98 lines
2.0 KiB
C++
98 lines
2.0 KiB
C++
#include <azur/gint/render.h>
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#include "MyAzurShaders.h"
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#include <cstdlib>
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#include <cstdio>
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#include <gint/rtc.h>
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#include <gint/usb.h>
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#include <gint/usb-ff-bulk.h>
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uint8_t AZRP_SHADER_STARFIELD = -1;
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#define NBPARTS 100
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struct particle
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{
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int x,y,s,c,frag,off;
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};
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particle datastar[NBPARTS];
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__attribute__((constructor))
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static void register_shader(void)
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{
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extern azrp_shader_t azrp_shader_starfield;
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AZRP_SHADER_STARFIELD = azrp_register_shader(azrp_shader_starfield);
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}
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void azrp_shader_starfield_configure(void)
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{
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azrp_set_uniforms(AZRP_SHADER_STARFIELD, (void *)azrp_width);
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}
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struct command {
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uint8_t shader_id;
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uint8_t current_frag;
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particle *data;
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};
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void azrp_starfield_init( void )
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{
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srand(rtc_ticks());
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for(int i=0; i<NBPARTS; i++)
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{
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datastar[i].x = rand( ) % 396;
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datastar[i].y = rand( ) % 224;
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datastar[i].s = 1 + rand( ) % 4;
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datastar[i].c = 0xFFFF;
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datastar[i].frag = datastar[i].y / 16;
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datastar[i].off = datastar[i].y & 15;
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}
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}
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void azrp_starfield( void )
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{
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prof_enter(azrp_perf_cmdgen);
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struct command cmd;
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cmd.shader_id = AZRP_SHADER_STARFIELD;
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cmd.current_frag = 0;
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cmd.data = datastar;
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for(int i=0; i<NBPARTS; i++)
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{
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datastar[i].y = (datastar[i].y + datastar[i].s) % 224;
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datastar[i].frag = datastar[i].y / 16;
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datastar[i].off = datastar[i].y & 15;
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}
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int fragmin = 0;
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int fragcount = (223 >> 4) + 1;
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azrp_queue_command(&cmd, sizeof cmd, fragmin, fragcount);
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prof_leave(azrp_perf_cmdgen);
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}
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void azrp_shader_starfield( void *uniforms, void *comnd, void *fragment )
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{
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struct command *cmd = (struct command *) comnd;
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uint16_t *frag = (uint16_t *) fragment;
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particle *data = cmd->data;
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for(int i=0; i<NBPARTS; i++)
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if (cmd->current_frag == data[i].frag)
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{
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frag[azrp_width * data[i].off + data[i].x] = data[i].c;
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}
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cmd->current_frag++;
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} |