Circles (ellipses) have been added (filled only)

[ipdf/code.git] / src / view.cpp

diff --git a/src/view.cpp b/src/view.cpp
index 587f1ba..ada42ee 100644 (file)
--- a/src/view.cpp
+++ b/src/view.cpp
@@ -84,6 +84,47 @@ using namespace std;
        "\tEndPrimitive();\n"\
        "}\n"
 
+#define CIRCLE_FILLED_GEOM \
+       "#version 150\n"\
+       "\n"\
+       "layout(lines) in;\n"\
+       "layout(triangle_strip, max_vertices = 4) out;\n"\
+       "out vec2 objcoords;\n"\
+       "\n"\
+       "void main()\n"\
+       "{\n"\
+       "\tgl_Position = gl_in[0].gl_Position;\n"\
+       "\tobjcoords = vec2(-1.0, -1.0);\n"\
+       "\tEmitVertex();\n"\
+       "\tgl_Position = vec4(gl_in[0].gl_Position.x, gl_in[1].gl_Position.y, 0.0, 1.0);\n"\
+       "\tobjcoords = vec2(-1.0, 1.0);\n"\
+       "\tEmitVertex();\n"\
+       "\tgl_Position = vec4(gl_in[1].gl_Position.x, gl_in[0].gl_Position.y, 0.0, 1.0);\n"\
+       "\tobjcoords = vec2(1.0, -1.0);\n"\
+       "\tEmitVertex();\n"\
+       "\tgl_Position = gl_in[1].gl_Position;\n"\
+       "\tobjcoords = vec2(1.0, 1.0);\n"\
+       "\tEmitVertex();\n"\
+       "\tEndPrimitive();\n"\
+       "}\n"
+
+#define CIRCLE_FRAG \
+       "#version 140\n"\
+       "\n"\
+       "in vec2 objcoords;\n"\
+       "out vec4 output_colour;\n"\
+       "\n"\
+       "uniform vec4 colour;\n"\
+       "\n"\
+       "void main()\n"\
+       "{\n"\
+       "\tif ((objcoords.x)*(objcoords.x) + (objcoords.y)*(objcoords.y) > 1.0)\n"\
+       "\t{\n"\
+       "\t\tdiscard;\n"\
+       "\t}\n"\
+       "\toutput_colour = colour;\n"\
+       "}\n"
+
 void View::Translate(Real x, Real y)
 {
        x *= m_bounds.w;
@@ -221,6 +262,11 @@ void View::Render(int width, int height)
        m_rect_outline_shader.Use();
        m_outline_ibo.Bind();
        glDrawElements(GL_LINES, m_rendered_outline*2, GL_UNSIGNED_INT, 0);
+
+       // Filled Circles
+       m_circle_filled_shader.Use();
+       m_circle_ibo.Bind();
+       glDrawElements(GL_LINES, m_rendered_circle*2, GL_UNSIGNED_INT, 0);
        glDisableVertexAttribArray(0);
        if (m_colour.a < 1.0f)
        {
@@ -294,6 +340,13 @@ void View::PrepareRender()
        m_rect_filled_shader.Use();
        glUniform4f(m_rect_filled_shader.GetUniformLocation("colour"), m_colour.r, m_colour.g, m_colour.b, m_colour.a);
 
+       m_circle_filled_shader.AttachGeometryProgram(CIRCLE_FILLED_GEOM);
+       m_circle_filled_shader.AttachVertexProgram(RECT_VERT);
+       m_circle_filled_shader.AttachFragmentProgram(CIRCLE_FRAG);
+       m_circle_filled_shader.Link();
+       m_circle_filled_shader.Use();
+       glUniform4f(m_circle_filled_shader.GetUniformLocation("colour"), m_colour.r, m_colour.g, m_colour.b, m_colour.a);
+
        m_bounds_ubo.SetType(GraphicsBuffer::BufferTypeUniform);
        m_bounds_ubo.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
 
@@ -307,27 +360,38 @@ void View::PrepareRender()
        m_filled_ibo.Resize(m_document.ObjectCount() * 2 * sizeof(uint32_t));
        BufferBuilder<uint32_t> filled_builder(m_filled_ibo.Map(false, true, true), m_filled_ibo.GetSize());
 
+       m_circle_ibo.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
+       m_circle_ibo.SetType(GraphicsBuffer::BufferTypeIndex);
+       m_circle_ibo.Resize(m_document.ObjectCount() * 2 * sizeof(uint32_t));
+       BufferBuilder<uint32_t> circle_builder(m_circle_ibo.Map(false, true, true), m_circle_ibo.GetSize());
 
-       m_rendered_filled = m_rendered_outline = 0;
+       m_rendered_filled = m_rendered_outline = m_rendered_circle = 0;
        uint32_t currentIndex = 0;
        for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
        {
-               if (m_document.m_objects.types[id] != RECT_FILLED)
+               if (m_document.m_objects.types[id] == RECT_OUTLINE)
                {
                        outline_builder.Add(currentIndex++);
                        outline_builder.Add(currentIndex++);
                        m_rendered_outline++;
                }
-               else
+               else if (m_document.m_objects.types[id] == RECT_FILLED)
                {
                        filled_builder.Add(currentIndex++);
                        filled_builder.Add(currentIndex++);
                        m_rendered_filled++;
                }
+               else
+               {
+                       circle_builder.Add(currentIndex++);
+                       circle_builder.Add(currentIndex++);
+                       m_rendered_circle++;
+               }
 
        }
        m_outline_ibo.UnMap();
        m_filled_ibo.UnMap();
+       m_circle_ibo.UnMap();
 
        m_render_inited = true;
 }