gastro: render test scene

1 files changed, 3 insertions, 197 deletions

diff --git a/gastro/src/main.c b/gastro/src/main.c
index af2e3aa..b0caf7c 100644
--- a/gastro/src/main.c
+++ b/gastro/src/main.c
@@ -6,204 +6,18 @@
 #include <lcq/qoi.h>
 
 #include <lcq/gastro.h>
+#include <lcq/gastro/test.h>
 
 /* #include "../converted_model.h" */
 
-i64 off = 0;
-qoi_color *TEXTURE;
-i64 TEXTURE_WIDTH;
-i64 TEXTURE_HEIGHT;
-
-#define QUADIDX(p0, p1, p2, p3) p0, p1, p2, p2, p3, p0
-#define COLOR(r, g, b) gastro_fix_new(r), gastro_fix_new(g), gastro_fix_new(b)
-static void draw_quad(gastro_ctx *ctx, gastro_program *p) {
-    gastro_fix sz = GASTRO_FIX_HALF;
-    gastro_fix verts[] = {
-        /* front */
-        -sz, -sz, -sz, 0, 0,
-        +sz, -sz, -sz, GASTRO_FIX_ONE, 0,
-        +sz, +sz, -sz, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        -sz, +sz, -sz, 0, GASTRO_FIX_ONE
-    };
-    i64 idxs[] = {
-        QUADIDX(0, 1, 2, 3), /* front */
-    };
-    gastro_render_triangles(ctx, p, verts, 5, idxs, 2);
-}
-static void draw_cube(gastro_ctx *ctx, gastro_program *p) {
-    static gastro_fix verts[] = {
-        /* front */
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, 0, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, 0, GASTRO_FIX_ONE,
-        /* right */
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, 0, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, 0, GASTRO_FIX_ONE,
-        /* left */
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, 0, 0,
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, 0, GASTRO_FIX_ONE,
-        /* top */
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, 0, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, 0, GASTRO_FIX_ONE,
-        /* bottom */
-        -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, 0, 0,
-        +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, 0, GASTRO_FIX_ONE,
-        /* back */
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, 0, 0,
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, +GASTRO_FIX_HALF, 0, GASTRO_FIX_ONE
-    };
-    static i64 idxs[] = {
-        QUADIDX(0, 1, 2, 3), /* front */
-        QUADIDX(4, 5, 6, 7), /* right */
-        QUADIDX(8, 9, 10, 11), /* left */
-        QUADIDX(12, 13, 14, 15), /* top */
-        QUADIDX(16, 17, 18, 19), /* bottom */
-        QUADIDX(20, 21, 22, 23) /* back */
-    };
-    gastro_render_triangles(ctx, p, verts, 5, idxs, 12);
-}
-static void draw_pyramid(gastro_ctx *ctx, gastro_program *p) {
-    static gastro_fix verts[] = {
-        /* front */
-        0, +GASTRO_FIX_HALF, 0, 0, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        /* right */
-        0, +GASTRO_FIX_HALF, 0, 0, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        /* left */
-        0, +GASTRO_FIX_HALF, 0, 0, 0,
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        /* back */
-        0, +GASTRO_FIX_HALF, 0, 0, 0,
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        /* bottom */
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, 0, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, GASTRO_FIX_ONE, 0,
-        +GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, GASTRO_FIX_ONE, GASTRO_FIX_ONE,
-        -GASTRO_FIX_HALF, -GASTRO_FIX_HALF, +GASTRO_FIX_HALF, 0, GASTRO_FIX_ONE,
-    };
-    static i64 idxs[] = {
-        0, 1, 2,
-        3, 4, 5,
-        6, 7, 8,
-        9, 10, 11,
-        QUADIDX(12, 13, 14, 15),
-    };
-    gastro_render_triangles(ctx, p, verts, 5, idxs, 6);
-}
-
-static gastro_vec4 vertex_shader(gastro_ctx *ctx, gastro_vec3 in, gastro_fix *attrs, i64 attrs_len) {
-    gastro_fix x = gastro_fix_from_double((double) off / 1000.0);
-    gastro_vec4 v = gastro_vec4_new(in.x, in.y, in.z, GASTRO_FIX_ONE);
-    gastro_mat4x4 scale = gastro_mat4x4_new(
-        gastro_fix_from_double(1.0), 0, 0, 0,
-        0, gastro_fix_from_double(1.0), 0, 0,
-        0, 0, gastro_fix_from_double(1.0), 0,
-        0, 0, 0, GASTRO_FIX_ONE
-    );
-    u8 theta = (u8) (off / 4);
-    /* u8 theta = 13; */
-    gastro_mat4x4 rot = gastro_mat4x4_new(
-        GASTRO_FIX_ONE, 0, 0, 0,
-        0, gastro_cos(theta), -gastro_sin(theta), 0,
-        0, gastro_sin(theta), gastro_cos(theta), 0,
-        0, 0, 0, GASTRO_FIX_ONE
-    );
-    gastro_mat4x4 trans = gastro_mat4x4_new(
-        GASTRO_FIX_ONE, 0, 0, gastro_fix_new(0), /* x,*/
-        0, GASTRO_FIX_ONE, 0, gastro_fix_new(1),
-        0, 0, GASTRO_FIX_ONE, gastro_fix_new(-3),
-        0, 0, 0, GASTRO_FIX_ONE
-    );
-    gastro_mat4x4 proj = gastro_mat4x4_new(
-        GASTRO_FIX_ONE, 0, 0, 0,
-        0, GASTRO_FIX_ONE, 0, 0,
-        0, 0, GASTRO_FIX_ONE, 0,
-        0, 0, GASTRO_FIX_ONE, 0
-    );
-    v = gastro_mat4x4_mul_vec4(scale, v);
-    v = gastro_mat4x4_mul_vec4(rot, v);
-    v = gastro_mat4x4_mul_vec4(trans, v);
-    v = gastro_mat4x4_mul_vec4(proj, v);
-    return v;
-}
-
-static gastro_color fragment_shader_texture(gastro_ctx *ctx, gastro_vec3 in, gastro_fix *attrs, i64 attrs_len) {
-    gastro_fix u = attrs[0];
-    gastro_fix v = attrs[1];
-    i64 x = gastro_fix_to_i64(gastro_fix_mul(gastro_fix_new(TEXTURE_WIDTH), u));
-    i64 y = gastro_fix_to_i64(gastro_fix_mul(gastro_fix_new(TEXTURE_HEIGHT), v));
-    qoi_color c = TEXTURE[y * TEXTURE_WIDTH + x];
-    return gastro_color_new(c.r, c.g, c.b, c.a);
-}
-
-static gastro_color fragment_shader_teapot(gastro_ctx *ctx, gastro_vec3 in, gastro_fix *attrs, i64 attrs_len) {
-    u8 col = (u8) gastro_fix_to_i64(
-        gastro_fix_mul(
-            gastro_fix_new(0xff),
-            gastro_fix_div(in.z, gastro_fix_new(8))
-        )
-    );
-    return gastro_color_new(0xff - col, 0xff - col, 0xff - col, 0xff);
-}
-
-void load_image(char *path) {
-    FILE *f;
-    u8 *buf;
-    i64 len;
-    qoi_decoder q;
-    qoi_header h;
-    qoi_color *pixels;
-    if (!(f = fopen(path, "r"))) {
-        fprintf(stderr, "failed to open file: %s\n", path);
-        return;
-    }
-    fseek(f, 0, SEEK_END);
-    len = ftell(f);
-    fseek(f, 0, SEEK_SET);
-    buf = calloc((size_t) len, sizeof(u8));
-    fread(buf, sizeof(u8), (size_t) len, f);
-    qoi_decoder_new(&q, buf, len);
-    if (!qoi_decode_header(&q, &h)) {
-        fprintf(stderr, "failed to decode header\n");
-        return;
-    }
-    pixels = calloc(h.width * h.height, sizeof(qoi_color));
-    qoi_decode(&q, &h, pixels);
-    TEXTURE = pixels;
-    TEXTURE_WIDTH = h.width;
-    TEXTURE_HEIGHT = h.height;
-}
-
 int main(int argc, char **argv) {
     gastro_ctx ctx;
     u32 width = 256, height = 256;
     gastro_color *pixels = calloc(width * height, sizeof(gastro_color));
     gastro_fix *depth = calloc(width * height, sizeof(gastro_fix));
-    gastro_program p;
     gastro_ctx_init(&ctx, width, height, pixels, depth);
-    p.vertex = vertex_shader;
-    p.fragment = fragment_shader_texture;
-
-    load_image("mark2.qoi");
 
-    /* gastro_draw_clear(&ctx, gastro_color_new(0, 0, 0, 0xff)); */
-    /* draw_model(&ctx, &p); */
+    gastro_test_create();
 
     InitWindow(800, 600, "test");
     {
@@ -217,17 +31,9 @@ int main(int argc, char **argv) {
         tex = LoadTextureFromImage(im);
         SetTargetFPS(300);
         while (!WindowShouldClose()) {
-            i64 i;
             Vector2 pos;
             pos.x = 10; pos.y = 10;
-            gastro_draw_clear(&ctx, gastro_color_new(0, 0, 0, 0xff));
-            for (i = 0; i < 1; ++i) {
-                draw_pyramid(&ctx, &p);
-            }
-            /* draw_quad(&ctx, &p); */
-            /* draw_model(&ctx, &p); */
-            off += 1;
-            off %= 256 * 64;
+            gastro_test_render(&ctx);
             BeginDrawing();
             ClearBackground(RED);
             UpdateTexture(tex, ctx.pixels);