--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/glCompiler.cpp Sat Aug 29 17:07:39 2015 +0300
@@ -0,0 +1,423 @@
+/*
+ * LDForge: LDraw parts authoring CAD
+ * Copyright (C) 2013, 2014 Teemu Piippo
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define GL_GLEXT_PROTOTYPES
+#include <GL/glu.h>
+#include <GL/glext.h>
+#include "glCompiler.h"
+#include "ldObject.h"
+#include "colors.h"
+#include "ldDocument.h"
+#include "miscallenous.h"
+#include "glRenderer.h"
+#include "dialogs.h"
+
+struct GLErrorInfo
+{
+ GLenum value;
+ QString text;
+};
+
+static const GLErrorInfo g_GLErrors[] =
+{
+ { GL_NO_ERROR, "No error" },
+ { GL_INVALID_ENUM, "Unacceptable enumerator passed" },
+ { GL_INVALID_VALUE, "Numeric argument out of range" },
+ { GL_INVALID_OPERATION, "The operation is not allowed to be done in this state" },
+ { GL_INVALID_FRAMEBUFFER_OPERATION, "Framebuffer object is not complete"},
+ { GL_OUT_OF_MEMORY, "Out of memory" },
+ { GL_STACK_UNDERFLOW, "The operation would have caused an underflow" },
+ { GL_STACK_OVERFLOW, "The operation would have caused an overflow" },
+};
+
+CFGENTRY (String, SelectColorBlend, "#0080FF")
+EXTERN_CFGENTRY (Bool, BlackEdges)
+EXTERN_CFGENTRY (String, BackgroundColor)
+
+static QList<int> g_warnedColors;
+static const QColor g_BFCFrontColor (64, 192, 80);
+static const QColor g_BFCBackColor (208, 64, 64);
+
+// static QMap<LDObject*, String> g_objectOrigins;
+
+// =============================================================================
+//
+void CheckGLErrorImpl (const char* file, int line)
+{
+ QString errmsg;
+ GLenum errnum = glGetError();
+
+ if (errnum == GL_NO_ERROR)
+ return;
+
+ for (const GLErrorInfo& err : g_GLErrors)
+ {
+ if (err.value == errnum)
+ {
+ errmsg = err.text;
+ break;
+ }
+ }
+
+ print ("OpenGL ERROR: at %1:%2: %3", Basename (QString (file)), line, errmsg);
+}
+
+// =============================================================================
+//
+GLCompiler::GLCompiler (GLRenderer* renderer) :
+ m_renderer (renderer)
+{
+ needMerge();
+ memset (m_vboSizes, 0, sizeof m_vboSizes);
+}
+
+// =============================================================================
+//
+void GLCompiler::initialize()
+{
+ initializeOpenGLFunctions();
+ glGenBuffers (g_numVBOs, &m_vbo[0]);
+ CHECK_GL_ERROR();
+}
+
+// =============================================================================
+//
+GLCompiler::~GLCompiler()
+{
+ glDeleteBuffers (g_numVBOs, &m_vbo[0]);
+ CHECK_GL_ERROR();
+
+ if (m_renderer != null)
+ m_renderer->setCompiler (null);
+}
+
+// =============================================================================
+//
+uint32 GLCompiler::colorToRGB (const QColor& color)
+{
+ return
+ (color.red() & 0xFF) << 0x00 |
+ (color.green() & 0xFF) << 0x08 |
+ (color.blue() & 0xFF) << 0x10 |
+ (color.alpha() & 0xFF) << 0x18;
+}
+
+// =============================================================================
+//
+QColor GLCompiler::indexColorForID (int id) const
+{
+ // Calculate a color based from this index. This method caters for
+ // 16777216 objects. I don't think that will be exceeded anytime soon. :)
+ int r = (id / 0x10000) % 0x100,
+ g = (id / 0x100) % 0x100,
+ b = id % 0x100;
+
+ return QColor (r, g, b);
+}
+
+// =============================================================================
+//
+QColor GLCompiler::getColorForPolygon (LDPolygon& poly, LDObject* topobj,
+ EVBOComplement complement) const
+{
+ QColor qcol;
+
+ switch (complement)
+ {
+ case VBOCM_Surfaces:
+ case VBOCM_NumComplements:
+ return QColor();
+
+ case VBOCM_BFCFrontColors:
+ qcol = g_BFCFrontColor;
+ break;
+
+ case VBOCM_BFCBackColors:
+ qcol = g_BFCBackColor;
+ break;
+
+ case VBOCM_PickColors:
+ return indexColorForID (topobj->id());
+
+ case VBOCM_RandomColors:
+ qcol = topobj->randomColor();
+ break;
+
+ case VBOCM_NormalColors:
+ if (poly.color == MainColor)
+ {
+ if (topobj->color() == MainColor)
+ qcol = GLRenderer::getMainColor();
+ else
+ qcol = topobj->color().faceColor();
+ }
+ else if (poly.color == EdgeColor)
+ {
+ qcol = Luma (QColor (cfg::BackgroundColor)) > 40 ? Qt::black : Qt::white;
+ }
+ else
+ {
+ LDColor col = poly.color;
+
+ if (col.isValid())
+ qcol = col.faceColor();
+ }
+ break;
+ }
+
+ if (not qcol.isValid())
+ {
+ // The color was unknown. Use main color to make the polygon at least
+ // not appear pitch-black.
+ if (poly.num != 2 and poly.num != 5)
+ qcol = GLRenderer::getMainColor();
+ else
+ qcol = Qt::black;
+
+ // Warn about the unknown color, but only once.
+ if (not g_warnedColors.contains (poly.color))
+ {
+ print ("Unknown color %1!\n", poly.color);
+ g_warnedColors << poly.color;
+ }
+
+ return qcol;
+ }
+
+ double blendAlpha = 0.0;
+
+ if (topobj->isSelected())
+ blendAlpha = 1.0;
+ else if (topobj == m_renderer->objectAtCursor())
+ blendAlpha = 0.5;
+
+ if (blendAlpha != 0.0)
+ {
+ QColor selcolor (cfg::SelectColorBlend);
+ double denom = blendAlpha + 1.0;
+ qcol.setRed ((qcol.red() + (selcolor.red() * blendAlpha)) / denom);
+ qcol.setGreen ((qcol.green() + (selcolor.green() * blendAlpha)) / denom);
+ qcol.setBlue ((qcol.blue() + (selcolor.blue() * blendAlpha)) / denom);
+ }
+
+ return qcol;
+}
+
+// =============================================================================
+//
+void GLCompiler::needMerge()
+{
+ for (int i = 0; i < countof (m_vboChanged); ++i)
+ m_vboChanged[i] = true;
+}
+
+// =============================================================================
+//
+void GLCompiler::stageForCompilation (LDObject* obj)
+{
+ /*
+ g_objectOrigins[obj] = format ("%1:%2 (%3)",
+ obj->document()->getDisplayName(), obj->lineNumber(), obj->typeName());
+ */
+
+ m_staged << obj;
+}
+
+// =============================================================================
+//
+void GLCompiler::unstage (LDObject* obj)
+{
+ m_staged.removeOne (obj);
+}
+
+// =============================================================================
+//
+void GLCompiler::compileDocument (LDDocument* doc)
+{
+ if (doc != null)
+ {
+ for (LDObject* obj : doc->objects())
+ compileObject (obj);
+ }
+}
+
+// =============================================================================
+//
+void GLCompiler::compileStaged()
+{
+ RemoveDuplicates (m_staged);
+
+ for (auto it = m_staged.begin(); it != m_staged.end(); ++it)
+ {
+ if (*it == null)
+ continue;
+
+ compileObject (*it);
+ }
+
+ m_staged.clear();
+}
+
+// =============================================================================
+//
+void GLCompiler::prepareVBO (int vbonum)
+{
+ // Compile anything that still awaits it
+ compileStaged();
+
+ if (not m_vboChanged[vbonum])
+ return;
+
+ QVector<GLfloat> vbodata;
+
+ for (auto it = m_objectInfo.begin(); it != m_objectInfo.end();)
+ {
+ if (it.key() == null)
+ {
+ it = m_objectInfo.erase (it);
+ continue;
+ }
+
+ if (it.key()->document() == CurrentDocument()
+ and not it.key()->isHidden())
+ {
+ vbodata += it->data[vbonum];
+ }
+
+ ++it;
+ }
+
+ glBindBuffer (GL_ARRAY_BUFFER, m_vbo[vbonum]);
+ glBufferData (GL_ARRAY_BUFFER, vbodata.size() * sizeof(GLfloat), vbodata.constData(), GL_STATIC_DRAW);
+ glBindBuffer (GL_ARRAY_BUFFER, 0);
+ CHECK_GL_ERROR();
+ m_vboChanged[vbonum] = false;
+ m_vboSizes[vbonum] = vbodata.size();
+}
+
+// =============================================================================
+//
+void GLCompiler::dropObject (LDObject* obj)
+{
+ auto it = m_objectInfo.find (obj);
+
+ if (it != m_objectInfo.end())
+ {
+ m_objectInfo.erase (it);
+ needMerge();
+ }
+
+ unstage (obj);
+}
+
+// =============================================================================
+//
+void GLCompiler::compileObject (LDObject* obj)
+{
+// print ("Compile %1\n", g_objectOrigins[obj]);
+
+ if (obj == null or obj->document() == null or obj->document()->isImplicit())
+ return;
+
+ ObjectVBOInfo info;
+ info.isChanged = true;
+ dropObject (obj);
+
+ switch (obj->type())
+ {
+ // Note: We cannot split quads into triangles here, it would mess up the
+ // wireframe view. Quads must go into separate vbos.
+ case OBJ_Triangle:
+ case OBJ_Quad:
+ case OBJ_Line:
+ case OBJ_CondLine:
+ {
+ LDPolygon* poly = obj->getPolygon();
+ poly->id = obj->id();
+ compilePolygon (*poly, obj, &info);
+ delete poly;
+ break;
+ }
+
+ case OBJ_Subfile:
+ {
+ LDSubfile* ref = static_cast<LDSubfile*> (obj);
+ auto data = ref->inlinePolygons();
+
+ for (LDPolygon& poly : data)
+ {
+ poly.id = obj->id();
+ compilePolygon (poly, obj, &info);
+ }
+ break;
+ }
+
+ default:
+ break;
+ }
+
+ m_objectInfo[obj] = info;
+ needMerge();
+}
+
+// =============================================================================
+//
+void GLCompiler::compilePolygon (LDPolygon& poly, LDObject* topobj, ObjectVBOInfo* objinfo)
+{
+ EVBOSurface surface;
+ int numverts;
+
+ switch (poly.num)
+ {
+ case 2: surface = VBOSF_Lines; numverts = 2; break;
+ case 3: surface = VBOSF_Triangles; numverts = 3; break;
+ case 4: surface = VBOSF_Quads; numverts = 4; break;
+ case 5: surface = VBOSF_CondLines; numverts = 2; break;
+ default: return;
+ }
+
+ for (EVBOComplement complement = VBOCM_First; complement < VBOCM_NumComplements; ++complement)
+ {
+ const int vbonum = vboNumber (surface, complement);
+ QVector<GLfloat>& vbodata = objinfo->data[vbonum];
+ const QColor color = getColorForPolygon (poly, topobj, complement);
+
+ for (int vert = 0; vert < numverts; ++vert)
+ {
+ if (complement == VBOCM_Surfaces)
+ {
+ // Write coordinates. Apparently Z must be flipped too?
+ vbodata << poly.vertices[vert].x()
+ << -poly.vertices[vert].y()
+ << -poly.vertices[vert].z();
+ }
+ else
+ {
+ vbodata << ((GLfloat) color.red()) / 255.0f
+ << ((GLfloat) color.green()) / 255.0f
+ << ((GLfloat) color.blue()) / 255.0f
+ << ((GLfloat) color.alpha()) / 255.0f;
+ }
+ }
+ }
+}
+
+void GLCompiler::setRenderer (GLRenderer* renderer)
+{
+ m_renderer = renderer;
+}