Zack Buhman
b484b5d4fe
After implementing this, I realized I don't like the appearance of the monochrome font as much as the antialiased font.
269 lines
7.8 KiB
C++
269 lines
7.8 KiB
C++
#include <cstdint>
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#include "align.hpp"
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#include "vga.hpp"
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#include "holly.hpp"
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#include "holly/core.hpp"
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#include "holly/core_bits.hpp"
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#include "holly/ta_parameter.hpp"
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#include "holly/ta_fifo_polygon_converter.hpp"
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#include "holly/texture_memory_alloc.hpp"
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#include "memorymap.hpp"
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#include "holly/background.hpp"
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#include "holly/region_array.hpp"
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#include "holly/ta_bits.hpp"
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#include "twiddle.hpp"
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#include "serial.hpp"
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#include "sperrypc.hpp"
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struct vertex {
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float x;
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float y;
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float z;
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float u;
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float v;
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};
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/*
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// screen space coordinates
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const struct vertex quad_verticies[4] = {
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{ 0.f, 64.f, 0.01f, 0.f, 1.f },
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{ 0.f, 0.f, 0.01f, 0.f, 0.f },
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{ 64.f, 0.f, 0.01f, 1.f, 0.f },
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{ 64.f, 64.f, 0.01f, 1.f, 1.f, },
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};
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uint32_t transform(uint32_t * ta_parameter_buf)
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{
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auto parameter = ta_parameter_writer(ta_parameter_buf);
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uint32_t texture_address = (offsetof (struct texture_memory_alloc, texture));
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constexpr uint32_t base_color = 0xffffffff;
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auto sprite = global_sprite(base_color);
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sprite.parameter_control_word = para_control::para_type::sprite
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| para_control::list_type::opaque
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| obj_control::col_type::packed_color
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| obj_control::texture
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| obj_control::_16bit_uv;
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sprite.tsp_instruction_word = tsp_instruction_word::src_alpha_instr::one
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| tsp_instruction_word::dst_alpha_instr::zero
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| tsp_instruction_word::fog_control::no_fog
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| tsp_instruction_word::texture_u_size::_8 // 8px
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| tsp_instruction_word::texture_v_size::_8; // 8px
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sprite.texture_control_word = texture_control_word::pixel_format::_565
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| texture_control_word::scan_order::twiddled
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| texture_control_word::texture_address(texture_address / 8);
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parameter.append<global_sprite>() = sprite;
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parameter.append<vertex_sprite_type_1>() =
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vertex_sprite_type_1(quad_verticies[0].x,
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quad_verticies[0].y,
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quad_verticies[0].z,
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quad_verticies[1].x,
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quad_verticies[1].y,
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quad_verticies[1].z,
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quad_verticies[2].x,
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quad_verticies[2].y,
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quad_verticies[2].z,
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quad_verticies[3].x,
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quad_verticies[3].y,
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uv_16bit(quad_verticies[0].u, quad_verticies[0].v),
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uv_16bit(quad_verticies[1].u, quad_verticies[1].v),
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uv_16bit(quad_verticies[2].u, quad_verticies[2].v));
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// curiously, there is no `dz` in vertex_sprite_type_1
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// curiously, there is no `du_dv` in vertex_sprite_type_1
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parameter.append<global_end_of_list>() = global_end_of_list();
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return parameter.offset;
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}
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*/
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const struct vertex strip_vertices[4] = {
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// [ position ] [ uv coordinates ]
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{ -0.5f, 0.5f, 0.f, 0.f, 1.f, },
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{ -0.5f, -0.5f, 0.f, 0.f, 0.f, },
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{ 0.5f, 0.5f, 0.f, 1.f, 1.f, },
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{ 0.5f, -0.5f, 0.f, 1.f, 0.f, },
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};
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constexpr uint32_t strip_length = (sizeof (strip_vertices)) / (sizeof (struct vertex));
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uint32_t transform(uint32_t * ta_parameter_buf, const char * s, const uint32_t len)
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{
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auto parameter = ta_parameter_writer(ta_parameter_buf);
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uint32_t texture_address = (offsetof (struct texture_memory_alloc, texture));
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for (uint32_t string_ix = 0; string_ix < len; string_ix++) {
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auto polygon = global_polygon_type_0(texture_address);
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polygon.parameter_control_word = para_control::para_type::polygon_or_modifier_volume
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| para_control::list_type::opaque
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| obj_control::col_type::packed_color
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| obj_control::texture;
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polygon.tsp_instruction_word = tsp_instruction_word::src_alpha_instr::one
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| tsp_instruction_word::dst_alpha_instr::zero
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| tsp_instruction_word::fog_control::no_fog
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| tsp_instruction_word::texture_u_size::_8 // 8px
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| tsp_instruction_word::texture_v_size::_8; // 8px
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polygon.texture_control_word = texture_control_word::pixel_format::_4bpp_palette
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| texture_control_word::scan_order::twiddled
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| texture_control_word::texture_address((texture_address + 8 * 8 * (s[string_ix] - ' ')) / 8);
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parameter.append<global_polygon_type_0>() = polygon;
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for (uint32_t i = 0; i < strip_length; i++) {
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bool end_of_strip = i == strip_length - 1;
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float x = strip_vertices[i].x;
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float y = strip_vertices[i].y;
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float z = strip_vertices[i].z;
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x *= 32.f;
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y *= 32.f;
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x += 64.f + 32 * string_ix;
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y += 240.f;
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z = 1.f / (z + 10.f);
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parameter.append<vertex_polygon_type_3>() =
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vertex_polygon_type_3(x, y, z,
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strip_vertices[i].u,
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strip_vertices[i].v,
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0x00000000, // base_color
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end_of_strip);
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}
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}
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parameter.append<global_end_of_list>() = global_end_of_list();
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return parameter.offset;
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}
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void init_texture_memory(const struct opb_size& opb_size)
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{
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auto mem = reinterpret_cast<volatile texture_memory_alloc *>(texture_memory32);
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background_parameter(mem->background, 0xff0000ff);
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region_array2(mem->region_array,
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(offsetof (struct texture_memory_alloc, object_list)),
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640 / 32, // width
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480 / 32, // height
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opb_size
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);
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}
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inline void inflate_character(const uint8_t * src, const uint8_t c)
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{
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uint8_t character_index = c - ' ';
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uint8_t temp[8 * 8];
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for (uint32_t y = 0; y < 8; y++) {
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uint8_t row = src[y + 8 * character_index];
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for (uint32_t x = 0; x < 8; x++) {
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uint8_t px = (row >> (7 - x)) & 1;
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//serial::character((px == 1) ? 'X' : '_');
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//uint16_t rgb565 = px ? 0xffff : 0;
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uint16_t palette_index = px ? 2 : 1;
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temp[y * 8 + x] = palette_index;
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}
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//serial::character('\n');
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}
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auto mem = reinterpret_cast<volatile texture_memory_alloc *>(texture_memory64);
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auto texture = reinterpret_cast<volatile uint32_t *>(mem->texture);
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uint32_t offset = 8 * 8 * character_index;
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/*
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union {
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uint8_t u8[8 * 8];
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uint32_t u32[8 * 8 / 4];
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} temp2;
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twiddle::texure_4bpp(temp2.u8, temp, 8, 8);
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for (uint32_t i = 0; i < 8 * 8 / 4; i++) {
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texture[(offset / 4) + i] = temp2.u32[i];
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}
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*/
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twiddle::texture2<4>(&texture[offset / 4], temp,
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8,
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8 * 8);
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}
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void inflate_font(const uint8_t * src)
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{
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for (uint8_t ix = 0x20; ix < 0x7f; ix++) {
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inflate_character(src, ix);
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}
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}
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void palette_data()
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{
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holly.PAL_RAM_CTRL = pal_ram_ctrl::pixel_format::rgb565;
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holly.PALETTE_RAM[1] = (15) << 11;
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holly.PALETTE_RAM[2] = (15 << 11) | (30 << 5);
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}
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uint32_t _ta_parameter_buf[((32 * 10 * 17) + 32) / 4];
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void main()
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{
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vga();
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auto src = reinterpret_cast<const uint8_t *>(&_binary_sperrypc_data_start);
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inflate_font(src);
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palette_data();
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// The address of `ta_parameter_buf` must be a multiple of 32 bytes.
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// This is mandatory for ch2-dma to the ta fifo polygon converter.
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uint32_t * ta_parameter_buf = align_32byte(_ta_parameter_buf);
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constexpr uint32_t ta_alloc = ta_alloc_ctrl::pt_opb::no_list
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| ta_alloc_ctrl::tm_opb::no_list
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| ta_alloc_ctrl::t_opb::no_list
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| ta_alloc_ctrl::om_opb::no_list
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| ta_alloc_ctrl::o_opb::_16x4byte;
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constexpr struct opb_size opb_size = { .opaque = 16 * 4
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, .opaque_modifier = 0
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, .translucent = 0
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, .translucent_modifier = 0
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, .punch_through = 0
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};
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constexpr uint32_t tiles = (640 / 32) * (320 / 32);
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holly.SOFTRESET = softreset::pipeline_soft_reset
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| softreset::ta_soft_reset;
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holly.SOFTRESET = 0;
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core_init();
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init_texture_memory(opb_size);
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uint32_t frame_ix = 0;
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constexpr uint32_t num_frames = 1;
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const char ana[18] = "A from ana i know";
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while (true) {
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ta_polygon_converter_init(opb_size.total() * tiles, ta_alloc,
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640, 480);
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uint32_t ta_parameter_size = transform(ta_parameter_buf, ana, 17);
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ta_polygon_converter_transfer(ta_parameter_buf, ta_parameter_size);
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ta_wait_opaque_list();
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core_start_render(frame_ix, num_frames);
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v_sync_out();
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v_sync_in();
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core_wait_end_of_render_video(frame_ix, num_frames);
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frame_ix++;
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}
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}
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