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OgreGLTexture.cpp @ 692

Revision 692, 12.8 KB checked in by mattausch, 19 years ago (diff)
adding ogre 1.2 and dependencies

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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	#include "OgreBitwise.h"
41
42	#include "OgreGLFBORenderTexture.h"
43
44	#if OGRE_PLATFORM == OGRE_PLATFORM_WIN32
45	# include <windows.h>
46	# include <wingdi.h>
47	#endif
48
49	namespace Ogre {
50
51
52
53	GLTexture::GLTexture(ResourceManager* creator, const String& name,
54	ResourceHandle handle, const String& group, bool isManual,
55	ManualResourceLoader* loader, GLSupport& support)
56	: Texture(creator, name, handle, group, isManual, loader),
57	mTextureID(0), mGLSupport(support)
58	{
59	}
60
61
62	GLTexture::~GLTexture()
63	{
64	// have to call this here reather than in Resource destructor
65	// since calling virtual methods in base destructors causes crash
66	if (mIsLoaded)
67	{
68	unload();
69	}
70	else
71	{
72	freeInternalResources();
73	}
74	}
75
76	GLenum GLTexture::getGLTextureTarget(void) const
77	{
78	switch(mTextureType)
79	{
80	case TEX_TYPE_1D:
81	return GL_TEXTURE_1D;
82	case TEX_TYPE_2D:
83	return GL_TEXTURE_2D;
84	case TEX_TYPE_3D:
85	return GL_TEXTURE_3D;
86	case TEX_TYPE_CUBE_MAP:
87	return GL_TEXTURE_CUBE_MAP;
88	default:
89	return 0;
90	};
91	}
92
93	//* Creation / loading methods ********************************************
94	void GLTexture::createInternalResourcesImpl(void)
95	{
96	// Convert to nearest power-of-two size if required
97	mWidth = GLPixelUtil::optionalPO2(mWidth);
98	mHeight = GLPixelUtil::optionalPO2(mHeight);
99	mDepth = GLPixelUtil::optionalPO2(mDepth);
100
101
102	// Adjust format if required
103	mFormat = TextureManager::getSingleton().getNativeFormat(mTextureType, mFormat, mUsage);
104
105	// Check requested number of mipmaps
106	size_t maxMips = GLPixelUtil::getMaxMipmaps(mWidth, mHeight, mDepth, mFormat);
107	mNumMipmaps = mNumRequestedMipmaps;
108	if(mNumMipmaps>maxMips)
109	mNumMipmaps = maxMips;
110
111	// Generate texture name
112	glGenTextures( 1, &mTextureID );
113
114	// Set texture type
115	glBindTexture( getGLTextureTarget(), mTextureID );
116
117	// This needs to be set otherwise the texture doesn't get rendered
118	glTexParameteri( getGLTextureTarget(), GL_TEXTURE_MAX_LEVEL, mNumMipmaps );
119
120	// Set some misc default parameters so NVidia won't complain, these can of course be changed later
121	glTexParameteri(getGLTextureTarget(), GL_TEXTURE_MIN_FILTER, GL_NEAREST);
122	glTexParameteri(getGLTextureTarget(), GL_TEXTURE_MAG_FILTER, GL_NEAREST);
123	glTexParameteri(getGLTextureTarget(), GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
124	glTexParameteri(getGLTextureTarget(), GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
125
126	// If we can do automip generation and the user desires this, do so
127	mMipmapsHardwareGenerated =
128	Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_AUTOMIPMAP);
129	if((mUsage & TU_AUTOMIPMAP) &&
130	mNumRequestedMipmaps && mMipmapsHardwareGenerated)
131	{
132	glTexParameteri( getGLTextureTarget(), GL_GENERATE_MIPMAP, GL_TRUE );
133	}
134
135	// Allocate internal buffer so that glTexSubImageXD can be used
136	// Internal format
137	GLenum format = GLPixelUtil::getClosestGLInternalFormat(mFormat);
138	size_t width = mWidth;
139	size_t height = mHeight;
140	size_t depth = mDepth;
141	#if 0
142	/** Luckily, this hack seems not to be needed; empty compressed textures can very well be created the
143	conventional way with glTexImageXD.
144	*/
145	if(PixelUtil::isCompressed(mFormat))
146	{
147	// Compressed formats
148	size_t size = PixelUtil::getMemorySize(mWidth, mHeight, mDepth, mFormat);
149	// Provide temporary buffer filled with zeroes as glCompressedTexImageXD does not
150	// accept a 0 pointer like normal glTexImageXD
151	// Run through this process for every mipmap to pregenerate mipmap piramid
152	uint8 *tmpdata = new uint8[size];
153	memset(tmpdata, 0, size);
154
155	for(int mip=0; mip<=mNumMipmaps; mip++)
156	{
157	//int mip = 0;
158	size = PixelUtil::getMemorySize(width, height, depth, mFormat);
159	switch(mTextureType)
160	{
161	case TEX_TYPE_1D:
162	glCompressedTexImage1DARB(GL_TEXTURE_1D, mip, format,
163	width, 0,
164	size, tmpdata);
165	break;
166	case TEX_TYPE_2D:
167	glCompressedTexImage2DARB(GL_TEXTURE_2D, mip, format,
168	width, height, 0,
169	size, tmpdata);
170	break;
171	case TEX_TYPE_3D:
172	glCompressedTexImage3DARB(GL_TEXTURE_3D, mip, format,
173	width, height, depth, 0,
174	size, tmpdata);
175	break;
176	case TEX_TYPE_CUBE_MAP:
177	for(int face=0; face<6; face++) {
178	glCompressedTexImage2DARB(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, mip, format,
179	width, height, 0,
180	size, tmpdata);
181	}
182	break;
183	};
184	if(width>1) width = width/2;
185	if(height>1) height = height/2;
186	if(depth>1) depth = depth/2;
187	}
188	delete [] tmpdata;
189	}
190	else
191	#endif
192	{
193	// Run through this process to pregenerate mipmap piramid
194	for(int mip=0; mip<=mNumMipmaps; mip++)
195	{
196	// Normal formats
197	switch(mTextureType)
198	{
199	case TEX_TYPE_1D:
200	glTexImage1D(GL_TEXTURE_1D, mip, format,
201	width, 0,
202	GL_RGBA, GL_UNSIGNED_BYTE, 0);
203
204	break;
205	case TEX_TYPE_2D:
206	glTexImage2D(GL_TEXTURE_2D, mip, format,
207	width, height, 0,
208	GL_RGBA, GL_UNSIGNED_BYTE, 0);
209	break;
210	case TEX_TYPE_3D:
211	glTexImage3D(GL_TEXTURE_3D, mip, format,
212	width, height, depth, 0,
213	GL_RGBA, GL_UNSIGNED_BYTE, 0);
214	break;
215	case TEX_TYPE_CUBE_MAP:
216	for(int face=0; face<6; face++) {
217	glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X + face, mip, format,
218	width, height, 0,
219	GL_RGBA, GL_UNSIGNED_BYTE, 0);
220	}
221	break;
222	};
223	if(width>1) width = width/2;
224	if(height>1) height = height/2;
225	if(depth>1) depth = depth/2;
226	}
227	}
228	_createSurfaceList();
229	// Get final internal format
230	mFormat = getBuffer(0,0)->getFormat();
231	}
232
233	void GLTexture::createRenderTexture(void)
234	{
235	// Create the GL texture
236	// This already does everything neccessary
237	createInternalResources();
238	}
239
240	void GLTexture::loadImage( const Image& img )
241	{
242	std::vector<const Image*> images;
243
244	images.push_back(&img);
245	_loadImages(images);
246	images.clear();
247	}
248
249	void GLTexture::loadImpl()
250	{
251	if( mUsage & TU_RENDERTARGET )
252	{
253	createRenderTexture();
254	mIsLoaded = true;
255	}
256	else
257	{
258	String baseName, ext;
259	size_t pos = mName.find_last_of(".");
260	if( pos == String::npos )
261	OGRE_EXCEPT(
262	Exception::ERR_INVALIDPARAMS,
263	"Unable to load image file '"+ mName + "' - invalid extension.",
264	"GLTexture::loadImpl" );
265
266	baseName = mName.substr(0, pos);
267	ext = mName.substr(pos+1);
268
269	if(mTextureType == TEX_TYPE_1D \|\| mTextureType == TEX_TYPE_2D \|\|
270	mTextureType == TEX_TYPE_3D)
271	{
272	Image img;
273	// find & load resource data intro stream to allow resource
274	// group changes if required
275	DataStreamPtr dstream =
276	ResourceGroupManager::getSingleton().openResource(
277	mName, mGroup, true, this);
278
279	img.load(dstream, ext);
280
281	// If this is a cube map, set the texture type flag accordingly.
282	if (img.hasFlag(IF_CUBEMAP))
283	mTextureType = TEX_TYPE_CUBE_MAP;
284	// If this is a volumetric texture set the texture type flag accordingly.
285	if(img.getDepth() > 1)
286	mTextureType = TEX_TYPE_3D;
287
288	loadImage( img );
289	}
290	else if (mTextureType == TEX_TYPE_CUBE_MAP)
291	{
292	if(StringUtil::endsWith(getName(), ".dds"))
293	{
294	// XX HACK there should be a better way to specify whether
295	// all faces are in the same file or not
296	Image img;
297	// find & load resource data intro stream to allow resource
298	// group changes if required
299	DataStreamPtr dstream =
300	ResourceGroupManager::getSingleton().openResource(
301	mName, mGroup, true, this);
302
303	img.load(dstream, ext);
304	loadImage( img );
305	}
306	else
307	{
308	std::vector<Image> images(6);
309	std::vector<const Image*> imagePtrs;
310	static const String suffixes[6] = {"_rt", "_lf", "_up", "_dn", "_fr", "_bk"};
311
312	for(size_t i = 0; i < 6; i++)
313	{
314	String fullName = baseName + suffixes[i] + "." + ext;
315	// find & load resource data intro stream to allow resource
316	// group changes if required
317	DataStreamPtr dstream =
318	ResourceGroupManager::getSingleton().openResource(
319	fullName, mGroup, true, this);
320
321	images[i].load(dstream, ext);
322	imagePtrs.push_back(&images[i]);
323	}
324
325	_loadImages( imagePtrs );
326	}
327	}
328	else
329	OGRE_EXCEPT( Exception::UNIMPLEMENTED_FEATURE, "** Unknown texture type **", "GLTexture::load" );
330	}
331	}
332
333	//*************************************************************************
334
335	void GLTexture::freeInternalResourcesImpl()
336	{
337	mSurfaceList.clear();
338	glDeleteTextures( 1, &mTextureID );
339	}
340
341
342	//---------------------------------------------------------------------------------------------
343	void GLTexture::_createSurfaceList()
344	{
345	mSurfaceList.clear();
346
347	// For all faces and mipmaps, store surfaces as HardwarePixelBufferSharedPtr
348	bool wantGeneratedMips = (mUsage & TU_AUTOMIPMAP)!=0;
349
350	// Do mipmapping in software? (uses GLU) For some cards, this is still needed. Of course,
351	// only when mipmap generation is desired.
352	bool doSoftware = wantGeneratedMips && !mMipmapsHardwareGenerated && getNumMipmaps();
353
354	for(int face=0; face<getNumFaces(); face++)
355	{
356	for(int mip=0; mip<=getNumMipmaps(); mip++)
357	{
358	GLHardwarePixelBuffer *buf = new GLTextureBuffer(mName, getGLTextureTarget(), mTextureID, face, mip,
359	static_cast<HardwareBuffer::Usage>(mUsage), doSoftware && mip==0);
360	mSurfaceList.push_back(HardwarePixelBufferSharedPtr(buf));
361
362	/// Check for error
363	if(buf->getWidth()==0 \|\| buf->getHeight()==0 \|\| buf->getDepth()==0)
364	{
365	OGRE_EXCEPT(
366	Exception::ERR_RENDERINGAPI_ERROR,
367	"Zero sized texture surface on texture "+getName()+
368	" face "+StringConverter::toString(face)+
369	" mipmap "+StringConverter::toString(mip)+
370	". Probably, the GL driver refused to create the texture.",
371	"GLTexture::_createSurfaceList");
372	}
373	}
374	}
375	}
376
377	//---------------------------------------------------------------------------------------------
378	HardwarePixelBufferSharedPtr GLTexture::getBuffer(size_t face, size_t mipmap)
379	{
380	if(face >= getNumFaces())
381	OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Face index out of range",
382	"GLTexture::getBuffer");
383	if(mipmap > mNumMipmaps)
384	OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Mipmap index out of range",
385	"GLTexture::getBuffer");
386	unsigned int idx = face*(mNumMipmaps+1) + mipmap;
387	assert(idx < mSurfaceList.size());
388	return mSurfaceList[idx];
389	}
390
391	}
392

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source: OGRE/trunk/ogrenew/RenderSystems/GL/src/OgreGLTexture.cpp @ 692

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