void SpectraDefaultGPUMatrixTransf::BeginBatch() {
using namespace oglplus;
gl_canvas->SetCurrent(*gl_context);
transf_prog.Use();
Texture::Active(0);
matrix_tex.Bind(Texture::Target::Buffer);
prog_matrix_data.Set(0);
Texture::Active(1);
input_tex.Bind(Texture::Target::Buffer);
prog_input_data.Set(1);
prog_input_size.Set(int(in_size));
vao.Bind();
Context gl;
gl.Enable(Capability::RasterizerDiscard);
}
Example(std::size_t w, std::size_t h)
: width(w)
, height(h)
, font_file("fonts", "FreeSans", ".ttf")
, font(font_file)
{
using namespace oglplus;
tex.Bind(TextureTarget::Rectangle);
fbo.Bind(FramebufferTarget::Read);
PrepareText();
}
//------------------------------------------------------------------------------
oglplus::Texture Example::MakePalette(void)
{
oglplus::Texture palette;
oglplus::Texture::Active(0);
palette.Bind(oglplus::TextureTarget::_1D);
GeneratePaletteImage();
oglplus::Texture::MinFilter(oglplus::TextureTarget::_1D, oglplus::TextureMinFilter::Linear);
oglplus::Texture::MagFilter(oglplus::TextureTarget::_1D, oglplus::TextureMagFilter::Linear);
oglplus::Texture::WrapS(oglplus::TextureTarget::_1D, oglplus::TextureWrap::Repeat);
oglplus::Texture::WrapT(oglplus::TextureTarget::_1D, oglplus::TextureWrap::Repeat);
return palette;
}
void LoadBRDFMap(const std::string& filename)
{
FREE_IMAGE_FORMAT formato = FreeImage_GetFileType(filename.c_str(), 0);
FIBITMAP* imagen = FreeImage_Load(formato, filename.c_str());
FIBITMAP* temp = imagen;
imagen = FreeImage_ConvertTo24Bits(imagen);
FreeImage_Unload(temp);
int w = FreeImage_GetWidth(imagen);
int h = FreeImage_GetHeight(imagen);
GLubyte* textura = new GLubyte[3 * w * h];
memset(textura, 0, 3 * w * h);
char* pixeles = (char*)FreeImage_GetBits(imagen);
size_t span = FreeImage_GetLine(imagen);
for(int y = 0; y < h; y++)
{
char* pCurrentImageLine = &pixeles[y * span];
GLubyte* pCurrentTextureLine = &textura [y * w * 3];
for(int x = 0; x < w; x++)
{
pCurrentTextureLine[x * 3 + 2] = pCurrentImageLine[x * 3 + 0];
pCurrentTextureLine[x * 3 + 1] = pCurrentImageLine[x * 3 + 1];
pCurrentTextureLine[x * 3 + 0] = pCurrentImageLine[x * 3 + 2];
}
}
oglplus::Texture::Active(0);
mapTexture.Bind(oglplus::TextureTarget::_2D);
oglplus::Texture::Image2D (oglplus::TextureTarget::_2D, 0, oglplus::PixelDataInternalFormat::RGB, w, h, 0, oglplus::PixelDataFormat::RGB, oglplus::DataType::UnsignedByte, textura);
oglplus::Texture::MinFilter(oglplus::TextureTarget::_2D, oglplus::TextureMinFilter::Linear);
oglplus::Texture::MagFilter(oglplus::TextureTarget::_2D, oglplus::TextureMagFilter::Linear);
oglplus::Texture::WrapS(oglplus::TextureTarget::_2D, oglplus::TextureWrap::Repeat);
oglplus::Texture::WrapT(oglplus::TextureTarget::_2D, oglplus::TextureWrap::Repeat);
delete[] textura;
FreeImage_Unload(imagen);
}