| 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 "packer.h"
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| 8 | #include "cr_error.h"
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| 9 |
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| 10 | static GLboolean __handleLightData( GLenum light, GLenum pname, const GLfloat *params )
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| 11 | {
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| 12 | CR_GET_PACKER_CONTEXT(pc);
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| 13 | unsigned int packet_length = sizeof( int ) + sizeof( light ) + sizeof( pname );
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| 14 | unsigned int params_length = 0;
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| 15 | unsigned char *data_ptr;
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| 16 | switch( pname )
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| 17 | {
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| 18 | case GL_AMBIENT:
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| 19 | case GL_DIFFUSE:
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| 20 | case GL_SPECULAR:
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| 21 | case GL_POSITION:
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| 22 | params_length = 4*sizeof( *params );
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| 23 | break;
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| 24 | case GL_SPOT_DIRECTION:
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| 25 | params_length = 3*sizeof( *params );
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| 26 | break;
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| 27 | case GL_SPOT_EXPONENT:
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| 28 | case GL_SPOT_CUTOFF:
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| 29 | case GL_CONSTANT_ATTENUATION:
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| 30 | case GL_LINEAR_ATTENUATION:
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| 31 | case GL_QUADRATIC_ATTENUATION:
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| 32 | params_length = sizeof( *params );
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| 33 | break;
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| 34 | default:
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| 35 | __PackError( __LINE__, __FILE__, GL_INVALID_ENUM,
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| 36 | "crPackLight(bad pname)" );
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| 37 | return GL_FALSE;
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| 38 | }
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| 39 | packet_length += params_length;
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| 40 | CR_GET_BUFFERED_POINTER(pc, packet_length );
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| 41 | WRITE_DATA( 0, int, packet_length );
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| 42 | WRITE_DATA( sizeof( int ) + 0, GLenum, light );
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| 43 | WRITE_DATA( sizeof( int ) + 4, GLenum, pname );
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| 44 | WRITE_DATA( sizeof( int ) + 8, GLfloat, params[0] );
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| 45 | if (params_length > sizeof( *params ))
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| 46 | {
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| 47 | WRITE_DATA( sizeof( int ) + 12, GLfloat, params[1] );
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| 48 | WRITE_DATA( sizeof( int ) + 16, GLfloat, params[2] );
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| 49 | }
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| 50 | if (params_length > 3*sizeof( *params ))
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| 51 | {
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| 52 | WRITE_DATA( sizeof( int ) + 20, GLfloat, params[3] );
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| 53 | }
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| 54 | return GL_TRUE;
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| 55 | }
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| 56 |
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| 57 | void PACK_APIENTRY crPackLightfv (GLenum light, GLenum pname, const GLfloat *params)
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| 58 | {
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| 59 | CR_GET_PACKER_CONTEXT(pc);
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| 60 | if (__handleLightData( light, pname, params ))
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| 61 | WRITE_OPCODE( pc, CR_LIGHTFV_OPCODE );
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| 62 | CR_UNLOCK_PACKER_CONTEXT(pc);
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| 63 | }
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| 64 |
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| 65 | void PACK_APIENTRY crPackLightiv (GLenum light, GLenum pname, const GLint *params)
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| 66 | {
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| 67 | /* floats and ints are the same size, so the packing should be the same */
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| 68 | CR_GET_PACKER_CONTEXT(pc);
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| 69 | if (__handleLightData( light, pname, (const GLfloat *) params ))
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| 70 | WRITE_OPCODE( pc, CR_LIGHTIV_OPCODE );
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| 71 | CR_UNLOCK_PACKER_CONTEXT(pc);
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| 72 | }
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| 73 |
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| 74 | static GLboolean __handleLightModelData( GLenum pname, const GLfloat *params )
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| 75 | {
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| 76 | CR_GET_PACKER_CONTEXT(pc);
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| 77 | unsigned int packet_length = sizeof( int ) + sizeof( pname );
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| 78 | unsigned int params_length = 0;
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| 79 | unsigned char *data_ptr;
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| 80 | switch( pname )
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| 81 | {
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| 82 | case GL_LIGHT_MODEL_AMBIENT:
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| 83 | params_length = 4*sizeof( *params );
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| 84 | break;
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| 85 | case GL_LIGHT_MODEL_TWO_SIDE:
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| 86 | case GL_LIGHT_MODEL_LOCAL_VIEWER:
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| 87 | params_length = sizeof( *params );
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| 88 | break;
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| 89 | default:
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| 90 | __PackError( __LINE__, __FILE__, GL_INVALID_ENUM,
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| 91 | "crPackLightModel(bad pname)" );
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| 92 | return GL_FALSE;
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| 93 | }
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| 94 | packet_length += params_length;
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| 95 | CR_GET_BUFFERED_POINTER(pc, packet_length );
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| 96 | WRITE_DATA( 0, int, packet_length );
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| 97 | WRITE_DATA( sizeof( int ) + 0, GLenum, pname );
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| 98 | WRITE_DATA( sizeof( int ) + 4, GLfloat, params[0] );
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| 99 | if (params_length > sizeof( *params ))
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| 100 | {
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| 101 | WRITE_DATA( sizeof( int ) + 8, GLfloat, params[1] );
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| 102 | WRITE_DATA( sizeof( int ) + 12, GLfloat, params[2] );
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| 103 | WRITE_DATA( sizeof( int ) + 16, GLfloat, params[3] );
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| 104 | }
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| 105 | return GL_TRUE;
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| 106 | }
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| 107 |
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| 108 | void PACK_APIENTRY crPackLightModelfv (GLenum pname, const GLfloat *params)
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| 109 | {
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| 110 | CR_GET_PACKER_CONTEXT(pc);
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| 111 | if (__handleLightModelData( pname, params ))
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| 112 | WRITE_OPCODE( pc, CR_LIGHTMODELFV_OPCODE );
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| 113 | CR_UNLOCK_PACKER_CONTEXT(pc);
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| 114 | }
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| 115 |
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| 116 | void PACK_APIENTRY crPackLightModeliv (GLenum pname, const GLint *params)
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| 117 | {
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| 118 | /* floats and ints are the same size, so the packing should be the same */
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| 119 | CR_GET_PACKER_CONTEXT(pc);
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| 120 | if (__handleLightModelData( pname, (const GLfloat *) params ))
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| 121 | WRITE_OPCODE( pc, CR_LIGHTMODELIV_OPCODE );
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| 122 | CR_UNLOCK_PACKER_CONTEXT(pc);
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| 123 | }
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