Zack Buhman
511d99563d
From the GCC manual.
> GCC permits a C structure to have no members:
struct empty {
};
> The structure has size zero. In C++, empty structures are part of the
> language. G++ treats empty structures as if they had a single member of type
> char.
I was not aware of the different behavior in C++.
This fixes every maple example--most were broken for multiple reasons, including
this one.
This also enables SH4 caching. This includes linking code/data into the P1
area (previously this was not the case).
The maple examples (which indeed involve much use of DMA) require much work to
successfully work with the operand and copyback caches. The vibration example
currently is the most complete, though I should consider more on how I want to
structure maple response operand cache invalidation more generally.
275 lines
8.6 KiB
C++
275 lines
8.6 KiB
C++
#include <cstdint>
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#include "align.hpp"
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#include "vga.hpp"
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#include "holly/texture_memory_alloc.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_fifo_polygon_converter.hpp"
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#include "holly/ta_parameter.hpp"
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#include "holly/ta_global_parameter.hpp"
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#include "holly/ta_vertex_parameter.hpp"
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#include "holly/ta_bits.hpp"
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#include "holly/region_array.hpp"
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#include "holly/background.hpp"
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#include "holly/isp_tsp.hpp"
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#include "memorymap.hpp"
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#include "geometry/plane.hpp"
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#include "geometry/cube.hpp"
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#include "math/vec3.hpp"
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#include "math/vec4.hpp"
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vec3 _transform(const vec3& point,
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const uint32_t scale,
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const float theta)
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{
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float x = point.x;
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float y = point.y;
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float z = point.z;
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float t;
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// object transform
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t = z * cos(theta) - x * sin(theta);
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x = z * sin(theta) + x * cos(theta);
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z = t;
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x *= scale;
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y *= scale;
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z *= scale;
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// world transform
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y += 2.0f;
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x *= 0.8;
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y *= 0.8;
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z *= 0.8;
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// camera transform
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z += 4;
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// perspective
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x = x / z;
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y = y / z;
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// screen space transform
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x *= 240.f;
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y *= 240.f;
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x += 320.f;
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y += 240.f;
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z = 1 / z;
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return {x, y, z};
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}
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void transform_polygon(ta_parameter_writer& parameter,
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const vec3 * vertices,
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const face& face,
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const float scale,
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const vec4& color,
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const float theta)
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{
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const uint32_t 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::floating_color
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| obj_control::shadow;
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const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::depth_compare_mode::greater
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| isp_tsp_instruction_word::culling_mode::no_culling;
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const uint32_t 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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parameter.append<ta_global_parameter::polygon_type_0>() =
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ta_global_parameter::polygon_type_0(parameter_control_word,
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isp_tsp_instruction_word,
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tsp_instruction_word,
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0, // texture_control_word
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0, // data_size_for_sort_dma
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0 // next_address_for_sort_dma
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);
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constexpr uint32_t strip_length = 3;
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for (uint32_t i = 0; i < strip_length; i++) {
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// world transform
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uint32_t vertex_ix = face[i].vertex;
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auto& vertex = vertices[vertex_ix];
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auto point = _transform(vertex, scale, theta);
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bool end_of_strip = i == strip_length - 1;
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parameter.append<ta_vertex_parameter::polygon_type_1>() =
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ta_vertex_parameter::polygon_type_1(polygon_vertex_parameter_control_word(end_of_strip),
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point.x,
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point.y,
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point.z,
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color.a, // alpha
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color.r, // red
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color.g, // green
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color.b // blue
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);
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}
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}
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void transform_modifier_volume(ta_parameter_writer& parameter,
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const vec3 * vertices,
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const face * faces,
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const uint32_t num_faces,
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const float scale)
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{
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const uint32_t parameter_control_word = para_control::para_type::polygon_or_modifier_volume
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| para_control::list_type::opaque_modifier_volume
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// | group_control::group_en
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// | group_control::user_clip::inside_enable
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;
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const uint32_t isp_tsp_instruction_word = isp_tsp_instruction_word::volume_instruction::normal_polygon
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| isp_tsp_instruction_word::culling_mode::no_culling;
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parameter.append<ta_global_parameter::modifier_volume>() =
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ta_global_parameter::modifier_volume(parameter_control_word,
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isp_tsp_instruction_word
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);
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for (uint32_t i = 0; i < num_faces; i++) {
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// world transform
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uint32_t ix_a = faces[i][0].vertex;
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uint32_t ix_b = faces[i][1].vertex;
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uint32_t ix_c = faces[i][2].vertex;
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auto& _a = vertices[ix_a];
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auto& _b = vertices[ix_b];
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auto& _c = vertices[ix_c];
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auto a = _transform(_a, scale, 0.f);
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auto b = _transform(_b, scale, 0.f);
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auto c = _transform(_c, scale, 0.f);
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if (i == (num_faces - 1)) {
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const uint32_t last_parameter_control_word = para_control::para_type::polygon_or_modifier_volume
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| para_control::list_type::opaque_modifier_volume
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| obj_control::volume::modifier_volume::last_in_volume;
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const uint32_t last_isp_tsp_instruction_word = isp_tsp_instruction_word::volume_instruction::inside_last_polygon
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| isp_tsp_instruction_word::culling_mode::no_culling;
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parameter.append<ta_global_parameter::modifier_volume>() =
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ta_global_parameter::modifier_volume(last_parameter_control_word,
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last_isp_tsp_instruction_word);
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}
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parameter.append<ta_vertex_parameter::modifier_volume>() =
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ta_vertex_parameter::modifier_volume(modifier_volume_vertex_parameter_control_word(),
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a.x, a.y, a.z,
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b.x, b.y, b.z,
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c.x, c.y, c.z);
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}
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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, 0xff220000);
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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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uint32_t _ta_parameter_buf[((32 * 8192) + 32) / 4];
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void main()
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{
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vga();
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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::_16x4byte
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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 = 16 * 4
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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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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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float theta = 0;
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while (true) {
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ta_polygon_converter_init(opb_size.total(),
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ta_alloc,
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640 / 32,
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480 / 32);
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auto parameter = ta_parameter_writer(ta_parameter_buf);
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{ // plane
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vec4 color = {1.0, 0.9, 0.4, 0.2};
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float scale = 2.f;
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for (uint32_t i = 0; i < plane::num_faces; i++) {
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transform_polygon(parameter,
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plane::vertices,
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plane::faces[i],
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scale,
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color,
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theta);
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}
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/*
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for (uint32_t i = 0; i < cube::num_faces; i++) {
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transform_polygon(parameter,
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cube::vertices,
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cube::faces[i],
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1.f,
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{1.0f, 0.0f, 1.0f, 0.0f});
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}
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*/
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}
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// end of opaque list
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parameter.append<ta_global_parameter::end_of_list>() = ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
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{ // cube
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float scale = 1.f;
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transform_modifier_volume(parameter,
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cube::vertices,
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cube::faces,
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cube::num_faces,
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scale);
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}
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// end of opaque modifier list
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parameter.append<ta_global_parameter::end_of_list>() = ta_global_parameter::end_of_list(para_control::para_type::end_of_list);
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ta_polygon_converter_transfer(ta_parameter_buf, parameter.offset);
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ta_wait_opaque_modifier_volume_list();
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core_start_render(frame_ix, num_frames);
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core_wait_end_of_render_video();
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while (!spg_status::vsync(holly.SPG_STATUS));
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core_flip(frame_ix, num_frames);
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while (spg_status::vsync(holly.SPG_STATUS));
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constexpr float half_degree = 0.01745329f / 2;
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theta += half_degree;
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frame_ix += 1;
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}
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}
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