func CreateRGBSurface(width, height int) *Surface {
var rmask, gmask, bmask, amask uint32
byteorder := 0
bigendian := 0
if byteorder == bigendian {
rmask = 0xff000000
gmask = 0x00ff0000
bmask = 0x0000ff00
amask = 0x000000ff
} else {
rmask = 0x000000ff
gmask = 0x0000ff00
bmask = 0x00ff0000
amask = 0xff000000
}
inner := sdl.CreateRGBSurface(
sdl.SRCALPHA, // flags
width, height,
32, // depth
rmask, gmask, bmask, amask,
)
if inner == nil {
panic(sdl.GetError())
}
return &Surface{inner}
}
func (d *LEM1802) LoadFontFromTTF(filename string) (font *Font, err error) {
if filename == "" {
filename = resourcemanager.NewResourceManager("github.com/kierdavis/go/dcpuem/lem1802").GetFilename("FreeMono.ttf")
}
f := ttf.OpenFont(filename, 8)
if f == nil {
return nil, ErrCouldNotLoadFont
}
defer f.Close()
font = new(Font)
for ch := uint16(0); ch < 128; ch++ {
_, _, _, _, advance, e := f.GlyphMetrics(ch)
if e != 0 {
return nil, ErrCouldNotLoadFont
}
surf := sdl.CreateRGBSurface(sdl.SWSURFACE|sdl.SRCALPHA, advance, 8, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000)
fontSurf := ttf.RenderText_Blended(f, string(ch), sdl.Color{255, 255, 255, 0})
fontSurf.Blit(nil, surf, nil)
font[ch] = surf
}
return font, nil
}
func RenderCursorSurface(font *ttf.Font) *sdl.Surface {
height := font.Height()
width := 1
width = int(0.1 * float64(height))
if width < 1 {
width = 1
}
return sdl.CreateRGBSurface(0, width, height, 32, 0, 0, 0, 0)
}
func NewFont(filename string, size int, c color.Color) *Font {
var font Font
font.textures = make(map[rune]gl.Texture)
font.widths = make(map[rune]int)
extfont := ttf.OpenFont(filename, size)
if extfont == nil {
panic("Could not load font")
}
defer extfont.Close()
font.height = extfont.LineSkip()
for _, ch := range "abcdefghijklmnopqrdstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789 :;@'<>,.?/~#{}[]!£$%^&*()_-+=\"\\|" {
_, _, _, _, advance, err := extfont.GlyphMetrics(uint16(ch))
if err != 0 {
panic("Could not get glyph metrics")
}
// Create a bitmap with width=advance, height=font.height
surface := sdl.CreateRGBSurface(sdl.SWSURFACE|sdl.SRCALPHA, advance, font.height, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000)
//surface.FillRect(&sdl.Rect{0,0, uint16(advance), uint16(font.height)}, 0x0)
// rect := sdl.Rect{0,0, uint16(advance), uint16(ascent)}
// rect := sdl.Rect{int16(minx), int16(ascent)-int16(maxy), 0, 0}
fontSurface := ttf.RenderText_Blended(extfont, string(ch), sdl.ColorFromGoColor(c))
fontSurface.Blit(nil, surface, nil)
rgba := image.NewRGBA(image.Rect(0, 0, advance, font.height))
for x := 0; x < advance; x++ {
for y := 0; y < font.height; y++ {
rgba.Set(x, y, fontSurface.At(x, font.height-y))
}
}
font.widths[ch] = advance
font.textures[ch] = gl.GenTexture()
font.textures[ch].Bind(gl.TEXTURE_2D)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST)
gl.TexImage2D(gl.TEXTURE_2D, 0, gl.RGBA, advance, font.height, 0, gl.RGBA, gl.UNSIGNED_BYTE, &rgba.Pix[0])
font.textures[ch].Unbind(gl.TEXTURE_2D)
}
return &font
}
func (self MathShower) Render() *sdl.Surface {
switch self.Subtype {
case "Number":
font1 := ttf.OpenFont(self.Fontname, self.Fontsize())
defer font1.Close()
txt := ttf.RenderUTF8_Blended(font1, self.Txt, self.Color)
if self.Indextxt == "" && !self.RenderEmptyIndextxt {
mainsurface := sdl.CreateRGBSurface(0, txt.Bounds().Max.X,
txt.Bounds().Max.Y, 32, 0, 0, 0, 0)
mainsurface.FillRect(nil, 0xFFFFFF)
mainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, txt, nil)
if self.CursorPosition != -1 && self.CursorPosition < len(self.Txt) {
curssurf := RenderCursorSurface(font1)
if self.CursorPosition == 0 {
mainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, curssurf, nil)
} else if self.CursorPosition == len(self.Txt) {
mainsurface.Blit(&sdl.Rect{int16(mainsurface.Bounds().Max.X - curssurf.Bounds().Max.X), 0, 0, 0},
curssurf, nil)
} else {
inputwhere, _, _ := font1.SizeUTF8(self.Txt[:self.CursorPosition])
mainsurface.Blit(&sdl.Rect{int16(inputwhere), 0, 0, 0}, curssurf, nil)
}
}
return mainsurface
} else if self.RenderEmptyIndextxt {
font2 := ttf.OpenFont(self.Fontname, self.Fontsize()-int(float64(self.Fontsize())*0.5))
defer font2.Close()
if font2 == nil {
panic(sdl.GetError())
}
subtext := ttf.RenderUTF8_Blended(font2, self.Indextxt, self.Color)
mainsurface := sdl.CreateRGBSurface(0, txt.Bounds().Max.X+subtext.Bounds().Max.X,
txt.Bounds().Max.Y+subtext.Bounds().Max.Y, 32, 0, 0, 0, 0)
mainsurface.FillRect(nil, 0xFFFFFF)
mainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, txt, nil)
overmainsurface := sdl.CreateRGBSurface(0, txt.Bounds().Max.X, txt.Bounds().Max.Y, 32,
0, 0, 0, 0)
overmainsurface.FillRect(nil, 0xFFFFFF)
overmainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, txt, nil)
if self.CursorPosition != -1 && self.CursorPosition < len(self.Txt) {
curssurf := RenderCursorSurface(font1)
if self.CursorPosition == 0 {
overmainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, curssurf, nil)
} else if self.CursorPosition == len(self.Txt) {
overmainsurface.Blit(&sdl.Rect{int16(overmainsurface.Bounds().Max.X - curssurf.Bounds().Max.X), 0, 0, 0},
curssurf, nil)
} else {
inputwhere, _, _ := font1.SizeUTF8(self.Txt[:self.CursorPosition])
overmainsurface.Blit(&sdl.Rect{int16(inputwhere), 0, 0, 0}, curssurf, nil)
}
}
mainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, overmainsurface, nil)
submainsurface := sdl.CreateRGBSurface(0, font2.Height()+2+2, font2.Height()+2+2,
32, 0, 0, 0, 0)
subsubmainsurface := sdl.CreateRGBSurface(0, font2.Height()+2, font2.Height()+2,
32, 0, 0, 0, 0)
submainsurface.FillRect(nil, 0x0)
subsubmainsurface.FillRect(nil, 0xFFFFFF)
if self.CursorPosition == len(self.Txt) {
curssurf := RenderCursorSurface(font2)
subsubmainsurface.Blit(&sdl.Rect{2, 1, 0, 0}, curssurf, nil)
}
submainsurface.Blit(&sdl.Rect{1, 1, 0, 0}, subsubmainsurface, nil)
mainsurface.Blit(&sdl.Rect{int16(txt.Bounds().Max.X), int16(font1.Ascent()), 0, 0},
submainsurface, nil)
return mainsurface
}
font2 := ttf.OpenFont(self.Fontname, self.Fontsize()-int(float64(self.Fontsize())*0.5))
defer font2.Close()
if font2 == nil {
panic(sdl.GetError())
}
subtext := ttf.RenderUTF8_Blended(font2, self.Indextxt, self.Color)
mainsurface := sdl.CreateRGBSurface(0, txt.Bounds().Max.X+subtext.Bounds().Max.X,
txt.Bounds().Max.Y+subtext.Bounds().Max.Y, 32, 0, 0, 0, 0)
mainsurface.FillRect(nil, 0xFFFFFF)
mainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, txt, nil)
overmainsurface := sdl.CreateRGBSurface(0, txt.Bounds().Max.X, txt.Bounds().Max.Y, 32,
0, 0, 0, 0)
overmainsurface.FillRect(nil, 0xFFFFFF)
overmainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, txt, nil)
if self.CursorPosition != -1 && self.CursorPosition < len(self.Txt) {
curssurf := RenderCursorSurface(font1)
if self.CursorPosition == 0 {
overmainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, curssurf, nil)
} else if self.CursorPosition == len(self.Txt) {
overmainsurface.Blit(&sdl.Rect{int16(overmainsurface.Bounds().Max.X - curssurf.Bounds().Max.X), 0, 0, 0},
curssurf, nil)
} else {
inputwhere, _, _ := font1.SizeUTF8(self.Txt[:self.CursorPosition])
overmainsurface.Blit(&sdl.Rect{int16(inputwhere), 0, 0, 0}, curssurf, nil)
}
}
mainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, overmainsurface, nil)
submainsurface := sdl.CreateRGBSurface(0, subtext.Bounds().Max.X, subtext.Bounds().Max.Y,
32, 0, 0, 0, 0)
submainsurface.FillRect(nil, 0xFFFFFF)
submainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, subtext, nil)
if self.CursorPosition >= len(self.Txt) {
Subcurspos := self.CursorPosition - len(self.Txt)
curssurf := RenderCursorSurface(font2)
if Subcurspos == 0 {
submainsurface.Blit(&sdl.Rect{0, 0, 0, 0}, curssurf, nil)
} else {
inputwhere, _, _ := font2.SizeUTF8(self.Indextxt[:Subcurspos])
submainsurface.Blit(&sdl.Rect{int16(inputwhere), 0, 0, 0}, curssurf, nil)
}
}
mainsurface.Blit(&sdl.Rect{int16(txt.Bounds().Max.X), int16(font1.Ascent()), 0, 0},
submainsurface, nil)
return mainsurface
case "Fraction":
numeratorsurf := (*self.Parts)[0].Render()
Denominatorsurf := (*self.Parts)[1].Render()
ysum := numeratorsurf.Bounds().Max.Y + Denominatorsurf.Bounds().Max.Y
maxx := numeratorsurf.Bounds().Max.X
if Denominatorsurf.Bounds().Max.X > maxx {
maxx = Denominatorsurf.Bounds().Max.X
}
mainsurface := sdl.CreateRGBSurface(0, maxx+6, ysum, 32,
0, 0, 0, 0)
mainsurface.FillRect(nil, 0xFFFFFF)
line := sdl.CreateRGBSurface(0, maxx+6, 1, 32, 0, 0, 0, 0)
line.FillRect(nil, 0x000000)
mainsurface.Blit(&sdl.Rect{int16(float64(maxx-numeratorsurf.Bounds().Max.X) / 2),
0, 0, 0}, numeratorsurf, nil)
mainsurface.Blit(&sdl.Rect{int16(float64(maxx-Denominatorsurf.Bounds().Max.X) / 2),
int16(numeratorsurf.Bounds().Max.Y), 0, 0}, Denominatorsurf, nil)
mainsurface.Blit(&sdl.Rect{0, int16(numeratorsurf.Bounds().Max.Y), 0, 0}, line, nil)
return mainsurface
}
var k *sdl.Surface
return k
}