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/*=========================================================================
Program: Visualization Toolkit
Module: vtkOpenGL2ContextDevice2D.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkOpenGL2ContextDevice2D.h"
#include "vtkVector.h"
#include "vtkRect.h"
#include "vtkPen.h"
#include "vtkBrush.h"
#include "vtkTextProperty.h"
#include "vtkPoints2D.h"
#include "vtkMatrix3x3.h"
#include "vtkFloatArray.h"
#include "vtkSmartPointer.h"
#include "vtkMath.h"
#include "vtkObjectFactory.h"
#include "vtkViewport.h"
#include "vtkWindow.h"
#include "vtkTexture.h"
#include "vtkImageData.h"
#include "vtkRenderer.h"
#include "vtkOpenGLRenderer.h"
#include "vtkOpenGLRenderWindow.h"
#include "vtkOpenGLExtensionManager.h"
#include "vtkShaderProgram2.h"
#include "vtkgl.h"
#include "vtkObjectFactory.h"
#include "vtkOpenGLContextDevice2DPrivate.h"
//-----------------------------------------------------------------------------
vtkStandardNewMacro(vtkOpenGL2ContextDevice2D);
//-----------------------------------------------------------------------------
bool vtkOpenGL2ContextDevice2D::IsSupported(vtkViewport *viewport)
{
bool supported = false;
vtkOpenGLRenderer *gl = vtkOpenGLRenderer::SafeDownCast(viewport);
if (gl)
{
vtkOpenGLRenderWindow *win =
vtkOpenGLRenderWindow::SafeDownCast(gl->GetRenderWindow());
vtkOpenGLExtensionManager *man = win->GetExtensionManager();
if (man->ExtensionSupported("GL_VERSION_2_0"))
{
supported = true;
}
}
if (supported)
{
// Workaround for a bug in mesa - support for non-power of two textures is
// poor at best. Disable, and use power of two textures for mesa rendering.
const char *gl_version =
reinterpret_cast<const char *>(glGetString(GL_VERSION));
const char *mesa_version = strstr(gl_version, "Mesa");
if (mesa_version != 0)
{
supported = false;
}
}
return supported;
}
//-----------------------------------------------------------------------------
vtkOpenGL2ContextDevice2D::vtkOpenGL2ContextDevice2D()
{
}
//-----------------------------------------------------------------------------
vtkOpenGL2ContextDevice2D::~vtkOpenGL2ContextDevice2D()
{
}
//-----------------------------------------------------------------------------
void vtkOpenGL2ContextDevice2D::DrawPointSprites(vtkImageData *sprite,
float *points, int n,
unsigned char *colors,
int nc_comps)
{
if (points && n > 0)
{
this->SetPointSize(this->Pen->GetWidth());
if (sprite)
{
if (!this->Storage->SpriteTexture)
{
this->Storage->SpriteTexture = vtkTexture::New();
}
int properties = this->Brush->GetTextureProperties();
this->Storage->SpriteTexture->SetInputData(sprite);
this->Storage->SpriteTexture->SetRepeat(properties & vtkContextDevice2D::Repeat);
this->Storage->SpriteTexture->SetInterpolate(properties & vtkContextDevice2D::Linear);
this->Storage->SpriteTexture->Render(this->Renderer);
}
// We can actually use point sprites here
glEnable(vtkgl::POINT_SPRITE);
glTexEnvi(vtkgl::POINT_SPRITE, vtkgl::COORD_REPLACE, GL_TRUE);
vtkgl::PointParameteri(vtkgl::POINT_SPRITE_COORD_ORIGIN, vtkgl::LOWER_LEFT);
this->DrawPoints(points, n, colors, nc_comps);
glTexEnvi(vtkgl::POINT_SPRITE, vtkgl::COORD_REPLACE, GL_FALSE);
glDisable(vtkgl::POINT_SPRITE);
if (sprite)
{
this->Storage->SpriteTexture->PostRender(this->Renderer);
glDisable(GL_TEXTURE_2D);
}
}
else
{
vtkWarningMacro(<< "Points supplied without a valid image or pointer.");
}
}
//-----------------------------------------------------------------------------
void vtkOpenGL2ContextDevice2D::DrawImage(float p[2], float scale,
vtkImageData *image)
{
this->SetTexture(image);
this->Storage->Texture->Render(this->Renderer);
int *extent = image->GetExtent();
float points[] = { p[0] , p[1],
p[0]+scale*extent[1]+1.0f, p[1],
p[0]+scale*extent[1]+1.0f, p[1]+scale*extent[3]+1.0f,
p[0] , p[1]+scale*extent[3]+1.0f };
float texCoord[] = { 0.0f, 0.0f,
1.0f, 0.0f,
1.0f, 1.0f,
0.0f, 1.0f };
glColor4ub(255, 255, 255, 255);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, &points[0]);
glTexCoordPointer(2, GL_FLOAT, 0, &texCoord[0]);
glDrawArrays(GL_QUADS, 0, 4);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
this->Storage->Texture->PostRender(this->Renderer);
glDisable(GL_TEXTURE_2D);
}
//-----------------------------------------------------------------------------
void vtkOpenGL2ContextDevice2D::DrawImage(const vtkRectf& pos,
vtkImageData *image)
{
GLuint index = this->Storage->TextureFromImage(image);
// this->SetTexture(image);
// this->Storage->Texture->Render(this->Renderer);
float points[] = { pos.GetX() , pos.GetY(),
pos.GetX() + pos.GetWidth(), pos.GetY(),
pos.GetX() + pos.GetWidth(), pos.GetY() + pos.GetHeight(),
pos.GetX() , pos.GetY() + pos.GetHeight() };
float texCoord[] = { 0.0, 0.0,
1.0, 0.0,
1.0, 1.0,
0.0, 1.0 };
glColor4ub(255, 255, 255, 255);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(2, GL_FLOAT, 0, &points[0]);
glTexCoordPointer(2, GL_FLOAT, 0, &texCoord[0]);
glDrawArrays(GL_QUADS, 0, 4);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
// this->Storage->Texture->PostRender(this->Renderer);
glDisable(GL_TEXTURE_2D);
glDeleteTextures(1, &index);
}
//----------------------------------------------------------------------------
void vtkOpenGL2ContextDevice2D::ReleaseGraphicsResources(vtkWindow *window)
{
this->vtkOpenGLContextDevice2D::ReleaseGraphicsResources(window);
}
//-----------------------------------------------------------------------------
bool vtkOpenGL2ContextDevice2D::LoadExtensions(vtkOpenGLExtensionManager *m)
{
if(m->ExtensionSupported("GL_VERSION_2_0"))
{
m->LoadExtension("GL_VERSION_1_4");
m->LoadExtension("GL_VERSION_2_0");
this->Storage->OpenGL20 = true;
this->Storage->PowerOfTwoTextures = false;
}
else
{
this->Storage->OpenGL20 = false;
}
this->Storage->GLExtensionsLoaded = true;
return this->Storage->OpenGL20;
}
//-----------------------------------------------------------------------------
void vtkOpenGL2ContextDevice2D::PrintSelf(ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
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