gg: fixes and Android support (#6161)

examples/2048/main.v

@@ -34,7 +34,7 @@ const (
 		text: 'Points: '
 		pos: Pos{10, 5}
 		cfg: gx.TextCfg{
-			align: gx.align_left
+			align: .left
 			size: 24
 			color: gx.rgb(0, 0, 0)
 		}
@@ -43,7 +43,7 @@ const (
 		text: 'Moves: '
 		pos: Pos{window_width - 160, 5}
 		cfg: gx.TextCfg{
-			align: gx.align_left
+			align: .left
 			size: 24
 			color: gx.rgb(0, 0, 0)
 		}
@@ -52,7 +52,7 @@ const (
 		text: 'Game Over'
 		pos: Pos{80, 220}
 		cfg: gx.TextCfg{
-			align: gx.align_left
+			align: .left
 			size: 100
 			color: gx.rgb(0, 0, 255)
 		}

examples/tetris/tetris.v

@@ -25,12 +25,12 @@ const (
 
 const (
 	text_cfg = gx.TextCfg{
-		align:gx.align_left
+		align:.left
 		size:text_size
 		color:gx.rgb(0, 0, 0)
 	}
 	over_cfg = gx.TextCfg{
-		align:gx.align_left
+		align:.left
 		size:text_size
 		color:gx.white
 	}

vlib/gg/gg.v

@@ -185,13 +185,11 @@ pub fn new_context(cfg Config) &Context {
 	mut g := &Context{
 		width: cfg.width
 		height: cfg.height
-		clear_pass: gfx.create_clear_pass(f32(cfg.bg_color.r) / 255.0, f32(cfg.bg_color.g) / 255.0,
-			f32(cfg.bg_color.b) / 255.0, 1.0)
 		config: cfg
 		render_text: cfg.font_path != ''
 		ft: 0
-
 	}
+	g.set_bg_color(cfg.bg_color)
 	// C.printf('new_context() %p\n', cfg.user_data)
 	window := C.sapp_desc{
 		user_data: g
@@ -218,8 +216,14 @@ pub fn (gg &Context) run() {
 	sapp.run(&gg.window)
 }
 
+pub fn (mut ctx Context) set_bg_color(c gx.Color) {
+	ctx.clear_pass = gfx.create_clear_pass(f32(c.r) / 255.0, f32(c.g) / 255.0,
+			f32(c.b) / 255.0, f32(c.a) / 255.0)
+}
+
+// TODO: Fix alpha
 pub fn (ctx &Context) draw_rect(x, y, w, h f32, c gx.Color) {
-	sgl.c4b(c.r, c.g, c.b, 255)
+	sgl.c4b(c.r, c.g, c.b, c.a)
 	sgl.begin_quads()
 	sgl.v2f(x * ctx.scale, y * ctx.scale)
 	sgl.v2f((x + w) * ctx.scale, y * ctx.scale)
@@ -229,7 +233,7 @@ pub fn (ctx &Context) draw_rect(x, y, w, h f32, c gx.Color) {
 }
 
 pub fn (ctx &Context) draw_empty_rect(x, y, w, h f32, c gx.Color) {
-	sgl.c4b(c.r, c.g, c.b, 255)
+	sgl.c4b(c.r, c.g, c.b, c.a)
 	sgl.begin_line_strip()
 	if ctx.scale == 1 {
 		sgl.v2f(x, y)
@@ -271,7 +275,7 @@ pub fn (gg &Context) end() {
 }
 
 pub fn (ctx &Context) draw_line(x, y, x2, y2 f32, c gx.Color) {
-	sgl.c4b(c.r, c.g, c.b, 255)
+	sgl.c4b(c.r, c.g, c.b, c.a)
 	sgl.begin_line_strip()
 	sgl.v2f(x * ctx.scale, y * ctx.scale)
 	sgl.v2f(x2 * ctx.scale, y2 * ctx.scale)

vlib/gg/text_rendering.v

@@ -6,10 +6,6 @@ import sokol.sfons
 import gx
 import os
 
-const (
-	default_font_size = 16
-)
-
 struct FT {
 pub:
 	fons &C.FONScontext
@@ -31,14 +27,26 @@ fn new_ft(c FTConfig) ?&FT{
 	if c.font_path == '' {
 		// Load default font
 	}
-	if c.font_path == '' || !os.exists(c.font_path) {
-		println('failed to load font "$c.font_path"')
-		return none
+	$if !android {
+		if c.font_path == '' || !os.exists(c.font_path) {
+			println('failed to load font "$c.font_path"')
+			return none
+		}
 	}
-	bytes := os.read_bytes(c.font_path) or {
-		println('failed to load font "$c.font_path"')
-		return none
+
+	mut bytes := []byte{}
+	$if android {
+		bytes = os.read_apk_asset(c.font_path) or {
+			println('failed to load font "$c.font_path"')
+			return none
+		}
+	} $else {
+		bytes = os.read_bytes(c.font_path) or {
+			println('failed to load font "$c.font_path"')
+			return none
+		}
 	}
+
 	bold_path := 'SFNS-bold.ttf'// c.font_path.replace('.ttf', '-bold.ttf')
 	bytes_bold := os.read_bytes(bold_path) or {
 		println('failed to load font "$bold_path"')
@@ -66,15 +74,10 @@ fn new_ft(c FTConfig) ?&FT{
 
 }
 
-pub fn (ctx &Context) draw_text(x, y int, text_ string, cfg gx.TextCfg) {
+fn (ctx &Context) set_cfg(cfg gx.TextCfg) {
 	if !ctx.font_inited {
 		return
 	}
-	//text := text_.trim_space() // TODO remove/optimize
-	mut text := text_
-	if text.contains('\t') {
-		text = text.replace('\t', '    ')
-	}
 	if cfg.bold {
 		ctx.ft.fons.set_font(ctx.ft.font_bold)
 	}
@@ -88,33 +91,30 @@ pub fn (ctx &Context) draw_text(x, y int, text_ string, cfg gx.TextCfg) {
 		ctx.ft.fons.set_font(ctx.ft.font_normal)
 	}
 	scale := if ctx.ft.scale == 0 { f32(1) } else { ctx.ft.scale }
-	mut size := if cfg.size == 0 { gg.default_font_size } else { cfg.size }
-	if cfg.mono {
-		size -= 2
-	}
+	size := if cfg.mono { cfg.size - 2 } else { cfg.size }
 	ctx.ft.fons.set_size(scale * f32(size))
-	if cfg.align == gx.align_right {
-		C.fonsSetAlign(ctx.ft.fons, C.FONS_ALIGN_RIGHT | C.FONS_ALIGN_TOP)
-	}
-	else {
-		C.fonsSetAlign(ctx.ft.fons, C.FONS_ALIGN_LEFT | C.FONS_ALIGN_TOP)
-	}
+	C.fonsSetAlign(ctx.ft.fons, int(cfg.align) | int(cfg.vertical_align))
 	color := C.sfons_rgba(cfg.color.r, cfg.color.g, cfg.color.b, 255)
 	C.fonsSetColor(ctx.ft.fons, color)
 	ascender := f32(0.0)
 	descender := f32(0.0)
 	lh := f32(0.0)
 	ctx.ft.fons.vert_metrics(&ascender, &descender, &lh)
-	C.fonsDrawText(ctx.ft.fons, x*scale, y*scale, text.str, 0) // TODO: check offsets/alignment
+}
+
+pub fn (ctx &Context) draw_text(x, y int, text_ string, cfg gx.TextCfg) {
+	//text := text_.trim_space() // TODO remove/optimize
+	mut text := text_
+	if text.contains('\t') {
+		text = text.replace('\t', '    ')
+	}
+	ctx.set_cfg(cfg)
+	scale := if ctx.ft.scale == 0 { f32(1) } else { ctx.ft.scale }
+	C.fonsDrawText(ctx.ft.fons, x * scale, y * scale, text.str, 0) // TODO: check offsets/alignment
 }
 
 pub fn (ctx &Context) draw_text_def(x, y int, text string) {
-	cfg := gx.TextCfg {
-		color: gx.black
-		size: default_font_size
-		align: gx.align_left
-	}
-	ctx.draw_text(x, y, text, cfg)
+	ctx.draw_text(x, y, text, {})
 }
 
 /*
@@ -127,6 +127,7 @@ pub fn (ft &FT) flush(){
 }
 
 pub fn (ctx &Context) text_width(s string) int {
+	// ctx.set_cfg(cfg) TODO
 	if !ctx.font_inited {
 		return 0
 	}
@@ -136,6 +137,7 @@ pub fn (ctx &Context) text_width(s string) int {
 }
 
 pub fn (ctx &Context) text_height(s string) int {
+	// ctx.set_cfg(cfg) TODO
 	if !ctx.font_inited {
 		return 0
 	}
@@ -145,6 +147,7 @@ pub fn (ctx &Context) text_height(s string) int {
 }
 
 pub fn (ctx &Context) text_size(s string) (int, int) {
+	// ctx.set_cfg(cfg) TODO
 	if !ctx.font_inited {
 		return 0,0
 	}

vlib/gx/text.v

@@ -1,19 +1,39 @@
 module gx
 
-pub const (
-	align_left  = 1
-	align_right = 4
+import fontstash
+
+const (
+	used_import = fontstash.used_import
 )
 
+// TODO: remove these and uae the enum everywhere
+const (
+	align_left = HorizontalAlign.left
+	align_right = HorizontalAlign.right
+)
+
+pub enum HorizontalAlign {
+	left = C.FONS_ALIGN_LEFT
+	center = C.FONS_ALIGN_CENTER
+	right = C.FONS_ALIGN_RIGHT
+}
+
+pub enum VerticalAlign {
+	top = C.FONS_ALIGN_TOP
+	middle = C.FONS_ALIGN_MIDDLE
+	bottom = C.FONS_ALIGN_BOTTOM
+	baseline = C.FONS_ALIGN_BASELINE
+}
+
 pub struct TextCfg {
 pub:
-	color     Color
-	size      int
-	align     int
-	max_width int
-	family    string
-	bold      bool
-	mono      bool
-	italic bool
-
+	color          Color = black
+	size           int = 16
+	align          HorizontalAlign = .left
+	vertical_align VerticalAlign = .top
+	max_width      int
+	family         string
+	bold           bool
+	mono           bool
+	italic         bool
 }

vlib/os/os_android.c.v

@@ -0,0 +1,30 @@
+module os
+
+struct C.ANativeActivity {
+	assetManager &C.AAsetManager
+}
+
+struct C.AAset {}
+
+fn C.AAssetManager_open(&C.AAsetManager, charptr, int) &C.AAset
+fn C.AAsset_getLength(&C.AAset) int
+fn C.AAsset_read(&C.AAset, voidptr, int) int
+fn C.AAsset_close(&C.AAsset)
+
+pub fn read_apk_asset(file string) ?[]byte {
+	act := &C.ANativeActivity(C.sapp_android_get_native_activity())
+	if isnil(act) {
+		return error('Could not get reference to Android activity')
+	}
+	asset := C.AAssetManager_open(act.assetManager, file.str, C.AASSET_MODE_STREAMING)
+	if isnil(asset) {
+		return error('File `$file` not found')
+	}
+	len := C.AAsset_getLength(asset)
+	buf := []byte{ len: len }
+	for {
+		if C.AAsset_read(asset, buf.data, len) > 0 { break }
+	}
+	C.AAsset_close(asset)
+	return buf
+}

vlib/sokol/sapp/sapp.v

@@ -1,5 +1,8 @@
 module sapp
 
+// Android needs a global reference to `g_desc`
+__global g_desc C.sapp_desc
+
 /* returns true after sokol-app has been initialized */
 [inline]
 pub fn isvalid() bool {
@@ -111,6 +114,7 @@ pub fn get_clipboard_string() byteptr {
 /* special run-function for SOKOL_NO_ENTRY (in standard mode this is an empty stub) */
 [inline]
 pub fn run(desc &C.sapp_desc) int {
+	g_desc = desc
 	return C.sapp_run(desc)
 }
 

vlib/v/parser/parser.v

@@ -1656,7 +1656,7 @@ fn (mut p Parser) return_stmt() ast.Return {
 
 const (
 	// modules which allow globals by default
-	global_enabled_mods = ['rand']
+	global_enabled_mods = ['rand', 'sokol.sapp']
 )
 
 // left hand side of `=` or `:=` in `a,b,c := 1,2,3`