-void GetRedOffsetAndMask( Dali::Pixel::Format pixelFormat, int& byteOffset, int& bitMask )
-{
- switch( pixelFormat )
- {
- case Dali::Pixel::A8:
- case Dali::Pixel::L8:
- case Dali::Pixel::LA88:
- {
- byteOffset = 0;
- bitMask = 0;
- break;
- }
- case Dali::Pixel::RGB888:
- case Dali::Pixel::RGB8888:
- case Dali::Pixel::RGBA8888:
- {
- byteOffset = 0;
- bitMask = 0xFF;
- break;
- }
- case Dali::Pixel::BGR8888:
- case Dali::Pixel::BGRA8888:
- {
- byteOffset = 2;
- bitMask = 0xff;
- break;
- }
- case Dali::Pixel::RGB565:
- {
- byteOffset = 0;
- bitMask = 0xf8;
- break;
- }
- case Dali::Pixel::BGR565:
- {
- byteOffset = 1;
- bitMask = 0x1f;
- break;
- }
- case Dali::Pixel::RGBA4444:
- {
- byteOffset = 0;
- bitMask = 0xf0;
- break;
- }
- case Dali::Pixel::BGRA4444:
- {
- byteOffset = 1;
- bitMask = 0xf0;
- break;
- }
- case Dali::Pixel::RGBA5551:
- {
- byteOffset = 0;
- bitMask = 0xf8;
- break;
- }
- case Dali::Pixel::BGRA5551:
- {
- byteOffset = 1;
- bitMask = 0x1e;
- break;
- }
- case Dali::Pixel::INVALID:
- case Dali::Pixel::COMPRESSED_R11_EAC:
- case Dali::Pixel::COMPRESSED_SIGNED_R11_EAC:
- case Dali::Pixel::COMPRESSED_RG11_EAC:
- case Dali::Pixel::COMPRESSED_SIGNED_RG11_EAC:
- case Dali::Pixel::COMPRESSED_RGB8_ETC2:
- case Dali::Pixel::COMPRESSED_SRGB8_ETC2:
- case Dali::Pixel::COMPRESSED_RGB8_ETC1:
- case Dali::Pixel::COMPRESSED_RGB_PVRTC_4BPPV1:
- case Dali::Pixel::COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
- case Dali::Pixel::COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
- case Dali::Pixel::COMPRESSED_RGBA8_ETC2_EAC:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_4x4_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_5x4_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_5x5_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_6x5_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_6x6_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_8x5_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_8x6_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_8x8_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_10x5_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_10x6_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_10x8_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_10x10_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_12x10_KHR:
- case Dali::Pixel::COMPRESSED_RGBA_ASTC_12x12_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR:
- case Dali::Pixel::COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR:
- {
- DALI_LOG_ERROR("Pixel formats for compressed images are not compatible with simple masking-out of per-pixel alpha.\n");
- byteOffset=0;
- bitMask=0;
- break;
- }
- case Dali::Pixel::RGB16F:
- case Dali::Pixel::RGB32F:
- {
- DALI_LOG_ERROR("Pixel format not compatible.\n");
- byteOffset=0;
- bitMask=0;
- break;
- }
- }
-}
-
-Uint16Pair ParseRange( unsigned int& index, unsigned int width, unsigned char*& pixel, unsigned int pixelStride, int testByte, int testBits, int testValue )
-{
- unsigned int start = 0xFFFF;
- for( ; index < width; ++index, pixel += pixelStride )
- {
- if( ( pixel[ testByte ] & testBits ) == testValue )
- {
- start = index;
- ++index;
- pixel += pixelStride;
- break;
- }
- }
-
- unsigned int end = width;
- for( ; index < width; ++index, pixel += pixelStride )
- {
- if( ( pixel[ testByte ] & testBits ) != testValue )
- {
- end = index;
- ++index;
- pixel += pixelStride;
- break;
- }
- }
-
- return Uint16Pair( start, end );
-}
-
-void ParseBorders( Devel::PixelBuffer& pixelBuffer, NPatchLoader::Data* data )
-{
- data->stretchPixelsX.Clear();
- data->stretchPixelsY.Clear();
-
- Pixel::Format pixelFormat = pixelBuffer.GetPixelFormat();
-
- int alphaByte = 0;
- int alphaBits = 0;
- Pixel::GetAlphaOffsetAndMask( pixelFormat, alphaByte, alphaBits );
-
- int testByte = alphaByte;
- int testBits = alphaBits;
- int testValue = alphaBits; // Opaque == stretch
- if( !alphaBits )
- {
- GetRedOffsetAndMask( pixelFormat, testByte, testBits );
- testValue = 0; // Black == stretch
- }
-
- unsigned int bytesPerPixel = Pixel::GetBytesPerPixel( pixelFormat );
- unsigned int width = pixelBuffer.GetWidth();
- unsigned int height = pixelBuffer.GetHeight();
- unsigned char* srcPixels = pixelBuffer.GetBuffer();
- unsigned int srcStride = width * bytesPerPixel;
-
- // TOP
- unsigned char* top = srcPixels + bytesPerPixel;
- unsigned int index = 0;
-
- for( ; index < width - 2; )
- {
- Uint16Pair range = ParseRange( index, width - 2, top, bytesPerPixel, testByte, testBits, testValue );
- if( range.GetX() != 0xFFFF )
- {
- data->stretchPixelsX.PushBack( range );
- }
- }
-
- // LEFT
- unsigned char* left = srcPixels + srcStride;
- index = 0;
- for( ; index < height - 2; )
- {
- Uint16Pair range = ParseRange( index, height - 2, left, srcStride, testByte, testBits, testValue );
- if( range.GetX() != 0xFFFF )
- {
- data->stretchPixelsY.PushBack( range );
- }
- }
-
- // If there are no stretch pixels then make the entire image stretchable
- if( data->stretchPixelsX.Size() == 0 )
- {
- data->stretchPixelsX.PushBack( Uint16Pair( 0, width - 2 ) );
- }
- if( data->stretchPixelsY.Size() == 0 )
- {
- data->stretchPixelsY.PushBack( Uint16Pair( 0, height - 2 ) );
- }
-}
-