text: /**************************************************************************
   * 
   * 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 INTELCONTEXT_INC
  #define INTELCONTEXT_INC
  
  
  #include <stdbool.h>
  #include "main/mtypes.h"
  #include "main/mm.h"
  
  #ifdef __cplusplus
  extern "C" {
  	/* Evil hack for using libdrm in a c++ compiler. */
  	#define virtual virt
  #endif
  
  #include "drm.h"
  #include "intel_bufmgr.h"
  
  #include "intel_screen.h"
  #include "intel_tex_obj.h"
  #include "i915_drm.h"
  
  #ifdef __cplusplus
  	#undef virtual
  }
  #endif
  
  #include "tnl/t_vertex.h"
  
  #define TAG(x) intel##x
  #include "tnl_dd/t_dd_vertex.h"
  #undef TAG
  
  #define DV_PF_555  (1<<8)
  #define DV_PF_565  (2<<8)
  #define DV_PF_8888 (3<<8)
  #define DV_PF_4444 (8<<8)
  #define DV_PF_1555 (9<<8)
  
  struct intel_region;
  struct intel_context;
  
  typedef void (*intel_tri_func) (struct intel_context *, intelVertex *,
                                  intelVertex *, intelVertex *);
  typedef void (*intel_line_func) (struct intel_context *, intelVertex *,
                                   intelVertex *);
  typedef void (*intel_point_func) (struct intel_context *, intelVertex *);
  
  /**
   * Bits for intel->Fallback field
   */
  /*@{*/
  #define INTEL_FALLBACK_DRAW_BUFFER	 0x1
  #define INTEL_FALLBACK_READ_BUFFER	 0x2
  #define INTEL_FALLBACK_DEPTH_BUFFER      0x4
  #define INTEL_FALLBACK_STENCIL_BUFFER    0x8
  #define INTEL_FALLBACK_USER		 0x10
  #define INTEL_FALLBACK_RENDERMODE	 0x20
  #define INTEL_FALLBACK_TEXTURE   	 0x40
  #define INTEL_FALLBACK_DRIVER            0x1000  /**< first for drivers */
  /*@}*/
  
  extern void intelFallback(struct intel_context *intel, GLbitfield bit,
                            GLboolean mode);
  #define FALLBACK( intel, bit, mode ) intelFallback( intel, bit, mode )
  
  
  #define INTEL_WRITE_PART  0x1
  #define INTEL_WRITE_FULL  0x2
  #define INTEL_READ        0x4
  
  #define INTEL_MAX_FIXUP 64
  
  #ifndef likely
  #ifdef __GNUC__
  #define likely(expr) (__builtin_expect(expr, 1))
  #define unlikely(expr) (__builtin_expect(expr, 0))
  #else
  #define likely(expr) (expr)
  #define unlikely(expr) (expr)
  #endif
  #endif
  
  struct intel_sync_object {
     struct gl_sync_object Base;
  
     /** Batch associated with this sync object */
     drm_intel_bo *bo;
  };
  
  /**
   * intel_context is derived from Mesa's context class: struct gl_context.
   */
  struct intel_context
  {
     struct gl_context ctx;  /**< base class, must be first field */
  
     struct
     {
        void (*destroy) (struct intel_context * intel);
        void (*emit_state) (struct intel_context * intel);
        void (*finish_batch) (struct intel_context * intel);
        void (*new_batch) (struct intel_context * intel);
        void (*emit_invarient_state) (struct intel_context * intel);
        void (*update_texture_state) (struct intel_context * intel);
  
        void (*render_start) (struct intel_context * intel);
        void (*render_prevalidate) (struct intel_context * intel);
        void (*set_draw_region) (struct intel_context * intel,
                                 struct intel_region * draw_regions[],
                                 struct intel_region * depth_region,
  			       GLuint num_regions);
        void (*update_draw_buffer)(struct intel_context *intel);
  
        void (*reduced_primitive_state) (struct intel_context * intel,
                                         GLenum rprim);
  
        GLboolean (*check_vertex_size) (struct intel_context * intel,
  				      GLuint expected);
        void (*invalidate_state) (struct intel_context *intel,
  				GLuint new_state);
  
        void (*assert_not_dirty) (struct intel_context *intel);
  
        void (*debug_batch)(struct intel_context *intel);
        bool (*render_target_supported)(gl_format format);
  
        /** Can HiZ be enabled on a depthbuffer of the given format? */
        bool (*is_hiz_depth_format)(struct intel_context *intel,
  	                          gl_format format);
     } vtbl;
  
     GLbitfield Fallback;  /**< mask of INTEL_FALLBACK_x bits */
     GLuint NewGLState;
  
     dri_bufmgr *bufmgr;
     unsigned int maxBatchSize;
  
     /**
      * Generation number of the hardware: 2 is 8xx, 3 is 9xx pre-965, 4 is 965.
      */
     int gen;
     GLboolean needs_ff_sync;
     GLboolean is_g4x;
     GLboolean is_945;
     GLboolean has_luminance_srgb;
     GLboolean has_xrgb_textures;
     GLboolean has_separate_stencil;
     GLboolean must_use_separate_stencil;
     GLboolean has_hiz;
  
     int urb_size;
  
     struct intel_batchbuffer {
        /** Current batchbuffer being queued up. */
        drm_intel_bo *bo;
        /** Last BO submitted to the hardware.  Used for glFinish(). */
        drm_intel_bo *last_bo;
        /** BO for post-sync nonzero writes for gen6 workaround. */
        drm_intel_bo *workaround_bo;
        bool need_workaround_flush;
  
        struct cached_batch_item *cached_items;
  
        uint16_t emit, total;
        uint16_t used, reserved_space;
        uint32_t map[8192];
  #define BATCH_SZ (8192*sizeof(uint32_t))
  
        uint32_t state_batch_offset;
        bool is_blit;
     } batch;
  
     drm_intel_bo *first_post_swapbuffers_batch;
     GLboolean need_throttle;
     GLboolean no_batch_wrap;
     bool tnl_pipeline_running; /**< Set while i915's _tnl_run_pipeline. */
  
     struct
     {
        GLuint id;
        uint32_t start_ptr; /**< for i8xx */
        uint32_t primitive;	/**< Current hardware primitive type */
        void (*flush) (struct intel_context *);
        drm_intel_bo *vb_bo;
        uint8_t *vb;
        unsigned int start_offset; /**< Byte offset of primitive sequence */
        unsigned int current_offset; /**< Byte offset of next vertex */
        unsigned int count;	/**< Number of vertices in current primitive */
     } prim;
  
     struct {
        drm_intel_bo *bo;
        GLuint offset;
        uint32_t buffer_len;
        uint32_t buffer_offset;
        char buffer[4096];
     } upload;
  
     GLuint stats_wm;
  
     /* Offsets of fields within the current vertex:
      */
     GLuint coloroffset;
     GLuint specoffset;
     GLuint wpos_offset;
  
     struct tnl_attr_map vertex_attrs[VERT_ATTRIB_MAX];
     GLuint vertex_attr_count;
  
     GLfloat polygon_offset_scale;        /* dependent on depth_scale, bpp */
  
     GLboolean hw_stencil;
     GLboolean hw_stipple;
     GLboolean depth_buffer_is_float;
     GLboolean no_rast;
     GLboolean always_flush_batch;
     GLboolean always_flush_cache;
  
     /* 0 - nonconformant, best performance;
      * 1 - fallback to sw for known conformance bugs
      * 2 - always fallback to sw
      */
     GLuint conformance_mode;
  
     /* State for intelvb.c and inteltris.c.
      */
     GLuint RenderIndex;
     GLmatrix ViewportMatrix;
     GLenum render_primitive;
     GLenum reduced_primitive;
     GLuint vertex_size;
     GLubyte *verts;              /* points to tnl->clipspace.vertex_buf */
  
     /* Fallback rasterization functions 
      */
     intel_point_func draw_point;
     intel_line_func draw_line;
     intel_tri_func draw_tri;
  
     /**
      * Set if rendering has occured to the drawable's front buffer.
      *
      * This is used in the DRI2 case to detect that glFlush should also copy
      * the contents of the fake front buffer to the real front buffer.
      */
     GLboolean front_buffer_dirty;
  
     /**
      * Track whether front-buffer rendering is currently enabled
      *
      * A separate flag is used to track this in order to support MRT more
      * easily.
      */
     GLboolean is_front_buffer_rendering;
     /**
      * Track whether front-buffer is the current read target.
      *
      * This is closely associated with is_front_buffer_rendering, but may
      * be set separately.  The DRI2 fake front buffer must be referenced
      * either way.
      */
     GLboolean is_front_buffer_reading;
  
     GLboolean use_texture_tiling;
     GLboolean use_early_z;
  
     int driFd;
  
     __DRIcontext *driContext;
     struct intel_screen *intelScreen;
     void (*saved_viewport)(struct gl_context * ctx,
  			  GLint x, GLint y, GLsizei width, GLsizei height);
  
     /**
      * Configuration cache
      */
     driOptionCache optionCache;
  };
  
  extern char *__progname;
  
  
  #define SUBPIXEL_X 0.125
  #define SUBPIXEL_Y 0.125
  
  #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
  
  /**
   * Align a value up to an alignment value
   *
   * If \c value is not already aligned to the requested alignment value, it
   * will be rounded up.
   *
   * \param value  Value to be rounded
   * \param alignment  Alignment value to be used.  This must be a power of two.
   *
   * \sa ROUND_DOWN_TO()
   */
  #define ALIGN(value, alignment)  (((value) + alignment - 1) & ~(alignment - 1))
  
  /**
   * Align a value down to an alignment value
   *
   * If \c value is not already aligned to the requested alignment value, it
   * will be rounded down.
   *
   * \param value  Value to be rounded
   * \param alignment  Alignment value to be used.  This must be a power of two.
   *
   * \sa ALIGN()
   */
  #define ROUND_DOWN_TO(value, alignment) ((value) & ~(alignment - 1))
  
  #define IS_POWER_OF_TWO(val) (((val) & (val - 1)) == 0)
  
  static INLINE uint32_t
  U_FIXED(float value, uint32_t frac_bits)
  {
     value *= (1 << frac_bits);
     return value < 0 ? 0 : value;
  }
  
  static INLINE uint32_t
  S_FIXED(float value, uint32_t frac_bits)
  {
     return value * (1 << frac_bits);
  }
  
  #define INTEL_FIREVERTICES(intel)		\
  do {						\
     if ((intel)->prim.flush)			\
        (intel)->prim.flush(intel);		\
  } while (0)
  
  /* ================================================================
   * From linux kernel i386 header files, copes with odd sizes better
   * than COPY_DWORDS would:
   * XXX Put this in src/mesa/main/imports.h ???
   */
  #if defined(i386) || defined(__i386__)
  static INLINE void * __memcpy(void * to, const void * from, size_t n)
  {
     int d0, d1, d2;
     __asm__ __volatile__(
        "rep ; movsl\n\t"
        "testb $2,%b4\n\t"
        "je 1f\n\t"
        "movsw\n"
        "1:\ttestb $1,%b4\n\t"
        "je 2f\n\t"
        "movsb\n"
        "2:"
        : "=&c" (d0), "=&D" (d1), "=&S" (d2)
        :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from)
        : "memory");
     return (to);
  }
  #else
  #define __memcpy(a,b,c) memcpy(a,b,c)
  #endif
  
  
  /* ================================================================
   * Debugging:
   */
  extern int INTEL_DEBUG;
  
  #define DEBUG_TEXTURE	0x1
  #define DEBUG_STATE	0x2
  #define DEBUG_IOCTL	0x4
  #define DEBUG_BLIT	0x8
  #define DEBUG_MIPTREE   0x10
  #define DEBUG_FALLBACKS	0x20
  #define DEBUG_VERBOSE	0x40
  #define DEBUG_BATCH     0x80
  #define DEBUG_PIXEL     0x100
  #define DEBUG_BUFMGR    0x200
  #define DEBUG_REGION    0x400
  #define DEBUG_FBO       0x800
  #define DEBUG_GS        0x1000
  #define DEBUG_SYNC	0x2000
  #define DEBUG_PRIMS	0x4000
  #define DEBUG_VERTS	0x8000
  #define DEBUG_DRI       0x10000
  #define DEBUG_SF        0x20000
  #define DEBUG_SANITY    0x40000
  #define DEBUG_SLEEP     0x80000
  #define DEBUG_STATS     0x100000
  #define DEBUG_TILE      0x200000
  #define DEBUG_SINGLE_THREAD   0x400000
  #define DEBUG_WM        0x800000
  #define DEBUG_URB       0x1000000
  #define DEBUG_VS        0x2000000
  #define DEBUG_CLIP      0x8000000
  
  #define DBG(...) do {						\
  	if (unlikely(INTEL_DEBUG & FILE_DEBUG_FLAG))		\
  		printf(__VA_ARGS__);			\
  } while(0)
  
  #define fallback_debug(...) do {				\
  	if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))		\
  		printf(__VA_ARGS__);				\
  } while(0)
  
  #define PCI_CHIP_845_G			0x2562
  #define PCI_CHIP_I830_M			0x3577
  #define PCI_CHIP_I855_GM		0x3582
  #define PCI_CHIP_I865_G			0x2572
  #define PCI_CHIP_I915_G			0x2582
  #define PCI_CHIP_I915_GM		0x2592
  #define PCI_CHIP_I945_G			0x2772
  #define PCI_CHIP_I945_GM		0x27A2
  #define PCI_CHIP_I945_GME		0x27AE
  #define PCI_CHIP_G33_G			0x29C2
  #define PCI_CHIP_Q35_G			0x29B2
  #define PCI_CHIP_Q33_G			0x29D2
  
  
  /* ================================================================
   * intel_context.c:
   */
  
  extern GLboolean intelInitContext(struct intel_context *intel,
  				  int api,
                                    const struct gl_config * mesaVis,
                                    __DRIcontext * driContextPriv,
                                    void *sharedContextPrivate,
                                    struct dd_function_table *functions);
  
  extern void intelFinish(struct gl_context * ctx);
  extern void intel_flush(struct gl_context * ctx);
  
  extern void intelInitDriverFunctions(struct dd_function_table *functions);
  
  void intel_init_syncobj_functions(struct dd_function_table *functions);
  
  
  /* ================================================================
   * intel_state.c:
   */
  extern void intelInitStateFuncs(struct dd_function_table *functions);
  
  #define COMPAREFUNC_ALWAYS		0
  #define COMPAREFUNC_NEVER		0x1
  #define COMPAREFUNC_LESS		0x2
  #define COMPAREFUNC_EQUAL		0x3
  #define COMPAREFUNC_LEQUAL		0x4
  #define COMPAREFUNC_GREATER		0x5
  #define COMPAREFUNC_NOTEQUAL		0x6
  #define COMPAREFUNC_GEQUAL		0x7
  
  #define STENCILOP_KEEP			0
  #define STENCILOP_ZERO			0x1
  #define STENCILOP_REPLACE		0x2
  #define STENCILOP_INCRSAT		0x3
  #define STENCILOP_DECRSAT		0x4
  #define STENCILOP_INCR			0x5
  #define STENCILOP_DECR			0x6
  #define STENCILOP_INVERT		0x7
  
  #define LOGICOP_CLEAR			0
  #define LOGICOP_NOR			0x1
  #define LOGICOP_AND_INV 		0x2
  #define LOGICOP_COPY_INV		0x3
  #define LOGICOP_AND_RVRSE		0x4
  #define LOGICOP_INV			0x5
  #define LOGICOP_XOR			0x6
  #define LOGICOP_NAND			0x7
  #define LOGICOP_AND			0x8
  #define LOGICOP_EQUIV			0x9
  #define LOGICOP_NOOP			0xa
  #define LOGICOP_OR_INV			0xb
  #define LOGICOP_COPY			0xc
  #define LOGICOP_OR_RVRSE		0xd
  #define LOGICOP_OR			0xe
  #define LOGICOP_SET			0xf
  
  #define BLENDFACT_ZERO			0x01
  #define BLENDFACT_ONE			0x02
  #define BLENDFACT_SRC_COLR		0x03
  #define BLENDFACT_INV_SRC_COLR 		0x04
  #define BLENDFACT_SRC_ALPHA		0x05
  #define BLENDFACT_INV_SRC_ALPHA 	0x06
  #define BLENDFACT_DST_ALPHA		0x07
  #define BLENDFACT_INV_DST_ALPHA 	0x08
  #define BLENDFACT_DST_COLR		0x09
  #define BLENDFACT_INV_DST_COLR		0x0a
  #define BLENDFACT_SRC_ALPHA_SATURATE	0x0b
  #define BLENDFACT_CONST_COLOR		0x0c
  #define BLENDFACT_INV_CONST_COLOR	0x0d
  #define BLENDFACT_CONST_ALPHA		0x0e
  #define BLENDFACT_INV_CONST_ALPHA	0x0f
  #define BLENDFACT_MASK          	0x0f
  
  enum {
     DRI_CONF_BO_REUSE_DISABLED,
     DRI_CONF_BO_REUSE_ALL
  };
  
  extern int intel_translate_shadow_compare_func(GLenum func);
  extern int intel_translate_compare_func(GLenum func);
  extern int intel_translate_stencil_op(GLenum op);
  extern int intel_translate_blend_factor(GLenum factor);
  extern int intel_translate_logic_op(GLenum opcode);
  
  void intel_update_renderbuffers(__DRIcontext *context,
  				__DRIdrawable *drawable);
  void intel_prepare_render(struct intel_context *intel);
  
  void i915_set_buf_info_for_region(uint32_t *state, struct intel_region *region,
  				  uint32_t buffer_id);
  
  /*======================================================================
   * Inline conversion functions.  
   * These are better-typed than the macros used previously:
   */
  static INLINE struct intel_context *
  intel_context(struct gl_context * ctx)
  {
     return (struct intel_context *) ctx;
  }
  
  static INLINE GLboolean
  is_power_of_two(uint32_t value)
  {
     return (value & (value - 1)) == 0;
  }
  
  #endif
  