Zack Buhman
bcaa9789cf
The previous texture_memory_alloc.hpp was written based on an incorrect understanding of the "32-bit" and "64-bit" texture memory address mapping. The primary motivation is to rearrange the texture memory address map so that "textures" (64-bit access) do not overlap with 32-bit accesses, such as REGION_BASE or PARAM_BASE.
219 lines
6.5 KiB
C++
219 lines
6.5 KiB
C++
#include <cstdint>
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#include "align.hpp"
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#include "holly/video_output.hpp"
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#include "holly/texture_memory_alloc.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/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/geometry.hpp"
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#include "geometry/suzanne2.hpp"
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#include "geometry/plane2.hpp"
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#include "viewing_system/view_space.hpp"
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#include "viewing_system/screen_space.hpp"
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uint32_t _ta_parameter_buf[((32 * 8192) + 32) / 4];
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struct viewer {
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vec3 position;
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vec3 orientation;
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float azimuth;
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float colatitude;
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};
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void ta_upload(ta_parameter_writer& parameter,
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const position__color * vertices,
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const face_vtn * faces,
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const uint32_t num_faces,
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const mat4x4 world_transform,
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const mat4x4 screen_transform
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)
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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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for (uint32_t face_ix = 0; face_ix < num_faces; face_ix++) {
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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 = faces[face_ix];
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constexpr uint32_t strip_length = 3;
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mat4x4 transform = screen_transform * world_transform;
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for (uint32_t i = 0; i < strip_length; i++) {
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const uint32_t vertex_ix = face[i].vertex;
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auto& position = vertices[vertex_ix].position;
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auto& color = vertices[vertex_ix].color;
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vec4 vertex = { position.x,
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position.y,
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position.z,
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1.0f };
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// in three-dimensional screen space
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vec4 v = transform * vertex;
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float x = v.x / v.w;
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float y = -v.y / v.w;
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float z = v.w / v.z;
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x = x * 240.f + 320.f;
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y = y * 240.f + 240.f;
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// perspective divide
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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,
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y,
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z,
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1.0f, // 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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}
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void init_texture_memory(const struct opb_size& opb_size)
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{
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region_array2(640 / 32, // width
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480 / 32, // height
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opb_size
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);
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background_parameter(0xff220000);
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}
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void main()
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{
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video_output::set_mode_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::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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float delta = 0;
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uint32_t frame_ix = 0;
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while (true) {
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viewer viewer {
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.position = {0.f, -1.f, -2.f},
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.orientation = {0.f, -1.f, 0.f}, // approximate "up" orientation
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.azimuth = 0,
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.colatitude = pi / 4.f * sin(delta) * 0.9f,
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};
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const vec3 plane_normal = view_space::viewing_direction(viewer.azimuth, viewer.colatitude);
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const vec3 up_vector = view_space::project_vector_to_plane(plane_normal, viewer.orientation);
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const mat4x4 view_space_transform = view_space::transformation_matrix(viewer.position, plane_normal, up_vector);
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const mat4x4 perspective_transform = screen_space::transformation_matrix(1.f, // the z-coordinate of the view window
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100.f, // the z-coordinate of the far clip plane
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1.f // the dimension of the square view window
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);
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const mat4x4 screen_transform = perspective_transform * view_space_transform;
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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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{
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constexpr mat4x4 world_transform = { 1.f, 0.f, 0.f, 0.f,
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0.f, 1.f, 0.f, 0.f,
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0.f, 0.f, 1.f, 3.f,
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0.f, 0.f, 0.f, 1.f };
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ta_upload(parameter,
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suzanne::vertices,
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suzanne::faces,
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suzanne::num_faces,
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world_transform,
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screen_transform
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);
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}
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{
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constexpr mat4x4 world_transform = { 0.1f, 0.f, 0.f, 0.f,
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0.f, 0.1f, 0.f, 1.2f,
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0.f, 0.f, 0.1f, 3.f,
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0.f, 0.f, 0.f, 1.f };
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ta_upload(parameter,
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plane::vertices,
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plane::faces,
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plane::num_faces,
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world_transform,
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screen_transform
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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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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);
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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);
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while (spg_status::vsync(holly.SPG_STATUS));
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frame_ix = (frame_ix + 1) & 1;;
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delta += pi * 2 / 360;
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}
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}
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