text stringlengths 0 234 |
|---|
end loop; |
-- Load the image descriptor |
Read_Intel(image.buffer, Descriptor.ImageLeft); |
Read_Intel(image.buffer, Descriptor.ImageTop); |
Read_Intel(image.buffer, Descriptor.ImageWidth); |
Read_Intel(image.buffer, Descriptor.ImageHeight); |
Get_Byte(image.buffer, Descriptor.Depth); |
Raw_Byte(Descriptor.Depth); |
-- Get image corner coordinates |
tlX := Natural(Descriptor.ImageLeft); |
tlY := Natural(Descriptor.ImageTop); |
brX := tlX + Natural(Descriptor.ImageWidth); |
brY := tlY + Natural(Descriptor.ImageHeight); |
-- Local Color Table Flag 1 Bit |
-- Interlace Flag 1 Bit |
-- Sort Flag 1 Bit |
-- Reserved 2 Bits |
-- Size of Local Color Table 3 Bits |
-- |
frame_interlaced:= (Descriptor.Depth and 64) = 64; |
local_palette:= (Descriptor.Depth and 128) = 128; |
local.format:= GIF; |
local.stream:= image.stream; |
local.buffer:= image.buffer; |
if local_palette then |
-- Get amount of colours in image |
BitsPerPixel := 1 + Natural(Descriptor.Depth and 7); |
new_num_of_colours:= 2 ** BitsPerPixel; |
-- 21. Local Color Table |
local.palette:= new Color_table(0..new_num_of_colours-1); |
Color_tables.Load_palette(local); |
image.buffer:= local.buffer; |
elsif image.palette = null then |
Raise_Exception( |
error_in_image_data'Identity, |
"GIF: neither local, nor global palette" |
); |
else |
-- Use global palette |
new_num_of_colours:= 2 ** image.subformat_id; |
-- usually <= 2** image.bits_per_pixel |
-- Just copy main palette |
local.palette:= new Color_table'(image.palette.all); |
end if; |
pixel_mask:= U32(new_num_of_colours - 1); |
if full_trace then |
Ada.Text_IO.Put_Line( |
" - Image, interlaced: " & Boolean'Image(frame_interlaced) & |
"; local palette: " & Boolean'Image(local_palette) & |
"; transparency: " & Boolean'Image(frame_transparency) & |
"; transparency index:" & Color_type'Image(Transp_color) |
); |
end if; |
-- Get initial code size |
Get_Byte(image.buffer, temp ); |
Raw_Byte(temp); |
if Natural(temp) not in Code_size_range then |
Raise_Exception( |
error_in_image_data'Identity, |
"GIF: wrong LZW code size (must be in 2..12), is" & |
U8'Image(temp) |
); |
end if; |
CurrSize := Natural(temp); |
-- Start at top left of image |
X := Natural(Descriptor.ImageLeft); |
Y := Natural(Descriptor.ImageTop); |
Set_X_Y(X, image.height - Y - 1); |
-- |
if new_num_of_colours < 256 then |
-- "Rare" formats -> no need of best speed |
declare |
-- We create an instance with dynamic parameters |
procedure GIF_Decode_general is |
new GIF_Decode(frame_interlaced, frame_transparency, pixel_mask); |
begin |
GIF_Decode_general; |
Function Definition: procedure Register_Tests (T : in out TC) is |
Function Body: use AUnit.Test_Cases.Registration; |
begin |
Register_Routine |
(T, Test_One_String'Access, "One string"); |
Register_Routine |
(T, Test_Two_Strings'Access, "Two strings"); |
end Register_Tests; |
procedure Set_Up (T : in out TC) is |
begin |
T.P.Create (128); |
end Set_Up; |
function Name (T : TC) return Message_String is |
pragma Unreferenced (T); |
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