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OgreGLTexture.cpp @ 657

Revision 657, 15.2 KB checked in by mattausch, 19 years ago (diff)
added ogre dependencies and patched ogre sources

Line
1	/*
2	-----------------------------------------------------------------------------
3	This source file is part of OGRE
4	(Object-oriented Graphics Rendering Engine)
5	For the latest info, see http://ogre.sourceforge.net/
6
7	Copyright (c) 2000-2005 The OGRE Team
8	Also see acknowledgements in Readme.html
9
10	This program is free software; you can redistribute it and/or modify it under
11	the terms of the GNU Lesser General Public License as published by the Free Software
12	Foundation; either version 2 of the License, or (at your option) any later
13	version.
14
15	This program is distributed in the hope that it will be useful, but WITHOUT
16	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17	FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
18
19	You should have received a copy of the GNU Lesser General Public License along with
20	this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21	Place - Suite 330, Boston, MA 02111-1307, USA, or go to
22	http://www.gnu.org/copyleft/lesser.txt.
23	-----------------------------------------------------------------------------
24	*/
25
26	#include "OgreGLTexture.h"
27	#include "OgreGLSupport.h"
28	#include "OgreGLPixelFormat.h"
29	#include "OgreGLHardwarePixelBuffer.h"
30
31	#include "OgreTextureManager.h"
32	#include "OgreImage.h"
33	#include "OgreLogManager.h"
34	#include "OgreCamera.h"
35	#include "OgreException.h"
36	#include "OgreRoot.h"
37	#include "OgreCodec.h"
38	#include "OgreImageCodec.h"
39	#include "OgreStringConverter.h"
40
41	#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
42	# include <windows.h>
43	# include <wingdi.h>
44	#endif
45
46	namespace Ogre {
47
48	unsigned int mostSignificantBitSet(unsigned int value)
49	{
50	unsigned int result = 0;
51	while (value != 0) {
52	++result;
53	value >>= 1;
54	}
55	return result-1;
56	}
57
58	GLTexture::GLTexture(ResourceManager* creator, const String& name,
59	ResourceHandle handle, const String& group, bool isManual,
60	ManualResourceLoader* loader, GLSupport& support)
61	: Texture(creator, name, handle, group, isManual, loader),
62	mTextureID(0), mGLSupport(support)
63	{
64	}
65
66
67	GLTexture::~GLTexture()
68	{
69	// have to call this here reather than in Resource destructor
70	// since calling virtual methods in base destructors causes crash
71	if (mIsLoaded)
72	{
73	unload();
74	}
75	else
76	{
77	freeInternalResources();
78	}
79	}
80
81	GLenum GLTexture::getGLTextureTarget(void) const
82	{
83	switch(mTextureType)
84	{
85	case TEX_TYPE_1D:
86	return GL_TEXTURE_1D;
87	case TEX_TYPE_2D:
88	return GL_TEXTURE_2D;
89	case TEX_TYPE_3D:
90	return GL_TEXTURE_3D;
91	case TEX_TYPE_CUBE_MAP:
92	return GL_TEXTURE_CUBE_MAP;
93	default:
94	return 0;
95	};
96	}
97
98	//* Creation / loading methods ********************************************
99	void GLTexture::createInternalResourcesImpl(void)
100	{
101	// Adjust requested parameters to capabilities
102
103	// Check power-of-two size if required
104	unsigned int newWidth = (1 << mostSignificantBitSet(mWidth));
105	if (newWidth != mWidth)
106	newWidth <<= 1;
107
108	unsigned int newHeight = (1 << mostSignificantBitSet(mHeight));
109	if (newHeight != mHeight)
110	newHeight <<= 1;
111
112	unsigned int newDepth = (1 << mostSignificantBitSet(mDepth));
113	if (newDepth != mDepth)
114	newDepth <<= 1;
115
116	if(!Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_NON_POWER_OF_2_TEXTURES))
117	{
118	mHeight = newHeight;
119	mWidth = newWidth;
120	mDepth = newDepth;
121	}
122
123	// Check compressed texture support
124	// if a compressed format not supported, revert to PF_A8R8G8B8
125	if(PixelUtil::isCompressed(mFormat) &&
126	!Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability( RSC_TEXTURE_COMPRESSION_DXT ))
127	{
128	mFormat = PF_A8R8G8B8;
129	}
130	// if floating point textures not supported, revert to PF_A8R8G8B8
131	if(PixelUtil::isFloatingPoint(mFormat) &&
132	!Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability( RSC_TEXTURE_FLOAT ))
133	{
134	mFormat = PF_A8R8G8B8;
135	}
136
137	// Check requested number of mipmaps
138	// Zero means create mip levels until 1x1
139	size_t maxMips = GLPixelUtil::getMaxMipmaps(mWidth, mHeight, mDepth, mFormat);
140	mNumMipmaps = mNumRequestedMipmaps;
141	if(mNumMipmaps>maxMips)
142	mNumMipmaps = maxMips;
143
144	// Generate texture name
145	glGenTextures( 1, &mTextureID );
146
147	// Set texture type
148	glBindTexture( getGLTextureTarget(), mTextureID );
149
150	// This needs to be set otherwise the texture doesn't get rendered
151	glTexParameteri( getGLTextureTarget(), GL_TEXTURE_MAX_LEVEL, mNumMipmaps );
152
153	// If we can do automip generation and the user desires this, do so
154	mMipmapsHardwareGenerated =
155	Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_AUTOMIPMAP);
156	if((mUsage & TU_AUTOMIPMAP) &&
157	mNumRequestedMipmaps && mMipmapsHardwareGenerated)
158	{
159	glTexParameteri( getGLTextureTarget(), GL_GENERATE_MIPMAP, GL_TRUE );
160	}
161
162	// Allocate internal buffer so that glTexSubImageXD can be used
163	// Internal format
164	GLenum format = GLPixelUtil::getClosestGLInternalFormat(mFormat);
165	size_t width = mWidth;
166	size_t height = mHeight;
167	size_t depth = mDepth;
168	if(PixelUtil::isCompressed(mFormat))
169	{
170	// Compressed formats
171	size_t size = PixelUtil::getMemorySize(mWidth, mHeight, mDepth, mFormat);
172	// Provide temporary buffer filled with zeroes as glCompressedTexImageXD does not
173	// accept a 0 pointer like normal glTexImageXD
174	// Run through this process for every mipmap to pregenerate mipmap piramid
175	uint8 *tmpdata = new uint8[size];
176	memset(tmpdata, 0, size);
177
178	for(int mip=0; mip<=mNumMipmaps; mip++)
179	{
180	//int mip = 0;
181	size = PixelUtil::getMemorySize(width, height, depth, mFormat);
182	switch(mTextureType)
183	{
184	case TEX_TYPE_1D:
185	glCompressedTexImage1DARB_ptr(GL_TEXTURE_1D, mip, format,
186	width, 0,
187	size, tmpdata);
188	break;
189	case TEX_TYPE_2D:
190	glCompressedTexImage2DARB_ptr(GL_TEXTURE_2D, mip, format,
191	width, height, 0,
192	size, tmpdata);
193	break;
194	case TEX_TYPE_3D:
195	glCompressedTexImage3DARB_ptr(GL_TEXTURE_3D, mip, format,
196	width, height, depth, 0,
197	size, tmpdata);
198	break;
199	case TEX_TYPE_CUBE_MAP:
200	for(int face=0; face<6; face++) {
201	glCompressedTexImage2DARB_ptr(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, mip, format,
202	width, height, 0,
203	size, tmpdata);
204	}
205	break;
206	};
207	if(width>1) width = width/2;
208	if(height>1) height = height/2;
209	if(depth>1) depth = depth/2;
210	}
211	delete [] tmpdata;
212	}
213	else
214	{
215	// Run through this process to pregenerate mipmap piramid
216	for(int mip=0; mip<=mNumMipmaps; mip++)
217	{
218	// Normal formats
219	switch(mTextureType)
220	{
221	case TEX_TYPE_1D:
222	glTexImage1D(GL_TEXTURE_1D, mip, format,
223	width, 0,
224	GL_RGBA, GL_UNSIGNED_BYTE, 0);
225
226	break;
227	case TEX_TYPE_2D:
228	glTexImage2D(GL_TEXTURE_2D, mip, format,
229	width, height, 0,
230	GL_RGBA, GL_UNSIGNED_BYTE, 0);
231	break;
232	case TEX_TYPE_3D:
233	glTexImage3D(GL_TEXTURE_3D, mip, format,
234	width, height, depth, 0,
235	GL_RGBA, GL_UNSIGNED_BYTE, 0);
236	break;
237	case TEX_TYPE_CUBE_MAP:
238	for(int face=0; face<6; face++) {
239	glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, mip, format,
240	width, height, 0,
241	GL_RGBA, GL_UNSIGNED_BYTE, 0);
242	}
243	break;
244	};
245	if(width>1) width = width/2;
246	if(height>1) height = height/2;
247	if(depth>1) depth = depth/2;
248	}
249	}
250	_createSurfaceList();
251	// Get final internal format
252	mFormat = getBuffer(0,0)->getFormat();
253	}
254
255	void GLTexture::createRenderTexture(void)
256	{
257	if (this->getTextureType() != TEX_TYPE_2D)
258	OGRE_EXCEPT( Exception::UNIMPLEMENTED_FEATURE, "** Create render texture implemented only for 2D textures!!! **", "GLTexture::createRenderTexture" );
259
260	// Create the GL texture
261	// This already does everything neccessary
262	createInternalResources();
263	}
264
265	void GLTexture::loadImage( const Image& img )
266	{
267	std::vector<const Image*> images;
268
269	images.push_back(&img);
270	_loadImages(images);
271	images.clear();
272	}
273
274	void GLTexture::loadImpl()
275	{
276	if( mUsage & TU_RENDERTARGET )
277	{
278	createRenderTexture();
279	mIsLoaded = true;
280	}
281	else
282	{
283	if(mTextureType == TEX_TYPE_1D \|\| mTextureType == TEX_TYPE_2D \|\|
284	mTextureType == TEX_TYPE_3D)
285	{
286	Image img;
287	img.load(mName, mGroup);
288
289	// If this is a cube map, set the texture type flag accordingly.
290	if (img.hasFlag(IF_CUBEMAP))
291	mTextureType = TEX_TYPE_CUBE_MAP;
292	// If this is a volumetric texture set the texture type flag accordingly.
293	if(img.getDepth() > 1)
294	mTextureType = TEX_TYPE_3D;
295
296	loadImage( img );
297	}
298	else if (mTextureType == TEX_TYPE_CUBE_MAP)
299	{
300	if(StringUtil::endsWith(getName(), ".dds"))
301	{
302	// XX HACK there should be a better way to specify wether
303	// all faces are in the same file or not
304	Image img;
305	img.load(mName, mGroup);
306	loadImage( img );
307	}
308	else
309	{
310	String baseName, ext;
311	std::vector<Image> images(6);
312	std::vector<const Image*> imagePtrs;
313	static const String suffixes[6] = {"_rt", "_lf", "_up", "_dn", "_fr", "_bk"};
314
315	for(size_t i = 0; i < 6; i++)
316	{
317	size_t pos = mName.find_last_of(".");
318	baseName = mName.substr(0, pos);
319	ext = mName.substr(pos);
320	String fullName = baseName + suffixes[i] + ext;
321
322	images[i].load(fullName, mGroup);
323	imagePtrs.push_back(&images[i]);
324	}
325
326	_loadImages( imagePtrs );
327	}
328	}
329	else
330	OGRE_EXCEPT( Exception::UNIMPLEMENTED_FEATURE, "** Unknown texture type **", "GLTexture::load" );
331	}
332	}
333
334	//*************************************************************************
335
336	void GLTexture::freeInternalResourcesImpl()
337	{
338	mSurfaceList.clear();
339	glDeleteTextures( 1, &mTextureID );
340	}
341
342
343	//---------------------------------------------------------------------------------------------
344	void GLTexture::_createSurfaceList()
345	{
346	mSurfaceList.clear();
347
348	// For all faces and mipmaps, store surfaces as HardwarePixelBufferSharedPtr
349	bool wantGeneratedMips = (mUsage & TU_AUTOMIPMAP)!=0;
350
351	// Do mipmapping in software? (uses GLU) For some cards, this is still needed. Of course,
352	// only when mipmap generation is desired.
353	bool doSoftware = wantGeneratedMips && !mMipmapsHardwareGenerated && getNumMipmaps();
354
355	for(int face=0; face<getNumFaces(); face++)
356	{
357	for(int mip=0; mip<=getNumMipmaps(); mip++)
358	{
359	GLHardwarePixelBuffer *buf = new GLHardwarePixelBuffer(getGLTextureTarget(), mTextureID, face, mip,
360	static_cast<HardwareBuffer::Usage>(mUsage), doSoftware && mip==0);
361	mSurfaceList.push_back(HardwarePixelBufferSharedPtr(buf));
362
363	/// Check for error
364	if(buf->getWidth()==0 \|\| buf->getHeight()==0 \|\| buf->getDepth()==0)
365	{
366	OGRE_EXCEPT(
367	Exception::ERR_RENDERINGAPI_ERROR,
368	"Zero sized texture surface on texture "+getName()+
369	" face "+StringConverter::toString(face)+
370	" mipmap "+StringConverter::toString(mip)+
371	". Probably, the GL driver refused to create the texture.",
372	"GLTexture::_createSurfaceList");
373	}
374	}
375	}
376	}
377
378	//---------------------------------------------------------------------------------------------
379	HardwarePixelBufferSharedPtr GLTexture::getBuffer(size_t face, size_t mipmap)
380	{
381	if(face >= getNumFaces())
382	OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Face index out of range",
383	"GLTexture::getBuffer");
384	if(mipmap > mNumMipmaps)
385	OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Mipmap index out of range",
386	"GLTexture::getBuffer");
387	unsigned int idx = face*(mNumMipmaps+1) + mipmap;
388	assert(idx < mSurfaceList.size());
389	return mSurfaceList[idx];
390	}
391
392	//---------------------------------------------------------------------------------------------
393	void GLRenderTexture::_copyToTexture(void)
394	{
395	glBindTexture(GL_TEXTURE_2D, mGLTexture->getGLID());
396
397	glCopyTexSubImage2D(GL_TEXTURE_2D, mGLTexture->getNumMipmaps(), 0, 0,
398	0, 0, mWidth, mHeight);
399
400	}
401
402	void GLRenderTexture::writeContentsToFile( const String & filename )
403	{
404	ImageCodec::ImageData *imgData = new ImageCodec::ImageData();
405
406	imgData->width = mGLTexture->getWidth();
407	imgData->height = mGLTexture->getHeight();
408	imgData->depth = 1;
409	imgData->format = PF_BYTE_RGB;
410
411	// Allocate buffer
412	uchar* pBuffer = new uchar[imgData->width * imgData->height * 3];
413
414	// Read pixels
415	// I love GL: it does all the locking & colour conversion for us
416	glBindTexture(GL_TEXTURE_2D, mGLTexture->getGLID());
417	glGetTexImage(GL_TEXTURE_2D, 0, GL_RGB, GL_UNSIGNED_BYTE, pBuffer);
418
419	// Wrap buffer in a chunk
420	DataStreamPtr stream(new MemoryDataStream(
421	pBuffer, imgData->width * imgData->height * 3, false));
422
423	// Need to flip the read data over in Y though
424	Image img;
425	img.loadRawData(stream, imgData->width, imgData->height, imgData->format );
426	img.flipAroundX();
427
428	MemoryDataStreamPtr streamFlipped(
429	new MemoryDataStream(img.getData(), stream->size(), false));
430
431	// Get codec
432	size_t pos = filename.find_last_of(".");
433	String extension;
434	if( pos == String::npos )
435	OGRE_EXCEPT(
436	Exception::ERR_INVALIDPARAMS,
437	"Unable to determine image type for '" + filename + "' - invalid extension.",
438	"GLRenderTexture::writeContentsToFile" );
439
440	while( pos != filename.length() - 1 )
441	extension += filename[++pos];
442
443	// Get the codec
444	Codec * pCodec = Codec::getCodec(extension);
445
446	// Write out
447	Codec::CodecDataPtr codecDataPtr(imgData);
448	pCodec->codeToFile(streamFlipped, filename, codecDataPtr);
449
450	delete [] pBuffer;
451	}
452	#ifdef GTP_VISIBILITY_MODIFIED_OGRE
453	uchar *GLRenderTexture::getBufferContents(int &dimx, int &dimy)
454	{
455	dimx = mWidth;
456	dimy = mHeight;
457
458	// Allocate buffer
459	uchar* pBuffer = new uchar[mWidth * mHeight * 3];
460
461	// Read pixels
462	// I love GL: it does all the locking & colour conversion for us
463	glReadPixels(0, 0, mWidth-1, mHeight-1, GL_RGB, GL_UNSIGNED_BYTE, pBuffer);
464
465	return pBuffer;
466	}
467	#endif // GTP_VISIBILITY_MODIFIED_OGRE
468	}
469

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source: OGRE/trunk/ogre_changes/obsolete/RenderSystems/GL/src/OgreGLTexture.cpp @ 657

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