C++ (Cpp) DrawFlippedOES Examples

Example #1

File: Texture.cpp Project: Adrien81/XCSoar

void
GLTexture::DrawFlipped(PixelRect dest, PixelRect src) const
{
#ifdef HAVE_OES_DRAW_TEXTURE
  if (OpenGL::oes_draw_texture) {
    DrawFlippedOES(dest, src);
    return;
  }
#endif

  const RasterPoint vertices[] = {
    dest.GetTopLeft(),
    dest.GetTopRight(),
    dest.GetBottomLeft(),
    dest.GetBottomRight(),
  };

  const ScopeVertexPointer vp(vertices);

  const PixelSize allocated = GetAllocatedSize();
  GLfloat x0 = (GLfloat)src.left / allocated.cx;
  GLfloat y0 = (GLfloat)src.top / allocated.cy;
  GLfloat x1 = (GLfloat)src.right / allocated.cx;
  GLfloat y1 = (GLfloat)src.bottom / allocated.cy;

  const GLfloat coord[] = {
    x0, y1,
    x1, y1,
    x0, y0,
    x1, y0,
  };

#ifdef USE_GLSL
  glEnableVertexAttribArray(OpenGL::Attribute::TEXCOORD);
  glVertexAttribPointer(OpenGL::Attribute::TEXCOORD, 2, GL_FLOAT, GL_FALSE,
                        0, coord);
#else
  glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  glTexCoordPointer(2, GL_FLOAT, 0, coord);
#endif

  glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);

#ifdef USE_GLSL
  glDisableVertexAttribArray(OpenGL::Attribute::TEXCOORD);
  OpenGL::solid_shader->Use();
#else
  glDisableClientState(GL_TEXTURE_COORD_ARRAY);
#endif
}

Example #2

File: Texture.cpp Project: j-konopka/XCSoar-TE

void
GLTexture::DrawFlipped(PixelRect dest, PixelRect src) const
{
#ifdef HAVE_OES_DRAW_TEXTURE
  if (OpenGL::oes_draw_texture) {
    DrawFlippedOES(dest, src);
    return;
  }
#endif

  const RasterPoint vertices[] = {
    dest.GetTopLeft(),
    dest.GetTopRight(),
    dest.GetBottomLeft(),
    dest.GetBottomRight(),
  };

  glVertexPointer(2, GL_VALUE, 0, vertices);

  const PixelSize allocated = GetAllocatedSize();
  GLfloat x0 = (GLfloat)src.left / allocated.cx;
  GLfloat y0 = (GLfloat)src.top / allocated.cy;
  GLfloat x1 = (GLfloat)src.right / allocated.cx;
  GLfloat y1 = (GLfloat)src.bottom / allocated.cy;

  const GLfloat coord[] = {
    x0, y1,
    x1, y1,
    x0, y0,
    x1, y0,
  };

  glEnableClientState(GL_TEXTURE_COORD_ARRAY);
  glTexCoordPointer(2, GL_FLOAT, 0, coord);
  glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
  glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}