fix: use BlendMode.Src for video frame rendering

Video frames from Windows Media Foundation have alpha bytes set to 0x00.
With the default SrcOver blend mode, this causes the video to appear
washed out or nearly invisible on light backgrounds, as pixels blend
with the underlying surface color.

Using BlendMode.Src ensures video pixels fully replace the destination,
regardless of the alpha channel value.

Fixes #98

Author: kdroidFilter

mediaplayer/src/commonMain/kotlin/io/github/kdroidfilter/composemediaplayer/util/ContentScaleCanvasUtils.kt

@@ -3,6 +3,7 @@ package io.github.kdroidfilter.composemediaplayer.util
 import androidx.compose.foundation.layout.*
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.BlendMode
 import androidx.compose.ui.graphics.ImageBitmap
 import androidx.compose.ui.graphics.drawscope.DrawScope
 import androidx.compose.ui.layout.ContentScale
@@ -98,7 +99,8 @@ internal fun DrawScope.drawScaledImage(
             image = image,
             srcOffset = IntOffset(srcX, srcY),
             srcSize = IntSize(srcW, srcH),
-            dstSize = dstSize, // draw into full destination rect
+            dstSize = dstSize,
+            blendMode = BlendMode.Src,
         )
     } else {
         /* --------------------------------------------------------------
@@ -109,6 +111,7 @@ internal fun DrawScope.drawScaledImage(
         drawImage(
             image = image,
             dstSize = dstSize,
+            blendMode = BlendMode.Src,
         )
     }
 }