add NEON GPU rasterizer

1 files changed, 241 insertions, 0 deletions

diff --git a/plugins/gpu_neon/psx_gpu/psx_gpu.h b/plugins/gpu_neon/psx_gpu/psx_gpu.h
new file mode 100644
index 0000000..15d9469
--- /dev/null
+++ b/plugins/gpu_neon/psx_gpu/psx_gpu.h
@@ -0,0 +1,241 @@
+/*
+ * 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 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 primitive_color;
+
+  u32 dither_table[4];
+
+  struct render_block_handler_struct *render_block_handler;
+  void *texture_page_ptr;
+  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;
+
+  // Align up to 64 byte boundary to keep the upcoming buffers cache line
+  // aligned
+  u8 reserved_a[1];
+
+  // 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];
+
+  u16 _vram[1024 * 512];
+  u8 texture_4bpp_cache[32][256 * 256];
+  u8 texture_8bpp_even_cache[16][256 * 256];
+  u8 texture_8bpp_odd_cache[16][256 * 256];
+
+  u32 pixel_count_mode;
+  u32 pixel_compare_mode;
+
+  u8 *vram_pixel_counts_a;
+  u8 *vram_pixel_counts_b;
+  u16 *compare_vram;
+} 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);
+void gpu_parse(psx_gpu_struct *psx_gpu, u32 *list, u32 size);
+
+void triangle_benchmark(psx_gpu_struct *psx_gpu);
+
+#endif
+