drawImage

draw2d/src/cmd/ps_tests/Tests.html

@@ -13,5 +13,6 @@
 	<canvas id="TestStar" width="400" height="400"></canvas>
 	<p>TestTransform</p>
 	<canvas id="TestTransform" width="400" height="400"></canvas>
+	<canvas id="TestFillRect" width="300" height="300"></canvas>
   </body>
 </html>

draw2d/src/cmd/ps_tests/test.js

@@ -17,6 +17,7 @@ function draw(test){
 function executeTests() {
 	draw(TestStar)
 	draw(TestTransform)
+	draw(TestFillRect)
 }
 
 function TestStar(gc) {
@@ -82,3 +83,21 @@ function TestTransform(gc) {
 	gc.stroke()
 	gc.restore()
 }
+function TestFillRect(gc) {
+	gc.moveTo(95,95)
+	gc.lineTo(195,95)
+	gc.lineTo(195, 195)
+	gc.lineTo(95, 195)
+	gc.lineTo(95, 95)
+	
+	
+	gc.moveTo(105,105)
+	gc.lineTo(105, 205)
+	gc.lineTo(205, 205)
+	gc.lineTo(205,105)
+	gc.lineTo(105, 105)
+	
+	gc.fill()
+	
+
+}

draw2d/src/cmd/testimage.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"bufio"
+	"math"
+	"image"
+	"time"
+	"image/png"
+	"draw2d"
+	//"draw2d.googlecode.com/svn/trunk/draw2d/src/pkg/draw2d"
+)
+
+
+func saveToPngFile(filePath string, m image.Image) {
+	f, err := os.Open(filePath, os.O_CREAT|os.O_WRONLY, 0600)
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	defer f.Close()
+	b := bufio.NewWriter(f)
+	err = png.Encode(b, m)
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	err = b.Flush()
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	fmt.Printf("Wrote %s OK.\n", filePath)
+}
+
+func loadFromPngFile(filePath string) image.Image {
+	f, err := os.Open(filePath, 0, 0) 
+	if f == nil {
+		log.Printf("can't open file; err=%s\n", err.String())
+		return nil
+	}
+	defer f.Close()
+	b := bufio.NewReader(f)
+	i, err := png.Decode(b)
+	if err != nil {
+		log.Println(err)
+		os.Exit(1)
+	}
+	fmt.Printf("Read %s OK.\n", filePath)
+	return i
+}
+
+
+func testBubble(gc * draw2d.GraphicContext) {
+	gc.BeginPath()
+	gc.MoveTo(75, 25)
+	gc.QuadCurveTo(25, 25, 25, 62.5)
+	gc.QuadCurveTo(25, 100, 50, 100)
+	gc.QuadCurveTo(50, 120, 30, 125)
+	gc.QuadCurveTo(60, 120, 65, 100)
+	gc.QuadCurveTo(125, 100, 125, 62.5)
+	gc.QuadCurveTo(125, 25, 75, 25)
+	gc.Stroke()
+}
+
+func main() {
+
+
+	source := loadFromPngFile("../../Varna_Railway_Station_HDR.png")
+	i := image.NewRGBA(1024, 768)
+	gc := draw2d.NewGraphicContext(i)
+	gc.Scale(2, 0.5)
+	//gc.Translate(75, 25)
+	gc.Rotate(30 * math.Pi/180)
+	lastTime := time.Nanoseconds()
+	gc.DrawImage(source)
+	dt := time.Nanoseconds() - lastTime
+	fmt.Printf("Draw image: %f ms\n", float(dt)*1e-6)
+	saveToPngFile("../../TestDrawImage.png", i)
+}

draw2d/src/pkg/draw2d/arc.go

@@ -36,7 +36,7 @@ func arc(t VertexConverter, x, y, rx, ry, start, angle, scale float) (lastX, las
 }
 
 
-func arcAdder(adder raster.Adder, x, y, rx, ry, start, angle, scale float) (raster.Point) {
+func arcAdder(adder raster.Adder, x, y, rx, ry, start, angle, scale float) raster.Point {
 	end := start + angle
 	clockWise := true
 	if angle < 0 {
@@ -64,4 +64,3 @@ func arcAdder(adder raster.Adder, x, y, rx, ry, start, angle, scale float) (rast
 	}
 	return floatToPoint(curX, curY)
 }
-

draw2d/src/pkg/draw2d/draw2d.go

@@ -77,6 +77,10 @@ func NewGraphicContext(pi *image.RGBA) *GraphicContext {
 	return gc
 }
 
+func (gc *GraphicContext) GetMatrixTransform() (tr MatrixTransform) {
+	return gc.current.tr
+}
+
 func (gc *GraphicContext) SetMatrixTransform(tr MatrixTransform) {
 	gc.current.tr = tr
 }
@@ -188,6 +192,42 @@ func (gc *GraphicContext) Restore() {
 	}
 }
 
+func (gc *GraphicContext) DrawImage(image image.Image) {
+	width := raster.Fix32(gc.PaintedImage.Bounds().Dx()* 256)
+	height := raster.Fix32(gc.PaintedImage.Bounds().Dy()* 256)
+
+	painter := raster.NewRGBAPainter(gc.PaintedImage)
+
+	p0 := raster.Point{0,0}
+	p1 := raster.Point{0,0}
+	p2 := raster.Point{0,0}
+	p3 := raster.Point{0,0}
+	var i raster.Fix32 = 0
+	for ; i < width; i+=256 {
+		var j raster.Fix32 = 0
+		for ; j < height; j+=256 {
+			p0.X, p0.Y = i, j
+			p1.X, p1.Y = p0.X + 256, p0.Y
+			p2.X, p2.Y = p1.X, p0.Y + 256
+			p3.X, p3.Y = p0.X, p2.Y
+			
+			gc.current.tr.TransformRasterPoint(&p0, &p1, &p2, &p3)
+			gc.fillRasterizer.Start(p0)
+			gc.fillRasterizer.Add1(p1)
+			gc.fillRasterizer.Add1(p2)
+			gc.fillRasterizer.Add1(p3)
+			gc.fillRasterizer.Add1(p0)
+			painter.SetColor(image.At(int(i>>8), int(j>>8)))
+			gc.fillRasterizer.Rasterize(painter)
+			gc.fillRasterizer.Clear()
+		}
+	}
+}
+
+func (gc *GraphicContext) LastPoint() (x, y float) {
+	return gc.current.path.LastPoint()
+}
+
 func (gc *GraphicContext) BeginPath() {
 	gc.current.path = new(PathStorage)
 }

draw2d/src/pkg/draw2d/path_adder.go

@@ -42,7 +42,7 @@ type PathAdder struct {
 	ApproximationScale float
 }
 
-func NewPathAdder(adder raster.Adder) (* PathAdder) {
+func NewPathAdder(adder raster.Adder) *PathAdder {
 	return &PathAdder{adder, raster.Point{0, 0}, 1}
 }
 
@@ -85,4 +85,3 @@ func (pathAdder *PathAdder) ConvertCommand(cmd PathCmd, vertices ...float) int {
 	}
 	return 0
 }
-