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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 55 | pj | 1 | /* $Id: drawpix.c,v 1.1 2003-02-28 11:42:00 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 "drawpix.h" |
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| 32 | #include "feedback.h" |
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| 33 | #include "macros.h" |
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| 34 | #include "mmath.h" |
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| 35 | #include "state.h" |
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| 36 | #include "mtypes.h" |
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| 37 | |||
| 38 | |||
| 39 | /* |
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| 40 | * Execute glDrawPixels |
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| 41 | */ |
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| 42 | void |
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| 43 | _mesa_DrawPixels( GLsizei width, GLsizei height, |
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| 44 | GLenum format, GLenum type, const GLvoid *pixels ) |
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| 45 | { |
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| 46 | GET_CURRENT_CONTEXT(ctx); |
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| 47 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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| 48 | |||
| 49 | if (width < 0 || height < 0) { |
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| 50 | _mesa_error( ctx, GL_INVALID_VALUE, "glDrawPixels(width or height < 0" ); |
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| 51 | return; |
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| 52 | } |
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| 53 | |||
| 54 | if (ctx->RenderMode==GL_RENDER) { |
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| 55 | GLint x, y; |
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| 56 | if (!pixels || !ctx->Current.RasterPosValid) { |
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| 57 | return; |
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| 58 | } |
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| 59 | |||
| 60 | if (ctx->NewState) { |
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| 61 | _mesa_update_state(ctx); |
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| 62 | } |
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| 63 | |||
| 64 | /* Round, to satisfy conformance tests (matches SGI's OpenGL) */ |
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| 65 | x = IROUND(ctx->Current.RasterPos[0]); |
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| 66 | y = IROUND(ctx->Current.RasterPos[1]); |
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| 67 | |||
| 68 | ctx->OcclusionResult = GL_TRUE; |
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| 69 | ctx->Driver.DrawPixels(ctx, x, y, width, height, format, type, |
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| 70 | &ctx->Unpack, pixels); |
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| 71 | } |
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| 72 | else if (ctx->RenderMode==GL_FEEDBACK) { |
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| 73 | /* Feedback the current raster pos info */ |
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| 74 | if (ctx->Current.RasterPosValid) { |
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| 75 | FLUSH_CURRENT( ctx, 0 ); |
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| 76 | FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN ); |
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| 77 | _mesa_feedback_vertex( ctx, |
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| 78 | ctx->Current.RasterPos, |
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| 79 | ctx->Current.RasterColor, |
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| 80 | ctx->Current.RasterIndex, |
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| 81 | ctx->Current.RasterTexCoords[0] ); |
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| 82 | } |
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| 83 | } |
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| 84 | else if (ctx->RenderMode==GL_SELECT) { |
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| 85 | if (ctx->Current.RasterPosValid) { |
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| 86 | _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); |
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| 87 | } |
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| 88 | } |
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| 89 | } |
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| 90 | |||
| 91 | |||
| 92 | |||
| 93 | void |
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| 94 | _mesa_ReadPixels( GLint x, GLint y, GLsizei width, GLsizei height, |
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| 95 | GLenum format, GLenum type, GLvoid *pixels ) |
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| 96 | { |
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| 97 | GET_CURRENT_CONTEXT(ctx); |
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| 98 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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| 99 | |||
| 100 | if (width < 0 || height < 0) { |
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| 101 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 102 | "glReadPixels(width=%d height=%d)", width, height ); |
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| 103 | return; |
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| 104 | } |
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| 105 | |||
| 106 | if (!pixels) { |
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| 107 | _mesa_error( ctx, GL_INVALID_VALUE, "glReadPixels(pixels)" ); |
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| 108 | return; |
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| 109 | } |
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| 110 | |||
| 111 | if (ctx->NewState) |
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| 112 | _mesa_update_state(ctx); |
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| 113 | |||
| 114 | ctx->Driver.ReadPixels(ctx, x, y, width, height, |
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| 115 | format, type, &ctx->Pack, pixels); |
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| 116 | } |
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| 117 | |||
| 118 | |||
| 119 | |||
| 120 | void |
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| 121 | _mesa_CopyPixels( GLint srcx, GLint srcy, GLsizei width, GLsizei height, |
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| 122 | GLenum type ) |
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| 123 | { |
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| 124 | GET_CURRENT_CONTEXT(ctx); |
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| 125 | GLint destx, desty; |
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| 126 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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| 127 | |||
| 128 | if (width < 0 || height < 0) { |
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| 129 | _mesa_error( ctx, GL_INVALID_VALUE, "glCopyPixels(width or height < 0)" ); |
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| 130 | return; |
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| 131 | } |
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| 132 | |||
| 133 | if (ctx->NewState) { |
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| 134 | _mesa_update_state(ctx); |
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| 135 | } |
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| 136 | |||
| 137 | if (ctx->RenderMode==GL_RENDER) { |
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| 138 | /* Destination of copy: */ |
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| 139 | if (!ctx->Current.RasterPosValid) { |
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| 140 | return; |
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| 141 | } |
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| 142 | |||
| 143 | /* Round, to satisfy conformance tests (matches SGI's OpenGL) */ |
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| 144 | destx = IROUND(ctx->Current.RasterPos[0]); |
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| 145 | desty = IROUND(ctx->Current.RasterPos[1]); |
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| 146 | |||
| 147 | ctx->OcclusionResult = GL_TRUE; |
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| 148 | |||
| 149 | ctx->Driver.CopyPixels( ctx, srcx, srcy, width, height, destx, desty, |
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| 150 | type ); |
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| 151 | } |
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| 152 | else if (ctx->RenderMode == GL_FEEDBACK) { |
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| 153 | if (ctx->Current.RasterPosValid) { |
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| 154 | FLUSH_CURRENT( ctx, 0 ); |
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| 155 | FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_COPY_PIXEL_TOKEN ); |
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| 156 | _mesa_feedback_vertex( ctx, |
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| 157 | ctx->Current.RasterPos, |
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| 158 | ctx->Current.RasterColor, |
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| 159 | ctx->Current.RasterIndex, |
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| 160 | ctx->Current.RasterTexCoords[0] ); |
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| 161 | } |
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| 162 | } |
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| 163 | else if (ctx->RenderMode == GL_SELECT) { |
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| 164 | _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); |
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| 165 | } |
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| 166 | } |
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| 167 | |||
| 168 | |||
| 169 | |||
| 170 | void |
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| 171 | _mesa_Bitmap( GLsizei width, GLsizei height, |
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| 172 | GLfloat xorig, GLfloat yorig, GLfloat xmove, GLfloat ymove, |
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| 173 | const GLubyte *bitmap ) |
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| 174 | { |
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| 175 | GET_CURRENT_CONTEXT(ctx); |
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| 176 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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| 177 | |||
| 178 | if (width < 0 || height < 0) { |
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| 179 | _mesa_error( ctx, GL_INVALID_VALUE, "glBitmap(width or height < 0)" ); |
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| 180 | return; |
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| 181 | } |
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| 182 | |||
| 183 | if (ctx->Current.RasterPosValid == GL_FALSE) { |
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| 184 | return; /* do nothing */ |
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| 185 | } |
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| 186 | |||
| 187 | if (ctx->RenderMode==GL_RENDER) { |
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| 188 | if (bitmap) { |
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| 189 | /* Truncate, to satisfy conformance tests (matches SGI's OpenGL). */ |
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| 190 | GLint x = IFLOOR(ctx->Current.RasterPos[0] - xorig); |
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| 191 | GLint y = IFLOOR(ctx->Current.RasterPos[1] - yorig); |
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| 192 | |||
| 193 | if (ctx->NewState) { |
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| 194 | _mesa_update_state(ctx); |
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| 195 | } |
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| 196 | |||
| 197 | ctx->OcclusionResult = GL_TRUE; |
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| 198 | ctx->Driver.Bitmap( ctx, x, y, width, height, &ctx->Unpack, bitmap ); |
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| 199 | } |
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| 200 | } |
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| 201 | else if (ctx->RenderMode==GL_FEEDBACK) { |
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| 202 | if (ctx->Current.RasterPosValid) { |
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| 203 | FLUSH_CURRENT(ctx, 0); |
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| 204 | FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_BITMAP_TOKEN ); |
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| 205 | _mesa_feedback_vertex( ctx, |
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| 206 | ctx->Current.RasterPos, |
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| 207 | ctx->Current.RasterColor, |
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| 208 | ctx->Current.RasterIndex, |
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| 209 | ctx->Current.RasterTexCoords[0] ); |
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| 210 | } |
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| 211 | } |
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| 212 | else if (ctx->RenderMode==GL_SELECT) { |
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| 213 | /* Bitmaps don't generate selection hits. See appendix B of 1.1 spec. */ |
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| 214 | } |
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| 215 | |||
| 216 | /* update raster position */ |
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| 217 | ctx->Current.RasterPos[0] += xmove; |
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| 218 | ctx->Current.RasterPos[1] += ymove; |
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| 219 | } |
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| 220 | |||
| 221 | |||
| 222 | |||
| 223 | #if 0 /* experimental */ |
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| 224 | /* |
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| 225 | * Execute glDrawDepthPixelsMESA(). This function accepts both a color |
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| 226 | * image and depth (Z) image. Rasterization produces fragments with |
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| 227 | * color and Z taken from these images. This function is intended for |
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| 228 | * Z-compositing. Normally, this operation requires two glDrawPixels |
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| 229 | * calls with stencil testing. |
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| 230 | */ |
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| 231 | void |
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| 232 | _mesa_DrawDepthPixelsMESA( GLsizei width, GLsizei height, |
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| 233 | GLenum colorFormat, GLenum colorType, |
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| 234 | const GLvoid *colors, |
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| 235 | GLenum depthType, const GLvoid *depths ) |
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| 236 | { |
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| 237 | GET_CURRENT_CONTEXT(ctx); |
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| 238 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
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| 239 | |||
| 240 | if (width < 0 || height < 0) { |
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| 241 | _mesa_error( ctx, GL_INVALID_VALUE, |
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| 242 | "glDrawDepthPixelsMESA(width or height < 0" ); |
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| 243 | return; |
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| 244 | } |
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| 245 | |||
| 246 | if (ctx->RenderMode==GL_RENDER) { |
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| 247 | GLint x, y; |
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| 248 | if (!colors || !depths || !ctx->Current.RasterPosValid) { |
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| 249 | return; |
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| 250 | } |
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| 251 | |||
| 252 | if (ctx->NewState) { |
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| 253 | _mesa_update_state(ctx); |
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| 254 | } |
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| 255 | |||
| 256 | /* Round, to satisfy conformance tests (matches SGI's OpenGL) */ |
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| 257 | x = IROUND(ctx->Current.RasterPos[0]); |
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| 258 | y = IROUND(ctx->Current.RasterPos[1]); |
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| 259 | |||
| 260 | ctx->OcclusionResult = GL_TRUE; |
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| 261 | ctx->Driver.DrawDepthPixelsMESA(ctx, x, y, width, height, |
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| 262 | colorFormat, colorType, colors, |
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| 263 | depthType, depths, &ctx->Unpack); |
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| 264 | } |
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| 265 | else if (ctx->RenderMode==GL_FEEDBACK) { |
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| 266 | /* Feedback the current raster pos info */ |
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| 267 | if (ctx->Current.RasterPosValid) { |
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| 268 | FLUSH_CURRENT( ctx, 0 ); |
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| 269 | FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_DRAW_PIXEL_TOKEN ); |
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| 270 | _mesa_feedback_vertex( ctx, |
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| 271 | ctx->Current.RasterPos, |
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| 272 | ctx->Current.RasterColor, |
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| 273 | ctx->Current.RasterIndex, |
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| 274 | ctx->Current.RasterTexCoords[0] ); |
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| 275 | } |
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| 276 | } |
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| 277 | else if (ctx->RenderMode==GL_SELECT) { |
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| 278 | if (ctx->Current.RasterPosValid) { |
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| 279 | _mesa_update_hitflag( ctx, ctx->Current.RasterPos[2] ); |
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| 280 | } |
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| 281 | } |
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| 282 | } |
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| 283 | |||
| 284 | #endif |