From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001 From: Reinhard Tartler Date: Mon, 10 Oct 2011 17:43:39 +0200 Subject: Imported nx-X11-3.1.0-1.tar.gz Summary: Imported nx-X11-3.1.0-1.tar.gz Keywords: Imported nx-X11-3.1.0-1.tar.gz into Git repository --- nx-X11/extras/Mesa/src/mesa/main/api_validate.c | 238 ++++++++++++++++++++++++ 1 file changed, 238 insertions(+) create mode 100644 nx-X11/extras/Mesa/src/mesa/main/api_validate.c (limited to 'nx-X11/extras/Mesa/src/mesa/main/api_validate.c') diff --git a/nx-X11/extras/Mesa/src/mesa/main/api_validate.c b/nx-X11/extras/Mesa/src/mesa/main/api_validate.c new file mode 100644 index 000000000..d1c8f42e7 --- /dev/null +++ b/nx-X11/extras/Mesa/src/mesa/main/api_validate.c @@ -0,0 +1,238 @@ +/* + * Mesa 3-D graphics library + * Version: 6.1 + * + * Copyright (C) 1999-2003 Brian Paul 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 + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL 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. + */ + +#include "glheader.h" +#include "api_validate.h" +#include "context.h" +#include "imports.h" +#include "mtypes.h" +#include "state.h" + + +GLboolean +_mesa_validate_DrawElements(GLcontext *ctx, + GLenum mode, GLsizei count, GLenum type, + const GLvoid *indices) +{ + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); + + if (count <= 0) { + if (count < 0) + _mesa_error(ctx, GL_INVALID_VALUE, "glDrawElements(count)" ); + return GL_FALSE; + } + + if (mode > GL_POLYGON) { + _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(mode)" ); + return GL_FALSE; + } + + if (type != GL_UNSIGNED_INT && + type != GL_UNSIGNED_BYTE && + type != GL_UNSIGNED_SHORT) + { + _mesa_error(ctx, GL_INVALID_ENUM, "glDrawElements(type)" ); + return GL_FALSE; + } + + if (ctx->NewState) + _mesa_update_state(ctx); + + /* Always need vertex positions */ + if (!ctx->Array.Vertex.Enabled + && !(ctx->VertexProgram._Enabled && ctx->Array.VertexAttrib[0].Enabled)) + return GL_FALSE; + + /* Vertex buffer object tests */ + if (ctx->Array.ElementArrayBufferObj->Name) { + GLuint indexBytes; + + /* use indices in the buffer object */ + if (!ctx->Array.ElementArrayBufferObj->Data) { + _mesa_warning(ctx, "DrawElements with empty vertex elements buffer!"); + return GL_FALSE; + } + + /* make sure count doesn't go outside buffer bounds */ + if (type == GL_UNSIGNED_INT) { + indexBytes = count * sizeof(GLuint); + } + else if (type == GL_UNSIGNED_BYTE) { + indexBytes = count * sizeof(GLubyte); + } + else { + ASSERT(type == GL_UNSIGNED_SHORT); + indexBytes = count * sizeof(GLushort); + } + + if ((GLubyte *) indices + indexBytes > + ctx->Array.ElementArrayBufferObj->Data + + ctx->Array.ElementArrayBufferObj->Size) { + _mesa_warning(ctx, "glDrawElements index out of buffer bounds"); + return GL_FALSE; + } + + /* Actual address is the sum of pointers. Indices may be used below. */ + if (ctx->Const.CheckArrayBounds) { + indices = (const GLvoid *) + ADD_POINTERS(ctx->Array.ElementArrayBufferObj->Data, + (const GLubyte *) indices); + } + } + + if (ctx->Const.CheckArrayBounds) { + /* find max array index */ + GLuint max = 0; + GLint i; + if (type == GL_UNSIGNED_INT) { + for (i = 0; i < count; i++) + if (((GLuint *) indices)[i] > max) + max = ((GLuint *) indices)[i]; + } + else if (type == GL_UNSIGNED_SHORT) { + for (i = 0; i < count; i++) + if (((GLushort *) indices)[i] > max) + max = ((GLushort *) indices)[i]; + } + else { + ASSERT(type == GL_UNSIGNED_BYTE); + for (i = 0; i < count; i++) + if (((GLubyte *) indices)[i] > max) + max = ((GLubyte *) indices)[i]; + } + if (max >= ctx->Array._MaxElement) { + /* the max element is out of bounds of one or more enabled arrays */ + return GL_FALSE; + } + } + + return GL_TRUE; +} + + +GLboolean +_mesa_validate_DrawRangeElements(GLcontext *ctx, GLenum mode, + GLuint start, GLuint end, + GLsizei count, GLenum type, + const GLvoid *indices) +{ + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); + + if (count <= 0) { + if (count < 0) + _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(count)" ); + return GL_FALSE; + } + + if (mode > GL_POLYGON) { + _mesa_error(ctx, GL_INVALID_ENUM, "glDrawRangeElements(mode)" ); + return GL_FALSE; + } + + if (end < start) { + _mesa_error(ctx, GL_INVALID_VALUE, "glDrawRangeElements(endNewState) + _mesa_update_state(ctx); + + /* Always need vertex positions */ + if (!ctx->Array.Vertex.Enabled + && !(ctx->VertexProgram._Enabled && ctx->Array.VertexAttrib[0].Enabled)) + return GL_FALSE; + + if (ctx->Const.CheckArrayBounds) { + /* Find max array index. + * We don't trust the user's start and end values. + */ + GLuint max = 0; + GLint i; + if (type == GL_UNSIGNED_INT) { + for (i = 0; i < count; i++) + if (((GLuint *) indices)[i] > max) + max = ((GLuint *) indices)[i]; + } + else if (type == GL_UNSIGNED_SHORT) { + for (i = 0; i < count; i++) + if (((GLushort *) indices)[i] > max) + max = ((GLushort *) indices)[i]; + } + else { + ASSERT(type == GL_UNSIGNED_BYTE); + for (i = 0; i < count; i++) + if (((GLubyte *) indices)[i] > max) + max = ((GLubyte *) indices)[i]; + } + if (max >= ctx->Array._MaxElement) { + /* the max element is out of bounds of one or more enabled arrays */ + return GL_FALSE; + } + } + + return GL_TRUE; +} + + +/** + * Called from the tnl module to error check the function parameters and + * verify that we really can draw something. + */ +GLboolean +_mesa_validate_DrawArrays(GLcontext *ctx, + GLenum mode, GLint start, GLsizei count) +{ + ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE); + + if (count < 0) { + _mesa_error(ctx, GL_INVALID_VALUE, "glDrawArrays(count)" ); + return GL_FALSE; + } + + if (mode > GL_POLYGON) { + _mesa_error(ctx, GL_INVALID_ENUM, "glDrawArrays(mode)" ); + return GL_FALSE; + } + + if (ctx->NewState) + _mesa_update_state(ctx); + + /* Always need vertex positions */ + if (!ctx->Array.Vertex.Enabled && !ctx->Array.VertexAttrib[0].Enabled) + return GL_FALSE; + + if (ctx->Const.CheckArrayBounds) { + if (start + count > (GLint) ctx->Array._MaxElement) + return GL_FALSE; + } + + return GL_TRUE; +} -- cgit v1.2.3