test(assets): Add tests for Texture Asset support

- Added test_image.tga (generated via tools/gen_test_tga.cc).
- Updated test_assets_list.txt to include the TGA.
- Updated test_assets.cc to verify image decompression and pixel values.

1 files changed, 35 insertions, 0 deletions

diff --git a/tools/gen_test_tga.cc b/tools/gen_test_tga.cc
new file mode 100644
index 0000000..7414eea
--- /dev/null
+++ b/tools/gen_test_tga.cc
@@ -0,0 +1,35 @@
+#include <cstdio>
+#include <cstdint>
+
+int main() {
+    FILE* f = fopen("assets/final/test_image.tga", "wb");
+    if (!f) return 1;
+
+    // TGA Header (Uncompressed True-Color, 2x2, 32-bit)
+    uint8_t header[18] = {
+        0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+        2, 0, // Width: 2 (LE)
+        2, 0, // Height: 2 (LE)
+        32,   // Depth: 32 bit
+        0x28  // Descriptor: Top-Left origin, 8-bit alpha
+    };
+    fwrite(header, 1, 18, f);
+
+    // Pixel Data (BGRA order for TGA usually, but let's see what stbi expects/returns)
+    // stbi converts to requested format (RGBA).
+    // Let's write BGRA: 
+    // Pixel 0 (0,0): Red   -> 00 00 FF FF
+    // Pixel 1 (1,0): Green -> 00 FF 00 FF
+    // Pixel 2 (0,1): Blue  -> FF 00 00 FF
+    // Pixel 3 (1,1): White -> FF FF FF FF
+    
+    uint8_t pixels[] = {
+        0x00, 0x00, 0xFF, 0xFF, // Red
+        0x00, 0xFF, 0x00, 0xFF, // Green
+        0xFF, 0x00, 0x00, 0xFF, // Blue
+        0xFF, 0xFF, 0xFF, 0xFF  // White
+    };
+    fwrite(pixels, 1, sizeof(pixels), f);
+    fclose(f);
+    return 0;
+}