469 lines
14 KiB
C
469 lines
14 KiB
C
/*
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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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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <GL/gl.h>
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#include "glxserver.h"
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#include "GL/glxproto.h"
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#include "unpack.h"
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#include "indirect_size.h"
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#include "indirect_reqsize.h"
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#define SWAPL(a) \
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(((a & 0xff000000U)>>24) | ((a & 0xff0000U)>>8) | \
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((a & 0xff00U)<<8) | ((a & 0xffU)<<24))
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int
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__glXMap1dReqSize(const GLbyte * pc, Bool swap, int reqlen)
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{
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GLenum target;
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GLint order;
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target = *(GLenum *) (pc + 16);
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order = *(GLint *) (pc + 20);
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if (swap) {
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target = SWAPL(target);
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order = SWAPL(order);
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}
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if (order < 1)
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return -1;
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return safe_mul(8, safe_mul(__glMap1d_size(target), order));
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}
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int
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__glXMap1fReqSize(const GLbyte * pc, Bool swap, int reqlen)
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{
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GLenum target;
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GLint order;
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target = *(GLenum *) (pc + 0);
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order = *(GLint *) (pc + 12);
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if (swap) {
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target = SWAPL(target);
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order = SWAPL(order);
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}
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if (order < 1)
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return -1;
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return safe_mul(4, safe_mul(__glMap1f_size(target), order));
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}
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static int
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Map2Size(int k, int majorOrder, int minorOrder)
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{
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if (majorOrder < 1 || minorOrder < 1)
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return -1;
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return safe_mul(k, safe_mul(majorOrder, minorOrder));
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}
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int
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__glXMap2dReqSize(const GLbyte * pc, Bool swap, int reqlen)
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{
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GLenum target;
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GLint uorder, vorder;
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target = *(GLenum *) (pc + 32);
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uorder = *(GLint *) (pc + 36);
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vorder = *(GLint *) (pc + 40);
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if (swap) {
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target = SWAPL(target);
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uorder = SWAPL(uorder);
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vorder = SWAPL(vorder);
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}
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return safe_mul(8, Map2Size(__glMap2d_size(target), uorder, vorder));
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}
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int
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__glXMap2fReqSize(const GLbyte * pc, Bool swap, int reqlen)
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{
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GLenum target;
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GLint uorder, vorder;
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target = *(GLenum *) (pc + 0);
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uorder = *(GLint *) (pc + 12);
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vorder = *(GLint *) (pc + 24);
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if (swap) {
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target = SWAPL(target);
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uorder = SWAPL(uorder);
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vorder = SWAPL(vorder);
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}
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return safe_mul(4, Map2Size(__glMap2f_size(target), uorder, vorder));
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}
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/**
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* Calculate the size of an image.
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*
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* The size of an image sent to the server from the client or sent from the
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* server to the client is calculated. The size is based on the dimensions
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* of the image, the type of pixel data, padding in the image, and the
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* alignment requirements of the image.
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*
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* \param format Format of the pixels. Same as the \c format parameter
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* to \c glTexImage1D
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* \param type Type of the pixel data. Same as the \c type parameter
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* to \c glTexImage1D
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* \param target Typically the texture target of the image. If the
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* target is one of \c GL_PROXY_*, the size returned is
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* always zero. For uses that do not have a texture target
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* (e.g, glDrawPixels), zero should be specified.
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* \param w Width of the image data. Must be >= 1.
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* \param h Height of the image data. Must be >= 1, even for 1D
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* images.
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* \param d Depth of the image data. Must be >= 1, even for 1D or
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* 2D images.
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* \param imageHeight If non-zero, defines the true height of a volumetric
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* image. This value will be used instead of \c h for
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* calculating the size of the image.
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* \param rowLength If non-zero, defines the true width of an image. This
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* value will be used instead of \c w for calculating the
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* size of the image.
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* \param skipImages Number of extra layers of image data in a volumtric
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* image that are to be skipped before the real data.
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* \param skipRows Number of extra rows of image data in an image that are
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* to be skipped before the real data.
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* \param alignment Specifies the alignment for the start of each pixel row
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* in memory. This value must be one of 1, 2, 4, or 8.
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*
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* \returns
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* The size of the image is returned. If the specified \c format and \c type
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* are invalid, -1 is returned. If \c target is one of \c GL_PROXY_*, zero
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* is returned.
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*/
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int
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__glXImageSize(GLenum format, GLenum type, GLenum target,
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GLsizei w, GLsizei h, GLsizei d,
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GLint imageHeight, GLint rowLength,
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GLint skipImages, GLint skipRows, GLint alignment)
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{
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GLint bytesPerElement, elementsPerGroup, groupsPerRow;
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GLint groupSize, rowSize, padding, imageSize;
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if (w == 0 || h == 0 || d == 0)
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return 0;
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if (w < 0 || h < 0 || d < 0 ||
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(type == GL_BITMAP &&
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(format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX))) {
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return -1;
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}
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/* proxy targets have no data */
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switch (target) {
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case GL_PROXY_TEXTURE_1D:
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case GL_PROXY_TEXTURE_2D:
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case GL_PROXY_TEXTURE_3D:
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case GL_PROXY_TEXTURE_4D_SGIS:
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case GL_PROXY_TEXTURE_CUBE_MAP:
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case GL_PROXY_TEXTURE_RECTANGLE_ARB:
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case GL_PROXY_HISTOGRAM:
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case GL_PROXY_COLOR_TABLE:
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case GL_PROXY_TEXTURE_COLOR_TABLE_SGI:
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case GL_PROXY_POST_CONVOLUTION_COLOR_TABLE:
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case GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE:
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case GL_PROXY_POST_IMAGE_TRANSFORM_COLOR_TABLE_HP:
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return 0;
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}
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/* real data has to have real sizes */
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if (imageHeight < 0 || rowLength < 0 || skipImages < 0 || skipRows < 0)
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return -1;
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if (alignment != 1 && alignment != 2 && alignment != 4 && alignment != 8)
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return -1;
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if (type == GL_BITMAP) {
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if (rowLength > 0) {
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groupsPerRow = rowLength;
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}
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else {
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groupsPerRow = w;
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}
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rowSize = bits_to_bytes(groupsPerRow);
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if (rowSize < 0)
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return -1;
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padding = (rowSize % alignment);
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if (padding) {
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rowSize += alignment - padding;
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}
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return safe_mul(safe_add(h, skipRows), rowSize);
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}
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else {
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switch (format) {
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case GL_COLOR_INDEX:
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case GL_STENCIL_INDEX:
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case GL_DEPTH_COMPONENT:
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case GL_RED:
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case GL_GREEN:
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case GL_BLUE:
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case GL_ALPHA:
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case GL_LUMINANCE:
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case GL_INTENSITY:
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case GL_RED_INTEGER_EXT:
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case GL_GREEN_INTEGER_EXT:
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case GL_BLUE_INTEGER_EXT:
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case GL_ALPHA_INTEGER_EXT:
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case GL_LUMINANCE_INTEGER_EXT:
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elementsPerGroup = 1;
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break;
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case GL_422_EXT:
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case GL_422_REV_EXT:
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case GL_422_AVERAGE_EXT:
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case GL_422_REV_AVERAGE_EXT:
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case GL_DEPTH_STENCIL_NV:
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case GL_DEPTH_STENCIL_MESA:
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case GL_YCBCR_422_APPLE:
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case GL_YCBCR_MESA:
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case GL_LUMINANCE_ALPHA:
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case GL_LUMINANCE_ALPHA_INTEGER_EXT:
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elementsPerGroup = 2;
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break;
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case GL_RGB:
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case GL_BGR:
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case GL_RGB_INTEGER_EXT:
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case GL_BGR_INTEGER_EXT:
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elementsPerGroup = 3;
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break;
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case GL_RGBA:
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case GL_BGRA:
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case GL_RGBA_INTEGER_EXT:
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case GL_BGRA_INTEGER_EXT:
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case GL_ABGR_EXT:
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elementsPerGroup = 4;
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break;
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default:
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return -1;
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}
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switch (type) {
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case GL_UNSIGNED_BYTE:
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case GL_BYTE:
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bytesPerElement = 1;
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break;
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case GL_UNSIGNED_BYTE_3_3_2:
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case GL_UNSIGNED_BYTE_2_3_3_REV:
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bytesPerElement = 1;
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elementsPerGroup = 1;
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break;
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case GL_UNSIGNED_SHORT:
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case GL_SHORT:
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bytesPerElement = 2;
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break;
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case GL_UNSIGNED_SHORT_5_6_5:
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case GL_UNSIGNED_SHORT_5_6_5_REV:
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case GL_UNSIGNED_SHORT_4_4_4_4:
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case GL_UNSIGNED_SHORT_4_4_4_4_REV:
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case GL_UNSIGNED_SHORT_5_5_5_1:
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case GL_UNSIGNED_SHORT_1_5_5_5_REV:
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case GL_UNSIGNED_SHORT_8_8_APPLE:
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case GL_UNSIGNED_SHORT_8_8_REV_APPLE:
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case GL_UNSIGNED_SHORT_15_1_MESA:
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case GL_UNSIGNED_SHORT_1_15_REV_MESA:
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bytesPerElement = 2;
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elementsPerGroup = 1;
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break;
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case GL_INT:
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case GL_UNSIGNED_INT:
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case GL_FLOAT:
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bytesPerElement = 4;
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break;
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case GL_UNSIGNED_INT_8_8_8_8:
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case GL_UNSIGNED_INT_8_8_8_8_REV:
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case GL_UNSIGNED_INT_10_10_10_2:
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case GL_UNSIGNED_INT_2_10_10_10_REV:
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case GL_UNSIGNED_INT_24_8_NV:
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case GL_UNSIGNED_INT_24_8_MESA:
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case GL_UNSIGNED_INT_8_24_REV_MESA:
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bytesPerElement = 4;
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elementsPerGroup = 1;
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break;
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default:
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return -1;
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}
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/* known safe by the switches above, not checked */
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groupSize = bytesPerElement * elementsPerGroup;
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if (rowLength > 0) {
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groupsPerRow = rowLength;
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}
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else {
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groupsPerRow = w;
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}
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if ((rowSize = safe_mul(groupsPerRow, groupSize)) < 0)
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return -1;
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padding = (rowSize % alignment);
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if (padding) {
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rowSize += alignment - padding;
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}
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if (imageHeight > 0)
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h = imageHeight;
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h = safe_add(h, skipRows);
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imageSize = safe_mul(h, rowSize);
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return safe_mul(safe_add(d, skipImages), imageSize);
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}
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}
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/* XXX this is used elsewhere - should it be exported from glxserver.h? */
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int
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__glXTypeSize(GLenum enm)
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{
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switch (enm) {
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case GL_BYTE:
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return sizeof(GLbyte);
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case GL_UNSIGNED_BYTE:
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return sizeof(GLubyte);
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case GL_SHORT:
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return sizeof(GLshort);
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case GL_UNSIGNED_SHORT:
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return sizeof(GLushort);
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case GL_INT:
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return sizeof(GLint);
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case GL_UNSIGNED_INT:
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return sizeof(GLint);
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case GL_FLOAT:
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return sizeof(GLfloat);
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case GL_DOUBLE:
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return sizeof(GLdouble);
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default:
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return -1;
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}
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}
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int
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__glXDrawArraysReqSize(const GLbyte * pc, Bool swap, int reqlen)
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{
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__GLXdispatchDrawArraysHeader *hdr = (__GLXdispatchDrawArraysHeader *) pc;
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__GLXdispatchDrawArraysComponentHeader *compHeader;
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GLint numVertexes = hdr->numVertexes;
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GLint numComponents = hdr->numComponents;
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GLint arrayElementSize = 0;
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GLint x, size;
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int i;
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if (swap) {
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numVertexes = SWAPL(numVertexes);
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numComponents = SWAPL(numComponents);
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}
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pc += sizeof(__GLXdispatchDrawArraysHeader);
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reqlen -= sizeof(__GLXdispatchDrawArraysHeader);
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size = safe_mul(sizeof(__GLXdispatchDrawArraysComponentHeader),
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numComponents);
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if (size < 0 || reqlen < 0 || reqlen < size)
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return -1;
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compHeader = (__GLXdispatchDrawArraysComponentHeader *) pc;
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for (i = 0; i < numComponents; i++) {
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GLenum datatype = compHeader[i].datatype;
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GLint numVals = compHeader[i].numVals;
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GLint component = compHeader[i].component;
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if (swap) {
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datatype = SWAPL(datatype);
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numVals = SWAPL(numVals);
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component = SWAPL(component);
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}
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switch (component) {
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case GL_VERTEX_ARRAY:
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case GL_COLOR_ARRAY:
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case GL_TEXTURE_COORD_ARRAY:
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break;
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case GL_SECONDARY_COLOR_ARRAY:
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case GL_NORMAL_ARRAY:
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if (numVals != 3) {
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/* bad size */
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return -1;
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}
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break;
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case GL_FOG_COORD_ARRAY:
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case GL_INDEX_ARRAY:
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if (numVals != 1) {
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/* bad size */
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return -1;
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}
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break;
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case GL_EDGE_FLAG_ARRAY:
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if ((numVals != 1) && (datatype != GL_UNSIGNED_BYTE)) {
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/* bad size or bad type */
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return -1;
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}
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break;
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default:
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/* unknown component type */
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return -1;
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}
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x = safe_pad(safe_mul(numVals, __glXTypeSize(datatype)));
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if ((arrayElementSize = safe_add(arrayElementSize, x)) < 0)
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return -1;
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pc += sizeof(__GLXdispatchDrawArraysComponentHeader);
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}
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return safe_add(size, safe_mul(numVertexes, arrayElementSize));
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}
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int
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__glXSeparableFilter2DReqSize(const GLbyte * pc, Bool swap, int reqlen)
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{
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__GLXdispatchConvolutionFilterHeader *hdr =
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(__GLXdispatchConvolutionFilterHeader *) pc;
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GLint image1size, image2size;
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GLenum format = hdr->format;
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GLenum type = hdr->type;
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GLint w = hdr->width;
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GLint h = hdr->height;
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GLint rowLength = hdr->rowLength;
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GLint alignment = hdr->alignment;
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if (swap) {
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format = SWAPL(format);
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type = SWAPL(type);
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w = SWAPL(w);
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h = SWAPL(h);
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rowLength = SWAPL(rowLength);
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alignment = SWAPL(alignment);
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}
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/* XXX Should rowLength be used for either or both image? */
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image1size = __glXImageSize(format, type, 0, w, 1, 1,
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0, rowLength, 0, 0, alignment);
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image2size = __glXImageSize(format, type, 0, h, 1, 1,
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0, rowLength, 0, 0, alignment);
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return safe_add(safe_pad(image1size), image2size);
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}
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