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Some more PiStorm device stuff for ScummVM

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beeanyew
2021-09-11 11:36:56 +02:00
parent 96f61cdf30
commit 60c5e51585
2 changed files with 46 additions and 0 deletions
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1
platforms/amiga/pistorm-dev/pistorm-dev-enums.h
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@@ -44,6 +44,7 @@ enum pistorm_dev_cmds {
PI_CMD_COPYRECT_EX_MASK = 0x0208, // [W] Same as copyrect_ex, except with a mask color for transparent pixels.
PI_CMD_FILLRECT = 0x020A, // [W] Fills a memory rect with a color value.
PI_CMD_BLIT_NBPP = 0x020C, // [W] Render an N bpp bitmap of the full specified width to the target offset with optional color map.
PI_CMD_QBASIC = 0x0FFC, // QBasic
PI_CMD_NIBBLES = 0x0FFE, // Nibbles

45
platforms/amiga/pistorm-dev/pistorm-dev.c
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@@ -455,6 +455,51 @@ void handle_pistorm_dev_write(uint32_t addr_, uint32_t val, uint8_t type) {
}
}
break;
case PI_CMD_BLIT_NBPP:
if (pi_ptr[0] == 0 || pi_ptr[1] == 0) {
DEBUG("[PISTORM-DEV] BLIT_NBPP from/to null pointer not allowed. Aborting.\n");
pi_cmd_result = PI_RES_INVALIDVALUE;
} else if (pi_word[2] == 0 || pi_word[3] == 0) {
DEBUG("[PISTORM-DEV] BLIT_NBPP called with a width/height of 0. Aborting.\n");
pi_cmd_result = PI_RES_INVALIDVALUE;
} else {
int32_t src = get_mapped_item_by_address(cfg, pi_ptr[0]);
int32_t dst = get_mapped_item_by_address(cfg, pi_ptr[1]);
if (dst != -1 && src != -1) {
uint8_t *src_ptr = &cfg->map_data[src][(pi_ptr[0] - cfg->map_offset[src])];
uint8_t *dst_ptr = &cfg->map_data[dst][(pi_ptr[1] - cfg->map_offset[dst])];
uint8_t *pal_ptr = 0;
if (pi_ptr[2] != 0) {
pal_ptr = get_mapped_data_pointer_by_address(cfg, pi_ptr[2]);
}
uint8_t tmp = *src_ptr++;
uint8_t num_bits = 8;
for (int y = 0; y < pi_word[3] && y + pi_word[4] < pi_word[5]; y++) {
for (int x = 0; x < pi_word[2]; x++) {
int32_t color = (tmp >> (8 - val)) & 0xFF;
if (color && y + pi_word[4] >= 0) {
*dst_ptr = (pal_ptr) ? pal_ptr[color] : color;
}
dst_ptr++;
tmp <<= val;
num_bits -= val;
if (num_bits == 0) {
tmp = *src_ptr++;
num_bits = 8;
}
}
dst_ptr += pi_word[1];
}
} else {
// NYI
}
}
break;
case PI_CMD_SHOWFPS: rtg_show_fps((uint8_t)val); break;
case PI_CMD_PALETTEDEBUG: rtg_palette_debug((uint8_t)val); break;