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+/*
+ * (C) Copyright IBM Corporation 2004, 2005
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
+ * IBM,
+ * AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _INDIRECT_VA_PRIVATE_
+#define _INDIRECT_VA_PRIVATE_
+
+/**
+ * \file indirect_va_private.h
+ *
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+#include <inttypes.h>
+
+#include "glxclient.h"
+#include "indirect.h"
+#include <GL/glxproto.h>
+
+
+/**
+ * State descriptor for a single array of vertex data.
+ */
+struct array_state {
+ /**
+ * Pointer to the application supplied data.
+ */
+ const void * data;
+
+ /**
+ * Enum representing the type of the application supplied data.
+ */
+ GLenum data_type;
+
+ /**
+ * Stride value supplied by the application. This value is not used
+ * internally. It is only kept so that it can be queried by the
+ * application using glGet*v.
+ */
+ GLsizei user_stride;
+
+ /**
+ * Calculated size, in bytes, of a single element in the array. This
+ * is calculated based on \c count and the size of the data type
+ * represented by \c data_type.
+ */
+ GLsizei element_size;
+
+ /**
+ * Actual byte-stride from one element to the next. This value will
+ * be equal to either \c user_stride or \c element_stride.
+ */
+ GLsizei true_stride;
+
+ /**
+ * Number of data values in each element.
+ */
+ GLint count;
+
+ /**
+ * "Normalized" data is on the range [0,1] (unsigned) or [-1,1] (signed).
+ * This is used for mapping integral types to floating point types.
+ */
+ GLboolean normalized;
+
+ /**
+ * Pre-calculated GLX protocol command header.
+ */
+ uint32_t header[2];
+
+ /**
+ * Size of the header data. For simple data, like glColorPointerfv,
+ * this is 4. For complex data that requires either a count (e.g.,
+ * glWeightfvARB), an index (e.g., glVertexAttrib1fvARB), or a
+ * selector enum (e.g., glMultiTexCoord2fv) this is 8.
+ */
+ unsigned header_size;
+
+ /**
+ * Set to \c GL_TRUE if this array is enabled. Otherwise, it is set
+ * to \c GL_FALSE.
+ */
+ GLboolean enabled;
+
+ /**
+ * For multi-arrayed data (e.g., texture coordinates, generic vertex
+ * program attributes, etc.), this specifies which array this is.
+ */
+ unsigned index;
+
+ /**
+ * Per-array-type key. For most arrays, this will be the GL enum for
+ * that array (e.g., GL_VERTEX_ARRAY for vertex data, GL_NORMAL_ARRAY
+ * for normal data, GL_TEXTURE_COORD_ARRAY for texture coordinate data,
+ * etc.).
+ */
+ GLenum key;
+
+ /**
+ * If this array can be used with the "classic" \c glDrawArrays protocol,
+ * this is set to \c GL_TRUE. Otherwise, it is set to \c GL_FALSE.
+ */
+ GLboolean old_DrawArrays_possible;
+};
+
+
+/**
+ * Array state that is pushed / poped by \c glPushClientAttrib and
+ * \c glPopClientAttrib.
+ */
+struct array_stack_state {
+ /**
+ * Pointer to the application supplied data.
+ */
+ const void * data;
+
+ /**
+ * Enum representing the type of the application supplied data.
+ */
+ GLenum data_type;
+
+ /**
+ * Stride value supplied by the application. This value is not used
+ * internally. It is only kept so that it can be queried by the
+ * application using glGet*v.
+ */
+ GLsizei user_stride;
+
+ /**
+ * Number of data values in each element.
+ */
+ GLint count;
+
+ /**
+ * Per-array-type key. For most arrays, this will be the GL enum for
+ * that array (e.g., GL_VERTEX_ARRAY for vertex data, GL_NORMAL_ARRAY
+ * for normal data, GL_TEXTURE_COORD_ARRAY for texture coordinate data,
+ * etc.).
+ */
+ GLenum key;
+
+ /**
+ * For multi-arrayed data (e.g., texture coordinates, generic vertex
+ * program attributes, etc.), this specifies which array this is.
+ */
+ unsigned index;
+
+ /**
+ * Set to \c GL_TRUE if this array is enabled. Otherwise, it is set
+ * to \c GL_FALSE.
+ */
+ GLboolean enabled;
+};
+
+
+/**
+ * Collection of all the vertex array state.
+ */
+struct array_state_vector {
+ /**
+ * Number of arrays tracked by \c ::arrays.
+ */
+ size_t num_arrays;
+
+ /**
+ * Array of vertex array state. This array contains all of the valid
+ * vertex arrays. If a vertex array isn't in this array, then it isn't
+ * valid. For example, if an implementation does not support
+ * EXT_fog_coord, there won't be a GL_FOG_COORD_ARRAY entry in this
+ * array.
+ */
+ struct array_state * arrays;
+
+ /**
+ * Number of currently enabled client-side arrays. The value of this
+ * field is only valid if \c array_info_cache_valid is true.
+ */
+ size_t enabled_client_array_count;
+
+ /**
+ * \name ARRAY_INFO cache.
+ *
+ * These fields track the state of the ARRAY_INFO cache. The
+ * \c array_info_cache_size is the size of the actual data stored in
+ * \c array_info_cache. \c array_info_cache_buffer_size is the size of
+ * the buffer. This will always be greater than or equal to
+ * \c array_info_cache_size.
+ *
+ * \note
+ * There are some bytes of extra data before \c array_info_cache that is
+ * used to hold the header for RenderLarge commands. This is
+ * \b not included in \c array_info_cache_size or
+ * \c array_info_cache_buffer_size. \c array_info_cache_base stores a
+ * pointer to the true start of the buffer (i.e., what malloc returned).
+ */
+ /*@{*/
+ size_t array_info_cache_size;
+ size_t array_info_cache_buffer_size;
+ void * array_info_cache;
+ void * array_info_cache_base;
+ /*@}*/
+
+
+ /**
+ * Is the cache of ARRAY_INFO data valid? The cache can become invalid
+ * when one of several state changes occur. Among these chages are
+ * modifying the array settings for an enabled array and enabling /
+ * disabling an array.
+ */
+ GLboolean array_info_cache_valid;
+
+ /**
+ * Is it possible to use the GL 1.1 / EXT_vertex_arrays protocol? Use
+ * of this protocol is disabled with really old servers (i.e., servers
+ * that don't support GL 1.1 or EXT_vertex_arrays) or when an environment
+ * variable is set.
+ *
+ * \todo
+ * GL 1.1 and EXT_vertex_arrays use identical protocol, but have different
+ * opcodes for \c glDrawArrays. For servers that advertise one or the
+ * other, there should be a way to select which opcode to use.
+ */
+ GLboolean old_DrawArrays_possible;
+
+ /**
+ * Is it possible to use the new GL X.X / ARB_vertex_buffer_object
+ * protocol?
+ *
+ * \todo
+ * This protocol has not yet been defined by the ARB, but is currently a
+ * work in progress. This field is a place-holder.
+ */
+ GLboolean new_DrawArrays_possible;
+
+ /**
+ * Active texture unit set by \c glClientActiveTexture.
+ *
+ * \sa __glXGetActiveTextureUnit
+ */
+ unsigned active_texture_unit;
+
+ /**
+ * Number of supported texture units. Even if ARB_multitexture /
+ * GL 1.3 are not supported, this will be at least 1. When multitexture
+ * is supported, this will be the value queried by calling
+ * \c glGetIntegerv with \c GL_MAX_TEXTURE_UNITS.
+ *
+ * \todo
+ * Investigate if this should be the value of \c GL_MAX_TEXTURE_COORDS
+ * instead (if GL 2.0 / ARB_fragment_shader / ARB_fragment_program /
+ * NV_fragment_program are supported).
+ */
+ unsigned num_texture_units;
+
+ /**
+ * Number of generic vertex program attribs. If GL_ARB_vertex_program
+ * is not supported, this will be zero. Otherwise it will be the value
+ * queries by calling \c glGetProgramiv with \c GL_VERTEX_PROGRAM_ARB
+ * and \c GL_MAX_PROGRAM_ATTRIBS_ARB.
+ */
+ unsigned num_vertex_program_attribs;
+
+ /**
+ * \n Methods for implementing various GL functions.
+ *
+ * These method pointers are only valid \c array_info_cache_valid is set.
+ * When each function starts, it much check \c array_info_cache_valid.
+ * If it is not set, it must call \c fill_array_info_cache and call
+ * the new method.
+ *
+ * \sa fill_array_info_cache
+ *
+ * \todo
+ * Write code to plug these functions directly into the dispatch table.
+ */
+ /*@{*/
+ void (*DrawArrays)( GLenum, GLint, GLsizei );
+ void (*DrawElements)( GLenum mode, GLsizei count, GLenum type,
+ const GLvoid *indices );
+ /*@}*/
+
+ struct array_stack_state * stack;
+ unsigned active_texture_unit_stack[ __GL_CLIENT_ATTRIB_STACK_DEPTH ];
+ unsigned stack_index;
+};
+
+#endif /* _INDIRECT_VA_PRIVATE_ */