95 lines
2.5 KiB
Go
95 lines
2.5 KiB
Go
package screen
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import (
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"fmt"
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"strings"
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)
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// RenderTextModeAnsi returns the text mode contents using ANSI escape codes for reverse and flash
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func RenderTextModeAnsi(vs VideoSource, is80Columns bool, isSecondPage bool, isAltText bool, isApple2e bool) string {
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//func DumpTextModeAnsi(a *Apple2) string {
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// is80Columns := a.io.isSoftSwitchActive(ioFlag80Col)
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// isSecondPage := a.io.isSoftSwitchActive(ioFlagSecondPage) && !a.mmu.store80Active
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// isAltText := a.isApple2e && a.io.isSoftSwitchActive(ioFlagAltChar)
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var text []uint8
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if is80Columns {
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text = getText80FromMemory(vs, isSecondPage)
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} else {
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text = getTextFromMemory(vs, isSecondPage, false)
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}
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columns := len(text) / textLines
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content := "\n"
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content += fmt.Sprintln(strings.Repeat("#", columns+4))
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for l := 0; l < textLines; l++ {
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line := ""
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for c := 0; c < columns; c++ {
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char := text[l*columns+c]
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line += textMemoryByteToString(char, isAltText, isApple2e, true)
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}
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content += fmt.Sprintf("# %v #\n", line)
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}
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content += fmt.Sprintln(strings.Repeat("#", columns+4))
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return content
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}
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/*
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See Apple IIe reference manual. Table 2-5
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---------Ascii----II+------IIe------AltChar--AltCEnh
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$00-$1f Control Upp Inv Upp Inv Upp Inv Upp Inv
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$20-$3f Symbols Sym Inv Sym Inv Sym Inv Upp Inv
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$40-$5f UpperCa Upp Fla Upp Fla Upp Inv Mouse
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$60-$7f LowerCa Sym Fla Sym Fla Low Inv Low Inv
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$80-$9f Upp Nor Upp Nor Upp Nor Upp Nor
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$a0-$bf Sym Nor Sym Nor Sym Nor Sym Nor
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$c0-$df Upp Nor Upp Nor Upp Nor Upp Nor
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$e0-$ff Low Nor Low Nor Low Nor Low Nor
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----------------------------------------------------
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*/
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func textMemoryByteToString(value uint8, isAltCharSet bool, isApple2e bool, ansi bool) string {
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// Normal, inverse or flash
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topBits := value >> 6
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isInverse := topBits == 0
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isFlash := topBits == 1
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if isFlash && isAltCharSet {
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isFlash = false
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isInverse = true
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}
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// Move blocks
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value = value & 0x7f
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if !isApple2e {
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// No uppercase
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value = value & 0x3f
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}
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if isFlash || isInverse && !isAltCharSet {
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// No flash or inverse lowercase
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value = value & 0x3f
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}
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if value < 0x20 {
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// Control is Uppercase
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value += 0x40
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}
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// Render
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if value == 0x7f {
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// DEL is full box
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value = '_'
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}
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if ansi && isFlash {
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if value == ' ' {
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// Flashing space in Apple is the full box. It can't be done with ANSI codes
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value = '_'
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}
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return fmt.Sprintf("\033[5m%v\033[0m", string(value))
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} else if ansi && isInverse {
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return fmt.Sprintf("\033[7m%v\033[0m", string(value))
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} else {
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return string(value)
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}
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}
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