From 88cffa3220b7a0a2fa79a3315b4c7c4e31069a8e Mon Sep 17 00:00:00 2001
From: Filippos Karapetis
Date: Mon, 22 Aug 2016 19:04:26 +0300
Subject: SCI32: Add stubs for the kPlayVMDSetPreload and kPaletteSetGamma
 calls

These were introduced in SCI3, and are used by RAMA. We don't preload
videos, so we don't really need kPlayVMDSetPreload, but
kPaletteSetGamma may need an implementation.

With these two stubs, the main menu of RAMA is working again
---
 engines/sci/engine/kernel.h        |  1 +
 engines/sci/engine/kernel_tables.h |  2 ++
 engines/sci/engine/kgraphics32.cpp | 13 +++++++++++++
 3 files changed, 16 insertions(+)

diff --git a/engines/sci/engine/kernel.h b/engines/sci/engine/kernel.h
index 90f582c291..45477e1153 100644
--- a/engines/sci/engine/kernel.h
+++ b/engines/sci/engine/kernel.h
@@ -583,6 +583,7 @@ reg_t kSetScroll(EngineState *s, int argc, reg_t *argv);
 reg_t kPaletteSetFromResource32(EngineState *s, int argc, reg_t *argv);
 reg_t kPaletteFindColor32(EngineState *s, int argc, reg_t *argv);
 reg_t kPaletteSetFade(EngineState *s, int argc, reg_t *argv);
+reg_t kPaletteSetGamma(EngineState *s, int argc, reg_t *argv);
 
 reg_t kPalCycle(EngineState *s, int argc, reg_t *argv);
 reg_t kPalCycleSetCycle(EngineState *s, int argc, reg_t *argv);
diff --git a/engines/sci/engine/kernel_tables.h b/engines/sci/engine/kernel_tables.h
index acd1adf6ec..023a2c024b 100644
--- a/engines/sci/engine/kernel_tables.h
+++ b/engines/sci/engine/kernel_tables.h
@@ -303,6 +303,7 @@ static const SciKernelMapSubEntry kPalette_subops[] = {
 	{ SIG_SCI32,          1, MAP_CALL(PaletteSetFromResource32),  "i(i)",                 NULL },
 	{ SIG_SCI32,          2, MAP_CALL(PaletteSetFade),            "iii",                  NULL },
 	{ SIG_SCI32,          3, MAP_CALL(PaletteFindColor32),        "iii",                  NULL },
+	{ SIG_SCI3,           4, MAP_CALL(PaletteSetGamma),           "i",                    NULL },
 #endif
 	SCI_SUBOPENTRY_TERMINATOR
 };
@@ -465,6 +466,7 @@ static const SciKernelMapSubEntry kPlayVMD_subops[] = {
 	{ SIG_SINCE_SCI21,    18, MAP_DUMMY(PlayVMDStopBlobs),         "",                     NULL },
 	{ SIG_SINCE_SCI21,    21, MAP_CALL(PlayVMDSetBlackoutArea),    "iiii",                 NULL },
 	{ SIG_SINCE_SCI21,    23, MAP_CALL(PlayVMDRestrictPalette),    "ii",                   NULL },
+	{ SIG_SCI3,           28, MAP_EMPTY(PlayVMDSetPreload),        "i",                    NULL },
 	SCI_SUBOPENTRY_TERMINATOR
 };
 
diff --git a/engines/sci/engine/kgraphics32.cpp b/engines/sci/engine/kgraphics32.cpp
index 13a209ea55..f3eec59eaf 100644
--- a/engines/sci/engine/kgraphics32.cpp
+++ b/engines/sci/engine/kgraphics32.cpp
@@ -901,6 +901,19 @@ reg_t kPaletteFindColor32(EngineState *s, int argc, reg_t *argv) {
 	return make_reg(0, g_sci->_gfxPalette32->matchColor(r, g, b));
 }
 
+/*
+ * Used in SCI3. SCI3 contains 6 gamma look-up tables, with the first
+ * table (gamma = 0) being the default one.
+ */
+reg_t kPaletteSetGamma(EngineState *s, int argc, reg_t *argv) {
+	const uint8 gamma = argv[0].toUint16();
+	assert(gamma >= 0 && gamma <= 6);
+
+	warning("TODO: kPaletteSetGamma(%d)", gamma);
+
+	return s->r_acc;
+}
+
 reg_t kPaletteSetFade(EngineState *s, int argc, reg_t *argv) {
 	uint16 fromColor = argv[0].toUint16();
 	uint16 toColor = argv[1].toUint16();
-- 
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