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Corrects most of TMS sprite drawing.

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This commit is contained in:
Thomas Harte 2018-10-16 20:49:04 -04:00
parent 231009b901
commit 5dfe7d8596
2 changed files with 5 additions and 39 deletions
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38
Components/9918/9918.cpp
View File

@ -118,7 +118,6 @@ void Base::posit_sprite(LineBuffer &buffer, int sprite_number, int sprite_positi
if(buffer.sprites_stopped)
return;
// const int sprite_position = ram_[sprite_attribute_table_address_ + static_cast<size_t>(sprite_number << 2)];
// A sprite Y of 208 means "don't scan the list any further".
if(mode_timing_.allow_sprite_terminator && sprite_position == 208) {
buffer.sprites_stopped = true;
@ -139,39 +138,6 @@ void Base::posit_sprite(LineBuffer &buffer, int sprite_number, int sprite_positi
++buffer.active_sprite_slot;
}
//void Base::get_sprite_contents(int field, int cycles_left, int screen_row) {
/* int sprite_id = field / 6;
field %= 6;
while(true) {
const int cycles_in_sprite = std::min(cycles_left, 6 - field);
cycles_left -= cycles_in_sprite;
const int final_field = cycles_in_sprite + field;
assert(sprite_id < 4);
SpriteSet::ActiveSprite &sprite = sprite_sets_[active_sprite_set_].active_sprites[sprite_id];
if(field < 4) {
std::memcpy(
&sprite.info[field],
&ram_[sprite_attribute_table_address_ + static_cast<size_t>((sprite.index << 2) + field)],
static_cast<size_t>(std::min(4, final_field) - field));
}
field = std::min(4, final_field);
const int sprite_offset = sprite.info[2] & ~(sprites_16x16_ ? 3 : 0);
const size_t sprite_address = sprite_generator_table_address_ + static_cast<size_t>(sprite_offset << 3) + sprite.row; // TODO: recalclate sprite.row from screen_row (?)
while(field < final_field) {
sprite.image[field - 4] = ram_[sprite_address + static_cast<size_t>(((field - 4) << 4))];
field++;
}
if(!cycles_left) return;
field = 0;
sprite_id++;
}*/
//}
void TMS9918::run_for(const HalfCycles cycles) {
// As specific as I've been able to get:
// Scanline time is always 228 cycles.
@ -767,9 +733,9 @@ void Base::draw_tms_character(int start, int end) {
sprite_collision |= sprite_buffer[c] & sprite_colour;
sprite_buffer[c] |= sprite_colour;
sprite_colour &= colour_masks[sprite.image[3]&15];
sprite_colour &= colour_masks[sprite.image[2]&15];
pixel_origin_[c] =
(pixel_origin_[c] & sprite_colour_selection_masks[sprite_colour^1]) | (palette[sprite.image[3]&15] & sprite_colour_selection_masks[sprite_colour]);
(pixel_origin_[c] & sprite_colour_selection_masks[sprite_colour^1]) | (palette[sprite.image[2]&15] & sprite_colour_selection_masks[sprite_colour]);
sprite.shift_position += shift_advance;
}

6
Components/9918/Implementation/9918Base.hpp
View File

@ -510,14 +510,14 @@ class Base {
slot(location+3): {\
const uint8_t name = ram_[\
sprite_attribute_table_address_ & size_t(0x3f82 | (line_buffer.active_sprites[sprite].index << 2))\
] & (sprites_16x16_ ? ~1 : ~0);\
] & (sprites_16x16_ ? ~3 : ~0);\
line_buffer.active_sprites[sprite].image[2] = ram_[\
sprite_attribute_table_address_ & size_t(0x3f83 | (line_buffer.active_sprites[sprite].index << 2))\
];\
line_buffer.active_sprites[sprite].x -= (line_buffer.active_sprites[sprite].image[2] & 0x80) >> 2;\
const size_t graphic_location = sprite_generator_table_address_ & size_t(0x2000 | (name << 3) | (line_buffer.active_sprites[sprite].row << 1)); \
const size_t graphic_location = sprite_generator_table_address_ & size_t(0x3800 | (name << 3) | line_buffer.active_sprites[sprite].row); \
line_buffer.active_sprites[sprite].image[0] = ram_[graphic_location];\
line_buffer.active_sprites[sprite].image[1] = ram_[graphic_location+1];\
line_buffer.active_sprites[sprite].image[1] = ram_[graphic_location+16];\
}
#define sprite_fetch_block(location, sprite) \