indirect_vertex_array.c

来自「Mesa is an open-source implementation of」· C语言 代码 · 共 1,877 行 · 第 1/4 页

    case GL_SHORT:		opcode = 4127; break;
    case GL_UNSIGNED_SHORT:	opcode = 4132; break;
    case GL_INT:		opcode = 4128; break;
    case GL_UNSIGNED_INT:	opcode = 4133; break;
    case GL_FLOAT:		opcode = 4129; break;
    case GL_DOUBLE:		opcode = 4130; break;
    default:
        __glXSetError(gc, GL_INVALID_ENUM);
        return;
    }

    a = get_array_entry( arrays, GL_SECONDARY_COLOR_ARRAY, 0 );
    if ( a == NULL ) {
        __glXSetError(gc, GL_INVALID_OPERATION);
        return;
    }

    COMMON_ARRAY_DATA_INIT( a, pointer, type, stride, size, GL_TRUE, 4,
			    opcode );

    if ( a->enabled ) {
	arrays->array_info_cache_valid = GL_FALSE;
    }
}


void __indirect_glFogCoordPointerEXT( GLenum type, GLsizei stride,
				const GLvoid * pointer )
{
    uint16_t opcode;
    __GLXcontext *gc = __glXGetCurrentContext();
    __GLXattribute * state = (__GLXattribute *)(gc->client_state_private);
    struct array_state_vector * arrays = state->array_state;
    struct array_state * a;


    if (stride < 0) {
        __glXSetError(gc, GL_INVALID_VALUE);
        return;
    }

    switch ( type ) {
    case GL_FLOAT:		opcode = 4124; break;
    case GL_DOUBLE:		opcode = 4125; break;
    default:
        __glXSetError(gc, GL_INVALID_ENUM);
        return;
    }

    a = get_array_entry( arrays, GL_FOG_COORD_ARRAY, 0 );
    if ( a == NULL ) {
        __glXSetError(gc, GL_INVALID_OPERATION);
        return;
    }

    COMMON_ARRAY_DATA_INIT( a, pointer, type, stride, 1, GL_FALSE, 4,
			    opcode );

    if ( a->enabled ) {
	arrays->array_info_cache_valid = GL_FALSE;
    }
}


void __indirect_glVertexAttribPointerARB(GLuint index, GLint size,
					 GLenum type, GLboolean normalized,
					 GLsizei stride,
					 const GLvoid * pointer)
{
    static const uint16_t short_ops[5]  = { 0, 4189, 4190, 4191, 4192 };
    static const uint16_t float_ops[5]  = { 0, 4193, 4194, 4195, 4196 };
    static const uint16_t double_ops[5] = { 0, 4197, 4198, 4199, 4200 };

    uint16_t opcode;
    __GLXcontext *gc = __glXGetCurrentContext();
    __GLXattribute * state = (__GLXattribute *)(gc->client_state_private);
    struct array_state_vector * arrays = state->array_state;
    struct array_state * a;
    unsigned true_immediate_count;
    unsigned true_immediate_size;


    if ( (size < 1) || (size > 4) || (stride < 0) 
	 || (index > arrays->num_vertex_program_attribs) ){
        __glXSetError(gc, GL_INVALID_VALUE);
        return;
    }

    if ( normalized && (type != GL_FLOAT) && (type != GL_DOUBLE)) {
	switch( type ) {
	case GL_BYTE:           opcode = X_GLrop_VertexAttrib4NbvARB;  break;
	case GL_UNSIGNED_BYTE:  opcode = X_GLrop_VertexAttrib4NubvARB; break;
	case GL_SHORT:          opcode = X_GLrop_VertexAttrib4NsvARB;  break;
	case GL_UNSIGNED_SHORT: opcode = X_GLrop_VertexAttrib4NusvARB; break;
	case GL_INT:            opcode = X_GLrop_VertexAttrib4NivARB;  break;
	case GL_UNSIGNED_INT:   opcode = X_GLrop_VertexAttrib4NuivARB; break;
	default:
	    __glXSetError(gc, GL_INVALID_ENUM);
	    return;
	}
	
	true_immediate_count = 4;
    }
    else {
	true_immediate_count = size;

	switch( type ) {
	case GL_BYTE:
	    opcode = X_GLrop_VertexAttrib4bvARB;
	    true_immediate_count = 4;
	    break;
	case GL_UNSIGNED_BYTE:
	    opcode = X_GLrop_VertexAttrib4ubvARB;
	    true_immediate_count = 4;
	    break;
	case GL_SHORT:
	    opcode = short_ops[size];
	    break;
	case GL_UNSIGNED_SHORT:
	    opcode = X_GLrop_VertexAttrib4usvARB;
	    true_immediate_count = 4;
	    break;
	case GL_INT:
            opcode = X_GLrop_VertexAttrib4ivARB;
	    true_immediate_count = 4;
	    break;
	case GL_UNSIGNED_INT:
	    opcode = X_GLrop_VertexAttrib4uivARB;
	    true_immediate_count = 4;
	    break;
	case GL_FLOAT:
	    opcode = float_ops[size];
	    break;
	case GL_DOUBLE:
	    opcode = double_ops[size];
	    break;
	default:
	    __glXSetError(gc, GL_INVALID_ENUM);
	    return;
	}
    }

    a = get_array_entry( arrays, GL_VERTEX_ATTRIB_ARRAY_POINTER, index );
    if ( a == NULL ) {
        __glXSetError(gc, GL_INVALID_OPERATION);
        return;
    }

    COMMON_ARRAY_DATA_INIT( a, pointer, type, stride, size, normalized, 8,
			    opcode );

    true_immediate_size = __glXTypeSize(type) * true_immediate_count;
    ((uint16_t *) (a)->header)[0] = __GLX_PAD(a->header_size 
					      + true_immediate_size);

    if ( a->enabled ) {
	arrays->array_info_cache_valid = GL_FALSE;
    }
}


/**
 * I don't have 100% confidence that this is correct.  The different rules
 * about whether or not generic vertex attributes alias "classic" vertex
 * attributes (i.e., attrib1 ?= primary color) between ARB_vertex_program,
 * ARB_vertex_shader, and NV_vertex_program are a bit confusing.  My
 * feeling is that the client-side doesn't have to worry about it.  The
 * client just sends all the data to the server and lets the server deal
 * with it.
 */
void __indirect_glVertexAttribPointerNV( GLuint index, GLint size,
					 GLenum type, GLsizei stride,
					 const GLvoid * pointer)
{
    __GLXcontext *gc = __glXGetCurrentContext();
    GLboolean normalized = GL_FALSE;


    switch( type ) {
    case GL_UNSIGNED_BYTE:
	if ( size != 4 ) {
	    __glXSetError(gc, GL_INVALID_VALUE);
	    return;
	}
	normalized = GL_TRUE;

    case GL_SHORT:
    case GL_FLOAT:
    case GL_DOUBLE:
	__indirect_glVertexAttribPointerARB(index, size, type,
					    normalized,
					    stride, pointer);
	return;
    default:
	__glXSetError(gc, GL_INVALID_ENUM);
	return;
    }
}


void __indirect_glClientActiveTextureARB(GLenum texture)
{
    __GLXcontext * const gc = __glXGetCurrentContext();
    __GLXattribute * const state = (__GLXattribute *)(gc->client_state_private);
    struct array_state_vector * const arrays = state->array_state;
    const GLint unit = (GLint) texture - GL_TEXTURE0;


    if ( (unit < 0) || (unit >= arrays->num_texture_units) ) {
	__glXSetError(gc, GL_INVALID_ENUM);
	return;
    }

    arrays->active_texture_unit = unit;
}


/**
 * Modify the enable state for the selected array
 */
GLboolean
__glXSetArrayEnable(__GLXattribute *state, GLenum key, unsigned index,
                    GLboolean enable)
{
    struct array_state_vector * arrays = state->array_state;
    struct array_state * a;
    

    /* Texture coordinate arrays have an implict index set when the
     * application calls glClientActiveTexture.
     */
    if (key == GL_TEXTURE_COORD_ARRAY) {
        index = arrays->active_texture_unit;
    }

    a = get_array_entry( arrays, key, index );

    if ( (a != NULL) && (a->enabled != enable) ) {
	a->enabled = enable;
	arrays->array_info_cache_valid = GL_FALSE;
    }

    return (a != NULL);
}


void
__glXArrayDisableAll( __GLXattribute * state )
{
    struct array_state_vector * arrays = state->array_state;
    unsigned  i;


    for ( i = 0 ; i < arrays->num_arrays ; i++ ) {
	arrays->arrays[i].enabled = GL_FALSE;
    }

    arrays->array_info_cache_valid = GL_FALSE;
}


/**
 */
GLboolean
__glXGetArrayEnable( const __GLXattribute * const state,
		     GLenum key, unsigned index, GLintptr * dest )
{
    const struct array_state_vector * arrays = state->array_state;
    const struct array_state * a = get_array_entry( (struct array_state_vector *) arrays,
						    key, index );

    if ( a != NULL ) {
	*dest = (GLintptr) a->enabled;
    }

    return (a != NULL);
}


/**
 */
GLboolean
__glXGetArrayType( const __GLXattribute * const state,
		     GLenum key, unsigned index, GLintptr * dest )
{
    const struct array_state_vector * arrays = state->array_state;
    const struct array_state * a = get_array_entry( (struct array_state_vector *) arrays,
						    key, index );

    if ( a != NULL ) {
	*dest = (GLintptr) a->data_type;
    }

    return (a != NULL);
}


/**
 */
GLboolean
__glXGetArraySize( const __GLXattribute * const state,
		     GLenum key, unsigned index, GLintptr * dest )
{
    const struct array_state_vector * arrays = state->array_state;
    const struct array_state * a = get_array_entry( (struct array_state_vector *) arrays,
						    key, index );

    if ( a != NULL ) {
	*dest = (GLintptr) a->count;
    }

    return (a != NULL);
}


/**
 */
GLboolean
__glXGetArrayStride( const __GLXattribute * const state,
		     GLenum key, unsigned index, GLintptr * dest )
{
    const struct array_state_vector * arrays = state->array_state;
    const struct array_state * a = get_array_entry( (struct array_state_vector *) arrays,
						    key, index );

    if ( a != NULL ) {
	*dest = (GLintptr) a->user_stride;
    }

    return (a != NULL);
}


/**
 */
GLboolean
__glXGetArrayPointer( const __GLXattribute * const state,
		      GLenum key, unsigned index, void ** dest )
{
    const struct array_state_vector * arrays = state->array_state;
    const struct array_state * a = get_array_entry( (struct array_state_vector *) arrays,
						    key, index );


    if ( a != NULL ) {
	*dest = (void *) (a->data);
    }

    return (a != NULL);
}


/**
 */
GLboolean
__glXGetArrayNormalized( const __GLXattribute * const state,
			 GLenum key, unsigned index, GLintptr * dest )
{
    const struct array_state_vector * arrays = state->array_state;
    const struct array_state * a = get_array_entry( (struct array_state_vector *) arrays,
						    key, index );


    if ( a != NULL ) {
	*dest = (GLintptr) a->normalized;
    }

    return (a != NULL);
}


/**
 */
GLuint
__glXGetActiveTextureUnit( const __GLXattribute * const state )
{
    return state->array_state->active_texture_unit;
}


void
__glXPushArrayState( __GLXattribute * state )
{
    struct array_state_vector * arrays = state->array_state;
    struct array_stack_state * stack = & arrays->stack[ (arrays->stack_index * arrays->num_arrays)];
    unsigned  i;

    /* XXX are we pushing _all_ the necessary fields? */
    for ( i = 0 ; i < arrays->num_arrays ; i++ ) {
	stack[i].data = arrays->arrays[i].data;
	stack[i].data_type = arrays->arrays[i].data_type;
	stack[i].user_stride = arrays->arrays[i].user_stride;
	stack[i].count = arrays->arrays[i].count;
	stack[i].key = arrays->arrays[i].key;
        stack[i].index = arrays->arrays[i].index;
	stack[i].enabled = arrays->arrays[i].enabled;
    }

    arrays->active_texture_unit_stack[ arrays->stack_index ] =
      arrays->active_texture_unit;

    arrays->stack_index++;
}


void
__glXPopArrayState( __GLXattribute * state )
{
    struct array_state_vector * arrays = state->array_state;
    struct array_stack_state * stack;
    unsigned  i;


    arrays->stack_index--;
    stack = & arrays->stack[ (arrays->stack_index * arrays->num_arrays) ];

    for ( i = 0 ; i < arrays->num_arrays ; i++ ) {
	switch ( stack[i].key ) {
	case GL_NORMAL_ARRAY:
	    __indirect_glNormalPointer( stack[i].data_type,
					stack[i].user_stride,
					stack[i].data );
	    break;
	case GL_COLOR_ARRAY:
	    __indirect_glColorPointer( stack[i].count,
				       stack[i].data_type,
				       stack[i].user_stride,
				       stack[i].data );
	    break;
	case GL_INDEX_ARRAY:
	    __indirect_glIndexPointer( stack[i].data_type,
				       stack[i].user_stride,
				       stack[i].data );
	    break;
	case GL_EDGE_FLAG_ARRAY:
	    __indirect_glEdgeFlagPointer( stack[i].user_stride,
					  stack[i].data );
	    break;
	case GL_TEXTURE_COORD_ARRAY:
	    arrays->active_texture_unit = stack[i].index;
	    __indirect_glTexCoordPointer( stack[i].count,
					  stack[i].data_type,
					  stack[i].user_stride,
					  stack[i].data );
	    break;
	case GL_SECONDARY_COLOR_ARRAY:
	    __indirect_glSecondaryColorPointerEXT( stack[i].count,
						   stack[i].data_type,
						   stack[i].user_stride,
						   stack[i].data );
	    break;
	case GL_FOG_COORDINATE_ARRAY:
	    __indirect_glFogCoordPointerEXT( stack[i].data_type,
					     stack[i].user_stride,
					     stack[i].data );
	    break;

	}
	
	__glXSetArrayEnable( state, stack[i].key, stack[i].index,
			     stack[i].enabled );
    }

    arrays->active_texture_unit = 
      arrays->active_texture_unit_stack[ arrays->stack_index ];
}