diff --git a/src/c/vwf.c b/src/c/vwf.c index ba4d742..28e199e 100644 --- a/src/c/vwf.c +++ b/src/c/vwf.c @@ -1696,43 +1696,70 @@ void print_blankstr_buffer(int x, int y, int width, byte *dest) void load_pixels_overworld_buffer() { byte* buffer = (byte*)(OVERWORLD_BUFFER - ((*tile_offset) * TILESET_OFFSET_BUFFER_MULTIPLIER)); - for(int y = 0; y < 0x10; y++) - for(int x = 0; x < 0x1C; x++) - { - int tile_buffer = get_tile_number_with_offset_buffer(x + 1, y + 1); - int tile = get_tile_number_with_offset(x + 1, y + 1); - int foregroundRow = 0xFFFFFFFF; - buffer[(tile_buffer * 8) + 0] = reduce_bit_depth(vram[(tile * 8) + 0], foregroundRow); - buffer[(tile_buffer * 8) + 1] = reduce_bit_depth(vram[(tile * 8) + 1], foregroundRow); - buffer[(tile_buffer * 8) + 2] = reduce_bit_depth(vram[(tile * 8) + 2], foregroundRow); - buffer[(tile_buffer * 8) + 3] = reduce_bit_depth(vram[(tile * 8) + 3], foregroundRow); - buffer[(tile_buffer * 8) + 4] = reduce_bit_depth(vram[(tile * 8) + 4], foregroundRow); - buffer[(tile_buffer * 8) + 5] = reduce_bit_depth(vram[(tile * 8) + 5], foregroundRow); - buffer[(tile_buffer * 8) + 6] = reduce_bit_depth(vram[(tile * 8) + 6], foregroundRow); - buffer[(tile_buffer * 8) + 7] = reduce_bit_depth(vram[(tile * 8) + 7], foregroundRow); - } + for(int i = 0; i < 8 * 0x1C; i++) + { + //Doing this saves about 100k cycles during load + int tile = m2_coord_table[i] + *tile_offset; + int addedValue = (i >> 5) << 6; + int tile_buffer = (i & 0x1F) + addedValue + *tile_offset; + int foregroundRow = 0xFFFFFFFF; + buffer[(tile_buffer * 8) + 0] = reduce_bit_depth(vram[(tile * 8) + 0], foregroundRow); + buffer[(tile_buffer * 8) + 1] = reduce_bit_depth(vram[(tile * 8) + 1], foregroundRow); + buffer[(tile_buffer * 8) + 2] = reduce_bit_depth(vram[(tile * 8) + 2], foregroundRow); + buffer[(tile_buffer * 8) + 3] = reduce_bit_depth(vram[(tile * 8) + 3], foregroundRow); + buffer[(tile_buffer * 8) + 4] = reduce_bit_depth(vram[(tile * 8) + 4], foregroundRow); + buffer[(tile_buffer * 8) + 5] = reduce_bit_depth(vram[(tile * 8) + 5], foregroundRow); + buffer[(tile_buffer * 8) + 6] = reduce_bit_depth(vram[(tile * 8) + 6], foregroundRow); + buffer[(tile_buffer * 8) + 7] = reduce_bit_depth(vram[(tile * 8) + 7], foregroundRow); + tile_buffer += 0x20; + tile += 0x20; + buffer[(tile_buffer * 8) + 0] = reduce_bit_depth(vram[(tile * 8) + 0], foregroundRow); + buffer[(tile_buffer * 8) + 1] = reduce_bit_depth(vram[(tile * 8) + 1], foregroundRow); + buffer[(tile_buffer * 8) + 2] = reduce_bit_depth(vram[(tile * 8) + 2], foregroundRow); + buffer[(tile_buffer * 8) + 3] = reduce_bit_depth(vram[(tile * 8) + 3], foregroundRow); + buffer[(tile_buffer * 8) + 4] = reduce_bit_depth(vram[(tile * 8) + 4], foregroundRow); + buffer[(tile_buffer * 8) + 5] = reduce_bit_depth(vram[(tile * 8) + 5], foregroundRow); + buffer[(tile_buffer * 8) + 6] = reduce_bit_depth(vram[(tile * 8) + 6], foregroundRow); + buffer[(tile_buffer * 8) + 7] = reduce_bit_depth(vram[(tile * 8) + 7], foregroundRow); + } } void store_pixels_overworld_buffer(int totalYs) { byte* buffer = (byte*)(OVERWORLD_BUFFER - ((*tile_offset) * TILESET_OFFSET_BUFFER_MULTIPLIER)); - for(int y = 0; y < totalYs; y++) - for(int x = 0; x < 0x1C; x++) - { - int tile = get_tile_number_with_offset(x + 1, y + 1); - int tile_buffer = get_tile_number_with_offset_buffer(x + 1, y + 1); - int* bufferValues = (int*)(&buffer[(tile_buffer * 8)]); - unsigned int first_half = bufferValues[0]; - unsigned int second_half = bufferValues[1]; - vram[(tile * 8) + 0] = m2_bits_to_nybbles_fast[(first_half >> 0) & 0xFF]; - vram[(tile * 8) + 1] = m2_bits_to_nybbles_fast[(first_half >> 8) & 0xFF]; - vram[(tile * 8) + 2] = m2_bits_to_nybbles_fast[(first_half >> 0x10) & 0xFF]; - vram[(tile * 8) + 3] = m2_bits_to_nybbles_fast[(first_half >> 0x18) & 0xFF]; - vram[(tile * 8) + 4] = m2_bits_to_nybbles_fast[(second_half >> 0) & 0xFF]; - vram[(tile * 8) + 5] = m2_bits_to_nybbles_fast[(second_half >> 8) & 0xFF]; - vram[(tile * 8) + 6] = m2_bits_to_nybbles_fast[(second_half >> 0x10) & 0xFF]; - vram[(tile * 8) + 7] = m2_bits_to_nybbles_fast[(second_half >> 0x18) & 0xFF]; - } + totalYs >>= 1; + int total = totalYs * 0x1C; + for(int i = 0; i < total; i++) + { + //Not using functions for the tile values saves about 30k cycles on average + int tile = m2_coord_table[i] + *tile_offset; + int addedValue = (i >> 5) << 6; + int tile_buffer = (i & 0x1F) + addedValue + *tile_offset; + int* bufferValues = (int*)(&buffer[(tile_buffer * 8)]); + unsigned int first_half = bufferValues[0]; + unsigned int second_half = bufferValues[1]; + vram[(tile * 8) + 0] = m2_bits_to_nybbles_fast[(first_half >> 0) & 0xFF]; + vram[(tile * 8) + 1] = m2_bits_to_nybbles_fast[(first_half >> 8) & 0xFF]; + vram[(tile * 8) + 2] = m2_bits_to_nybbles_fast[(first_half >> 0x10) & 0xFF]; + vram[(tile * 8) + 3] = m2_bits_to_nybbles_fast[(first_half >> 0x18) & 0xFF]; + vram[(tile * 8) + 4] = m2_bits_to_nybbles_fast[(second_half >> 0) & 0xFF]; + vram[(tile * 8) + 5] = m2_bits_to_nybbles_fast[(second_half >> 8) & 0xFF]; + vram[(tile * 8) + 6] = m2_bits_to_nybbles_fast[(second_half >> 0x10) & 0xFF]; + vram[(tile * 8) + 7] = m2_bits_to_nybbles_fast[(second_half >> 0x18) & 0xFF]; + //Do the tile right below (Saves about 50k cycles on average) + tile += 0x20; + bufferValues += 0x40; + first_half = bufferValues[0]; + second_half = bufferValues[1]; + vram[(tile * 8) + 0] = m2_bits_to_nybbles_fast[(first_half >> 0) & 0xFF]; + vram[(tile * 8) + 1] = m2_bits_to_nybbles_fast[(first_half >> 8) & 0xFF]; + vram[(tile * 8) + 2] = m2_bits_to_nybbles_fast[(first_half >> 0x10) & 0xFF]; + vram[(tile * 8) + 3] = m2_bits_to_nybbles_fast[(first_half >> 0x18) & 0xFF]; + vram[(tile * 8) + 4] = m2_bits_to_nybbles_fast[(second_half >> 0) & 0xFF]; + vram[(tile * 8) + 5] = m2_bits_to_nybbles_fast[(second_half >> 8) & 0xFF]; + vram[(tile * 8) + 6] = m2_bits_to_nybbles_fast[(second_half >> 0x10) & 0xFF]; + vram[(tile * 8) + 7] = m2_bits_to_nybbles_fast[(second_half >> 0x18) & 0xFF]; + } } // x,y: tile coordinates diff --git a/src/m2-vwf-entries.asm b/src/m2-vwf-entries.asm index e2e1b2b..4603013 100644 --- a/src/m2-vwf-entries.asm +++ b/src/m2-vwf-entries.asm @@ -2977,6 +2977,7 @@ pop {r0-r3,pc} //Stores the buffer into the vram. This avoids screen tearing. store_pixels_overworld: push {r0-r3,lr} +swi #5 //The improved performances allow using a VBlank before the storage in order to prevent screen tearing effectively mov r0,#0x10 bl store_pixels_overworld_buffer pop {r0-r3,pc} @@ -2985,6 +2986,7 @@ pop {r0-r3,pc} //Stores the buffer into the vram. This avoids screen tearing. store_pixels_overworld_psi_window: push {r0-r3,lr} +swi #5 //The improved performances allow using a VBlank before the storage in order to prevent screen tearing effectively mov r0,#0xA bl store_pixels_overworld_buffer pop {r0-r3,pc}