mirror of
https://github.com/taigrr/gopher-os
synced 2025-01-18 04:43:13 -08:00
Rename Ega console to VgaTextConsole and implement the updated interface
This commit is contained in:
Achilleas Anagnostopoulos
parent
b72725742a
commit
286b8d9c71
@ -7,8 +7,8 @@ type ScrollDir uint8
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// The supported list of scroll directions for the console Scroll() calls.
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const (
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Up ScrollDir = iota
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Down
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ScrollDirUp ScrollDir = iota
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ScrollDirDown
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)
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// The Device interface is implemented by objects that can function as system
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198
src/gopheros/device/video/console/vga_text.go
Normal file
198
src/gopheros/device/video/console/vga_text.go
Normal file
@ -0,0 +1,198 @@
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package console
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import (
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"gopheros/kernel"
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"gopheros/kernel/cpu"
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"image/color"
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"reflect"
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"unsafe"
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)
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var portWriteByteFn = cpu.PortWriteByte
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// VgaTextConsole implements an EGA-compatible 80x25 text console using VGA
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// mode 0x3. The console supports the default 16 EGA colors which can be
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// overridden using the SetPaletteColor method.
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//
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// Each character in the console framebuffer is represented using two bytes,
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// a byte for the character ASCII code and a byte that encodes the foreground
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// and background colors (4 bits for each).
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//
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// The default settings for the console are:
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// - light gray text (color 7) on black background (color 0).
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// - space as the clear character
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type VgaTextConsole struct {
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width uint16
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height uint16
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fb []uint16
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palette color.Palette
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defaultFg uint8
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defaultBg uint8
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clearChar uint16
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}
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// NewVgaTextConsole creates an new vga text console with its
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// framebuffer mapped to fbPhysAddr.
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func NewVgaTextConsole(columns, rows uint16, fbPhysAddr uintptr) *VgaTextConsole {
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return &VgaTextConsole{
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width: columns,
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height: rows,
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clearChar: uint16(' '),
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// overlay a 16bit slice over the fbPhysAddr
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fb: *(*[]uint16)(unsafe.Pointer(&reflect.SliceHeader{
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Len: 80 * 25,
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Cap: 80 * 25,
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Data: fbPhysAddr,
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})),
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palette: color.Palette{
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color.RGBA{R: 0, G: 0, B: 1}, /* black */
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color.RGBA{R: 0, G: 0, B: 128}, /* blue */
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color.RGBA{R: 0, G: 128, B: 1}, /* green */
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color.RGBA{R: 0, G: 128, B: 128}, /* cyan */
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color.RGBA{R: 128, G: 0, B: 1}, /* red */
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color.RGBA{R: 128, G: 0, B: 128}, /* magenta */
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color.RGBA{R: 64, G: 64, B: 1}, /* brown */
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color.RGBA{R: 128, G: 128, B: 128}, /* light gray */
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color.RGBA{R: 64, G: 64, B: 64}, /* dark gray */
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color.RGBA{R: 0, G: 0, B: 255}, /* light blue */
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color.RGBA{R: 0, G: 255, B: 1}, /* light green */
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color.RGBA{R: 0, G: 255, B: 255}, /* light cyan */
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color.RGBA{R: 255, G: 0, B: 1}, /* light red */
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color.RGBA{R: 255, G: 0, B: 255}, /* light magenta */
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color.RGBA{R: 255, G: 255, B: 1}, /* yellow */
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color.RGBA{R: 255, G: 255, B: 255}, /* white */
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},
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// light gray text on black background
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defaultFg: 7,
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defaultBg: 0,
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}
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}
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// Dimensions returns the console width and height in characters.
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func (cons *VgaTextConsole) Dimensions() (uint16, uint16) {
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return cons.width, cons.height
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}
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// DefaultColors returns the default foreground and background colors
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// used by this console.
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func (cons *VgaTextConsole) DefaultColors() (fg uint8, bg uint8) {
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return cons.defaultFg, cons.defaultBg
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}
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// Fill sets the contents of the specified rectangular region to the requested
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// color. Both x and y coordinates are 1-based.
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func (cons *VgaTextConsole) Fill(x, y, width, height uint16, fg, bg uint8) {
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var (
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clr = (((uint16(bg) << 4) | uint16(fg)) << 8) | cons.clearChar
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rowOffset, colOffset uint16
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)
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// clip rectangle
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if x == 0 {
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x = 1
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} else if x >= cons.width {
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x = cons.width
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}
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if y == 0 {
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y = 1
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} else if y >= cons.height {
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y = cons.height
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}
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if x+width > cons.width {
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width = cons.width - x
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}
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if y+height > cons.height {
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height = cons.height - y
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}
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rowOffset = ((y - 1) * cons.width) + (x - 1)
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for ; height > 0; height, rowOffset = height-1, rowOffset+cons.width {
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for colOffset = rowOffset; colOffset < rowOffset+width; colOffset++ {
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cons.fb[colOffset] = clr
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}
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}
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}
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// Scroll the console contents to the specified direction. The caller
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// is responsible for updating (e.g. clear or replace) the contents of
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// the region that was scrolled.
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func (cons *VgaTextConsole) Scroll(dir ScrollDir, lines uint16) {
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if lines == 0 || lines > cons.height {
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return
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}
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var i uint16
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offset := lines * cons.width
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switch dir {
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case ScrollDirUp:
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for ; i < (cons.height-lines)*cons.width; i++ {
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cons.fb[i] = cons.fb[i+offset]
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}
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case ScrollDirDown:
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for i = cons.height*cons.width - 1; i >= lines*cons.width; i-- {
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cons.fb[i] = cons.fb[i-offset]
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}
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}
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}
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// Write a char to the specified location. If fg or bg exceed the supported
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// colors for this console, they will be set to their default value. Both x and
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// y coordinates are 1-based
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func (cons *VgaTextConsole) Write(ch byte, fg, bg uint8, x, y uint16) {
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if x < 1 || x > cons.width || y < 1 || y > cons.height {
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return
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}
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maxColorIndex := uint8(len(cons.palette) - 1)
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if fg > maxColorIndex {
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fg = cons.defaultFg
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}
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if bg >= maxColorIndex {
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bg = cons.defaultBg
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}
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cons.fb[((y-1)*cons.width)+(x-1)] = (((uint16(bg) << 4) | uint16(fg)) << 8) | uint16(ch)
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}
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// Palette returns the active color palette for this console.
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func (cons *VgaTextConsole) Palette() color.Palette {
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return cons.palette
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}
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// SetPaletteColor updates the color definition for the specified
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// palette index. Passing a color index greated than the number of
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// supported colors should be a no-op.
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func (cons *VgaTextConsole) SetPaletteColor(index uint8, rgba color.RGBA) {
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if index >= uint8(len(cons.palette)) {
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return
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}
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cons.palette[index] = rgba
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// Load palette entry to the DAC. In this mode, colors are specified
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// using 6-bits for each component; the RGB values need to be converted
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// to the 0-63 range.
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portWriteByteFn(0x3c8, index)
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portWriteByteFn(0x3c9, rgba.R>>2)
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portWriteByteFn(0x3c9, rgba.G>>2)
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portWriteByteFn(0x3c9, rgba.B>>2)
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}
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// DriverName returns the name of this driver.
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func (cons *VgaTextConsole) DriverName() string {
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return "vga_text_console"
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}
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// DriverVersion returns the version of this driver.
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func (cons *VgaTextConsole) DriverVersion() (uint16, uint16, uint16) {
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return 0, 0, 1
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}
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// DriverInit initializes this driver.
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func (cons *VgaTextConsole) DriverInit() *kernel.Error { return nil }
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320
src/gopheros/device/video/console/vga_text_test.go
Normal file
320
src/gopheros/device/video/console/vga_text_test.go
Normal file
@ -0,0 +1,320 @@
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package console
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import (
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"gopheros/device"
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"gopheros/kernel/cpu"
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"image/color"
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"testing"
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"unsafe"
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)
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func TestVgaTextDimensions(t *testing.T) {
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cons := NewVgaTextConsole(80, 25, 0)
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if w, h := cons.Dimensions(); w != 80 || h != 25 {
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t.Fatalf("expected console dimensions to be 80x25; got %dx%d", w, h)
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}
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}
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func TestVgaTextDefaultColors(t *testing.T) {
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cons := NewVgaTextConsole(80, 25, 0)
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if fg, bg := cons.DefaultColors(); fg != 7 || bg != 0 {
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t.Fatalf("expected console default colors to be fg:7, bg:0; got fg:%d, bg: %d", fg, bg)
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}
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}
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func TestVgaTextFill(t *testing.T) {
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specs := []struct {
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// Input rect
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x, y, w, h uint16
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// Expected area to be cleared
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expX, expY, expW, expH uint16
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}{
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{
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0, 0, 500, 500,
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0, 0, 80, 25,
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},
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{
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10, 10, 11, 50,
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10, 10, 11, 15,
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},
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{
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10, 10, 110, 1,
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10, 10, 70, 1,
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},
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{
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70, 20, 20, 20,
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70, 20, 10, 5,
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},
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{
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90, 25, 20, 20,
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0, 0, 0, 0,
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},
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{
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12, 12, 5, 6,
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12, 12, 5, 6,
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},
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}
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fb := make([]uint16, 80*25)
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cons := NewVgaTextConsole(80, 25, uintptr(unsafe.Pointer(&fb[0])))
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cw, ch := cons.Dimensions()
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testPat := uint16(0xDEAD)
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clearPat := uint16(cons.clearChar)
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nextSpec:
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for specIndex, spec := range specs {
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// Fill FB with test pattern
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for i := 0; i < len(fb); i++ {
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fb[i] = testPat
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}
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cons.Fill(spec.x, spec.y, spec.w, spec.h, 0, 0)
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var x, y uint16
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for y = 1; y <= ch; y++ {
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for x = 1; x <= cw; x++ {
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fbVal := fb[((y-1)*cw)+(x-1)]
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if x < spec.expX || y < spec.expY || x >= spec.expX+spec.expW || y >= spec.expY+spec.expH {
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if fbVal != testPat {
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t.Errorf("[spec %d] expected char at (%d, %d) not to be cleared", specIndex, x, y)
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continue nextSpec
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}
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} else {
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if fbVal != clearPat {
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t.Errorf("[spec %d] expected char at (%d, %d) to be cleared", specIndex, x, y)
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continue nextSpec
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}
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}
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}
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}
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}
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}
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func TestVgaTextScroll(t *testing.T) {
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fb := make([]uint16, 80*25)
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cons := NewVgaTextConsole(80, 25, uintptr(unsafe.Pointer(&fb[0])))
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cw, ch := cons.Dimensions()
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t.Run("up", func(t *testing.T) {
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specs := []uint16{
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0,
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1,
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2,
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}
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nextSpec:
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for specIndex, lines := range specs {
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// Fill buffer with test pattern
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var x, y, index uint16
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for y = 0; y < ch; y++ {
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for x = 0; x < cw; x++ {
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fb[index] = (y << 8) | x
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index++
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}
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}
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cons.Scroll(ScrollDirUp, lines)
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// Check that rows 1 to (height - lines) have been scrolled up
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index = 0
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for y = 0; y < ch-lines; y++ {
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for x = 0; x < cw; x++ {
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expVal := ((y + lines) << 8) | x
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if fb[index] != expVal {
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t.Errorf("[spec %d] expected value at (%d, %d) to be %d; got %d", specIndex, x, y, expVal, fb[index])
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continue nextSpec
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}
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index++
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}
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}
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}
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})
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t.Run("down", func(t *testing.T) {
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specs := []uint16{
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0,
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1,
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2,
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}
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nextSpec:
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for specIndex, lines := range specs {
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// Fill buffer with test pattern
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var x, y, index uint16
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for y = 0; y < ch; y++ {
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for x = 0; x < cw; x++ {
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fb[index] = (y << 8) | x
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index++
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}
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}
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cons.Scroll(ScrollDirDown, lines)
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// Check that rows lines to height have been scrolled down
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index = lines * cw
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for y = lines; y < ch-lines; y++ {
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for x = 0; x < cw; x++ {
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expVal := ((y - lines) << 8) | x
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if fb[index] != expVal {
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t.Errorf("[spec %d] expected value at (%d, %d) to be %d; got %d", specIndex, x, y, expVal, fb[index])
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continue nextSpec
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}
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index++
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}
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}
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}
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})
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}
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func TestVgaTextWrite(t *testing.T) {
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fb := make([]uint16, 80*25)
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cons := NewVgaTextConsole(80, 25, uintptr(unsafe.Pointer(&fb[0])))
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defaultFg, defaultBg := cons.DefaultColors()
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t.Run("off-screen", func(t *testing.T) {
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specs := []struct {
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x, y uint16
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}{
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{81, 26},
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{90, 24},
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{79, 30},
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{100, 100},
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}
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nextSpec:
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for specIndex, spec := range specs {
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for i := 0; i < len(fb); i++ {
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fb[i] = 0
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}
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cons.Write('!', 1, 2, spec.x, spec.y)
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for i := 0; i < len(fb); i++ {
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if got := fb[i]; got != 0 {
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t.Errorf("[spec %d] expected Write() with off-screen coords to be a no-op", specIndex)
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continue nextSpec
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}
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}
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}
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})
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t.Run("success", func(t *testing.T) {
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for i := 0; i < len(fb); i++ {
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fb[i] = 0
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}
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fg := uint8(1)
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bg := uint8(2)
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expAttr := uint16((uint16(bg) << 4) | uint16(fg))
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cons.Write('!', fg, bg, 1, 1)
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expVal := (expAttr << 8) | uint16('!')
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if got := fb[0]; got != expVal {
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t.Errorf("expected call to Write() to set fb[0] to %d; got %d", expVal, got)
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}
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})
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t.Run("fg out of range", func(t *testing.T) {
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for i := 0; i < len(fb); i++ {
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fb[i] = 0
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}
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fg := uint8(128)
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bg := uint8(2)
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expAttr := uint16((uint16(bg) << 4) | uint16(defaultFg))
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cons.Write('!', fg, bg, 1, 1)
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expVal := (expAttr << 8) | uint16('!')
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if got := fb[0]; got != expVal {
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t.Errorf("expected call to Write() to set fb[0] to %d; got %d", expVal, got)
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}
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})
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t.Run("bg out of range", func(t *testing.T) {
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for i := 0; i < len(fb); i++ {
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fb[i] = 0
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}
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fg := uint8(8)
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bg := uint8(255)
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expAttr := uint16((uint16(defaultBg) << 4) | uint16(fg))
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cons.Write('!', fg, bg, 1, 1)
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expVal := (expAttr << 8) | uint16('!')
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if got := fb[0]; got != expVal {
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t.Errorf("expected call to Write() to set fb[0] to %d; got %d", expVal, got)
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}
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})
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}
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func TestVgaTextSetPaletteColor(t *testing.T) {
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defer func() {
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portWriteByteFn = cpu.PortWriteByte
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}()
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cons := NewVgaTextConsole(80, 25, 0)
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t.Run("success", func(t *testing.T) {
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expWrites := []struct {
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port uint16
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val uint8
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}{
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// Values will be normalized in the 0-31 range
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{0x3c8, 1},
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{0x3c9, 63},
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{0x3c9, 31},
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{0x3c9, 0},
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}
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writeCallCount := 0
|
||||
portWriteByteFn = func(port uint16, val uint8) {
|
||||
exp := expWrites[writeCallCount]
|
||||
if port != exp.port || val != exp.val {
|
||||
t.Errorf("[port write %d] expected port: 0x%x, val: %d; got port: 0x%x, val: %d", writeCallCount, exp.port, exp.val, port, val)
|
||||
}
|
||||
|
||||
writeCallCount++
|
||||
}
|
||||
|
||||
rgba := color.RGBA{R: 255, G: 127, B: 0}
|
||||
cons.SetPaletteColor(1, rgba)
|
||||
|
||||
if got := cons.Palette()[1]; got != rgba {
|
||||
t.Errorf("expected color at index 1 to be:\n%v\ngot:\n%v", rgba, got)
|
||||
}
|
||||
|
||||
if writeCallCount != len(expWrites) {
|
||||
t.Errorf("expected cpu.portWriteByty to be called %d times; got %d", len(expWrites), writeCallCount)
|
||||
}
|
||||
})
|
||||
|
||||
t.Run("color index out of range", func(t *testing.T) {
|
||||
portWriteByteFn = func(_ uint16, _ uint8) {
|
||||
t.Error("unexpected call to cpu.PortWriteByte")
|
||||
}
|
||||
|
||||
rgba := color.RGBA{R: 255, G: 127, B: 0}
|
||||
cons.SetPaletteColor(50, rgba)
|
||||
})
|
||||
}
|
||||
|
||||
func TestVgaTextDriverInterface(t *testing.T) {
|
||||
var dev device.Driver = NewVgaTextConsole(80, 25, 0)
|
||||
|
||||
if err := dev.DriverInit(); err != nil {
|
||||
t.Fatal(err)
|
||||
}
|
||||
|
||||
if dev.DriverName() == "" {
|
||||
t.Fatal("DriverName() returned an empty string")
|
||||
}
|
||||
|
||||
if major, minor, patch := dev.DriverVersion(); major+minor+patch == 0 {
|
||||
t.Fatal("DriverVersion() returned an invalid version number")
|
||||
}
|
||||
}
|
||||
@ -1,100 +0,0 @@
|
||||
package console
|
||||
|
||||
import (
|
||||
"reflect"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
const (
|
||||
clearColor = Black
|
||||
clearChar = byte(' ')
|
||||
)
|
||||
|
||||
// Ega implements an EGA-compatible text console. At the moment, it uses the
|
||||
// ega console physical address as its outpucons. After implementing a memory
|
||||
// allocator, each console will use its own framebuffer while the active console
|
||||
// will periodically sync its internal buffer with the physical screen buffer.
|
||||
type Ega struct {
|
||||
width uint16
|
||||
height uint16
|
||||
|
||||
fb []uint16
|
||||
}
|
||||
|
||||
// Init sets up the console.
|
||||
func (cons *Ega) Init(width, height uint16, fbPhysAddr uintptr) {
|
||||
cons.width = width
|
||||
cons.height = height
|
||||
|
||||
cons.fb = *(*[]uint16)(unsafe.Pointer(&reflect.SliceHeader{
|
||||
Len: int(cons.width * cons.height),
|
||||
Cap: int(cons.width * cons.height),
|
||||
Data: fbPhysAddr,
|
||||
}))
|
||||
}
|
||||
|
||||
// Clear clears the specified rectangular region
|
||||
func (cons *Ega) Clear(x, y, width, height uint16) {
|
||||
var (
|
||||
attr = uint16((clearColor << 4) | clearColor)
|
||||
clr = attr | uint16(clearChar)
|
||||
rowOffset, colOffset uint16
|
||||
)
|
||||
|
||||
// clip rectangle
|
||||
if x >= cons.width {
|
||||
x = cons.width
|
||||
}
|
||||
if y >= cons.height {
|
||||
y = cons.height
|
||||
}
|
||||
|
||||
if x+width > cons.width {
|
||||
width = cons.width - x
|
||||
}
|
||||
if y+height > cons.height {
|
||||
height = cons.height - y
|
||||
}
|
||||
|
||||
rowOffset = (y * cons.width) + x
|
||||
for ; height > 0; height, rowOffset = height-1, rowOffset+cons.width {
|
||||
for colOffset = rowOffset; colOffset < rowOffset+width; colOffset++ {
|
||||
cons.fb[colOffset] = clr
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Dimensions returns the console width and height in characters.
|
||||
func (cons *Ega) Dimensions() (uint16, uint16) {
|
||||
return cons.width, cons.height
|
||||
}
|
||||
|
||||
// Scroll a particular number of lines to the specified direction.
|
||||
func (cons *Ega) Scroll(dir ScrollDir, lines uint16) {
|
||||
if lines == 0 || lines > cons.height {
|
||||
return
|
||||
}
|
||||
|
||||
var i uint16
|
||||
offset := lines * cons.width
|
||||
|
||||
switch dir {
|
||||
case Up:
|
||||
for ; i < (cons.height-lines)*cons.width; i++ {
|
||||
cons.fb[i] = cons.fb[i+offset]
|
||||
}
|
||||
case Down:
|
||||
for i = cons.height*cons.width - 1; i >= lines*cons.width; i-- {
|
||||
cons.fb[i] = cons.fb[i-offset]
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Write a char to the specified location.
|
||||
func (cons *Ega) Write(ch byte, attr Attr, x, y uint16) {
|
||||
if x >= cons.width || y >= cons.height {
|
||||
return
|
||||
}
|
||||
|
||||
cons.fb[(y*cons.width)+x] = (uint16(attr) << 8) | uint16(ch)
|
||||
}
|
||||
@ -1,212 +0,0 @@
|
||||
package console
|
||||
|
||||
import (
|
||||
"testing"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
func TestEgaInit(t *testing.T) {
|
||||
var cons Ega
|
||||
cons.Init(80, 25, 0xB8000)
|
||||
|
||||
var expWidth uint16 = 80
|
||||
var expHeight uint16 = 25
|
||||
|
||||
if w, h := cons.Dimensions(); w != expWidth || h != expHeight {
|
||||
t.Fatalf("expected console dimensions after Init() to be (%d, %d); got (%d, %d)", expWidth, expHeight, w, h)
|
||||
}
|
||||
}
|
||||
|
||||
func TestEgaClear(t *testing.T) {
|
||||
specs := []struct {
|
||||
// Input rect
|
||||
x, y, w, h uint16
|
||||
|
||||
// Expected area to be cleared
|
||||
expX, expY, expW, expH uint16
|
||||
}{
|
||||
{
|
||||
0, 0, 500, 500,
|
||||
0, 0, 80, 25,
|
||||
},
|
||||
{
|
||||
10, 10, 11, 50,
|
||||
10, 10, 11, 15,
|
||||
},
|
||||
{
|
||||
10, 10, 110, 1,
|
||||
10, 10, 70, 1,
|
||||
},
|
||||
{
|
||||
70, 20, 20, 20,
|
||||
70, 20, 10, 5,
|
||||
},
|
||||
{
|
||||
90, 25, 20, 20,
|
||||
0, 0, 0, 0,
|
||||
},
|
||||
{
|
||||
12, 12, 5, 6,
|
||||
12, 12, 5, 6,
|
||||
},
|
||||
}
|
||||
|
||||
fb := make([]uint16, 80*25)
|
||||
var cons Ega
|
||||
cons.Init(80, 25, uintptr(unsafe.Pointer(&fb[0])))
|
||||
|
||||
testPat := uint16(0xDEAD)
|
||||
clearPat := (uint16(clearColor) << 8) | uint16(clearChar)
|
||||
|
||||
nextSpec:
|
||||
for specIndex, spec := range specs {
|
||||
// Fill FB with test pattern
|
||||
for i := 0; i < len(cons.fb); i++ {
|
||||
fb[i] = testPat
|
||||
}
|
||||
|
||||
cons.Clear(spec.x, spec.y, spec.w, spec.h)
|
||||
|
||||
var x, y uint16
|
||||
for y = 0; y < cons.height; y++ {
|
||||
for x = 0; x < cons.width; x++ {
|
||||
fbVal := fb[(y*cons.width)+x]
|
||||
|
||||
if x < spec.expX || y < spec.expY || x >= spec.expX+spec.expW || y >= spec.expY+spec.expH {
|
||||
if fbVal != testPat {
|
||||
t.Errorf("[spec %d] expected char at (%d, %d) not to be cleared", specIndex, x, y)
|
||||
continue nextSpec
|
||||
}
|
||||
} else {
|
||||
if fbVal != clearPat {
|
||||
t.Errorf("[spec %d] expected char at (%d, %d) to be cleared", specIndex, x, y)
|
||||
continue nextSpec
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestEgaScrollUp(t *testing.T) {
|
||||
specs := []uint16{
|
||||
0,
|
||||
1,
|
||||
2,
|
||||
}
|
||||
|
||||
fb := make([]uint16, 80*25)
|
||||
var cons Ega
|
||||
cons.Init(80, 25, uintptr(unsafe.Pointer(&fb[0])))
|
||||
|
||||
nextSpec:
|
||||
for specIndex, lines := range specs {
|
||||
// Fill buffer with test pattern
|
||||
var x, y, index uint16
|
||||
for y = 0; y < cons.height; y++ {
|
||||
for x = 0; x < cons.width; x++ {
|
||||
fb[index] = (y << 8) | x
|
||||
index++
|
||||
}
|
||||
}
|
||||
|
||||
cons.Scroll(Up, lines)
|
||||
|
||||
// Check that rows 1 to (height - lines) have been scrolled up
|
||||
index = 0
|
||||
for y = 0; y < cons.height-lines; y++ {
|
||||
for x = 0; x < cons.width; x++ {
|
||||
expVal := ((y + lines) << 8) | x
|
||||
if fb[index] != expVal {
|
||||
t.Errorf("[spec %d] expected value at (%d, %d) to be %d; got %d", specIndex, x, y, expVal, cons.fb[index])
|
||||
continue nextSpec
|
||||
}
|
||||
index++
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestEgaScrollDown(t *testing.T) {
|
||||
specs := []uint16{
|
||||
0,
|
||||
1,
|
||||
2,
|
||||
}
|
||||
|
||||
fb := make([]uint16, 80*25)
|
||||
var cons Ega
|
||||
cons.Init(80, 25, uintptr(unsafe.Pointer(&fb[0])))
|
||||
|
||||
nextSpec:
|
||||
for specIndex, lines := range specs {
|
||||
// Fill buffer with test pattern
|
||||
var x, y, index uint16
|
||||
for y = 0; y < cons.height; y++ {
|
||||
for x = 0; x < cons.width; x++ {
|
||||
fb[index] = (y << 8) | x
|
||||
index++
|
||||
}
|
||||
}
|
||||
|
||||
cons.Scroll(Down, lines)
|
||||
|
||||
// Check that rows lines to height have been scrolled down
|
||||
index = lines * cons.width
|
||||
for y = lines; y < cons.height-lines; y++ {
|
||||
for x = 0; x < cons.width; x++ {
|
||||
expVal := ((y - lines) << 8) | x
|
||||
if fb[index] != expVal {
|
||||
t.Errorf("[spec %d] expected value at (%d, %d) to be %d; got %d", specIndex, x, y, expVal, cons.fb[index])
|
||||
continue nextSpec
|
||||
}
|
||||
index++
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestEgaWriteWithOffScreenCoords(t *testing.T) {
|
||||
fb := make([]uint16, 80*25)
|
||||
var cons Ega
|
||||
cons.Init(80, 25, uintptr(unsafe.Pointer(&fb[0])))
|
||||
|
||||
specs := []struct {
|
||||
x, y uint16
|
||||
}{
|
||||
{80, 25},
|
||||
{90, 24},
|
||||
{79, 30},
|
||||
{100, 100},
|
||||
}
|
||||
|
||||
nextSpec:
|
||||
for specIndex, spec := range specs {
|
||||
for i := 0; i < len(cons.fb); i++ {
|
||||
fb[i] = 0
|
||||
}
|
||||
|
||||
cons.Write('!', Red, spec.x, spec.y)
|
||||
|
||||
for i := 0; i < len(cons.fb); i++ {
|
||||
if got := fb[i]; got != 0 {
|
||||
t.Errorf("[spec %d] expected Write() with off-screen coords to be a no-op", specIndex)
|
||||
continue nextSpec
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
func TestEgaWrite(t *testing.T) {
|
||||
fb := make([]uint16, 80*25)
|
||||
var cons Ega
|
||||
cons.Init(80, 25, uintptr(unsafe.Pointer(&fb[0])))
|
||||
|
||||
attr := (Black << 4) | Red
|
||||
cons.Write('!', attr, 0, 0)
|
||||
|
||||
expVal := uint16(attr<<8) | uint16('!')
|
||||
if got := fb[0]; got != expVal {
|
||||
t.Errorf("expected call to Write() to set fb[0] to %d; got %d", expVal, got)
|
||||
}
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user