/RenderSystems/GLES/src/OgreGLESHardwarePixelBuffer.cpp
C++ | 834 lines | 601 code | 85 blank | 148 comment | 105 complexity | b8966a781647d39795024fdb45b961fd MD5 | raw file
Possible License(s): MIT, LGPL-2.1
- /*
- -----------------------------------------------------------------------------
- This source file is part of OGRE
- (Object-oriented Graphics Rendering Engine)
- For the latest info, see http://www.ogre3d.org/
- Copyright (c) 2008 Renato Araujo Oliveira Filho <renatox@gmail.com>
- Copyright (c) 2000-2009 Torus Knot Software Ltd
- Permission is hereby granted, free of charge, to any person obtaining a copy
- of this software and associated documentation files (the "Software"), to deal
- in the Software without restriction, including without limitation the rights
- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- copies of the Software, and to permit persons to whom the Software is
- furnished to do so, subject to the following conditions:
- The above copyright notice and this permission notice shall be included in
- all copies or substantial portions of the Software.
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- THE SOFTWARE.
- -----------------------------------------------------------------------------
- */
- #include "OgreRenderSystem.h"
- #include "OgreGLESRenderTexture.h"
- #include "OgreGLESHardwarePixelBuffer.h"
- #include "OgreGLESPixelFormat.h"
- #include "OgreGLESFBORenderTexture.h"
- #include "OgreRoot.h"
- static int computeLog(GLuint value)
- {
- int i;
- i = 0;
- /* Error! */
- if (value == 0) return -1;
- for (;;)
- {
- if (value & 1)
- {
- /* Error! */
- if (value != 1) return -1;
- return i;
- }
- value = value >> 1;
- i++;
- }
- }
- namespace Ogre {
- GLESHardwarePixelBuffer::GLESHardwarePixelBuffer(size_t mWidth, size_t mHeight,
- size_t mDepth, PixelFormat mFormat,
- HardwareBuffer::Usage usage)
- : HardwarePixelBuffer(mWidth, mHeight, mDepth, mFormat, usage, false, false),
- mBuffer(mWidth, mHeight, mDepth, mFormat),
- mGLInternalFormat(0)
- {
- }
- GLESHardwarePixelBuffer::~GLESHardwarePixelBuffer()
- {
- // Force free buffer
- OGRE_DELETE [] (uint8*)mBuffer.data;
- }
- void GLESHardwarePixelBuffer::allocateBuffer()
- {
- if (mBuffer.data)
- // Already allocated
- return;
- mBuffer.data = OGRE_NEW_FIX_FOR_WIN32 uint8[mSizeInBytes];
- // TODO use PBO if we're HBU_DYNAMIC
- }
- void GLESHardwarePixelBuffer::freeBuffer()
- {
- // Free buffer if we're STATIC to save memory
- if (mUsage & HBU_STATIC)
- {
- OGRE_DELETE [] (uint8*)mBuffer.data;
- mBuffer.data = 0;
- }
- }
- PixelBox GLESHardwarePixelBuffer::lockImpl(const Image::Box lockBox, LockOptions options)
- {
- allocateBuffer();
- if (options != HardwareBuffer::HBL_DISCARD &&
- (mUsage & HardwareBuffer::HBU_WRITE_ONLY) == 0)
- {
- // Download the old contents of the texture
- download(mBuffer);
- }
- mCurrentLockOptions = options;
- mLockedBox = lockBox;
- return mBuffer.getSubVolume(lockBox);
- }
- void GLESHardwarePixelBuffer::unlockImpl(void)
- {
- if (mCurrentLockOptions != HardwareBuffer::HBL_READ_ONLY)
- {
- // From buffer to card, only upload if was locked for writing
- upload(mCurrentLock, mLockedBox);
- }
- freeBuffer();
- }
- void GLESHardwarePixelBuffer::blitFromMemory(const PixelBox &src, const Image::Box &dstBox)
- {
- if (!mBuffer.contains(dstBox))
- {
- OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
- "Destination box out of range",
- "GLESHardwarePixelBuffer::blitFromMemory");
- }
- PixelBox scaled;
- if (src.getWidth() != dstBox.getWidth() ||
- src.getHeight() != dstBox.getHeight() ||
- src.getDepth() != dstBox.getDepth())
- {
- // Scale to destination size. Use DevIL and not iluScale because ILU screws up for
- // floating point textures and cannot cope with 3D images.
- // This also does pixel format conversion if needed
- allocateBuffer();
- scaled = mBuffer.getSubVolume(dstBox);
- Image::scale(src, scaled, Image::FILTER_BILINEAR);
- }
- else if ((src.format != mFormat) ||
- ((GLESPixelUtil::getGLOriginFormat(src.format) == 0) && (src.format != PF_R8G8B8)))
- {
- // Extents match, but format is not accepted as valid source format for GL
- // do conversion in temporary buffer
- allocateBuffer();
- scaled = mBuffer.getSubVolume(dstBox);
- PixelUtil::bulkPixelConversion(src, scaled);
- if(mFormat == PF_A4R4G4B4)
- {
- // ARGB->BGRA
- GLESPixelUtil::convertToGLformat(scaled, scaled);
- }
- }
- else
- {
- allocateBuffer();
- scaled = src;
- if (src.format == PF_R8G8B8)
- {
- scaled.format = PF_B8G8R8;
- PixelUtil::bulkPixelConversion(src, scaled);
- }
- }
- upload(scaled, dstBox);
- freeBuffer();
- }
- void GLESHardwarePixelBuffer::blitToMemory(const Image::Box &srcBox, const PixelBox &dst)
- {
- if (!mBuffer.contains(srcBox))
- {
- OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
- "source box out of range",
- "GLESHardwarePixelBuffer::blitToMemory");
- }
- if (srcBox.left == 0 && srcBox.right == getWidth() &&
- srcBox.top == 0 && srcBox.bottom == getHeight() &&
- srcBox.front == 0 && srcBox.back == getDepth() &&
- dst.getWidth() == getWidth() &&
- dst.getHeight() == getHeight() &&
- dst.getDepth() == getDepth() &&
- GLESPixelUtil::getGLOriginFormat(dst.format) != 0)
- {
- // The direct case: the user wants the entire texture in a format supported by GL
- // so we don't need an intermediate buffer
- download(dst);
- }
- else
- {
- // Use buffer for intermediate copy
- allocateBuffer();
- // Download entire buffer
- download(mBuffer);
- if(srcBox.getWidth() != dst.getWidth() ||
- srcBox.getHeight() != dst.getHeight() ||
- srcBox.getDepth() != dst.getDepth())
- {
- // We need scaling
- Image::scale(mBuffer.getSubVolume(srcBox), dst, Image::FILTER_BILINEAR);
- }
- else
- {
- // Just copy the bit that we need
- PixelUtil::bulkPixelConversion(mBuffer.getSubVolume(srcBox), dst);
- }
- freeBuffer();
- }
- }
- void GLESHardwarePixelBuffer::upload(const PixelBox &data, const Image::Box &dest)
- {
- OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
- "Upload not possible for this pixelbuffer type",
- "GLESHardwarePixelBuffer::upload");
- }
- void GLESHardwarePixelBuffer::download(const PixelBox &data)
- {
- OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
- "Download not possible for this pixelbuffer type",
- "GLESHardwarePixelBuffer::download");
- }
- void GLESHardwarePixelBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset)
- {
- OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR,
- "Framebuffer bind not possible for this pixelbuffer type",
- "GLESHardwarePixelBuffer::bindToFramebuffer");
- }
- // TextureBuffer
- GLESTextureBuffer::GLESTextureBuffer(const String &baseName, GLenum target, GLuint id,
- GLint width, GLint height, GLint internalFormat, GLenum format,
- GLint face, GLint level, Usage usage, bool crappyCard,
- bool writeGamma, uint fsaa)
- : GLESHardwarePixelBuffer(0, 0, 0, PF_UNKNOWN, usage),
- mTarget(target), mTextureID(id), mFace(face), mLevel(level), mSoftwareMipmap(crappyCard)
- {
- GL_CHECK_ERROR;
- glBindTexture(GL_TEXTURE_2D, mTextureID);
- GL_CHECK_ERROR;
- // Get face identifier
- mFaceTarget = mTarget;
- // Calculate the width and height of the texture at this mip level
- mWidth = mLevel == 0 ? width : width / pow(2, level);
- mHeight = mLevel == 0 ? height : height / pow(2, level);
- if(mWidth < 1)
- mWidth = 1;
- if(mHeight < 1)
- mHeight = 1;
-
- // Only 2D is supported so depth is always 1
- mDepth = 1;
- mGLInternalFormat = internalFormat;
- mFormat = GLESPixelUtil::getClosestOGREFormat(internalFormat, format);
- mRowPitch = mWidth;
- mSlicePitch = mHeight*mWidth;
- mSizeInBytes = PixelUtil::getMemorySize(mWidth, mHeight, mDepth, mFormat);
- // Log a message
- // std::stringstream str;
- // str << "GLESHardwarePixelBuffer constructed for texture " << mTextureID
- // << " face " << mFace << " level " << mLevel << ": "
- // << "width=" << mWidth << " height="<< mHeight << " depth=" << mDepth
- // << "format=" << PixelUtil::getFormatName(mFormat);
- // LogManager::getSingleton().logMessage(LML_NORMAL, str.str());
- // Set up a pixel box
- mBuffer = PixelBox(mWidth, mHeight, mDepth, mFormat);
-
- if (mWidth==0 || mHeight==0 || mDepth==0)
- // We are invalid, do not allocate a buffer
- return;
- // Is this a render target?
- if (mUsage & TU_RENDERTARGET)
- {
- // Create render target for each slice
- mSliceTRT.reserve(mDepth);
- for(size_t zoffset=0; zoffset<mDepth; ++zoffset)
- {
- String name;
- name = "rtt/" + StringConverter::toString((size_t)this) + "/" + baseName;
- GLESSurfaceDesc target;
- target.buffer = this;
- target.zoffset = zoffset;
- RenderTexture *trt = GLESRTTManager::getSingleton().createRenderTexture(name, target, writeGamma, fsaa);
- mSliceTRT.push_back(trt);
- Root::getSingleton().getRenderSystem()->attachRenderTarget(*mSliceTRT[zoffset]);
- }
- }
- }
- GLESTextureBuffer::~GLESTextureBuffer()
- {
- if (mUsage & TU_RENDERTARGET)
- {
- // Delete all render targets that are not yet deleted via _clearSliceRTT because the rendertarget
- // was deleted by the user.
- for (SliceTRT::const_iterator it = mSliceTRT.begin(); it != mSliceTRT.end(); ++it)
- {
- Root::getSingleton().getRenderSystem()->destroyRenderTarget((*it)->getName());
- }
- }
- }
- void GLESTextureBuffer::upload(const PixelBox &data, const Image::Box &dest)
- {
- glBindTexture(mTarget, mTextureID);
- GL_CHECK_ERROR;
- if (PixelUtil::isCompressed(data.format))
- {
- if(data.format != mFormat || !data.isConsecutive())
- OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
- "Compressed images must be consecutive, in the source format",
- "GLESTextureBuffer::upload");
- GLenum format = GLESPixelUtil::getClosestGLInternalFormat(mFormat);
- // Data must be consecutive and at beginning of buffer as PixelStorei not allowed
- // for compressed formats
- if (dest.left == 0 && dest.top == 0)
- {
- glCompressedTexImage2D(GL_TEXTURE_2D, mLevel,
- format,
- dest.getWidth(),
- dest.getHeight(),
- 0,
- data.getConsecutiveSize(),
- data.data);
- GL_CHECK_ERROR;
- }
- else
- {
- glCompressedTexSubImage2D(GL_TEXTURE_2D, mLevel,
- dest.left, dest.top,
- dest.getWidth(), dest.getHeight(),
- format, data.getConsecutiveSize(),
- data.data);
- GL_CHECK_ERROR;
- }
- }
- else if (mSoftwareMipmap)
- {
- if (data.getWidth() != data.rowPitch)
- {
- // TODO
- OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
- "Unsupported texture format",
- "GLESTextureBuffer::upload");
- }
- if (data.getHeight() * data.getWidth() != data.slicePitch)
- {
- // TODO
- OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
- "Unsupported texture format",
- "GLESTextureBuffer::upload");
- }
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- GL_CHECK_ERROR;
- buildMipmaps(data);
- }
- else
- {
- if(data.getWidth() != data.rowPitch)
- {
- // TODO
- OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
- "Unsupported texture format",
- "GLESTextureBuffer::upload");
- }
- if(data.getHeight()*data.getWidth() != data.slicePitch)
- {
- // TODO
- OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
- "Unsupported texture format",
- "GLESTextureBuffer::upload");
- }
- if ((data.getWidth() * PixelUtil::getNumElemBytes(data.format)) & 3) {
- // Standard alignment of 4 is not right
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- GL_CHECK_ERROR;
- }
- glTexSubImage2D(mFaceTarget,
- mLevel,
- dest.left, dest.top,
- dest.getWidth(), dest.getHeight(),
- GLESPixelUtil::getGLOriginFormat(data.format),
- GLESPixelUtil::getGLOriginDataType(data.format),
- data.data);
- GL_CHECK_ERROR;
- }
- glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
- GL_CHECK_ERROR;
- }
- //-----------------------------------------------------------------------------
- void GLESTextureBuffer::download(const PixelBox &data)
- {
- OGRE_EXCEPT(Exception::ERR_NOT_IMPLEMENTED,
- "Downloading texture buffers is not supported by OpenGL ES",
- "GLESTextureBuffer::download");
- }
- //-----------------------------------------------------------------------------
- void GLESTextureBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset)
- {
- assert(zoffset < mDepth);
- glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES, attachment,
- mFaceTarget, mTextureID, mLevel);
- GL_CHECK_ERROR;
- }
-
- void GLESTextureBuffer::copyFromFramebuffer(size_t zoffset)
- {
- glBindTexture(GL_TEXTURE_2D, mTextureID);
- GL_CHECK_ERROR;
- glCopyTexSubImage2D(GL_TEXTURE_2D, mLevel, 0, 0, 0, 0, mWidth, mHeight);
- GL_CHECK_ERROR;
- }
- //-----------------------------------------------------------------------------
- void GLESTextureBuffer::blit(const HardwarePixelBufferSharedPtr &src, const Image::Box &srcBox, const Image::Box &dstBox)
- {
- GLESTextureBuffer *srct = static_cast<GLESTextureBuffer *>(src.getPointer());
- // TODO: Check for FBO support first
- // Destination texture must be 2D
- // Source texture must be 2D
- if((src->getUsage() & TU_RENDERTARGET) == 0 && (srct->mTarget == GL_TEXTURE_2D))
- {
- blitFromTexture(srct, srcBox, dstBox);
- }
- else
- {
- GLESHardwarePixelBuffer::blit(src, srcBox, dstBox);
- }
- }
-
- //-----------------------------------------------------------------------------
- // Very fast texture-to-texture blitter and hardware bi/trilinear scaling implementation using FBO
- // Destination texture must be 2D
- // Source texture must be 2D
- // Supports compressed formats as both source and destination format, it will use the hardware DXT compressor
- // if available.
- // @author W.J. van der Laan
- void GLESTextureBuffer::blitFromTexture(GLESTextureBuffer *src, const Image::Box &srcBox, const Image::Box &dstBox)
- {
- if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_FBO) == false)
- {
- // the following code depends on FBO support, it crashes if FBO is not supported.
- // TODO - write PBUFFER version of this function or a version that doesn't require FBO
- return; // for now - do nothing.
- }
- // std::cerr << "GLESTextureBuffer::blitFromTexture " <<
- // src->mTextureID << ":" << srcBox.left << "," << srcBox.top << "," << srcBox.right << "," << srcBox.bottom << " " <<
- // mTextureID << ":" << dstBox.left << "," << dstBox.top << "," << dstBox.right << "," << dstBox.bottom << std::endl;
- // Store reference to FBO manager
- GLESFBOManager *fboMan = static_cast<GLESFBOManager *>(GLESRTTManager::getSingletonPtr());
-
- // Save and clear GL state for rendering
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
-
- RenderSystem* rsys = Root::getSingleton().getRenderSystem();
- rsys->_disableTextureUnitsFrom(0);
- // Disable alpha, depth and scissor testing, disable blending,
- // disable culling, disble lighting, disable fog and reset foreground
- // colour.
- glDisable(GL_ALPHA_TEST);
- glDisable(GL_DEPTH_TEST);
- glDisable(GL_SCISSOR_TEST);
- glDisable(GL_BLEND);
- glDisable(GL_CULL_FACE);
- glDisable(GL_LIGHTING);
- glDisable(GL_FOG);
- glColor4f(1.0f, 1.0f, 1.0f, 1.0f);
- GL_CHECK_ERROR;
- // Save and reset matrices
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glLoadIdentity();
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadIdentity();
- glMatrixMode(GL_TEXTURE);
- glPushMatrix();
- glLoadIdentity();
- GL_CHECK_ERROR;
-
- // Set up source texture
- glBindTexture(src->mTarget, src->mTextureID);
- GL_CHECK_ERROR;
-
- // Set filtering modes depending on the dimensions and source
- if(srcBox.getWidth()==dstBox.getWidth() &&
- srcBox.getHeight()==dstBox.getHeight() &&
- srcBox.getDepth()==dstBox.getDepth())
- {
- // Dimensions match -- use nearest filtering (fastest and pixel correct)
- glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
- GL_CHECK_ERROR;
- glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- GL_CHECK_ERROR;
- }
- else
- {
- // Dimensions don't match -- use bi or trilinear filtering depending on the
- // source texture.
- if(src->mUsage & TU_AUTOMIPMAP)
- {
- // Automatic mipmaps, we can safely use trilinear filter which
- // brings greatly imporoved quality for minimisation.
- glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
- GL_CHECK_ERROR;
- glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- GL_CHECK_ERROR;
- }
- else
- {
- // Manual mipmaps, stay safe with bilinear filtering so that no
- // intermipmap leakage occurs.
- glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
- GL_CHECK_ERROR;
- glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- GL_CHECK_ERROR;
- }
- }
- // Clamp to edge (fastest)
- glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- GL_CHECK_ERROR;
- glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
- GL_CHECK_ERROR;
-
- // Store old binding so it can be restored later
- GLint oldfb;
- glGetIntegerv(GL_FRAMEBUFFER_BINDING_OES, &oldfb);
- GL_CHECK_ERROR;
- // Set up temporary FBO
- glBindFramebufferOES(GL_FRAMEBUFFER_OES, fboMan->getTemporaryFBO());
- GL_CHECK_ERROR;
- GLuint tempTex = 0;
- if(!fboMan->checkFormat(mFormat))
- {
- // If target format not directly supported, create intermediate texture
- GLenum tempFormat = GLESPixelUtil::getClosestGLInternalFormat(fboMan->getSupportedAlternative(mFormat));
- glGenTextures(1, &tempTex);
- GL_CHECK_ERROR;
- glBindTexture(GL_TEXTURE_2D, tempTex);
- GL_CHECK_ERROR;
- // Allocate temporary texture of the size of the destination area
- glTexImage2D(GL_TEXTURE_2D, 0, tempFormat,
- GLESPixelUtil::optionalPO2(dstBox.getWidth()), GLESPixelUtil::optionalPO2(dstBox.getHeight()),
- 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
- GL_CHECK_ERROR;
- glFramebufferTexture2DOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES,
- GL_TEXTURE_2D, tempTex, 0);
- GL_CHECK_ERROR;
- // Set viewport to size of destination slice
- glViewport(0, 0, dstBox.getWidth(), dstBox.getHeight());
- GL_CHECK_ERROR;
- }
- else
- {
- // We are going to bind directly, so set viewport to size and position of destination slice
- glViewport(dstBox.left, dstBox.top, dstBox.getWidth(), dstBox.getHeight());
- GL_CHECK_ERROR;
- }
-
- // Process each destination slice
- for(size_t slice=dstBox.front; slice<dstBox.back; ++slice)
- {
- if(!tempTex)
- {
- /// Bind directly
- bindToFramebuffer(GL_COLOR_ATTACHMENT0_OES, slice);
- }
- if(tempTex)
- {
- // Copy temporary texture
- glBindTexture(mTarget, mTextureID);
- GL_CHECK_ERROR;
- switch(mTarget)
- {
- case GL_TEXTURE_2D:
- glCopyTexSubImage2D(mFaceTarget, mLevel,
- dstBox.left, dstBox.top,
- 0, 0, dstBox.getWidth(), dstBox.getHeight());
- GL_CHECK_ERROR;
- break;
- }
- }
- }
- // Finish up
- if(!tempTex)
- {
- // Generate mipmaps
- if(mUsage & TU_AUTOMIPMAP)
- {
- glBindTexture(mTarget, mTextureID);
- GL_CHECK_ERROR;
- glGenerateMipmapOES(mTarget);
- GL_CHECK_ERROR;
- }
- }
-
- // Reset source texture to sane state
- glBindTexture(src->mTarget, src->mTextureID);
- GL_CHECK_ERROR;
-
- // Detach texture from temporary framebuffer
- glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, GL_COLOR_ATTACHMENT0_OES,
- GL_RENDERBUFFER_OES, 0);
- GL_CHECK_ERROR;
- // Restore old framebuffer
- glBindFramebufferOES(GL_FRAMEBUFFER_OES, oldfb);
- GL_CHECK_ERROR;
- // Restore matrix stacks and render state
- glMatrixMode(GL_TEXTURE);
- glPopMatrix();
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- glMatrixMode(GL_MODELVIEW);
- glPopMatrix();
- GL_CHECK_ERROR;
- glDeleteTextures(1, &tempTex);
- GL_CHECK_ERROR;
- }
- //-----------------------------------------------------------------------------
- // blitFromMemory doing hardware trilinear scaling
- void GLESTextureBuffer::blitFromMemory(const PixelBox &src_orig, const Image::Box &dstBox)
- {
- // Fall back to normal GLHardwarePixelBuffer::blitFromMemory in case
- // - FBO is not supported
- // - Either source or target is luminance due doesn't looks like supported by hardware
- // - the source dimensions match the destination ones, in which case no scaling is needed
- if(!GL_OES_framebuffer_object ||
- PixelUtil::isLuminance(src_orig.format) ||
- PixelUtil::isLuminance(mFormat) ||
- (src_orig.getWidth() == dstBox.getWidth() &&
- src_orig.getHeight() == dstBox.getHeight() &&
- src_orig.getDepth() == dstBox.getDepth()))
- {
- GLESHardwarePixelBuffer::blitFromMemory(src_orig, dstBox);
- return;
- }
- if(!mBuffer.contains(dstBox))
- OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Destination box out of range",
- "GLESTextureBuffer::blitFromMemory");
- // For scoped deletion of conversion buffer
- MemoryDataStreamPtr buf;
- PixelBox src;
-
- // First, convert the srcbox to a OpenGL compatible pixel format
- if(GLESPixelUtil::getGLOriginFormat(src_orig.format) == 0)
- {
- // Convert to buffer internal format
- buf.bind(OGRE_NEW MemoryDataStream(PixelUtil::getMemorySize(src_orig.getWidth(), src_orig.getHeight(), src_orig.getDepth(),
- mFormat)));
- src = PixelBox(src_orig.getWidth(), src_orig.getHeight(), src_orig.getDepth(), mFormat, buf->getPtr());
- PixelUtil::bulkPixelConversion(src_orig, src);
- }
- else
- {
- // No conversion needed
- src = src_orig;
- }
-
- // Create temporary texture to store source data
- GLuint id;
- GLenum target = GL_TEXTURE_2D;
- GLsizei width = GLESPixelUtil::optionalPO2(src.getWidth());
- GLsizei height = GLESPixelUtil::optionalPO2(src.getHeight());
- GLenum format = GLESPixelUtil::getClosestGLInternalFormat(src.format);
- GLenum datatype = GLESPixelUtil::getGLOriginDataType(src.format);
- // Generate texture name
- glGenTextures(1, &id);
- GL_CHECK_ERROR;
-
- // Set texture type
- glBindTexture(target, id);
- GL_CHECK_ERROR;
-
- // Set automatic mipmap generation; nice for minimisation
- glTexParameteri(target, GL_GENERATE_MIPMAP, GL_TRUE );
- GL_CHECK_ERROR;
- // Allocate texture memory
- glTexImage2D(target, 0, format, width, height, 0, format, datatype, 0);
- GL_CHECK_ERROR;
- // GL texture buffer
- GLESTextureBuffer tex(StringUtil::BLANK, target, id, width, height, format, src.format,
- 0, 0, (Usage)(TU_AUTOMIPMAP|HBU_STATIC_WRITE_ONLY), false, false, 0);
-
- // Upload data to 0,0,0 in temporary texture
- Image::Box tempTarget(0, 0, 0, src.getWidth(), src.getHeight(), src.getDepth());
- tex.upload(src, tempTarget);
-
- // Blit
- blitFromTexture(&tex, tempTarget, dstBox);
-
- // Delete temp texture
- glDeleteTextures(1, &id);
- GL_CHECK_ERROR;
- }
-
- RenderTexture *GLESTextureBuffer::getRenderTarget(size_t zoffset)
- {
- assert(mUsage & TU_RENDERTARGET);
- assert(zoffset < mDepth);
- return mSliceTRT[zoffset];
- }
- void GLESTextureBuffer::buildMipmaps(const PixelBox &data)
- {
- int width;
- int height;
- int logW;
- int logH;
- int level;
- PixelBox scaled = data;
- scaled.data = data.data;
- scaled.left = data.left;
- scaled.right = data.right;
- scaled.top = data.top;
- scaled.bottom = data.bottom;
- scaled.front = data.front;
- scaled.back = data.back;
- width = data.getWidth();
- height = data.getHeight();
- logW = computeLog(width);
- logH = computeLog(height);
- level = (logW > logH ? logW : logH);
- for (int mip = 0; mip <= level; mip++)
- {
- GLenum glFormat = GLESPixelUtil::getGLOriginFormat(scaled.format);
- GLenum dataType = GLESPixelUtil::getGLOriginDataType(scaled.format);
- glTexImage2D(GL_TEXTURE_2D,
- mip,
- glFormat,
- width, height,
- 0,
- glFormat,
- dataType,
- scaled.data);
- GL_CHECK_ERROR;
- if (mip != 0)
- {
- OGRE_DELETE[] (uint8*) scaled.data;
- scaled.data = 0;
- }
- if (width > 1)
- {
- width = width / 2;
- }
- if (height > 1)
- {
- height = height / 2;
- }
- int sizeInBytes = PixelUtil::getMemorySize(width, height, 1,
- data.format);
- scaled = PixelBox(width, height, 1, data.format);
- scaled.data = OGRE_NEW_FIX_FOR_WIN32 uint8[sizeInBytes];
- Image::scale(data, scaled, Image::FILTER_LINEAR);
- }
- }
-
- //********* GLESRenderBuffer
- //-----------------------------------------------------------------------------
- GLESRenderBuffer::GLESRenderBuffer(GLenum format, size_t width, size_t height, GLsizei numSamples):
- GLESHardwarePixelBuffer(width, height, 1, GLESPixelUtil::getClosestOGREFormat(format, PF_A8R8G8B8),HBU_WRITE_ONLY)
- {
- mGLInternalFormat = format;
- // Generate renderbuffer
- glGenRenderbuffersOES(1, &mRenderbufferID);
- GL_CHECK_ERROR;
- // Bind it to FBO
- glBindRenderbufferOES(GL_RENDERBUFFER_OES, mRenderbufferID);
- GL_CHECK_ERROR;
-
- // Allocate storage for depth buffer
- if (numSamples <= 0)
- {
- glRenderbufferStorageOES(GL_RENDERBUFFER_OES, format,
- width, height);
- GL_CHECK_ERROR;
- }
- }
- //-----------------------------------------------------------------------------
- GLESRenderBuffer::~GLESRenderBuffer()
- {
- // Generate renderbuffer
- glDeleteRenderbuffersOES(1, &mRenderbufferID);
- GL_CHECK_ERROR;
- }
- //-----------------------------------------------------------------------------
- void GLESRenderBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset)
- {
- assert(zoffset < mDepth);
- glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES, attachment,
- GL_RENDERBUFFER_OES, mRenderbufferID);
- GL_CHECK_ERROR;
- }
- };