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.
224 lines
7.2 KiB
C++
224 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/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/isp_tsp.hpp"
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#include "holly/region_array.hpp"
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#include "holly/background.hpp"
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#include "memorymap.hpp"
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#include "macaw.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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vertex cube_faces[][4] = {
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{ // front
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{ -1.0f, -1.0f, 1.0f, 0.f, 0.f},
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{ -1.0f, 1.0f, 1.0f, 0.f, 1.f},
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{ 1.0f, -1.0f, 1.0f, 1.f, 0.f},
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{ 1.0f, 1.0f, 1.0f, 1.f, 1.f},
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},
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{ // back
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{ -1.0f, -1.0f, -1.0f, 1.f, 0.f},
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{ -1.0f, 1.0f, -1.0f, 1.f, 1.f},
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{ 1.0f, -1.0f, -1.0f, 0.f, 0.f},
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{ 1.0f, 1.0f, -1.0f, 0.f, 1.f},
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},
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{ // right side
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{ 1.0f, -1.0f, 1.0f, 0.f, 0.f},
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{ 1.0f, 1.0f, 1.0f, 0.f, 1.f},
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{ 1.0f, -1.0f, -1.0f, 1.f, 0.f},
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{ 1.0f, 1.0f, -1.0f, 1.f, 1.f},
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},
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{ // left side
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{ -1.0f, -1.0f, 1.0f, 1.f, 0.f},
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{ -1.0f, 1.0f, 1.0f, 1.f, 1.f},
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{ -1.0f, -1.0f, -1.0f, 0.f, 0.f},
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{ -1.0f, 1.0f, -1.0f, 0.f, 1.f},
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},
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};
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constexpr uint32_t num_faces = (sizeof (cube_faces)) / (sizeof (cube_faces[0]));
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constexpr uint32_t color = 0xff0000ff;
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static float theta = 0;
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constexpr float half_degree = 0.01745329f / 2.f;
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void transform(ta_parameter_writer& parameter,
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const vertex * strip_vertices,
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const uint32_t strip_length)
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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::packed_color
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| obj_control::texture;
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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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| tsp_instruction_word::texture_u_size::from_int(128)
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| tsp_instruction_word::texture_v_size::from_int(128);
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const uint32_t texture_address = (offsetof (struct texture_memory_alloc, texture));
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const uint32_t texture_control_word = texture_control_word::pixel_format::_565
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| texture_control_word::scan_order::non_twiddled
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| texture_control_word::texture_address(texture_address / 8);
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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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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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for (uint32_t i = 0; i < strip_length; i++) {
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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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float t;
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t = y * __builtin_cosf(theta) - z * __builtin_sinf(theta);
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z = y * __builtin_sinf(theta) + z * __builtin_cosf(theta);
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y = t;
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float theta2 = 3.14 * __builtin_sinf(theta / 2);
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t = x * __builtin_cosf(theta2) - z * __builtin_sinf(theta2);
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z = x * __builtin_sinf(theta2) + z * __builtin_cosf(theta2);
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x = t;
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z += 3;
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// perspective
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x = x / z;
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y = y / z;
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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_3>() =
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ta_vertex_parameter::polygon_type_3(polygon_vertex_parameter_control_word(end_of_strip),
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x, y, z,
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strip_vertices[i].u,
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strip_vertices[i].v,
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0, // base_color
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0 // offset_color
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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, 0xffff00ff);
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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 copy_macaw_texture()
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{
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auto src = reinterpret_cast<const uint8_t *>(&_binary_macaw_data_start);
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auto size = reinterpret_cast<const uint32_t>(&_binary_macaw_data_size);
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auto mem = reinterpret_cast<volatile texture_memory_alloc *>(texture_memory64);
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for (uint32_t px = 0; px < size / 3; px++) {
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uint8_t r = src[px * 3 + 0];
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uint8_t g = src[px * 3 + 1];
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uint8_t b = src[px * 3 + 2];
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uint16_t rgb565 = ((r / 8) << 11) | ((g / 4) << 5) | ((b / 8) << 0);
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mem->texture[px] = rgb565;
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}
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}
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uint32_t _ta_parameter_buf[((32 * (5 * 6 + 1)) + 32) / 4];
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void main()
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{
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vga();
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copy_macaw_texture();
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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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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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for (uint32_t i = 0; i < num_faces; i++) {
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transform(parameter, cube_faces[i], 4);
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}
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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, 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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theta += half_degree;
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frame_ix += 1;
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}
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}
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