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| 1901 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * Version: 7.1 |
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| 4 | * |
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| 5 | * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. |
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| 6 | * |
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| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 8 | * copy of this software and associated documentation files (the "Software"), |
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| 9 | * to deal in the Software without restriction, including without limitation |
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| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 12 | * Software is furnished to do so, subject to the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice shall be included |
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| 15 | * in all copies or substantial portions of the Software. |
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| 16 | * |
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
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| 18 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 20 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
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| 21 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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| 22 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 23 | */ |
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| 24 | |||
| 25 | /** |
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| 26 | * \file pixelstore.c |
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| 27 | * glPixelStore functions. |
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| 28 | */ |
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| 29 | |||
| 30 | |||
| 31 | #include "glheader.h" |
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| 32 | #include "bufferobj.h" |
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| 33 | #include "context.h" |
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| 34 | #include "pixelstore.h" |
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| 35 | #include "mtypes.h" |
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| 36 | |||
| 37 | |||
| 38 | void GLAPIENTRY |
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| 39 | _mesa_PixelStorei( GLenum pname, GLint param ) |
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| 40 | { |
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| 41 | /* NOTE: this call can't be compiled into the display list */ |
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| 42 | GET_CURRENT_CONTEXT(ctx); |
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| 43 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
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| 44 | |||
| 45 | switch (pname) { |
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| 46 | case GL_PACK_SWAP_BYTES: |
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| 47 | if (param == (GLint)ctx->Pack.SwapBytes) |
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| 48 | return; |
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| 49 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 50 | ctx->Pack.SwapBytes = param ? GL_TRUE : GL_FALSE; |
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| 51 | break; |
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| 52 | case GL_PACK_LSB_FIRST: |
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| 53 | if (param == (GLint)ctx->Pack.LsbFirst) |
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| 54 | return; |
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| 55 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 56 | ctx->Pack.LsbFirst = param ? GL_TRUE : GL_FALSE; |
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| 57 | break; |
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| 58 | case GL_PACK_ROW_LENGTH: |
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| 59 | if (param<0) { |
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| 60 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 61 | return; |
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| 62 | } |
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| 63 | if (ctx->Pack.RowLength == param) |
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| 64 | return; |
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| 65 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 66 | ctx->Pack.RowLength = param; |
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| 67 | break; |
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| 68 | case GL_PACK_IMAGE_HEIGHT: |
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| 69 | if (param<0) { |
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| 70 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 71 | return; |
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| 72 | } |
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| 73 | if (ctx->Pack.ImageHeight == param) |
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| 74 | return; |
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| 75 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 76 | ctx->Pack.ImageHeight = param; |
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| 77 | break; |
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| 78 | case GL_PACK_SKIP_PIXELS: |
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| 79 | if (param<0) { |
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| 80 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 81 | return; |
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| 82 | } |
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| 83 | if (ctx->Pack.SkipPixels == param) |
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| 84 | return; |
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| 85 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 86 | ctx->Pack.SkipPixels = param; |
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| 87 | break; |
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| 88 | case GL_PACK_SKIP_ROWS: |
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| 89 | if (param<0) { |
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| 90 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 91 | return; |
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| 92 | } |
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| 93 | if (ctx->Pack.SkipRows == param) |
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| 94 | return; |
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| 95 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 96 | ctx->Pack.SkipRows = param; |
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| 97 | break; |
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| 98 | case GL_PACK_SKIP_IMAGES: |
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| 99 | if (param<0) { |
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| 100 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 101 | return; |
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| 102 | } |
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| 103 | if (ctx->Pack.SkipImages == param) |
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| 104 | return; |
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| 105 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 106 | ctx->Pack.SkipImages = param; |
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| 107 | break; |
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| 108 | case GL_PACK_ALIGNMENT: |
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| 109 | if (param!=1 && param!=2 && param!=4 && param!=8) { |
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| 110 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 111 | return; |
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| 112 | } |
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| 113 | if (ctx->Pack.Alignment == param) |
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| 114 | return; |
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| 115 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 116 | ctx->Pack.Alignment = param; |
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| 117 | break; |
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| 118 | case GL_PACK_INVERT_MESA: |
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| 119 | if (!ctx->Extensions.MESA_pack_invert) { |
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| 120 | _mesa_error( ctx, GL_INVALID_ENUM, "glPixelstore(pname)" ); |
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| 121 | return; |
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| 122 | } |
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| 123 | if (ctx->Pack.Invert == param) |
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| 124 | return; |
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| 125 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 126 | ctx->Pack.Invert = param; |
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| 127 | break; |
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| 128 | |||
| 129 | case GL_UNPACK_SWAP_BYTES: |
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| 130 | if (param == (GLint)ctx->Unpack.SwapBytes) |
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| 131 | return; |
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| 132 | if ((GLint)ctx->Unpack.SwapBytes == param) |
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| 133 | return; |
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| 134 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 135 | ctx->Unpack.SwapBytes = param ? GL_TRUE : GL_FALSE; |
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| 136 | break; |
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| 137 | case GL_UNPACK_LSB_FIRST: |
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| 138 | if (param == (GLint)ctx->Unpack.LsbFirst) |
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| 139 | return; |
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| 140 | if ((GLint)ctx->Unpack.LsbFirst == param) |
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| 141 | return; |
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| 142 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 143 | ctx->Unpack.LsbFirst = param ? GL_TRUE : GL_FALSE; |
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| 144 | break; |
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| 145 | case GL_UNPACK_ROW_LENGTH: |
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| 146 | if (param<0) { |
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| 147 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 148 | return; |
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| 149 | } |
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| 150 | if (ctx->Unpack.RowLength == param) |
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| 151 | return; |
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| 152 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 153 | ctx->Unpack.RowLength = param; |
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| 154 | break; |
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| 155 | case GL_UNPACK_IMAGE_HEIGHT: |
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| 156 | if (param<0) { |
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| 157 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 158 | return; |
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| 159 | } |
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| 160 | if (ctx->Unpack.ImageHeight == param) |
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| 161 | return; |
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| 162 | |||
| 163 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 164 | ctx->Unpack.ImageHeight = param; |
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| 165 | break; |
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| 166 | case GL_UNPACK_SKIP_PIXELS: |
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| 167 | if (param<0) { |
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| 168 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 169 | return; |
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| 170 | } |
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| 171 | if (ctx->Unpack.SkipPixels == param) |
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| 172 | return; |
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| 173 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 174 | ctx->Unpack.SkipPixels = param; |
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| 175 | break; |
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| 176 | case GL_UNPACK_SKIP_ROWS: |
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| 177 | if (param<0) { |
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| 178 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 179 | return; |
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| 180 | } |
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| 181 | if (ctx->Unpack.SkipRows == param) |
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| 182 | return; |
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| 183 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 184 | ctx->Unpack.SkipRows = param; |
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| 185 | break; |
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| 186 | case GL_UNPACK_SKIP_IMAGES: |
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| 187 | if (param < 0) { |
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| 188 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore(param)" ); |
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| 189 | return; |
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| 190 | } |
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| 191 | if (ctx->Unpack.SkipImages == param) |
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| 192 | return; |
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| 193 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 194 | ctx->Unpack.SkipImages = param; |
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| 195 | break; |
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| 196 | case GL_UNPACK_ALIGNMENT: |
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| 197 | if (param!=1 && param!=2 && param!=4 && param!=8) { |
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| 198 | _mesa_error( ctx, GL_INVALID_VALUE, "glPixelStore" ); |
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| 199 | return; |
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| 200 | } |
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| 201 | if (ctx->Unpack.Alignment == param) |
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| 202 | return; |
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| 203 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 204 | ctx->Unpack.Alignment = param; |
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| 205 | break; |
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| 206 | case GL_UNPACK_CLIENT_STORAGE_APPLE: |
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| 207 | if (param == (GLint)ctx->Unpack.ClientStorage) |
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| 208 | return; |
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| 209 | FLUSH_VERTICES(ctx, _NEW_PACKUNPACK); |
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| 210 | ctx->Unpack.ClientStorage = param ? GL_TRUE : GL_FALSE; |
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| 211 | break; |
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| 212 | default: |
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| 213 | _mesa_error( ctx, GL_INVALID_ENUM, "glPixelStore" ); |
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| 214 | return; |
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| 215 | } |
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| 216 | } |
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| 217 | |||
| 218 | |||
| 219 | void GLAPIENTRY |
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| 220 | _mesa_PixelStoref( GLenum pname, GLfloat param ) |
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| 221 | { |
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| 222 | _mesa_PixelStorei( pname, (GLint) param ); |
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| 223 | } |
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| 224 | |||
| 225 | |||
| 226 | |||
| 227 | /** |
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| 228 | * Initialize the context's pixel store state. |
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| 229 | */ |
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| 230 | void |
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| 231 | _mesa_init_pixelstore( struct gl_context *ctx ) |
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| 232 | { |
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| 233 | /* Pixel transfer */ |
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| 234 | ctx->Pack.Alignment = 4; |
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| 235 | ctx->Pack.RowLength = 0; |
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| 236 | ctx->Pack.ImageHeight = 0; |
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| 237 | ctx->Pack.SkipPixels = 0; |
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| 238 | ctx->Pack.SkipRows = 0; |
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| 239 | ctx->Pack.SkipImages = 0; |
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| 240 | ctx->Pack.SwapBytes = GL_FALSE; |
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| 241 | ctx->Pack.LsbFirst = GL_FALSE; |
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| 242 | ctx->Pack.ClientStorage = GL_FALSE; |
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| 243 | ctx->Pack.Invert = GL_FALSE; |
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| 244 | #if FEATURE_EXT_pixel_buffer_object |
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| 245 | _mesa_reference_buffer_object(ctx, &ctx->Pack.BufferObj, |
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| 246 | ctx->Shared->NullBufferObj); |
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| 247 | #endif |
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| 248 | ctx->Unpack.Alignment = 4; |
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| 249 | ctx->Unpack.RowLength = 0; |
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| 250 | ctx->Unpack.ImageHeight = 0; |
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| 251 | ctx->Unpack.SkipPixels = 0; |
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| 252 | ctx->Unpack.SkipRows = 0; |
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| 253 | ctx->Unpack.SkipImages = 0; |
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| 254 | ctx->Unpack.SwapBytes = GL_FALSE; |
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| 255 | ctx->Unpack.LsbFirst = GL_FALSE; |
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| 256 | ctx->Unpack.ClientStorage = GL_FALSE; |
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| 257 | ctx->Unpack.Invert = GL_FALSE; |
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| 258 | #if FEATURE_EXT_pixel_buffer_object |
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| 259 | _mesa_reference_buffer_object(ctx, &ctx->Unpack.BufferObj, |
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| 260 | ctx->Shared->NullBufferObj); |
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| 261 | #endif |
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| 262 | |||
| 263 | /* |
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| 264 | * _mesa_unpack_image() returns image data in this format. When we |
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| 265 | * execute image commands (glDrawPixels(), glTexImage(), etc) from |
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| 266 | * within display lists we have to be sure to set the current |
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| 267 | * unpacking parameters to these values! |
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| 268 | */ |
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| 269 | ctx->DefaultPacking.Alignment = 1; |
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| 270 | ctx->DefaultPacking.RowLength = 0; |
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| 271 | ctx->DefaultPacking.SkipPixels = 0; |
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| 272 | ctx->DefaultPacking.SkipRows = 0; |
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| 273 | ctx->DefaultPacking.ImageHeight = 0; |
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| 274 | ctx->DefaultPacking.SkipImages = 0; |
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| 275 | ctx->DefaultPacking.SwapBytes = GL_FALSE; |
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| 276 | ctx->DefaultPacking.LsbFirst = GL_FALSE; |
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| 277 | ctx->DefaultPacking.ClientStorage = GL_FALSE; |
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| 278 | ctx->DefaultPacking.Invert = GL_FALSE; |
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| 279 | #if FEATURE_EXT_pixel_buffer_object |
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| 280 | _mesa_reference_buffer_object(ctx, &ctx->DefaultPacking.BufferObj, |
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| 281 | ctx->Shared->NullBufferObj); |
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| 282 | #endif |
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| 283 | } |