| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 1999-2006 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 |
| * THE AUTHORS OR COPYRIGHT HOLDERS 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 "context.h" |
| #include "lines.h" |
| #include "macros.h" |
| #include "mtypes.h" |
| |
| |
| /** |
| * Set the line width. |
| * |
| * \param width line width in pixels. |
| * |
| * \sa glLineWidth(). |
| */ |
| void GLAPIENTRY |
| _mesa_LineWidth( GLfloat width ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| if (MESA_VERBOSE & VERBOSE_API) |
| _mesa_debug(ctx, "glLineWidth %f\n", width); |
| |
| /* If width is unchanged, there can't be an error */ |
| if (ctx->Line.Width == width) |
| return; |
| |
| if (width <= 0.0F) { |
| _mesa_error( ctx, GL_INVALID_VALUE, "glLineWidth" ); |
| return; |
| } |
| |
| /* Page 407 (page 423 of the PDF) of the OpenGL 3.0 spec says (in the list |
| * of deprecated functionality): |
| * |
| * "Wide lines and line stipple - LineWidth is not deprecated, but |
| * values greater than 1.0 will generate an INVALID_VALUE error;" |
| * |
| * This is one of the very few cases where functionality was deprecated but |
| * *NOT* removed in a later spec. Therefore, we only disallow this in a |
| * forward compatible context. |
| */ |
| if (ctx->API == API_OPENGL_CORE |
| && ((ctx->Const.ContextFlags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT) |
| != 0) |
| && width > 1.0F) { |
| _mesa_error( ctx, GL_INVALID_VALUE, "glLineWidth" ); |
| return; |
| } |
| |
| FLUSH_VERTICES(ctx, _NEW_LINE); |
| ctx->Line.Width = width; |
| |
| if (ctx->Driver.LineWidth) |
| ctx->Driver.LineWidth(ctx, width); |
| } |
| |
| |
| /** |
| * Set the line stipple pattern. |
| * |
| * \param factor pattern scale factor. |
| * \param pattern bit pattern. |
| * |
| * \sa glLineStipple(). |
| * |
| * Updates gl_line_attrib::StippleFactor and gl_line_attrib::StipplePattern. On |
| * change flushes the vertices and notifies the driver via |
| * the dd_function_table::LineStipple callback. |
| */ |
| void GLAPIENTRY |
| _mesa_LineStipple( GLint factor, GLushort pattern ) |
| { |
| GET_CURRENT_CONTEXT(ctx); |
| |
| if (MESA_VERBOSE & VERBOSE_API) |
| _mesa_debug(ctx, "glLineStipple %d %u\n", factor, pattern); |
| |
| factor = CLAMP( factor, 1, 256 ); |
| |
| if (ctx->Line.StippleFactor == factor && |
| ctx->Line.StipplePattern == pattern) |
| return; |
| |
| FLUSH_VERTICES(ctx, _NEW_LINE); |
| ctx->Line.StippleFactor = factor; |
| ctx->Line.StipplePattern = pattern; |
| |
| if (ctx->Driver.LineStipple) |
| ctx->Driver.LineStipple( ctx, factor, pattern ); |
| } |
| |
| |
| /** |
| * Initialize the context line state. |
| * |
| * \param ctx GL context. |
| * |
| * Initializes __struct gl_contextRec::Line and line related constants in |
| * __struct gl_contextRec::Const. |
| */ |
| void GLAPIENTRY |
| _mesa_init_line( struct gl_context * ctx ) |
| { |
| ctx->Line.SmoothFlag = GL_FALSE; |
| ctx->Line.StippleFlag = GL_FALSE; |
| ctx->Line.Width = 1.0; |
| ctx->Line.StipplePattern = 0xffff; |
| ctx->Line.StippleFactor = 1; |
| } |