128 lines
3 KiB
C++
128 lines
3 KiB
C++
#include <stdio.h>
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#include "hardware/uart.h"
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#include "pico/multicore.h"
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#include "drivers/dvhstx/dvhstx.hpp"
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#include "libraries/pico_graphics/pico_graphics_dvhstx.hpp"
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extern "C" {
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#include "mandelf.h"
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}
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using namespace pimoroni;
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#define FRAME_WIDTH 640
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#define FRAME_HEIGHT 360
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//#define FRAME_WIDTH 400
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//#define FRAME_HEIGHT 300
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//#define FRAME_WIDTH 320
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//#define FRAME_HEIGHT 180
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static DVHSTX display;
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static PicoGraphics_PenDVHSTX_P8 graphics(FRAME_WIDTH, FRAME_HEIGHT, display);
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static FractalBuffer fractal;
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static void init_palette() {
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graphics.create_pen(0, 0, 0);
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for (int i = 0; i < 64; ++i) {
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graphics.create_pen_hsv(i * (1.f / 63.f), 1.0f, 0.5f + (i & 7) * (0.5f / 7.f));
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}
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}
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static void init_mandel() {
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fractal.rows = FRAME_HEIGHT / 2;
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fractal.cols = FRAME_WIDTH;
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fractal.max_iter = 63;
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fractal.iter_offset = 0;
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fractal.minx = -2.25f;
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fractal.maxx = 0.75f;
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fractal.miny = -1.6f;
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fractal.maxy = 0.f - (1.6f / FRAME_HEIGHT); // Half a row
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fractal.use_cycle_check = true;
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init_fractal(&fractal);
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}
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#define NUM_ZOOMS 100
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static uint32_t zoom_count = 0;
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static void zoom_mandel() {
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if (++zoom_count == NUM_ZOOMS)
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{
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init_mandel();
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zoom_count = 0;
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sleep_ms(2000);
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return;
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}
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float zoomx = -.75f - .7f * ((float)zoom_count / (float)NUM_ZOOMS);
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float sizex = fractal.maxx - fractal.minx;
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float sizey = fractal.miny * -2.f;
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float zoomr = 0.974f * 0.5f;
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fractal.minx = zoomx - zoomr * sizex;
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fractal.maxx = zoomx + zoomr * sizex;
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fractal.miny = -zoomr * sizey;
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fractal.maxy = 0.f + fractal.miny / FRAME_HEIGHT;
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init_fractal(&fractal);
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}
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static void display_row(int y, uint8_t* buf) {
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display.write_palette_pixel_span({0, y}, FRAME_WIDTH, buf);
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display.write_palette_pixel_span({0, FRAME_HEIGHT - 1 - y}, FRAME_WIDTH, buf);
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}
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static uint8_t row_buf_core1[FRAME_WIDTH];
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void core1_main() {
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while (true) {
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int y = multicore_fifo_pop_blocking();
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generate_one_line(&fractal, row_buf_core1, y);
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multicore_fifo_push_blocking(y);
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}
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}
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static uint8_t row_buf[FRAME_WIDTH];
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static void draw_two_rows(int y) {
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multicore_fifo_push_blocking(y+1);
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generate_one_line(&fractal, row_buf, y);
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display_row(y, row_buf);
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multicore_fifo_pop_blocking();
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display_row(y+1, row_buf_core1);
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}
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void draw_mandel() {
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//display.wait_for_flip();
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for (int y = 0; y < FRAME_HEIGHT / 2; y += 2)
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{
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draw_two_rows(y);
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}
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//display.flip_async();
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display.flip_now();
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}
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int main() {
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stdio_init_all();
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display.init(FRAME_WIDTH, FRAME_HEIGHT, DVHSTX::MODE_PALETTE);
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init_palette();
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graphics.set_pen(0);
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graphics.clear();
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display.flip_now();
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graphics.clear();
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multicore_launch_core1(core1_main);
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init_mandel();
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draw_mandel();
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while(true) {
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absolute_time_t start_time = get_absolute_time();
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zoom_mandel();
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draw_mandel();
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printf("Drawing zoom %ld took %.2fms\n", zoom_count, absolute_time_diff_us(start_time, get_absolute_time()) * 0.001f);
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}
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}
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