204 lines
8.1 KiB
C
204 lines
8.1 KiB
C
#ifndef __GLX_packrender_h__
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#define __GLX_packrender_h__
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/*
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* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice including the dates of first publication and
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* either this permission notice or a reference to
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* http://oss.sgi.com/projects/FreeB/
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* shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of Silicon Graphics, Inc.
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* shall not be used in advertising or otherwise to promote the sale, use or
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* other dealings in this Software without prior written authorization from
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* Silicon Graphics, Inc.
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*/
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#include "glxclient.h"
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/*
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** The macros in this header convert the client machine's native data types to
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** wire protocol data types. The header is part of the porting layer of the
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** client library, and it is intended that hardware vendors will rewrite this
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** header to suit their own machines.
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*/
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/*
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** Pad a count of bytes to the nearest multiple of 4. The X protocol
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** transfers data in 4 byte quantities, so this macro is used to
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** insure the right amount of data being sent.
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*/
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#define __GLX_PAD(a) (((a)+3) & ~3)
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/*
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** Network size parameters
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*/
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#define sz_double 8
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/* Setup for all commands */
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#define __GLX_DECLARE_VARIABLES() \
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struct glx_context *gc; \
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GLubyte *pc, *pixelHeaderPC; \
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GLuint compsize, cmdlen
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#define __GLX_LOAD_VARIABLES() \
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gc = __glXGetCurrentContext(); \
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pc = gc->pc; \
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/* Muffle compilers */ \
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cmdlen = 0; (void)cmdlen; \
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compsize = 0; (void)compsize; \
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pixelHeaderPC = NULL; (void)pixelHeaderPC
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/*
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** Variable sized command support macro. This macro is used by calls
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** that are potentially larger than __GLX_SMALL_RENDER_CMD_SIZE.
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** Because of their size, they may not automatically fit in the buffer.
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** If the buffer can't hold the command then it is flushed so that
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** the command will fit in the next buffer.
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*/
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#define __GLX_BEGIN_VARIABLE(opcode,size) \
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if (pc + (size) > gc->bufEnd) { \
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pc = __glXFlushRenderBuffer(gc, pc); \
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} \
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__GLX_PUT_SHORT(0,size); \
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__GLX_PUT_SHORT(2,opcode)
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#define __GLX_BEGIN_VARIABLE_LARGE(opcode,size) \
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pc = __glXFlushRenderBuffer(gc, pc); \
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__GLX_PUT_LONG(0,size); \
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__GLX_PUT_LONG(4,opcode)
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#define __GLX_BEGIN_VARIABLE_WITH_PIXEL(opcode,size) \
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if (pc + (size) > gc->bufEnd) { \
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pc = __glXFlushRenderBuffer(gc, pc); \
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} \
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__GLX_PUT_SHORT(0,size); \
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__GLX_PUT_SHORT(2,opcode); \
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pc += __GLX_RENDER_HDR_SIZE; \
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pixelHeaderPC = pc; \
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pc += __GLX_PIXEL_HDR_SIZE
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#define __GLX_BEGIN_VARIABLE_LARGE_WITH_PIXEL(opcode,size) \
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pc = __glXFlushRenderBuffer(gc, pc); \
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__GLX_PUT_LONG(0,size); \
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__GLX_PUT_LONG(4,opcode); \
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pc += __GLX_RENDER_LARGE_HDR_SIZE; \
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pixelHeaderPC = pc; \
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pc += __GLX_PIXEL_HDR_SIZE
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#define __GLX_BEGIN_VARIABLE_WITH_PIXEL_3D(opcode,size) \
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if (pc + (size) > gc->bufEnd) { \
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pc = __glXFlushRenderBuffer(gc, pc); \
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} \
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__GLX_PUT_SHORT(0,size); \
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__GLX_PUT_SHORT(2,opcode); \
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pc += __GLX_RENDER_HDR_SIZE; \
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pixelHeaderPC = pc; \
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pc += __GLX_PIXEL_3D_HDR_SIZE
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#define __GLX_BEGIN_VARIABLE_LARGE_WITH_PIXEL_3D(opcode,size) \
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pc = __glXFlushRenderBuffer(gc, pc); \
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__GLX_PUT_LONG(0,size); \
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__GLX_PUT_LONG(4,opcode); \
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pc += __GLX_RENDER_LARGE_HDR_SIZE; \
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pixelHeaderPC = pc; \
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pc += __GLX_PIXEL_3D_HDR_SIZE
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/*
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** Fixed size command support macro. This macro is used by calls that
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** are never larger than __GLX_SMALL_RENDER_CMD_SIZE. Because they
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** always fit in the buffer, and because the buffer promises to
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** maintain enough room for them, we don't need to check for space
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** before doing the storage work.
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*/
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#define __GLX_BEGIN(opcode,size) \
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__GLX_PUT_SHORT(0,size); \
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__GLX_PUT_SHORT(2,opcode)
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/*
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** Finish a rendering command by advancing the pc. If the pc is now past
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** the limit pointer then there is no longer room for a
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** __GLX_SMALL_RENDER_CMD_SIZE sized command, which will break the
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** assumptions present in the __GLX_BEGIN macro. In this case the
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** rendering buffer is flushed out into the X protocol stream (which may
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** or may not do I/O).
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*/
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#define __GLX_END(size) \
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pc += size; \
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if (pc > gc->limit) { \
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(void) __glXFlushRenderBuffer(gc, pc); \
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} else { \
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gc->pc = pc; \
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}
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/* Array copy macros */
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#define __GLX_MEM_COPY(dest,src,bytes) \
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if (src && dest) \
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memcpy(dest, src, bytes)
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/* Single item copy macros */
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#define __GLX_PUT_CHAR(offset,a) \
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do { \
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int8_t __tmp = (a); \
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memcpy((pc + (offset)), &__tmp, 1); \
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} while (0)
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#define __GLX_PUT_SHORT(offset,a) \
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do { \
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int16_t __tmp = (a); \
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memcpy((pc + (offset)), &__tmp, 2); \
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} while (0)
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#define __GLX_PUT_LONG(offset,a) \
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do { \
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int32_t __tmp = (a); \
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memcpy((pc + (offset)), &__tmp, 4); \
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} while (0)
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#define __GLX_PUT_FLOAT(offset,a) \
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do { \
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float __tmp = (a); \
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memcpy((pc + (offset)), &__tmp, 4); \
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} while (0)
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#define __GLX_PUT_DOUBLE(offset,a) \
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do { \
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double __tmp = (a); \
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memcpy((pc + (offset)), &__tmp, 8); \
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} while (0)
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#define __GLX_PUT_CHAR_ARRAY(offset,a,alen) \
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__GLX_MEM_COPY(pc + offset, a, alen * __GLX_SIZE_INT8)
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#define __GLX_PUT_SHORT_ARRAY(offset,a,alen) \
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__GLX_MEM_COPY(pc + offset, a, alen * __GLX_SIZE_INT16)
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#define __GLX_PUT_LONG_ARRAY(offset,a,alen) \
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__GLX_MEM_COPY(pc + offset, a, alen * __GLX_SIZE_INT32)
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#define __GLX_PUT_FLOAT_ARRAY(offset,a,alen) \
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__GLX_MEM_COPY(pc + offset, a, alen * __GLX_SIZE_FLOAT32)
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#define __GLX_PUT_DOUBLE_ARRAY(offset,a,alen) \
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__GLX_MEM_COPY(pc + offset, a, alen * __GLX_SIZE_FLOAT64)
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#endif /* !__GLX_packrender_h__ */
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