Added support for six-parameter radial gradients.

The extended radial gradients conform to the radial gradient
specification in HTML 5 canvas.

Task-number: QTBUG-14075
Reviewed-by: Andreas Kling

4 files changed, 128 insertions, 2 deletions

diff --git a/tests/arthur/common/paintcommands.cpp b/tests/arthur/common/paintcommands.cpp
index 7a018e3..9273142 100644
--- a/tests/arthur/common/paintcommands.cpp
+++ b/tests/arthur/common/paintcommands.cpp
@@ -346,8 +346,12 @@ void PaintCommands::staticInit()
                       "gradient_setLinear 1.0 1.0 2.0 2.0");
     DECL_PAINTCOMMAND("gradient_setRadial", command_gradient_setRadial,
                       "^gradient_setRadial\\s+([\\w.]*)\\s+([\\w.]*)\\s+([\\w.]*)\\s?([\\w.]*)\\s?([\\w.]*)$",
-                      "gradient_setRadial <cx> <cy> <rad> <fx> <fy>\n  - C is the center\n  - rad is the angle in degrees\n  - F is the focal point",
+                      "gradient_setRadial <cx> <cy> <rad> <fx> <fy>\n  - C is the center\n  - rad is the radius\n  - F is the focal point",
                       "gradient_setRadial 1.0 1.0 45.0 2.0 2.0");
+    DECL_PAINTCOMMAND("gradient_setRadialExtended", command_gradient_setRadialExtended,
+                      "^gradient_setRadialExtended\\s+([\\w.]*)\\s+([\\w.]*)\\s+([\\w.]*)\\s?([\\w.]*)\\s?([\\w.]*)\\s?([\\w.]*)$",
+                      "gradient_setRadialExtended <cx> <cy> <rad> <fx> <fy> <frad>\n  - C is the center\n  - rad is the center radius\n  - F is the focal point\n  - frad is the focal radius",
+                      "gradient_setRadialExtended 1.0 1.0 45.0 2.0 2.0 45.0");
     DECL_PAINTCOMMAND("gradient_setLinearPen", command_gradient_setLinearPen,
                       "^gradient_setLinearPen\\s+([\\w.]*)\\s+([\\w.]*)\\s+([\\w.]*)\\s+([\\w.]*)$",
                       "gradient_setLinearPen <x1> <y1> <x2> <y2>",
@@ -2400,7 +2404,7 @@ void PaintCommands::command_gradient_setRadial(QRegExp re)
     double fy = convertToDouble(caps.at(5));
 
     if (m_verboseMode)
-        printf(" -(lance) gradient_setRadial center=(%.2f, %.2f), radius=%.2f focal=(%.2f, %.2f), "
+        printf(" -(lance) gradient_setRadial center=(%.2f, %.2f), radius=%.2f, focal=(%.2f, %.2f), "
                "spread=%d\n",
                cx, cy, rad, fx, fy, m_gradientSpread);
 
@@ -2415,6 +2419,32 @@ void PaintCommands::command_gradient_setRadial(QRegExp re)
 }
 
 /***************************************************************************************************/
+void PaintCommands::command_gradient_setRadialExtended(QRegExp re)
+{
+    QStringList caps = re.capturedTexts();
+    double cx = convertToDouble(caps.at(1));
+    double cy = convertToDouble(caps.at(2));
+    double rad = convertToDouble(caps.at(3));
+    double fx = convertToDouble(caps.at(4));
+    double fy = convertToDouble(caps.at(5));
+    double frad = convertToDouble(caps.at(6));
+
+    if (m_verboseMode)
+        printf(" -(lance) gradient_setRadialExtended center=(%.2f, %.2f), radius=%.2f, focal=(%.2f, %.2f), "
+               "focal radius=%.2f, spread=%d\n",
+               cx, cy, rad, fx, fy, frad, m_gradientSpread);
+
+    QRadialGradient rg(QPointF(cx, cy), rad, QPointF(fx, fy), frad);
+    rg.setStops(m_gradientStops);
+    rg.setSpread(m_gradientSpread);
+    rg.setCoordinateMode(m_gradientCoordinate);
+    QBrush brush(rg);
+    QTransform brush_matrix = m_painter->brush().transform();
+    brush.setTransform(brush_matrix);
+    m_painter->setBrush(brush);
+}
+
+/***************************************************************************************************/
 void PaintCommands::command_gradient_setConical(QRegExp re)
 {
     QStringList caps = re.capturedTexts();
diff --git a/tests/arthur/common/paintcommands.h b/tests/arthur/common/paintcommands.h
index 2740412..08c0e25 100644
--- a/tests/arthur/common/paintcommands.h
+++ b/tests/arthur/common/paintcommands.h
@@ -179,6 +179,7 @@ private:
     void command_gradient_setConical(QRegExp re);
     void command_gradient_setLinear(QRegExp re);
     void command_gradient_setRadial(QRegExp re);
+    void command_gradient_setRadialExtended(QRegExp re);
     void command_gradient_setLinearPen(QRegExp re);
     void command_gradient_setSpread(QRegExp re);
     void command_gradient_setCoordinateMode(QRegExp re);
diff --git a/tests/arthur/data/qps/radial_gradients_extended.qps b/tests/arthur/data/qps/radial_gradients_extended.qps
new file mode 100644
index 0000000..d80a149
--- /dev/null
+++ b/tests/arthur/data/qps/radial_gradients_extended.qps
@@ -0,0 +1,95 @@
+path_addRect path 400 0 80 80
+path_addEllipse path 440 40 60 60
+
+setRenderHint Antialiasing
+
+setPen black
+
+begin_block gradients
+gradient_clearStops
+gradient_appendStop 0    red
+gradient_appendStop 0.25 orange
+gradient_appendStop 0.5  yellow
+gradient_appendStop 0.8  green
+gradient_appendStop 1    cyan
+
+gradient_setSpread PadSpread
+gradient_setRadialExtended 0 0 20 40 40 10
+drawRect 0 0 100 100
+
+gradient_setSpread ReflectSpread
+gradient_setRadialExtended 120 20 20 140 40 10
+drawEllipse 100 0 100 100
+
+gradient_setSpread RepeatSpread
+gradient_setRadialExtended 240 20 20 260 40 10
+drawRoundRect 200 0 100 100
+
+gradient_clearStops
+gradient_appendStop 0   3f7f7fff
+gradient_appendStop 0.5 dfdfffff
+gradient_appendStop 1   7f00007f
+
+gradient_setSpread PadSpread
+gradient_setRadialExtended 320 20 20 340 40 10
+drawPolygon [300 0 390 0 350 99]
+
+gradient_setSpread ReflectSpread
+gradient_setRadialExtended 420 20 20 440 40 10
+drawPath path
+
+gradient_setSpread RepeatSpread
+gradient_setRadialExtended 520 20 20 540 40 10
+drawPie 500 0 100 100 720 4320
+end_block
+
+translate 0 100
+scale 1 2
+repeat_block gradients
+
+resetMatrix
+translate 0 300
+brushTranslate 30 0
+brushScale 0.9 0.9
+repeat_block gradients
+
+# Some helpful info perhaps?
+resetMatrix
+setPen black
+
+drawText 610 50 "No XForm"
+drawText 610 200 "scale 1x2"
+drawText 610 300 "brush transform"
+drawText 10 450 "Pad"
+drawText 110 450 "Reflect"
+drawText 210 450 "Repeat"
+drawText 310 450 "Pad w/alpha"
+drawText 410 450 "Reflect w/alpha"
+drawText 510 450 "Repeat w/alpha"
+
+# Radius and focal indicators
+setPen 3f000000
+setBrush nobrush
+
+begin_block ellipse_draw
+setClipRect 0 0 100 100
+drawEllipse -30 -30 100 100
+drawEllipse 35 35 11 11
+translate 100 0
+end_block
+
+repeat_block ellipse_draw
+repeat_block ellipse_draw
+repeat_block ellipse_draw
+repeat_block ellipse_draw
+repeat_block ellipse_draw
+
+resetMatrix
+translate 0 100
+scale 1 2
+repeat_block ellipse_draw
+repeat_block ellipse_draw
+repeat_block ellipse_draw
+repeat_block ellipse_draw
+repeat_block ellipse_draw
+repeat_block ellipse_draw
diff --git a/tests/arthur/data/qps/radial_gradients_extended_qps.png b/tests/arthur/data/qps/radial_gradients_extended_qps.png
new file mode 100644
index 0000000..45a3e60
--- /dev/null
+++ b/tests/arthur/data/qps/radial_gradients_extended_qps.png