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opengl/fb: use GL_DEPTH24_STENCIL8 instead of GL_STENCIL_INDEX8 (#13067)

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older drivers lack support for GL_STENCIL_INDEX8 so use
GL_DEPTH24_STENCIL8 but explicitly disable the depth.
This commit is contained in:
Tom Englund 2026-01-23 21:09:39 +01:00 • committed by GitHub
parent 64db62d7e2
commit 2a2c2b0e28
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GPG key ID: B5690EEEBB952194
1 changed files with 10 additions and 4 deletions
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14
src/render/Framebuffer.cpp
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@ -38,8 +38,11 @@ bool CFramebuffer::alloc(int w, int h, uint32_t drmFormat) {
if (m_stencilTex) {
m_stencilTex->bind();
glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX8, w, h, 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, nullptr);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_stencilTex->m_texID, 0);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, w, h, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, nullptr);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_stencilTex->m_texID, 0);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
}
auto status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
@ -63,11 +66,14 @@ void CFramebuffer::addStencil(SP<CTexture> tex) {
m_stencilTex = tex;
m_stencilTex->bind();
glTexImage2D(GL_TEXTURE_2D, 0, GL_STENCIL_INDEX8, m_size.x, m_size.y, 0, GL_STENCIL_INDEX, GL_UNSIGNED_BYTE, nullptr);
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, m_size.x, m_size.y, 0, GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, nullptr);
glBindFramebuffer(GL_FRAMEBUFFER, m_fb);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_stencilTex->m_texID, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, m_stencilTex->m_texID, 0);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
auto status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
RASSERT((status == GL_FRAMEBUFFER_COMPLETE), "Failed adding a stencil to fbo!", status);