-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
-#include <png.h>
+#include "bindable.h"
#include "except.h"
#include "texture2d.h"
namespace Msp {
namespace GL {
-Texture2D::Texture2D()
+Texture2D::Texture2D():
+ Texture(GL_TEXTURE_2D),
+ width(0),
+ height(0),
+ allocated(0)
+{ }
+
+void Texture2D::storage(PixelFormat fmt, unsigned wd, unsigned ht)
{
- target=GL_TEXTURE_2D;
+ if(width>0)
+ throw InvalidState("Texture storage may only be specified once");
+ if(wd==0 || ht==0)
+ throw InvalidParameterValue("Invalid texture dimensions");
+
+ ifmt = fmt;
+ width = wd;
+ height = ht;
}
-/**
-Uploads an image into the texture. Direct wrapper for glTexImage2D.
-*/
-void Texture2D::image(int level, int ifmt, sizei wd, sizei ht, int border, GLenum fmt, GLenum type, void *data)
+void Texture2D::allocate(unsigned level)
{
- maybe_bind();
+ if(allocated&(1<<level))
+ return;
- glTexImage2D(target, level, ifmt, wd, ht, border, fmt, type, data);
- width_=wd;
- height_=ht;
+ image(level, get_base_pixelformat(ifmt), UNSIGNED_BYTE, 0);
}
-/**
-Uploads an image into the texture, with a simpler interface.
-*/
-void Texture2D::image(int level, sizei wd, sizei ht, TextureFormat tfmt, void *data)
+void Texture2D::image(unsigned level, PixelFormat fmt, DataType type, const void *data)
{
- int ifmt;
- int fmt;
- int type;
+ require_storage();
+
+ unsigned w = width;
+ unsigned h = height;
+ get_level_size(level, w, h);
- switch(tfmt)
+ Bind _bind(this, true);
+ glTexImage2D(target, level, ifmt, w, h, 0, fmt, type, data);
+
+ allocated |= 1<<level;
+ if(gen_mipmap && level==0)
{
- case LUMINANCE8: ifmt=GL_LUMINANCE; fmt=GL_LUMINANCE; type=GL_UNSIGNED_BYTE; break;
- case LUMINANCE8_ALPHA8: ifmt=GL_LUMINANCE_ALPHA; fmt=GL_LUMINANCE_ALPHA; type=GL_UNSIGNED_BYTE; break;
- case RGB8: ifmt=GL_RGB; fmt=GL_RGB; type=GL_UNSIGNED_BYTE; break;
- case RGBA8: ifmt=GL_RGBA; fmt=GL_RGBA; type=GL_UNSIGNED_INT_8_8_8_8_REV; break;
- case BGR8: ifmt=GL_RGB; fmt=GL_BGR; type=GL_UNSIGNED_BYTE; break;
- case BGRA8: ifmt=GL_RGBA; fmt=GL_BGRA; type=GL_UNSIGNED_INT_8_8_8_8_REV; break;
- default: throw InvalidParameterValue("Invalid texture format");
+ for(; (w || h); w>>=1, h>>=1, ++level) ;
+ allocated |= (1<<level)-1;
}
-
- image(level, ifmt, wd, ht, 0, fmt, type, data);
}
-/**
-Loads an image from a file and uploads it into the texture. Currently assumes
-the file to be a PNG image.
-*/
-void Texture2D::image(const string &fn)
+void Texture2D::sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht, PixelFormat fmt, DataType type, const void *data)
{
- FILE *file=fopen(fn.c_str(), "r");
- if(!file) throw Exception("Couldn't open "+fn);
+ require_storage();
+ allocate(level);
- char sig[8];
- fread(sig, 8, 1, file);
- if(png_sig_cmp((png_byte *)sig, 0, 8))
- throw Exception("Not a PNG image");
+ Bind _bind(this, true);
+ glTexSubImage2D(target, level, x, y, wd, ht, fmt, type, data);
+}
- png_struct *pngs=png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
- png_info *pngi=png_create_info_struct(pngs);
+void Texture2D::load_image(const string &fn)
+{
+ Graphics::Image img;
+ img.load_file(fn);
- if(setjmp(png_jmpbuf(pngs)))
- {
- png_destroy_read_struct(&pngs, &pngi, 0);
- fclose(file);
- throw Exception("PNG error");
- }
- png_init_io(pngs, file);
- png_set_sig_bytes(pngs, 8);
+ image(img);
+}
- png_read_info(pngs, pngi);
+void Texture2D::image(const Graphics::Image &img)
+{
+ unsigned w = img.get_width();
+ unsigned h = img.get_height();
+ PixelFormat fmt = pixelformat_from_graphics(img.get_format());
+ if(width==0)
+ storage(fmt, w, h);
+ else if(w!=width || h!=height)
+ throw IncompatibleData("Image does not match texture storage");
+
+ image(0, fmt, UNSIGNED_BYTE, img.get_data());
+}
- unsigned wd=png_get_image_width(pngs, pngi);
- unsigned ht=png_get_image_height(pngs, pngi);
- unsigned depth=png_get_bit_depth(pngs, pngi);
- unsigned ctype=png_get_color_type(pngs, pngi);
+void Texture2D::require_storage()
+{
+ if(width==0 || height==0)
+ throw InvalidState("Texture storage has not been specified");
+}
- if(ctype==PNG_COLOR_TYPE_PALETTE || depth<8)
- {
- png_destroy_read_struct(&pngs, &pngi, 0);
- fclose(file);
- throw Exception("Invalid color type or bit depth");
- }
+void Texture2D::get_level_size(unsigned level, unsigned &w, unsigned &h)
+{
+ w >>= level;
+ h >>= level;
- if(depth==16)
- png_set_strip_16(pngs);
+ if(!w && h)
+ w = 1;
+ else if(!h && w)
+ h = 1;
+}
- TextureFormat fmt;
- unsigned planes;
- switch(ctype)
- {
- case PNG_COLOR_TYPE_GRAY: fmt=LUMINANCE8; planes=1; break;
- case PNG_COLOR_TYPE_GRAY_ALPHA: fmt=LUMINANCE8_ALPHA8; planes=2; break;
- case PNG_COLOR_TYPE_RGB: fmt=RGB8; planes=3; break;
- case PNG_COLOR_TYPE_RGB_ALPHA: fmt=RGBA8; planes=4; break;
- default: throw Exception("Invalid color type");
- }
+Texture2D::Loader::Loader(Texture2D &t):
+ Texture::Loader(t)
+{
+ add("image_data", &Loader::image_data);
+ add("raw_data", &Loader::raw_data);
+ add("storage", &Loader::storage);
+ add("storage", &Loader::storage_b);
+}
- png_byte *data=new png_byte[wd*ht*planes];
- png_byte *row_ptrs[ht];
- for(unsigned i=0; i<ht; ++i)
- row_ptrs[i]=data+(ht-1-i)*wd*planes;
+void Texture2D::Loader::image_data(const string &data)
+{
+ Graphics::Image img;
+ img.load_memory(data.data(), data.size());
- png_read_image(pngs, row_ptrs);
+ static_cast<Texture2D &>(obj).image(img);
+}
- image(0, wd, ht, fmt, data);
- delete[] data;
+void Texture2D::Loader::raw_data(const string &data)
+{
+ Texture2D &t2d = static_cast<Texture2D &>(obj);
+ t2d.image(0, t2d.ifmt, UNSIGNED_BYTE, data.data());
+}
- png_destroy_read_struct(&pngs, &pngi, 0);
- fclose(file);
+void Texture2D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h)
+{
+ static_cast<Texture2D &>(obj).storage(fmt, w, h);
+}
+
+void Texture2D::Loader::storage_b(PixelFormat fmt, unsigned w, unsigned h, unsigned)
+{
+ storage(fmt, w, h);
}
} // namespace GL
projects / libs / gl.git / blobdiff