libimg: encode API; pnm (pbm, pgm, ppm) encoding in raw mode
git-svn-id: svn://kolibrios.org@2684 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
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@ -28,6 +28,7 @@ include '../../../../macros.inc'
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purge section,mov,add,sub
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include 'libimg.inc'
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;include '../../../../system/board/trunk/debug.inc'
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section '.flat' code readable align 16
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@ -85,7 +86,7 @@ proc img.is_img _data, _length ;////////////////////////////////////////////////
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;< --- TBD --- ;;
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;;================================================================================================;;
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push ebx
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mov ebx, img._.formats_table
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mov ebx, img.formats_table
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@@: stdcall [ebx + FormatsTableEntry.Is], [_data], [_length]
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or eax, eax
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jnz @f
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@ -152,11 +153,12 @@ endp
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;;================================================================================================;;
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proc img.to_rgb2 _img, _out ;/////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;? decodes image data into RGB triplets and stores them where [_out] points to ;;
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;;------------------------------------------------------------------------------------------------;;
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;> --- TBD --- ;;
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;> [_img] = pointer to source image ;;
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;> [_out] = where to store RGB triplets ;;
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;;------------------------------------------------------------------------------------------------;;
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;< --- TBD --- ;;
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;< none ;;
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;;================================================================================================;;
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push esi edi
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mov esi, [_img]
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@ -173,9 +175,9 @@ endp
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;;================================================================================================;;
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proc img.to_rgb _img ;////////////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;? decodes image data into RGB triplets and returns pointer to memory area containing them ;;
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;;------------------------------------------------------------------------------------------------;;
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;> --- TBD --- ;;
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;> [_img] = pointer to source image ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 / pointer to rgb_data (array of [rgb] triplets) ;;
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;;================================================================================================;;
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@ -213,11 +215,12 @@ endp
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;;================================================================================================;;
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proc img._.do_rgb ;///////////////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;? decodes [esi + Image.Data] data into RGB triplets and stores them at [edi] ;;
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;;------------------------------------------------------------------------------------------------;;
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;> --- TBD --- ;;
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;> esi = pointer to source image ;;
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;> edi = pointer to memory to store RGB triplets ;;
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;;------------------------------------------------------------------------------------------------;;
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;< --- TBD --- ;;
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;< none ;;
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;;================================================================================================;;
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mov ecx, [esi + Image.Width]
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imul ecx, [esi + Image.Height]
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@ -552,14 +555,16 @@ endp
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;;================================================================================================;;
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proc img.decode _data, _length, _options ;////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;? decodes loaded into memory graphic file ;;
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;;------------------------------------------------------------------------------------------------;;
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;> --- TBD --- ;;
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;> [_data] = pointer to file in memory ;;
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;> [_length] = size in bytes of memory area pointed to by [_data] ;;
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;> [_options] = 0 / pointer to the structure of additional options ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 / pointer to image ;;
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;;================================================================================================;;
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push ebx
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mov ebx, img._.formats_table
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mov ebx, img.formats_table
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@@: stdcall [ebx + FormatsTableEntry.Is], [_data], [_length]
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or eax, eax
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jnz @f
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@ -575,25 +580,103 @@ proc img.decode _data, _length, _options ;//////////////////////////////////////
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endp
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;;================================================================================================;;
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proc img.encode _img, _p_length, _options ;///////////////////////////////////////////////////////;;
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proc img.encode _img, _common, _specific ;////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;? encode image to some format ;;
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;;------------------------------------------------------------------------------------------------;;
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;> --- TBD --- ;;
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;> [_img] = pointer to input image ;;
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;> [_common] = some most important options ;;
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; 0x00 : byte : format id (defined in libimg.inc) ;;
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; 0x01 : byte : fast encoding (0) / best compression ratio (255) ;;
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; 0 : store uncompressed data (if supported both by the format and libimg) ;;
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; 1 - 255 : use compression, if supported ;;
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; this option may be ignored if any format specific options are defined ;;
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; i.e. the 0 here will be ignored if some compression algorithm is specified ;;
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; 0x02 : byte : flags (bitfield) ;;
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; 0x01 : return an error if format specific conditions cannot be met ;;
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; 0x02 : preserve current bit depth. means 8bpp/16bpp/24bpp and so on ;;
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; 0x04 : delete alpha channel, if any ;;
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; 0x08 : flush alpha channel with 0xff, if any; add it if none ;;
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; 0x03 : byte : reserved, must be 0 ;;
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;> [_specific] = 0 / pointer to the structure of format specific options ;;
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; see <format_name>.inc for description ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 / pointer to encoded data ;;
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;< [_p_length] = data length ;;
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;< ecx = error code / the size of encoded data ;;
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; 1 : out of memory ;;
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; 2 : format is not supported ;;
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; 3 : specific conditions cannot be satisfied ;;
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; 4 : bit depth cannot be preserved ;;
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;;================================================================================================;;
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mov ebx, [_img]
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movzx eax, byte[_common]
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dec eax
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imul eax, sizeof.FormatsTableEntry
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add eax, FormatsTableEntry.Capabilities
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add eax, img.formats_table
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mov eax, [eax]
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test eax, 1 ; is encoding to this format supported at all?
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jnz @f
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mov ecx, LIBIMG_ERROR_FORMAT
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jmp .error
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@@:
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mov ecx, [ebx + Image.Type]
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mov edx, 1
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shl edx, cl
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test eax, edx
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jnz .bit_depth_ok
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test byte[_common+2], LIBIMG_ENCODE_STRICT_BIT_DEPTH
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jz @f
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mov ecx, LIBIMG_ERROR_BIT_DEPTH
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jmp .error
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@@:
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mov edx, 1 SHL Image.bpp24
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test eax, edx
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jnz @f
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mov ecx, LIBIMG_ERROR_BIT_DEPTH
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jmp .error
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@@:
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stdcall img.create, [ebx + Image.Width], [ebx + Image.Height], Image.bpp24
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test eax, eax
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jnz @f
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mov ecx, LIBIMG_ERROR_OUT_OF_MEMORY
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jmp .error
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@@:
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push eax
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stdcall img.to_rgb2, ebx, [eax + Image.Data]
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pop ebx
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.bit_depth_ok:
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movzx eax, byte[_common]
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dec eax
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imul eax, sizeof.FormatsTableEntry
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add eax, FormatsTableEntry.Encode
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add eax, img.formats_table
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mov eax, [eax]
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stdcall eax, [_img], [_common], [_specific]
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push eax ecx
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cmp ebx, [_img]
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je @f
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stdcall img.destroy, ebx
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@@:
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pop ecx eax
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jmp .quit
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.error:
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xor eax, eax
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.quit:
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ret
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endp
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;;================================================================================================;;
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proc img.create _width, _height, _type ;//////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;? creates an Image structure and initializes some its fields ;;
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;;------------------------------------------------------------------------------------------------;;
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;> --- TBD --- ;;
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;> [_width] = width of an image in pixels ;;
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;> [_height] = height of an image in pixels ;;
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;> [_type] = one of the Image.bppN constants from libimg.inc ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 / pointer to image ;;
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;;================================================================================================;;
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@ -629,11 +712,12 @@ endp
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;;================================================================================================;;
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proc img.destroy.layer _img ;/////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;? frees memory occupied by an image and all the memory regions its fields point to ;;
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;? for image sequences deletes only one frame and fixes Previous/Next pointers ;;
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;;------------------------------------------------------------------------------------------------;;
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;> --- TBD --- ;;
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;> [_img] = pointer to image ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = false / true ;;
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;< eax = 0 (fail) / 1 (success) ;;
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;;================================================================================================;;
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mov eax, [_img]
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mov edx, [eax + Image.Previous]
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@ -655,11 +739,12 @@ endp
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;;================================================================================================;;
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proc img.destroy _img ;///////////////////////////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? --- TBD --- ;;
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;? frees memory occupied by an image and all the memory regions its fields point to ;;
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;? follows Previous/Next pointers and deletes all the images in sequence ;;
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;;------------------------------------------------------------------------------------------------;;
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;> --- TBD --- ;;
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;> [_img] = pointer to image ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = false / true ;;
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;< eax = 0 (fail) / 1 (success) ;;
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;;================================================================================================;;
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push 1
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mov eax, [_img]
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@ -1787,6 +1872,24 @@ proc img.draw _img, _x, _y, _width, _height, _xpos, _ypos ;/////////////////////
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ret
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endp
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align 4
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img.formats_table:
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.bmp dd LIBIMG_FORMAT_ID_BMP, img.is.bmp, img.decode.bmp, img.encode.bmp, 0
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.ico dd LIBIMG_FORMAT_ID_ICO, img.is.ico, img.decode.ico_cur, img.encode.ico, 0
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.cur dd LIBIMG_FORMAT_ID_CUR, img.is.cur, img.decode.ico_cur, img.encode.cur, 0
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.gif dd LIBIMG_FORMAT_ID_GIF, img.is.gif, img.decode.gif, img.encode.gif, 0
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.png dd LIBIMG_FORMAT_ID_PNG, img.is.png, img.decode.png, img.encode.png, 0
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.jpg dd LIBIMG_FORMAT_ID_JPEG, img.is.jpg, img.decode.jpg, img.encode.jpg, 0
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.tga dd LIBIMG_FORMAT_ID_TGA, img.is.tga, img.decode.tga, img.encode.tga, 0
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.pcx dd LIBIMG_FORMAT_ID_PCX, img.is.pcx, img.decode.pcx, img.encode.pcx, 0
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.xcf dd LIBIMG_FORMAT_ID_XCF, img.is.xcf, img.decode.xcf, img.encode.xcf, 0
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.tiff dd LIBIMG_FORMAT_ID_TIFF, img.is.tiff, img.decode.tiff, img.encode.tiff,0
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.pnm dd LIBIMG_FORMAT_ID_PNM, img.is.pnm, img.decode.pnm, img.encode.pnm, 1 + (1 SHL Image.bpp1) + (1 SHL Image.bpp8) + (1 SHL Image.bpp24)
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.wbmp dd LIBIMG_FORMAT_ID_WBMP, img.is.wbmp, img.decode.wbmp, img.encode.wbmp,0
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.z80 dd LIBIMG_FORMAT_ID_Z80, img.is.z80, img.decode.z80, img.encode.z80, 0 ;this must be the last entry as there are no signatures in z80 screens at all
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dd 0
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;;================================================================================================;;
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;;////////////////////////////////////////////////////////////////////////////////////////////////;;
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;;================================================================================================;;
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@ -1991,24 +2094,6 @@ img._.get_scanline_len: ;///////////////////////////////////////////////////////
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;;////////////////////////////////////////////////////////////////////////////////////////////////;;
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;;================================================================================================;;
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align 4
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img._.formats_table:
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.bmp dd img.is.bmp, img.decode.bmp, img.encode.bmp
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.ico dd img.is.ico, img.decode.ico_cur, img.encode.ico
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.cur dd img.is.cur, img.decode.ico_cur, img.encode.cur
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.gif dd img.is.gif, img.decode.gif, img.encode.gif
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.png dd img.is.png, img.decode.png, img.encode.png
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.jpg dd img.is.jpg, img.decode.jpg, img.encode.jpg
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.tga dd img.is.tga, img.decode.tga, img.encode.tga
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.pcx dd img.is.pcx, img.decode.pcx, img.encode.pcx
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.xcf dd img.is.xcf, img.decode.xcf, img.encode.xcf
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.tiff dd img.is.tiff, img.decode.tiff, img.encode.tiff
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.pnm dd img.is.pnm, img.decode.pnm, img.encode.pnm
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.wbmp dd img.is.wbmp, img.decode.wbmp, img.encode.wbmp
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.z80 dd img.is.z80, img.decode.z80, img.encode.z80 ;this must be the last entry as there are no
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;signatures in z80 screens at all
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dd 0
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align 4
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type2bpp dd 8, 24, 32, 15, 16, 1
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img._.do_rgb.handlers:
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@ -2061,7 +2146,8 @@ export \
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img.flip.layer , 'img_flip_layer' , \
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img.rotate , 'img_rotate' , \
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img.rotate.layer , 'img_rotate_layer' , \
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img.draw , 'img_draw'
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img.draw , 'img_draw' , \
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img.formats_table, 'img_formats_table'
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; import from deflate unpacker
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; is initialized only when PNG loading is requested
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@ -17,11 +17,40 @@
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;; ;;
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;;================================================================================================;;
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; list of format id's
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LIBIMG_FORMAT_ID_BMP = 1
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LIBIMG_FORMAT_ID_ICO = 2
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LIBIMG_FORMAT_ID_CUR = 3
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LIBIMG_FORMAT_ID_GIF = 4
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LIBIMG_FORMAT_ID_PNG = 5
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LIBIMG_FORMAT_ID_JPEG = 6
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LIBIMG_FORMAT_ID_TGA = 7
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LIBIMG_FORMAT_ID_PCX = 8
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LIBIMG_FORMAT_ID_XCF = 9
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LIBIMG_FORMAT_ID_TIFF = 10
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LIBIMG_FORMAT_ID_PNM = 11
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LIBIMG_FORMAT_ID_WBMP = 12
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LIBIMG_FORMAT_ID_Z80 = 13
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; error codes
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LIBIMG_ERROR_OUT_OF_MEMORY = 1
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LIBIMG_ERROR_FORMAT = 2
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LIBIMG_ERROR_CONDITIONS = 3
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LIBIMG_ERROR_BIT_DEPTH = 4
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LIBIMG_ERROR_ENCODER = 5
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; encode flags (byte 0x02 of _common option)
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LIBIMG_ENCODE_STRICT_SPECIFIC = 0x01
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LIBIMG_ENCODE_STRICT_BIT_DEPTH = 0x02
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LIBIMG_ENCODE_DELETE_ALPHA = 0x08
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LIBIMG_ENCODE_FLUSH_ALPHA = 0x10
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struct FormatsTableEntry
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Format_id dd ?
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Is dd ?
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Decode dd ?
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Encode dd ?
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Capabilities dd ?
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ends
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struct Image
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@ -182,16 +182,127 @@ endp
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;;================================================================================================;;
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proc img.encode.pnm _img, _p_length, _options ;///////////////////////////////////////////////////;;
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proc img.encode.pnm _img, _common, _specific ;////////////////////////////////////////////////////;;
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;;------------------------------------------------------------------------------------------------;;
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;? Encode image into raw data in pnm format ;;
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;;------------------------------------------------------------------------------------------------;;
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;> _img = pointer to image ;;
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;> [_img] = pointer to image ;;
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;> [_common] = format independent options ;;
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;> [_specific] = 0 / pointer to the structure of format specific options ;;
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;;------------------------------------------------------------------------------------------------;;
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;< eax = 0 (error) or pointer to encoded data ;;
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;< _p_length = encoded data length ;;
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;< eax = 0 / pointer to encoded data ;;
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;< ecx = error code / the size of encoded data ;;
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;;================================================================================================;;
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locals
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encoded_file rd 1
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encoded_file_size rd 1
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encoded_data_size rd 1
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endl
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push ebx
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mov ebx, [_img]
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mov eax, [ebx + Image.Type]
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cmp eax, Image.bpp1
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je .pbm
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cmp eax, Image.bpp8
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je .pgm
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cmp eax, Image.bpp24
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je .ppm
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mov ecx, LIBIMG_ERROR_BIT_DEPTH
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jmp .error
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.pbm:
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mov ecx, [ebx + Image.Width]
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add ecx, 7
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shr ecx, 3
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imul ecx, [ebx + Image.Height]
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mov [encoded_data_size], ecx
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add ecx, (2 + 1) + (2 + pnm._.creator_comment.size + 1) + (5 + 1 + 5 + 1) + (3 + 1)
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mov [encoded_file_size], ecx
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stdcall [mem.alloc], ecx
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mov [encoded_file], eax
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test eax, eax
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jnz @f
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mov ecx, LIBIMG_ERROR_OUT_OF_MEMORY
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jmp .error
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@@:
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mov edi, eax
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mov ax, 'P4'
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call pnm._.write_header
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mov esi, [ebx + Image.Data]
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mov ecx, [encoded_data_size]
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rep movsb
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mov eax, [encoded_file]
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mov ecx, [encoded_file_size]
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jmp .quit
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.pgm:
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mov ecx, [ebx + Image.Width]
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imul ecx, [ebx + Image.Height]
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mov [encoded_data_size], ecx
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add ecx, (2 + 1) + (2 + pnm._.creator_comment.size + 1) + (5 + 1 + 5 + 1) + (3 + 1)
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mov [encoded_file_size], ecx
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stdcall [mem.alloc], ecx
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mov [encoded_file], eax
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test eax, eax
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jnz @f
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mov ecx, LIBIMG_ERROR_OUT_OF_MEMORY
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jmp .error
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@@:
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mov edi, eax
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mov ax, 'P5'
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call pnm._.write_header
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mov dword[edi], '255 '
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add edi, 3
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mov byte[edi], 0x0A
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add edi, 1
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mov esi, [ebx + Image.Data]
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mov ecx, [encoded_data_size]
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rep movsb
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mov eax, [encoded_file]
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mov ecx, [encoded_file_size]
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jmp .quit
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.ppm:
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mov ecx, [ebx + Image.Width]
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imul ecx, [ebx + Image.Height]
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lea ecx, [ecx*3]
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mov [encoded_data_size], ecx
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add ecx, (2 + 1) + (2 + pnm._.creator_comment.size + 1) + (5 + 1 + 5 + 1) + (3 + 1)
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mov [encoded_file_size], ecx
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stdcall [mem.alloc], ecx
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mov [encoded_file], eax
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test eax, eax
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jnz @f
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mov ecx, LIBIMG_ERROR_OUT_OF_MEMORY
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jmp .error
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@@:
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mov edi, eax
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mov ax, 'P6'
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call pnm._.write_header
|
||||
mov dword[edi], '255 '
|
||||
add edi, 3
|
||||
mov byte[edi], 0x0A
|
||||
add edi, 1
|
||||
mov esi, [ebx + Image.Data]
|
||||
mov ecx, [ebx + Image.Width]
|
||||
imul ecx, [ebx + Image.Height]
|
||||
@@:
|
||||
lodsb
|
||||
mov byte[edi+2], al
|
||||
lodsb
|
||||
mov byte[edi+1], al
|
||||
movsb
|
||||
add edi, 2
|
||||
dec ecx
|
||||
jnz @b
|
||||
mov eax, [encoded_file]
|
||||
mov ecx, [encoded_file_size]
|
||||
jmp .quit
|
||||
|
||||
.error:
|
||||
xor eax, eax
|
||||
.quit:
|
||||
pop ebx
|
||||
ret
|
||||
endp
|
||||
|
||||
@ -220,6 +331,54 @@ proc pnm._.get_number
|
||||
ret
|
||||
endp
|
||||
|
||||
|
||||
proc pnm._.write_header
|
||||
stosw
|
||||
mov byte[edi], 0x0A
|
||||
add edi, 1
|
||||
mov word[edi], '# '
|
||||
add edi, 2
|
||||
mov esi, pnm._.creator_comment
|
||||
mov ecx, pnm._.creator_comment.size
|
||||
rep movsb
|
||||
mov byte[edi], 0x0A
|
||||
add edi, 1
|
||||
|
||||
push edi
|
||||
mov al, ' '
|
||||
mov ecx, (5 + 1 + 5)
|
||||
rep stosb
|
||||
pop edi
|
||||
push edi
|
||||
add edi, 4
|
||||
mov eax, [ebx + Image.Width]
|
||||
mov ecx, 10
|
||||
.write_width:
|
||||
xor edx, edx
|
||||
div cx
|
||||
add dl, '0'
|
||||
mov byte[edi], dl
|
||||
dec edi
|
||||
test ax, ax
|
||||
jnz .write_width
|
||||
mov eax, [ebx + Image.Height]
|
||||
pop edi
|
||||
push edi
|
||||
add edi, 10
|
||||
.write_height:
|
||||
xor edx, edx
|
||||
div cx
|
||||
add dl, '0'
|
||||
mov byte[edi], dl
|
||||
dec edi
|
||||
test ax, ax
|
||||
jnz .write_height
|
||||
pop edi
|
||||
add edi, 11
|
||||
mov byte[edi], 0x0A
|
||||
add edi, 1
|
||||
ret
|
||||
endp
|
||||
;;================================================================================================;;
|
||||
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
|
||||
;;================================================================================================;;
|
||||
@ -228,3 +387,5 @@ endp
|
||||
;;////////////////////////////////////////////////////////////////////////////////////////////////;;
|
||||
;;================================================================================================;;
|
||||
|
||||
sz pnm._.creator_comment ,'CREATOR: KolibriOS / libimg'
|
||||
|
||||
|
||||
@ -24,3 +24,7 @@ PNM_PBM = 0
|
||||
PNM_PGM = 1
|
||||
PNM_PPM = 2
|
||||
|
||||
struct Encode_PNM ; ignored so far. just an example
|
||||
Size dd ? ; the size of this structure
|
||||
Mode dd ? ; PNM_RAW or PNM_ASCII
|
||||
ends
|
||||
|
||||
Loading…
Reference in New Issue
Block a user