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-rw-r--r--src/modules/submit/submit.c224
1 files changed, 195 insertions, 29 deletions
diff --git a/src/modules/submit/submit.c b/src/modules/submit/submit.c
index 18886d8..7c4a9b6 100644
--- a/src/modules/submit/submit.c
+++ b/src/modules/submit/submit.c
@@ -30,47 +30,180 @@
#define GRID_SIZE 60
#define TICKS_PER_FRAME 8000
-static uint32_t colors[NUM_PLAYERS + 1] = {
- 0x00000000, /* uninitialized cell starts black, becomes winner colors */
- 0xffff5000, /* orange */
- 0xff1020ff, /* blue */
- 0xffe00000, /* red */
- 0xff2ad726, /* green */
- 0xff00e0d0, /* cyan */
- 0xffd000ff, /* purple */
- 0xffe7ef00, /* yellow */
- 0x00000000, /* black */
+typedef struct color_t {
+ float r, g, b;
+} color_t;
+
+static color_t colors[NUM_PLAYERS + 1] = {
+ {}, /* uninitialized cell starts black, becomes winner colors */
+ {1.f, .317f, 0.f }, /* orange */
+ {.627f, .125f, 1.f }, /* blue */
+ {.878f, 0.f, 0.f }, /* red */
+ {.165f, .843f, .149f }, /* green */
+ {0.f, .878f, .815f }, /* cyan */
+ {.878f, 0.f, 1.f }, /* purple */
+ {.906f, .937f, 0.f }, /* yellow */
+ {}, /* black */
};
+
typedef struct submit_context_t {
grid_t *grid;
grid_player_t *players[NUM_PLAYERS];
uint32_t seq;
uint32_t game_winner;
- fb_fragment_t *fragment;
- uint32_t cells[GRID_SIZE * GRID_SIZE];
+ uint8_t cells[GRID_SIZE * GRID_SIZE];
} submit_context_t;
-/* TODO: drawing is not optimized at all */
-static void draw_cell(fb_fragment_t *fragment, int x, int y, int w, int h, uint32_t color)
+/* convert a color into a packed, 32-bit rgb pixel value (taken from libs/ray/ray_color.h) */
+static inline uint32_t color_to_uint32(color_t color) {
+ uint32_t pixel;
+
+ if (color.r > 1.0f) color.r = 1.0f;
+ if (color.g > 1.0f) color.g = 1.0f;
+ if (color.b > 1.0f) color.b = 1.0f;
+
+ pixel = (uint32_t)(color.r * 255.0f);
+ pixel <<= 8;
+ pixel |= (uint32_t)(color.g * 255.0f);
+ pixel <<= 8;
+ pixel |= (uint32_t)(color.b * 255.0f);
+
+ return pixel;
+}
+
+
+static inline float clamp(float x, float lowerlimit, float upperlimit) {
+ if (x < lowerlimit)
+ x = lowerlimit;
+
+ if (x > upperlimit)
+ x = upperlimit;
+
+ return x;
+}
+
+
+/* taken from https://en.wikipedia.org/wiki/Smoothstep#Variations */
+static inline float smootherstep(float edge0, float edge1, float x) {
+ x = clamp((x - edge0) / (edge1 - edge0), 0.f, 1.f);
+
+ return x * x * x * (x * (x * 6.f - 15.f) + 10.f);
+}
+
+
+/* linearly interpolate colors */
+static color_t color_lerp(color_t *a, color_t *b, float t)
+{
+ color_t res = {
+ .r = a->r * (1.f - t) + b->r * t,
+ .g = a->g * (1.f - t) + b->g * t,
+ .b = a->b * (1.f - t) + b->b * t,
+ };
+
+ return res;
+}
+
+
+/* bilinearly interpolate colors from 4 cells */
+static inline uint32_t sample_grid_bilerp(submit_context_t *ctxt, float x, float y)
+{
+ int i, ix = x, iy = y;
+ float x_t, y_t;
+ uint8_t corners[2][2];
+ color_t x1, x2;
+
+ /* FIXME TODO: this short-circuit produces unsmoothed cells at the
+ * periphery, and could be simply avoided by putting the peripheral
+ * cells off-screen so all the samples are within the boundaries.
+ * Ignoring for now.
+ */
+ if (ix < 1 || ix > GRID_SIZE - 2 ||
+ iy < 1 || iy > GRID_SIZE - 2)
+ return color_to_uint32(colors[ctxt->cells[iy * GRID_SIZE + ix]]);
+
+ i = iy * GRID_SIZE + ix;
+
+ /* ix,iy forms the corner of a 2x2 kernel, determine which corner */
+ if (x > ix + .5f) {
+ x_t = x - ((float)ix + .5f);
+
+ if (y > iy + .5f) {
+ /* NW corner */
+ y_t = y - ((float)iy + .5f);
+
+ corners[0][0] = ctxt->cells[i];
+ corners[0][1] = ctxt->cells[i + 1];
+ corners[1][0] = ctxt->cells[i + GRID_SIZE];
+ corners[1][1] = ctxt->cells[i + GRID_SIZE + 1];
+ } else {
+ /* SW corner */
+ y_t = 1.f - (((float)iy + .5f) - y);
+
+ corners[1][0] = ctxt->cells[i];
+ corners[1][1] = ctxt->cells[i + 1];
+ corners[0][0] = ctxt->cells[i - GRID_SIZE];
+ corners[0][1] = ctxt->cells[i - GRID_SIZE + 1];
+ }
+ } else {
+ x_t = 1.f - (((float)ix + .5f) - x);
+
+ if (y > iy + .5f) {
+ /* NE corner */
+ y_t = y - ((float)iy + .5f);
+
+ corners[0][1] = ctxt->cells[i];
+ corners[0][0] = ctxt->cells[i - 1];
+ corners[1][1] = ctxt->cells[i + GRID_SIZE];
+ corners[1][0] = ctxt->cells[i + GRID_SIZE - 1];
+ } else {
+ /* SE corner */
+ y_t = 1.f - (((float)iy + .5f) - y);
+
+ corners[1][1] = ctxt->cells[i];
+ corners[1][0] = ctxt->cells[i - 1];
+ corners[0][1] = ctxt->cells[i - GRID_SIZE];
+ corners[0][0] = ctxt->cells[i - GRID_SIZE - 1];
+ }
+ }
+
+ /* short-circuit cases where interpolation obviously wouldn't do anything */
+ if (corners[0][0] == corners[0][1] &&
+ corners[0][1] == corners[1][1] &&
+ corners[1][1] == corners[1][0])
+ return color_to_uint32(colors[corners[0][0]]);
+
+ x_t = smootherstep(0.f, 1.f, x_t);
+ y_t = smootherstep(0.f, 1.f, y_t);
+
+ x1 = color_lerp(&colors[corners[0][0]], &colors[corners[0][1]], x_t);
+ x2 = color_lerp(&colors[corners[1][0]], &colors[corners[1][1]], x_t);
+
+ return color_to_uint32(color_lerp(&x1, &x2, y_t));
+}
+
+
+static inline uint32_t sample_grid(submit_context_t *ctxt, float x, float y)
{
- for (int yy = 0; yy < h; yy++)
- for (int xx = 0; xx < w; xx++)
- fb_fragment_put_pixel_checked(fragment, x + xx, y + yy, color);
+ return color_to_uint32(colors[ctxt->cells[(int)y * GRID_SIZE + (int)x]]);
}
-static void draw_grid(submit_context_t *ctxt, fb_fragment_t *fragment)
+static void draw_grid(submit_context_t *ctxt, fb_fragment_t *fragment, uint32_t (*sampler)(submit_context_t *ctxt, float x, float y))
{
- int w = fragment->width / GRID_SIZE;
- int h = fragment->height / GRID_SIZE;
- int xoff = (fragment->width - w * GRID_SIZE) / 2;
- int yoff = (fragment->height - h * GRID_SIZE) / 2;
+ float xscale = (float)GRID_SIZE / (float)fragment->frame_width;
+ float yscale = (float)GRID_SIZE / (float)fragment->frame_height;
- for (int y = 0; y < GRID_SIZE; y++)
- for (int x = 0; x < GRID_SIZE; x++)
- draw_cell(fragment, xoff + x * w, yoff + y * h, w, h, colors[ctxt->cells[y * GRID_SIZE + x]]);
+ for (int y = 0; y < fragment->height; y++) {
+ for (int x = 0; x < fragment->width; x++) {
+ uint32_t color;
+
+ /* TODO: this could be optimized a bit! i.e. don't recompute the y for every x etc. */
+ color = sampler(ctxt, ((float)(fragment->x + x)) * xscale, ((float)(fragment->y + y)) * yscale);
+ fb_fragment_put_pixel_unchecked(fragment, fragment->x + x, fragment->y + y, color);
+ }
+ }
}
@@ -139,11 +272,17 @@ static void submit_destroy_context(void *context)
}
-static void submit_render_fragment(void *context, fb_fragment_t *fragment)
+static int submit_fragmenter(void *context, const fb_fragment_t *fragment, unsigned num, fb_fragment_t *res_fragment)
+{
+ return fb_fragment_tile_single(fragment, 32, num, res_fragment);
+}
+
+
+static void submit_prepare_frame(void *context, unsigned n_cpus, fb_fragment_t *fragment, rototiller_fragmenter_t *res_fragmenter)
{
submit_context_t *ctxt = context;
- ctxt->fragment = fragment;
+ *res_fragmenter = submit_fragmenter;
if (ctxt->game_winner)
setup_grid(ctxt);
@@ -157,17 +296,44 @@ static void submit_render_fragment(void *context, fb_fragment_t *fragment)
for (int j = 0; j < TICKS_PER_FRAME; j++)
grid_tick(ctxt->grid);
+}
+
+
+static void submit_render_fragment(void *context, fb_fragment_t *fragment)
+{
+ submit_context_t *ctxt = context;
+
+ draw_grid(ctxt, fragment, sample_grid);
+}
+
+
+static void submit_softly_render_fragment(void *context, fb_fragment_t *fragment)
+{
+ submit_context_t *ctxt = context;
- draw_grid(ctxt, fragment);
+ draw_grid(ctxt, fragment, sample_grid_bilerp);
}
rototiller_module_t submit_module = {
.create_context = submit_create_context,
.destroy_context = submit_destroy_context,
+ .prepare_frame = submit_prepare_frame,
.render_fragment = submit_render_fragment,
.name = "submit",
- .description = "Cellular automata conquest game sim",
+ .description = "Cellular automata conquest game sim (threaded (poorly))",
+ .author = "Vito Caputo <vcaputo@pengaru.com>",
+ .license = "GPLv3",
+};
+
+
+rototiller_module_t submit_softly_module = {
+ .create_context = submit_create_context,
+ .destroy_context = submit_destroy_context,
+ .prepare_frame = submit_prepare_frame,
+ .render_fragment = submit_softly_render_fragment,
+ .name = "submit-softly",
+ .description = "Cellular automata conquest game sim w/bilinear interpolation (threaded (poorly))",
.author = "Vito Caputo <vcaputo@pengaru.com>",
.license = "GPLv3",
};
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