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.
402 lines
12 KiB
C++
402 lines
12 KiB
C++
#include <cstdint>
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#include "align.hpp"
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#include "vga.hpp"
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#include "holly/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/isp_tsp.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/texture_memory_alloc.hpp"
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#include "memorymap.hpp"
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#include "sh7091/sh7091.hpp"
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#include "sh7091/sh7091_bits.hpp"
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#include "sh7091/serial.hpp"
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#include "geometry/suzanne.hpp"
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#include "geometry/circle.hpp"
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#include "math/vec4.hpp"
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#include "font/font_bitmap.hpp"
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#include "verite_8x16.hpp"
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#include "string.hpp"
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constexpr float half_degree = 0.01745329f / 2;
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#define MODEL suzanne
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vec3 rotate(const vec3& vertex,
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const float theta)
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{
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float x = vertex.x;
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float y = vertex.y;
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float z = vertex.z;
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float t;
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t = y * cos(theta) - z * sin(theta);
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z = y * sin(theta) + z * cos(theta);
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y = t;
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float theta2 = 3.14 * sin(theta / 2);
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t = x * cos(theta2) - z * sin(theta2);
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z = x * sin(theta2) + z * cos(theta2);
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x = t;
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return vec3(x, y, z);
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}
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void transform(ta_parameter_writer& parameter,
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const uint32_t face_ix,
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const float theta,
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const vec3 lights[3])
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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::gouraud;
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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::cull_if_positive;
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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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auto& face = MODEL::faces[face_ix];
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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 = MODEL::vertices[vertex_ix];
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auto point = rotate(vertex, theta);
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// lighting transform
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uint32_t normal_ix = face[i].normal;
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auto& normal = MODEL::normals[normal_ix];
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auto n = rotate(normal, theta);
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vec4 color = {0.2, 0.2, 0.2, 1.0};
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// intensity calculation
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{
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auto l = lights[0] - point;
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auto n_dot_l = dot(n, l);
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if (n_dot_l > 0) {
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color.x += 0.6 * n_dot_l / (length(n) * length(l));
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}
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}
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{
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auto l = lights[1] - point;
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auto n_dot_l = dot(n, l);
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if (n_dot_l > 0) {
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color.y += 0.6 * n_dot_l / (length(n) * length(l));
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}
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}
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{
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auto l = lights[2] - point;
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auto n_dot_l = dot(n, l);
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if (n_dot_l > 0) {
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color.z += 0.6 * n_dot_l / (length(n) * length(l));
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}
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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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x *= 10;
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y *= 10;
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z *= 10;
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// camera transform
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z += 20;
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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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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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x, y, z,
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color.w, // alpha
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color.x, // r
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color.y, // g
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color.z // b
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);
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}
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}
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void transform2(ta_parameter_writer& parameter,
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const vec3& pos,
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const vec4& color)
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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::gouraud;
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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 vec3 triangle[] = {
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{ 0.f, -1.f, 0.f},
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{-1.f, 1.f, 0.f},
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{ 1.f, 1.f, 0.f},
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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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float x = triangle[i].x;
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float y = triangle[i].y;
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float z = triangle[i].z;
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x *= 0.2;
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y *= 0.2;
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z *= 0.2;
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x += pos.x;
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y += pos.y;
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z += pos.z;
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// camera transform
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z += 20;
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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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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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x, y, z,
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color.w, // alpha
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color.x, // r
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color.y, // g
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color.z // b
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);
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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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static inline void label_number(ta_parameter_writer& parameter,
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const char * label,
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const uint32_t len,
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const uint32_t number,
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const uint32_t row)
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{
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constexpr uint32_t max_label_len = 10;
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char buf[8];
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string::hex(buf, 8, number);
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font_bitmap::transform_string(parameter,
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8, 16, // texture
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8, 16, // glyph
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16 + (8 * (max_label_len - len)), // position x
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16 * row, // position y
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label, len);
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font_bitmap::transform_string(parameter,
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8, 16, // texture
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8, 16, // glyph
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16 + (8 * (max_label_len + 1)), // position x
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16 * row, // position y
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buf, 8);
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}
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void main()
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{
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sh7091.TMU.TSTR = 0; // stop all timers
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sh7091.TMU.TOCR = tmu::tocr::tcoe::tclk_is_external_clock_or_input_capture;
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sh7091.TMU.TCR0 = tmu::tcr0::tpsc::p_phi_256; // 256 / 200MHz = 1.28 μs ; underflows in ~1 hour
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sh7091.TMU.TCOR0 = 0xffff'ffff;
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sh7091.TMU.TCNT0 = 0xffff'ffff;
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sh7091.TMU.TSTR = tmu::tstr::str0::counter_start;
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vga();
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auto src = reinterpret_cast<const uint8_t *>(&_binary_verite_8x16_data_start);
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font_bitmap::inflate(1, // pitch
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8, // width
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16, // height
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8, // texture_width
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16, // texture_height
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src);
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font_bitmap::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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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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vec3 lights[3] = {
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{0.f, 0.f, 0.f},
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{0.f, 0.f, 0.f},
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{0.f, 0.f, 0.f},
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};
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uint32_t t_transform_start = 0;
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uint32_t t_transform_end = 0;
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uint32_t t_text_start = 0;
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uint32_t t_text_end = 0;
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uint32_t t_transfer_start = 0;
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uint32_t t_transfer_end = 0;
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uint32_t t_render_start = 0;
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uint32_t t_render_end = 0;
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while (1) {
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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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// transform start
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t_transform_start = sh7091.TMU.TCNT0;
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{
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const float theta2 = 3.14 * 2 * sin(theta / 7);
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lights[0].x = cos(theta) * 15;
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lights[0].z = sin(theta) * 15;
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lights[1].x = cos(theta2 + half_degree * 180.f) * 15;
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lights[1].z = sin(theta2 + half_degree * 180.f) * 15;
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lights[2].x = cos(theta + half_degree * 360.f) * 15;
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lights[2].z = sin(theta + half_degree * 360.f) * 15;
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for (uint32_t i = 0; i < MODEL::num_faces; i++) {
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transform(parameter, i, theta, lights);
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}
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transform2(parameter, lights[0], {1.f, 0.f, 0.f, 1.f});
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transform2(parameter, lights[1], {0.f, 1.f, 0.f, 1.f});
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transform2(parameter, lights[2], {0.f, 0.f, 1.f, 1.f});
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}
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t_transform_end = sh7091.TMU.TCNT0;
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// transform end
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uint32_t _t_text_start = sh7091.TMU.TCNT0;
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{
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const uint32_t transform = t_transform_start - t_transform_end;
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label_number(parameter, "transform:", 10, transform, 1);
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const uint32_t text = t_text_start - t_text_end;
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label_number(parameter, "text:", 5, text, 2);
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const uint32_t transfer = t_transfer_start - t_transfer_end;
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label_number(parameter, "transfer:", 9, transfer, 3);
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const uint32_t render = t_render_start - t_render_end;
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label_number(parameter, "render:", 7, render, 4);
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}
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t_text_start = _t_text_start;
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t_text_end = sh7091.TMU.TCNT0;
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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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// transfer start
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t_transfer_start = sh7091.TMU.TCNT0;
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{
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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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}
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t_transfer_end = sh7091.TMU.TCNT0;
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t_render_start = sh7091.TMU.TCNT0;
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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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t_render_end = sh7091.TMU.TCNT0;
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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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theta += half_degree * 0.5;
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frame_ix += 1;
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}
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}
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