/*
 * Cogl
 *
 * A Low Level GPU Graphics and Utilities API
 *
 * Copyright (C) 2010 Intel Corporation.
 *
 * 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, sublicense, 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 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
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * 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.
 *
 *
 *
 * Authors:
 *   Robert Bragg <robert@linux.intel.com>
 */

#pragma once

#include "cogl/cogl-object-private.h"
#include "cogl/cogl-attribute.h"
#include "cogl/cogl-framebuffer.h"
#include "cogl/cogl-pipeline-private.h"
#include "cogl/cogl-boxed-value.h"

typedef enum
{
  COGL_ATTRIBUTE_NAME_ID_POSITION_ARRAY,
  COGL_ATTRIBUTE_NAME_ID_COLOR_ARRAY,
  COGL_ATTRIBUTE_NAME_ID_TEXTURE_COORD_ARRAY,
  COGL_ATTRIBUTE_NAME_ID_NORMAL_ARRAY,
  COGL_ATTRIBUTE_NAME_ID_POINT_SIZE_ARRAY,
  COGL_ATTRIBUTE_NAME_ID_CUSTOM_ARRAY
} CoglAttributeNameID;

typedef struct _CoglAttributeNameState
{
  const char *name;
  CoglAttributeNameID name_id;
  int name_index;
  gboolean normalized_default;
  int layer_number;
} CoglAttributeNameState;

struct _CoglAttribute
{
  CoglObject _parent;

  const CoglAttributeNameState *name_state;
  gboolean normalized;

  gboolean is_buffered;

  union {
    struct {
      CoglAttributeBuffer *attribute_buffer;
      size_t stride;
      size_t offset;
      int n_components;
      CoglAttributeType type;
    } buffered;
    struct {
      CoglContext *context;
      CoglBoxedValue boxed;
    } constant;
  } d;

  int immutable_ref;
};

typedef enum
{
  COGL_DRAW_SKIP_JOURNAL_FLUSH = 1 << 0,
  COGL_DRAW_SKIP_PIPELINE_VALIDATION = 1 << 1,
  COGL_DRAW_SKIP_FRAMEBUFFER_FLUSH = 1 << 2,
  /* By default the vertex attribute drawing code will assume that if
     there is a color attribute array enabled then we can't determine
     if the colors will be opaque so we need to enabling
     blending. However when drawing from the journal we know what the
     contents of the color array is so we can override this by passing
     this flag. */
  COGL_DRAW_COLOR_ATTRIBUTE_IS_OPAQUE = 1 << 3,
  /* This forcibly disables the debug option to divert all drawing to
   * wireframes */
  COGL_DRAW_SKIP_DEBUG_WIREFRAME = 1 << 4
} CoglDrawFlags;

/* During CoglContext initialization we register the "cogl_color_in"
 * attribute name so it gets a global name_index of 0. We need to know
 * the name_index for "cogl_color_in" in
 * _cogl_pipeline_flush_gl_state() */
#define COGL_ATTRIBUTE_COLOR_NAME_INDEX 0

CoglAttributeNameState *
_cogl_attribute_register_attribute_name (CoglContext *context,
                                         const char *name);

CoglAttribute *
_cogl_attribute_immutable_ref (CoglAttribute *attribute);

void
_cogl_attribute_immutable_unref (CoglAttribute *attribute);

typedef struct
{
  int unit;
  CoglPipelineFlushOptions options;
  uint32_t fallback_layers;
} CoglFlushLayerState;

void
_cogl_flush_attributes_state (CoglFramebuffer *framebuffer,
                              CoglPipeline *pipeline,
                              CoglDrawFlags flags,
                              CoglAttribute **attributes,
                              int n_attributes);

int
_cogl_attribute_get_n_components (CoglAttribute *attribute);
