gui: move polyline/lineshader to gui/lineshader.{h,cc}

1 files changed, 1 insertions, 174 deletions

diff --git a/gui/fpgaviewwidget.h b/gui/fpgaviewwidget.h
index 6505c555..260ebf05 100644
--- a/gui/fpgaviewwidget.h
+++ b/gui/fpgaviewwidget.h
@@ -33,183 +33,10 @@
 #include <QWaitCondition>
 
 #include "nextpnr.h"
+#include "lineshader.h"
 
 NEXTPNR_NAMESPACE_BEGIN
 
-// Vertex2DPOD is a structure of X, Y coordinates that can be passed to OpenGL
-// directly.
-NPNR_PACKED_STRUCT(struct Vertex2DPOD {
-    GLfloat x;
-    GLfloat y;
-
-    Vertex2DPOD(GLfloat X, GLfloat Y) : x(X), y(Y) {}
-});
-
-// LineShaderData is a built set of vertices that can be rendered by the
-// LineShader.
-// Each LineShaderData can have its' own color and thickness.
-struct LineShaderData
-{
-    std::vector<Vertex2DPOD> vertices;
-    std::vector<Vertex2DPOD> normals;
-    std::vector<GLfloat> miters;
-    std::vector<GLuint> indices;
-
-    LineShaderData(void) {}
-
-    void clear(void)
-    {
-        vertices.clear();
-        normals.clear();
-        miters.clear();
-        indices.clear();
-    }
-};
-
-// PolyLine is a set of segments defined by points, that can be built to a
-// ShaderLine for GPU rendering.
-class PolyLine
-{
-  private:
-    std::vector<QVector2D> points_;
-    bool closed_;
-
-    void buildPoint(LineShaderData *building, const QVector2D *prev, const QVector2D *cur, const QVector2D *next) const;
-
-  public:
-    // Create an empty PolyLine.
-    PolyLine(bool closed = false) : closed_(closed) {}
-
-    // Create a non-closed polyline consisting of one segment.
-    PolyLine(float x0, float y0, float x1, float y1) : closed_(false)
-    {
-        point(x0, y0);
-        point(x1, y1);
-    }
-
-    // Add a point to the PolyLine.
-    void point(float x, float y) { points_.push_back(QVector2D(x, y)); }
-
-    // Built PolyLine to shader data.
-    void build(LineShaderData &target) const;
-
-    // Set whether line is closed (ie. a loop).
-    void setClosed(bool closed) { closed_ = closed; }
-};
-
-// LineShader is an OpenGL shader program that renders LineShaderData on the
-// GPU.
-// The LineShader expects two vertices per line point. It will push those
-// vertices along the given normal * miter. This is used to 'stretch' the line
-// to be as wide as the given thickness. The normal and miter are calculated
-// by the PolyLine build method in order to construct a constant thickness line
-// with miter edge joints.
-//
-//        +------+------+
-//
-//               |
-//        PolyLine.build()
-//               |
-//               V
-//
-//        ^      ^      ^
-//        |      |      |    <--- normal vectors (x2, pointing in the same
-//       +/+----+/+----+/+        direction)
-//
-//               |
-//         vertex shader
-//               |
-//               V
-//
-//        +------+------+ ^ by normal * miter * thickness/2
-//        |      |      |
-//        +------+------+ V by normal * miter * thickness/2
-//
-//                         (miter is flipped for every second vertex generated)
-class LineShader
-{
-  private:
-    QObject *parent_;
-    QOpenGLShaderProgram *program_;
-
-    // GL attribute locations.
-    struct
-    {
-        // original position of line vertex
-        GLuint position;
-        // normal by which vertex should be translated
-        GLuint normal;
-        // scalar defining:
-        // - how stretched the normal vector should be to
-        //   compensate for bends
-        // - which way the normal should be applied (+1 for one vertex, -1
-        //   for the other)
-        GLuint miter;
-    } attributes_;
-
-    // GL buffers
-    struct
-    {
-        QOpenGLBuffer position;
-        QOpenGLBuffer normal;
-        QOpenGLBuffer miter;
-        QOpenGLBuffer index;
-    } buffers_;
-
-    // GL uniform locations.
-    struct
-    {
-        // combines m/v/p matrix to apply
-        GLuint projection;
-        // desired thickness of line
-        GLuint thickness;
-        // color of line
-        GLuint color;
-    } uniforms_;
-
-    QOpenGLVertexArrayObject vao_;
-
-  public:
-    LineShader(QObject *parent) : parent_(parent), program_(nullptr)
-    {
-        buffers_.position = QOpenGLBuffer(QOpenGLBuffer::VertexBuffer);
-        buffers_.position.setUsagePattern(QOpenGLBuffer::StaticDraw);
-
-        buffers_.normal = QOpenGLBuffer(QOpenGLBuffer::VertexBuffer);
-        buffers_.normal.setUsagePattern(QOpenGLBuffer::StaticDraw);
-
-        buffers_.miter = QOpenGLBuffer(QOpenGLBuffer::VertexBuffer);
-        buffers_.miter.setUsagePattern(QOpenGLBuffer::StaticDraw);
-
-        buffers_.index = QOpenGLBuffer(QOpenGLBuffer::IndexBuffer);
-        buffers_.index.setUsagePattern(QOpenGLBuffer::StaticDraw);
-    }
-
-    static constexpr const char *vertexShaderSource_ =
-            "#version 110\n"
-            "attribute highp vec2  position;\n"
-            "attribute highp vec2  normal;\n"
-            "attribute highp float miter;\n"
-            "uniform   highp float thickness;\n"
-            "uniform   highp mat4  projection;\n"
-            "void main() {\n"
-            "   vec2 p = position.xy + vec2(normal * thickness/2.0 / miter);\n"
-            "   gl_Position = projection * vec4(p, 0.0, 1.0);\n"
-            "}\n";
-
-    static constexpr const char *fragmentShaderSource_ = "#version 110\n"
-                                                         "uniform   lowp  vec4  color;\n"
-                                                         "void main() {\n"
-                                                         "   gl_FragColor = color;\n"
-                                                         "}\n";
-
-    // Must be called on initialization.
-    bool compile(void);
-
-    // Render a LineShaderData with a given M/V/P transformation.
-    void draw(const LineShaderData &data, const QColor &color, float thickness, const QMatrix4x4 &projection);
-};
-
 class PeriodicRunner : public QThread
 {
     Q_OBJECT