Clean up custom LoadTextureBlock in z_map_mark.c and z_lmap_mark.c (#1896)

* experimental inc.c

* make it look proper

* make table types u32

* ZCONST -> COND_CONST

* Tharo suggestion and comment

* implement MM Decomp suggestions

* fix minor nits

* Update header guard

1 files changed, 68 insertions, 0 deletions

diff --git a/src/code/gDPLoadTextureBlock_Runtime.inc.c b/src/code/gDPLoadTextureBlock_Runtime.inc.c
new file mode 100644
index 000000000..55be14451
--- /dev/null
+++ b/src/code/gDPLoadTextureBlock_Runtime.inc.c
@@ -0,0 +1,68 @@
+#ifndef GDP_LOADTEXTUREBLOCK_RUNTIME_INC_C
+#define GDP_LOADTEXTUREBLOCK_RUNTIME_INC_C
+
+#include "gfx.h"
+
+#ifndef GDP_LOADTEXTUREBLOCK_RUNTIME_QUALIFIERS
+#define GDP_LOADTEXTUREBLOCK_RUNTIME_QUALIFIERS
+#endif
+
+// The Following arrays must be defined as const in z_lmap_mark.c to appear in rodata
+
+static GDP_LOADTEXTUREBLOCK_RUNTIME_QUALIFIERS u32 sLoadTextureBlock_siz[] = {
+    G_IM_SIZ_4b,
+    G_IM_SIZ_8b,
+    G_IM_SIZ_16b,
+    G_IM_SIZ_32b,
+};
+static GDP_LOADTEXTUREBLOCK_RUNTIME_QUALIFIERS u32 sLoadTextureBlock_siz_LOAD_BLOCK[] = {
+    G_IM_SIZ_4b_LOAD_BLOCK,
+    G_IM_SIZ_8b_LOAD_BLOCK,
+    G_IM_SIZ_16b_LOAD_BLOCK,
+    G_IM_SIZ_32b_LOAD_BLOCK,
+};
+static GDP_LOADTEXTUREBLOCK_RUNTIME_QUALIFIERS u32 sLoadTextureBlock_siz_INCR[] = {
+    G_IM_SIZ_4b_INCR,
+    G_IM_SIZ_8b_INCR,
+    G_IM_SIZ_16b_INCR,
+    G_IM_SIZ_32b_INCR,
+};
+static GDP_LOADTEXTUREBLOCK_RUNTIME_QUALIFIERS u32 sLoadTextureBlock_siz_SHIFT[] = {
+    G_IM_SIZ_4b_SHIFT,
+    G_IM_SIZ_8b_SHIFT,
+    G_IM_SIZ_16b_SHIFT,
+    G_IM_SIZ_32b_SHIFT,
+};
+static GDP_LOADTEXTUREBLOCK_RUNTIME_QUALIFIERS u32 sLoadTextureBlock_siz_BYTES[] = {
+    G_IM_SIZ_4b_BYTES,
+    G_IM_SIZ_8b_BYTES,
+    G_IM_SIZ_16b_BYTES,
+    G_IM_SIZ_32b_BYTES,
+};
+static GDP_LOADTEXTUREBLOCK_RUNTIME_QUALIFIERS u32 sLoadTextureBlock_siz_LINE_BYTES[] = {
+    G_IM_SIZ_4b_LINE_BYTES,
+    G_IM_SIZ_8b_LINE_BYTES,
+    G_IM_SIZ_16b_LINE_BYTES,
+    G_IM_SIZ_32b_LINE_BYTES,
+};
+
+/**
+ * Implements a version of gDPLoadTextureBlock using table lookups instead of token pasting, to allow values to be
+ * passed into `siz` during runtime.
+ */
+#define gDPLoadTextureBlock_Runtime(pkt, timg, fmt, siz, width, height, pal, cms, cmt, masks, maskt, shifts, shiftt)   \
+    _DW({                                                                                                              \
+        gDPSetTextureImage(pkt, fmt, sLoadTextureBlock_siz_LOAD_BLOCK[siz], 1, timg);                                  \
+        gDPSetTile(pkt, fmt, sLoadTextureBlock_siz_LOAD_BLOCK[siz], 0, 0, G_TX_LOADTILE, 0, cmt, maskt, shiftt, cms,   \
+                   masks, shifts);                                                                                     \
+        gDPLoadSync(pkt);                                                                                              \
+        gDPLoadBlock(pkt, G_TX_LOADTILE, 0, 0,                                                                         \
+                     (((width) * (height) + sLoadTextureBlock_siz_INCR[siz]) >> sLoadTextureBlock_siz_SHIFT[siz]) - 1, \
+                     CALC_DXT(width, sLoadTextureBlock_siz_BYTES[siz]));                                               \
+        gDPPipeSync(pkt);                                                                                              \
+        gDPSetTile(pkt, fmt, sLoadTextureBlock_siz[siz], (((width)*sLoadTextureBlock_siz_LINE_BYTES[siz]) + 7) >> 3,   \
+                   0, G_TX_RENDERTILE, pal, cmt, maskt, shiftt, cms, masks, shifts);                                   \
+        gDPSetTileSize(pkt, G_TX_RENDERTILE, 0, 0, ((width)-1) << G_TEXTURE_IMAGE_FRAC,                                \
+                       ((height)-1) << G_TEXTURE_IMAGE_FRAC);                                                          \
+    })
+#endif