added back the software renderervulkan

1 files changed, 9 insertions, 3 deletions

diff --git a/src/fb/pixfb.cpp b/src/fb/pixfb.cpp
index 55c356f..b38ec30 100644
--- a/src/fb/pixfb.cpp
+++ b/src/fb/pixfb.cpp
@@ -24,7 +24,7 @@ void PixelFrameBuffer::resize(unsigned int w, unsigned int h) {
 }
 
 void PixelFrameBuffer::clear() {
-    std::fill(pixels_vector.begin(), pixels_vector.end(), 0x000000FF);
+    std::fill(pixels_vector.begin(), pixels_vector.end(), 0xff000000);
 }
 
 extern Camera* camera;
@@ -41,8 +41,14 @@ void PixelFrameBuffer::draw_point(int x, int y, const Vector3& loc, const Vertex
     else attenuation = (attenuation - .7f) / .1f;
     float light = -normal.dot(u) / u_len_sq;
     if (light < 0.f) light = 0.f;
-    float final_light = .05f + light * attenuation * .8f * .95f;
+    float final_light = .003f + light * attenuation * .8f * .997f;
     if (final_light > 1.f) final_light = 1.f;
+    // gamma correction
+    // TODO: improve, we shouldn't do it here
+    if (final_light <= .0031308f)
+        final_light = final_light * 12.92f;
+    else
+        final_light = 1.055f * pow(final_light, 1.f / 2.4f) - .055f;
     std::uint32_t c = (int) (final_light * 255.f);
-    pixels_vector[x + y * w] = c << 24 | c << 16 | c << 8 | 0xff;
+    pixels_vector[x + y * w] = 0xff000000 | c << 16 | c << 8 | c;
 }