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-rw-r--r--src/newgrf_commons.cpp170
1 files changed, 170 insertions, 0 deletions
diff --git a/src/newgrf_commons.cpp b/src/newgrf_commons.cpp
index ce4a6807a..d0d1c1c5f 100644
--- a/src/newgrf_commons.cpp
+++ b/src/newgrf_commons.cpp
@@ -23,6 +23,7 @@
#include "tunnelbridge_map.h"
#include "newgrf_object.h"
#include "genworld.h"
+#include "newgrf_spritegroup.h"
/**
* Constructor of generic class
@@ -435,6 +436,8 @@ uint32 GetNearbyTileInformation(TileIndex tile)
return tile_type << 24 | z << 16 | terrain_type << 8 | tileh;
}
+/* static */ SmallVector<DrawTileSeqStruct, 8> NewGRFSpriteLayout::result_seq;
+
/**
* Clone the building sprites of a spritelayout.
* @param source The building sprites to copy.
@@ -454,6 +457,26 @@ void NewGRFSpriteLayout::Clone(const DrawTileSeqStruct *source)
}
/**
+ * Clone a spritelayout.
+ * @param source The spritelayout to copy.
+ */
+void NewGRFSpriteLayout::Clone(const NewGRFSpriteLayout *source)
+{
+ this->Clone((const DrawTileSprites*)source);
+
+ if (source->registers != NULL) {
+ size_t count = 1; // 1 for the ground sprite
+ const DrawTileSeqStruct *element;
+ foreach_draw_tile_seq(element, source->seq) count++;
+
+ TileLayoutRegisters *regs = MallocT<TileLayoutRegisters>(count);
+ MemCpyT(regs, source->registers, count);
+ this->registers = regs;
+ }
+}
+
+
+/**
* Allocate a spritelayout for \a num_sprites building sprites.
* @param num_sprites Number of building sprites to allocate memory for. (not counting the terminator)
*/
@@ -465,3 +488,150 @@ void NewGRFSpriteLayout::Allocate(uint num_sprites)
sprites[num_sprites].MakeTerminator();
this->seq = sprites;
}
+
+/**
+ * Allocate memory for register modifiers.
+ */
+void NewGRFSpriteLayout::AllocateRegisters()
+{
+ assert(this->seq != NULL);
+ assert(this->registers == NULL);
+
+ size_t count = 1; // 1 for the ground sprite
+ const DrawTileSeqStruct *element;
+ foreach_draw_tile_seq(element, this->seq) count++;
+
+ this->registers = CallocT<TileLayoutRegisters>(count);
+}
+
+/**
+ * Prepares a sprite layout before resolving action-1-2-3 chains.
+ * Integrates offsets into the layout and determines which chains to resolve.
+ * @note The function uses statically allocated temporary storage, which is reused everytime when calling the function.
+ * That means, you have to use the sprite layout before calling #PrepareLayout() the next time.
+ * @param orig_offset Offset to apply to non-action-1 sprites.
+ * @param newgrf_ground_offset Offset to apply to action-1 ground sprites.
+ * @param newgrf_offset Offset to apply to action-1 non-ground sprites.
+ * @param separate_ground Whether the ground sprite shall be resolved by a separate action-1-2-3 chain by default.
+ * @return Bitmask of values for variable 10 to resolve action-1-2-3 chains for.
+ */
+uint32 NewGRFSpriteLayout::PrepareLayout(uint32 orig_offset, uint32 newgrf_ground_offset, uint32 newgrf_offset, bool separate_ground) const
+{
+ result_seq.Clear();
+ uint32 var10_values = 0;
+
+ /* Create a copy of the spritelayout, so we can modify some values.
+ * Also include the groundsprite into the sequence for easier processing. */
+ DrawTileSeqStruct *result = result_seq.Append();
+ result->image = ground;
+ result->delta_x = 0;
+ result->delta_y = 0;
+ result->delta_z = 0x80;
+
+ const DrawTileSeqStruct *dtss;
+ foreach_draw_tile_seq(dtss, this->seq) {
+ *result_seq.Append() = *dtss;
+ }
+ result_seq.Append()->MakeTerminator();
+
+ /* Determine the var10 values the action-1-2-3 chains needs to be resolved for,
+ * and apply the default sprite offsets (unless disabled). */
+ const TileLayoutRegisters *regs = this->registers;
+ bool ground = true;
+ foreach_draw_tile_seq(result, result_seq.Begin()) {
+ TileLayoutFlags flags = TLF_NOTHING;
+ if (regs != NULL) flags = regs->flags;
+
+ /* Record var10 value for the sprite */
+ if (HasBit(result->image.sprite, SPRITE_MODIFIER_CUSTOM_SPRITE) || (flags & TLF_SPRITE_REG_FLAGS)) {
+ uint8 var10 = (flags & TLF_SPRITE_VAR10) ? regs->sprite_var10 : (ground && separate_ground ? 1 : 0);
+ SetBit(var10_values, var10);
+ }
+
+ /* Add default sprite offset, unless there is a custom one */
+ if (!(flags & TLF_SPRITE)) {
+ if (HasBit(result->image.sprite, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
+ result->image.sprite += ground ? newgrf_ground_offset : newgrf_offset;
+ } else {
+ result->image.sprite += orig_offset;
+ }
+ }
+
+ /* Record var10 value for the palette */
+ if (HasBit(result->image.pal, SPRITE_MODIFIER_CUSTOM_SPRITE) || (flags & TLF_PALETTE_REG_FLAGS)) {
+ uint8 var10 = (flags & TLF_PALETTE_VAR10) ? regs->palette_var10 : (ground && separate_ground ? 1 : 0);
+ SetBit(var10_values, var10);
+ }
+
+ /* Add default palette offset, unless there is a custom one */
+ if (!(flags & TLF_PALETTE)) {
+ if (HasBit(result->image.pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) {
+ result->image.sprite += ground ? newgrf_ground_offset : newgrf_offset;
+ }
+ }
+
+ ground = false;
+ if (regs != NULL) regs++;
+ }
+
+ return var10_values;
+}
+
+/**
+ * Evaluates the register modifiers and integrates them into the preprocessed sprite layout.
+ * @pre #PrepareLayout() needs calling first.
+ * @param resolved_var10 The value of var10 the action-1-2-3 chain was evaluated for.
+ * @param resolved_sprite Result sprite of the action-1-2-3 chain.
+ * @param separate_ground Whether the ground sprite is resolved by a separate action-1-2-3 chain.
+ * @return Resulting spritelayout after processing the registers.
+ */
+void NewGRFSpriteLayout::ProcessRegisters(uint8 resolved_var10, uint32 resolved_sprite, bool separate_ground) const
+{
+ DrawTileSeqStruct *result;
+ const TileLayoutRegisters *regs = this->registers;
+ bool ground = true;
+ foreach_draw_tile_seq(result, result_seq.Begin()) {
+ TileLayoutFlags flags = TLF_NOTHING;
+ if (regs != NULL) flags = regs->flags;
+
+ /* Is the sprite or bounding box affected by an action-1-2-3 chain? */
+ if (HasBit(result->image.sprite, SPRITE_MODIFIER_CUSTOM_SPRITE) || (flags & TLF_SPRITE_REG_FLAGS)) {
+ /* Does the var10 value apply to this sprite? */
+ uint8 var10 = (flags & TLF_SPRITE_VAR10) ? regs->sprite_var10 : (ground && separate_ground ? 1 : 0);
+ if (var10 == resolved_var10) {
+ /* Apply registers */
+ if ((flags & TLF_DODRAW) && GetRegister(regs->dodraw) == 0) {
+ result->image.sprite = 0;
+ continue;
+ }
+ if (HasBit(result->image.sprite, SPRITE_MODIFIER_CUSTOM_SPRITE)) result->image.sprite += resolved_sprite;
+ if (flags & TLF_SPRITE) result->image.sprite += (int16)GetRegister(regs->sprite); // mask to 16 bits to avoid trouble
+
+ if (result->IsParentSprite()) {
+ if (flags & TLF_BB_XY_OFFSET) {
+ result->delta_x += (int32)GetRegister(regs->delta.parent[0]);
+ result->delta_y += (int32)GetRegister(regs->delta.parent[1]);
+ }
+ if (flags & TLF_BB_Z_OFFSET) result->delta_z += (int32)GetRegister(regs->delta.parent[2]);
+ } else {
+ if (flags & TLF_CHILD_X_OFFSET) result->delta_x += (int32)GetRegister(regs->delta.child[0]);
+ if (flags & TLF_CHILD_Y_OFFSET) result->delta_y += (int32)GetRegister(regs->delta.child[1]);
+ }
+ }
+ }
+
+ /* Is the palette affected by an action-1-2-3 chain? */
+ if (HasBit(result->image.pal, SPRITE_MODIFIER_CUSTOM_SPRITE) || (flags & TLF_PALETTE_REG_FLAGS)) {
+ /* Does the var10 value apply to this sprite? */
+ uint8 var10 = (flags & TLF_PALETTE_VAR10) ? regs->palette_var10 : (ground && separate_ground ? 1 : 0);
+ if (var10 == resolved_var10) {
+ /* Apply registers */
+ if (HasBit(result->image.pal, SPRITE_MODIFIER_CUSTOM_SPRITE)) result->image.pal += resolved_sprite;
+ if (flags & TLF_PALETTE) result->image.pal += (int16)GetRegister(regs->palette); // mask to 16 bits to avoid trouble
+ }
+ }
+
+ ground = false;
+ if (regs != NULL) regs++;
+ }
+}
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