The backbuffer is now a Swapchain, from GetPrimarySwapchain(), and
callers bind, measure and read it back through that instead of nullptr.
nullptr still means it too. Backends with one swapchain map the primary
to their old backbuffer path.
On Metal, CreateSwapchain() adds more, each with its own layer, depth
buffer and drawable. Passes merge per swapchain, and Present() presents
every drawable acquired that frame. The backbuffer is just the first
of them. Nothing creates a second one yet.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Nothing reads from textures or storage buffers in vertex shaders since
hardware tessellation was removed. Drop what was left for it: the
vertexTexture flag of VulkanTexture::EndCreate (always false), the
STORAGE_BUFFER_VERTEX binding type, GL's maxVertexTextureUnits, and the
tesselationShaderSupported cap, which nothing read (and which was always
false, since the feature was never enabled).
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
ResizeFramebufFBO now asks the framebuffer whether it has a depth/stencil
buffer instead of guessing from the z address and stride.
Vulkan CopyFramebuffer gets the debug asserts and bail-out BlitFramebuffer
already had, and GL copies and blits get the same, so a copy out of a
framebuffer without depth/stencil asserts where it's queued instead of in
the queue runner.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
MoltenVK doesn't support a sampler mipLodBias (the portability subset's
samplerMipLodBias is false), so the PSP's LOD bias did nothing on Mac and
iOS, and biased textures came out a mip level blurrier than on OpenGL and
the PSP: MLB's signs and crowd, Burnout Legends, MediEvil, Ridge Racer 2.
Query the portability subset, and where the bias is missing, pass the auto
mode bias to texture() from a uniform instead.
VK_ENABLE_BETA_EXTENSIONS, which declares the portability subset, is now
defined for App Store iOS builds too.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
With MSAA, a framebuffer textured as CLUT indices was read resolved, so the
indices along edges were averages of the samples and looked up wrong colors.
Dragon Ball Z: Tenkaichi Tag Team draws its outlines from a CLUT32 lookup of
its framebuffer, and they came out noisy and miscolored. Copy each pixel's
first sample with texelFetch into a temporary buffer and look up that.
This needs the multisampled color images to be sampled, and transitioned
back to attachment layout before rendering to them again.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
imgui 1.92 hands the backend a list of dirty rectangles when its font atlas
grows, but thin3d could only replace a whole mip level, so every new glyph
re-uploaded the entire atlas.
Adds DrawContext::UpdateTextureRegions, taking a batch of regions so each
backend can submit them together:
- Vulkan: packs the regions into the push pool and issues a single
vkCmdCopyBufferToImage from the init command buffer, transitioning only
the level being written.
- OpenGL: new TEXTURE_SUBIMAGE init step. The existing sub-image path is a
render command needing an active render pass and a texture slot, which
doesn't fit here. Rows are packed caller-side since GLES2 lacks
GL_UNPACK_ROW_LENGTH.
- D3D11: UpdateSubresource with a box, no staging texture needed.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Previously the exclusive fullscreen option in the settings screen was
guarded by a compile-time #ifdef VK_EXT_full_screen_exclusive, which is
always true on Windows. It now uses a runtime fullScreenExclusiveSupported
cap derived from whether the extension is actually enabled by the driver.
Switching between borderless and exclusive fullscreen currently requires a
restart. This is because once DWM has claimed the window (any frames
presented), ALLOWED_EXT cannot re-engage exclusive mode on an existing
swapchain. A new process gets a fresh HWND that DWM has not claimed yet,
so ALLOWED_EXT works correctly at startup.
The proper fix is to use VK_FULL_SCREEN_EXCLUSIVE_APPLICATION_CONTROLLED_EXT
with vkAcquireFullScreenExclusiveModeEXT/vkReleaseFullScreenExclusiveModeEXT
to explicitly negotiate exclusive mode with DWM mid-session without needing
a restart. To be done in a follow-up.
