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| Rev | Author | Line No. | Line |
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| 57 | pj | 1 | /* $Id: s_copypix.c,v 1.1 2003-02-28 11:49:41 pj Exp $ */ |
| 2 | |||
| 3 | /* |
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| 4 | * Mesa 3-D graphics library |
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| 5 | * Version: 5.0 |
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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 | |||
| 28 | #include "glheader.h" |
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| 29 | #include "colormac.h" |
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| 30 | #include "context.h" |
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| 31 | #include "convolve.h" |
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| 32 | #include "feedback.h" |
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| 33 | #include "macros.h" |
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| 34 | #include "imports.h" |
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| 35 | #include "mmath.h" |
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| 36 | #include "pixel.h" |
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| 37 | |||
| 38 | #include "s_context.h" |
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| 39 | #include "s_depth.h" |
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| 40 | #include "s_histogram.h" |
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| 41 | #include "s_pixeltex.h" |
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| 42 | #include "s_span.h" |
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| 43 | #include "s_stencil.h" |
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| 44 | #include "s_texture.h" |
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| 45 | #include "s_zoom.h" |
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| 46 | |||
| 47 | |||
| 48 | |||
| 49 | /* |
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| 50 | * Determine if there's overlap in an image copy. |
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| 51 | * This test also compensates for the fact that copies are done from |
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| 52 | * bottom to top and overlaps can sometimes be handled correctly |
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| 53 | * without making a temporary image copy. |
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| 54 | */ |
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| 55 | static GLboolean |
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| 56 | regions_overlap(GLint srcx, GLint srcy, |
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| 57 | GLint dstx, GLint dsty, |
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| 58 | GLint width, GLint height, |
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| 59 | GLfloat zoomX, GLfloat zoomY) |
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| 60 | { |
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| 61 | if (zoomX == 1.0 && zoomY == 1.0) { |
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| 62 | /* no zoom */ |
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| 63 | if (srcx >= dstx + width || (srcx + width <= dstx)) { |
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| 64 | return GL_FALSE; |
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| 65 | } |
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| 66 | else if (srcy < dsty) { /* this is OK */ |
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| 67 | return GL_FALSE; |
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| 68 | } |
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| 69 | else if (srcy > dsty + height) { |
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| 70 | return GL_FALSE; |
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| 71 | } |
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| 72 | else { |
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| 73 | return GL_TRUE; |
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| 74 | } |
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| 75 | } |
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| 76 | else { |
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| 77 | /* add one pixel of slop when zooming, just to be safe */ |
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| 78 | if ((srcx > dstx + (width * zoomX) + 1) || (srcx + width + 1 < dstx)) { |
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| 79 | return GL_FALSE; |
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| 80 | } |
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| 81 | else if ((srcy < dsty) && (srcy + height < dsty + (height * zoomY))) { |
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| 82 | return GL_FALSE; |
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| 83 | } |
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| 84 | else if ((srcy > dsty) && (srcy + height > dsty + (height * zoomY))) { |
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| 85 | return GL_FALSE; |
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| 86 | } |
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| 87 | else { |
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| 88 | return GL_TRUE; |
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| 89 | } |
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| 90 | } |
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| 91 | } |
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| 92 | |||
| 93 | |||
| 94 | |||
| 95 | /* |
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| 96 | * RGBA copypixels with convolution. |
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| 97 | */ |
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| 98 | static void |
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| 99 | copy_conv_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy, |
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| 100 | GLint width, GLint height, GLint destx, GLint desty) |
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| 101 | { |
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| 102 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
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| 103 | GLboolean quick_draw; |
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| 104 | GLint row; |
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| 105 | GLboolean changeBuffer; |
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| 106 | const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; |
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| 107 | const GLuint transferOps = ctx->_ImageTransferState; |
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| 108 | GLfloat *dest, *tmpImage, *convImage; |
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| 109 | struct sw_span span; |
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| 110 | |||
| 111 | INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA); |
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| 112 | |||
| 113 | if (ctx->Depth.Test) |
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| 114 | _mesa_span_default_z(ctx, &span); |
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| 115 | if (ctx->Fog.Enabled) |
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| 116 | _mesa_span_default_fog(ctx, &span); |
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| 117 | |||
| 118 | |||
| 119 | if (SWRAST_CONTEXT(ctx)->_RasterMask == 0 |
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| 120 | && !zoom |
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| 121 | && destx >= 0 |
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| 122 | && destx + width <= (GLint) ctx->DrawBuffer->Width) { |
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| 123 | quick_draw = GL_TRUE; |
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| 124 | } |
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| 125 | else { |
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| 126 | quick_draw = GL_FALSE; |
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| 127 | } |
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| 128 | |||
| 129 | /* If read and draw buffer are different we must do buffer switching */ |
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| 130 | changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer |
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| 131 | || ctx->DrawBuffer != ctx->ReadBuffer; |
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| 132 | |||
| 133 | |||
| 134 | /* allocate space for GLfloat image */ |
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| 135 | tmpImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat)); |
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| 136 | if (!tmpImage) { |
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| 137 | _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels"); |
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| 138 | return; |
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| 139 | } |
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| 140 | convImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat)); |
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| 141 | if (!convImage) { |
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| 142 | FREE(tmpImage); |
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| 143 | _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyPixels"); |
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| 144 | return; |
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| 145 | } |
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| 146 | |||
| 147 | dest = tmpImage; |
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| 148 | |||
| 149 | if (changeBuffer) { |
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| 150 | /* choose the read buffer */ |
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| 151 | _swrast_use_read_buffer(ctx); |
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| 152 | } |
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| 153 | |||
| 154 | /* read source image */ |
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| 155 | dest = tmpImage; |
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| 156 | for (row = 0; row < height; row++) { |
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| 157 | GLchan rgba[MAX_WIDTH][4]; |
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| 158 | GLint i; |
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| 159 | _mesa_read_rgba_span(ctx, ctx->ReadBuffer, width, srcx, srcy + row, rgba); |
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| 160 | /* convert GLchan to GLfloat */ |
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| 161 | for (i = 0; i < width; i++) { |
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| 162 | *dest++ = (GLfloat) rgba[i][RCOMP] * (1.0F / CHAN_MAXF); |
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| 163 | *dest++ = (GLfloat) rgba[i][GCOMP] * (1.0F / CHAN_MAXF); |
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| 164 | *dest++ = (GLfloat) rgba[i][BCOMP] * (1.0F / CHAN_MAXF); |
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| 165 | *dest++ = (GLfloat) rgba[i][ACOMP] * (1.0F / CHAN_MAXF); |
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| 166 | } |
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| 167 | } |
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| 168 | |||
| 169 | if (changeBuffer) { |
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| 170 | /* restore default src/dst buffer */ |
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| 171 | _swrast_use_draw_buffer(ctx); |
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| 172 | } |
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| 173 | |||
| 174 | /* do image transfer ops up until convolution */ |
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| 175 | for (row = 0; row < height; row++) { |
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| 176 | GLfloat (*rgba)[4] = (GLfloat (*)[4]) (tmpImage + row * width * 4); |
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| 177 | |||
| 178 | /* scale & bias */ |
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| 179 | if (transferOps & IMAGE_SCALE_BIAS_BIT) { |
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| 180 | _mesa_scale_and_bias_rgba(ctx, width, rgba, |
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| 181 | ctx->Pixel.RedScale, ctx->Pixel.GreenScale, |
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| 182 | ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale, |
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| 183 | ctx->Pixel.RedBias, ctx->Pixel.GreenBias, |
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| 184 | ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias); |
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| 185 | } |
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| 186 | /* color map lookup */ |
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| 187 | if (transferOps & IMAGE_MAP_COLOR_BIT) { |
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| 188 | _mesa_map_rgba(ctx, width, rgba); |
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| 189 | } |
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| 190 | /* GL_COLOR_TABLE lookup */ |
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| 191 | if (transferOps & IMAGE_COLOR_TABLE_BIT) { |
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| 192 | _mesa_lookup_rgba(&ctx->ColorTable, width, rgba); |
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| 193 | } |
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| 194 | } |
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| 195 | |||
| 196 | /* do convolution */ |
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| 197 | if (ctx->Pixel.Convolution2DEnabled) { |
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| 198 | _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage); |
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| 199 | } |
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| 200 | else { |
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| 201 | ASSERT(ctx->Pixel.Separable2DEnabled); |
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| 202 | _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage); |
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| 203 | } |
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| 204 | FREE(tmpImage); |
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| 205 | |||
| 206 | /* do remaining image transfer ops */ |
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| 207 | for (row = 0; row < height; row++) { |
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| 208 | GLfloat (*rgba)[4] = (GLfloat (*)[4]) (convImage + row * width * 4); |
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| 209 | |||
| 210 | /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */ |
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| 211 | if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) { |
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| 212 | _mesa_lookup_rgba(&ctx->PostConvolutionColorTable, width, rgba); |
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| 213 | } |
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| 214 | /* color matrix */ |
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| 215 | if (transferOps & IMAGE_COLOR_MATRIX_BIT) { |
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| 216 | _mesa_transform_rgba(ctx, width, rgba); |
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| 217 | } |
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| 218 | /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */ |
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| 219 | if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) { |
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| 220 | _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, width, rgba); |
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| 221 | } |
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| 222 | /* update histogram count */ |
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| 223 | if (transferOps & IMAGE_HISTOGRAM_BIT) { |
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| 224 | _mesa_update_histogram(ctx, width, (CONST GLfloat (*)[4]) rgba); |
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| 225 | } |
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| 226 | /* update min/max */ |
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| 227 | if (transferOps & IMAGE_MIN_MAX_BIT) { |
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| 228 | _mesa_update_minmax(ctx, width, (CONST GLfloat (*)[4]) rgba); |
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| 229 | } |
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| 230 | } |
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| 231 | |||
| 232 | for (row = 0; row < height; row++) { |
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| 233 | const GLfloat *src = convImage + row * width * 4; |
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| 234 | GLint i, dy; |
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| 235 | |||
| 236 | /* clamp to [0,1] and convert float back to chan */ |
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| 237 | for (i = 0; i < width; i++) { |
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| 238 | GLint r = (GLint) (src[i * 4 + RCOMP] * CHAN_MAXF); |
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| 239 | GLint g = (GLint) (src[i * 4 + GCOMP] * CHAN_MAXF); |
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| 240 | GLint b = (GLint) (src[i * 4 + BCOMP] * CHAN_MAXF); |
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| 241 | GLint a = (GLint) (src[i * 4 + ACOMP] * CHAN_MAXF); |
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| 242 | span.array->rgba[i][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); |
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| 243 | span.array->rgba[i][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); |
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| 244 | span.array->rgba[i][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); |
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| 245 | span.array->rgba[i][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); |
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| 246 | } |
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| 247 | |||
| 248 | if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) { |
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| 249 | span.end = width; |
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| 250 | _swrast_pixel_texture(ctx, &span); |
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| 251 | } |
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| 252 | |||
| 253 | /* write row to framebuffer */ |
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| 254 | |||
| 255 | dy = desty + row; |
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| 256 | if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) { |
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| 257 | (*swrast->Driver.WriteRGBASpan)( ctx, width, destx, dy, |
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| 258 | (const GLchan (*)[4])span.array->rgba, NULL ); |
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| 259 | } |
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| 260 | else if (zoom) { |
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| 261 | span.x = destx; |
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| 262 | span.y = dy; |
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| 263 | span.end = width; |
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| 264 | _mesa_write_zoomed_rgba_span(ctx, &span, |
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| 265 | (CONST GLchan (*)[4])span.array->rgba, |
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| 266 | desty); |
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| 267 | } |
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| 268 | else { |
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| 269 | span.x = destx; |
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| 270 | span.y = dy; |
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| 271 | span.end = width; |
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| 272 | _mesa_write_rgba_span(ctx, &span); |
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| 273 | } |
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| 274 | } |
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| 275 | |||
| 276 | FREE(convImage); |
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| 277 | } |
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| 278 | |||
| 279 | |||
| 280 | /* |
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| 281 | * RGBA copypixels |
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| 282 | */ |
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| 283 | static void |
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| 284 | copy_rgba_pixels(GLcontext *ctx, GLint srcx, GLint srcy, |
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| 285 | GLint width, GLint height, GLint destx, GLint desty) |
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| 286 | { |
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| 287 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
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| 288 | GLchan *tmpImage,*p; |
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| 289 | GLboolean quick_draw; |
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| 290 | GLint sy, dy, stepy, j; |
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| 291 | GLboolean changeBuffer; |
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| 292 | const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; |
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| 293 | GLint overlapping; |
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| 294 | const GLuint transferOps = ctx->_ImageTransferState; |
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| 295 | struct sw_span span; |
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| 296 | |||
| 297 | INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA); |
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| 298 | |||
| 299 | if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) { |
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| 300 | copy_conv_rgba_pixels(ctx, srcx, srcy, width, height, destx, desty); |
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| 301 | return; |
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| 302 | } |
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| 303 | |||
| 304 | /* Determine if copy should be done bottom-to-top or top-to-bottom */ |
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| 305 | if (srcy < desty) { |
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| 306 | /* top-down max-to-min */ |
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| 307 | sy = srcy + height - 1; |
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| 308 | dy = desty + height - 1; |
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| 309 | stepy = -1; |
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| 310 | } |
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| 311 | else { |
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| 312 | /* bottom-up min-to-max */ |
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| 313 | sy = srcy; |
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| 314 | dy = desty; |
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| 315 | stepy = 1; |
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| 316 | } |
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| 317 | |||
| 318 | overlapping = regions_overlap(srcx, srcy, destx, desty, width, height, |
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| 319 | ctx->Pixel.ZoomX, ctx->Pixel.ZoomY); |
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| 320 | |||
| 321 | if (ctx->Depth.Test) |
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| 322 | _mesa_span_default_z(ctx, &span); |
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| 323 | if (ctx->Fog.Enabled) |
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| 324 | _mesa_span_default_fog(ctx, &span); |
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| 325 | |||
| 326 | if (SWRAST_CONTEXT(ctx)->_RasterMask == 0 |
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| 327 | && !zoom |
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| 328 | && destx >= 0 |
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| 329 | && destx + width <= (GLint) ctx->DrawBuffer->Width) { |
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| 330 | quick_draw = GL_TRUE; |
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| 331 | } |
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| 332 | else { |
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| 333 | quick_draw = GL_FALSE; |
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| 334 | } |
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| 335 | |||
| 336 | /* If read and draw buffer are different we must do buffer switching */ |
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| 337 | changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer |
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| 338 | || ctx->DrawBuffer != ctx->ReadBuffer; |
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| 339 | |||
| 340 | if (overlapping) { |
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| 341 | GLint ssy = sy; |
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| 342 | tmpImage = (GLchan *) MALLOC(width * height * sizeof(GLchan) * 4); |
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| 343 | if (!tmpImage) { |
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| 344 | _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" ); |
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| 345 | return; |
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| 346 | } |
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| 347 | /* setup source */ |
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| 348 | if (changeBuffer) |
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| 349 | _swrast_use_read_buffer(ctx); |
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| 350 | /* read the source image */ |
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| 351 | p = tmpImage; |
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| 352 | for (j = 0; j < height; j++, ssy += stepy) { |
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| 353 | _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, srcx, ssy, |
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| 354 | (GLchan (*)[4]) p ); |
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| 355 | p += width * 4; |
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| 356 | } |
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| 357 | p = tmpImage; |
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| 358 | /* restore dest */ |
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| 359 | if (changeBuffer) { |
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| 360 | _swrast_use_draw_buffer(ctx); |
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| 361 | changeBuffer = GL_FALSE; |
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| 362 | } |
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| 363 | } |
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| 364 | else { |
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| 365 | tmpImage = NULL; /* silence compiler warnings */ |
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| 366 | p = NULL; |
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| 367 | } |
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| 368 | |||
| 369 | for (j = 0; j < height; j++, sy += stepy, dy += stepy) { |
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| 370 | /* Get source pixels */ |
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| 371 | if (overlapping) { |
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| 372 | /* get from buffered image */ |
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| 373 | MEMCPY(span.array->rgba, p, width * sizeof(GLchan) * 4); |
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| 374 | p += width * 4; |
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| 375 | } |
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| 376 | else { |
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| 377 | /* get from framebuffer */ |
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| 378 | if (changeBuffer) |
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| 379 | _swrast_use_read_buffer(ctx); |
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| 380 | _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, srcx, sy, |
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| 381 | span.array->rgba ); |
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| 382 | if (changeBuffer) |
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| 383 | _swrast_use_draw_buffer(ctx); |
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| 384 | } |
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| 385 | |||
| 386 | if (transferOps) { |
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| 387 | const GLfloat scale = (1.0F / CHAN_MAXF); |
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| 388 | GLint k; |
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| 389 | DEFMARRAY(GLfloat, rgbaFloat, MAX_WIDTH, 4); /* mac 32k limitation */ |
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| 390 | CHECKARRAY(rgbaFloat, return); |
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| 391 | |||
| 392 | /* convert chan to float */ |
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| 393 | for (k = 0; k < width; k++) { |
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| 394 | rgbaFloat[k][RCOMP] = (GLfloat) span.array->rgba[k][RCOMP] * scale; |
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| 395 | rgbaFloat[k][GCOMP] = (GLfloat) span.array->rgba[k][GCOMP] * scale; |
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| 396 | rgbaFloat[k][BCOMP] = (GLfloat) span.array->rgba[k][BCOMP] * scale; |
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| 397 | rgbaFloat[k][ACOMP] = (GLfloat) span.array->rgba[k][ACOMP] * scale; |
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| 398 | } |
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| 399 | /* scale & bias */ |
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| 400 | if (transferOps & IMAGE_SCALE_BIAS_BIT) { |
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| 401 | _mesa_scale_and_bias_rgba(ctx, width, rgbaFloat, |
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| 402 | ctx->Pixel.RedScale, ctx->Pixel.GreenScale, |
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| 403 | ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale, |
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| 404 | ctx->Pixel.RedBias, ctx->Pixel.GreenBias, |
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| 405 | ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias); |
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| 406 | } |
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| 407 | /* color map lookup */ |
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| 408 | if (transferOps & IMAGE_MAP_COLOR_BIT) { |
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| 409 | _mesa_map_rgba(ctx, width, rgbaFloat); |
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| 410 | } |
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| 411 | /* GL_COLOR_TABLE lookup */ |
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| 412 | if (transferOps & IMAGE_COLOR_TABLE_BIT) { |
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| 413 | _mesa_lookup_rgba(&ctx->ColorTable, width, rgbaFloat); |
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| 414 | } |
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| 415 | /* convolution */ |
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| 416 | if (transferOps & IMAGE_CONVOLUTION_BIT) { |
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| 417 | _mesa_problem(ctx, "Convolution should not be enabled in copy_rgba_pixels()"); |
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| 418 | return; |
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| 419 | } |
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| 420 | /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */ |
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| 421 | if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) { |
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| 422 | _mesa_scale_and_bias_rgba(ctx, width, rgbaFloat, |
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| 423 | ctx->Pixel.PostConvolutionScale[RCOMP], |
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| 424 | ctx->Pixel.PostConvolutionScale[GCOMP], |
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| 425 | ctx->Pixel.PostConvolutionScale[BCOMP], |
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| 426 | ctx->Pixel.PostConvolutionScale[ACOMP], |
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| 427 | ctx->Pixel.PostConvolutionBias[RCOMP], |
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| 428 | ctx->Pixel.PostConvolutionBias[GCOMP], |
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| 429 | ctx->Pixel.PostConvolutionBias[BCOMP], |
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| 430 | ctx->Pixel.PostConvolutionBias[ACOMP]); |
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| 431 | } |
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| 432 | /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */ |
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| 433 | if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) { |
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| 434 | _mesa_lookup_rgba(&ctx->PostConvolutionColorTable, width, rgbaFloat); |
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| 435 | } |
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| 436 | /* color matrix */ |
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| 437 | if (transferOps & IMAGE_COLOR_MATRIX_BIT) { |
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| 438 | _mesa_transform_rgba(ctx, width, rgbaFloat); |
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| 439 | } |
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| 440 | /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */ |
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| 441 | if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) { |
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| 442 | _mesa_lookup_rgba(&ctx->PostColorMatrixColorTable, width, rgbaFloat); |
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| 443 | } |
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| 444 | /* update histogram count */ |
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| 445 | if (transferOps & IMAGE_HISTOGRAM_BIT) { |
||
| 446 | _mesa_update_histogram(ctx, width, (CONST GLfloat (*)[4]) rgbaFloat); |
||
| 447 | } |
||
| 448 | /* update min/max */ |
||
| 449 | if (transferOps & IMAGE_MIN_MAX_BIT) { |
||
| 450 | _mesa_update_minmax(ctx, width, (CONST GLfloat (*)[4]) rgbaFloat); |
||
| 451 | } |
||
| 452 | /* clamp to [0,1] and convert float back to chan */ |
||
| 453 | for (k = 0; k < width; k++) { |
||
| 454 | GLint r = (GLint) (rgbaFloat[k][RCOMP] * CHAN_MAXF); |
||
| 455 | GLint g = (GLint) (rgbaFloat[k][GCOMP] * CHAN_MAXF); |
||
| 456 | GLint b = (GLint) (rgbaFloat[k][BCOMP] * CHAN_MAXF); |
||
| 457 | GLint a = (GLint) (rgbaFloat[k][ACOMP] * CHAN_MAXF); |
||
| 458 | span.array->rgba[k][RCOMP] = (GLchan) CLAMP(r, 0, CHAN_MAX); |
||
| 459 | span.array->rgba[k][GCOMP] = (GLchan) CLAMP(g, 0, CHAN_MAX); |
||
| 460 | span.array->rgba[k][BCOMP] = (GLchan) CLAMP(b, 0, CHAN_MAX); |
||
| 461 | span.array->rgba[k][ACOMP] = (GLchan) CLAMP(a, 0, CHAN_MAX); |
||
| 462 | } |
||
| 463 | UNDEFARRAY(rgbaFloat); /* mac 32k limitation */ |
||
| 464 | } |
||
| 465 | |||
| 466 | if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) { |
||
| 467 | span.end = width; |
||
| 468 | _swrast_pixel_texture(ctx, &span); |
||
| 469 | } |
||
| 470 | |||
| 471 | if (quick_draw && dy >= 0 && dy < (GLint) ctx->DrawBuffer->Height) { |
||
| 472 | (*swrast->Driver.WriteRGBASpan)( ctx, width, destx, dy, |
||
| 473 | (const GLchan (*)[4])span.array->rgba, NULL ); |
||
| 474 | } |
||
| 475 | else if (zoom) { |
||
| 476 | span.x = destx; |
||
| 477 | span.y = dy; |
||
| 478 | span.end = width; |
||
| 479 | _mesa_write_zoomed_rgba_span(ctx, &span, |
||
| 480 | (CONST GLchan (*)[4]) span.array->rgba, |
||
| 481 | desty); |
||
| 482 | } |
||
| 483 | else { |
||
| 484 | span.x = destx; |
||
| 485 | span.y = dy; |
||
| 486 | span.end = width; |
||
| 487 | _mesa_write_rgba_span(ctx, &span); |
||
| 488 | } |
||
| 489 | } |
||
| 490 | |||
| 491 | if (overlapping) |
||
| 492 | FREE(tmpImage); |
||
| 493 | } |
||
| 494 | |||
| 495 | |||
| 496 | static void copy_ci_pixels( GLcontext *ctx, |
||
| 497 | GLint srcx, GLint srcy, GLint width, GLint height, |
||
| 498 | GLint destx, GLint desty ) |
||
| 499 | { |
||
| 500 | GLuint *tmpImage,*p; |
||
| 501 | GLint sy, dy, stepy; |
||
| 502 | GLint j; |
||
| 503 | GLboolean changeBuffer; |
||
| 504 | const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; |
||
| 505 | const GLboolean shift_or_offset = ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset; |
||
| 506 | GLint overlapping; |
||
| 507 | struct sw_span span; |
||
| 508 | |||
| 509 | INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX); |
||
| 510 | |||
| 511 | /* Determine if copy should be bottom-to-top or top-to-bottom */ |
||
| 512 | if (srcy<desty) { |
||
| 513 | /* top-down max-to-min */ |
||
| 514 | sy = srcy + height - 1; |
||
| 515 | dy = desty + height - 1; |
||
| 516 | stepy = -1; |
||
| 517 | } |
||
| 518 | else { |
||
| 519 | /* bottom-up min-to-max */ |
||
| 520 | sy = srcy; |
||
| 521 | dy = desty; |
||
| 522 | stepy = 1; |
||
| 523 | } |
||
| 524 | |||
| 525 | overlapping = regions_overlap(srcx, srcy, destx, desty, width, height, |
||
| 526 | ctx->Pixel.ZoomX, ctx->Pixel.ZoomY); |
||
| 527 | |||
| 528 | if (ctx->Depth.Test) |
||
| 529 | _mesa_span_default_z(ctx, &span); |
||
| 530 | if (ctx->Fog.Enabled) |
||
| 531 | _mesa_span_default_fog(ctx, &span); |
||
| 532 | |||
| 533 | /* If read and draw buffer are different we must do buffer switching */ |
||
| 534 | changeBuffer = ctx->Pixel.ReadBuffer != ctx->Color.DrawBuffer |
||
| 535 | || ctx->DrawBuffer != ctx->ReadBuffer; |
||
| 536 | |||
| 537 | if (overlapping) { |
||
| 538 | GLint ssy = sy; |
||
| 539 | tmpImage = (GLuint *) MALLOC(width * height * sizeof(GLuint)); |
||
| 540 | if (!tmpImage) { |
||
| 541 | _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" ); |
||
| 542 | return; |
||
| 543 | } |
||
| 544 | /* setup source */ |
||
| 545 | if (changeBuffer) |
||
| 546 | _swrast_use_read_buffer(ctx); |
||
| 547 | /* read the image */ |
||
| 548 | p = tmpImage; |
||
| 549 | for (j = 0; j < height; j++, ssy += stepy) { |
||
| 550 | _mesa_read_index_span( ctx, ctx->ReadBuffer, width, srcx, ssy, p ); |
||
| 551 | p += width; |
||
| 552 | } |
||
| 553 | p = tmpImage; |
||
| 554 | /* restore to draw buffer */ |
||
| 555 | if (changeBuffer) { |
||
| 556 | _swrast_use_draw_buffer(ctx); |
||
| 557 | changeBuffer = GL_FALSE; |
||
| 558 | } |
||
| 559 | } |
||
| 560 | else { |
||
| 561 | tmpImage = NULL; /* silence compiler warning */ |
||
| 562 | p = NULL; |
||
| 563 | } |
||
| 564 | |||
| 565 | for (j = 0; j < height; j++, sy += stepy, dy += stepy) { |
||
| 566 | if (overlapping) { |
||
| 567 | MEMCPY(span.array->index, p, width * sizeof(GLuint)); |
||
| 568 | p += width; |
||
| 569 | } |
||
| 570 | else { |
||
| 571 | if (changeBuffer) |
||
| 572 | _swrast_use_read_buffer(ctx); |
||
| 573 | _mesa_read_index_span( ctx, ctx->ReadBuffer, width, srcx, sy, |
||
| 574 | span.array->index ); |
||
| 575 | if (changeBuffer) |
||
| 576 | _swrast_use_draw_buffer(ctx); |
||
| 577 | } |
||
| 578 | |||
| 579 | if (shift_or_offset) { |
||
| 580 | _mesa_shift_and_offset_ci( ctx, width, span.array->index ); |
||
| 581 | } |
||
| 582 | if (ctx->Pixel.MapColorFlag) { |
||
| 583 | _mesa_map_ci( ctx, width, span.array->index ); |
||
| 584 | } |
||
| 585 | |||
| 586 | span.x = destx; |
||
| 587 | span.y = dy; |
||
| 588 | span.end = width; |
||
| 589 | if (zoom) |
||
| 590 | _mesa_write_zoomed_index_span(ctx, &span, desty); |
||
| 591 | else |
||
| 592 | _mesa_write_index_span(ctx, &span); |
||
| 593 | } |
||
| 594 | |||
| 595 | if (overlapping) |
||
| 596 | FREE(tmpImage); |
||
| 597 | } |
||
| 598 | |||
| 599 | |||
| 600 | |||
| 601 | /* |
||
| 602 | * TODO: Optimize!!!! |
||
| 603 | */ |
||
| 604 | static void copy_depth_pixels( GLcontext *ctx, GLint srcx, GLint srcy, |
||
| 605 | GLint width, GLint height, |
||
| 606 | GLint destx, GLint desty ) |
||
| 607 | { |
||
| 608 | GLfloat depth[MAX_WIDTH]; |
||
| 609 | GLfloat *p, *tmpImage; |
||
| 610 | GLint sy, dy, stepy; |
||
| 611 | GLint i, j; |
||
| 612 | const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; |
||
| 613 | GLint overlapping; |
||
| 614 | struct sw_span span; |
||
| 615 | |||
| 616 | INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z); |
||
| 617 | |||
| 618 | if (!ctx->Visual.depthBits) { |
||
| 619 | _mesa_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" ); |
||
| 620 | return; |
||
| 621 | } |
||
| 622 | |||
| 623 | /* Determine if copy should be bottom-to-top or top-to-bottom */ |
||
| 624 | if (srcy<desty) { |
||
| 625 | /* top-down max-to-min */ |
||
| 626 | sy = srcy + height - 1; |
||
| 627 | dy = desty + height - 1; |
||
| 628 | stepy = -1; |
||
| 629 | } |
||
| 630 | else { |
||
| 631 | /* bottom-up min-to-max */ |
||
| 632 | sy = srcy; |
||
| 633 | dy = desty; |
||
| 634 | stepy = 1; |
||
| 635 | } |
||
| 636 | |||
| 637 | overlapping = regions_overlap(srcx, srcy, destx, desty, width, height, |
||
| 638 | ctx->Pixel.ZoomX, ctx->Pixel.ZoomY); |
||
| 639 | |||
| 640 | _mesa_span_default_color(ctx, &span); |
||
| 641 | if (ctx->Fog.Enabled) |
||
| 642 | _mesa_span_default_fog(ctx, &span); |
||
| 643 | |||
| 644 | if (overlapping) { |
||
| 645 | GLint ssy = sy; |
||
| 646 | tmpImage = (GLfloat *) MALLOC(width * height * sizeof(GLfloat)); |
||
| 647 | if (!tmpImage) { |
||
| 648 | _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" ); |
||
| 649 | return; |
||
| 650 | } |
||
| 651 | p = tmpImage; |
||
| 652 | for (j = 0; j < height; j++, ssy += stepy) { |
||
| 653 | _mesa_read_depth_span_float(ctx, width, srcx, ssy, p); |
||
| 654 | p += width; |
||
| 655 | } |
||
| 656 | p = tmpImage; |
||
| 657 | } |
||
| 658 | else { |
||
| 659 | tmpImage = NULL; /* silence compiler warning */ |
||
| 660 | p = NULL; |
||
| 661 | } |
||
| 662 | |||
| 663 | for (j = 0; j < height; j++, sy += stepy, dy += stepy) { |
||
| 664 | if (overlapping) { |
||
| 665 | MEMCPY(depth, p, width * sizeof(GLfloat)); |
||
| 666 | p += width; |
||
| 667 | } |
||
| 668 | else { |
||
| 669 | _mesa_read_depth_span_float(ctx, width, srcx, sy, depth); |
||
| 670 | } |
||
| 671 | |||
| 672 | for (i = 0; i < width; i++) { |
||
| 673 | GLfloat d = depth[i] * ctx->Pixel.DepthScale + ctx->Pixel.DepthBias; |
||
| 674 | span.array->z[i] = (GLdepth) (CLAMP(d, 0.0F, 1.0F) * ctx->DepthMax); |
||
| 675 | } |
||
| 676 | |||
| 677 | span.x = destx; |
||
| 678 | span.y = dy; |
||
| 679 | span.end = width; |
||
| 680 | if (ctx->Visual.rgbMode) { |
||
| 681 | if (zoom) |
||
| 682 | _mesa_write_zoomed_rgba_span( ctx, &span, |
||
| 683 | (const GLchan (*)[4])span.array->rgba, |
||
| 684 | desty ); |
||
| 685 | else |
||
| 686 | _mesa_write_rgba_span(ctx, &span); |
||
| 687 | } |
||
| 688 | else { |
||
| 689 | if (zoom) |
||
| 690 | _mesa_write_zoomed_index_span( ctx, &span, desty ); |
||
| 691 | else |
||
| 692 | _mesa_write_index_span(ctx, &span); |
||
| 693 | } |
||
| 694 | } |
||
| 695 | |||
| 696 | if (overlapping) |
||
| 697 | FREE(tmpImage); |
||
| 698 | } |
||
| 699 | |||
| 700 | |||
| 701 | |||
| 702 | static void copy_stencil_pixels( GLcontext *ctx, GLint srcx, GLint srcy, |
||
| 703 | GLint width, GLint height, |
||
| 704 | GLint destx, GLint desty ) |
||
| 705 | { |
||
| 706 | GLint sy, dy, stepy; |
||
| 707 | GLint j; |
||
| 708 | GLstencil *p, *tmpImage; |
||
| 709 | const GLboolean zoom = ctx->Pixel.ZoomX != 1.0F || ctx->Pixel.ZoomY != 1.0F; |
||
| 710 | const GLboolean shift_or_offset = ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset; |
||
| 711 | GLint overlapping; |
||
| 712 | |||
| 713 | if (!ctx->Visual.stencilBits) { |
||
| 714 | _mesa_error( ctx, GL_INVALID_OPERATION, "glCopyPixels" ); |
||
| 715 | return; |
||
| 716 | } |
||
| 717 | |||
| 718 | /* Determine if copy should be bottom-to-top or top-to-bottom */ |
||
| 719 | if (srcy < desty) { |
||
| 720 | /* top-down max-to-min */ |
||
| 721 | sy = srcy + height - 1; |
||
| 722 | dy = desty + height - 1; |
||
| 723 | stepy = -1; |
||
| 724 | } |
||
| 725 | else { |
||
| 726 | /* bottom-up min-to-max */ |
||
| 727 | sy = srcy; |
||
| 728 | dy = desty; |
||
| 729 | stepy = 1; |
||
| 730 | } |
||
| 731 | |||
| 732 | overlapping = regions_overlap(srcx, srcy, destx, desty, width, height, |
||
| 733 | ctx->Pixel.ZoomX, ctx->Pixel.ZoomY); |
||
| 734 | |||
| 735 | if (overlapping) { |
||
| 736 | GLint ssy = sy; |
||
| 737 | tmpImage = (GLstencil *) MALLOC(width * height * sizeof(GLstencil)); |
||
| 738 | if (!tmpImage) { |
||
| 739 | _mesa_error( ctx, GL_OUT_OF_MEMORY, "glCopyPixels" ); |
||
| 740 | return; |
||
| 741 | } |
||
| 742 | p = tmpImage; |
||
| 743 | for (j = 0; j < height; j++, ssy += stepy) { |
||
| 744 | _mesa_read_stencil_span( ctx, width, srcx, ssy, p ); |
||
| 745 | p += width; |
||
| 746 | } |
||
| 747 | p = tmpImage; |
||
| 748 | } |
||
| 749 | else { |
||
| 750 | tmpImage = NULL; /* silence compiler warning */ |
||
| 751 | p = NULL; |
||
| 752 | } |
||
| 753 | |||
| 754 | for (j = 0; j < height; j++, sy += stepy, dy += stepy) { |
||
| 755 | GLstencil stencil[MAX_WIDTH]; |
||
| 756 | |||
| 757 | if (overlapping) { |
||
| 758 | MEMCPY(stencil, p, width * sizeof(GLstencil)); |
||
| 759 | p += width; |
||
| 760 | } |
||
| 761 | else { |
||
| 762 | _mesa_read_stencil_span( ctx, width, srcx, sy, stencil ); |
||
| 763 | } |
||
| 764 | |||
| 765 | if (shift_or_offset) { |
||
| 766 | _mesa_shift_and_offset_stencil( ctx, width, stencil ); |
||
| 767 | } |
||
| 768 | if (ctx->Pixel.MapStencilFlag) { |
||
| 769 | _mesa_map_stencil( ctx, width, stencil ); |
||
| 770 | } |
||
| 771 | |||
| 772 | if (zoom) { |
||
| 773 | _mesa_write_zoomed_stencil_span( ctx, width, destx, dy, stencil, desty ); |
||
| 774 | } |
||
| 775 | else { |
||
| 776 | _mesa_write_stencil_span( ctx, width, destx, dy, stencil ); |
||
| 777 | } |
||
| 778 | } |
||
| 779 | |||
| 780 | if (overlapping) |
||
| 781 | FREE(tmpImage); |
||
| 782 | } |
||
| 783 | |||
| 784 | |||
| 785 | |||
| 786 | |||
| 787 | void |
||
| 788 | _swrast_CopyPixels( GLcontext *ctx, |
||
| 789 | GLint srcx, GLint srcy, GLsizei width, GLsizei height, |
||
| 790 | GLint destx, GLint desty, |
||
| 791 | GLenum type ) |
||
| 792 | { |
||
| 793 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
||
| 794 | RENDER_START(swrast,ctx); |
||
| 795 | |||
| 796 | if (swrast->NewState) |
||
| 797 | _swrast_validate_derived( ctx ); |
||
| 798 | |||
| 799 | if (type == GL_COLOR && ctx->Visual.rgbMode) { |
||
| 800 | copy_rgba_pixels( ctx, srcx, srcy, width, height, destx, desty ); |
||
| 801 | } |
||
| 802 | else if (type == GL_COLOR && !ctx->Visual.rgbMode) { |
||
| 803 | copy_ci_pixels( ctx, srcx, srcy, width, height, destx, desty ); |
||
| 804 | } |
||
| 805 | else if (type == GL_DEPTH) { |
||
| 806 | copy_depth_pixels( ctx, srcx, srcy, width, height, destx, desty ); |
||
| 807 | } |
||
| 808 | else if (type == GL_STENCIL) { |
||
| 809 | copy_stencil_pixels( ctx, srcx, srcy, width, height, destx, desty ); |
||
| 810 | } |
||
| 811 | else { |
||
| 812 | _mesa_error( ctx, GL_INVALID_ENUM, "glCopyPixels" ); |
||
| 813 | } |
||
| 814 | |||
| 815 | RENDER_FINISH(swrast,ctx); |
||
| 816 | } |