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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 55 | pj | 1 | /* $Id: pixel.c,v 1.1 2003-02-28 11:42:04 pj Exp $ */ |
| 2 | |||
| 3 | /* |
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| 4 | * Mesa 3-D graphics library |
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| 5 | * Version: 4.1 |
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| 6 | * |
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| 7 | * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. |
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| 8 | * |
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| 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 10 | * copy of this software and associated documentation files (the "Software"), |
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| 11 | * to deal in the Software without restriction, including without limitation |
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| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 14 | * Software is furnished to do so, subject to the following conditions: |
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| 15 | * |
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| 16 | * The above copyright notice and this permission notice shall be included |
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| 17 | * in all copies or substantial portions of the Software. |
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| 18 | * |
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| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 25 | */ |
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| 26 | |||
| 27 | #include "glheader.h" |
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| 28 | #include "imports.h" |
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| 29 | #include "colormac.h" |
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| 30 | #include "context.h" |
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| 31 | #include "macros.h" |
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| 32 | #include "pixel.h" |
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| 33 | #include "mtypes.h" |
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| 34 | |||
| 35 | |||
| 36 | /**********************************************************************/ |
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| 37 | /***** glPixelZoom *****/ |
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| 38 | /**********************************************************************/ |
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| 39 | |||
| 40 | |||
| 41 | |||
| 42 | void |
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| 43 | _mesa_PixelZoom( GLfloat xfactor, GLfloat yfactor ) |
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| 44 | { |
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| 45 | GET_CURRENT_CONTEXT(ctx); |
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| 46 | |||
| 47 | if (ctx->Pixel.ZoomX == xfactor && |
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| 48 | ctx->Pixel.ZoomY == yfactor) |
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| 49 | return; |
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| 50 | |||
| 51 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
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| 52 | ctx->Pixel.ZoomX = xfactor; |
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| 53 | ctx->Pixel.ZoomY = yfactor; |
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| 54 | } |
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| 55 | |||
| 56 | |||
| 57 | |||
| 58 | /**********************************************************************/ |
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| 59 | /***** glPixelStore *****/ |
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| 60 | /**********************************************************************/ |
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| 61 | |||
| 62 | |||
| 63 | void |
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| 64 | _mesa_PixelStorei( GLenum pname, GLint param ) |
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| 65 | { |
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| 66 | /* NOTE: this call can't be compiled into the display list */ |
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| 67 | GET_CURRENT_CONTEXT(ctx); |
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| 68 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 69 | |||
| 70 | switch (pname) { |
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| 71 | case GL_PACK_SWAP_BYTES: |
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| 72 | if (param == (GLint)ctx->Pack.SwapBytes) |
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| 73 | return; |
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| 74 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 75 | ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE; |
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| 76 | break; |
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| 77 | case GL_PACK_LSB_FIRST: |
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| 78 | if (param == (GLint)ctx->Pack.LsbFirst) |
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| 79 | return; |
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| 80 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 81 | ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE; |
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| 82 | break; |
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| 83 | case GL_PACK_ROW_LENGTH: |
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| 84 | if (param<0) { |
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| 85 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 86 | return; |
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| 87 | } |
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| 88 | if (ctx->Pack.RowLength == param) |
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| 89 | return; |
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| 90 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 91 | ctx->Pack.RowLength = param; |
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| 92 | break; |
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| 93 | case GL_PACK_IMAGE_HEIGHT: |
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| 94 | if (param<0) { |
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| 95 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 96 | return; |
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| 97 | } |
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| 98 | if (ctx->Pack.ImageHeight == param) |
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| 99 | return; |
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| 100 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 101 | ctx->Pack.ImageHeight = param; |
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| 102 | break; |
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| 103 | case GL_PACK_SKIP_PIXELS: |
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| 104 | if (param<0) { |
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| 105 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 106 | return; |
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| 107 | } |
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| 108 | if (ctx->Pack.SkipPixels == param) |
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| 109 | return; |
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| 110 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 111 | ctx->Pack.SkipPixels = param; |
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| 112 | break; |
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| 113 | case GL_PACK_SKIP_ROWS: |
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| 114 | if (param<0) { |
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| 115 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 116 | return; |
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| 117 | } |
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| 118 | if (ctx->Pack.SkipRows == param) |
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| 119 | return; |
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| 120 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 121 | ctx->Pack.SkipRows = param; |
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| 122 | break; |
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| 123 | case GL_PACK_SKIP_IMAGES: |
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| 124 | if (param<0) { |
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| 125 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 126 | return; |
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| 127 | } |
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| 128 | if (ctx->Pack.SkipImages == param) |
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| 129 | return; |
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| 130 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 131 | ctx->Pack.SkipImages = param; |
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| 132 | break; |
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| 133 | case GL_PACK_ALIGNMENT: |
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| 134 | if (param!=1 && param!=2 && param!=4 && param!=8) { |
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| 135 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 136 | return; |
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| 137 | } |
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| 138 | if (ctx->Pack.Alignment == param) |
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| 139 | return; |
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| 140 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 141 | ctx->Pack.Alignment = param; |
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| 142 | break; |
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| 143 | case GL_PACK_INVERT_MESA: |
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| 144 | if (!ctx->Extensions.MESA_pack_invert) { |
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| 145 | _mesa_error( ctx, GL_INVALID_ENUM, "glPixelstore(pname)" ); |
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| 146 | return; |
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| 147 | } |
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| 148 | if (ctx->Pack.Invert == param) |
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| 149 | return; |
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| 150 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 151 | ctx->Pack.Invert = param; |
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| 152 | break; |
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| 153 | |||
| 154 | case GL_UNPACK_SWAP_BYTES: |
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| 155 | if (param == (GLint)ctx->Unpack.SwapBytes) |
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| 156 | return; |
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| 157 | if ((GLint)ctx->Unpack.SwapBytes == param) |
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| 158 | return; |
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| 159 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 160 | ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE; |
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| 161 | break; |
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| 162 | case GL_UNPACK_LSB_FIRST: |
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| 163 | if (param == (GLint)ctx->Unpack.LsbFirst) |
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| 164 | return; |
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| 165 | if ((GLint)ctx->Unpack.LsbFirst == param) |
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| 166 | return; |
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| 167 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 168 | ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE; |
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| 169 | break; |
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| 170 | case GL_UNPACK_ROW_LENGTH: |
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| 171 | if (param<0) { |
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| 172 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 173 | return; |
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| 174 | } |
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| 175 | if (ctx->Unpack.RowLength == param) |
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| 176 | return; |
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| 177 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 178 | ctx->Unpack.RowLength = param; |
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| 179 | break; |
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| 180 | case GL_UNPACK_IMAGE_HEIGHT: |
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| 181 | if (param<0) { |
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| 182 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 183 | return; |
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| 184 | } |
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| 185 | if (ctx->Unpack.ImageHeight == param) |
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| 186 | return; |
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| 187 | |||
| 188 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 189 | ctx->Unpack.ImageHeight = param; |
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| 190 | break; |
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| 191 | case GL_UNPACK_SKIP_PIXELS: |
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| 192 | if (param<0) { |
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| 193 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 194 | return; |
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| 195 | } |
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| 196 | if (ctx->Unpack.SkipPixels == param) |
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| 197 | return; |
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| 198 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 199 | ctx->Unpack.SkipPixels = param; |
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| 200 | break; |
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| 201 | case GL_UNPACK_SKIP_ROWS: |
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| 202 | if (param<0) { |
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| 203 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 204 | return; |
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| 205 | } |
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| 206 | if (ctx->Unpack.SkipRows == param) |
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| 207 | return; |
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| 208 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 209 | ctx->Unpack.SkipRows = param; |
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| 210 | break; |
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| 211 | case GL_UNPACK_SKIP_IMAGES: |
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| 212 | if (param < 0) { |
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| 213 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 214 | return; |
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| 215 | } |
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| 216 | if (ctx->Unpack.SkipImages == param) |
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| 217 | return; |
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| 218 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 219 | ctx->Unpack.SkipImages = param; |
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| 220 | break; |
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| 221 | case GL_UNPACK_ALIGNMENT: |
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| 222 | if (param!=1 && param!=2 && param!=4 && param!=8) { |
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| 223 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore" ); |
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| 224 | return; |
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| 225 | } |
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| 226 | if (ctx->Unpack.Alignment == param) |
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| 227 | return; |
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| 228 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 229 | ctx->Unpack.Alignment = param; |
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| 230 | break; |
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| 231 | case GL_UNPACK_CLIENT_STORAGE_APPLE: |
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| 232 | if (param == (GLint)ctx->Unpack.ClientStorage) |
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| 233 | return; |
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| 234 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 235 | ctx->Unpack.ClientStorage = param ? GL_TRUE : GL_FALSE; |
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| 236 | break; |
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| 237 | default: |
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| 238 | _mesa_error( ctx, GL_INVALID_ENUM, "glPixelStore" ); |
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| 239 | return; |
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| 240 | } |
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| 241 | } |
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| 242 | |||
| 243 | |||
| 244 | void |
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| 245 | _mesa_PixelStoref( GLenum pname, GLfloat param ) |
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| 246 | { |
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| 247 | _mesa_PixelStorei( pname, (GLint) param ); |
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| 248 | } |
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| 249 | |||
| 250 | |||
| 251 | |||
| 252 | /**********************************************************************/ |
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| 253 | /***** glPixelMap *****/ |
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| 254 | /**********************************************************************/ |
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| 255 | |||
| 256 | |||
| 257 | |||
| 258 | void |
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| 259 | _mesa_PixelMapfv( GLenum map, GLint mapsize, const GLfloat *values ) |
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| 260 | { |
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| 261 | GLint i; |
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| 262 | GET_CURRENT_CONTEXT(ctx); |
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| 263 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 264 | |||
| 265 | if (mapsize < 1 || mapsize > MAX_PIXEL_MAP_TABLE) { |
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| 266 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" ); |
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| 267 | return; |
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| 268 | } |
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| 269 | |||
| 270 | if (map >= GL_PIXEL_MAP_S_TO_S && map <= GL_PIXEL_MAP_I_TO_A) { |
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| 271 | /* test that mapsize is a power of two */ |
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| 272 | if (_mesa_bitcount((GLuint) mapsize) != 1) { |
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| 273 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelMapfv(mapsize)" ); |
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| 274 | return; |
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| 275 | } |
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| 276 | } |
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| 277 | |||
| 278 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
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| 279 | |||
| 280 | switch (map) { |
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| 281 | case GL_PIXEL_MAP_S_TO_S: |
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| 282 | ctx->Pixel.MapStoSsize = mapsize; |
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| 283 | for (i=0;i<mapsize;i++) { |
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| 284 | ctx->Pixel.MapStoS[i] = (GLint) values[i]; |
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| 285 | } |
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| 286 | break; |
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| 287 | case GL_PIXEL_MAP_I_TO_I: |
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| 288 | ctx->Pixel.MapItoIsize = mapsize; |
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| 289 | for (i=0;i<mapsize;i++) { |
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| 290 | ctx->Pixel.MapItoI[i] = (GLint) values[i]; |
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| 291 | } |
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| 292 | break; |
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| 293 | case GL_PIXEL_MAP_I_TO_R: |
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| 294 | ctx->Pixel.MapItoRsize = mapsize; |
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| 295 | for (i=0;i<mapsize;i++) { |
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| 296 | GLfloat val = CLAMP( values[i], 0.0F, 1.0F ); |
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| 297 | ctx->Pixel.MapItoR[i] = val; |
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| 298 | ctx->Pixel.MapItoR8[i] = (GLint) (val * 255.0F); |
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| 299 | } |
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| 300 | break; |
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| 301 | case GL_PIXEL_MAP_I_TO_G: |
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| 302 | ctx->Pixel.MapItoGsize = mapsize; |
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| 303 | for (i=0;i<mapsize;i++) { |
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| 304 | GLfloat val = CLAMP( values[i], 0.0F, 1.0F ); |
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| 305 | ctx->Pixel.MapItoG[i] = val; |
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| 306 | ctx->Pixel.MapItoG8[i] = (GLint) (val * 255.0F); |
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| 307 | } |
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| 308 | break; |
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| 309 | case GL_PIXEL_MAP_I_TO_B: |
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| 310 | ctx->Pixel.MapItoBsize = mapsize; |
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| 311 | for (i=0;i<mapsize;i++) { |
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| 312 | GLfloat val = CLAMP( values[i], 0.0F, 1.0F ); |
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| 313 | ctx->Pixel.MapItoB[i] = val; |
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| 314 | ctx->Pixel.MapItoB8[i] = (GLint) (val * 255.0F); |
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| 315 | } |
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| 316 | break; |
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| 317 | case GL_PIXEL_MAP_I_TO_A: |
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| 318 | ctx->Pixel.MapItoAsize = mapsize; |
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| 319 | for (i=0;i<mapsize;i++) { |
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| 320 | GLfloat val = CLAMP( values[i], 0.0F, 1.0F ); |
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| 321 | ctx->Pixel.MapItoA[i] = val; |
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| 322 | ctx->Pixel.MapItoA8[i] = (GLint) (val * 255.0F); |
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| 323 | } |
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| 324 | break; |
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| 325 | case GL_PIXEL_MAP_R_TO_R: |
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| 326 | ctx->Pixel.MapRtoRsize = mapsize; |
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| 327 | for (i=0;i<mapsize;i++) { |
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| 328 | ctx->Pixel.MapRtoR[i] = CLAMP( values[i], 0.0F, 1.0F ); |
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| 329 | } |
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| 330 | break; |
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| 331 | case GL_PIXEL_MAP_G_TO_G: |
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| 332 | ctx->Pixel.MapGtoGsize = mapsize; |
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| 333 | for (i=0;i<mapsize;i++) { |
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| 334 | ctx->Pixel.MapGtoG[i] = CLAMP( values[i], 0.0F, 1.0F ); |
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| 335 | } |
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| 336 | break; |
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| 337 | case GL_PIXEL_MAP_B_TO_B: |
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| 338 | ctx->Pixel.MapBtoBsize = mapsize; |
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| 339 | for (i=0;i<mapsize;i++) { |
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| 340 | ctx->Pixel.MapBtoB[i] = CLAMP( values[i], 0.0F, 1.0F ); |
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| 341 | } |
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| 342 | break; |
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| 343 | case GL_PIXEL_MAP_A_TO_A: |
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| 344 | ctx->Pixel.MapAtoAsize = mapsize; |
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| 345 | for (i=0;i<mapsize;i++) { |
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| 346 | ctx->Pixel.MapAtoA[i] = CLAMP( values[i], 0.0F, 1.0F ); |
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| 347 | } |
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| 348 | break; |
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| 349 | default: |
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| 350 | _mesa_error( ctx, GL_INVALID_ENUM, "glPixelMapfv(map)" ); |
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| 351 | } |
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| 352 | } |
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| 353 | |||
| 354 | |||
| 355 | |||
| 356 | void |
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| 357 | _mesa_PixelMapuiv(GLenum map, GLint mapsize, const GLuint *values ) |
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| 358 | { |
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| 359 | const GLint n = MIN2(mapsize, MAX_PIXEL_MAP_TABLE); |
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| 360 | GLfloat fvalues[MAX_PIXEL_MAP_TABLE]; |
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| 361 | GLint i; |
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| 362 | if (map==GL_PIXEL_MAP_I_TO_I || map==GL_PIXEL_MAP_S_TO_S) { |
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| 363 | for (i=0;i<n;i++) { |
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| 364 | fvalues[i] = (GLfloat) values[i]; |
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| 365 | } |
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| 366 | } |
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| 367 | else { |
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| 368 | for (i=0;i<n;i++) { |
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| 369 | fvalues[i] = UINT_TO_FLOAT( values[i] ); |
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| 370 | } |
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| 371 | } |
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| 372 | _mesa_PixelMapfv(map, mapsize, fvalues); |
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| 373 | } |
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| 374 | |||
| 375 | |||
| 376 | |||
| 377 | void |
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| 378 | _mesa_PixelMapusv(GLenum map, GLint mapsize, const GLushort *values ) |
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| 379 | { |
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| 380 | const GLint n = MIN2(mapsize, MAX_PIXEL_MAP_TABLE); |
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| 381 | GLfloat fvalues[MAX_PIXEL_MAP_TABLE]; |
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| 382 | GLint i; |
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| 383 | if (map==GL_PIXEL_MAP_I_TO_I || map==GL_PIXEL_MAP_S_TO_S) { |
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| 384 | for (i=0;i<n;i++) { |
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| 385 | fvalues[i] = (GLfloat) values[i]; |
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| 386 | } |
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| 387 | } |
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| 388 | else { |
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| 389 | for (i=0;i<n;i++) { |
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| 390 | fvalues[i] = USHORT_TO_FLOAT( values[i] ); |
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| 391 | } |
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| 392 | } |
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| 393 | _mesa_PixelMapfv(map, mapsize, fvalues); |
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| 394 | } |
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| 395 | |||
| 396 | |||
| 397 | |||
| 398 | void |
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| 399 | _mesa_GetPixelMapfv( GLenum map, GLfloat *values ) |
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| 400 | { |
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| 401 | GET_CURRENT_CONTEXT(ctx); |
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| 402 | GLint i; |
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| 403 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 404 | |||
| 405 | switch (map) { |
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| 406 | case GL_PIXEL_MAP_I_TO_I: |
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| 407 | for (i=0;i<ctx->Pixel.MapItoIsize;i++) { |
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| 408 | values[i] = (GLfloat) ctx->Pixel.MapItoI[i]; |
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| 409 | } |
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| 410 | break; |
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| 411 | case GL_PIXEL_MAP_S_TO_S: |
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| 412 | for (i=0;i<ctx->Pixel.MapStoSsize;i++) { |
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| 413 | values[i] = (GLfloat) ctx->Pixel.MapStoS[i]; |
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| 414 | } |
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| 415 | break; |
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| 416 | case GL_PIXEL_MAP_I_TO_R: |
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| 417 | MEMCPY(values,ctx->Pixel.MapItoR,ctx->Pixel.MapItoRsize*sizeof(GLfloat)); |
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| 418 | break; |
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| 419 | case GL_PIXEL_MAP_I_TO_G: |
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| 420 | MEMCPY(values,ctx->Pixel.MapItoG,ctx->Pixel.MapItoGsize*sizeof(GLfloat)); |
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| 421 | break; |
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| 422 | case GL_PIXEL_MAP_I_TO_B: |
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| 423 | MEMCPY(values,ctx->Pixel.MapItoB,ctx->Pixel.MapItoBsize*sizeof(GLfloat)); |
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| 424 | break; |
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| 425 | case GL_PIXEL_MAP_I_TO_A: |
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| 426 | MEMCPY(values,ctx->Pixel.MapItoA,ctx->Pixel.MapItoAsize*sizeof(GLfloat)); |
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| 427 | break; |
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| 428 | case GL_PIXEL_MAP_R_TO_R: |
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| 429 | MEMCPY(values,ctx->Pixel.MapRtoR,ctx->Pixel.MapRtoRsize*sizeof(GLfloat)); |
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| 430 | break; |
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| 431 | case GL_PIXEL_MAP_G_TO_G: |
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| 432 | MEMCPY(values,ctx->Pixel.MapGtoG,ctx->Pixel.MapGtoGsize*sizeof(GLfloat)); |
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| 433 | break; |
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| 434 | case GL_PIXEL_MAP_B_TO_B: |
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| 435 | MEMCPY(values,ctx->Pixel.MapBtoB,ctx->Pixel.MapBtoBsize*sizeof(GLfloat)); |
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| 436 | break; |
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| 437 | case GL_PIXEL_MAP_A_TO_A: |
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| 438 | MEMCPY(values,ctx->Pixel.MapAtoA,ctx->Pixel.MapAtoAsize*sizeof(GLfloat)); |
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| 439 | break; |
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| 440 | default: |
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| 441 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" ); |
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| 442 | } |
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| 443 | } |
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| 444 | |||
| 445 | |||
| 446 | void |
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| 447 | _mesa_GetPixelMapuiv( GLenum map, GLuint *values ) |
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| 448 | { |
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| 449 | GET_CURRENT_CONTEXT(ctx); |
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| 450 | GLint i; |
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| 451 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 452 | |||
| 453 | switch (map) { |
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| 454 | case GL_PIXEL_MAP_I_TO_I: |
||
| 455 | MEMCPY(values, ctx->Pixel.MapItoI, ctx->Pixel.MapItoIsize*sizeof(GLint)); |
||
| 456 | break; |
||
| 457 | case GL_PIXEL_MAP_S_TO_S: |
||
| 458 | MEMCPY(values, ctx->Pixel.MapStoS, ctx->Pixel.MapStoSsize*sizeof(GLint)); |
||
| 459 | break; |
||
| 460 | case GL_PIXEL_MAP_I_TO_R: |
||
| 461 | for (i=0;i<ctx->Pixel.MapItoRsize;i++) { |
||
| 462 | values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoR[i] ); |
||
| 463 | } |
||
| 464 | break; |
||
| 465 | case GL_PIXEL_MAP_I_TO_G: |
||
| 466 | for (i=0;i<ctx->Pixel.MapItoGsize;i++) { |
||
| 467 | values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoG[i] ); |
||
| 468 | } |
||
| 469 | break; |
||
| 470 | case GL_PIXEL_MAP_I_TO_B: |
||
| 471 | for (i=0;i<ctx->Pixel.MapItoBsize;i++) { |
||
| 472 | values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoB[i] ); |
||
| 473 | } |
||
| 474 | break; |
||
| 475 | case GL_PIXEL_MAP_I_TO_A: |
||
| 476 | for (i=0;i<ctx->Pixel.MapItoAsize;i++) { |
||
| 477 | values[i] = FLOAT_TO_UINT( ctx->Pixel.MapItoA[i] ); |
||
| 478 | } |
||
| 479 | break; |
||
| 480 | case GL_PIXEL_MAP_R_TO_R: |
||
| 481 | for (i=0;i<ctx->Pixel.MapRtoRsize;i++) { |
||
| 482 | values[i] = FLOAT_TO_UINT( ctx->Pixel.MapRtoR[i] ); |
||
| 483 | } |
||
| 484 | break; |
||
| 485 | case GL_PIXEL_MAP_G_TO_G: |
||
| 486 | for (i=0;i<ctx->Pixel.MapGtoGsize;i++) { |
||
| 487 | values[i] = FLOAT_TO_UINT( ctx->Pixel.MapGtoG[i] ); |
||
| 488 | } |
||
| 489 | break; |
||
| 490 | case GL_PIXEL_MAP_B_TO_B: |
||
| 491 | for (i=0;i<ctx->Pixel.MapBtoBsize;i++) { |
||
| 492 | values[i] = FLOAT_TO_UINT( ctx->Pixel.MapBtoB[i] ); |
||
| 493 | } |
||
| 494 | break; |
||
| 495 | case GL_PIXEL_MAP_A_TO_A: |
||
| 496 | for (i=0;i<ctx->Pixel.MapAtoAsize;i++) { |
||
| 497 | values[i] = FLOAT_TO_UINT( ctx->Pixel.MapAtoA[i] ); |
||
| 498 | } |
||
| 499 | break; |
||
| 500 | default: |
||
| 501 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" ); |
||
| 502 | } |
||
| 503 | } |
||
| 504 | |||
| 505 | |||
| 506 | void |
||
| 507 | _mesa_GetPixelMapusv( GLenum map, GLushort *values ) |
||
| 508 | { |
||
| 509 | GET_CURRENT_CONTEXT(ctx); |
||
| 510 | GLint i; |
||
| 511 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 512 | |||
| 513 | switch (map) { |
||
| 514 | case GL_PIXEL_MAP_I_TO_I: |
||
| 515 | for (i=0;i<ctx->Pixel.MapItoIsize;i++) { |
||
| 516 | values[i] = (GLushort) ctx->Pixel.MapItoI[i]; |
||
| 517 | } |
||
| 518 | break; |
||
| 519 | case GL_PIXEL_MAP_S_TO_S: |
||
| 520 | for (i=0;i<ctx->Pixel.MapStoSsize;i++) { |
||
| 521 | values[i] = (GLushort) ctx->Pixel.MapStoS[i]; |
||
| 522 | } |
||
| 523 | break; |
||
| 524 | case GL_PIXEL_MAP_I_TO_R: |
||
| 525 | for (i=0;i<ctx->Pixel.MapItoRsize;i++) { |
||
| 526 | values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoR[i] ); |
||
| 527 | } |
||
| 528 | break; |
||
| 529 | case GL_PIXEL_MAP_I_TO_G: |
||
| 530 | for (i=0;i<ctx->Pixel.MapItoGsize;i++) { |
||
| 531 | values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoG[i] ); |
||
| 532 | } |
||
| 533 | break; |
||
| 534 | case GL_PIXEL_MAP_I_TO_B: |
||
| 535 | for (i=0;i<ctx->Pixel.MapItoBsize;i++) { |
||
| 536 | values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoB[i] ); |
||
| 537 | } |
||
| 538 | break; |
||
| 539 | case GL_PIXEL_MAP_I_TO_A: |
||
| 540 | for (i=0;i<ctx->Pixel.MapItoAsize;i++) { |
||
| 541 | values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapItoA[i] ); |
||
| 542 | } |
||
| 543 | break; |
||
| 544 | case GL_PIXEL_MAP_R_TO_R: |
||
| 545 | for (i=0;i<ctx->Pixel.MapRtoRsize;i++) { |
||
| 546 | values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapRtoR[i] ); |
||
| 547 | } |
||
| 548 | break; |
||
| 549 | case GL_PIXEL_MAP_G_TO_G: |
||
| 550 | for (i=0;i<ctx->Pixel.MapGtoGsize;i++) { |
||
| 551 | values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapGtoG[i] ); |
||
| 552 | } |
||
| 553 | break; |
||
| 554 | case GL_PIXEL_MAP_B_TO_B: |
||
| 555 | for (i=0;i<ctx->Pixel.MapBtoBsize;i++) { |
||
| 556 | values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapBtoB[i] ); |
||
| 557 | } |
||
| 558 | break; |
||
| 559 | case GL_PIXEL_MAP_A_TO_A: |
||
| 560 | for (i=0;i<ctx->Pixel.MapAtoAsize;i++) { |
||
| 561 | values[i] = FLOAT_TO_USHORT( ctx->Pixel.MapAtoA[i] ); |
||
| 562 | } |
||
| 563 | break; |
||
| 564 | default: |
||
| 565 | _mesa_error( ctx, GL_INVALID_ENUM, "glGetPixelMapfv" ); |
||
| 566 | } |
||
| 567 | } |
||
| 568 | |||
| 569 | |||
| 570 | |||
| 571 | /**********************************************************************/ |
||
| 572 | /***** glPixelTransfer *****/ |
||
| 573 | /**********************************************************************/ |
||
| 574 | |||
| 575 | |||
| 576 | /* |
||
| 577 | * Implements glPixelTransfer[fi] whether called immediately or from a |
||
| 578 | * display list. |
||
| 579 | */ |
||
| 580 | void |
||
| 581 | _mesa_PixelTransferf( GLenum pname, GLfloat param ) |
||
| 582 | { |
||
| 583 | GET_CURRENT_CONTEXT(ctx); |
||
| 584 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 585 | |||
| 586 | switch (pname) { |
||
| 587 | case GL_MAP_COLOR: |
||
| 588 | if (ctx->Pixel.MapColorFlag == (param ? GL_TRUE : GL_FALSE)) |
||
| 589 | return; |
||
| 590 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 591 | ctx->Pixel.MapColorFlag = param ? GL_TRUE : GL_FALSE; |
||
| 592 | break; |
||
| 593 | case GL_MAP_STENCIL: |
||
| 594 | if (ctx->Pixel.MapStencilFlag == (param ? GL_TRUE : GL_FALSE)) |
||
| 595 | return; |
||
| 596 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 597 | ctx->Pixel.MapStencilFlag = param ? GL_TRUE : GL_FALSE; |
||
| 598 | break; |
||
| 599 | case GL_INDEX_SHIFT: |
||
| 600 | if (ctx->Pixel.IndexShift == (GLint) param) |
||
| 601 | return; |
||
| 602 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 603 | ctx->Pixel.IndexShift = (GLint) param; |
||
| 604 | break; |
||
| 605 | case GL_INDEX_OFFSET: |
||
| 606 | if (ctx->Pixel.IndexOffset == (GLint) param) |
||
| 607 | return; |
||
| 608 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 609 | ctx->Pixel.IndexOffset = (GLint) param; |
||
| 610 | break; |
||
| 611 | case GL_RED_SCALE: |
||
| 612 | if (ctx->Pixel.RedScale == param) |
||
| 613 | return; |
||
| 614 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 615 | ctx->Pixel.RedScale = param; |
||
| 616 | break; |
||
| 617 | case GL_RED_BIAS: |
||
| 618 | if (ctx->Pixel.RedBias == param) |
||
| 619 | return; |
||
| 620 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 621 | ctx->Pixel.RedBias = param; |
||
| 622 | break; |
||
| 623 | case GL_GREEN_SCALE: |
||
| 624 | if (ctx->Pixel.GreenScale == param) |
||
| 625 | return; |
||
| 626 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 627 | ctx->Pixel.GreenScale = param; |
||
| 628 | break; |
||
| 629 | case GL_GREEN_BIAS: |
||
| 630 | if (ctx->Pixel.GreenBias == param) |
||
| 631 | return; |
||
| 632 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 633 | ctx->Pixel.GreenBias = param; |
||
| 634 | break; |
||
| 635 | case GL_BLUE_SCALE: |
||
| 636 | if (ctx->Pixel.BlueScale == param) |
||
| 637 | return; |
||
| 638 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 639 | ctx->Pixel.BlueScale = param; |
||
| 640 | break; |
||
| 641 | case GL_BLUE_BIAS: |
||
| 642 | if (ctx->Pixel.BlueBias == param) |
||
| 643 | return; |
||
| 644 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 645 | ctx->Pixel.BlueBias = param; |
||
| 646 | break; |
||
| 647 | case GL_ALPHA_SCALE: |
||
| 648 | if (ctx->Pixel.AlphaScale == param) |
||
| 649 | return; |
||
| 650 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 651 | ctx->Pixel.AlphaScale = param; |
||
| 652 | break; |
||
| 653 | case GL_ALPHA_BIAS: |
||
| 654 | if (ctx->Pixel.AlphaBias == param) |
||
| 655 | return; |
||
| 656 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 657 | ctx->Pixel.AlphaBias = param; |
||
| 658 | break; |
||
| 659 | case GL_DEPTH_SCALE: |
||
| 660 | if (ctx->Pixel.DepthScale == param) |
||
| 661 | return; |
||
| 662 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 663 | ctx->Pixel.DepthScale = param; |
||
| 664 | break; |
||
| 665 | case GL_DEPTH_BIAS: |
||
| 666 | if (ctx->Pixel.DepthBias == param) |
||
| 667 | return; |
||
| 668 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 669 | ctx->Pixel.DepthBias = param; |
||
| 670 | break; |
||
| 671 | case GL_POST_COLOR_MATRIX_RED_SCALE: |
||
| 672 | if (ctx->Pixel.PostColorMatrixScale[0] == param) |
||
| 673 | return; |
||
| 674 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 675 | ctx->Pixel.PostColorMatrixScale[0] = param; |
||
| 676 | break; |
||
| 677 | case GL_POST_COLOR_MATRIX_RED_BIAS: |
||
| 678 | if (ctx->Pixel.PostColorMatrixBias[0] == param) |
||
| 679 | return; |
||
| 680 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 681 | ctx->Pixel.PostColorMatrixBias[0] = param; |
||
| 682 | break; |
||
| 683 | case GL_POST_COLOR_MATRIX_GREEN_SCALE: |
||
| 684 | if (ctx->Pixel.PostColorMatrixScale[1] == param) |
||
| 685 | return; |
||
| 686 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 687 | ctx->Pixel.PostColorMatrixScale[1] = param; |
||
| 688 | break; |
||
| 689 | case GL_POST_COLOR_MATRIX_GREEN_BIAS: |
||
| 690 | if (ctx->Pixel.PostColorMatrixBias[1] == param) |
||
| 691 | return; |
||
| 692 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 693 | ctx->Pixel.PostColorMatrixBias[1] = param; |
||
| 694 | break; |
||
| 695 | case GL_POST_COLOR_MATRIX_BLUE_SCALE: |
||
| 696 | if (ctx->Pixel.PostColorMatrixScale[2] == param) |
||
| 697 | return; |
||
| 698 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 699 | ctx->Pixel.PostColorMatrixScale[2] = param; |
||
| 700 | break; |
||
| 701 | case GL_POST_COLOR_MATRIX_BLUE_BIAS: |
||
| 702 | if (ctx->Pixel.PostColorMatrixBias[2] == param) |
||
| 703 | return; |
||
| 704 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 705 | ctx->Pixel.PostColorMatrixBias[2] = param; |
||
| 706 | break; |
||
| 707 | case GL_POST_COLOR_MATRIX_ALPHA_SCALE: |
||
| 708 | if (ctx->Pixel.PostColorMatrixScale[3] == param) |
||
| 709 | return; |
||
| 710 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 711 | ctx->Pixel.PostColorMatrixScale[3] = param; |
||
| 712 | break; |
||
| 713 | case GL_POST_COLOR_MATRIX_ALPHA_BIAS: |
||
| 714 | if (ctx->Pixel.PostColorMatrixBias[3] == param) |
||
| 715 | return; |
||
| 716 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 717 | ctx->Pixel.PostColorMatrixBias[3] = param; |
||
| 718 | break; |
||
| 719 | case GL_POST_CONVOLUTION_RED_SCALE: |
||
| 720 | if (ctx->Pixel.PostConvolutionScale[0] == param) |
||
| 721 | return; |
||
| 722 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 723 | ctx->Pixel.PostConvolutionScale[0] = param; |
||
| 724 | break; |
||
| 725 | case GL_POST_CONVOLUTION_RED_BIAS: |
||
| 726 | if (ctx->Pixel.PostConvolutionBias[0] == param) |
||
| 727 | return; |
||
| 728 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 729 | ctx->Pixel.PostConvolutionBias[0] = param; |
||
| 730 | break; |
||
| 731 | case GL_POST_CONVOLUTION_GREEN_SCALE: |
||
| 732 | if (ctx->Pixel.PostConvolutionScale[1] == param) |
||
| 733 | return; |
||
| 734 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 735 | ctx->Pixel.PostConvolutionScale[1] = param; |
||
| 736 | break; |
||
| 737 | case GL_POST_CONVOLUTION_GREEN_BIAS: |
||
| 738 | if (ctx->Pixel.PostConvolutionBias[1] == param) |
||
| 739 | return; |
||
| 740 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 741 | ctx->Pixel.PostConvolutionBias[1] = param; |
||
| 742 | break; |
||
| 743 | case GL_POST_CONVOLUTION_BLUE_SCALE: |
||
| 744 | if (ctx->Pixel.PostConvolutionScale[2] == param) |
||
| 745 | return; |
||
| 746 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 747 | ctx->Pixel.PostConvolutionScale[2] = param; |
||
| 748 | break; |
||
| 749 | case GL_POST_CONVOLUTION_BLUE_BIAS: |
||
| 750 | if (ctx->Pixel.PostConvolutionBias[2] == param) |
||
| 751 | return; |
||
| 752 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 753 | ctx->Pixel.PostConvolutionBias[2] = param; |
||
| 754 | break; |
||
| 755 | case GL_POST_CONVOLUTION_ALPHA_SCALE: |
||
| 756 | if (ctx->Pixel.PostConvolutionScale[2] == param) |
||
| 757 | return; |
||
| 758 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 759 | ctx->Pixel.PostConvolutionScale[2] = param; |
||
| 760 | break; |
||
| 761 | case GL_POST_CONVOLUTION_ALPHA_BIAS: |
||
| 762 | if (ctx->Pixel.PostConvolutionBias[2] == param) |
||
| 763 | return; |
||
| 764 | FLUSH_VERTICES(ctx, _NEW_PIXEL); |
||
| 765 | ctx->Pixel.PostConvolutionBias[2] = param; |
||
| 766 | break; |
||
| 767 | default: |
||
| 768 | _mesa_error( ctx, GL_INVALID_ENUM, "glPixelTransfer(pname)" ); |
||
| 769 | return; |
||
| 770 | } |
||
| 771 | } |
||
| 772 | |||
| 773 | |||
| 774 | void |
||
| 775 | _mesa_PixelTransferi( GLenum pname, GLint param ) |
||
| 776 | { |
||
| 777 | _mesa_PixelTransferf( pname, (GLfloat) param ); |
||
| 778 | } |
||
| 779 | |||
| 780 | |||
| 781 | |||
| 782 | /**********************************************************************/ |
||
| 783 | /***** Pixel processing functions ******/ |
||
| 784 | /**********************************************************************/ |
||
| 785 | |||
| 786 | |||
| 787 | /* |
||
| 788 | * Apply scale and bias factors to an array of RGBA pixels. |
||
| 789 | */ |
||
| 790 | void |
||
| 791 | _mesa_scale_and_bias_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4], |
||
| 792 | GLfloat rScale, GLfloat gScale, |
||
| 793 | GLfloat bScale, GLfloat aScale, |
||
| 794 | GLfloat rBias, GLfloat gBias, |
||
| 795 | GLfloat bBias, GLfloat aBias) |
||
| 796 | { |
||
| 797 | if (rScale != 1.0 || rBias != 0.0) { |
||
| 798 | GLuint i; |
||
| 799 | for (i = 0; i < n; i++) { |
||
| 800 | rgba[i][RCOMP] = rgba[i][RCOMP] * rScale + rBias; |
||
| 801 | } |
||
| 802 | } |
||
| 803 | if (gScale != 1.0 || gBias != 0.0) { |
||
| 804 | GLuint i; |
||
| 805 | for (i = 0; i < n; i++) { |
||
| 806 | rgba[i][GCOMP] = rgba[i][GCOMP] * gScale + gBias; |
||
| 807 | } |
||
| 808 | } |
||
| 809 | if (bScale != 1.0 || bBias != 0.0) { |
||
| 810 | GLuint i; |
||
| 811 | for (i = 0; i < n; i++) { |
||
| 812 | rgba[i][BCOMP] = rgba[i][BCOMP] * bScale + bBias; |
||
| 813 | } |
||
| 814 | } |
||
| 815 | if (aScale != 1.0 || aBias != 0.0) { |
||
| 816 | GLuint i; |
||
| 817 | for (i = 0; i < n; i++) { |
||
| 818 | rgba[i][ACOMP] = rgba[i][ACOMP] * aScale + aBias; |
||
| 819 | } |
||
| 820 | } |
||
| 821 | } |
||
| 822 | |||
| 823 | |||
| 824 | /* |
||
| 825 | * Apply pixel mapping to an array of floating point RGBA pixels. |
||
| 826 | */ |
||
| 827 | void |
||
| 828 | _mesa_map_rgba( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] ) |
||
| 829 | { |
||
| 830 | const GLfloat rscale = (GLfloat) (ctx->Pixel.MapRtoRsize - 1); |
||
| 831 | const GLfloat gscale = (GLfloat) (ctx->Pixel.MapGtoGsize - 1); |
||
| 832 | const GLfloat bscale = (GLfloat) (ctx->Pixel.MapBtoBsize - 1); |
||
| 833 | const GLfloat ascale = (GLfloat) (ctx->Pixel.MapAtoAsize - 1); |
||
| 834 | const GLfloat *rMap = ctx->Pixel.MapRtoR; |
||
| 835 | const GLfloat *gMap = ctx->Pixel.MapGtoG; |
||
| 836 | const GLfloat *bMap = ctx->Pixel.MapBtoB; |
||
| 837 | const GLfloat *aMap = ctx->Pixel.MapAtoA; |
||
| 838 | GLuint i; |
||
| 839 | for (i=0;i<n;i++) { |
||
| 840 | GLfloat r = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F); |
||
| 841 | GLfloat g = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F); |
||
| 842 | GLfloat b = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F); |
||
| 843 | GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F); |
||
| 844 | rgba[i][RCOMP] = rMap[IROUND(r * rscale)]; |
||
| 845 | rgba[i][GCOMP] = gMap[IROUND(g * gscale)]; |
||
| 846 | rgba[i][BCOMP] = bMap[IROUND(b * bscale)]; |
||
| 847 | rgba[i][ACOMP] = aMap[IROUND(a * ascale)]; |
||
| 848 | } |
||
| 849 | } |
||
| 850 | |||
| 851 | |||
| 852 | /* |
||
| 853 | * Apply the color matrix and post color matrix scaling and biasing. |
||
| 854 | */ |
||
| 855 | void |
||
| 856 | _mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4]) |
||
| 857 | { |
||
| 858 | const GLfloat rs = ctx->Pixel.PostColorMatrixScale[0]; |
||
| 859 | const GLfloat rb = ctx->Pixel.PostColorMatrixBias[0]; |
||
| 860 | const GLfloat gs = ctx->Pixel.PostColorMatrixScale[1]; |
||
| 861 | const GLfloat gb = ctx->Pixel.PostColorMatrixBias[1]; |
||
| 862 | const GLfloat bs = ctx->Pixel.PostColorMatrixScale[2]; |
||
| 863 | const GLfloat bb = ctx->Pixel.PostColorMatrixBias[2]; |
||
| 864 | const GLfloat as = ctx->Pixel.PostColorMatrixScale[3]; |
||
| 865 | const GLfloat ab = ctx->Pixel.PostColorMatrixBias[3]; |
||
| 866 | const GLfloat *m = ctx->ColorMatrixStack.Top->m; |
||
| 867 | GLuint i; |
||
| 868 | for (i = 0; i < n; i++) { |
||
| 869 | const GLfloat r = rgba[i][RCOMP]; |
||
| 870 | const GLfloat g = rgba[i][GCOMP]; |
||
| 871 | const GLfloat b = rgba[i][BCOMP]; |
||
| 872 | const GLfloat a = rgba[i][ACOMP]; |
||
| 873 | rgba[i][RCOMP] = (m[0] * r + m[4] * g + m[ 8] * b + m[12] * a) * rs + rb; |
||
| 874 | rgba[i][GCOMP] = (m[1] * r + m[5] * g + m[ 9] * b + m[13] * a) * gs + gb; |
||
| 875 | rgba[i][BCOMP] = (m[2] * r + m[6] * g + m[10] * b + m[14] * a) * bs + bb; |
||
| 876 | rgba[i][ACOMP] = (m[3] * r + m[7] * g + m[11] * b + m[15] * a) * as + ab; |
||
| 877 | } |
||
| 878 | } |
||
| 879 | |||
| 880 | |||
| 881 | /* |
||
| 882 | * Apply a color table lookup to an array of colors. |
||
| 883 | */ |
||
| 884 | void |
||
| 885 | _mesa_lookup_rgba(const struct gl_color_table *table, |
||
| 886 | GLuint n, GLfloat rgba[][4]) |
||
| 887 | { |
||
| 888 | ASSERT(table->FloatTable); |
||
| 889 | if (!table->Table || table->Size == 0) |
||
| 890 | return; |
||
| 891 | |||
| 892 | switch (table->Format) { |
||
| 893 | case GL_INTENSITY: |
||
| 894 | /* replace RGBA with I */ |
||
| 895 | if (!table->FloatTable) { |
||
| 896 | const GLint max = table->Size - 1; |
||
| 897 | const GLfloat scale = (GLfloat) max; |
||
| 898 | const GLchan *lut = (const GLchan *) table->Table; |
||
| 899 | GLuint i; |
||
| 900 | for (i = 0; i < n; i++) { |
||
| 901 | GLint j = IROUND(rgba[i][RCOMP] * scale); |
||
| 902 | GLfloat c = CHAN_TO_FLOAT(lut[CLAMP(j, 0, 1)]); |
||
| 903 | rgba[i][RCOMP] = rgba[i][GCOMP] = |
||
| 904 | rgba[i][BCOMP] = rgba[i][ACOMP] = c; |
||
| 905 | } |
||
| 906 | |||
| 907 | } |
||
| 908 | else { |
||
| 909 | const GLint max = table->Size - 1; |
||
| 910 | const GLfloat scale = (GLfloat) max; |
||
| 911 | const GLfloat *lut = (const GLfloat *) table->Table; |
||
| 912 | GLuint i; |
||
| 913 | for (i = 0; i < n; i++) { |
||
| 914 | GLint j = IROUND(rgba[i][RCOMP] * scale); |
||
| 915 | GLfloat c = lut[CLAMP(j, 0, max)]; |
||
| 916 | rgba[i][RCOMP] = rgba[i][GCOMP] = |
||
| 917 | rgba[i][BCOMP] = rgba[i][ACOMP] = c; |
||
| 918 | } |
||
| 919 | } |
||
| 920 | break; |
||
| 921 | case GL_LUMINANCE: |
||
| 922 | /* replace RGB with L */ |
||
| 923 | if (!table->FloatTable) { |
||
| 924 | const GLint max = table->Size - 1; |
||
| 925 | const GLfloat scale = (GLfloat) max; |
||
| 926 | const GLchan *lut = (const GLchan *) table->Table; |
||
| 927 | GLuint i; |
||
| 928 | for (i = 0; i < n; i++) { |
||
| 929 | GLint j = IROUND(rgba[i][RCOMP] * scale); |
||
| 930 | GLfloat c = CHAN_TO_FLOAT(lut[CLAMP(j, 0, max)]); |
||
| 931 | rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c; |
||
| 932 | } |
||
| 933 | } |
||
| 934 | else { |
||
| 935 | const GLint max = table->Size - 1; |
||
| 936 | const GLfloat scale = (GLfloat) max; |
||
| 937 | const GLfloat *lut = (const GLfloat *) table->Table; |
||
| 938 | GLuint i; |
||
| 939 | for (i = 0; i < n; i++) { |
||
| 940 | GLint j = IROUND(rgba[i][RCOMP] * scale); |
||
| 941 | GLfloat c = lut[CLAMP(j, 0, max)]; |
||
| 942 | rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = c; |
||
| 943 | } |
||
| 944 | } |
||
| 945 | break; |
||
| 946 | case GL_ALPHA: |
||
| 947 | /* replace A with A */ |
||
| 948 | if (!table->FloatTable) { |
||
| 949 | const GLint max = table->Size - 1; |
||
| 950 | const GLfloat scale = (GLfloat) max; |
||
| 951 | const GLchan *lut = (const GLchan *) table->Table; |
||
| 952 | GLuint i; |
||
| 953 | for (i = 0; i < n; i++) { |
||
| 954 | GLint j = IROUND(rgba[i][ACOMP] * scale); |
||
| 955 | rgba[i][ACOMP] = CHAN_TO_FLOAT(lut[CLAMP(j, 0, max)]); |
||
| 956 | } |
||
| 957 | } |
||
| 958 | else { |
||
| 959 | const GLint max = table->Size - 1; |
||
| 960 | const GLfloat scale = (GLfloat) max; |
||
| 961 | const GLfloat *lut = (const GLfloat *) table->Table; |
||
| 962 | GLuint i; |
||
| 963 | for (i = 0; i < n; i++) { |
||
| 964 | GLint j = IROUND(rgba[i][ACOMP] * scale); |
||
| 965 | rgba[i][ACOMP] = lut[CLAMP(j, 0, max)]; |
||
| 966 | } |
||
| 967 | } |
||
| 968 | break; |
||
| 969 | case GL_LUMINANCE_ALPHA: |
||
| 970 | /* replace RGBA with LLLA */ |
||
| 971 | if (!table->FloatTable) { |
||
| 972 | const GLint max = table->Size - 1; |
||
| 973 | const GLfloat scale = (GLfloat) max; |
||
| 974 | const GLchan *lut = (const GLchan *) table->Table; |
||
| 975 | GLuint i; |
||
| 976 | for (i = 0; i < n; i++) { |
||
| 977 | GLint jL = IROUND(rgba[i][RCOMP] * scale); |
||
| 978 | GLint jA = IROUND(rgba[i][ACOMP] * scale); |
||
| 979 | GLfloat luminance, alpha; |
||
| 980 | jL = CLAMP(jL, 0, max); |
||
| 981 | jA = CLAMP(jA, 0, max); |
||
| 982 | luminance = CHAN_TO_FLOAT(lut[jL * 2 + 0]); |
||
| 983 | alpha = CHAN_TO_FLOAT(lut[jA * 2 + 1]); |
||
| 984 | rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance; |
||
| 985 | rgba[i][ACOMP] = alpha;; |
||
| 986 | } |
||
| 987 | } |
||
| 988 | else { |
||
| 989 | const GLint max = table->Size - 1; |
||
| 990 | const GLfloat scale = (GLfloat) max; |
||
| 991 | const GLfloat *lut = (const GLfloat *) table->Table; |
||
| 992 | GLuint i; |
||
| 993 | for (i = 0; i < n; i++) { |
||
| 994 | GLint jL = IROUND(rgba[i][RCOMP] * scale); |
||
| 995 | GLint jA = IROUND(rgba[i][ACOMP] * scale); |
||
| 996 | GLfloat luminance, alpha; |
||
| 997 | jL = CLAMP(jL, 0, max); |
||
| 998 | jA = CLAMP(jA, 0, max); |
||
| 999 | luminance = lut[jL * 2 + 0]; |
||
| 1000 | alpha = lut[jA * 2 + 1]; |
||
| 1001 | rgba[i][RCOMP] = rgba[i][GCOMP] = rgba[i][BCOMP] = luminance; |
||
| 1002 | rgba[i][ACOMP] = alpha;; |
||
| 1003 | } |
||
| 1004 | } |
||
| 1005 | break; |
||
| 1006 | case GL_RGB: |
||
| 1007 | /* replace RGB with RGB */ |
||
| 1008 | if (!table->FloatTable) { |
||
| 1009 | const GLint max = table->Size - 1; |
||
| 1010 | const GLfloat scale = (GLfloat) max; |
||
| 1011 | const GLchan *lut = (const GLchan *) table->Table; |
||
| 1012 | GLuint i; |
||
| 1013 | for (i = 0; i < n; i++) { |
||
| 1014 | GLint jR = IROUND(rgba[i][RCOMP] * scale); |
||
| 1015 | GLint jG = IROUND(rgba[i][GCOMP] * scale); |
||
| 1016 | GLint jB = IROUND(rgba[i][BCOMP] * scale); |
||
| 1017 | jR = CLAMP(jR, 0, max); |
||
| 1018 | jG = CLAMP(jG, 0, max); |
||
| 1019 | jB = CLAMP(jB, 0, max); |
||
| 1020 | rgba[i][RCOMP] = CHAN_TO_FLOAT(lut[jR * 3 + 0]); |
||
| 1021 | rgba[i][GCOMP] = CHAN_TO_FLOAT(lut[jG * 3 + 1]); |
||
| 1022 | rgba[i][BCOMP] = CHAN_TO_FLOAT(lut[jB * 3 + 2]); |
||
| 1023 | } |
||
| 1024 | } |
||
| 1025 | else { |
||
| 1026 | const GLint max = table->Size - 1; |
||
| 1027 | const GLfloat scale = (GLfloat) max; |
||
| 1028 | const GLfloat *lut = (const GLfloat *) table->Table; |
||
| 1029 | GLuint i; |
||
| 1030 | for (i = 0; i < n; i++) { |
||
| 1031 | GLint jR = IROUND(rgba[i][RCOMP] * scale); |
||
| 1032 | GLint jG = IROUND(rgba[i][GCOMP] * scale); |
||
| 1033 | GLint jB = IROUND(rgba[i][BCOMP] * scale); |
||
| 1034 | jR = CLAMP(jR, 0, max); |
||
| 1035 | jG = CLAMP(jG, 0, max); |
||
| 1036 | jB = CLAMP(jB, 0, max); |
||
| 1037 | rgba[i][RCOMP] = lut[jR * 3 + 0]; |
||
| 1038 | rgba[i][GCOMP] = lut[jG * 3 + 1]; |
||
| 1039 | rgba[i][BCOMP] = lut[jB * 3 + 2]; |
||
| 1040 | } |
||
| 1041 | } |
||
| 1042 | break; |
||
| 1043 | case GL_RGBA: |
||
| 1044 | /* replace RGBA with RGBA */ |
||
| 1045 | if (!table->FloatTable) { |
||
| 1046 | const GLint max = table->Size - 1; |
||
| 1047 | const GLfloat scale = (GLfloat) max; |
||
| 1048 | const GLchan *lut = (const GLchan *) table->Table; |
||
| 1049 | GLuint i; |
||
| 1050 | for (i = 0; i < n; i++) { |
||
| 1051 | GLint jR = IROUND(rgba[i][RCOMP] * scale); |
||
| 1052 | GLint jG = IROUND(rgba[i][GCOMP] * scale); |
||
| 1053 | GLint jB = IROUND(rgba[i][BCOMP] * scale); |
||
| 1054 | GLint jA = IROUND(rgba[i][ACOMP] * scale); |
||
| 1055 | jR = CLAMP(jR, 0, max); |
||
| 1056 | jG = CLAMP(jG, 0, max); |
||
| 1057 | jB = CLAMP(jB, 0, max); |
||
| 1058 | jA = CLAMP(jA, 0, max); |
||
| 1059 | rgba[i][RCOMP] = CHAN_TO_FLOAT(lut[jR * 4 + 0]); |
||
| 1060 | rgba[i][GCOMP] = CHAN_TO_FLOAT(lut[jG * 4 + 1]); |
||
| 1061 | rgba[i][BCOMP] = CHAN_TO_FLOAT(lut[jB * 4 + 2]); |
||
| 1062 | rgba[i][ACOMP] = CHAN_TO_FLOAT(lut[jA * 4 + 3]); |
||
| 1063 | } |
||
| 1064 | } |
||
| 1065 | else { |
||
| 1066 | const GLint max = table->Size - 1; |
||
| 1067 | const GLfloat scale = (GLfloat) max; |
||
| 1068 | const GLfloat *lut = (const GLfloat *) table->Table; |
||
| 1069 | GLuint i; |
||
| 1070 | for (i = 0; i < n; i++) { |
||
| 1071 | GLint jR = IROUND(rgba[i][RCOMP] * scale); |
||
| 1072 | GLint jG = IROUND(rgba[i][GCOMP] * scale); |
||
| 1073 | GLint jB = IROUND(rgba[i][BCOMP] * scale); |
||
| 1074 | GLint jA = IROUND(rgba[i][ACOMP] * scale); |
||
| 1075 | jR = CLAMP(jR, 0, max); |
||
| 1076 | jG = CLAMP(jG, 0, max); |
||
| 1077 | jB = CLAMP(jB, 0, max); |
||
| 1078 | jA = CLAMP(jA, 0, max); |
||
| 1079 | rgba[i][RCOMP] = lut[jR * 4 + 0]; |
||
| 1080 | rgba[i][GCOMP] = lut[jG * 4 + 1]; |
||
| 1081 | rgba[i][BCOMP] = lut[jB * 4 + 2]; |
||
| 1082 | rgba[i][ACOMP] = lut[jA * 4 + 3]; |
||
| 1083 | } |
||
| 1084 | } |
||
| 1085 | break; |
||
| 1086 | default: |
||
| 1087 | _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba"); |
||
| 1088 | return; |
||
| 1089 | } |
||
| 1090 | } |
||
| 1091 | |||
| 1092 | |||
| 1093 | |||
| 1094 | /* |
||
| 1095 | * Apply color index shift and offset to an array of pixels. |
||
| 1096 | */ |
||
| 1097 | void |
||
| 1098 | _mesa_shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] ) |
||
| 1099 | { |
||
| 1100 | GLint shift = ctx->Pixel.IndexShift; |
||
| 1101 | GLint offset = ctx->Pixel.IndexOffset; |
||
| 1102 | GLuint i; |
||
| 1103 | if (shift > 0) { |
||
| 1104 | for (i=0;i<n;i++) { |
||
| 1105 | indexes[i] = (indexes[i] << shift) + offset; |
||
| 1106 | } |
||
| 1107 | } |
||
| 1108 | else if (shift < 0) { |
||
| 1109 | shift = -shift; |
||
| 1110 | for (i=0;i<n;i++) { |
||
| 1111 | indexes[i] = (indexes[i] >> shift) + offset; |
||
| 1112 | } |
||
| 1113 | } |
||
| 1114 | else { |
||
| 1115 | for (i=0;i<n;i++) { |
||
| 1116 | indexes[i] = indexes[i] + offset; |
||
| 1117 | } |
||
| 1118 | } |
||
| 1119 | } |
||
| 1120 | |||
| 1121 | |||
| 1122 | /* |
||
| 1123 | * Apply color index mapping to color indexes. |
||
| 1124 | */ |
||
| 1125 | void |
||
| 1126 | _mesa_map_ci( const GLcontext *ctx, GLuint n, GLuint index[] ) |
||
| 1127 | { |
||
| 1128 | GLuint mask = ctx->Pixel.MapItoIsize - 1; |
||
| 1129 | GLuint i; |
||
| 1130 | for (i=0;i<n;i++) { |
||
| 1131 | index[i] = ctx->Pixel.MapItoI[ index[i] & mask ]; |
||
| 1132 | } |
||
| 1133 | } |
||
| 1134 | |||
| 1135 | |||
| 1136 | /* |
||
| 1137 | * Map color indexes to rgba values. |
||
| 1138 | */ |
||
| 1139 | void |
||
| 1140 | _mesa_map_ci_to_rgba_chan( const GLcontext *ctx, GLuint n, |
||
| 1141 | const GLuint index[], GLchan rgba[][4] ) |
||
| 1142 | { |
||
| 1143 | #if CHAN_BITS == 8 |
||
| 1144 | GLuint rmask = ctx->Pixel.MapItoRsize - 1; |
||
| 1145 | GLuint gmask = ctx->Pixel.MapItoGsize - 1; |
||
| 1146 | GLuint bmask = ctx->Pixel.MapItoBsize - 1; |
||
| 1147 | GLuint amask = ctx->Pixel.MapItoAsize - 1; |
||
| 1148 | const GLubyte *rMap = ctx->Pixel.MapItoR8; |
||
| 1149 | const GLubyte *gMap = ctx->Pixel.MapItoG8; |
||
| 1150 | const GLubyte *bMap = ctx->Pixel.MapItoB8; |
||
| 1151 | const GLubyte *aMap = ctx->Pixel.MapItoA8; |
||
| 1152 | GLuint i; |
||
| 1153 | for (i=0;i<n;i++) { |
||
| 1154 | rgba[i][RCOMP] = rMap[index[i] & rmask]; |
||
| 1155 | rgba[i][GCOMP] = gMap[index[i] & gmask]; |
||
| 1156 | rgba[i][BCOMP] = bMap[index[i] & bmask]; |
||
| 1157 | rgba[i][ACOMP] = aMap[index[i] & amask]; |
||
| 1158 | } |
||
| 1159 | #else |
||
| 1160 | GLuint rmask = ctx->Pixel.MapItoRsize - 1; |
||
| 1161 | GLuint gmask = ctx->Pixel.MapItoGsize - 1; |
||
| 1162 | GLuint bmask = ctx->Pixel.MapItoBsize - 1; |
||
| 1163 | GLuint amask = ctx->Pixel.MapItoAsize - 1; |
||
| 1164 | const GLfloat *rMap = ctx->Pixel.MapItoR; |
||
| 1165 | const GLfloat *gMap = ctx->Pixel.MapItoG; |
||
| 1166 | const GLfloat *bMap = ctx->Pixel.MapItoB; |
||
| 1167 | const GLfloat *aMap = ctx->Pixel.MapItoA; |
||
| 1168 | GLuint i; |
||
| 1169 | for (i=0;i<n;i++) { |
||
| 1170 | CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], rMap[index[i] & rmask]); |
||
| 1171 | CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], gMap[index[i] & gmask]); |
||
| 1172 | CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], bMap[index[i] & bmask]); |
||
| 1173 | CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], aMap[index[i] & amask]); |
||
| 1174 | } |
||
| 1175 | #endif |
||
| 1176 | } |
||
| 1177 | |||
| 1178 | |||
| 1179 | /* |
||
| 1180 | * Map color indexes to float rgba values. |
||
| 1181 | */ |
||
| 1182 | void |
||
| 1183 | _mesa_map_ci_to_rgba( const GLcontext *ctx, GLuint n, |
||
| 1184 | const GLuint index[], GLfloat rgba[][4] ) |
||
| 1185 | { |
||
| 1186 | GLuint rmask = ctx->Pixel.MapItoRsize - 1; |
||
| 1187 | GLuint gmask = ctx->Pixel.MapItoGsize - 1; |
||
| 1188 | GLuint bmask = ctx->Pixel.MapItoBsize - 1; |
||
| 1189 | GLuint amask = ctx->Pixel.MapItoAsize - 1; |
||
| 1190 | const GLfloat *rMap = ctx->Pixel.MapItoR; |
||
| 1191 | const GLfloat *gMap = ctx->Pixel.MapItoG; |
||
| 1192 | const GLfloat *bMap = ctx->Pixel.MapItoB; |
||
| 1193 | const GLfloat *aMap = ctx->Pixel.MapItoA; |
||
| 1194 | GLuint i; |
||
| 1195 | for (i=0;i<n;i++) { |
||
| 1196 | rgba[i][RCOMP] = rMap[index[i] & rmask]; |
||
| 1197 | rgba[i][GCOMP] = gMap[index[i] & gmask]; |
||
| 1198 | rgba[i][BCOMP] = bMap[index[i] & bmask]; |
||
| 1199 | rgba[i][ACOMP] = aMap[index[i] & amask]; |
||
| 1200 | } |
||
| 1201 | } |
||
| 1202 | |||
| 1203 | |||
| 1204 | /* |
||
| 1205 | * Map 8-bit color indexes to rgb values. |
||
| 1206 | */ |
||
| 1207 | void |
||
| 1208 | _mesa_map_ci8_to_rgba( const GLcontext *ctx, GLuint n, const GLubyte index[], |
||
| 1209 | GLchan rgba[][4] ) |
||
| 1210 | { |
||
| 1211 | #if CHAN_BITS == 8 |
||
| 1212 | GLuint rmask = ctx->Pixel.MapItoRsize - 1; |
||
| 1213 | GLuint gmask = ctx->Pixel.MapItoGsize - 1; |
||
| 1214 | GLuint bmask = ctx->Pixel.MapItoBsize - 1; |
||
| 1215 | GLuint amask = ctx->Pixel.MapItoAsize - 1; |
||
| 1216 | const GLubyte *rMap = ctx->Pixel.MapItoR8; |
||
| 1217 | const GLubyte *gMap = ctx->Pixel.MapItoG8; |
||
| 1218 | const GLubyte *bMap = ctx->Pixel.MapItoB8; |
||
| 1219 | const GLubyte *aMap = ctx->Pixel.MapItoA8; |
||
| 1220 | GLuint i; |
||
| 1221 | for (i=0;i<n;i++) { |
||
| 1222 | rgba[i][RCOMP] = rMap[index[i] & rmask]; |
||
| 1223 | rgba[i][GCOMP] = gMap[index[i] & gmask]; |
||
| 1224 | rgba[i][BCOMP] = bMap[index[i] & bmask]; |
||
| 1225 | rgba[i][ACOMP] = aMap[index[i] & amask]; |
||
| 1226 | } |
||
| 1227 | #else |
||
| 1228 | GLuint rmask = ctx->Pixel.MapItoRsize - 1; |
||
| 1229 | GLuint gmask = ctx->Pixel.MapItoGsize - 1; |
||
| 1230 | GLuint bmask = ctx->Pixel.MapItoBsize - 1; |
||
| 1231 | GLuint amask = ctx->Pixel.MapItoAsize - 1; |
||
| 1232 | const GLfloat *rMap = ctx->Pixel.MapItoR; |
||
| 1233 | const GLfloat *gMap = ctx->Pixel.MapItoG; |
||
| 1234 | const GLfloat *bMap = ctx->Pixel.MapItoB; |
||
| 1235 | const GLfloat *aMap = ctx->Pixel.MapItoA; |
||
| 1236 | GLuint i; |
||
| 1237 | for (i=0;i<n;i++) { |
||
| 1238 | CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], rMap[index[i] & rmask]); |
||
| 1239 | CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], gMap[index[i] & gmask]); |
||
| 1240 | CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], bMap[index[i] & bmask]); |
||
| 1241 | CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], aMap[index[i] & amask]); |
||
| 1242 | } |
||
| 1243 | #endif |
||
| 1244 | } |
||
| 1245 | |||
| 1246 | |||
| 1247 | void |
||
| 1248 | _mesa_shift_and_offset_stencil( const GLcontext *ctx, GLuint n, |
||
| 1249 | GLstencil stencil[] ) |
||
| 1250 | { |
||
| 1251 | GLuint i; |
||
| 1252 | GLint shift = ctx->Pixel.IndexShift; |
||
| 1253 | GLint offset = ctx->Pixel.IndexOffset; |
||
| 1254 | if (shift > 0) { |
||
| 1255 | for (i=0;i<n;i++) { |
||
| 1256 | stencil[i] = (stencil[i] << shift) + offset; |
||
| 1257 | } |
||
| 1258 | } |
||
| 1259 | else if (shift < 0) { |
||
| 1260 | shift = -shift; |
||
| 1261 | for (i=0;i<n;i++) { |
||
| 1262 | stencil[i] = (stencil[i] >> shift) + offset; |
||
| 1263 | } |
||
| 1264 | } |
||
| 1265 | else { |
||
| 1266 | for (i=0;i<n;i++) { |
||
| 1267 | stencil[i] = stencil[i] + offset; |
||
| 1268 | } |
||
| 1269 | } |
||
| 1270 | |||
| 1271 | } |
||
| 1272 | |||
| 1273 | |||
| 1274 | void |
||
| 1275 | _mesa_map_stencil( const GLcontext *ctx, GLuint n, GLstencil stencil[] ) |
||
| 1276 | { |
||
| 1277 | GLuint mask = ctx->Pixel.MapStoSsize - 1; |
||
| 1278 | GLuint i; |
||
| 1279 | for (i=0;i<n;i++) { |
||
| 1280 | stencil[i] = ctx->Pixel.MapStoS[ stencil[i] & mask ]; |
||
| 1281 | } |
||
| 1282 | } |
||
| 1283 | |||
| 1284 | |||
| 1285 | |||
| 1286 | /* |
||
| 1287 | * This function converts an array of GLchan colors to GLfloat colors. |
||
| 1288 | * Most importantly, it undoes the non-uniform quantization of pixel |
||
| 1289 | * values introduced when we convert shallow (< 8 bit) pixel values |
||
| 1290 | * to GLubytes in the ctx->Driver.ReadRGBASpan() functions. |
||
| 1291 | * This fixes a number of OpenGL conformance failures when running on |
||
| 1292 | * 16bpp displays, for example. |
||
| 1293 | */ |
||
| 1294 | void |
||
| 1295 | _mesa_chan_to_float_span(const GLcontext *ctx, GLuint n, |
||
| 1296 | CONST GLchan rgba[][4], GLfloat rgbaf[][4]) |
||
| 1297 | { |
||
| 1298 | #if CHAN_TYPE == GL_FLOAT |
||
| 1299 | MEMCPY(rgbaf, rgba, n * 4 * sizeof(GLfloat)); |
||
| 1300 | #else |
||
| 1301 | const GLuint rShift = CHAN_BITS - ctx->Visual.redBits; |
||
| 1302 | const GLuint gShift = CHAN_BITS - ctx->Visual.greenBits; |
||
| 1303 | const GLuint bShift = CHAN_BITS - ctx->Visual.blueBits; |
||
| 1304 | GLuint aShift; |
||
| 1305 | const GLfloat rScale = 1.0F / (GLfloat) ((1 << ctx->Visual.redBits ) - 1); |
||
| 1306 | const GLfloat gScale = 1.0F / (GLfloat) ((1 << ctx->Visual.greenBits) - 1); |
||
| 1307 | const GLfloat bScale = 1.0F / (GLfloat) ((1 << ctx->Visual.blueBits ) - 1); |
||
| 1308 | GLfloat aScale; |
||
| 1309 | GLuint i; |
||
| 1310 | |||
| 1311 | if (ctx->Visual.alphaBits > 0) { |
||
| 1312 | aShift = CHAN_BITS - ctx->Visual.alphaBits; |
||
| 1313 | aScale = 1.0F / (GLfloat) ((1 << ctx->Visual.alphaBits) - 1); |
||
| 1314 | } |
||
| 1315 | else { |
||
| 1316 | aShift = 0; |
||
| 1317 | aScale = 1.0F / CHAN_MAXF; |
||
| 1318 | } |
||
| 1319 | |||
| 1320 | for (i = 0; i < n; i++) { |
||
| 1321 | const GLint r = rgba[i][RCOMP] >> rShift; |
||
| 1322 | const GLint g = rgba[i][GCOMP] >> gShift; |
||
| 1323 | const GLint b = rgba[i][BCOMP] >> bShift; |
||
| 1324 | const GLint a = rgba[i][ACOMP] >> aShift; |
||
| 1325 | rgbaf[i][RCOMP] = (GLfloat) r * rScale; |
||
| 1326 | rgbaf[i][GCOMP] = (GLfloat) g * gScale; |
||
| 1327 | rgbaf[i][BCOMP] = (GLfloat) b * bScale; |
||
| 1328 | rgbaf[i][ACOMP] = (GLfloat) a * aScale; |
||
| 1329 | } |
||
| 1330 | #endif |
||
| 1331 | } |