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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 57 | pj | 1 | /* $Id: s_readpix.c,v 1.1 2003-02-28 11:49:42 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 | |||
| 28 | #include "glheader.h" |
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| 29 | #include "colormac.h" |
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| 30 | #include "convolve.h" |
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| 31 | #include "context.h" |
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| 32 | #include "feedback.h" |
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| 33 | #include "image.h" |
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| 34 | #include "macros.h" |
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| 35 | #include "imports.h" |
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| 36 | #include "pixel.h" |
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| 37 | |||
| 38 | #include "s_alphabuf.h" |
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| 39 | #include "s_context.h" |
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| 40 | #include "s_depth.h" |
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| 41 | #include "s_span.h" |
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| 42 | #include "s_stencil.h" |
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| 43 | |||
| 44 | |||
| 45 | |||
| 46 | /* |
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| 47 | * Read a block of color index pixels. |
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| 48 | */ |
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| 49 | static void |
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| 50 | read_index_pixels( GLcontext *ctx, |
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| 51 | GLint x, GLint y, |
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| 52 | GLsizei width, GLsizei height, |
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| 53 | GLenum type, GLvoid *pixels, |
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| 54 | const struct gl_pixelstore_attrib *packing ) |
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| 55 | { |
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| 56 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
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| 57 | GLint i, readWidth; |
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| 58 | |||
| 59 | /* error checking */ |
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| 60 | if (ctx->Visual.rgbMode) { |
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| 61 | _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" ); |
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| 62 | return; |
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| 63 | } |
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| 64 | |||
| 65 | _swrast_use_read_buffer(ctx); |
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| 66 | |||
| 67 | readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; |
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| 68 | |||
| 69 | /* process image row by row */ |
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| 70 | for (i = 0; i < height; i++) { |
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| 71 | GLuint index[MAX_WIDTH]; |
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| 72 | GLvoid *dest; |
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| 73 | |||
| 74 | (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y + i, index); |
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| 75 | |||
| 76 | dest = _mesa_image_address(packing, pixels, width, height, |
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| 77 | GL_COLOR_INDEX, type, 0, i, 0); |
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| 78 | |||
| 79 | _mesa_pack_index_span(ctx, readWidth, type, dest, index, |
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| 80 | &ctx->Pack, ctx->_ImageTransferState); |
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| 81 | } |
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| 82 | |||
| 83 | _swrast_use_draw_buffer(ctx); |
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| 84 | } |
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| 85 | |||
| 86 | |||
| 87 | |||
| 88 | static void |
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| 89 | read_depth_pixels( GLcontext *ctx, |
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| 90 | GLint x, GLint y, |
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| 91 | GLsizei width, GLsizei height, |
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| 92 | GLenum type, GLvoid *pixels, |
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| 93 | const struct gl_pixelstore_attrib *packing ) |
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| 94 | { |
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| 95 | GLint readWidth; |
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| 96 | GLboolean bias_or_scale; |
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| 97 | |||
| 98 | /* Error checking */ |
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| 99 | if (ctx->Visual.depthBits <= 0) { |
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| 100 | /* No depth buffer */ |
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| 101 | _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" ); |
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| 102 | return; |
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| 103 | } |
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| 104 | |||
| 105 | readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; |
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| 106 | |||
| 107 | if (type != GL_BYTE && |
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| 108 | type != GL_UNSIGNED_BYTE && |
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| 109 | type != GL_SHORT && |
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| 110 | type != GL_UNSIGNED_SHORT && |
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| 111 | type != GL_INT && |
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| 112 | type != GL_UNSIGNED_INT && |
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| 113 | type != GL_FLOAT) { |
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| 114 | _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels(depth type)"); |
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| 115 | return; |
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| 116 | } |
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| 117 | |||
| 118 | bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0; |
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| 119 | |||
| 120 | if (type==GL_UNSIGNED_SHORT && ctx->Visual.depthBits == 16 |
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| 121 | && !bias_or_scale && !packing->SwapBytes) { |
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| 122 | /* Special case: directly read 16-bit unsigned depth values. */ |
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| 123 | GLint j; |
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| 124 | for (j=0;j<height;j++,y++) { |
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| 125 | GLdepth depth[MAX_WIDTH]; |
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| 126 | GLushort *dst = (GLushort*) _mesa_image_address( packing, pixels, |
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| 127 | width, height, GL_DEPTH_COMPONENT, type, 0, j, 0 ); |
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| 128 | GLint i; |
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| 129 | _mesa_read_depth_span(ctx, width, x, y, depth); |
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| 130 | for (i = 0; i < width; i++) |
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| 131 | dst[i] = depth[i]; |
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| 132 | } |
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| 133 | } |
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| 134 | else if (type==GL_UNSIGNED_INT && ctx->Visual.depthBits == 32 |
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| 135 | && !bias_or_scale && !packing->SwapBytes) { |
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| 136 | /* Special case: directly read 32-bit unsigned depth values. */ |
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| 137 | GLint j; |
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| 138 | for (j=0;j<height;j++,y++) { |
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| 139 | GLdepth *dst = (GLdepth *) _mesa_image_address( packing, pixels, |
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| 140 | width, height, GL_DEPTH_COMPONENT, type, 0, j, 0 ); |
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| 141 | _mesa_read_depth_span(ctx, width, x, y, dst); |
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| 142 | } |
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| 143 | } |
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| 144 | else { |
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| 145 | /* General case (slower) */ |
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| 146 | GLint j; |
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| 147 | for (j=0;j<height;j++,y++) { |
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| 148 | GLfloat depth[MAX_WIDTH]; |
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| 149 | GLvoid *dest; |
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| 150 | |||
| 151 | _mesa_read_depth_span_float(ctx, readWidth, x, y, depth); |
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| 152 | |||
| 153 | dest = _mesa_image_address(packing, pixels, width, height, |
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| 154 | GL_DEPTH_COMPONENT, type, 0, j, 0); |
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| 155 | |||
| 156 | _mesa_pack_depth_span(ctx, readWidth, (GLdepth *) dest, type, |
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| 157 | depth, &ctx->Pack); |
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| 158 | } |
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| 159 | } |
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| 160 | } |
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| 161 | |||
| 162 | |||
| 163 | |||
| 164 | static void |
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| 165 | read_stencil_pixels( GLcontext *ctx, |
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| 166 | GLint x, GLint y, |
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| 167 | GLsizei width, GLsizei height, |
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| 168 | GLenum type, GLvoid *pixels, |
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| 169 | const struct gl_pixelstore_attrib *packing ) |
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| 170 | { |
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| 171 | GLint j, readWidth; |
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| 172 | |||
| 173 | if (type != GL_BYTE && |
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| 174 | type != GL_UNSIGNED_BYTE && |
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| 175 | type != GL_SHORT && |
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| 176 | type != GL_UNSIGNED_SHORT && |
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| 177 | type != GL_INT && |
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| 178 | type != GL_UNSIGNED_INT && |
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| 179 | type != GL_FLOAT && |
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| 180 | type != GL_BITMAP) { |
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| 181 | _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels(stencil type)"); |
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| 182 | return; |
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| 183 | } |
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| 184 | |||
| 185 | readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; |
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| 186 | |||
| 187 | if (ctx->Visual.stencilBits <= 0) { |
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| 188 | /* No stencil buffer */ |
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| 189 | _mesa_error( ctx, GL_INVALID_OPERATION, "glReadPixels" ); |
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| 190 | return; |
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| 191 | } |
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| 192 | |||
| 193 | /* process image row by row */ |
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| 194 | for (j=0;j<height;j++,y++) { |
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| 195 | GLvoid *dest; |
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| 196 | GLstencil stencil[MAX_WIDTH]; |
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| 197 | |||
| 198 | _mesa_read_stencil_span(ctx, readWidth, x, y, stencil); |
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| 199 | |||
| 200 | dest = _mesa_image_address(packing, pixels, width, height, |
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| 201 | GL_STENCIL_INDEX, type, 0, j, 0); |
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| 202 | |||
| 203 | _mesa_pack_stencil_span(ctx, readWidth, type, dest, stencil, &ctx->Pack); |
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| 204 | } |
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| 205 | } |
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| 206 | |||
| 207 | |||
| 208 | |||
| 209 | /* |
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| 210 | * Optimized glReadPixels for particular pixel formats: |
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| 211 | * GL_UNSIGNED_BYTE, GL_RGBA |
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| 212 | * when pixel scaling, biasing and mapping are disabled. |
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| 213 | */ |
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| 214 | static GLboolean |
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| 215 | read_fast_rgba_pixels( GLcontext *ctx, |
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| 216 | GLint x, GLint y, |
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| 217 | GLsizei width, GLsizei height, |
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| 218 | GLenum format, GLenum type, |
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| 219 | GLvoid *pixels, |
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| 220 | const struct gl_pixelstore_attrib *packing ) |
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| 221 | { |
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| 222 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
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| 223 | /* can't do scale, bias, mapping, etc */ |
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| 224 | if (ctx->_ImageTransferState) |
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| 225 | return GL_FALSE; |
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| 226 | |||
| 227 | /* can't do fancy pixel packing */ |
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| 228 | if (packing->Alignment != 1 || packing->SwapBytes || packing->LsbFirst) |
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| 229 | return GL_FALSE; |
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| 230 | |||
| 231 | { |
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| 232 | GLint srcX = x; |
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| 233 | GLint srcY = y; |
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| 234 | GLint readWidth = width; /* actual width read */ |
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| 235 | GLint readHeight = height; /* actual height read */ |
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| 236 | GLint skipPixels = packing->SkipPixels; |
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| 237 | GLint skipRows = packing->SkipRows; |
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| 238 | GLint rowLength; |
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| 239 | |||
| 240 | if (packing->RowLength > 0) |
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| 241 | rowLength = packing->RowLength; |
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| 242 | else |
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| 243 | rowLength = width; |
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| 244 | |||
| 245 | /* horizontal clipping */ |
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| 246 | if (srcX < 0) { |
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| 247 | skipPixels -= srcX; |
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| 248 | readWidth += srcX; |
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| 249 | srcX = 0; |
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| 250 | } |
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| 251 | if (srcX + readWidth > (GLint) ctx->ReadBuffer->Width) |
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| 252 | readWidth -= (srcX + readWidth - (GLint) ctx->ReadBuffer->Width); |
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| 253 | if (readWidth <= 0) |
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| 254 | return GL_TRUE; |
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| 255 | |||
| 256 | /* vertical clipping */ |
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| 257 | if (srcY < 0) { |
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| 258 | skipRows -= srcY; |
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| 259 | readHeight += srcY; |
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| 260 | srcY = 0; |
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| 261 | } |
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| 262 | if (srcY + readHeight > (GLint) ctx->ReadBuffer->Height) |
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| 263 | readHeight -= (srcY + readHeight - (GLint) ctx->ReadBuffer->Height); |
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| 264 | if (readHeight <= 0) |
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| 265 | return GL_TRUE; |
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| 266 | |||
| 267 | /* |
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| 268 | * Ready to read! |
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| 269 | * The window region at (destX, destY) of size (readWidth, readHeight) |
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| 270 | * will be read back. |
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| 271 | * We'll write pixel data to buffer pointed to by "pixels" but we'll |
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| 272 | * skip "skipRows" rows and skip "skipPixels" pixels/row. |
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| 273 | */ |
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| 274 | #if CHAN_BITS == 8 |
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| 275 | if (format == GL_RGBA && type == GL_UNSIGNED_BYTE) { |
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| 276 | #elif CHAN_BITS == 16 |
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| 277 | if (format == GL_RGBA && type == GL_UNSIGNED_SHORT) { |
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| 278 | #else |
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| 279 | if (0) { |
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| 280 | #endif |
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| 281 | GLchan *dest = (GLchan *) pixels |
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| 282 | + (skipRows * rowLength + skipPixels) * 4; |
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| 283 | GLint row; |
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| 284 | |||
| 285 | if (packing->Invert) { |
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| 286 | /* start at top and go down */ |
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| 287 | dest += (readHeight - 1) * rowLength * 4; |
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| 288 | rowLength = -rowLength; |
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| 289 | } |
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| 290 | |||
| 291 | for (row=0; row<readHeight; row++) { |
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| 292 | (*swrast->Driver.ReadRGBASpan)(ctx, readWidth, srcX, srcY, |
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| 293 | (GLchan (*)[4]) dest); |
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| 294 | if (ctx->DrawBuffer->UseSoftwareAlphaBuffers) { |
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| 295 | _mesa_read_alpha_span(ctx, readWidth, srcX, srcY, |
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| 296 | (GLchan (*)[4]) dest); |
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| 297 | } |
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| 298 | dest += rowLength * 4; |
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| 299 | srcY++; |
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| 300 | } |
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| 301 | return GL_TRUE; |
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| 302 | } |
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| 303 | else { |
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| 304 | /* can't do this format/type combination */ |
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| 305 | return GL_FALSE; |
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| 306 | } |
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| 307 | } |
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| 308 | } |
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| 309 | |||
| 310 | |||
| 311 | |||
| 312 | /* |
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| 313 | * Read R, G, B, A, RGB, L, or LA pixels. |
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| 314 | */ |
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| 315 | static void |
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| 316 | read_rgba_pixels( GLcontext *ctx, |
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| 317 | GLint x, GLint y, |
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| 318 | GLsizei width, GLsizei height, |
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| 319 | GLenum format, GLenum type, GLvoid *pixels, |
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| 320 | const struct gl_pixelstore_attrib *packing ) |
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| 321 | { |
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| 322 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
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| 323 | GLint readWidth; |
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| 324 | |||
| 325 | _swrast_use_read_buffer(ctx); |
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| 326 | |||
| 327 | /* Try optimized path first */ |
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| 328 | if (read_fast_rgba_pixels( ctx, x, y, width, height, |
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| 329 | format, type, pixels, packing )) { |
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| 330 | |||
| 331 | _swrast_use_draw_buffer(ctx); |
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| 332 | return; /* done! */ |
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| 333 | } |
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| 334 | |||
| 335 | readWidth = (width > MAX_WIDTH) ? MAX_WIDTH : width; |
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| 336 | |||
| 337 | /* do error checking on pixel type, format was already checked by caller */ |
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| 338 | switch (type) { |
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| 339 | case GL_UNSIGNED_BYTE: |
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| 340 | case GL_BYTE: |
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| 341 | case GL_UNSIGNED_SHORT: |
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| 342 | case GL_SHORT: |
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| 343 | case GL_UNSIGNED_INT: |
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| 344 | case GL_INT: |
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| 345 | case GL_FLOAT: |
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| 346 | case GL_UNSIGNED_BYTE_3_3_2: |
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| 347 | case GL_UNSIGNED_BYTE_2_3_3_REV: |
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| 348 | case GL_UNSIGNED_SHORT_5_6_5: |
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| 349 | case GL_UNSIGNED_SHORT_5_6_5_REV: |
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| 350 | case GL_UNSIGNED_SHORT_4_4_4_4: |
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| 351 | case GL_UNSIGNED_SHORT_4_4_4_4_REV: |
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| 352 | case GL_UNSIGNED_SHORT_5_5_5_1: |
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| 353 | case GL_UNSIGNED_SHORT_1_5_5_5_REV: |
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| 354 | case GL_UNSIGNED_INT_8_8_8_8: |
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| 355 | case GL_UNSIGNED_INT_8_8_8_8_REV: |
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| 356 | case GL_UNSIGNED_INT_10_10_10_2: |
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| 357 | case GL_UNSIGNED_INT_2_10_10_10_REV: |
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| 358 | /* valid pixel type */ |
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| 359 | break; |
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| 360 | default: |
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| 361 | _mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(type)" ); |
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| 362 | return; |
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| 363 | } |
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| 364 | |||
| 365 | if (!_mesa_is_legal_format_and_type(format, type) || |
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| 366 | format == GL_INTENSITY) { |
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| 367 | _mesa_error(ctx, GL_INVALID_OPERATION, "glReadPixels(format or type)"); |
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| 368 | return; |
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| 369 | } |
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| 370 | |||
| 371 | if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) { |
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| 372 | const GLuint transferOps = ctx->_ImageTransferState; |
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| 373 | GLfloat *dest, *src, *tmpImage, *convImage; |
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| 374 | GLint row; |
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| 375 | |||
| 376 | tmpImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat)); |
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| 377 | if (!tmpImage) { |
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| 378 | _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels"); |
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| 379 | return; |
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| 380 | } |
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| 381 | convImage = (GLfloat *) MALLOC(width * height * 4 * sizeof(GLfloat)); |
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| 382 | if (!convImage) { |
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| 383 | FREE(tmpImage); |
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| 384 | _mesa_error(ctx, GL_OUT_OF_MEMORY, "glReadPixels"); |
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| 385 | return; |
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| 386 | } |
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| 387 | |||
| 388 | /* read full RGBA, FLOAT image */ |
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| 389 | dest = tmpImage; |
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| 390 | for (row = 0; row < height; row++, y++) { |
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| 391 | GLchan rgba[MAX_WIDTH][4]; |
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| 392 | if (ctx->Visual.rgbMode) { |
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| 393 | _mesa_read_rgba_span(ctx, ctx->ReadBuffer, readWidth, x, y, rgba); |
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| 394 | } |
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| 395 | else { |
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| 396 | GLuint index[MAX_WIDTH]; |
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| 397 | (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y, index); |
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| 398 | if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset !=0 ) { |
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| 399 | _mesa_map_ci(ctx, readWidth, index); |
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| 400 | } |
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| 401 | _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba); |
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| 402 | } |
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| 403 | _mesa_pack_rgba_span(ctx, readWidth, (const GLchan (*)[4]) rgba, |
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| 404 | GL_RGBA, GL_FLOAT, dest, &_mesa_native_packing, |
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| 405 | transferOps & IMAGE_PRE_CONVOLUTION_BITS); |
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| 406 | dest += width * 4; |
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| 407 | } |
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| 408 | |||
| 409 | /* do convolution */ |
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| 410 | if (ctx->Pixel.Convolution2DEnabled) { |
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| 411 | _mesa_convolve_2d_image(ctx, &readWidth, &height, tmpImage, convImage); |
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| 412 | } |
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| 413 | else { |
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| 414 | ASSERT(ctx->Pixel.Separable2DEnabled); |
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| 415 | _mesa_convolve_sep_image(ctx, &readWidth, &height, tmpImage, convImage); |
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| 416 | } |
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| 417 | FREE(tmpImage); |
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| 418 | |||
| 419 | /* finish transfer ops and pack the resulting image */ |
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| 420 | src = convImage; |
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| 421 | for (row = 0; row < height; row++) { |
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| 422 | GLvoid *dest; |
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| 423 | dest = _mesa_image_address(packing, pixels, readWidth, height, |
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| 424 | format, type, 0, row, 0); |
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| 425 | _mesa_pack_float_rgba_span(ctx, readWidth, |
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| 426 | (const GLfloat (*)[4]) src, |
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| 427 | format, type, dest, packing, |
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| 428 | transferOps & IMAGE_POST_CONVOLUTION_BITS); |
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| 429 | src += readWidth * 4; |
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| 430 | } |
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| 431 | } |
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| 432 | else { |
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| 433 | /* no convolution */ |
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| 434 | GLint row; |
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| 435 | for (row = 0; row < height; row++, y++) { |
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| 436 | GLchan rgba[MAX_WIDTH][4]; |
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| 437 | GLvoid *dst; |
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| 438 | if (ctx->Visual.rgbMode) { |
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| 439 | _mesa_read_rgba_span(ctx, ctx->ReadBuffer, readWidth, x, y, rgba); |
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| 440 | } |
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| 441 | else { |
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| 442 | GLuint index[MAX_WIDTH]; |
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| 443 | (*swrast->Driver.ReadCI32Span)(ctx, readWidth, x, y, index); |
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| 444 | if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) { |
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| 445 | _mesa_map_ci(ctx, readWidth, index); |
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| 446 | } |
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| 447 | _mesa_map_ci_to_rgba_chan(ctx, readWidth, index, rgba); |
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| 448 | } |
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| 449 | dst = _mesa_image_address(packing, pixels, width, height, |
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| 450 | format, type, 0, row, 0); |
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| 451 | if (ctx->Visual.redBits < CHAN_BITS || |
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| 452 | ctx->Visual.greenBits < CHAN_BITS || |
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| 453 | ctx->Visual.blueBits < CHAN_BITS) { |
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| 454 | /* Requantize the color values into floating point and go from |
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| 455 | * there. This fixes conformance failures with 16-bit color |
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| 456 | * buffers, for example. |
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| 457 | */ |
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| 458 | DEFMARRAY(GLfloat, rgbaf, MAX_WIDTH, 4); /* mac 32k limitation */ |
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| 459 | CHECKARRAY(rgbaf, return); /* mac 32k limitation */ |
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| 460 | _mesa_chan_to_float_span(ctx, readWidth, |
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| 461 | (CONST GLchan (*)[4]) rgba, rgbaf); |
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| 462 | _mesa_pack_float_rgba_span(ctx, readWidth, |
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| 463 | (CONST GLfloat (*)[4]) rgbaf, |
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| 464 | format, type, dst, packing, |
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| 465 | ctx->_ImageTransferState); |
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| 466 | UNDEFARRAY(rgbaf); /* mac 32k limitation */ |
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| 467 | } |
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| 468 | else { |
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| 469 | /* GLubytes are fine */ |
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| 470 | _mesa_pack_rgba_span(ctx, readWidth, (CONST GLchan (*)[4]) rgba, |
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| 471 | format, type, dst, packing, |
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| 472 | ctx->_ImageTransferState); |
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| 473 | } |
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| 474 | } |
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| 475 | } |
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| 476 | |||
| 477 | _swrast_use_draw_buffer(ctx); |
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| 478 | } |
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| 479 | |||
| 480 | |||
| 481 | |||
| 482 | void |
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| 483 | _swrast_ReadPixels( GLcontext *ctx, |
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| 484 | GLint x, GLint y, GLsizei width, GLsizei height, |
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| 485 | GLenum format, GLenum type, |
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| 486 | const struct gl_pixelstore_attrib *pack, |
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| 487 | GLvoid *pixels ) |
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| 488 | { |
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| 489 | SWcontext *swrast = SWRAST_CONTEXT(ctx); |
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| 490 | (void) pack; |
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| 491 | |||
| 492 | if (swrast->NewState) |
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| 493 | _swrast_validate_derived( ctx ); |
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| 494 | |||
| 495 | RENDER_START(swrast,ctx); |
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| 496 | |||
| 497 | switch (format) { |
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| 498 | case GL_COLOR_INDEX: |
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| 499 | read_index_pixels(ctx, x, y, width, height, type, pixels, &ctx->Pack); |
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| 500 | break; |
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| 501 | case GL_STENCIL_INDEX: |
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| 502 | read_stencil_pixels(ctx, x,y, width,height, type, pixels, &ctx->Pack); |
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| 503 | break; |
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| 504 | case GL_DEPTH_COMPONENT: |
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| 505 | read_depth_pixels(ctx, x, y, width, height, type, pixels, &ctx->Pack); |
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| 506 | break; |
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| 507 | case GL_RED: |
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| 508 | case GL_GREEN: |
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| 509 | case GL_BLUE: |
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| 510 | case GL_ALPHA: |
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| 511 | case GL_RGB: |
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| 512 | case GL_LUMINANCE: |
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| 513 | case GL_LUMINANCE_ALPHA: |
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| 514 | case GL_RGBA: |
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| 515 | case GL_BGR: |
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| 516 | case GL_BGRA: |
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| 517 | case GL_ABGR_EXT: |
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| 518 | read_rgba_pixels(ctx, x, y, width, height, |
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| 519 | format, type, pixels, &ctx->Pack); |
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| 520 | break; |
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| 521 | default: |
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| 522 | _mesa_error( ctx, GL_INVALID_ENUM, "glReadPixels(format)" ); |
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| 523 | } |
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| 524 | |||
| 525 | RENDER_FINISH(swrast,ctx); |
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| 526 | } |