/**************************************************************************
 * 
 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
 * 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 TUNGSTEN GRAPHICS AND/OR ITS 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 I830CONTEXT_INC
#define I830CONTEXT_INC

#include "intel_context.h"

#define I830_FALLBACK_TEXTURE		 0x1000
#define I830_FALLBACK_COLORMASK		 0x2000
#define I830_FALLBACK_STENCIL		 0x4000
#define I830_FALLBACK_STIPPLE		 0x8000
#define I830_FALLBACK_LOGICOP		 0x10000

#define I830_UPLOAD_CTX              0x1
#define I830_UPLOAD_BUFFERS          0x2
#define I830_UPLOAD_STIPPLE          0x4
#define I830_UPLOAD_INVARIENT        0x8
#define I830_UPLOAD_TEX(i)           (0x10<<(i))
#define I830_UPLOAD_TEXBLEND(i)      (0x100<<(i))
#define I830_UPLOAD_TEX_ALL          (0x0f0)
#define I830_UPLOAD_TEXBLEND_ALL     (0xf00)

/* State structure offsets - these will probably disappear.
 */
#define I830_DESTREG_CBUFADDR0 0
#define I830_DESTREG_CBUFADDR1 1
#define I830_DESTREG_DBUFADDR0 2
#define I830_DESTREG_DBUFADDR1 3
#define I830_DESTREG_DV0 4
#define I830_DESTREG_DV1 5
#define I830_DESTREG_SENABLE 6
#define I830_DESTREG_SR0 7
#define I830_DESTREG_SR1 8
#define I830_DESTREG_SR2 9
#define I830_DEST_SETUP_SIZE 10

#define I830_CTXREG_STATE1		0
#define I830_CTXREG_STATE2		1
#define I830_CTXREG_STATE3		2
#define I830_CTXREG_STATE4		3
#define I830_CTXREG_STATE5		4
#define I830_CTXREG_IALPHAB		5
#define I830_CTXREG_STENCILTST		6
#define I830_CTXREG_ENABLES_1		7
#define I830_CTXREG_ENABLES_2		8
#define I830_CTXREG_AA			9
#define I830_CTXREG_FOGCOLOR		10
#define I830_CTXREG_BLENDCOLOR0		11
#define I830_CTXREG_BLENDCOLOR1		12
#define I830_CTXREG_VF			13
#define I830_CTXREG_VF2			14
#define I830_CTXREG_MCSB0		15
#define I830_CTXREG_MCSB1		16
#define I830_CTX_SETUP_SIZE		17

#define I830_STPREG_ST0        0
#define I830_STPREG_ST1        1
#define I830_STP_SETUP_SIZE    2

#define I830_TEXREG_TM0LI      0        /* load immediate 2 texture map n */
#define I830_TEXREG_TM0S1      1
#define I830_TEXREG_TM0S2      2
#define I830_TEXREG_TM0S3      3
#define I830_TEXREG_TM0S4      4
#define I830_TEXREG_MCS	       5        /* _3DSTATE_MAP_COORD_SETS */
#define I830_TEXREG_CUBE       6        /* _3DSTATE_MAP_SUBE */
#define I830_TEX_SETUP_SIZE    7

#define I830_TEXBLEND_SIZE	12      /* (4 args + op) * 2 + COLOR_FACTOR */

struct i830_texture_object
{
   struct intel_texture_object intel;
   GLuint Setup[I830_TEX_SETUP_SIZE];
};

#define I830_TEX_UNITS 4

struct i830_hw_state
{
   GLuint Ctx[I830_CTX_SETUP_SIZE];
   GLuint Buffer[I830_DEST_SETUP_SIZE];
   GLuint Stipple[I830_STP_SETUP_SIZE];
   GLuint Tex[I830_TEX_UNITS][I830_TEX_SETUP_SIZE];
   GLuint TexBlend[I830_TEX_UNITS][I830_TEXBLEND_SIZE];
   GLuint TexBlendWordsUsed[I830_TEX_UNITS];

   struct intel_region *draw_region;
   struct intel_region *depth_region;

   /* Regions aren't actually that appropriate here as the memory may
    * be from a PBO or FBO.  Will have to do this for draw and depth for
    * FBO's...
    */
   dri_bo *tex_buffer[I830_TEX_UNITS];
   GLuint tex_offset[I830_TEX_UNITS];

   GLuint emitted;              /* I810_UPLOAD_* */
   GLuint active;
};

struct i830_context
{
   struct intel_context intel;

   GLuint lodbias_tm0s3[MAX_TEXTURE_UNITS];
     DECLARE_RENDERINPUTS(last_index_bitset);

   struct i830_hw_state meta, initial, state, *current;
};


#define I830_STATECHANGE(i830, flag)				\
do {								\
   INTEL_FIREVERTICES( &i830->intel );				\
   i830->state.emitted &= ~flag;					\
} while (0)

#define I830_ACTIVESTATE(i830, flag, mode)	\
do {						\
   INTEL_FIREVERTICES( &i830->intel );		\
   if (mode)					\
      i830->state.active |= flag;		\
   else						\
      i830->state.active &= ~flag;		\
} while (0)

/* i830_vtbl.c
 */
extern void i830InitVtbl(struct i830_context *i830);

extern void
i830_state_draw_region(struct intel_context *intel,
                       struct i830_hw_state *state,
                       struct intel_region *color_region,
                       struct intel_region *depth_region);
/* i830_context.c
 */
extern GLboolean
i830CreateContext(const __GLcontextModes * mesaVis,
                  __DRIcontextPrivate * driContextPriv,
                  void *sharedContextPrivate);

/* i830_tex.c, i830_texstate.c
 */
extern void i830UpdateTextureState(struct intel_context *intel);

extern void i830InitTextureFuncs(struct dd_function_table *functions);

/* i830_texblend.c
 */
extern GLuint i830SetTexEnvCombine(struct i830_context *i830,
                                   const struct gl_tex_env_combine_state
                                   *combine, GLint blendUnit, GLuint texel_op,
                                   GLuint * state, const GLfloat * factor);

extern void i830EmitTextureBlend(struct i830_context *i830);


/* i830_state.c
 */
extern void i830InitStateFuncs(struct dd_function_table *functions);

extern void i830EmitState(struct i830_context *i830);

extern void i830InitState(struct i830_context *i830);

/* i830_metaops.c
 */
extern void i830InitMetaFuncs(struct i830_context *i830);

/*======================================================================
 * Inline conversion functions.  These are better-typed than the
 * macros used previously:
 */
static INLINE struct i830_context *
i830_context(GLcontext * ctx)
{
   return (struct i830_context *) ctx;
}

#endif