kwin: Add GLSL 1.40 versions of the scene shaders

Adjust ShaderManager to load the 1.40 versions when GLSL 1.40
is supported.

lanczosfilter.cpp

@@ -84,7 +84,10 @@ void LanczosFilter::init()
         if (gl->isRadeon() && gl->chipClass() < R600)
             return;
     }
-    m_shader.reset(ShaderManager::instance()->loadFragmentShader(ShaderManager::SimpleShader, ":/resources/shaders/1.10/lanczos-fragment.glsl"));
+    m_shader.reset(ShaderManager::instance()->loadFragmentShader(ShaderManager::SimpleShader,
+                                                                 gl->glslVersion() >= kVersionNumber(1, 40) ?
+                                                                 ":/resources/shaders/1.40/lanczos-fragment.glsl" :
+                                                                 ":/resources/shaders/1.10/lanczos-fragment.glsl"));
     if (m_shader->isValid()) {
         ShaderBinder binder(m_shader.data());
         m_uTexUnit    = m_shader->uniformLocation("texUnit");

libkwineffects/kwinglutils.cpp

@@ -791,12 +791,12 @@ void ShaderManager::popShader()
 GLShader *ShaderManager::loadFragmentShader(ShaderType vertex, const QString &fragmentFile)
 {
     const char *vertexFile[] = {
-        ":/resources/shaders/1.10/scene-vertex.glsl",
-        ":/resources/shaders/1.10/scene-generic-vertex.glsl",
-        ":/resources/shaders/1.10/scene-color-vertex.glsl"
+        "scene-vertex.glsl",
+        "scene-generic-vertex.glsl",
+        "scene-color-vertex.glsl"
     };
 
-    GLShader *shader = new GLShader(vertexFile[vertex], fragmentFile);
+    GLShader *shader = new GLShader(m_shaderDir + vertexFile[vertex], fragmentFile);
 
     if (shader->isValid()) {
         pushShader(shader);
@@ -811,12 +811,12 @@ GLShader *ShaderManager::loadVertexShader(ShaderType fragment, const QString &ve
 {
     // The Simple and Generic shaders use same fragment shader
     const char *fragmentFile[] = {
-        ":/resources/shaders/1.10/scene-fragment.glsl",
-        ":/resources/shaders/1.10/scene-fragment.glsl",
-        ":/resources/shaders/1.10/scene-color-fragment.glsl"
+        "scene-fragment.glsl",
+        "scene-fragment.glsl",
+        "scene-color-fragment.glsl"
     };
 
-    GLShader *shader = new GLShader(vertexFile, fragmentFile[fragment]);
+    GLShader *shader = new GLShader(vertexFile, m_shaderDir + fragmentFile[fragment]);
 
     if (shader->isValid()) {
         pushShader(shader);
@@ -837,22 +837,29 @@ GLShader *ShaderManager::loadShaderFromCode(const QByteArray &vertexSource, cons
 void ShaderManager::initShaders()
 {
     const char *vertexFile[] = {
-        ":/resources/shaders/1.10/scene-vertex.glsl",
-        ":/resources/shaders/1.10/scene-generic-vertex.glsl",
-        ":/resources/shaders/1.10/scene-color-vertex.glsl",
+        "scene-vertex.glsl",
+        "scene-generic-vertex.glsl",
+        "scene-color-vertex.glsl",
     };
 
     const char *fragmentFile[] = {
-        ":/resources/shaders/1.10/scene-fragment.glsl",
-        ":/resources/shaders/1.10/scene-fragment.glsl",
-        ":/resources/shaders/1.10/scene-color-fragment.glsl",
+        "scene-fragment.glsl",
+        "scene-fragment.glsl",
+        "scene-color-fragment.glsl",
     };
 
+#ifndef KWIN_HAVE_OPENGLES
+    if (GLPlatform::instance()->glslVersion() >= kVersionNumber(1, 40))
+        m_shaderDir = ":/resources/shaders/1.40/";
+    else
+#endif
+        m_shaderDir = ":/resources/shaders/1.10/";
+
     // Be optimistic
     m_valid = true;
 
     for (int i = 0; i < 3; i++) {
-        m_shader[i] = new GLShader(vertexFile[i], fragmentFile[i]);
+        m_shader[i] = new GLShader(m_shaderDir + vertexFile[i], m_shaderDir + fragmentFile[i]);
 
         if (!m_shader[i]->isValid()) {
             m_valid = false;

libkwineffects/kwinglutils.h

@@ -396,6 +396,7 @@ private:
     bool m_inited;
     bool m_valid;
     bool m_debug;
+    QByteArray m_shaderDir;
     static ShaderManager *s_shaderManager;
 };
 

resources.qrc

@@ -6,5 +6,12 @@
   <file>shaders/1.10/scene-color-vertex.glsl</file>
   <file>shaders/1.10/scene-color-fragment.glsl</file>
   <file>shaders/1.10/scene-generic-vertex.glsl</file>
-</qresource>
+
+  <file>shaders/1.40/lanczos-fragment.glsl</file>
+  <file>shaders/1.40/scene-vertex.glsl</file>
+  <file>shaders/1.40/scene-fragment.glsl</file>
+  <file>shaders/1.40/scene-color-vertex.glsl</file>
+  <file>shaders/1.40/scene-color-fragment.glsl</file>
+  <file>shaders/1.40/scene-generic-vertex.glsl</file>
+  </qresource>
 </RCC>

shaders/1.40/lanczos-fragment.glsl

@@ -0,0 +1,19 @@
+#version 140
+
+uniform sampler2D texUnit;
+uniform vec2 offsets[16];
+uniform vec4 kernel[16];
+
+in vec2 varyingTexCoords;
+out vec4 fragColor;
+
+void main(void)
+{
+    vec4 sum = texture(texUnit, varyingTexCoords.st) * kernel[0];
+    for (int i = 1; i < 16; i++) {
+        sum += texture(texUnit, varyingTexCoords.st - offsets[i]) * kernel[i];
+        sum += texture(texUnit, varyingTexCoords.st + offsets[i]) * kernel[i];
+    }
+    fragColor = sum;
+}
+

shaders/1.40/scene-color-fragment.glsl

@@ -0,0 +1,10 @@
+#version 140
+
+uniform vec4 geometryColor;
+
+out vec4 fragColor;
+
+void main()
+{
+    fragColor = geometryColor;
+}

shaders/1.40/scene-color-vertex.glsl

@@ -0,0 +1,13 @@
+#version 140
+
+uniform mat4 projection;
+
+// offset of the window/texture to be rendered
+uniform vec2 offset;
+
+in vec4 vertex;
+
+void main()
+{
+    gl_Position = projection * vec4(vertex.xy + offset, vertex.zw);
+}

shaders/1.40/scene-fragment.glsl

@@ -0,0 +1,26 @@
+#version 140
+
+uniform sampler2D sampler;
+uniform vec4 modulation;
+uniform float saturation;
+
+in vec2 varyingTexCoords;
+
+out vec4 fragColor;
+
+void main()
+{
+    vec4 tex = texture(sampler, varyingTexCoords);
+
+    if (saturation != 1.0) {
+        tex.rgb = mix(vec3(dot(vec3(0.30, 0.59, 0.11), tex.rgb)), tex.rgb, saturation);
+    }
+
+    tex *= modulation;
+
+#ifdef KWIN_SHADER_DEBUG
+    tex.g = min(tex.g + 0.5, 1.0);
+#endif
+
+    fragColor = tex;
+}

shaders/1.40/scene-generic-vertex.glsl

@@ -0,0 +1,17 @@
+#version 140
+
+uniform mat4 projection;
+uniform mat4 modelview;
+uniform mat4 screenTransformation;
+uniform mat4 windowTransformation;
+
+in vec4 vertex;
+in vec2 texCoord;
+
+out vec2 varyingTexCoords;
+
+void main()
+{
+    varyingTexCoords = texCoord;
+    gl_Position = projection * (modelview * screenTransformation * windowTransformation) * vertex;
+}

shaders/1.40/scene-vertex.glsl

@@ -0,0 +1,17 @@
+#version 140
+
+uniform mat4 projection;
+
+// offset of the window/texture to be rendered
+uniform vec2 offset;
+
+in vec4 vertex;
+in vec2 texCoord;
+
+out vec2 varyingTexCoords;
+
+void main()
+{
+    varyingTexCoords = texCoord;
+    gl_Position = projection * vec4(vertex.xy + offset, vertex.zw);
+}