| 1 | /* Copyright (c) 2001, Stanford University
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| 2 | * All rights reserved
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| 3 | *
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| 4 | * See the file LICENSE.txt for information on redistributing this software.
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| 5 | */
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| 6 |
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| 7 | #include "cr_spu.h"
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| 8 | #include "chromium.h"
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| 9 | #include "cr_error.h"
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| 10 | #include "cr_mem.h"
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| 11 | #include "cr_net.h"
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| 12 | #include "cr_pixeldata.h"
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| 13 | #include "cr_unpack.h"
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| 14 | #include "server_dispatch.h"
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| 15 | #include "server.h"
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| 16 |
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| 17 |
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| 18 | void SERVER_DISPATCH_APIENTRY
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| 19 | crServerDispatchReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
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| 20 | GLenum format, GLenum type, GLvoid *pixels)
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| 21 | {
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| 22 | const GLint stride = READ_DATA( 24, GLint );
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| 23 | const GLint alignment = READ_DATA( 28, GLint );
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| 24 | const GLint skipRows = READ_DATA( 32, GLint );
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| 25 | const GLint skipPixels = READ_DATA( 36, GLint );
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| 26 | const GLint bytes_per_row = READ_DATA( 40, GLint );
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| 27 | const GLint rowLength = READ_DATA( 44, GLint );
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| 28 |
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| 29 | CRASSERT(bytes_per_row > 0);
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| 30 |
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| 31 | #ifdef CR_ARB_pixel_buffer_object
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| 32 | if (crStateIsBufferBound(GL_PIXEL_PACK_BUFFER_ARB))
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| 33 | {
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| 34 | GLvoid *pbo_offset;
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| 35 |
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| 36 | /*pixels are actually a pointer to location of 8byte network pointer in hgcm buffer
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| 37 | regardless of guest/host bitness we're using only 4lower bytes as there're no
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| 38 | pbo>4gb (yet?)
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| 39 | */
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| 40 | pbo_offset = (GLvoid*) ((uintptr_t) *((GLint*)pixels));
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| 41 |
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| 42 | cr_server.head_spu->dispatch_table.ReadPixels(x, y, width, height,
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| 43 | format, type, pbo_offset);
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| 44 | }
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| 45 | else
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| 46 | #endif
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| 47 | {
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| 48 | CRMessageReadPixels *rp;
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| 49 | uint32_t msg_len;
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| 50 |
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| 51 | if (bytes_per_row < 0 || bytes_per_row > UINT32_MAX / 8 || height > UINT32_MAX / 8)
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| 52 | {
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| 53 | crError("crServerDispatchReadPixels: parameters out of range");
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| 54 | return;
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| 55 | }
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| 56 |
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| 57 | msg_len = sizeof(*rp) + (uint32_t)bytes_per_row * height;
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| 58 |
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| 59 | rp = (CRMessageReadPixels *) crAlloc( msg_len );
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| 60 | if (!rp)
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| 61 | {
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| 62 | crError("crServerDispatchReadPixels: out of memory");
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| 63 | return;
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| 64 | }
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| 65 |
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| 66 | /* Note: the ReadPixels data gets densely packed into the buffer
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| 67 | * (no skip pixels, skip rows, etc. It's up to the receiver (pack spu,
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| 68 | * tilesort spu, etc) to apply the real PixelStore packing parameters.
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| 69 | */
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| 70 | cr_server.head_spu->dispatch_table.ReadPixels(x, y, width, height,
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| 71 | format, type, rp + 1);
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| 72 |
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| 73 | rp->header.type = CR_MESSAGE_READ_PIXELS;
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| 74 | rp->width = width;
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| 75 | rp->height = height;
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| 76 | rp->bytes_per_row = bytes_per_row;
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| 77 | rp->stride = stride;
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| 78 | rp->format = format;
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| 79 | rp->type = type;
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| 80 | rp->alignment = alignment;
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| 81 | rp->skipRows = skipRows;
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| 82 | rp->skipPixels = skipPixels;
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| 83 | rp->rowLength = rowLength;
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| 84 |
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| 85 | /* <pixels> points to the 8-byte network pointer */
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| 86 | crMemcpy( &rp->pixels, pixels, sizeof(rp->pixels) );
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| 87 |
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| 88 | crNetSend( cr_server.curClient->conn, NULL, rp, msg_len );
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| 89 | crFree( rp );
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| 90 | }
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| 91 | }
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