void GLPixelBuffer::blitFromTexture(GLTextureBuffer* src)
{
blitFromTexture(src,
PixelVolume(0, 0, 0, src->getWidth(), src->getHeight(), src->getDepth()),
PixelVolume(0, 0, 0, mWidth, mHeight, mDepth)
);
}
//-----------------------------------------------------------------------------
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);
}
}
//-----------------------------------------------------------------------------
// 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(BLANKSTRING, 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;
}
//-----------------------------------------------------------------------------
// blitFromMemory doing hardware trilinear scaling
void GLES2TextureBuffer::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
// TODO: Check that extension is NOT available
if(PixelUtil::isLuminance(src_orig.format) ||
PixelUtil::isLuminance(mFormat) ||
(src_orig.getWidth() == dstBox.getWidth() &&
src_orig.getHeight() == dstBox.getHeight() &&
src_orig.getDepth() == dstBox.getDepth()))
{
GLES2HardwarePixelBuffer::blitFromMemory(src_orig, dstBox);
return;
}
if(!mBuffer.contains(dstBox))
OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Destination box out of range",
"GLES2TextureBuffer::blitFromMemory");
// For scoped deletion of conversion buffer
MemoryDataStreamPtr buf;
PixelBox src;
// First, convert the srcbox to a OpenGL compatible pixel format
if(GLES2PixelUtil::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 =
#if OGRE_NO_GLES3_SUPPORT == 0
(src.getDepth() != 1) ? GL_TEXTURE_3D :
#endif
GL_TEXTURE_2D;
GLsizei width = GLES2PixelUtil::optionalPO2(src.getWidth());
GLsizei height = GLES2PixelUtil::optionalPO2(src.getHeight());
GLenum format = GLES2PixelUtil::getClosestGLInternalFormat(src.format);
GLenum datatype = GLES2PixelUtil::getGLOriginDataType(src.format);
// Generate texture name
OGRE_CHECK_GL_ERROR(glGenTextures(1, &id));
// Set texture type
OGRE_CHECK_GL_ERROR(glBindTexture(target, id));
#if GL_APPLE_texture_max_level && OGRE_PLATFORM != OGRE_PLATFORM_NACL
OGRE_CHECK_GL_ERROR(glTexParameteri(target, GL_TEXTURE_MAX_LEVEL_APPLE, 1000 ));
#elif OGRE_NO_GLES3_SUPPORT == 0
OGRE_CHECK_GL_ERROR(glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, 1000 ));
#endif
// Allocate texture memory
#if OGRE_NO_GLES3_SUPPORT == 0
if(target == GL_TEXTURE_3D || target == GL_TEXTURE_2D_ARRAY)
glTexImage3D(target, 0, src.format, src.getWidth(), src.getHeight(), src.getDepth(), 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
else
#endif
OGRE_CHECK_GL_ERROR(glTexImage2D(target, 0, format, width, height, 0, format, datatype, 0));
// GL texture buffer
GLES2TextureBuffer 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
OGRE_CHECK_GL_ERROR(glDeleteTextures(1, &id));
}
