/**

  * $Id: pvr2.h,v 1.28 2007-01-25 10:16:32 nkeynes Exp $

  *

  * PVR2 (video chip) functions and macros.

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * This program is free software; you can redistribute it and/or modify

  * it under the terms of the GNU General Public License as published by

  * the Free Software Foundation; either version 2 of the License, or

  * (at your option) any later version.

  *

  * This program is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  * GNU General Public License for more details.

  */

 #include "dream.h"

 #include "mem.h"

 #include "display.h"

 #include "pvr2/pvr2mmio.h"

 #include <GL/gl.h>

 typedef unsigned int pvraddr_t;

 typedef unsigned int pvr64addr_t;

 #define DISPMODE_DE  0x00000001 /* Display enable */

 #define DISPMODE_SD  0x00000002 /* Scan double */

 #define DISPMODE_COL 0x0000000C /* Colour mode */

 #define DISPMODE_CD  0x08000000 /* Clock double */

 #define COLFMT_RGB15 0x00000000

 #define COLFMT_RGB16 0x00000004

 #define COLFMT_RGB24 0x00000008

 #define COLFMT_RGB32 0x0000000C

 #define DISPSIZE_MODULO 0x3FF00000 /* line skip +1 (32-bit words)*/

 #define DISPSIZE_LPF    0x000FFC00 /* lines per field */

 #define DISPSIZE_PPL    0x000003FF /* pixel words (32 bit) per line */

 #define DISPCFG_VP 0x00000001 /* V-sync polarity */

 #define DISPCFG_HP 0x00000002 /* H-sync polarity */

 #define DISPCFG_I  0x00000010 /* Interlace enable */

 #define DISPCFG_BS 0x000000C0 /* Broadcast standard */

 #define DISPCFG_VO 0x00000100 /* Video output enable */

 #define BS_NTSC 0x00000000

 #define BS_PAL  0x00000040

 #define BS_PALM 0x00000080 /* ? */

 #define BS_PALN 0x000000C0 /* ? */

 #define PVR2_RAM_BASE 0x05000000

 #define PVR2_RAM_BASE_INT 0x04000000

 #define PVR2_RAM_SIZE (8 * 1024 * 1024)

 #define PVR2_RAM_PAGES (PVR2_RAM_SIZE>>12)

 #define PVR2_RAM_MASK 0x7FFFFF

 #define RENDER_ZONLY  0

 #define RENDER_NORMAL 1     /* Render non-modified polygons */

 #define RENDER_CHEAPMOD 2   /* Render cheap-modified polygons */

 #define RENDER_FULLMOD 3    /* Render the fully-modified version of the polygons */

 void pvr2_next_frame( void );

 void pvr2_set_base_address( uint32_t );

 int pvr2_get_frame_count( void );

 gboolean pvr2_save_next_scene( const gchar *filename );

 #define PVR2_CMD_END_OF_LIST 0x00

 #define PVR2_CMD_USER_CLIP   0x20

 #define PVR2_CMD_POLY_OPAQUE 0x80

 #define PVR2_CMD_MOD_OPAQUE  0x81

 #define PVR2_CMD_POLY_TRANS  0x82

 #define PVR2_CMD_MOD_TRANS   0x83

 #define PVR2_CMD_POLY_PUNCHOUT 0x84

 #define PVR2_CMD_VERTEX      0xE0

 #define PVR2_CMD_VERTEX_LAST 0xF0

 #define PVR2_POLY_TEXTURED 0x00000008

 #define PVR2_POLY_SPECULAR 0x00000004

 #define PVR2_POLY_SHADED   0x00000002

 #define PVR2_POLY_UV_16BIT 0x00000001

 #define PVR2_POLY_MODE_CLAMP_RGB 0x00200000

 #define PVR2_POLY_MODE_ALPHA    0x00100000

 #define PVR2_POLY_MODE_TEXALPHA 0x00080000

 #define PVR2_POLY_MODE_FLIP_S   0x00040000

 #define PVR2_POLY_MODE_FLIP_T   0x00020000

 #define PVR2_POLY_MODE_CLAMP_S  0x00010000

 #define PVR2_POLY_MODE_CLAMP_T  0x00008000

 #define PVR2_TEX_FORMAT_ARGB1555 0x00000000

 #define PVR2_TEX_FORMAT_RGB565   0x08000000

 #define PVR2_TEX_FORMAT_ARGB4444 0x10000000

 #define PVR2_TEX_FORMAT_YUV422   0x18000000

 #define PVR2_TEX_FORMAT_BUMPMAP  0x20000000

 #define PVR2_TEX_FORMAT_IDX4     0x28000000

 #define PVR2_TEX_FORMAT_IDX8     0x30000000

 #define PVR2_TEX_MIPMAP      0x80000000

 #define PVR2_TEX_COMPRESSED  0x40000000

 #define PVR2_TEX_FORMAT_MASK 0x38000000

 #define PVR2_TEX_UNTWIDDLED  0x04000000

 #define PVR2_TEX_STRIDE      0x02000000

 #define PVR2_TEX_ADDR(x) ( ((x)&0x01FFFFF)<<3 );

 #define PVR2_TEX_IS_MIPMAPPED(x) ( (x) & PVR2_TEX_MIPMAP )

 #define PVR2_TEX_IS_COMPRESSED(x) ( (x) & PVR2_TEX_COMPRESSED )

 #define PVR2_TEX_IS_TWIDDLED(x) (((x) & PVR2_TEX_UNTWIDDLED) == 0)

 #define PVR2_TEX_IS_STRIDE(x) (((x) & 0x06000000) == 0x06000000)

 /****************************** Frame Buffer *****************************/

 /**

  * Write a block of data to an address in the DMA range (0x10000000 - 

  * 0x13FFFFFF), ie TA, YUV, or texture ram.

  */

 void pvr2_dma_write( sh4addr_t dest, char *src, uint32_t length );

 /**

  * Write to the interleaved memory address space (aka 64-bit address space).

  */

 void pvr2_vram64_write( sh4addr_t dest, char *src, uint32_t length );

 /**

  * Write to the interleaved memory address space (aka 64-bit address space),

  * using a line length and stride.

  */

 void pvr2_vram64_write_stride( sh4addr_t dest, char *src, uint32_t line_bytes,

 			       uint32_t line_stride_bytes, uint32_t line_count );

 /**

  * Read from the interleaved memory address space (aka 64-bit address space)

  */

 void pvr2_vram64_read( char *dest, sh4addr_t src, uint32_t length );

 /**

  * Read a twiddled image from interleaved memory address space (aka 64-bit address

  * space), writing the image to the destination buffer in detwiddled format. 

  * Width and height must be powers of 2

  * This version reads 4-bit pixels.

  */

 void pvr2_vram64_read_twiddled_4( char *dest, sh4addr_t src, uint32_t width, uint32_t height );

 /**

  * Read a twiddled image from interleaved memory address space (aka 64-bit address

  * space), writing the image to the destination buffer in detwiddled format. 

  * Width and height must be powers of 2

  * This version reads 8-bit pixels.

  */

 void pvr2_vram64_read_twiddled_8( char *dest, sh4addr_t src, uint32_t width, uint32_t height );

 /**

  * Read a twiddled image from interleaved memory address space (aka 64-bit address

  * space), writing the image to the destination buffer in detwiddled format. 

  * Width and height must be powers of 2, and src must be 16-bit aligned.

  * This version reads 16-bit pixels.

  */

 void pvr2_vram64_read_twiddled_16( char *dest, sh4addr_t src, uint32_t width, uint32_t height );

 /**

  * Read an image from the interleaved memory address space (aka 64-bit address space) 

  * where the source and destination line sizes may differ. Note that both byte

  * counts must be a multiple of 4, and the src address must be 32-bit aligned.

  */

 void pvr2_vram64_read_stride( char *dest, uint32_t dest_line_bytes, sh4addr_t srcaddr,

 			       uint32_t src_line_bytes, uint32_t line_count );

 /**

  * Dump a portion of vram to a stream from the interleaved memory address 

  * space.

  */

 void pvr2_vram64_dump( sh4addr_t addr, uint32_t length, FILE *f );

 /**

  * Describes a rendering buffer that's actually held in GL, for when we need

  * to fetch the bits back to vram.

  */

 typedef struct pvr2_render_buffer {

     sh4addr_t render_addr; /* The actual address rendered to in pvr ram */

     uint32_t size; /* Length of rendering region in bytes */

     int width, height;

     int colour_format;

 } *pvr2_render_buffer_t;

 /**

  * Flush the indicated render buffer back to PVR. Caller is responsible for

  * tracking whether there is actually anything in the buffer.

  *

  * @param buffer A render buffer indicating the address to store to, and the

  * format the data needs to be in.

  * @param backBuffer TRUE to flush the back buffer, FALSE for 

  * the front buffer.

  */

 void pvr2_render_buffer_copy_to_sh4( pvr2_render_buffer_t buffer, 

 				     gboolean backBuffer );

 /**

  * Copy data from PVR ram into the GL render buffer. 

  *

  * @param buffer A render buffer indicating the address to read from, and the

  * format the data is in.

  * @param backBuffer TRUE to write the back buffer, FALSE for 

  * the front buffer.

  */

 void pvr2_render_buffer_copy_from_sh4( pvr2_render_buffer_t buffer, 

 				       gboolean backBuffer );

 /**

  * Invalidate any caching on the supplied SH4 address

  */

 gboolean pvr2_render_buffer_invalidate( sh4addr_t addr );

 /**************************** Tile Accelerator ***************************/

 /**

  * Process the data in the supplied buffer as an array of TA command lists.

  * Any excess bytes are held pending until a complete list is sent

  */

 void pvr2_ta_write( char *buf, uint32_t length );

 /**

  * (Re)initialize the tile accelerator in preparation for the next scene.

  * Normally called immediately before commencing polygon transmission.

  */

 void pvr2_ta_init( void );

 /****************************** YUV Converter ****************************/

 /**

  * Process a block of YUV data.

  */

 void pvr2_yuv_write( char *buf, uint32_t length );

 /**

  * Initialize the YUV converter.

  */

 void pvr2_yuv_init( uint32_t target_addr );

 void pvr2_yuv_set_config( uint32_t config );

 /********************************* Renderer ******************************/

 /**

  * Initialize the rendering pipeline.

  * @return TRUE on success, FALSE on failure.

  */

 gboolean pvr2_render_init( void );

 /**

  * Render the current scene stored in PVR ram to the GL back buffer.

  */

 void pvr2_render_scene( void );

 /**

  * Display the scene rendered to the supplied address.

  * @return TRUE if there was an available render that was displayed,

  * otherwise FALSE (and no action was taken)

  */

 gboolean pvr2_render_display_frame( uint32_t address );

 void render_backplane( uint32_t *polygon, uint32_t width, uint32_t height, uint32_t mode );

 void render_set_context( uint32_t *context, int render_mode );

 void pvr2_render_tilebuffer( int width, int height, int clipx1, int clipy1, 

 			     int clipx2, int clipy2 );

 float pvr2_render_find_maximum_z();

 /**

  * Structure to hold a complete unpacked vertex (excluding modifier

  * volume parameters - generate separate vertexes in that case).

  */

 struct vertex_unpacked {

     float x,y,z;

     float u,v;            /* Texture coordinates */

     float rgba[4];        /* Fragment colour (RGBA order) */

     float offset_rgba[4]; /* Offset color (RGBA order) */

 };

 void render_unpacked_vertex_array( uint32_t poly1, struct vertex_unpacked *vertexes[], 

 				   int num_vertexes );

 void render_vertex_array( uint32_t poly1, uint32_t *vertexes[], int num_vertexes, 

 			  int vertex_size, int render_mode );

 /****************************** Texture Cache ****************************/

 /**

  * Initialize the texture cache.

  */

 void texcache_init( void );

 /**

  * Initialize the GL side of the texture cache (texture ids and such).

  */

 void texcache_gl_init( void );

 /**

  * Flush all textures and delete. The cache will be non-functional until

  * the next call to texcache_init(). This would typically be done if

  * switching GL targets.

  */    

 void texcache_shutdown( void );

 /**

  * Evict all textures contained in the page identified by a texture address.

  */

 void texcache_invalidate_page( uint32_t texture_addr );

 /**

  * Return a texture ID for the texture specified at the supplied address

  * and given parameters (the same sequence of bytes could in theory have

  * multiple interpretations). We use the texture address as the primary

  * index, but allow for multiple instances at each address. The texture

  * will be bound to the GL_TEXTURE_2D target before being returned.

  * 

  * If the texture has already been bound, return the ID to which it was

  * bound. Otherwise obtain an unused texture ID and set it up appropriately.

  */

 GLuint texcache_get_texture( uint32_t texture_addr, int width, int height,

 			     int mode );

 /************************* Rendering support macros **************************/

 #define POLY1_DEPTH_MODE(poly1) ( pvr2_poly_depthmode[(poly1)>>29] )

 #define POLY1_DEPTH_ENABLE(poly1) (((poly1)&0x04000000) == 0 )

 #define POLY1_CULL_MODE(poly1) (((poly1)>>27)&0x03)

 #define POLY1_TEXTURED(poly1) (((poly1)&0x02000000))

 #define POLY1_SPECULAR(poly1) (((poly1)&0x01000000))

 #define POLY1_GOURAUD_SHADED(poly1) ((poly1)&0x00800000)

 #define POLY1_SHADE_MODEL(poly1) (((poly1)&0x00800000) ? GL_SMOOTH : GL_FLAT)

 #define POLY1_UV16(poly1)   (((poly1)&0x00400000))

 #define POLY1_SINGLE_TILE(poly1) (((poly1)&0x00200000))

 #define POLY2_SRC_BLEND(poly2) ( pvr2_poly_srcblend[(poly2) >> 29] )

 #define POLY2_DEST_BLEND(poly2) ( pvr2_poly_dstblend[((poly2)>>26)&0x07] )

 #define POLY2_SRC_BLEND_TARGET(poly2)    ((poly2)&0x02000000)

 #define POLY2_DEST_BLEND_TARGET(poly2)   ((poly2)&0x01000000)

 #define POLY2_COLOUR_CLAMP_ENABLE(poly2) ((poly2)&0x00200000)

 #define POLY2_ALPHA_ENABLE(poly2)        ((poly2)&0x00100000)

 #define POLY2_TEX_ALPHA_ENABLE(poly2)   (((poly2)&0x00080000) == 0 )

 #define POLY2_TEX_CLAMP_U(poly2)         ((poly2)&0x00010000)

 #define POLY2_TEX_CLAMP_V(poly2)         ((poly2)&0x00008000)

 #define POLY2_TEX_WIDTH(poly2) ( 1<< ((((poly2) >> 3) & 0x07 ) + 3) )

 #define POLY2_TEX_HEIGHT(poly2) ( 1<< (((poly2) & 0x07 ) + 3) )

 #define POLY2_TEX_BLEND(poly2) ( pvr2_poly_texblend[((poly2) >> 6)&0x03] )

 extern int pvr2_poly_depthmode[8];

 extern int pvr2_poly_srcblend[8];

 extern int pvr2_poly_dstblend[8];

 extern int pvr2_poly_texblend[4];

 extern int pvr2_render_colour_format[8];

 float halftofloat(uint16_t half);