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Ensures proper left clipping of sprites.

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This commit is contained in:
Thomas Harte 2018-10-18 21:14:16 -04:00
parent 6a2db52adb
commit 512f085891
1 changed files with 20 additions and 2 deletions
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22
Components/9918/9918.cpp
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@ -711,6 +711,15 @@ void Base::draw_tms_character(int start, int end) {
// Paint sprites and check for collisions, but only if at least one sprite is active
// on this line.
if(line_buffer.active_sprite_slot) {
const int shift_advance = sprites_magnified_ ? 1 : 2;
// If this is the start of the line clip any part of any sprites that is off to the left.
if(!start) {
for(int index = 0; index < line_buffer.active_sprite_slot; ++index) {
LineBuffer::ActiveSprite &sprite = line_buffer.active_sprites[index];
if(sprite.x < 0) sprite.shift_position -= shift_advance * sprite.x;
}
}
int sprite_buffer[256];
int sprite_collision = 0;
memset(&sprite_buffer[start], 0, size_t(end - start)*sizeof(sprite_buffer[0]));
@ -719,7 +728,6 @@ void Base::draw_tms_character(int start, int end) {
static const int colour_masks[16] = {0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
// Draw all sprites into the sprite buffer.
const int shift_advance = sprites_magnified_ ? 1 : 2;
const int shifter_target = sprites_16x16_ ? 32 : 16;
for(int index = line_buffer.active_sprite_slot - 1; index >= 0; --index) {
LineBuffer::ActiveSprite &sprite = line_buffer.active_sprites[index];
@ -852,6 +860,16 @@ void Base::draw_sms(int start, int end) {
Apply sprites (if any).
*/
if(line_buffer.active_sprite_slot) {
const int shift_advance = sprites_magnified_ ? 1 : 2;
// If this is the start of the line clip any part of any sprites that is off to the left.
if(!start) {
for(int index = 0; index < line_buffer.active_sprite_slot; ++index) {
LineBuffer::ActiveSprite &sprite = line_buffer.active_sprites[index];
if(sprite.x < 0) sprite.shift_position -= shift_advance * sprite.x;
}
}
int sprite_buffer[256];
int sprite_collision = 0;
memset(&sprite_buffer[start], 0, size_t(end - start)*sizeof(sprite_buffer[0]));
@ -877,7 +895,7 @@ void Base::draw_sms(int start, int end) {
sprite_buffer[c] = sprite_colour | 0x10;
}
sprite.shift_position += sprites_magnified_ ? 1 : 2;
sprite.shift_position += shift_advance;
}
}
}