struct glpal_ctx *pal_init_glsl(GLboolean float_packed_pixels)
{CHECK_GL_ERR;
printf("Compiling pallet shader:\n");
GLint prog = 0;
if(!float_packed_pixels)
prog = compile_program(vtx_shader, pal_frag_shader);
else
prog = compile_program(vtx_shader, pal_frag_mix);
if(!prog) return NULL;
glUseProgramObjectARB(prog);
glUniform1iARB(glGetUniformLocationARB(prog, "src"), 0);
glUniform1iARB(glGetUniformLocationARB(prog, "pal"), 1);
glBindAttribLocationARB(prog, 0, "vertex");
glUseProgramObjectARB(0);
printf("Pallet shader compiled\n");
struct priv_ctx *priv = malloc(sizeof(*priv));
priv->pubctx.render = render;
priv->pubctx.step = pal_step;
priv->pubctx.start_switch = start_switch;
priv->pubctx.changing = changing;
priv->pal = pal_ctx_new(0);
priv->prog = prog;
priv->cnt = 0;
glGenTextures(2, &priv->tex);
glBindTexture(GL_TEXTURE_1D, priv->tex[0]);
glTexImage1D(GL_TEXTURE_1D, 0, GL_RGBA, 256, 0, GL_BGRA, GL_UNSIGNED_BYTE, pal_ctx_get_active(priv->pal));
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_1D, 0);
glBindTexture(GL_TEXTURE_1D, priv->tex[1]);
glTexImage1D(GL_TEXTURE_1D, 0, GL_RGBA, 256, 0, GL_BGRA, GL_UNSIGNED_BYTE, pal_ctx_get_active(priv->pal));
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glBindTexture(GL_TEXTURE_1D, 0);
CHECK_GL_ERR;
return (struct glpal_ctx *)priv;
}
static void render(struct glpal_ctx *ctx, GLuint draw_tex)
{DEBUG_CHECK_GL_ERR;
static const float verts[] = {
0, 0 , -1, -1,
1, 0 , 1, -1,
0, 1 , -1, 1,
1, 1 , 1, 1
};
struct priv_ctx *priv = (struct priv_ctx *)ctx;
glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS);
glUseProgramObjectARB(priv->prog);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, draw_tex);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_1D, priv->tex[priv->cnt]);
glTexImage1D(GL_TEXTURE_1D, 0, GL_RGBA, 256, 0, GL_BGRA, GL_UNSIGNED_BYTE, pal_ctx_get_active(priv->pal));
priv->cnt = (priv->cnt+1)%2;
glBindTexture(GL_TEXTURE_1D, priv->tex[priv->cnt]);
glEnableVertexAttribArrayARB(0);
glVertexAttribPointerARB(0, 4, GL_FLOAT, GL_FALSE, sizeof(float)*4, verts);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glUseProgramObjectARB(0);
glDisableVertexAttribArrayARB(0);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_1D, 0);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, 0);
glPopClientAttrib();
DEBUG_CHECK_GL_ERR;
}
// TODO: need a "now" take it as an argument
void simple_soft_render(struct simple_soft_ctx *ctx, Pixbuf *out, int64_t now, int64_t tick0)
{
ctx->m = (ctx->m+1)&0x1;
if(tick0+(ctx->maxfrms*1000)/ctx->maxsrc_rate - now > 1000/ctx->maxsrc_rate) {
maxsrc_update(ctx->maxsrc, ctx->prev_buf, ctx->nr_samp/2);
ctx->maxfrms++;
}
if(!ctx->rational_julia) {
ctx->map_func(ctx->map_surf[ctx->m], ctx->map_surf[(ctx->m+1)&0x1], ctx->im_w, ctx->im_h, ctx->pd);
maxblend(ctx->map_surf[ctx->m], maxsrc_get(ctx->maxsrc), ctx->im_w, ctx->im_h);
}
if(ctx->rational_julia) {
maxblend(ctx->map_surf[(ctx->m+1)&0x1], maxsrc_get(ctx->maxsrc), ctx->im_w, ctx->im_h);
ctx->map_func(ctx->map_surf[ctx->m], ctx->map_surf[(ctx->m+1)&0x1], ctx->im_w, ctx->im_h, ctx->pd);
}
// rather than just audio clock
if((now - ctx->lastpalstep)*256/1024 >= 1) { // want pallet switch to take ~2 seconds
pal_ctx_step(ctx->pal_ctx, IMIN((now - ctx->lastpalstep)*256/1024, 32));
ctx->lastpalstep = now;
}
pallet_blit_Pixbuf(out, ctx->map_surf[ctx->m], ctx->im_w, ctx->im_h, pal_ctx_get_active(ctx->pal_ctx));
//pallet_blit_Pixbuf(out, maxsrc_get(ctx->maxsrc), ctx->im_w, ctx->im_h, pal_ctx_get_active(ctx->pal_ctx));
int newbeat = beat_ctx_count(ctx->beat);
if(newbeat != ctx->beats) pal_ctx_start_switch(ctx->pal_ctx, newbeat);
if(newbeat != ctx->beats && now - ctx->last_beat_time > 1000) {
ctx->last_beat_time = now;
update_points(ctx->pd, (now - tick0), 1);
} else update_points(ctx->pd, (now - tick0), 0);
ctx->beats = newbeat;
}
int main(int argc, char **argv)
{
optproc(argc, argv, &opts); if(audio_init(&opts) < 0) exit(1);
SDL_Surface *screen = sdl_setup(&opts, IM_SIZE);
im_w = screen->w - screen->w%16; im_h = screen->h - screen->h%16;
printf("running with %dx%d bufs\n", im_w, im_h);
if(strcmp(opts.map_name, "rational") == 0) {
map_func = soft_map_rational_interp;
if(opts.quality >= 1) map_func = soft_map_rational;
}
else if(strcmp(opts.map_name, "butterfly") == 0) {
// map_func = soft_map_butterfly_interp;
// if(opts.quality >= 1)
map_func = soft_map_butterfly;
}
else if(opts.quality >= 1) map_func = soft_map;
maxsrc = maxsrc_new(im_w, im_h);
struct pal_ctx *pal_ctx = pal_ctx_new(screen->format->BitsPerPixel == 8);
uint16_t *map_surf[3];
void *map_surf_mem = aligned_alloc(64, 3 * im_w * im_h * sizeof(uint16_t));
for(int i=0; i<3; i++)
map_surf[i] = map_surf_mem + i * im_w * im_h * sizeof(uint16_t);
memset(map_surf_mem, 0, 3 * im_w * im_h * sizeof(uint16_t));
tribuf *map_tb = tribuf_new((void **)map_surf, 1);
int beats = 0;
int frmcnt = 0;
int lastdrawn=0;
SDL_Thread *map_thread = SDL_CreateThread((void *)&run_map_thread, map_tb);
SDL_Delay(100);
uint32_t frametimes[FPS_HIST_LEN]; for(int i=1; i<FPS_HIST_LEN; i++) frametimes[i] = 0;
uint32_t totframetime = frametimes[0] = MIN(1000/opts.draw_rate, 1);
Uint32 tick0 = SDL_GetTicks();
Uint32 lastpalstep, lastupdate, fps_oldtime; fps_oldtime = lastpalstep = lastupdate = tick0;
SDL_Event event;
while(SDL_PollEvent(&event) >= 0)
{
if(event.type == SDL_QUIT || (event.type == SDL_KEYDOWN && event.key.keysym.sym == SDLK_ESCAPE)) {
break;
} else if(tribuf_check_fresh(map_tb)) {
Uint32 now = SDL_GetTicks();
if(now - lastpalstep >= 2048/256) { // want pallet switch to take ~2 seconds
pal_ctx_step(pal_ctx, IMIN((now - lastpalstep)*256/2048, 64));
lastpalstep = now;
}
pallet_blit_SDL(screen, tribuf_get_read(map_tb), im_w, im_h, pal_ctx_get_active(pal_ctx));
tribuf_finish_read(map_tb);
char buf[64];
sprintf(buf,"%6.1f FPS %6.1f UPS %6.1f", map_fps, FPS_HIST_LEN*1000.0f/totframetime, maxfrms*1000.0f/(now-tick0));
DrawText(screen, buf);
SDL_Flip(screen);
int newbeat = beat_get_count();
if(newbeat != beats) pal_ctx_start_switch(pal_ctx, newbeat);
beats = newbeat;
now = SDL_GetTicks();
int delay = (tick0 + frmcnt*1000/opts.draw_rate) - now;
if(delay > 0) SDL_Delay(delay);
totframetime -= frametimes[frmcnt%FPS_HIST_LEN];
totframetime += (frametimes[frmcnt%FPS_HIST_LEN] = now - fps_oldtime);
fps_oldtime = now;
frmcnt++;
} else {
SDL_Delay(1000/opts.draw_rate/2); // wait half a frame and hope we get a new buffer
}
}
running = 0;
int status;
SDL_WaitThread(map_thread, &status);
aligned_free(map_surf_mem);
audio_shutdown();
SDL_Quit();
return 0;
}
