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[Fix] (MG_Impl/Framebuffer, MG_State/Framebuffer, MG_Backend/DirectGLES): redone fbo attachment management. remap GL -> ES attachment names

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swung0x48
2025-11-15 00:39:07 +08:00
parent 899563165e
commit e93dff52dc
6 changed files with 171 additions and 64 deletions
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MobileGL/MG_Backend/DirectGLES/Managers.h
+21 -1
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@@ -83,12 +83,32 @@ namespace MobileGL::MG_Backend::DirectGLES {
class BackendFramebufferObject {
public:
BackendFramebufferObject();
void SyncToBackend(SharedPtr<MG_State::GLState::FramebufferObject>& stateFBOObject);
void SyncToBackend(SharedPtr<MG_State::GLState::FramebufferObject>& stateFBOObject, FramebufferTarget asTarget);
Uint GetBackendFramebufferId() { return m_backendFBOId; }
void Bind(FramebufferTarget target);
private:
Uint m_backendFBOId = 0;
/* this will save buffers in its original form,
reversion, absence or not consecutive are all allowed, as long as GL spec allows it
i.e. it could be like [COLOR_ATTACHMENT0, COLOR_ATTACHMENT5, NONE, COLOR_ATTACHMENT4]
Probably useful to re-link shader output according to this.
aka. realizing `glBindFragDataLocation`
*/
GLenum m_frontendBuffers[MG_State::GLState::FramebufferObject::MAX_DRAW_BUFFERS] = {GL_NONE};
/* this will save buffers in its compacted GL form,
not consecutive is not allowed
i.e. it could be like [COLOR_ATTACHMENT0, COLOR_ATTACHMENT5, COLOR_ATTACHMENT4]
(no GL_NONE among those)
*/
GLenum m_compactedFrontendBuffers[MG_State::GLState::FramebufferObject::MAX_DRAW_BUFFERS] = {GL_NONE};
/* this will save buffers in stricter ES rules
reversion, absence or not consecutive are not allowed, according to ES spec
i.e. it could be like [COLOR_ATTACHMENT0, COLOR_ATTACHMENT1, NONE, NONE, ...]
this array could be provided as data directly to ES `glDrawBuffers` function
*/
GLenum m_backendBuffers[MG_State::GLState::FramebufferObject::MAX_DRAW_BUFFERS] = {GL_NONE};
};
extern UnorderedMap<SharedPtr<MG_State::GLState::FramebufferObject>, SharedPtr<BackendFramebufferObject>>