aboutsummaryrefslogtreecommitdiff
path: root/saga/animation.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'saga/animation.cpp')
-rw-r--r--saga/animation.cpp249
1 files changed, 122 insertions, 127 deletions
diff --git a/saga/animation.cpp b/saga/animation.cpp
index 81552d5584..92195afad4 100644
--- a/saga/animation.cpp
+++ b/saga/animation.cpp
@@ -24,7 +24,6 @@
// Background animation management module
#include "saga.h"
#include "reinherit.h"
-#include "yslib.h"
#include "cvar_mod.h"
#include "console_mod.h"
@@ -94,7 +93,7 @@ int ANIM_Load(const byte *anim_resdata, size_t anim_resdata_len, uint16 *anim_id
new_anim->resdata_len = anim_resdata_len;
if (GAME_GetGameType() == R_GAMETYPE_ITE) {
- if (ANIM_GetNumFrames(anim_resdata, &new_anim->n_frames) != R_SUCCESS) {
+ if (ANIM_GetNumFrames(anim_resdata, anim_resdata_len, &new_anim->n_frames) != R_SUCCESS) {
R_printf(R_STDERR, "Error: Couldn't get animation frame count.\n");
return R_FAILURE;
}
@@ -107,12 +106,12 @@ int ANIM_Load(const byte *anim_resdata, size_t anim_resdata_len, uint16 *anim_id
}
for (i = 0; i < new_anim->n_frames; i++) {
- ANIM_GetFrameOffset(anim_resdata, i + 1, &new_anim->frame_offsets[i]);
+ ANIM_GetFrameOffset(anim_resdata, anim_resdata_len, i + 1, &new_anim->frame_offsets[i]);
}
} else {
new_anim->cur_frame_p = anim_resdata + SAGA_FRAME_HEADER_LEN;
new_anim->cur_frame_len = anim_resdata_len - SAGA_FRAME_HEADER_LEN;
- ANIM_GetNumFrames(anim_resdata, &new_anim->n_frames);
+ ANIM_GetNumFrames(anim_resdata, anim_resdata_len, &new_anim->n_frames);
}
// Set animation data
@@ -193,7 +192,7 @@ int ANIM_Play(uint16 anim_id, int vector_time) {
if (anim->play_flag) {
frame = anim->current_frame;
if (GAME_GetGameType() == R_GAMETYPE_ITE) {
- result = ITE_DecodeFrame(anim->resdata, anim->frame_offsets[frame - 1], display_buf,
+ result = ITE_DecodeFrame(anim->resdata, anim->resdata_len, anim->frame_offsets[frame - 1], display_buf,
disp_info.logical_w * disp_info.logical_h);
if (result != R_SUCCESS) {
R_printf(R_STDERR, "ANIM_Play: Error decoding frame %u", anim->current_frame);
@@ -346,7 +345,7 @@ int ANIM_Free(uint16 anim_id) {
// sometimes less than number present in the .nframes member of the
// animation header. For this reason, the function attempts to find
// the last valid frame number, which it returns via 'n_frames'
-int ANIM_GetNumFrames(const byte *anim_resource, uint16 *n_frames) {
+int ANIM_GetNumFrames(const byte *anim_resource, size_t anim_resource_len, uint16 *n_frames) {
R_ANIMATION_HEADER ah;
size_t offset;
@@ -354,19 +353,19 @@ int ANIM_GetNumFrames(const byte *anim_resource, uint16 *n_frames) {
int x;
- const byte *read_p = anim_resource;
-
if (!AnimInfo.initialized) {
return R_FAILURE;
}
- ah.magic = ys_read_u16_le(read_p, &read_p);
- ah.screen_w = ys_read_u16_le(read_p, &read_p);
- ah.screen_h = ys_read_u16_le(read_p, &read_p);
+ MemoryReadStream *readS = new MemoryReadStream(anim_resource, anim_resource_len);
+
+ ah.magic = readS->readUint16LE();
+ ah.screen_w = readS->readUint16LE();
+ ah.screen_h = readS->readUint16LE();
- ah.unknown06 = ys_read_u8(read_p, &read_p);
- ah.unknown07 = ys_read_u8(read_p, &read_p);
- ah.nframes = ys_read_u8(read_p, NULL);
+ ah.unknown06 = readS->readByte();
+ ah.unknown07 = readS->readByte();
+ ah.nframes = readS->readByte();
if (GAME_GetGameType() == R_GAMETYPE_IHNM) {
*n_frames = ah.nframes;
@@ -374,7 +373,7 @@ int ANIM_GetNumFrames(const byte *anim_resource, uint16 *n_frames) {
if (ah.magic == 68) {
for (x = ah.nframes; x > 0; x--) {
- if (ANIM_GetFrameOffset(anim_resource, x, &offset) != R_SUCCESS) {
+ if (ANIM_GetFrameOffset(anim_resource, anim_resource_len, x, &offset) != R_SUCCESS) {
return R_FAILURE;
}
@@ -391,11 +390,10 @@ int ANIM_GetNumFrames(const byte *anim_resource, uint16 *n_frames) {
return R_FAILURE;
}
-int ITE_DecodeFrame(const byte * resdata, size_t frame_offset, byte * buf, size_t buf_len) {
+int ITE_DecodeFrame(const byte *resdata, size_t resdata_len, size_t frame_offset, byte *buf, size_t buf_len) {
R_ANIMATION_HEADER ah;
R_FRAME_HEADER fh;
- const byte *read_p = resdata;
byte *write_p;
uint16 magic;
@@ -421,16 +419,17 @@ int ITE_DecodeFrame(const byte * resdata, size_t frame_offset, byte * buf, size_
return R_FAILURE;
}
+ MemoryReadStream *readS = new MemoryReadStream(resdata, resdata_len);
// Read animation header
- ah.magic = ys_read_u16_le(read_p, &read_p);
- ah.screen_w = ys_read_u16_le(read_p, &read_p);
- ah.screen_h = ys_read_u16_le(read_p, &read_p);
- ah.unknown06 = ys_read_u8(read_p, &read_p);
- ah.unknown07 = ys_read_u8(read_p, &read_p);
- ah.nframes = ys_read_u8(read_p, &read_p);
- ah.flags = ys_read_u8(read_p, &read_p);
- ah.unknown10 = ys_read_u8(read_p, &read_p);
- ah.unknown11 = ys_read_u8(read_p, &read_p);
+ ah.magic = readS->readUint16LE();
+ ah.screen_w = readS->readUint16LE();
+ ah.screen_h = readS->readUint16LE();
+ ah.unknown06 = readS->readByte();
+ ah.unknown07 = readS->readByte();
+ ah.nframes = readS->readByte();
+ ah.flags = readS->readByte();
+ ah.unknown10 = readS->readByte();
+ ah.unknown11 = readS->readByte();
screen_w = ah.screen_w;
screen_h = ah.screen_h;
@@ -442,10 +441,10 @@ int ITE_DecodeFrame(const byte * resdata, size_t frame_offset, byte * buf, size_
}
// Read frame header
- read_p = resdata + frame_offset;
+ readS = new MemoryReadStream(resdata + frame_offset, resdata_len - frame_offset);
// Check for frame magic byte
- magic = ys_read_u8(read_p, &read_p);
+ magic = readS->readByte();
if (magic != SAGA_FRAME_HEADER_MAGIC) {
R_printf(R_STDERR, "ITE_DecodeFrame: Invalid frame offset.\n");
return R_FAILURE;
@@ -455,13 +454,13 @@ int ITE_DecodeFrame(const byte * resdata, size_t frame_offset, byte * buf, size_
// endian format, but the actual RLE encoded frame data,
// including the frame header, is in big endian format.
- fh.x_start = ys_read_u16_be(read_p, &read_p);
- fh.y_start = ys_read_u8(read_p, &read_p);
- read_p++; /* Skip pad byte */
- fh.x_pos = ys_read_u16_be(read_p, &read_p);
- fh.y_pos = ys_read_u16_be(read_p, &read_p);
- fh.width = ys_read_u16_be(read_p, &read_p);
- fh.height = ys_read_u16_be(read_p, &read_p);
+ fh.x_start = readS->readUint16BE();
+ fh.y_start = readS->readByte();
+ readS->readByte(); /* Skip pad byte */
+ fh.x_pos = readS->readUint16BE();
+ fh.y_pos = readS->readUint16BE();
+ fh.width = readS->readUint16BE();
+ fh.height = readS->readUint16BE();
x_start = fh.x_start;
y_start = fh.y_start;
@@ -471,36 +470,36 @@ int ITE_DecodeFrame(const byte * resdata, size_t frame_offset, byte * buf, size_
// Begin RLE decompression to output buffer
do {
- mark_byte = ys_read_u8(read_p, &read_p);
+ mark_byte = readS->readByte();
switch (mark_byte) {
case 0x10: // Long Unencoded Run
- runcount = ys_read_s16_be(read_p, &read_p);
+ runcount = readS->readSint16BE();
for (i = 0; i < runcount; i++) {
- if (*read_p != 0) {
- *write_p = *read_p;
+ data_byte = readS->readByte();
+ if (data_byte != 0) {
+ *write_p = data_byte;
}
write_p++;
- read_p++;
}
continue;
break;
case 0x20: // Long encoded run
- runcount = ys_read_s16_be(read_p, &read_p);
- data_byte = *read_p++;
+ runcount = readS->readSint16BE();
+ data_byte = readS->readByte();
for (i = 0; i < runcount; i++) {
*write_p++ = data_byte;
}
continue;
break;
case 0x2F: // End of row
- x_vector = ys_read_s16_be(read_p, &read_p);
- new_row = ys_read_u8(read_p, &read_p);
+ x_vector = readS->readSint16BE();
+ new_row = readS->readByte();
// Set write pointer to the new draw origin
write_p = buf + ((y_start + new_row) * screen_w) + x_start + x_vector;
continue;
break;
case 0x30: // Reposition command
- x_vector = ys_read_s16_be(read_p, &read_p);
+ x_vector = readS->readSint16BE();
write_p += x_vector;
continue;
break;
@@ -524,7 +523,7 @@ int ITE_DecodeFrame(const byte * resdata, size_t frame_offset, byte * buf, size_
case 0x80: // 1000 0000
// Run of compressed data
runcount = param_ch + 1;
- data_byte = *read_p++;
+ data_byte = readS->readByte();
for (i = 0; i < runcount; i++) {
*write_p++ = data_byte;
}
@@ -534,11 +533,11 @@ int ITE_DecodeFrame(const byte * resdata, size_t frame_offset, byte * buf, size_
// Uncompressed run
runcount = param_ch + 1;
for (i = 0; i < runcount; i++) {
- if (*read_p != 0) {
- *write_p = *read_p;
+ data_byte = readS->readByte();
+ if (data_byte != 0) {
+ *write_p = data_byte;
}
write_p++;
- read_p++;
}
continue;
break;
@@ -571,8 +570,7 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
size_t in_ch_offset;
- const byte *inbuf_p = thisf_p;
- size_t inbuf_remain = thisf_len;
+ MemoryReadStream *readS = new MemoryReadStream(thisf_p, thisf_len);
byte *outbuf_p = decode_buf;
byte *outbuf_endp = (decode_buf + decode_buf_len) - 1;
@@ -585,9 +583,8 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
*nextf_p = NULL;
for (; cont_flag; decoded_data = 1) {
- in_ch_offset = (size_t) (inbuf_p - thisf_p);
- in_ch = *inbuf_p++;
- inbuf_remain--;
+ in_ch_offset = readS->tell();
+ in_ch = readS->readByte();
switch (in_ch) {
case 0x0F: // 15: Frame header
{
@@ -598,20 +595,18 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
int param5;
int param6;
- if (inbuf_remain < 13) {
+ if (thisf_len - readS->tell() < 13) {
R_printf(R_STDERR, "0x%02X: Input buffer underrun.", in_ch);
return R_FAILURE;
}
- param1 = ys_read_u16_be(inbuf_p, &inbuf_p);
- param2 = ys_read_u16_be(inbuf_p, &inbuf_p);
- inbuf_p++; // skip 1?
- param3 = ys_read_u16_be(inbuf_p, &inbuf_p);
- param4 = ys_read_u16_be(inbuf_p, &inbuf_p);
- param5 = ys_read_u16_be(inbuf_p, &inbuf_p);
- param6 = ys_read_u16_be(inbuf_p, &inbuf_p);
-
- inbuf_remain -= 13;
+ param1 = readS->readUint16BE();
+ param2 = readS->readUint16BE();
+ readS->readByte(); // skip 1?
+ param3 = readS->readUint16BE();
+ param4 = readS->readUint16BE();
+ param5 = readS->readUint16BE();
+ param6 = readS->readUint16BE();
x_origin = param1;
y_origin = param2;
@@ -629,8 +624,8 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
}
break;
case 0x10: // Long Unencoded Run
- runcount = ys_read_s16_be(inbuf_p, &inbuf_p);
- if (inbuf_remain < runcount) {
+ runcount = readS->readSint16BE();
+ if (thisf_len - readS->tell() < runcount) {
R_printf(R_STDERR, "0x%02X: Input buffer underrun.", in_ch);
return R_FAILURE;
}
@@ -640,64 +635,62 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
}
for (c = 0; c < runcount; c++) {
- if (*inbuf_p != 0) {
- *outbuf_p = *inbuf_p;
+ data_pixel = readS->readByte();
+ if (data_pixel != 0) {
+ *outbuf_p = data_pixel;
}
outbuf_p++;
- inbuf_p++;
}
- inbuf_remain -= runcount;
outbuf_remain -= runcount;
continue;
break;
case 0x1F: // 31: Unusued?
- if (inbuf_remain < 3) {
+ if (thisf_len - readS->tell() < 3) {
R_printf(R_STDERR, "0x%02X: Input buffer underrun.", in_ch);
return R_FAILURE;
}
- inbuf_p += 3;
- inbuf_remain -= 3;
+ readS->readByte();
+ readS->readByte();
+ readS->readByte();
continue;
break;
case 0x20: // Long compressed run
- if (inbuf_remain <= 3) {
+ if (thisf_len - readS->tell() <= 3) {
R_printf(R_STDERR, "0x%02X: Input buffer underrun.", in_ch);
return R_FAILURE;
}
- runcount = ys_read_s16_be(inbuf_p, &inbuf_p);
- data_pixel = *inbuf_p++;
+ runcount = readS->readSint16BE();
+ data_pixel = readS->readByte();
for (c = 0; c < runcount; c++) {
*outbuf_p++ = data_pixel;
}
outbuf_remain -= runcount;
- inbuf_remain -= 1;
continue;
break;
case 0x2F: // End of row
- if (inbuf_remain <= 4) {
+ if (thisf_len - readS->tell() <= 4) {
return R_FAILURE;
}
- x_vector = ys_read_s16_be(inbuf_p, &inbuf_p);
- new_row = ys_read_s16_be(inbuf_p, &inbuf_p);
+ x_vector = readS->readSint16BE();
+ new_row = readS->readSint16BE();
outbuf_p = decode_buf + ((y_origin + new_row) * di.logical_w) + x_origin + x_vector;
- inbuf_remain -= 4;
outbuf_remain = (outbuf_endp - outbuf_p) + 1;
continue;
break;
case 0x30: // Reposition command
- if (inbuf_remain < 2) {
+ if (thisf_len - readS->tell() < 2) {
return R_FAILURE;
}
- x_vector = ys_read_s16_be(inbuf_p, &inbuf_p);
+ x_vector = readS->readSint16BE();
if (((x_vector > 0) && ((size_t) x_vector > outbuf_remain)) || (-x_vector > outbuf_p - decode_buf)) {
R_printf(R_STDERR, "0x30: Invalid x_vector.\n");
@@ -706,15 +699,14 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
outbuf_p += x_vector;
outbuf_remain -= x_vector;
- inbuf_remain -= 2;
continue;
break;
case 0x3F: // 68: Frame end marker
printf("0x3F: Frame end marker\n");
- if (decoded_data && inbuf_remain > 0) {
- *nextf_p = inbuf_p;
- *nextf_len = inbuf_remain;
+ if (decoded_data && (thisf_len - readS->tell() > 0)) {
+ *nextf_p = thisf_p + readS->tell();
+ *nextf_len = thisf_len - readS->tell();
} else {
*nextf_p = NULL;
*nextf_len = 0;
@@ -744,15 +736,13 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
break;
case 0x80: // Run of compressed data
runcount = param_ch + 1;
- if ((outbuf_remain < runcount) || (inbuf_remain <= 1)) {
+ if ((outbuf_remain < runcount) || (thisf_len - readS->tell() <= 1)) {
return R_FAILURE;
}
- data_pixel = *inbuf_p++;
- inbuf_remain--;
+ data_pixel = readS->readByte();
for (c = 0; c < runcount; c++) {
-
*outbuf_p++ = data_pixel;
}
@@ -761,19 +751,18 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
break;
case 0x40: // Uncompressed run
runcount = param_ch + 1;
- if ((outbuf_remain < runcount) || (inbuf_remain < runcount)) {
+ if ((outbuf_remain < runcount) || (thisf_len - readS->tell() < runcount)) {
return R_FAILURE;
}
for (c = 0; c < runcount; c++) {
- if (*inbuf_p != 0) {
- *outbuf_p = *inbuf_p;
+ data_pixel = readS->readByte();
+ if (data_pixel != 0) {
+ *outbuf_p = data_pixel;
}
outbuf_p++;
- inbuf_p++;
}
- inbuf_remain -= runcount;
outbuf_remain -= runcount;
continue;
@@ -787,34 +776,35 @@ int IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *thisf_
return R_SUCCESS;
}
-int ANIM_GetFrameOffset(const byte *resdata, uint16 find_frame, size_t *frame_offset_p) {
+int ANIM_GetFrameOffset(const byte *resdata, size_t resdata_len, uint16 find_frame, size_t *frame_offset_p) {
R_ANIMATION_HEADER ah;
uint16 num_frames;
uint16 current_frame;
- const byte *read_p = resdata;
- const byte *search_ptr;
-
byte mark_byte;
uint16 control;
uint16 runcount;
uint16 magic;
+ int i;
+
if (!AnimInfo.initialized) {
return R_FAILURE;
}
+ MemoryReadStream *readS = new MemoryReadStream(resdata, resdata_len);
+
// Read animation header
- ah.magic = ys_read_u16_le(read_p, &read_p);
- ah.screen_w = ys_read_u16_le(read_p, &read_p);
- ah.screen_h = ys_read_u16_le(read_p, &read_p);
- ah.unknown06 = ys_read_u8(read_p, &read_p);
- ah.unknown07 = ys_read_u8(read_p, &read_p);
- ah.nframes = ys_read_u8(read_p, &read_p);
- ah.flags = ys_read_u8(read_p, &read_p);
- ah.unknown10 = ys_read_u8(read_p, &read_p);
- ah.unknown11 = ys_read_u8(read_p, &read_p);
+ ah.magic = readS->readUint16LE();
+ ah.screen_w = readS->readUint16LE();
+ ah.screen_h = readS->readUint16LE();
+ ah.unknown06 = readS->readByte();
+ ah.unknown07 = readS->readByte();
+ ah.nframes = readS->readByte();
+ ah.flags = readS->readByte();
+ ah.unknown10 = readS->readByte();
+ ah.unknown11 = readS->readByte();
num_frames = ah.nframes;
@@ -822,42 +812,48 @@ int ANIM_GetFrameOffset(const byte *resdata, uint16 find_frame, size_t *frame_of
return R_FAILURE;
}
- search_ptr = read_p;
for (current_frame = 1; current_frame < find_frame; current_frame++) {
- magic = ys_read_u8(search_ptr, &search_ptr);
+ magic = readS->readByte();
if (magic != SAGA_FRAME_HEADER_MAGIC) {
// Frame sync failure. Magic Number not found
return R_FAILURE;
}
- search_ptr += SAGA_FRAME_HEADER_LEN;
+ // skip header
+ for (i = 0; i < SAGA_FRAME_HEADER_LEN; i++)
+ readS->readByte();
+
// For some strange reason, the animation header is in little
// endian format, but the actual RLE encoded frame data,
// including the frame header, is in big endian format. */
do {
- mark_byte = *search_ptr;
+ mark_byte = readS->readByte();
switch (mark_byte) {
case 0x3F: // End of frame marker
- search_ptr++;
continue;
break;
case 0x30: // Reposition command
- search_ptr += 3;
+ readS->readByte();
+ readS->readByte();
continue;
break;
case 0x2F: // End of row marker
- search_ptr += 4;
+ readS->readByte();
+ readS->readByte();
+ readS->readByte();
continue;
break;
case 0x20: // Long compressed run marker
- search_ptr += 4;
+ readS->readByte();
+ readS->readByte();
+ readS->readByte();
continue;
break;
case 0x10: // (16) 0001 0000
// Long Uncompressed Run
- search_ptr++;
- runcount = ys_read_s16_be(search_ptr, &search_ptr);
- search_ptr += runcount;
+ runcount = readS->readSint16BE();
+ for (i = 0; i < runcount; i++)
+ readS->readByte();
continue;
break;
default:
@@ -869,19 +865,18 @@ int ANIM_GetFrameOffset(const byte *resdata, uint16 find_frame, size_t *frame_of
switch (control) {
case 0xC0:
// Run of empty pixels
- search_ptr++;
continue;
break;
case 0x80:
// Run of compressed data
- search_ptr += 2; // Skip data byte
+ readS->readByte(); // Skip data byte
continue;
break;
case 0x40:
// Uncompressed run
- search_ptr++;
runcount = (mark_byte & 0x3f) + 1;
- search_ptr += runcount;
+ for (i = 0; i < runcount; i++)
+ readS->readByte();
continue;
break;
default:
@@ -892,7 +887,7 @@ int ANIM_GetFrameOffset(const byte *resdata, uint16 find_frame, size_t *frame_of
} while (mark_byte != 63);
}
- *frame_offset_p = (search_ptr - resdata);
+ *frame_offset_p = readS->tell();
return R_SUCCESS;
}
@@ -901,8 +896,8 @@ static void CF_anim_info(int argc, char *argv[]) {
uint16 i;
uint16 idx;
- YS_IGNORE_PARAM(argc);
- YS_IGNORE_PARAM(argv);
+ (void)(argc);
+ (void)(argv);
anim_ct = AnimInfo.anim_count;
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-27 17:51:49 +0000