Zack Buhman
b484b5d4fe
After implementing this, I realized I don't like the appearance of the monochrome font as much as the antialiased font.
250 lines
7.2 KiB
C++
250 lines
7.2 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 "font/font.hpp"
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#include "dejavusansmono.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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const struct vertex strip_vertices[4] = {
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// [ position ] [ uv coordinates ]
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{ 0.f, 1.f, 0.f, 0.f, 1.f, },
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{ 0.f, 0.f, 0.f, 0.f, 0.f, },
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{ 1.f, 1.f, 0.f, 1.f, 1.f, },
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{ 1.f, 0.f, 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(ta_parameter_writer& parameter,
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const uint32_t first_char_code,
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const uint32_t texture_width, uint32_t texture_height,
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const glyph * glyphs,
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const char * s, const uint32_t len,
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const uint32_t y_offset)
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{
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uint32_t texture_address = (offsetof (struct texture_memory_alloc, texture));
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uint32_t advance = 0; // in 26.6 fixed-point
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for (uint32_t string_ix = 0; string_ix < len; string_ix++) {
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char c = s[string_ix];
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auto& glyph = glyphs[c - first_char_code];
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if (glyph.bitmap.width == 0 || glyph.bitmap.height == 0) {
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advance += glyph.metrics.horiAdvance;
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continue;
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}
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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::from_int(texture_width)
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| tsp_instruction_word::texture_v_size::from_int(texture_height);
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polygon.texture_control_word = texture_control_word::pixel_format::_8bpp_palette
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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_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 *= glyph.bitmap.width;
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y *= glyph.bitmap.height;
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x += 100.f + ((advance + glyph.metrics.horiBearingX) >> 6);
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y += 200.f - ((glyph.metrics.horiBearingY) >> 6);
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y += y_offset >> 6;
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z = 1.f / (z + 10.f);
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float u = strip_vertices[i].u;
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float v = strip_vertices[i].v;
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u *= glyph.bitmap.width;
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v *= glyph.bitmap.height;
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u += glyph.bitmap.x;
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v += glyph.bitmap.y;
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u = u / static_cast<float>(texture_width);
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v = v / static_cast<float>(texture_height);
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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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u, v,
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0x00000000, // base_color
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end_of_strip);
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}
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advance += glyph.metrics.horiAdvance;
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}
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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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void inflate_font(const uint32_t * src,
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const uint32_t stride,
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const uint32_t curve_end_ix)
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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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twiddle::texture3<8, 8>(texture, reinterpret_cast<const uint8_t *>(src),
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stride,
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curve_end_ix);
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}
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template <int C>
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void palette_data()
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{
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static_assert(C >= 2);
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constexpr int increment = 256 / C;
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holly.PAL_RAM_CTRL = pal_ram_ctrl::pixel_format::rgb565;
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// generate a palette with `C` shades of grey,
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// ranging in intensity from rgb565(0, 0, 0) to rgb565(31, 63, 31)
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for (int i = 0; i < 256; i += increment) {
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holly.PALETTE_RAM[i / increment] = ((i >> 3) << 11)
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| ((i >> 2) << 5)
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| ((i >> 3) << 0);
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}
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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 font = reinterpret_cast<const struct font *>(&_binary_dejavusansmono_data_start);
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auto glyphs = reinterpret_cast<const struct glyph *>(&font[1]);
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auto texture = reinterpret_cast<const uint32_t *>(&glyphs[font->glyph_count]);
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/*
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serial::integer<uint32_t>(font->first_char_code);
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serial::integer<uint32_t>(font->glyph_count);
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serial::integer<uint32_t>(font->glyph_height);
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serial::integer<uint32_t>(font->texture_stride);
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serial::integer<uint32_t>(font->texture_width);
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serial::integer<uint32_t>(font->texture_height);
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serial::character('\n');
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serial::integer<uint32_t>(((uint32_t)glyphs) - ((uint32_t)font));
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serial::integer<uint32_t>(((uint32_t)texture) - ((uint32_t)font));
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*/
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inflate_font(texture,
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font->texture_stride,
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font->max_z_curve_ix);
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palette_data<256>();
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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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const char cabal[27] = "where is this secret cabal";
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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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auto parameter = ta_parameter_writer(ta_parameter_buf);
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transform(parameter,
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font->first_char_code,
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font->texture_width, font->texture_height,
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glyphs,
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ana, 17,
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font->glyph_height * 0);
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transform(parameter,
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font->first_char_code,
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font->texture_width, font->texture_height,
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glyphs,
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cabal, 26,
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font->glyph_height * 1);
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parameter.append<global_end_of_list>() = global_end_of_list();
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ta_polygon_converter_transfer(ta_parameter_buf, parameter.offset);
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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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