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Added clear texture API. (#3836)

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This commit is contained in:
Branimir Karadžić
2026-07-16 05:41:58 +00:00
committed by GitHub
parent 759bdeb936
commit 435627021d
28 changed files with 707 additions and 6 deletions
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src/renderer_gl.cpp
+36
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@@ -3462,6 +3462,11 @@ namespace bgfx { namespace gl
m_textures[_handle.idx].update(_side, _mip, _rect, _z, _depth, _pitch, _mem);
}
void clearTexture(TextureHandle _handle, uint8_t _mip, uint8_t _numMips, uint16_t _layer, uint16_t _numLayers) override
{
m_textures[_handle.idx].clear(_mip, _numMips, _layer, _numLayers);
}
void readTexture(TextureHandle _handle, void* _data, uint16_t _layer, uint8_t _mip) override
{
if (m_readBackSupported)
@@ -5840,6 +5845,37 @@ namespace bgfx { namespace gl
return true;
}
void TextureGL::clear(uint8_t _mip, uint8_t _numMips, uint16_t _layer, uint16_t _numLayers)
{
if (NULL == glClearTexSubImage)
{
return;
}
const bool is3D = GL_TEXTURE_3D == m_target;
const uint32_t numSides = m_numLayers * (isCubeMap() ? 6 : 1);
const uint8_t mipBeg = bx::min<uint8_t>(_mip, m_numMips);
const uint8_t mipEnd = (UINT8_MAX == _numMips)
? m_numMips
: bx::min<uint8_t>(m_numMips, uint8_t(_mip + _numMips) )
;
for (uint8_t lod = mipBeg; lod < mipEnd; ++lod)
{
const GLsizei mipW = GLsizei(bx::max<uint32_t>(1, m_width >> lod) );
const GLsizei mipH = GLsizei(bx::max<uint32_t>(1, m_height >> lod) );
const GLint zoffset = is3D ? 0 : GLint(_layer);
const GLsizei depth = is3D
? GLsizei(bx::max<uint32_t>(1, m_depth >> lod) )
: GLsizei( (UINT16_MAX == _numLayers) ? numSides - _layer : _numLayers)
;
GL_CHECK(glClearTexSubImage(m_id, lod, 0, 0, zoffset, mipW, mipH, depth, m_fmt, m_type, NULL) );
}
}
void TextureGL::create(const Memory* _mem, uint64_t _flags, uint8_t _skip)
{
bimg::ImageContainer imageContainer;