Zack Buhman
9fc40136af
This also adds ta_parameter_writer; I am not certain if I like this, but it felt necessary to deal with ta_parameters being either 32 or 64 bytes long--for this reason, a reinterpret_cast to a union is less attractive (the union members are not a fixed size).
82 lines
1.9 KiB
C++
82 lines
1.9 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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struct vertex {
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float x;
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float y;
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float z;
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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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{ 200.f, 360.f, 0.1f },
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{ 200.f, 120.f, 0.1f },
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{ 440.f, 120.f, 0.1f },
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{ 440.f, 360.f, 0.1f },
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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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constexpr uint32_t base_color = 0xffff0000;
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parameter.append<global_sprite>() = global_sprite(base_color);
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parameter.append<vertex_sprite_type_0>() =
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vertex_sprite_type_0(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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// curiously, there is no quad_veritices[3].z in vertex_sprite_type_0
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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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uint32_t _ta_parameter_buf[((32 + 64 + 32) + 32) / 4];
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void main()
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{
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vga();
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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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core_init_texture_memory();
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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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while (true) {
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v_sync_out();
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v_sync_in();
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ta_polygon_converter_init();
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uint32_t ta_parameter_size = transform(ta_parameter_buf);
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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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constexpr int frame_ix = 0;
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constexpr int num_frames = 0;
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core_start_render(frame_ix, num_frames);
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}
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}
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