Port 17 effects to RHI, remove 8 unportable ones

The following are based on static shader code, and after porting the
shaders they will work fully identically to 5.15:

FastBlur
Colorize
OpacityMask
BrightnessContrast
ColorOverlay
Desaturate
Displace
GammaAdjust
HueSaturation
LevelAdjust
RectangularGlow
Thresholdmask
LinearGradient
RadialGradient
ConicalGradient

The following change behavior:

Glow
DropShadow

These now only have the fast variants, because those rely on static shader code.
So we are going back to the Qt 5.5 versions and make them behave as if 'fast'
was always set to true. The 'fast' and 'samples' properties are removed.

The following are removed:

Blend
GaussianBlur
DirectionalBlur
MaskedBlur
RadialBlur
RecursiveBlur
ZoomBlur
InnerShadow

The autotest and the gallery application (run qmlscene testBed.qml in
tests/manual/testbed) have been adjusted accordingly and now work across
all QRhi backends.

The docs may still refer to removed effects in some code snippets. Updating
that is left as a separate exercise.

[ChangeLog] Graphical Effects no longer relies on dynamically generated
shader strings. The following effects have been removed: Blend, GaussianBlur,
MaskedBlur, RadialBlur, RecursiveBlur, ZoomBlur, InnerShadow. Glow
and DropShadow always use the 'fast' variant. The fast and samples
properties for these are thus no longer applicable and have been
removed.

Change-Id: Ife83f3828f37977596fd34f8da8b61961f0ed28a
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Reviewed-by: Andy Nichols <andy.nichols@qt.io>

1 files changed, 0 insertions, 53 deletions

diff --git a/src/effects/shaders/+glslcore/fastmaskedblur.frag b/src/effects/shaders/+glslcore/fastmaskedblur.frag
deleted file mode 100644
index ae4d628..0000000
--- a/src/effects/shaders/+glslcore/fastmaskedblur.frag
+++ /dev/null
@@ -1,53 +0,0 @@
-#version 150 core
-uniform sampler2D mask;
-uniform sampler2D source1;
-uniform sampler2D source2;
-uniform sampler2D source3;
-uniform sampler2D source4;
-uniform sampler2D source5;
-uniform sampler2D source6;
-uniform float lod;
-uniform float qt_Opacity;
-in vec2 qt_TexCoord0;
-out vec4 fragColor;
-
-float weight(float v) {
-    if (v <= 0.0)
-        return 1.0;
-
-    if (v >= 0.5)
-        return 0.0;
-
-    return 1.0 - v * 2.0;
-}
-
-void main() {
-
-    vec4 maskColor = texture(mask, qt_TexCoord0);
-    float l = lod * maskColor.a;
-
-    float w1 = weight(abs(l - 0.100));
-    float w2 = weight(abs(l - 0.300));
-    float w3 = weight(abs(l - 0.500));
-    float w4 = weight(abs(l - 0.700));
-    float w5 = weight(abs(l - 0.900));
-    float w6 = weight(abs(l - 1.100));
-
-    float sum = w1 + w2 + w3 + w4 + w5 + w6;
-    float weight1 = w1 / sum;
-    float weight2 = w2 / sum;
-    float weight3 = w3 / sum;
-    float weight4 = w4 / sum;
-    float weight5 = w5 / sum;
-    float weight6 = w6 / sum;
-
-    vec4 sourceColor = texture(source1, qt_TexCoord0) * weight1;
-    sourceColor += texture(source2, qt_TexCoord0) * weight2;
-    sourceColor += texture(source3, qt_TexCoord0) * weight3;
-    sourceColor += texture(source4, qt_TexCoord0) * weight4;
-    sourceColor += texture(source5, qt_TexCoord0) * weight5;
-    sourceColor += texture(source6, qt_TexCoord0) * weight6;
-
-    fragColor = sourceColor * qt_Opacity;
-
-}