X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftexture2d.cpp;h=cee932f7231e9fb23adcfb4ce86ba28e736dd17a;hb=635e5dc;hp=e8c18bb8ea5ecf890a44eb513a8c0f2b08551ef4;hpb=84bc56b96c21c831104a22e0cbd0f3b72ab5d8c3;p=libs%2Fgl.git

diff --git a/source/texture2d.cpp b/source/texture2d.cpp
index e8c18bb8..cee932f7 100644
--- a/source/texture2d.cpp
+++ b/source/texture2d.cpp
@@ -1,5 +1,11 @@
-#include <png.h>
-#include <msp/core/error.h>
+#include <msp/core/raii.h>
+#include <msp/gl/extensions/arb_direct_state_access.h>
+#include <msp/gl/extensions/arb_texture_storage.h>
+#include "bindable.h"
+#include "buffer.h"
+#include "error.h"
+#include "pixelstore.h"
+#include "resources.h"
 #include "texture2d.h"
 
 using namespace std;
@@ -7,113 +13,287 @@ using namespace std;
 namespace Msp {
 namespace GL {
 
-Texture2D::Texture2D()
+class Texture2D::AsyncLoader: public Resource::AsyncLoader
 {
-	target=GL_TEXTURE_2D;
+private:
+	Texture2D &texture;
+	IO::Seekable &io;
+	Buffer pixel_buffer;
+	char *mapped_address;
+	Graphics::Image image;
+	unsigned n_bytes;
+	int phase;
+
+public:
+	AsyncLoader(Texture2D &, IO::Seekable &);
+
+	virtual bool needs_sync() const;
+	virtual bool process();
+};
+
+
+Texture2D::Texture2D(ResourceManager *m):
+	Texture(GL_TEXTURE_2D, m),
+	width(0),
+	height(0),
+	allocated(0)
+{ }
+
+Texture2D::~Texture2D()
+{
+	set_manager(0);
 }
 
-/**
-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::storage(PixelFormat fmt, unsigned wd, unsigned ht, unsigned lv)
 {
-	maybe_bind();
+	if(width>0)
+		throw invalid_operation("Texture2D::storage");
+	if(wd==0 || ht==0)
+		throw invalid_argument("Texture2D::storage");
 
-	glTexImage2D(target, level, ifmt, wd, ht, border, fmt, type, data);
-	width_=wd;
-	height_=ht;
+	set_format(fmt);
+	width = wd;
+	height = ht;
+	levels = get_n_levels();
+	if(lv>0)
+		levels = min(levels, lv);
 }
 
-/**
-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::allocate(unsigned level)
 {
-	int ifmt;
-	int fmt;
-	int type;
+	if(width==0 || height==0)
+		throw invalid_operation("Texture2D::allocate");
+	if(level>=levels)
+		throw invalid_argument("Texture2D::allocate");
+	if(allocated&(1<<level))
+		return;
 
-	switch(tfmt)
+	if(ARB_texture_storage)
 	{
-	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");
+		Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
+		if(ARB_direct_state_access)
+			glTextureStorage2D(id, levels, storage_fmt, width, height);
+		else
+			glTexStorage2D(target, levels, storage_fmt, width, height);
+		apply_swizzle();
+		allocated |= (1<<levels)-1;
 	}
-
-	image(level, ifmt, wd, ht, 0, fmt, type, data);
+	else
+		image(level, 0);
 }
 
-/**
-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::image(unsigned level, const void *data)
 {
-	FILE *file=fopen(fn.c_str(), "r");
-	if(!file) throw Exception("Couldn't open "+fn);
+	if(width==0 || height==0)
+		throw invalid_operation("Texture2D::image");
+
+	unsigned w = width;
+	unsigned h = height;
+	get_level_size(level, w, h);
 
-	char sig[8];
-	fread(sig, 8, 1, file);
-	if(png_sig_cmp((png_byte *)sig, 0, 8))
-		 throw Exception("Not a PNG image");
+	if(ARB_texture_storage)
+		return sub_image(level, 0, 0, w, h, data);
 
-	png_struct *pngs=png_create_read_struct(PNG_LIBPNG_VER_STRING, 0, 0, 0);
-	png_info   *pngi=png_create_info_struct(pngs);
+	BindRestore _bind(this);
 
-	if(setjmp(png_jmpbuf(pngs)))
+	if(!allocated)
 	{
-		png_destroy_read_struct(&pngs, &pngi, 0);
-		fclose(file);
-		throw Exception("PNG error");
+		glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
+		apply_swizzle();
 	}
-	png_init_io(pngs, file);
-	png_set_sig_bytes(pngs, 8);
 
-	png_read_info(pngs, pngi);
+	PixelComponents comp = get_components(storage_fmt);
+	DataType type = get_component_type(storage_fmt);
+	glTexImage2D(target, level, storage_fmt, w, h, 0, comp, type, 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);
-
-	if(ctype==PNG_COLOR_TYPE_PALETTE || depth<8)
+	allocated |= 1<<level;
+	if(auto_gen_mipmap && level==0)
 	{
-		png_destroy_read_struct(&pngs, &pngi, 0);
-		fclose(file);
-		throw Exception("Invalid color type or bit depth");
+		generate_mipmap();
+		allocated |= (1<<levels)-1;
 	}
+}
 
-	if(depth==16)
-		png_set_strip_16(pngs);
+void Texture2D::image(unsigned level, PixelComponents comp, DataType type, const void *data)
+{
+	if(comp!=get_components(format) || type!=get_component_type(format))
+		throw incompatible_data("Texture2D::image");
+	image(level, data);
+}
 
-	TextureFormat fmt;
-	unsigned planes;
+void Texture2D::sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht, const void *data)
+{
+	if(width==0 || height==0)
+		throw invalid_operation("Texture2D::sub_image");
 
-	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");
-	}
+	Conditional<BindRestore> _bind(!ARB_direct_state_access, this);
+	allocate(level);
 
-	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;
+	PixelComponents comp = get_components(storage_fmt);
+	DataType type = get_component_type(storage_fmt);
+	if(ARB_direct_state_access)
+		glTextureSubImage2D(id, level, x, y, wd, ht, comp, type, data);
+	else
+		glTexSubImage2D(target, level, x, y, wd, ht, comp, type, data);
 
-	png_read_image(pngs, row_ptrs);
+	if(auto_gen_mipmap && level==0)
+		generate_mipmap();
+}
 
-	image(0, wd, ht, fmt, data);
-	delete[] data;
+void Texture2D::sub_image(unsigned level, int x, int y, unsigned wd, unsigned ht, PixelComponents comp, DataType type, const void *data)
+{
+	if(comp!=get_components(format) || type!=get_component_type(format))
+		throw incompatible_data("Texture2D::sub_image");
+	sub_image(level, x, y, wd, ht, data);
+}
+
+void Texture2D::image(const Graphics::Image &img, unsigned lv)
+{
+	image(img, lv, false);
+}
+
+void Texture2D::image(const Graphics::Image &img, unsigned lv, bool from_buffer)
+{
+	unsigned w = img.get_width();
+	unsigned h = img.get_height();
+	PixelFormat fmt = pixelformat_from_image(img);
+	if(width==0)
+		storage(make_pixelformat(get_components(fmt), get_component_type(fmt), use_srgb_format), w, h, lv);
+	else if(w!=width || h!=height || (lv && lv!=levels))
+		throw incompatible_data("Texture2D::image");
+
+	PixelStore pstore = PixelStore::from_image(img);
+	BindRestore _bind_ps(pstore);
+
+	image(0, from_buffer ? 0 : img.get_data());
+}
+
+unsigned Texture2D::get_n_levels() const
+{
+	unsigned n = 0;
+	for(unsigned s=max(width, height); s; s>>=1, ++n) ;
+	return n;
+}
+
+void Texture2D::get_level_size(unsigned level, unsigned &w, unsigned &h) const
+{
+	w >>= level;
+	h >>= level;
+
+	if(!w && h)
+		w = 1;
+	else if(!h && w)
+		h = 1;
+}
+
+Resource::AsyncLoader *Texture2D::load(IO::Seekable &io, const Resources *)
+{
+	AsyncLoader *ldr = new AsyncLoader(*this, io);
+	return ldr;
+}
+
+UInt64 Texture2D::get_data_size() const
+{
+	return id ? width*height*get_pixel_size(format) : 0;
+}
+
+void Texture2D::unload()
+{
+	glDeleteTextures(1, &id);
+	id = 0;
+	allocated = 0;
+	default_sampler.unload();
+}
+
+
+Texture2D::Loader::Loader(Texture2D &t):
+	DataFile::DerivedObjectLoader<Texture2D, Texture::Loader>(t)
+{
+	init();
+}
+
+Texture2D::Loader::Loader(Texture2D &t, Collection &c):
+	DataFile::DerivedObjectLoader<Texture2D, Texture::Loader>(t, c)
+{
+	init();
+}
+
+void Texture2D::Loader::init()
+{
+	add("raw_data", &Loader::raw_data);
+	add("storage", &Loader::storage);
+	add("storage", &Loader::storage_levels);
+}
+
+void Texture2D::Loader::raw_data(const string &data)
+{
+	obj.image(0, data.data());
+}
+
+void Texture2D::Loader::storage(PixelFormat fmt, unsigned w, unsigned h)
+{
+	obj.storage(fmt, w, h);
+}
+
+void Texture2D::Loader::storage_levels(PixelFormat fmt, unsigned w, unsigned h, unsigned l)
+{
+	obj.storage(fmt, w, h, l);
+}
+
+
+Texture2D::AsyncLoader::AsyncLoader(Texture2D &t, IO::Seekable &i):
+	texture(t),
+	io(i),
+	pixel_buffer(PIXEL_UNPACK_BUFFER),
+	mapped_address(0),
+	phase(0)
+{ }
+
+bool Texture2D::AsyncLoader::needs_sync() const
+{
+	return phase%2;
+}
+
+bool Texture2D::AsyncLoader::process()
+{
+	if(phase==0)
+	{
+		/* TODO Enhance the ImageLoader system so that the image can be loaded
+		directly to the buffer */
+		image.load_io(io);
+		n_bytes = image.get_stride()*image.get_height();
+	}
+	else if(phase==1)
+	{
+		pixel_buffer.storage(n_bytes);
+		mapped_address = reinterpret_cast<char *>(pixel_buffer.map());
+	}
+	else if(phase==2)
+	{
+		const char *data = reinterpret_cast<const char *>(image.get_data());
+		copy(data, data+n_bytes, mapped_address);
+	}
+	else if(phase==3)
+	{
+		Bind _bind_buf(pixel_buffer, PIXEL_UNPACK_BUFFER);
+		if(!pixel_buffer.unmap())
+		{
+			phase = 1;
+			return false;
+		}
+
+		if(!texture.id)
+		{
+			if(ARB_direct_state_access)
+				glCreateTextures(texture.target, 1, &texture.id);
+			else
+				glGenTextures(1, &texture.id);
+		}
+		texture.image(image, 0, true);
+	}
 
-	png_destroy_read_struct(&pngs, &pngi, 0);
-	fclose(file);
+	++phase;
+	return phase>3;
 }
 
 } // namespace GL