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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5563 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * |
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| 4 | * Copyright (C) 1999-2006 Brian Paul All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the "Software"), |
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| 8 | * to deal in the Software without restriction, including without limitation |
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| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 11 | * Software is furnished to do so, subject to the following conditions: |
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| 12 | * |
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| 13 | * The above copyright notice and this permission notice shall be included |
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| 14 | * in all copies or substantial portions of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 17 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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| 20 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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| 21 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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| 22 | * OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | */ |
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| 24 | |||
| 25 | |||
| 26 | #include "glheader.h" |
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| 27 | #include "context.h" |
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| 28 | #include "lines.h" |
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| 29 | #include "macros.h" |
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| 30 | #include "mtypes.h" |
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| 31 | |||
| 32 | |||
| 33 | /** |
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| 34 | * Set the line width. |
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| 35 | * |
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| 36 | * \param width line width in pixels. |
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| 37 | * |
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| 38 | * \sa glLineWidth(). |
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| 39 | */ |
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| 40 | void GLAPIENTRY |
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| 41 | _mesa_LineWidth( GLfloat width ) |
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| 42 | { |
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| 43 | GET_CURRENT_CONTEXT(ctx); |
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| 44 | |||
| 45 | if (MESA_VERBOSE & VERBOSE_API) |
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| 46 | _mesa_debug(ctx, "glLineWidth %f\n", width); |
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| 47 | |||
| 48 | if (width<=0.0) { |
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| 49 | _mesa_error( ctx, GL_INVALID_VALUE, "glLineWidth" ); |
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| 50 | return; |
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| 51 | } |
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| 52 | |||
| 53 | /* Page 407 (page 423 of the PDF) of the OpenGL 3.0 spec says (in the list |
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| 54 | * of deprecated functionality): |
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| 55 | * |
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| 56 | * "Wide lines and line stipple - LineWidth is not deprecated, but |
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| 57 | * values greater than 1.0 will generate an INVALID_VALUE error;" |
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| 58 | * |
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| 59 | * This is one of the very few cases where functionality was deprecated but |
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| 60 | * *NOT* removed in a later spec. Therefore, we only disallow this in a |
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| 61 | * forward compatible context. |
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| 62 | */ |
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| 63 | if (ctx->API == API_OPENGL_CORE |
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| 64 | && ((ctx->Const.ContextFlags & GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT) |
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| 65 | != 0)) { |
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| 66 | _mesa_error( ctx, GL_INVALID_VALUE, "glLineWidth" ); |
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| 67 | return; |
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| 68 | } |
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| 69 | |||
| 70 | if (ctx->Line.Width == width) |
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| 71 | return; |
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| 72 | |||
| 73 | FLUSH_VERTICES(ctx, _NEW_LINE); |
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| 74 | ctx->Line.Width = width; |
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| 75 | |||
| 76 | if (ctx->Driver.LineWidth) |
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| 77 | ctx->Driver.LineWidth(ctx, width); |
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| 78 | } |
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| 79 | |||
| 80 | |||
| 81 | /** |
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| 82 | * Set the line stipple pattern. |
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| 83 | * |
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| 84 | * \param factor pattern scale factor. |
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| 85 | * \param pattern bit pattern. |
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| 86 | * |
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| 87 | * \sa glLineStipple(). |
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| 88 | * |
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| 89 | * Updates gl_line_attrib::StippleFactor and gl_line_attrib::StipplePattern. On |
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| 90 | * change flushes the vertices and notifies the driver via |
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| 91 | * the dd_function_table::LineStipple callback. |
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| 92 | */ |
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| 93 | void GLAPIENTRY |
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| 94 | _mesa_LineStipple( GLint factor, GLushort pattern ) |
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| 95 | { |
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| 96 | GET_CURRENT_CONTEXT(ctx); |
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| 97 | |||
| 98 | if (MESA_VERBOSE & VERBOSE_API) |
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| 99 | _mesa_debug(ctx, "glLineStipple %d %u\n", factor, pattern); |
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| 100 | |||
| 101 | factor = CLAMP( factor, 1, 256 ); |
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| 102 | |||
| 103 | if (ctx->Line.StippleFactor == factor && |
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| 104 | ctx->Line.StipplePattern == pattern) |
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| 105 | return; |
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| 106 | |||
| 107 | FLUSH_VERTICES(ctx, _NEW_LINE); |
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| 108 | ctx->Line.StippleFactor = factor; |
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| 109 | ctx->Line.StipplePattern = pattern; |
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| 110 | |||
| 111 | if (ctx->Driver.LineStipple) |
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| 112 | ctx->Driver.LineStipple( ctx, factor, pattern ); |
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| 113 | } |
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| 114 | |||
| 115 | |||
| 116 | /** |
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| 117 | * Initialize the context line state. |
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| 118 | * |
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| 119 | * \param ctx GL context. |
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| 120 | * |
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| 121 | * Initializes __struct gl_contextRec::Line and line related constants in |
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| 122 | * __struct gl_contextRec::Const. |
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| 123 | */ |
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| 124 | void GLAPIENTRY |
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| 125 | _mesa_init_line( struct gl_context * ctx ) |
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| 126 | { |
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| 127 | ctx->Line.SmoothFlag = GL_FALSE; |
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| 128 | ctx->Line.StippleFlag = GL_FALSE; |
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| 129 | ctx->Line.Width = 1.0; |
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| 130 | ctx->Line.StipplePattern = 0xffff; |
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| 131 | ctx->Line.StippleFactor = 1; |
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| 132 | } |