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#!/usr/bin/env python

# (C) Copyright IBM Corporation 2005

# All Rights Reserved.

#

# Permission is hereby granted, free of charge, to any person obtaining a

# copy of this software and associated documentation files (the "Software"),

# to deal in the Software without restriction, including without limitation

# on the rights to use, copy, modify, merge, publish, distribute, sub

# license, and/or sell copies of the Software, and to permit persons to whom

# the Software is furnished to do so, subject to the following conditions:

#

# The above copyright notice and this permission notice (including the next

# paragraph) shall be included in all copies or substantial portions of the

# Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL

# IBM AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

# IN THE SOFTWARE.

#

# Authors:

#    Ian Romanick 

import gl_XML, glX_XML, glX_proto_common, license

import sys, getopt, string

class PrintGlxDispatch_h(gl_XML.gl_print_base):

    def __init__(self):

        gl_XML.gl_print_base.__init__(self)

        self.name = "glX_proto_recv.py (from Mesa)"

        self.license = license.bsd_license_template % ( "(C) Copyright IBM Corporation 2005", "IBM")

        self.header_tag = "_INDIRECT_DISPATCH_H_"

        return

    def printRealHeader(self):

        print '#  include '

        print ''

        print 'struct __GLXclientStateRec;'

        print ''

        return

    def printBody(self, api):

        for func in api.functionIterateAll():

            if not func.ignore and not func.vectorequiv:

                if func.glx_rop:

                    print 'extern _X_HIDDEN void __glXDisp_%s(GLbyte * pc);' % (func.name)

                    print 'extern _X_HIDDEN void __glXDispSwap_%s(GLbyte * pc);' % (func.name)

                elif func.glx_sop or func.glx_vendorpriv:

                    print 'extern _X_HIDDEN int __glXDisp_%s(struct __GLXclientStateRec *, GLbyte *);' % (func.name)

                    print 'extern _X_HIDDEN int __glXDispSwap_%s(struct __GLXclientStateRec *, GLbyte *);' % (func.name)

                    if func.glx_sop and func.glx_vendorpriv:

                        n = func.glx_vendorpriv_names[0]

                        print 'extern _X_HIDDEN int __glXDisp_%s(struct __GLXclientStateRec *, GLbyte *);' % (n)

                        print 'extern _X_HIDDEN int __glXDispSwap_%s(struct __GLXclientStateRec *, GLbyte *);' % (n)

        return

class PrintGlxDispatchFunctions(glX_proto_common.glx_print_proto):

    def __init__(self, do_swap):

        gl_XML.gl_print_base.__init__(self)

        self.name = "glX_proto_recv.py (from Mesa)"

        self.license = license.bsd_license_template % ( "(C) Copyright IBM Corporation 2005", "IBM")

        self.real_types = [ '', '', 'uint16_t', '', 'uint32_t', '', '', '', 'uint64_t' ]

        self.do_swap = do_swap

        return

    def printRealHeader(self):

        print '#include '

        print '#include '

        print '#include '

        print '#include '

        print '#include "indirect_size.h"'

        print '#include "indirect_size_get.h"'

        print '#include "indirect_dispatch.h"'

        print '#include "glxserver.h"'

        print '#include "glxbyteorder.h"'

        print '#include "indirect_util.h"'

        print '#include "singlesize.h"'

        print '#include "glapi.h"'

        print '#include "glapitable.h"'

        print '#include "glthread.h"'

        print '#include "dispatch.h"'

        print ''

        print '#define __GLX_PAD(x)  (((x) + 3) & ~3)'

        print ''

        print 'typedef struct {'

        print '    __GLX_PIXEL_3D_HDR;'

        print '} __GLXpixel3DHeader;'

        print ''

        print 'extern GLboolean __glXErrorOccured( void );'

        print 'extern void __glXClearErrorOccured( void );'

        print ''

        print 'static const unsigned dummy_answer[2] = {0, 0};'

        print ''

        return

    def printBody(self, api):

        if self.do_swap:

            self.emit_swap_wrappers(api)

        for func in api.functionIterateByOffset():

            if not func.ignore and not func.server_handcode and not func.vectorequiv and (func.glx_rop or func.glx_sop or func.glx_vendorpriv):

                self.printFunction(func, func.name)

                if func.glx_sop and func.glx_vendorpriv:

                    self.printFunction(func, func.glx_vendorpriv_names[0])

        return

    def printFunction(self, f, name):

        if (f.glx_sop or f.glx_vendorpriv) and (len(f.get_images()) != 0):

            return

        if not self.do_swap:

            base = '__glXDisp'

        else:

            base = '__glXDispSwap'

        if f.glx_rop:

            print 'void %s_%s(GLbyte * pc)' % (base, name)

        else:

            print 'int %s_%s(__GLXclientState *cl, GLbyte *pc)' % (base, name)

        print '{'

        if f.glx_rop or f.vectorequiv:

            self.printRenderFunction(f)

        elif f.glx_sop or f.glx_vendorpriv:

            if len(f.get_images()) == 0:

                self.printSingleFunction(f, name)

        else:

            print "/* Missing GLX protocol for %s. */" % (name)

        print '}'

        print ''

        return

    def swap_name(self, bytes):

        return 'bswap_%u_array' % (8 * bytes)

    def emit_swap_wrappers(self, api):

        self.type_map = {}

        already_done = [ ]

        for t in api.typeIterate():

            te = t.get_type_expression()

            t_size = te.get_element_size()

            if t_size > 1 and t.glx_name:

                t_name = "GL" + t.name

                self.type_map[ t_name ] = t.glx_name

                if t.glx_name not in already_done:

                    real_name = self.real_types[t_size]

                    print 'static %s' % (t_name)

                    print 'bswap_%s( const void * src )' % (t.glx_name)

                    print '{'

                    print '    union { %s dst; %s ret; } x;' % (real_name, t_name)

                    print '    x.dst = bswap_%u( *(%s *) src );' % (t_size * 8, real_name)

                    print '    return x.ret;'

                    print '}'

                    print ''

                    already_done.append( t.glx_name )

        for bits in [16, 32, 64]:

            print 'static void *'

            print 'bswap_%u_array( uint%u_t * src, unsigned count )' % (bits, bits)

            print '{'

            print '    unsigned  i;'

            print ''

            print '    for ( i = 0 ; i < count ; i++ ) {'

            print '        uint%u_t temp = bswap_%u( src[i] );' % (bits, bits)

            print '        src[i] = temp;'

            print '    }'

            print ''

            print '    return src;'

            print '}'

            print ''

    def fetch_param(self, param):

        t = param.type_string()

        o = param.offset

        element_size = param.size() / param.get_element_count()

        if self.do_swap and (element_size != 1):

            if param.is_array():

                real_name = self.real_types[ element_size ]

                swap_func = self.swap_name( element_size )

                return ' (%-8s)%s( (%s *) (pc + %2s), %s )' % (t, swap_func, real_name, o, param.count)

            else:

                t_name = param.get_base_type_string()

                return ' (%-8s)bswap_%-7s( pc + %2s )' % (t, self.type_map[ t_name ], o)

        else:

            if param.is_array():

                return ' (%-8s)(pc + %2u)' % (t, o)

            else:

                return '*(%-8s *)(pc + %2u)' % (t, o)

        return None

    def emit_function_call(self, f, retval_assign, indent):

        list = []

        for param in f.parameterIterator():

            if param.is_padding:

                continue

            if param.is_counter or param.is_image() or param.is_output or param.name in f.count_parameter_list or len(param.count_parameter_list):

                location = param.name

            else:

                location = self.fetch_param(param)

            list.append( '%s        %s' % (indent, location) )

        if len( list ):

            print '%s    %sCALL_%s( GET_DISPATCH(), (' % (indent, retval_assign, f.name)

            print string.join( list, ",\n" )

            print '%s    ) );' % (indent)

        else:

            print '%s    %sCALL_%s( GET_DISPATCH(), () );' % (indent, retval_assign, f.name)

        return

    def common_func_print_just_start(self, f, indent):

        align64 = 0

        need_blank = 0

        f.calculate_offsets()

        for param in f.parameterIterateGlxSend():

            # If any parameter has a 64-bit base type, then we

            # have to do alignment magic for the while thing.

            if param.is_64_bit():

                align64 = 1

            # FIXME img_null_flag is over-loaded.  In addition to

            # FIXME being used for images, it is used to signify

            # FIXME NULL data pointers for vertex buffer object

            # FIXME related functions.  Re-name it to null_data

            # FIXME or something similar.

            if param.img_null_flag:

                print '%s    const CARD32 ptr_is_null = *(CARD32 *)(pc + %s);' % (indent, param.offset - 4)

                cond = '(ptr_is_null != 0) ? NULL : '

            else:

                cond = ""

            type_string = param.type_string()

            if param.is_image():

                offset = f.offset_of( param.name )

                print '%s    %s const %s = (%s) (%s(pc + %s));' % (indent, type_string, param.name, type_string, cond, offset)

                if param.depth:

                    print '%s    __GLXpixel3DHeader * const hdr = (__GLXpixel3DHeader *)(pc);' % (indent)

                else:

                    print '%s    __GLXpixelHeader * const hdr = (__GLXpixelHeader *)(pc);' % (indent)

                need_blank = 1

            elif param.is_counter or param.name in f.count_parameter_list:

                location = self.fetch_param(param)

                print '%s    const %s %s = %s;' % (indent, type_string, param.name, location)

                need_blank = 1

            elif len(param.count_parameter_list):

                if param.size() == 1 and not self.do_swap:

                    location = self.fetch_param(param)

                    print '%s    %s %s = %s%s;' % (indent, type_string, param.name, cond, location)

                else:

                    print '%s    %s %s;' % (indent, type_string, param.name)

                need_blank = 1

        if need_blank:

            print ''

        if align64:

            print '#ifdef __GLX_ALIGN64'

            if f.has_variable_size_request():

                self.emit_packet_size_calculation(f, 4)

                s = "cmdlen"

            else:

                s = str((f.command_fixed_length() + 3) & ~3)

            print '    if ((unsigned long)(pc) & 7) {'

            print '        (void) memmove(pc-4, pc, %s);' % (s)

            print '        pc -= 4;'

            print '    }'

            print '#endif'

            print ''

        need_blank = 0

        if self.do_swap:

            for param in f.parameterIterateGlxSend():

                if param.count_parameter_list:

                    o = param.offset

                    count = param.get_element_count()

                    type_size = param.size() / count

                    if param.counter:

                        count_name = param.counter

                    else:

                        count_name = str(count)

                    # This is basically an ugly special-

                    # case for glCallLists.

                    if type_size == 1:

                        x = []

                        x.append( [1, ['BYTE', 'UNSIGNED_BYTE', '2_BYTES', '3_BYTES', '4_BYTES']] )

                        x.append( [2, ['SHORT', 'UNSIGNED_SHORT']] )

                        x.append( [4, ['INT', 'UNSIGNED_INT', 'FLOAT']] )

                        print '    switch(%s) {' % (param.count_parameter_list[0])

                        for sub in x:

                            for t_name in sub[1]:

                                print '    case GL_%s:' % (t_name)

                            if sub[0] == 1:

                                print '        %s = (%s) (pc + %s); break;' % (param.name, param.type_string(), o)

                            else:

                                swap_func = self.swap_name(sub[0])

                                print '        %s = (%s) %s( (%s *) (pc + %s), %s ); break;' % (param.name, param.type_string(), swap_func, self.real_types[sub[0]], o, count_name)

                        print '    default:'

                        print '        return;'

                        print '    }'

                    else:

                        swap_func = self.swap_name(type_size)

                        compsize = self.size_call(f, 1)

                        print '    %s = (%s) %s( (%s *) (pc + %s), %s );' % (param.name, param.type_string(), swap_func, self.real_types[type_size], o, compsize)

                    need_blank = 1

        else:

            for param in f.parameterIterateGlxSend():

                if param.count_parameter_list:

                    print '%s    %s = (%s) (pc + %s);' % (indent, param.name, param.type_string(), param.offset)

                    need_blank = 1

        if need_blank:

            print ''

        return

    def printSingleFunction(self, f, name):

        if name not in f.glx_vendorpriv_names:

            print '    xGLXSingleReq * const req = (xGLXSingleReq *) pc;'

        else:

            print '    xGLXVendorPrivateReq * const req = (xGLXVendorPrivateReq *) pc;'

        print '    int error;'

        if self.do_swap:

            print '    __GLXcontext * const cx = __glXForceCurrent(cl, bswap_CARD32( &req->contextTag ), &error);'

        else:

            print '    __GLXcontext * const cx = __glXForceCurrent(cl, req->contextTag, &error);'

        print ''

        if name not in f.glx_vendorpriv_names:

            print '    pc += __GLX_SINGLE_HDR_SIZE;'

        else:

            print '    pc += __GLX_VENDPRIV_HDR_SIZE;'

        print '    if ( cx != NULL ) {'

        self.common_func_print_just_start(f, "    ")

        if f.return_type != 'void':

            print '        %s retval;' % (f.return_type)

            retval_string = "retval"

            retval_assign = "retval = "

        else:

            retval_string = "0"

            retval_assign = ""

        type_size = 0

        answer_string = "dummy_answer"

        answer_count = "0"

        is_array_string = "GL_FALSE"

        for param in f.parameterIterateOutputs():

            answer_type = param.get_base_type_string()

            if answer_type == "GLvoid":

                answer_type = "GLubyte"

            c = param.get_element_count()

            type_size = (param.size() / c)

            if type_size == 1:

                size_scale = ""

            else:

                size_scale = " * %u" % (type_size)

            if param.count_parameter_list:

                print '        const GLuint compsize = %s;' % (self.size_call(f, 1))

                print '        %s answerBuffer[200];' %  (answer_type)

                print '        %s %s = __glXGetAnswerBuffer(cl, compsize%s, answerBuffer, sizeof(answerBuffer), %u);' % (param.type_string(), param.name, size_scale, type_size )

                answer_string = param.name

                answer_count = "compsize"

                print ''

                print '        if (%s == NULL) return BadAlloc;' % (param.name)

                print '        __glXClearErrorOccured();'

                print ''

            elif param.counter:

                print '        %s answerBuffer[200];' %  (answer_type)

                print '        %s %s = __glXGetAnswerBuffer(cl, %s%s, answerBuffer, sizeof(answerBuffer), %u);' % (param.type_string(), param.name, param.counter, size_scale, type_size)

                answer_string = param.name

                answer_count = param.counter

            elif c >= 1:

                print '        %s %s[%u];' % (answer_type, param.name, c)

                answer_string = param.name

                answer_count = "%u" % (c)

            if f.reply_always_array:

                is_array_string = "GL_TRUE"

        self.emit_function_call(f, retval_assign, "    ")

        if f.needs_reply():

            if self.do_swap:

                for param in f.parameterIterateOutputs():

                    c = param.get_element_count()

                    type_size = (param.size() / c)

                    if type_size > 1:

                        swap_name = self.swap_name( type_size )

                        print '        (void) %s( (uint%u_t *) %s, %s );' % (swap_name, 8 * type_size, param.name, answer_count)

                reply_func = '__glXSendReplySwap'

            else:

                reply_func = '__glXSendReply'

            print '        %s(cl->client, %s, %s, %u, %s, %s);' % (reply_func, answer_string, answer_count, type_size, is_array_string, retval_string)

        #elif f.note_unflushed:

        #	print '        cx->hasUnflushedCommands = GL_TRUE;'

        print '        error = Success;'

        print '    }'

        print ''

        print '    return error;'

        return

    def printRenderFunction(self, f):

        # There are 4 distinct phases in a rendering dispatch function.

        # In the first phase we compute the sizes and offsets of each

        # element in the command.  In the second phase we (optionally)

        # re-align 64-bit data elements.  In the third phase we

        # (optionally) byte-swap array data.  Finally, in the fourth

        # phase we actually dispatch the function.

        self.common_func_print_just_start(f, "")

        images = f.get_images()

        if len(images):

            if self.do_swap:

                pre = "bswap_CARD32( & "

                post = " )"

            else:

                pre = ""

                post = ""

            img = images[0]

            # swapBytes and lsbFirst are single byte fields, so

            # the must NEVER be byte-swapped.

            if not (img.img_type == "GL_BITMAP" and img.img_format == "GL_COLOR_INDEX"):

                print '    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SWAP_BYTES,   hdr->swapBytes) );'

            print '    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_LSB_FIRST,    hdr->lsbFirst) );'

            print '    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_ROW_LENGTH,   (GLint) %shdr->rowLength%s) );' % (pre, post)

            if img.depth:

                print '    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_IMAGE_HEIGHT, (GLint) %shdr->imageHeight%s) );' % (pre, post)

            print '    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_ROWS,    (GLint) %shdr->skipRows%s) );' % (pre, post)

            if img.depth:

                print '    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_IMAGES,  (GLint) %shdr->skipImages%s) );' % (pre, post)

            print '    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_SKIP_PIXELS,  (GLint) %shdr->skipPixels%s) );' % (pre, post)

            print '    CALL_PixelStorei( GET_DISPATCH(), (GL_UNPACK_ALIGNMENT,    (GLint) %shdr->alignment%s) );' % (pre, post)

            print ''

        self.emit_function_call(f, "", "")

        return

if __name__ == '__main__':

    file_name = "gl_API.xml"

    try:

        (args, trail) = getopt.getopt(sys.argv[1:], "f:m:s")

    except Exception,e:

        show_usage()

    mode = "dispatch_c"

    do_swap = 0

    for (arg,val) in args:

        if arg == "-f":

            file_name = val

        elif arg == "-m":

            mode = val

        elif arg == "-s":

            do_swap = 1

    if mode == "dispatch_c":

        printer = PrintGlxDispatchFunctions(do_swap)

    elif mode == "dispatch_h":

        printer = PrintGlxDispatch_h()

    else:

        show_usage()

    api = gl_XML.parse_GL_API( file_name, glX_proto_common.glx_proto_item_factory() )

    printer.Print( api )