Add text rendering tests

1 files changed, 180 insertions, 0 deletions

diff --git a/graphics.c b/graphics.c
index 5e9790e..38bbd7c 100644
--- a/graphics.c
+++ b/graphics.c
@@ -2734,6 +2734,186 @@ TEST("text digits 42") {
   REQUIRE(ok);
 }
 
+TEST("text cursor") {
+  i64 w = 10;
+  i64 h = 10;
+
+  vec4_f32 pixels[100] = {0};
+
+  draw_text_cursor_to_buffer(
+    (Pixel_Buffer) {
+      .width  = w,
+      .height = h,
+      .stride = w,
+      .pixels = pixels,
+    },
+    0,
+    (vec4_f32) { 1.0f, 1.0f, 1.0f, 1.0f, },
+    (Box)      { .x = 1.0, .y = 1.0, .width = 8.1, .height = 6.1, },
+    (vec2)     { .x = 10.0, .y = 10.0, },
+    2,
+    (c32[2])   { 'a', 'a', },
+    1,
+    0
+  );
+
+  // printf("\n");
+  // for (i64 j = 0; j < h; ++j) {
+  //   for (i64 i = 0; i < w; ++i) {
+  //     printf(" %c", pixels[j * w + i].x > 0.5 ? 'x' : '.');
+  //   }
+  //   printf("\n");
+  // }
+  // printf("\n");
+
+  b8 expect_bits[100] = {
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  };
+
+  b8 ok = 1;
+
+  for (i64 i = 0; i < w * h; ++i) {
+    if (expect_bits[i] != (pixels[i].x > 0.5) ||
+        expect_bits[i] != (pixels[i].y > 0.5) ||
+        expect_bits[i] != (pixels[i].z > 0.5) ||
+        expect_bits[i] != (pixels[i].w > 0.5)) {
+      ok = 0;
+      break;
+    }
+  }
+
+  REQUIRE(ok);
+}
+
+TEST("text selection forward") {
+  i64 w = 10;
+  i64 h = 10;
+
+  vec4_f32 pixels[100] = {0};
+
+  draw_text_cursor_to_buffer(
+    (Pixel_Buffer) {
+      .width  = w,
+      .height = h,
+      .stride = w,
+      .pixels = pixels,
+    },
+    0,
+    (vec4_f32) { 1.0f, 1.0f, 1.0f, 1.0f, },
+    (Box)      { .x = 1.0, .y = 1.0, .width = 8.1, .height = 6.1, },
+    (vec2)     { .x = 3.0, .y = 2.0, },
+    14,
+    (c32[14])   { 'a', 'a', 'a', 'a', '\n', 'b', 'b', 'b', 'b', '\n', 'c', 'c', 'c', 'c', },
+    2,
+    10
+  );
+
+  // printf("\n");
+  // for (i64 j = 0; j < h; ++j) {
+  //   for (i64 i = 0; i < w; ++i) {
+  //     printf(" %c", pixels[j * w + i].x > 0.5 ? 'x' : '.');
+  //   }
+  //   printf("\n");
+  // }
+  // printf("\n");
+
+  b8 expect_bits[100] = {
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 1, 1, 1, 1, 0,
+    0, 0, 0, 0, 0, 1, 1, 1, 1, 0,
+    0, 1, 1, 1, 1, 1, 1, 1, 1, 0,
+    0, 1, 1, 1, 1, 1, 1, 1, 1, 0,
+    0, 1, 1, 1, 1, 0, 0, 0, 0, 0,
+    0, 1, 1, 1, 1, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  };
+
+  b8 ok = 1;
+
+  for (i64 i = 0; i < w * h; ++i) {
+    if (expect_bits[i] != (pixels[i].x > 0.5) ||
+        expect_bits[i] != (pixels[i].y > 0.5) ||
+        expect_bits[i] != (pixels[i].z > 0.5) ||
+        expect_bits[i] != (pixels[i].w > 0.5)) {
+      ok = 0;
+      break;
+    }
+  }
+
+  REQUIRE(ok);
+}
+
+TEST("text selection backward") {
+  i64 w = 10;
+  i64 h = 10;
+
+  vec4_f32 pixels[100] = {0};
+
+  draw_text_cursor_to_buffer(
+    (Pixel_Buffer) {
+      .width  = w,
+      .height = h,
+      .stride = w,
+      .pixels = pixels,
+    },
+    0,
+    (vec4_f32) { 1.0f, 1.0f, 1.0f, 1.0f, },
+    (Box)      { .x = 1.0, .y = 1.0, .width = 8.1, .height = 6.1, },
+    (vec2)     { .x = 3.0, .y = 2.0, },
+    14,
+    (c32[14])   { 'a', 'a', 'a', 'a', '\n', 'b', 'b', 'b', 'b', '\n', 'c', 'c', 'c', 'c', },
+    12,
+    -10
+  );
+
+  // printf("\n");
+  // for (i64 j = 0; j < h; ++j) {
+  //   for (i64 i = 0; i < w; ++i) {
+  //     printf(" %c", pixels[j * w + i].x > 0.5 ? 'x' : '.');
+  //   }
+  //   printf("\n");
+  // }
+  // printf("\n");
+
+  b8 expect_bits[100] = {
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 1, 1, 1, 1, 0,
+    0, 0, 0, 0, 0, 1, 1, 1, 1, 0,
+    0, 1, 1, 1, 1, 1, 1, 1, 1, 0,
+    0, 1, 1, 1, 1, 1, 1, 1, 1, 0,
+    0, 1, 1, 1, 1, 0, 0, 0, 0, 0,
+    0, 1, 1, 1, 1, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+  };
+
+  b8 ok = 1;
+
+  for (i64 i = 0; i < w * h; ++i) {
+    if (expect_bits[i] != (pixels[i].x > 0.5) ||
+        expect_bits[i] != (pixels[i].y > 0.5) ||
+        expect_bits[i] != (pixels[i].z > 0.5) ||
+        expect_bits[i] != (pixels[i].w > 0.5)) {
+      ok = 0;
+      break;
+    }
+  }
+
+  REQUIRE(ok);
+}
+
 #undef TEST_FILE
 #endif // ENABLE_TESTING