| 5 | #include "fl/gfx/gfx.h" |
| 6 | |
| 7 | FL_TEST_FILE(FL_FILEPATH) { |
| 8 | |
| 9 | FL_TEST_CASE("drawRing basic rendering") { |
| 10 | FL_SUBCASE("center hole is transparent in ring") { |
| 11 | CRGB buffer[1024] = {}; |
| 12 | fl::CanvasRGB canvas(buffer, 32, 32); |
| 13 | |
| 14 | canvas.drawRing(CRGB(255, 0, 0), 15.5f, 15.5f, 5.0f, 2.0f); |
| 15 | |
| 16 | // Center pixel (15, 15) should be black (inside hole) |
| 17 | FL_CHECK_EQ(buffer[15 * 32 + 15].r, 0); |
| 18 | } |
| 19 | |
| 20 | FL_SUBCASE("band is lit at r+thickness/2") { |
| 21 | CRGB buffer[1024] = {}; |
| 22 | fl::CanvasRGB canvas(buffer, 32, 32); |
| 23 | |
| 24 | canvas.drawRing(CRGB(255, 0, 0), 15.5f, 15.5f, 5.0f, 2.0f); |
| 25 | |
| 26 | // Pixel at r + thickness/2 from center should be non-zero |
| 27 | bool found_lit = false; |
| 28 | for (int y = 10; y < 21; ++y) { |
| 29 | for (int x = 10; x < 21; ++x) { |
| 30 | float dist = fl::sqrt((x - 15.5f) * (x - 15.5f) + (y - 15.5f) * (y - 15.5f)); |
| 31 | if (dist > 5.5f && dist < 6.5f && buffer[y * 32 + x].r > 0) { |
| 32 | found_lit = true; |
| 33 | break; |
| 34 | } |
| 35 | } |
| 36 | if (found_lit) break; |
| 37 | } |
| 38 | FL_CHECK(found_lit); |
| 39 | } |
| 40 | |
| 41 | FL_SUBCASE("outside ring is black") { |
| 42 | CRGB buffer[1024] = {}; |
| 43 | fl::CanvasRGB canvas(buffer, 32, 32); |
| 44 | |
| 45 | canvas.drawRing(CRGB(255, 0, 0), 15.5f, 15.5f, 5.0f, 2.0f); |
| 46 | |
| 47 | // Pixel far outside the ring should be black |
| 48 | FL_CHECK_EQ(buffer[25 * 32 + 15].r, 0); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | FL_TEST_CASE("drawRing antialiasing") { |
| 53 | FL_SUBCASE("inner AA fringe") { |
| 54 | CRGB buffer[1024] = {}; |
| 55 | fl::CanvasRGB canvas(buffer, 32, 32); |
| 56 | |
| 57 | canvas.drawRing(CRGB(255, 0, 0), 15.5f, 15.5f, 5.0f, 2.0f); |
| 58 | |
| 59 | // Find a pixel at approximately r from center - should have intermediate brightness |
| 60 | bool found_aa = false; |
| 61 | for (int y = 10; y < 21; ++y) { |
| 62 | for (int x = 10; x < 21; ++x) { |
| 63 | float dist = fl::sqrt((x - 15.5f) * (x - 15.5f) + (y - 15.5f) * (y - 15.5f)); |
| 64 | if (dist > 4.5f && dist < 5.5f) { |