
                    gl_string_cursor = 0;
            }

            if (!gl_string_cursor)
                WARN_(d3d_caps)("malformed GL_VERSION (%s)\n", debugstr_a(gl_string));
            else {
                major = *gl_string_cursor - '0';
                minor = (*(gl_string_cursor+2) - '0') * 256 + (*(gl_string_cursor+4) - '0');
            }
            break;

	case VENDOR_INTEL:
        case VENDOR_MESA:
            gl_string_cursor = strstr(gl_string, "Mesa");
            gl_string_cursor = strstr(gl_string_cursor, " ");
            while (*gl_string_cursor && ' ' == *gl_string_cursor) ++gl_string_cursor;
            if (*gl_string_cursor) {
                char tmp[16];
                int cursor = 0;

                while (*gl_string_cursor <= '9' && *gl_string_cursor >= '0') {
                    tmp[cursor++] = *gl_string_cursor;
                    ++gl_string_cursor;
                }
                tmp[cursor] = 0;
                major = atoi(tmp);

                if (*gl_string_cursor != '.') WARN_(d3d_caps)("malformed GL_VERSION (%s)\n", debugstr_a(gl_string));
                ++gl_string_cursor;

                cursor = 0;
                while (*gl_string_cursor <= '9' && *gl_string_cursor >= '0') {
                    tmp[cursor++] = *gl_string_cursor;
                    ++gl_string_cursor;
                }
                tmp[cursor] = 0;
                minor = atoi(tmp);
            }
            break;

        default:
            major = 0;
            minor = 9;
        }
        gl_info->gl_driver_version = MAKEDWORD_VERSION(major, minor);
        TRACE_(d3d_caps)("found GL_VERSION  (%s)->%i.%i->(0x%08x)\n", debugstr_a(gl_string), major, minor, gl_info->gl_driver_version);
    }

    TRACE_(d3d_caps)("found GL_RENDERER (%s)->(0x%04x)\n", debugstr_a(gl_info->gl_renderer), gl_info->gl_card);