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Merge pull request #188: Take alpha to coverage out of the dynamic state on AMD's RDNA 2-and-older driver (fixes #67) (tuwary)

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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Valiantsin DzerakhandClaude Opus 5.5 committed 2026-10-31 12:51:43 +03:00
2 parents 59e7884174 bca7e8aea5
commit 6c445ede2b
2 files changed
+12 -1
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runtime/cfg.c
+1 -1
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@@ -48,7 +48,7 @@ static const char *const known[] = {
"REPLAY_CHECK", "RESOLVE_CHECK", "ROMFS", "ROMFS_INDEX", "ROMFS_MMAP", "ROMFS_MODS", "ROMFS_PATCHES",
"ROMFS_PROOF_DIR", "ROMFS_VERIFY", "RUMBLE", "RUMBLE_CURVE", "RUMBLE_STRENGTH", "RUMBLE_TRIGGERS", "SHADER_CACHE",
"SHADER_MEMO", "SHARED_FONTS", "SHARPNESS", "SHOTS", "SHOTS_DIR", "SHOTS_FULL", "SPEED_PROBE", "SPIN", "SPIN_HANDOFF_US", "SPLIT_DRAWS", "SPLIT_US", "STICK_DEADZONE", "SWKBD_ANSWER",
"SWKBD_TEST", "TEST_PAD", "TEST_PREPARE_SHADERS", "TEX_ALIAS", "TEX_MEMO", "TEX_VRAM_PRESSURE", "TIMER_1MS", "TRACE", "UBO_SNAPSHOT", "UPSCALER", "VK_DYN_VERTEX", "VK_NO_FLOAT64",
"SWKBD_TEST", "TEST_PAD", "TEST_PREPARE_SHADERS", "TEX_ALIAS", "TEX_MEMO", "TEX_VRAM_PRESSURE", "TIMER_1MS", "TRACE", "UBO_SNAPSHOT", "UPSCALER", "VK_DYN_A2C", "VK_DYN_VERTEX", "VK_NO_FLOAT64",
"VK_PRESENT", "VK_RECORDER", "VK_SSBO_ALIGN", "VK_SUBGROUP", "VK_SUBGROUP_PIN", "VK_VALIDATION", "VOLUME", "VRAM_HEADROOM", "VS_OUTS",
"WB_FENCE_LIMIT", "WINDOW_SIZE", "XLATE", "XLATE_ID", "XLATE_PROCS", "ZSTD_CHECK", "ZSTD_NATIVE",
};
runtime/vk_pipeline.c
+11
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@@ -278,6 +278,17 @@ static int ensure_init(void) {
P.dyn_wmask = e3.extendedDynamicState3ColorWriteMask && PROC(set_wmask, "vkCmdSetColorWriteMaskEXT");
P.dyn_a2c = e3.extendedDynamicState3AlphaToCoverageEnable && PROC(set_a2c, "vkCmdSetAlphaToCoverageEnableEXT");
}
// TOTK_VK_DYN_A2C=0/1 forces dynamic alpha to coverage off or on. Default off on AMD's Windows driver branch for
// RDNA 2 and older (vk_caps.amd_sc), which applies alpha to coverage while the dynamic state says off: on an RX 590
// (24.9.1) TotK, which never turns it on, drew Link and the NPCs with depth but no colour (black silhouettes) and
// dithered other surfaces into checkerboards (issue #67, RX 470/570/580). Taken out of the dynamic state, it goes
// into the pipeline key and the characters draw.
const char *da = cfg_get("TOTK_VK_DYN_A2C"); // no fixed default: it depends on the driver, see above
int da_on = da && *da ? strcmp(da, "0") != 0 : !vk_caps.amd_sc;
if (!da_on && P.dyn_a2c) {
P.dyn_a2c = 0;
rt_log("vk_pipeline: dynamic alpha to coverage off (%s)", da && *da ? "TOTK_VK_DYN_A2C=0" : "AMD's driver for RDNA 2 and older");
}
#undef PROC
static const VkDynamicState core[] = {
VK_DYNAMIC_STATE_VIEWPORT_WITH_COUNT, VK_DYNAMIC_STATE_SCISSOR_WITH_COUNT, VK_DYNAMIC_STATE_DEPTH_BIAS,