Add shaded text sample and gm test.

git-svn-id: http://skia.googlecode.com/svn/trunk@725 2bbb7eff-a529-9590-31e7-b0007b416f81

4 files changed, 406 insertions, 0 deletions

diff --git a/gm/gm_files.mk b/gm/gm_files.mk
index 50eb311d16..5a2dd6fdf9 100644
--- a/gm/gm_files.mk
+++ b/gm/gm_files.mk
@@ -5,4 +5,5 @@ SOURCE := \
 	shapes.cpp \
 	tilemodes.cpp \
 	xfermodes.cpp \
+	shadertext.cpp \
 	gmmain.cpp
diff --git a/gm/shadertext.cpp b/gm/shadertext.cpp
new file mode 100644
index 0000000000..07b88614b2
--- /dev/null
+++ b/gm/shadertext.cpp
@@ -0,0 +1,198 @@
+#include "gm.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "SkUnitMappers.h"
+
+namespace skiagm {
+
+static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
+    bm->setConfig(config, w, h);
+    bm->allocPixels();
+    bm->eraseColor(0);
+
+    SkCanvas    canvas(*bm);
+    SkScalar s = w < h ? w : h;
+    SkPoint     pts[] = { 0, 0, s, s };
+    SkColor     colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
+    SkScalar    pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
+    SkPaint     paint;
+
+    SkUnitMapper*   um = NULL;
+
+    um = new SkCosineMapper;
+
+    SkAutoUnref au(um);
+
+    paint.setDither(true);
+    paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos,
+                SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode, um))->unref();
+    canvas.drawPaint(paint);
+}
+
+SkShader* MakeBitmapShader(SkShader::TileMode tx, SkShader::TileMode ty,
+                           int w, int h) {
+    static SkBitmap bmp;
+    if (bmp.isNull()) {
+        makebm(&bmp, SkBitmap::kARGB_8888_Config, w/2, h/4);
+    }
+    return SkShader::CreateBitmapShader(bmp, tx, ty);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+struct GradData {
+    int             fCount;
+    const SkColor*  fColors;
+    const SkScalar* fPos;
+};
+
+static const SkColor gColors[] = {
+    SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK
+};
+
+static const GradData gGradData[] = {
+    { 2, gColors, NULL },
+    { 5, gColors, NULL },
+};
+
+static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data,
+                            SkShader::TileMode tm, SkUnitMapper* mapper) {
+    return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos,
+                                          data.fCount, tm, mapper);
+}
+
+static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data,
+                            SkShader::TileMode tm, SkUnitMapper* mapper) {
+    SkPoint center;
+    center.set(SkScalarAve(pts[0].fX, pts[1].fX),
+               SkScalarAve(pts[0].fY, pts[1].fY));
+    return SkGradientShader::CreateRadial(center, center.fX, data.fColors,
+                                          data.fPos, data.fCount, tm, mapper);
+}
+
+static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data,
+                           SkShader::TileMode tm, SkUnitMapper* mapper) {
+    SkPoint center;
+    center.set(SkScalarAve(pts[0].fX, pts[1].fX),
+               SkScalarAve(pts[0].fY, pts[1].fY));
+    return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors,
+                                         data.fPos, data.fCount, mapper);
+}
+
+static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data,
+                           SkShader::TileMode tm, SkUnitMapper* mapper) {
+    SkPoint center0, center1;
+    center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
+                SkScalarAve(pts[0].fY, pts[1].fY));
+    center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
+                SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
+    return SkGradientShader::CreateTwoPointRadial(
+                            center1, (pts[1].fX - pts[0].fX) / 7,
+                            center0, (pts[1].fX - pts[0].fX) / 2,
+                            data.fColors, data.fPos, data.fCount, tm, mapper);
+}
+
+typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data,
+                     SkShader::TileMode tm, SkUnitMapper* mapper);
+static const GradMaker gGradMakers[] = {
+    MakeLinear, MakeRadial, MakeSweep, Make2Radial
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class ShaderTextGM : public GM {
+public:
+	ShaderTextGM() {}
+
+protected:
+
+    SkString onShortName() {
+        return SkString("shadertext");
+    }
+
+	SkISize onISize() { return make_isize(950, 500); }
+
+    void drawBG(SkCanvas* canvas) {
+        canvas->drawColor(0xFFDDDDDD);
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        this->drawBG(canvas);
+
+        const char text[] = "Shaded Text";
+        const int textLen = SK_ARRAY_COUNT(text) - 1;
+        static int pointSize = SkIntToScalar(48);
+
+        int w = pointSize * textLen;
+        int h = pointSize;
+
+        SkPoint pts[2] = {
+            { 0, 0 },
+            { SkIntToScalar(w), SkIntToScalar(h) }
+        };
+        SkScalar textBase = SkIntToScalar(h/2);
+
+        SkShader::TileMode tileModes[] = {
+            SkShader::kClamp_TileMode,
+            SkShader::kRepeat_TileMode,
+            SkShader::kMirror_TileMode
+        };
+
+        static const int gradCount = SK_ARRAY_COUNT(gGradData) *
+                                     SK_ARRAY_COUNT(gGradMakers);
+        static const int bmpCount = SK_ARRAY_COUNT(tileModes) *
+                                    SK_ARRAY_COUNT(tileModes);
+        SkShader* shaders[gradCount + bmpCount];
+
+        int shdIdx = 0;
+        for (size_t d = 0; d < SK_ARRAY_COUNT(gGradData); ++d) {
+            for (size_t m = 0; m < SK_ARRAY_COUNT(gGradMakers); ++m) {
+                shaders[shdIdx++] = gGradMakers[m](pts,
+                                                   gGradData[d],
+                                                   SkShader::kClamp_TileMode,
+                                                   NULL);
+            }
+        }
+        for (size_t tx = 0; tx < SK_ARRAY_COUNT(tileModes); ++tx) {
+            for (size_t ty = 0; ty < SK_ARRAY_COUNT(tileModes); ++ty) {
+                shaders[shdIdx++] = MakeBitmapShader(tileModes[tx],
+                                                     tileModes[ty],
+                                                     w/8, h);
+            }
+        }
+
+        SkPaint paint;
+        paint.setDither(true);
+        paint.setAntiAlias(true);
+        paint.setTextSize(SkIntToScalar(pointSize));
+
+        canvas->save();
+        canvas->translate(SkIntToScalar(20), SkIntToScalar(10));
+
+        static const int testsPerCol = 8;
+        static const int rowHeight = 60;
+        static const int colWidth = 300;
+        canvas->save();
+        for (size_t s = 0; s < SK_ARRAY_COUNT(shaders); s++) {
+            canvas->save();
+            canvas->translate(SkIntToScalar((s / testsPerCol) * colWidth),
+                              SkIntToScalar((s % testsPerCol) * rowHeight));
+                              paint.setShader(shaders[s])->ref();
+            canvas->drawText(text, textLen, 0, textBase, paint);
+            canvas->restore();
+        }
+        canvas->restore();
+    }
+
+private:
+    typedef GM INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new ShaderTextGM; }
+static GMRegistry reg(MyFactory);
+
+}
+
+
diff --git a/samplecode/SampleShaderText.cpp b/samplecode/SampleShaderText.cpp
new file mode 100644
index 0000000000..36692d292a
--- /dev/null
+++ b/samplecode/SampleShaderText.cpp
@@ -0,0 +1,199 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "SkUnitMappers.h"
+
+static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
+    bm->setConfig(config, w, h);
+    bm->allocPixels();
+    bm->eraseColor(0);
+
+    SkCanvas    canvas(*bm);
+    SkScalar s = w < h ? w : h;
+    SkPoint     pts[] = { 0, 0, s, s };
+    SkColor     colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
+    SkScalar    pos[] = { 0, SK_Scalar1/2, SK_Scalar1 };
+    SkPaint     paint;
+
+    SkUnitMapper*   um = NULL;
+
+    um = new SkCosineMapper;
+
+    SkAutoUnref au(um);
+
+    paint.setDither(true);
+    paint.setShader(SkGradientShader::CreateLinear(pts, colors, pos,
+                SK_ARRAY_COUNT(colors), SkShader::kClamp_TileMode, um))->unref();
+    canvas.drawPaint(paint);
+}
+
+SkShader* MakeBitmapShader(SkShader::TileMode tx, SkShader::TileMode ty,
+                           int w, int h) {
+    static SkBitmap bmp;
+    if (bmp.isNull()) {
+        makebm(&bmp, SkBitmap::kARGB_8888_Config, w/2, h/4);
+    }
+    return SkShader::CreateBitmapShader(bmp, tx, ty);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+
+struct GradData {
+    int             fCount;
+    const SkColor*  fColors;
+    const SkScalar* fPos;
+};
+
+static const SkColor gColors[] = {
+    SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorWHITE, SK_ColorBLACK
+};
+
+static const GradData gGradData[] = {
+    { 2, gColors, NULL },
+    { 5, gColors, NULL },
+};
+
+static SkShader* MakeLinear(const SkPoint pts[2], const GradData& data,
+                            SkShader::TileMode tm, SkUnitMapper* mapper) {
+    return SkGradientShader::CreateLinear(pts, data.fColors, data.fPos,
+                                          data.fCount, tm, mapper);
+}
+
+static SkShader* MakeRadial(const SkPoint pts[2], const GradData& data,
+                            SkShader::TileMode tm, SkUnitMapper* mapper) {
+    SkPoint center;
+    center.set(SkScalarAve(pts[0].fX, pts[1].fX),
+               SkScalarAve(pts[0].fY, pts[1].fY));
+    return SkGradientShader::CreateRadial(center, center.fX, data.fColors,
+                                          data.fPos, data.fCount, tm, mapper);
+}
+
+static SkShader* MakeSweep(const SkPoint pts[2], const GradData& data,
+                           SkShader::TileMode tm, SkUnitMapper* mapper) {
+    SkPoint center;
+    center.set(SkScalarAve(pts[0].fX, pts[1].fX),
+               SkScalarAve(pts[0].fY, pts[1].fY));
+    return SkGradientShader::CreateSweep(center.fX, center.fY, data.fColors,
+                                         data.fPos, data.fCount, mapper);
+}
+
+static SkShader* Make2Radial(const SkPoint pts[2], const GradData& data,
+                           SkShader::TileMode tm, SkUnitMapper* mapper) {
+    SkPoint center0, center1;
+    center0.set(SkScalarAve(pts[0].fX, pts[1].fX),
+                SkScalarAve(pts[0].fY, pts[1].fY));
+    center1.set(SkScalarInterp(pts[0].fX, pts[1].fX, SkIntToScalar(3)/5),
+                SkScalarInterp(pts[0].fY, pts[1].fY, SkIntToScalar(1)/4));
+    return SkGradientShader::CreateTwoPointRadial(
+                            center1, (pts[1].fX - pts[0].fX) / 7,
+                            center0, (pts[1].fX - pts[0].fX) / 2,
+                            data.fColors, data.fPos, data.fCount, tm, mapper);
+}
+
+typedef SkShader* (*GradMaker)(const SkPoint pts[2], const GradData& data,
+                     SkShader::TileMode tm, SkUnitMapper* mapper);
+static const GradMaker gGradMakers[] = {
+    MakeLinear, MakeRadial, MakeSweep, Make2Radial
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class ShaderTextView : public SkView {
+public:
+	ShaderTextView() {}
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "Shader Text");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+
+    void drawBG(SkCanvas* canvas) {
+        canvas->drawColor(0xFFDDDDDD);
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        this->drawBG(canvas);
+
+        const char text[] = "Shaded Text";
+        const int textLen = SK_ARRAY_COUNT(text) - 1;
+        static int pointSize = SkIntToScalar(48);
+
+        int w = pointSize * textLen;
+        int h = pointSize;
+
+        SkPoint pts[2] = {
+            { 0, 0 },
+            { SkIntToScalar(w), SkIntToScalar(h) }
+        };
+        SkScalar textBase = SkIntToScalar(h/2);
+
+        SkShader::TileMode tileModes[] = {
+            SkShader::kClamp_TileMode,
+            SkShader::kRepeat_TileMode,
+            SkShader::kMirror_TileMode
+        };
+
+        static const int gradCount = SK_ARRAY_COUNT(gGradData) *
+                                     SK_ARRAY_COUNT(gGradMakers);
+        static const int bmpCount = SK_ARRAY_COUNT(tileModes) *
+                                    SK_ARRAY_COUNT(tileModes);
+        SkShader* shaders[gradCount + bmpCount];
+
+        int shdIdx = 0;
+        for (size_t d = 0; d < SK_ARRAY_COUNT(gGradData); ++d) {
+            for (size_t m = 0; m < SK_ARRAY_COUNT(gGradMakers); ++m) {
+                shaders[shdIdx++] = gGradMakers[m](pts,
+                                                   gGradData[d],
+                                                   SkShader::kClamp_TileMode,
+                                                   NULL);
+            }
+        }
+        for (size_t tx = 0; tx < SK_ARRAY_COUNT(tileModes); ++tx) {
+            for (size_t ty = 0; ty < SK_ARRAY_COUNT(tileModes); ++ty) {
+                shaders[shdIdx++] = MakeBitmapShader(tileModes[tx],
+                                                     tileModes[ty],
+                                                     w/8, h);
+            }
+        }
+
+        SkPaint paint;
+        paint.setDither(true);
+        paint.setAntiAlias(true);
+        paint.setTextSize(SkIntToScalar(pointSize));
+
+        canvas->save();
+        canvas->translate(SkIntToScalar(20), SkIntToScalar(10));
+
+        static const int testsPerCol = 8;
+        static const int rowHeight = 60;
+        static const int colWidth = 300;
+        canvas->save();
+        for (size_t s = 0; s < SK_ARRAY_COUNT(shaders); s++) {
+            canvas->save();
+            canvas->translate(SkIntToScalar((s / testsPerCol) * colWidth),
+                              SkIntToScalar((s % testsPerCol) * rowHeight));
+                              paint.setShader(shaders[s])->ref();
+            canvas->drawText(text, textLen, 0, textBase, paint);
+            canvas->restore();
+        }
+        canvas->restore();
+
+        canvas->translate(0, SkIntToScalar(370));
+        this->inval(NULL);
+    }
+
+private:
+    typedef SkView INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new ShaderTextView; }
+static SkViewRegister reg(MyFactory);
+
diff --git a/xcode/sampleapp/SampleApp.xcodeproj/project.pbxproj b/xcode/sampleapp/SampleApp.xcodeproj/project.pbxproj
index 18bca17378..1a39d9add5 100644
--- a/xcode/sampleapp/SampleApp.xcodeproj/project.pbxproj
+++ b/xcode/sampleapp/SampleApp.xcodeproj/project.pbxproj
@@ -148,6 +148,8 @@
 		8D0C4E8D0486CD37000505A6 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = 0867D6AAFE840B52C02AAC07 /* InfoPlist.strings */; };
 		8D0C4E8E0486CD37000505A6 /* main.nib in Resources */ = {isa = PBXBuildFile; fileRef = 02345980000FD03B11CA0E72 /* main.nib */; };
 		8D0C4E920486CD37000505A6 /* Carbon.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 20286C33FDCF999611CA2CEA /* Carbon.framework */; };
+		D55BEE6712EF44B90055D6FD /* shadertext.cpp in Sources */ = {isa = PBXBuildFile; fileRef = D55BEE6612EF44B90055D6FD /* shadertext.cpp */; };
+		D5962B3A12EDFC7600B478DF /* SampleShaderText.cpp in Sources */ = {isa = PBXBuildFile; fileRef = D5962B3812EDFC7600B478DF /* SampleShaderText.cpp */; };
 		D5A682D712E9CE8500CDDDC6 /* SamplePatch.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 0041CE340F00A12400695E8C /* SamplePatch.cpp */; };
 		D5F4A21F12E9D75300DE986A /* SampleFillType.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 0041CE270F00A12400695E8C /* SampleFillType.cpp */; };
 /* End PBXBuildFile section */
@@ -412,6 +414,8 @@
 		4A9504CAFFE6A41611CA0CBA /* CoreServices.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = CoreServices.framework; path = /System/Library/Frameworks/CoreServices.framework; sourceTree = "<absolute>"; };
 		8D0C4E960486CD37000505A6 /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist; path = Info.plist; sourceTree = "<group>"; };
 		8D0C4E970486CD37000505A6 /* CICarbonSample.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = CICarbonSample.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		D55BEE6612EF44B90055D6FD /* shadertext.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = shadertext.cpp; path = ../../gm/shadertext.cpp; sourceTree = SOURCE_ROOT; };
+		D5962B3812EDFC7600B478DF /* SampleShaderText.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleShaderText.cpp; path = ../../samplecode/SampleShaderText.cpp; sourceTree = SOURCE_ROOT; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -460,6 +464,7 @@
 				007A7CA50F01658C00A2D6EE /* SamplePoints.cpp */,
 				007A7CA70F01658C00A2D6EE /* SampleRegion.cpp */,
 				007A7CA80F01658C00A2D6EE /* SampleShaders.cpp */,
+				D5962B3812EDFC7600B478DF /* SampleShaderText.cpp */,
 				007A7CA90F01658C00A2D6EE /* SampleStrokeText.cpp */,
 				007A7CAC0F01658C00A2D6EE /* SampleTextAlpha.cpp */,
 				007A7CAD0F01658C00A2D6EE /* SampleTextEffects.cpp */,
@@ -679,6 +684,7 @@
 				27C4624512BFB2C700DBB1F6 /* bitmapfilters.cpp */,
 				27C4624612BFB2C700DBB1F6 /* filltypes.cpp */,
 				27C4624712BFB2C700DBB1F6 /* gradients.cpp */,
+				D55BEE6612EF44B90055D6FD /* shadertext.cpp */,
 				27C4624812BFB2C700DBB1F6 /* shapes.cpp */,
 				27C4624912BFB2C700DBB1F6 /* tilemodes.cpp */,
 				27C4624A12BFB2C700DBB1F6 /* xfermodes.cpp */,
@@ -1022,6 +1028,8 @@
 				009F9D1A12C3EB2600C7FD4A /* SampleGM.cpp in Sources */,
 				D5A682D712E9CE8500CDDDC6 /* SamplePatch.cpp in Sources */,
 				D5F4A21F12E9D75300DE986A /* SampleFillType.cpp in Sources */,
+				D5962B3A12EDFC7600B478DF /* SampleShaderText.cpp in Sources */,
+				D55BEE6712EF44B90055D6FD /* shadertext.cpp in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};