2 #include "bufferbuilder.h"
11 * Allocates memory for ObjectRenderers
12 * @param document - The document to associate the View with
13 * @param bounds - Initial bounds of the View
14 * @param colour - Colour to use for rendering this view. TODO: Make sure this actually works, or just remove it
16 View::View(Document & document, Screen & screen, const Rect & bounds, const Colour & colour)
17 : m_use_gpu_transform(USE_GPU_TRANSFORM), m_use_gpu_rendering(USE_GPU_RENDERING), m_bounds_dirty(true), m_buffer_dirty(true),
18 m_render_dirty(true), m_document(document), m_screen(screen), m_cached_display(), m_bounds(bounds), m_colour(colour), m_bounds_ubo(),
19 m_objbounds_vbo(), m_object_renderers(NUMBER_OF_OBJECT_TYPES), m_cpu_rendering_pixels(NULL)
21 Debug("View Created - Bounds => {%s}", m_bounds.Str().c_str());
23 // Create ObjectRenderers - new's match delete's in View::~View
24 //TODO: Don't forget to put new renderers here or things will be segfaultastic
25 m_object_renderers[RECT_FILLED] = new RectFilledRenderer();
26 m_object_renderers[RECT_OUTLINE] = new RectOutlineRenderer();
27 m_object_renderers[CIRCLE_FILLED] = new CircleFilledRenderer();
28 m_object_renderers[BEZIER] = new BezierRenderer();
30 // To add rendering for a new type of object;
31 // 1. Add enum to ObjectType in ipdf.h
32 // 2. Implement class inheriting from ObjectRenderer using that type in objectrenderer.h and objectrenderer.cpp
37 #ifndef QUADTREE_DISABLED
38 m_quadtree_max_depth = 1;
39 m_current_quadtree_node = document.GetQuadTree().root_id;
45 * Frees memory used by ObjectRenderers
49 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
51 delete m_object_renderers[i]; // delete's match new's in constructor
53 m_object_renderers.clear();
54 delete [] m_cpu_rendering_pixels;
59 * @param x, y - Amount to translate
61 void View::Translate(Real x, Real y)
67 Debug("View Bounds => %s", m_bounds.Str().c_str());
68 if (!m_use_gpu_transform)
69 m_buffer_dirty = true;
70 m_bounds_dirty = true;
74 * Scale the View at a point
75 * @param x, y - Coordinates to scale at (eg: Mouse cursor position)
76 * @param scale_amount - Amount to scale by
78 void View::ScaleAroundPoint(Real x, Real y, Real scale_amount)
80 // x and y are coordinates in the window
81 // Convert to local coords.
87 Real top = y - m_bounds.y;
88 Real left = x - m_bounds.x;
93 m_bounds.x = x - left;
95 m_bounds.w *= scale_amount;
96 m_bounds.h *= scale_amount;
97 //Debug("Scale at {%s, %s} by %s View Bounds => %s", x.Str().c_str(), y.Str().c_str(), scale_amount.Str().c_str(), m_bounds.Str().c_str());
98 if (!m_use_gpu_transform)
99 m_buffer_dirty = true;
100 m_bounds_dirty = true;
104 * Transform a point in the document to a point relative to the top left corner of the view
105 * This is the CPU coordinate transform code; used only if the CPU is doing coordinate transforms
106 * @param inp - Input Rect {x,y,w,h} in the document
107 * @returns output Rect {x,y,w,h} in the View
109 Rect View::TransformToViewCoords(const Rect& inp) const
112 out.x = (inp.x - m_bounds.x) / m_bounds.w;
113 out.y = (inp.y - m_bounds.y) / m_bounds.h;
114 out.w = inp.w / m_bounds.w;
115 out.h = inp.h / m_bounds.h;
121 * Updates FrameBuffer if the document, object bounds, or view bounds have changed, then Blits it
122 * Otherwise just Blits the cached FrameBuffer
123 * @param width - Width of View to render
124 * @param height - Height of View to render
126 void View::Render(int width, int height)
128 // View dimensions have changed (ie: Window was resized)
129 int prev_width = m_cached_display.GetWidth();
130 int prev_height = m_cached_display.GetHeight();
131 if (width != prev_width || height != prev_height)
133 m_cached_display.Create(width, height);
134 m_bounds_dirty = true;
137 // View bounds have not changed; blit the FrameBuffer as it is
140 m_cached_display.UnBind();
141 m_cached_display.Blit();
145 // Bind FrameBuffer for rendering, and clear it
148 if (m_render_dirty) // document has changed
151 if (m_buffer_dirty) // object bounds have changed
152 UpdateObjBoundsVBO();
154 if (m_use_gpu_transform)
156 GLfloat glbounds[] = {static_cast<GLfloat>(Float(m_bounds.x)), static_cast<GLfloat>(Float(m_bounds.y)), static_cast<GLfloat>(Float(m_bounds.w)), static_cast<GLfloat>(Float(m_bounds.h)),
157 0.0, 0.0, 640.0, 480.0};
158 m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
162 GLfloat glbounds[] = {0.0f, 0.0f, 1.0f, 1.0f,
163 0.0f, 0.0f, 640.0f, 480.0f};
164 m_bounds_ubo.Upload(sizeof(float)*8, glbounds);
166 m_bounds_dirty = false;
168 m_cached_display.Bind(); //NOTE: This is redundant; Clear already calls Bind
169 m_cached_display.Clear();
171 // When we QuadTree, this will be magic.
173 int last_obj = m_document.ObjectCount();
176 if (m_use_gpu_rendering)
178 if (m_colour.a < 1.0f)
181 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
183 m_objbounds_vbo.Bind();
185 glEnableVertexAttribArray(0);
186 glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, 0);
188 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
190 m_object_renderers[i]->RenderUsingGPU(first_obj, last_obj);
193 glDisableVertexAttribArray(0);
194 if (m_colour.a < 1.0f)
199 else // Rasterise on CPU then blit texture to GPU
201 // Dynamically resize CPU rendering target pixels if needed
202 if (m_cpu_rendering_pixels == NULL || width*height > prev_width*prev_height)
204 delete [] m_cpu_rendering_pixels;
205 m_cpu_rendering_pixels = new uint8_t[width*height*4];
206 if (m_cpu_rendering_pixels == NULL)
207 Fatal("Could not allocate %d*%d*4 = %d bytes for cpu rendered pixels", width, height, width*height*4);
209 // Clear CPU rendering pixels
210 for (int i = 0; i < width*height*4; ++i)
211 m_cpu_rendering_pixels[i] = 255;
213 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
215 m_object_renderers[i]->RenderUsingCPU(m_document.m_objects, *this, {m_cpu_rendering_pixels, width, height}, first_obj, last_obj);
217 m_screen.RenderPixels(0,0,width, height, m_cpu_rendering_pixels); //TODO: Make this work :(
218 // Debug for great victory (do something similar for GPU and compare?)
219 ObjectRenderer::SaveBMP({m_cpu_rendering_pixels, width, height}, "cpu_rendering_last_frame.bmp");
221 m_cached_display.UnBind(); // resets render target to the screen
222 m_cached_display.Blit(); // blit FrameBuffer to screen
225 void View::UpdateObjBoundsVBO()
227 m_objbounds_vbo.Invalidate();
228 m_objbounds_vbo.SetType(GraphicsBuffer::BufferTypeVertex);
229 if (m_use_gpu_transform)
231 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
235 m_objbounds_vbo.SetUsage(GraphicsBuffer::BufferUsageDynamicDraw);
237 m_objbounds_vbo.Resize(m_document.ObjectCount()*sizeof(GPUObjBounds));
239 BufferBuilder<GPUObjBounds> obj_bounds_builder(m_objbounds_vbo.Map(false, true, true), m_objbounds_vbo.GetSize());
241 for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
244 if (m_use_gpu_transform)
246 obj_bounds = m_document.m_objects.bounds[id];
250 obj_bounds = TransformToViewCoords(m_document.m_objects.bounds[id]);
252 GPUObjBounds gpu_bounds = {
253 (float)Float(obj_bounds.x),
254 (float)Float(obj_bounds.y),
255 (float)Float(obj_bounds.x + obj_bounds.w),
256 (float)Float(obj_bounds.y + obj_bounds.h)
258 obj_bounds_builder.Add(gpu_bounds);
261 m_objbounds_vbo.UnMap();
262 m_buffer_dirty = false;
265 * Prepare the document for rendering
266 * Will be called on View::Render if m_render_dirty is set
267 * (Called at least once, on the first Render)
269 void View::PrepareRender()
271 Debug("Recreate buffers with %u objects", m_document.ObjectCount());
272 // Prepare bounds vbo
273 m_bounds_ubo.Invalidate();
274 m_bounds_ubo.SetType(GraphicsBuffer::BufferTypeUniform);
275 m_bounds_ubo.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
277 // Instead of having each ObjectRenderer go through the whole document
278 // we initialise them, go through the document once adding to the appropriate Renderers
279 // and then finalise them
280 // This will totally be efficient if we have like, a lot of distinct ObjectTypes. Which could totally happen. You never know.
282 // Prepare the buffers
283 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
285 m_object_renderers[i]->PrepareBuffers(m_document.ObjectCount());
288 // Add objects from Document to buffers
289 for (unsigned id = 0; id < m_document.ObjectCount(); ++id)
291 ObjectType type = m_document.m_objects.types[id];
292 m_object_renderers.at(type)->AddObjectToBuffers(id); // Use at() in case the document is corrupt TODO: Better error handling?
293 // (Also, Wow I just actually used std::vector::at())
294 // (Also, I just managed to make it throw an exception because I'm a moron)
295 Debug("Object of type %d", type);
298 // Finish the buffers
299 for (unsigned i = 0; i < m_object_renderers.size(); ++i)
301 m_object_renderers[i]->FinaliseBuffers();
303 dynamic_cast<BezierRenderer*>(m_object_renderers[BEZIER])->PrepareBezierGPUBuffer(m_document.m_objects);
304 m_render_dirty = false;