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/*
* Copyright (C) 2011 Gilead Kutnick "Exophase" <exophase@gmail.com>
*
* 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.
*/
#ifndef PSX_GPU_H
#define PSX_GPU_H
typedef enum
{
PRIMITIVE_TYPE_TRIANGLE = 0,
PRIMITIVE_TYPE_SPRITE = 1,
PRIMITIVE_TYPE_LINE = 2,
PRIMITIVE_TYPE_UNKNOWN = 3
} primitive_type_enum;
typedef enum
{
TEXTURE_MODE_4BPP = 0,
TEXTURE_MODE_8BPP = 1,
TEXTURE_MODE_16BPP = 2
} texture_mode_enum;
typedef enum
{
BLEND_MODE_AVERAGE = 0,
BLEND_MODE_ADD = 1,
BLEND_MODE_SUBTRACT = 2,
BLEND_MODE_ADD_FOURTH = 3
} blend_mode_enum;
typedef enum
{
RENDER_FLAGS_MODULATE_TEXELS = 0x1,
RENDER_FLAGS_BLEND = 0x2,
RENDER_FLAGS_TEXTURE_MAP = 0x4,
RENDER_FLAGS_QUAD = 0x8,
RENDER_FLAGS_SHADE = 0x10,
} render_flags_enum;
typedef enum
{
RENDER_STATE_DITHER = 0x8,
RENDER_STATE_MASK_EVALUATE = 0x20,
} render_state_enum;
typedef enum
{
RENDER_INTERLACE_ENABLED = 0x1,
RENDER_INTERLACE_ODD = 0x2
} render_interlace_enum;
typedef struct
{
u16 left_x;
u16 num_blocks;
u16 right_mask;
u16 y;
} edge_data_struct;
// 64 bytes total
typedef struct
{
// 16 bytes
union
{
vec_8x16u uv;
vec_8x16u texels;
vec_8x16u draw_mask;
};
// 24 bytes
union
{
struct
{
vec_8x8u r;
vec_8x8u g;
vec_8x8u b;
};
vec_8x16u pixels;
};
// 8 bytes
u32 draw_mask_bits;
u16 *fb_ptr;
// 16 bytes
vec_8x16u dither_offsets;
} block_struct;
#define MAX_SPANS 512
#define MAX_BLOCKS 64
#define MAX_BLOCKS_PER_ROW 128
#define SPAN_DATA_BLOCKS_SIZE 32
typedef struct render_block_handler_struct render_block_handler_struct;
typedef struct
{
// 144 bytes
vec_8x16u test_mask;
vec_4x32u uvrg;
vec_4x32u uvrg_dx;
vec_4x32u uvrg_dy;
vec_4x32u u_block_span;
vec_4x32u v_block_span;
vec_4x32u r_block_span;
vec_4x32u g_block_span;
vec_4x32u b_block_span;
// 72 bytes
u32 b;
u32 b_dy;
u32 triangle_area;
u32 texture_window_settings;
u32 current_texture_mask;
u32 viewport_mask;
u32 dirty_textures_4bpp_mask;
u32 dirty_textures_8bpp_mask;
u32 dirty_textures_8bpp_alternate_mask;
u32 triangle_color;
u32 dither_table[4];
struct render_block_handler_struct *render_block_handler;
void *texture_page_ptr;
void *texture_page_base;
u16 *clut_ptr;
u16 *vram_ptr;
// 26 bytes
u16 render_state_base;
u16 render_state;
u16 num_spans;
u16 num_blocks;
s16 offset_x;
s16 offset_y;
u16 clut_settings;
u16 texture_settings;
s16 viewport_start_x;
s16 viewport_start_y;
s16 viewport_end_x;
s16 viewport_end_y;
u16 mask_msb;
// 8 bytes
u8 triangle_winding;
u8 display_area_draw_enable;
u8 current_texture_page;
u8 last_8bpp_texture_page;
u8 texture_mask_width;
u8 texture_mask_height;
u8 texture_window_x;
u8 texture_window_y;
u8 primitive_type;
u8 interlace_mode;
// Align up to 64 byte boundary to keep the upcoming buffers cache line
// aligned
//u8 reserved_a[0];
// 8KB
block_struct blocks[MAX_BLOCKS_PER_ROW];
// 14336 bytes
vec_4x32u span_uvrg_offset[MAX_SPANS];
edge_data_struct span_edge_data[MAX_SPANS];
u32 span_b_offset[MAX_SPANS];
u8 texture_4bpp_cache[32][256 * 256];
u8 texture_8bpp_even_cache[16][256 * 256];
u8 texture_8bpp_odd_cache[16][256 * 256];
} psx_gpu_struct;
typedef struct __attribute__((aligned(16)))
{
u8 u;
u8 v;
u8 r;
u8 g;
u8 b;
u8 reserved[3];
s16 x;
s16 y;
} vertex_struct;
void render_block_fill(psx_gpu_struct *psx_gpu, u32 color, u32 x, u32 y,
u32 width, u32 height);
void render_block_copy(psx_gpu_struct *psx_gpu, u16 *source, u32 x, u32 y,
u32 width, u32 height, u32 pitch);
void render_block_move(psx_gpu_struct *psx_gpu, u32 source_x, u32 source_y,
u32 dest_x, u32 dest_y, u32 width, u32 height);
void render_triangle(psx_gpu_struct *psx_gpu, vertex_struct *vertexes,
u32 flags);
void render_sprite(psx_gpu_struct *psx_gpu, s32 x, s32 y, u32 u, u32 v,
s32 width, s32 height, u32 flags, u32 color);
void render_line(psx_gpu_struct *gpu, vertex_struct *vertexes, u32 flags,
u32 color);
u32 texture_region_mask(s32 x1, s32 y1, s32 x2, s32 y2);
void flush_render_block_buffer(psx_gpu_struct *psx_gpu);
void initialize_psx_gpu(psx_gpu_struct *psx_gpu, u16 *vram);
u32 gpu_parse(psx_gpu_struct *psx_gpu, u32 *list, u32 size, u32 *last_command);
void triangle_benchmark(psx_gpu_struct *psx_gpu);
#endif
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