[bb] Curved Text (part 2) by Andy_A [ 1+ years ago ]

[BlitzBot]

Title : Curved Text (part 2)
Author : Andy_A
Posted : 1+ years ago

Description : This snippet runs as is, but you'll need the Curved Text routines (in part 1) to use the new functions with your own images and programs.

New Functions:
makeData() - save an image to a data text file that can be cut and pasted into your code

getImgData() - reads the image stored in data statements into memory for further processing

data2buffer() - reads the image stored in data statements and creates an image in a Blitz image buffer. You can rotate at 0, 90, 180, and 270 degrees when storing in a Blitz image buffer. Correct buffer dimensions are handled in the function. Now you can use just like any other image that you load from an external file (bmp, png, etc...).

dat2curv2buf() - reads the image stored in data statements, fits the image around a curve, and creates an image in a Blitz image buffer.

Simple usage example included.

Code :

Code (blitzbasic) Select Expand

;     Title: Blitz RLE Vector Data To Buffer Demo
;Programmer: Andy Amaya
;      Date: 2004.03.25
;   Version: 1.08-Added dat2curv2buf() function
;    Update: 1.07-Added data2buffer() function
;    Update: 1.06-Added makeData() and getImgData() functions
;    Update: 1.05-Lock & UnLock buffer to use ReadPixelFast (does NOT work in B2D)
;    Update: 1.04-Added constants to support use with 16 bit color cards
;    Update: 1.03-Added curveImg Routine
;    Update: 1.01-Added maskImg, replaceColor, maskAndReplace routines
;    Update: 1.00-Original RLE image routine

AppTitle "Blitz Run Length Encoded Vector Data To Image Buffer"

Global sw% = 800
Global sh% = 600
Global cd% = 32 ;<--------------- Color depth

Graphics sw, sh , cd, 2
SetBuffer BackBuffer()

Dim vecs(1) ;vector array (true dimension size in image data)
Dim pal%(1) ;Color palette array (true dimension size in image data)

;========== masking constants for 32 bit color =========
Global maskRed% = 16711680
Global maskGrn% = 65280
Global maskBlu% = 255
;=======================================================

;========= masking constants for 16 bit (5-6-5) ========
; Global maskRed% = 16252928
; Global maskGrn% = 64512 ;change to 63488 for (5-5-5)
; Global maskBlu% = 248
;=======================================================

Arial18b%  = LoadFont("Arial",18,True)

st = MilliSecs()
SetFont arial18b
Color 0, 128, 255
Rect 0, 0, sw-1, sh-1, True


;use "Data to Image Buffer" image data statements
Restore data2buf
;Get text image and store in gfxMsg0 image buffer
  gfxMsg0 = data2buffer(0)

;use "Data to Image Buffer" image data statements
Restore data2buf
;Get text image and store in gfxMsg90 image buffer
 gfxMsg90 = data2buffer(90)

;use "Data to Image Buffer" image data statements
Restore data2buf
;Get text image and store in gfxMsg180 image buffer
gfxMsg180 = data2buffer(180)

;use "Data to Image Buffer" image data statements
Restore data2buf
;Get text image and store in gfxMsg270 image buffer
gfxMsg270 = data2buffer(270)

;use "Data to Image Buffer" image data statements
Restore data2buf
;Get text image, make it curved  and store in gfxCurve image buffer
gfxCurve = dat2curv2buf(125, 115.0, 310.0, 3, 255, 0, 0)

;use yellow "gradient" image data statements
Restore gradient
;Get gradient image, flip to 180 degrees and store in gfxGrad image buffer
gfxGrad = data2buffer(180)



DrawBlock(  gfxMsg0, 227, 100)
DrawBlock( gfxMsg90, 227+305, 140)
DrawBlock(gfxMsg180, 227, 485)
DrawBlock(gfxMsg270, 227, 140)

DrawBlock(gfxGrad,267,140)

MaskImage gfxCurve, 255, 0, 0
DrawImage(gfxCurve, 400-125, 320-125)

et = MilliSecs() - st

Color 128,255,255

Text 0, 0, "To read in one text image from data statements four times at  0, 90, 180, and 270 degrees."
Text 0, 32, "Read in a gradient image from data statements."
Text 0, 16, "Read in the same text image from data statements one more time, and wrap around a curve."
Text 0, 48, "Store all six images in separate Blitz image buffers."
Text 0, 64, "And then to display all six newly created image buffers on the screen."
Text 0, 80, "Takes "+et+" milliseconds."

Text 0, 112, "(The text image was a 41K bmp,"
Text 0, 128, "it was reduced to a 9K text file."
Text 0, 160, "The gradient image was a 274K"
Text 0, 176, "bmp, it was reduced to a 5K"
Text 0, 192, "text file. )"





Text 10,570,"click to exit"


Flip
WaitMouse()

FreeFont Arial18b

FreeImage gfxMsg0
FreeImage gfxMsg90
FreeImage gfxMsg180
FreeImage gfxMsg270
FreeImage gfxGrad
FreeImage gfxCurve

.data2buf ;image data for "Data to Image Buffer" text on red background - 345x40
Data 345,40,3994,5
Data -65536,-32897,-1,-16449,-24673
Data 345,0,345,0,345,0,345,0,345,0,345,0,345,0,5,0,1,1,11,2,1,3,1,4,1,1,113,0,1,1,5,2,104,0,1,1,13,2,1,3,1,4,1,1,31,0,1,4,1,3,3,2,1,3,1,4,1,1,4,0,1,4,1,3,3,2,1,3,1,4,1,1,34,0,5,0,1,1,14,2,1,3,1,1,32,0
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Data 4,0,1,1,5,2,6,0,5,2,5,0,1,1,5,2,3,0,5,2,1,3,1,1,1,0,1,1,1,4,6,2,1,1,3,0,1,3,5,2,1,4,2,0,1,1,1,3,6,2,4,0,1,1,5,2,1,4,1,1,1,0,1,1,1,4,4,2,1,3,12,0,1,1,5,2,8,0,1,1,1,4,6,2,1,1,2,0,1,1,5,2,1,4,2,0,1,4
Data 7,2,4,0,1,1,5,2,6,0,1,1,5,2,6,0,1,1,5,2,1,4,1,1,1,0,1,1,1,4,4,2,1,3,2,0,1,1,5,2,12,0,1,0,1,1,18,2,1,3,5,0,1,3,15,2,5,0,9,2,1,0,1,3,15,2,15,0,9,2,3,0,1,3,14,2,1,4,13,0,1,1,4,2,1,3,4,0,1,1,4,2,1,3,5,0
Data 1,1,4,2,1,3,5,0,1,1,4,2,1,3,3,0,1,3,15,2,4,0,1,1,15,2,1,3,5,0,1,3,13,2,1,1,12,0,1,1,20,2,1,4,3,0,1,1,10,2,1,3,4,2,1,3,4,0,1,1,4,2,1,3,6,0,1,1,4,2,1,3,7,0,1,3,13,2,1,1,2,0,1,1,4,2,1,3,12,0,1,0,1,4
Data 17,2,1,4,6,0,1,1,15,2,5,0,8,2,1,3,1,0,1,1,15,2,15,0,8,2,1,3,4,0,13,2,1,4,14,0,1,4,4,2,1,4,4,0,1,4,4,2,1,4,5,0,1,4,4,2,1,4,5,0,1,4,4,2,1,4,3,0,1,1,15,2,5,0,1,3,14,2,1,4,6,0,1,3,11,2,1,1,13,0,1,4,19,2
Data 1,3,5,0,9,2,1,3,1,4,4,2,1,4,4,0,1,4,4,2,1,4,6,0,1,4,4,2,1,4,8,0,1,3,11,2,1,1,3,0,1,4,4,2,1,4,12,0,1,0,1,3,15,2,1,3,1,1,8,0,1,4,8,2,1,4,5,2,5,0,1,4,7,2,1,1,2,0,1,4,8,2,1,4,5,2,15,0,1,4,7,2,1,1,5,0
Data 1,3,10,2,1,1,15,0,1,3,4,2,1,4,4,0,1,3,4,2,1,1,5,0,1,3,4,2,1,4,5,0,1,3,4,2,1,4,4,0,1,4,8,2,1,4,5,2,6,0,1,3,7,2,1,4,1,3,4,2,1,1,7,0,1,3,8,2,1,3,1,1,14,0,1,3,18,2,1,4,6,0,1,4,7,2,1,4,1,0,1,3,4,2,1,1
Data 4,0,1,3,4,2,1,4,6,0,1,3,4,2,1,4,9,0,1,3,8,2,1,3,1,1,4,0,1,3,4,2,1,1,12,0,1,0,12,2,2,3,1,4,1,1,11,0,1,1,1,3,3,2,1,3,1,4,1,1,1,0,5,2,1,1,5,0,1,1,1,3,4,2,1,3,4,0,1,1,1,3,3,2,1,3,1,4,1,1,1,0,5,2,1,1,15,0
Data 1,1,1,3,4,2,1,3,7,0,1,1,1,4,1,3,3,2,2,3,1,4,17,0,5,2,1,1,4,0,5,2,1,1,5,0,5,2,1,1,5,0,5,2,1,1,5,0,1,1,1,3,3,2,1,3,1,4,1,1,1,0,5,2,1,1,6,0,1,4,1,3,3,2,1,3,1,1,1,0,5,2,9,0,1,1,1,3,4,2,1,3,1,4,16,0,15,2
Data 1,3,1,4,1,1,9,0,1,1,1,3,3,2,1,3,1,1,2,0,5,2,5,0,5,2,1,1,6,0,5,2,1,1,10,0,1,1,1,3,4,2,1,3,1,4,6,0,5,2,1,1,12,0,200,0,1,1,4,2,1,3,139,0,189,0,1,2,3,3,1,4,6,0,1,3,4,2,1,4,139,0,189,0,5,2,1,4,1,1,2,0
Data 1,1,1,4,5,2,1,1,139,0,189,0,1,3,14,2,1,3,140,0,189,0,1,1,14,2,1,1,140,0,190,0,1,4,11,2,1,3,1,1,141,0,192,0,1,4,1,3,5,2,2,3,1,1,143,0,345,0

.gradient ;image data for black to yellow gradient - 265x345
Data 265,345,690,255
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Data -3026688,-3092480,-3158272,-3224064,-3289856,-3355648,-3421440,-3487232,-3553024,-3618816,-3684608,-3750400,-3816192,-3881984,-3947776,-4013568,-4079360,-4145152,-4210944,-4276736,-4342528,-4408320
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Data -8816384,-8882176,-8947968,-9013760,-9079552,-9145344,-9211136,-9276928,-9342720,-9408512,-9474304,-9540096,-9605888,-9671680,-9737472,-9803264,-9869056,-9934848,-10000640,-10066432,-10132224,-10198016
Data -10263808,-10329600,-10395392,-10461184,-10526976,-10592768,-10658560,-10724352,-10790144,-10855936,-10921728,-10987520,-11053312,-11119104,-11184896,-11250688,-11316480,-11382272,-11448064,-11513856
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Data -12895488,-12961280,-13027072,-13092864,-13158656,-13224448,-13290240,-13356032,-13421824,-13487616,-13553408,-13619200,-13684992,-13750784,-13816576,-13882368,-13948160,-14013952,-14079744,-14145536
Data -14211328,-14277120,-14342912,-14408704,-14474496,-14540288,-14606080,-14671872,-14737664,-14803456,-14869248,-14935040,-15000832,-15066624,-15132416,-15198208,-15264000,-15329792,-15395584,-15461376
Data -15527168,-15592960,-15658752,-15724544,-15790336,-15856128,-15921920,-15987712,-16053504,-16119296,-16185088,-16250880,-16316672,-16382464,-16448256,-16514048,-16579840,-16645632,-16711424
Data 265,0,265,1,265,1,265,2,265,3,265,4,265,4,265,5,265,6,265,7,265,7,265,8,265,9,265,10,265,10,265,11,265,12,265,13,265,13,265,14,265,15,265,16,265,16,265,17,265,18,265,18,265,19,265,20,265,21,265,21
Data 265,22,265,23,265,24,265,24,265,25,265,26,265,27,265,27,265,28,265,29,265,30,265,30,265,31,265,32,265,32,265,33,265,34,265,35,265,35,265,36,265,37,265,38,265,38,265,39,265,40,265,41,265,41,265,42
Data 265,43,265,44,265,44,265,45,265,46,265,47,265,47,265,48,265,49,265,49,265,50,265,51,265,52,265,52,265,53,265,54,265,55,265,55,265,56,265,57,265,58,265,58,265,59,265,60,265,61,265,61,265,62,265,63
Data 265,63,265,64,265,65,265,66,265,66,265,67,265,68,265,69,265,69,265,70,265,71,265,72,265,72,265,73,265,74,265,75,265,75,265,76,265,77,265,78,265,78,265,79,265,80,265,80,265,81,265,82,265,83,265,83
Data 265,84,265,85,265,86,265,86,265,87,265,88,265,89,265,89,265,90,265,91,265,92,265,92,265,93,265,94,265,94,265,95,265,96,265,97,265,97,265,98,265,99,265,100,265,100,265,101,265,102,265,103,265,103,265,104
Data 265,105,265,106,265,106,265,107,265,108,265,109,265,109,265,110,265,111,265,111,265,112,265,113,265,114,265,114,265,115,265,116,265,117,265,117,265,118,265,119,265,120,265,120,265,121,265,122,265,123
Data 265,123,265,124,265,125,265,125,265,126,265,127,265,128,265,128,265,129,265,130,265,131,265,131,265,132,265,133,265,134,265,134,265,135,265,136,265,137,265,137,265,138,265,139,265,140,265,140,265,141
Data 265,142,265,142,265,143,265,144,265,145,265,145,265,146,265,147,265,148,265,148,265,149,265,150,265,151,265,151,265,152,265,153,265,154,265,154,265,155,265,156,265,156,265,157,265,158,265,159,265,159
Data 265,160,265,161,265,162,265,162,265,163,265,164,265,165,265,165,265,166,265,167,265,168,265,168,265,169,265,170,265,171,265,171,265,172,265,173,265,173,265,174,265,175,265,176,265,176,265,177,265,178
Data 265,179,265,179,265,180,265,181,265,182,265,182,265,183,265,184,265,185,265,185,265,186,265,187,265,187,265,188,265,189,265,190,265,190,265,191,265,192,265,193,265,193,265,194,265,195,265,196,265,196
Data 265,197,265,198,265,199,265,199,265,200,265,201,265,202,265,202,265,203,265,204,265,204,265,205,265,206,265,207,265,207,265,208,265,209,265,210,265,210,265,211,265,212,265,213,265,213,265,214,265,215
Data 265,216,265,216,265,217,265,218,265,218,265,219,265,220,265,221,265,221,265,222,265,223,265,224,265,224,265,225,265,226,265,227,265,227,265,228,265,229,265,230,265,230,265,231,265,232,265,233,265,233
Data 265,234,265,235,265,235,265,236,265,237,265,238,265,238,265,239,265,240,265,241,265,241,265,242,265,243,265,244,265,244,265,245,265,246,265,247,265,247,265,248,265,249,265,249,265,250,265,251,265,252
Data 265,252,265,253,265,254

End

Function makeData(dataFile$, imgWidth%, imgHeight%)
;=======================================================
;approximate length of characters per data statement for
;palette data and image data
;longer data lines take up less room overall
dataLen%  = 200
;=======================================================
vCount%   = 0
pal(0)    = vecs(1)
clrCount% = 1
idx%      = 0
    For i% = 1 To imgHeight
lineLen% = 0
        While lineLen < imgWidth
vLen% = vecs(vCount)
vClr% = vecs(vCount + 1)
lineLen = lineLen + vLen
;build the list of palette colors in the pal() array
colorExists% = 0
For j% = 1 To clrCount
;if the current color already exists
;don't look any further, exit the loop
If pal(j-1) = vClr Then
   colorExists = 1
Exit
End If
Next
;if we didn't find an existing color then add to pal() array then
;increment the number of colors in the image and add to pal() array
If colorExists = 0 Then
idx = idx + 1
clrCount = clrCount + 1
pal(idx) = vClr
End If
colorExists = 0
;increment the vector counter
            vCount = vCount+2
        Wend
    Next
    hiCount% = vCount ; + 2 ;extra two elements, just in case ;)
fileOut% = WriteFile(dataFile$)
    ;Save the width and height of the image followed by largest number of
;vectors in a raster line in the image and the number of unique
;colors to dimension vec() array and pal() array in main program
dat$ = "Data "+Str(imgWidth)+","+Str(imgHeight)+","+Str(hiCount)+","+Str(clrCount)
    WriteLine(fileOut, dat$)
;Now write the palette table into the text data file
dat$ = "Data "
For idx = 0 To clrCount-1
dat$ = dat$ + Str(pal(idx))+","
If Len(dat$) > dataLen Then
dat$= Left$(dat$,Len(dat$)-1)
WriteLine(fileOut, dat$)
dat$ = "Data "
End If
Next
If Right$(dat$,1) = "," Then
dat$ = Left$(dat$, Len(dat$)-1)
   WriteLine(fileOut, dat$)
Else
If dat$ <> "Data " Then WriteLine(fileOut, dat$)
End If

;All set to go, let's start writing data to disk!
    dat$ = "Data "
vCount = 0
For i = 1 To imgHeight
lineLen = 0
While lineLen < imgWidth
lineLen = lineLen + vecs(vCount)
For j% = 0 To clrCount-1
If vecs(vCount + 1) = pal(j) Then
idx = j
Exit
End If
Next
dat$ = dat$ + Str(vecs(vCount))+","+Str(idx)+","
If Len(dat$) > dataLen Then
dat$ = Left$(dat$,Len(dat$)-1)
WriteLine(fileOut, dat$)
dat$ = "Data "
End If
vCount = vCount + 2
Wend
    Next
If dat$ <> "Data " Then
If Right$(dat$,1) = "," Then
dat$ = Left$(dat$,Len(dat$)-1)
   WriteLine(fileOut, dat$)
Else
   WriteLine(fileOut, dat$)
End If
End If
    CloseFile fileOut
End Function

Function getImgData%()
    Read imgWidth
    Read imgHeight
Read numVecs
Read palSize
    Dim vecs(numVecs)
Dim pal(palSize-1)
For i = 0 To palSize-1
Read pal(i)
Next
ras = 1
lineLen = 0
vCount = 0
While ras <= imgHeight
Read vecLen
Read idx
vecs(vCount) = vecLen
vecs(vCount+1) = pal(idx)
lineLen = lineLen + vecLen
vCount = vCount + 2
If lineLen >= imgWidth Then
lineLen = 0
ras = ras + 1
End If
Wend
End Function

Function data2buffer%(displayAngle%)
If displayAngle = 0 Or displayAngle = 90 Or displayAngle = 180 Or displayAngle = 270 Then
Read imgWidth%
   Read imgHeight%
Read numVecs%
Read palSize%
   Dim vecs(numVecs)
Dim pal(palSize-1)
For i% = 0 To palSize-1
Read pal(i)
Next
ras% = 1
vCount% = 0
lineLen% = 0
While ras <= imgHeight
Read vecLen%
Read idx%
vecs(vCount) = vecLen
vecs(vCount+1) = pal(idx)
lineLen = lineLen + vecLen
If lineLen = imgWidth Then
lineLen = 0
ras = ras + 1
End If
vCount = vCount + 2
Wend
Select displayAngle
Case   0
newWidth%  = imgWidth
newHeight% = imgHeight
x% = 0
y% = 0
Case  90
newWidth%  = imgHeight
newHeight% = imgWidth
x% = newWidth-1
y% = 0
Case 180
newWidth%  = imgWidth
newHeight% = imgHeight
x% = imgWidth-1
y% = imgHeight-1
Case 270
newWidth%  = imgHeight
newHeight% = imgWidth
x% = 0
y% = newHeight-1
End Select
imgTemp% = CreateImage(newWidth, newHeight)
SetBuffer ImageBuffer(imgTemp)
        angle2% = displayAngle + 90
vCount = 0
        For i = 1 To imgHeight
            p# = Cos(angle2)*(i-1)+x
            q# = Sin(angle2)*(i-1)+y
lineLen = 0
            While lineLen < imgWidth
   vecLen% = vecs(vCount)
lineLen = lineLen + vecLen
           red = (vecs(vCount + 1) And maskRed) Shr 16
          grn = (vecs(vCount + 1) And maskGrn) Shr 8
           blu =  vecs(vCount + 1) And maskBlu
                Color red,grn,blu
   r# = Cos(displayAngle)*vecLen+p
   s# = Sin(displayAngle)*vecLen+q
   Line p,q,r,s
                vCount = vCount+2
   p=r
   q=s
            Wend
        Next
   SetBuffer BackBuffer()
Return imgTemp
Else
Return 0
End If
End Function

Function dat2curv2buf(radius%, startAngle#, arcSegment#, penSize%, bkR%, bkG%, bkB%)
Read imgWidth%
    Read imgHeight%
Read numVecs%
Read palSize%
    Dim vecs(numVecs)
Dim pal(palSize-1)
For i% = 0 To palSize-1
Read pal(i)
Next
ras% = 1
vCount% = 0
lineLen% = 0
While ras <= imgHeight
Read vecLen%
Read idx%
vecs(vCount) = vecLen
vecs(vCount+1) = pal(idx)
lineLen = lineLen + vecLen
If lineLen = imgWidth Then
lineLen = 0
ras = ras + 1
End If
vCount = vCount + 2
Wend
;Create a Blitz image buffer
diameter% = radius Shl 1
imgTemp% = CreateImage(diameter%, diameter%)
SetBuffer ImageBuffer(imgTemp)
;Fill the background with desired color
Color bkR, bkG, bkB
Rect(0,0,diameter, diameter, True)
;Start drawing the curved image on the image buffer
If penSize > 1 Then
penOffset# = penSize Shr 1
End If
stepSize# = arcSegment/imgWidth
vCount = 0
centerX% = radius
centerY% = radius
For i% = 1 To imgHeight
lineLen = 0
arc# = startAngle
While lineLen < imgWidth
arcLen = vecs(vCount)
lineLen = lineLen + arcLen
red = (vecs(vCount + 1) And maskRed) Shr 16
grn = (vecs(vCount + 1) And maskGrn) Shr 8
blu =  vecs(vCount + 1) And maskBlu
Color red, grn, blu
arcInc# = arcLen*stepSize
c# = arc#
While c <= arc+arcInc
x = Cos(c)*radius+centerX
y = Sin(c)*radius+centerY
If penSize > 1 Then
Rect x-penOffset, y-penOffset, penSize, penSize, True
Else
Plot x,y
End If
c = c+stepSize
Wend
arc = arc+arcInc
vCount = vCount+2
Wend
radius = radius - 1
Next
SetBuffer BackBuffer()
Return imgTemp
End Function

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