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Diffstat (limited to 'saga/animation.cpp')
-rw-r--r--saga/animation.cpp162
1 files changed, 96 insertions, 66 deletions
diff --git a/saga/animation.cpp b/saga/animation.cpp
index 7768ad2294..b92d81f296 100644
--- a/saga/animation.cpp
+++ b/saga/animation.cpp
@@ -31,6 +31,7 @@
#include "saga/render.h"
#include "saga/animation.h"
+#include "saga/stream.h"
namespace Saga {
@@ -105,7 +106,7 @@ int Anim::load(const byte *anim_resdata, size_t anim_resdata_len, uint16 *anim_i
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_p = anim_resdata + SAGA_FRAME_HEADER_LEN; // ? len - may vary
new_anim->cur_frame_len = anim_resdata_len - SAGA_FRAME_HEADER_LEN;
getNumFrames(anim_resdata, anim_resdata_len, &new_anim->n_frames);
}
@@ -372,12 +373,13 @@ int Anim::getNumFrames(const byte *anim_resource, size_t anim_resource_len, uint
if (!_initialized) {
return FAILURE;
}
+
- MemoryReadStream readS(anim_resource, anim_resource_len);
+ MemoryReadStreamEndian readS(anim_resource, anim_resource_len, IS_BIG_ENDIAN);
- ah.magic = readS.readUint16LE();
- ah.screen_w = readS.readUint16LE();
- ah.screen_h = readS.readUint16LE();
+ ah.magic = readS.readUint16LE(); // cause ALWAYS LE
+ ah.screen_w = readS.readUint16();
+ ah.screen_h = readS.readUint16();
ah.unknown06 = readS.readByte();
ah.unknown07 = readS.readByte();
@@ -394,7 +396,7 @@ int Anim::getNumFrames(const byte *anim_resource, size_t anim_resource_len, uint
}
magic = *(anim_resource + offset);
- if (magic == SAGA_FRAME_HEADER_MAGIC) {
+ if (magic == SAGA_FRAME_START) {
*n_frames = x;
return SUCCESS;
}
@@ -435,11 +437,11 @@ int Anim::ITE_DecodeFrame(const byte *resdata, size_t resdata_len, size_t frame_
return FAILURE;
}
- MemoryReadStream headerReadS(resdata, resdata_len);
+ MemoryReadStreamEndian headerReadS(resdata, resdata_len, IS_BIG_ENDIAN);
// Read animation header
ah.magic = headerReadS.readUint16LE();
- ah.screen_w = headerReadS.readUint16LE();
- ah.screen_h = headerReadS.readUint16LE();
+ ah.screen_w = headerReadS.readUint16();
+ ah.screen_h = headerReadS.readUint16();
ah.unknown06 = headerReadS.readByte();
ah.unknown07 = headerReadS.readByte();
ah.nframes = headerReadS.readByte();
@@ -456,22 +458,21 @@ int Anim::ITE_DecodeFrame(const byte *resdata, size_t resdata_len, size_t frame_
return FAILURE;
}
- // Read frame header
MemoryReadStream readS(resdata + frame_offset, resdata_len - frame_offset);
// Check for frame magic byte
magic = readS.readByte();
- if (magic != SAGA_FRAME_HEADER_MAGIC) {
+ if (magic != SAGA_FRAME_START) {
warning("ITE_DecodeFrame: Invalid frame offset");
return FAILURE;
}
- // 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.
fh.x_start = readS.readUint16BE();
- fh.y_start = readS.readByte();
+ if (IS_MAC_VERSION)
+ fh.y_start = readS.readUint16BE();
+ else
+ fh.y_start = readS.readByte();
readS.readByte(); /* Skip pad byte */
fh.x_pos = readS.readUint16BE();
fh.y_pos = readS.readUint16BE();
@@ -481,14 +482,25 @@ int Anim::ITE_DecodeFrame(const byte *resdata, size_t resdata_len, size_t frame_
x_start = fh.x_start;
y_start = fh.y_start;
+#if 1
+#define VALIDATE_WRITE_POINTER \
+ if ((write_p < buf) || (write_p >= (buf + screen_w * screen_h))) { \
+ warning("VALIDATE_WRITE_POINTER: write_p=%x buf=%x", write_p, buf); \
+ return FAILURE; \
+ }
+#else
+#define VALIDATE_WRITE_POINTER
+#endif
+
// Setup write pointer to the draw origin
write_p = (buf + (y_start * screen_w) + x_start);
+ VALIDATE_WRITE_POINTER;
// Begin RLE decompression to output buffer
do {
mark_byte = readS.readByte();
switch (mark_byte) {
- case 0x10: // Long Unencoded Run
+ case SAGA_FRAME_LONG_UNCOMPRESSED_RUN: // Long Unencoded Run
runcount = readS.readSint16BE();
for (i = 0; i < runcount; i++) {
data_byte = readS.readByte();
@@ -496,30 +508,39 @@ int Anim::ITE_DecodeFrame(const byte *resdata, size_t resdata_len, size_t frame_
*write_p = data_byte;
}
write_p++;
+ VALIDATE_WRITE_POINTER;
}
continue;
break;
- case 0x20: // Long encoded run
+ case SAGA_FRAME_LONG_COMPRESSED_RUN: // Long encoded run
runcount = readS.readSint16BE();
data_byte = readS.readByte();
for (i = 0; i < runcount; i++) {
*write_p++ = data_byte;
+ VALIDATE_WRITE_POINTER;
}
continue;
break;
- case 0x2F: // End of row
+ case SAGA_FRAME_ROW_END: // End of row
x_vector = readS.readSint16BE();
- new_row = readS.readByte();
+
+ if (IS_MAC_VERSION)
+ new_row = readS.readSint16BE();
+ else
+ 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;
+ VALIDATE_WRITE_POINTER;
continue;
break;
- case 0x30: // Reposition command
+ case SAGA_FRAME_REPOSITION: // Reposition command
x_vector = readS.readSint16BE();
write_p += x_vector;
+ VALIDATE_WRITE_POINTER;
continue;
break;
- case 0x3F: // End of frame marker
+ case SAGA_FRAME_END: // End of frame marker
return SUCCESS;
break;
default:
@@ -530,22 +551,24 @@ int Anim::ITE_DecodeFrame(const byte *resdata, size_t resdata_len, size_t frame_
control_ch = mark_byte & 0xC0U;
param_ch = mark_byte & 0x3FU;
switch (control_ch) {
- case 0xC0: // 1100 0000
+ case SAGA_FRAME_EMPTY_RUN: // 1100 0000
// Run of empty pixels
runcount = param_ch + 1;
write_p += runcount;
+ VALIDATE_WRITE_POINTER;
continue;
break;
- case 0x80: // 1000 0000
+ case SAGA_FRAME_COMPRESSED_RUN: // 1000 0000
// Run of compressed data
runcount = param_ch + 1;
data_byte = readS.readByte();
for (i = 0; i < runcount; i++) {
*write_p++ = data_byte;
+ VALIDATE_WRITE_POINTER;
}
continue;
break;
- case 0x40: // 0100 0000
+ case SAGA_FRAME_UNCOMPRESSED_RUN: // 0100 0000
// Uncompressed run
runcount = param_ch + 1;
for (i = 0; i < runcount; i++) {
@@ -554,6 +577,7 @@ int Anim::ITE_DecodeFrame(const byte *resdata, size_t resdata_len, size_t frame_
*write_p = data_byte;
}
write_p++;
+ VALIDATE_WRITE_POINTER;
}
continue;
break;
@@ -586,7 +610,7 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
size_t in_ch_offset;
- MemoryReadStream readS(thisf_p, thisf_len);
+ MemoryReadStreamEndian readS(thisf_p, thisf_len, !IS_BIG_ENDIAN); // RLE has inversion BE<>LE
byte *outbuf_p = decode_buf;
byte *outbuf_endp = (decode_buf + decode_buf_len) - 1;
@@ -616,13 +640,13 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
return FAILURE;
}
- param1 = readS.readUint16BE();
- param2 = readS.readUint16BE();
+ param1 = readS.readUint16();
+ param2 = readS.readUint16();
readS.readByte(); // skip 1?
- param3 = readS.readUint16BE();
- param4 = readS.readUint16BE();
- param5 = readS.readUint16BE();
- param6 = readS.readUint16BE();
+ param3 = readS.readUint16();
+ param4 = readS.readUint16();
+ param5 = readS.readUint16();
+ param6 = readS.readUint16();
x_origin = param1;
y_origin = param2;
@@ -639,8 +663,8 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
continue;
}
break;
- case 0x10: // Long Unencoded Run
- runcount = readS.readSint16BE();
+ case SAGA_FRAME_LONG_UNCOMPRESSED_RUN: // Long Unencoded Run
+ runcount = readS.readSint16();
if (thisf_len - readS.pos() < runcount) {
warning("0x%02X: Input buffer underrun", in_ch);
return FAILURE;
@@ -672,13 +696,13 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
readS.readByte();
continue;
break;
- case 0x20: // Long compressed run
+ case SAGA_FRAME_LONG_COMPRESSED_RUN: // Long compressed run
if (thisf_len - readS.pos() <= 3) {
warning("0x%02X: Input buffer underrun", in_ch);
return FAILURE;
}
- runcount = readS.readSint16BE();
+ runcount = readS.readSint16();
data_pixel = readS.readByte();
for (c = 0; c < runcount; c++) {
@@ -689,27 +713,27 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
continue;
break;
- case 0x2F: // End of row
+ case SAGA_FRAME_ROW_END: // End of row
if (thisf_len - readS.pos() <= 4) {
return FAILURE;
}
- x_vector = readS.readSint16BE();
- new_row = readS.readSint16BE();
+ x_vector = readS.readSint16();
+ new_row = readS.readSint16();
outbuf_p = decode_buf + ((y_origin + new_row) * di.logical_w) + x_origin + x_vector;
outbuf_remain = (outbuf_endp - outbuf_p) + 1;
continue;
break;
- case 0x30: // Reposition command
+ case SAGA_FRAME_REPOSITION: // Reposition command
if (thisf_len - readS.pos() < 2) {
return FAILURE;
}
- x_vector = readS.readSint16BE();
+ x_vector = readS.readSint16();
if (((x_vector > 0) && ((size_t) x_vector > outbuf_remain)) || (-x_vector > outbuf_p - decode_buf)) {
- warning("0x30: Invalid x_vector");
+ warning("SAGA_FRAME_REPOSITION: Invalid x_vector");
return FAILURE;
}
@@ -718,8 +742,8 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
continue;
break;
- case 0x3F: // 68: Frame end marker
- debug(1, "0x3F: Frame end marker");
+ case SAGA_FRAME_END: // Frame end marker
+ debug(1, "SAGA_FRAME_END: Frame end marker");
if (decoded_data && (thisf_len - readS.pos() > 0)) {
*nextf_p = thisf_p + readS.pos();
*nextf_len = thisf_len - readS.pos();
@@ -740,7 +764,7 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
param_ch = in_ch & 0x3f;
switch (control_ch) {
- case 0xC0: // Run of empty pixels
+ case SAGA_FRAME_EMPTY_RUN: // Run of empty pixels
runcount = param_ch + 1;
if (outbuf_remain < runcount) {
return FAILURE;
@@ -750,7 +774,7 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
outbuf_remain -= runcount;
continue;
break;
- case 0x80: // Run of compressed data
+ case SAGA_FRAME_COMPRESSED_RUN: // Run of compressed data
runcount = param_ch + 1;
if ((outbuf_remain < runcount) || (thisf_len - readS.pos() <= 1)) {
return FAILURE;
@@ -765,7 +789,7 @@ int Anim::IHNM_DecodeFrame(byte *decode_buf, size_t decode_buf_len, const byte *
outbuf_remain -= runcount;
continue;
break;
- case 0x40: // Uncompressed run
+ case SAGA_FRAME_UNCOMPRESSED_RUN: // Uncompressed run
runcount = param_ch + 1;
if ((outbuf_remain < runcount) || (thisf_len - readS.pos() < runcount)) {
return FAILURE;
@@ -809,12 +833,13 @@ int Anim::getFrameOffset(const byte *resdata, size_t resdata_len, uint16 find_fr
return FAILURE;
}
- MemoryReadStream readS(resdata, resdata_len);
+
+ MemoryReadStreamEndian readS(resdata, resdata_len, IS_BIG_ENDIAN);
// Read animation header
ah.magic = readS.readUint16LE();
- ah.screen_w = readS.readUint16LE();
- ah.screen_h = readS.readUint16LE();
+ ah.screen_w = readS.readUint16();
+ ah.screen_h = readS.readUint16();
ah.unknown06 = readS.readByte();
ah.unknown07 = readS.readByte();
ah.nframes = readS.readByte();
@@ -828,9 +853,11 @@ int Anim::getFrameOffset(const byte *resdata, size_t resdata_len, uint16 find_fr
return FAILURE;
}
+ readS._bigEndian = !IS_BIG_ENDIAN; // RLE has inversion BE<>LE
+
for (current_frame = 1; current_frame < find_frame; current_frame++) {
magic = readS.readByte();
- if (magic != SAGA_FRAME_HEADER_MAGIC) {
+ if (magic != SAGA_FRAME_START) {
// Frame sync failure. Magic Number not found
return FAILURE;
}
@@ -839,33 +866,36 @@ int Anim::getFrameOffset(const byte *resdata, size_t resdata_len, uint16 find_fr
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 = readS.readByte();
+// debug(7, "_pos=%x mark_byte=%x", readS.pos(), mark_byte);
+
switch (mark_byte) {
- case 0x3F: // End of frame marker
+ case SAGA_FRAME_END: // End of frame marker
continue;
break;
- case 0x30: // Reposition command
- readS.readByte();
- readS.readByte();
+ case SAGA_FRAME_REPOSITION: // Reposition command
+ readS.readSint16BE();
continue;
break;
- case 0x2F: // End of row marker
- readS.readByte();
- readS.readByte();
- readS.readByte();
+ case SAGA_FRAME_ROW_END: // End of row marker
+ readS.readSint16BE();
+ if (IS_MAC_VERSION)
+ readS.readSint16BE();
+ else
+ readS.readByte();
continue;
break;
- case 0x20: // Long compressed run marker
- readS.readByte();
- readS.readByte();
+ case SAGA_FRAME_LONG_COMPRESSED_RUN: // Long compressed run marker
+ readS.readSint16BE();
readS.readByte();
continue;
break;
- case 0x10: // (16) 0001 0000
+ case SAGA_FRAME_LONG_UNCOMPRESSED_RUN: // (16) 0001 0000
// Long Uncompressed Run
runcount = readS.readSint16BE();
for (i = 0; i < runcount; i++)
@@ -879,16 +909,16 @@ int Anim::getFrameOffset(const byte *resdata, size_t resdata_len, uint16 find_fr
// Mask all but two high order (control) bits
control = mark_byte & 0xC0;
switch (control) {
- case 0xC0:
+ case SAGA_FRAME_EMPTY_RUN:
// Run of empty pixels
continue;
break;
- case 0x80:
+ case SAGA_FRAME_COMPRESSED_RUN:
// Run of compressed data
readS.readByte(); // Skip data byte
continue;
break;
- case 0x40:
+ case SAGA_FRAME_UNCOMPRESSED_RUN:
// Uncompressed run
runcount = (mark_byte & 0x3f) + 1;
for (i = 0; i < runcount; i++)
@@ -900,7 +930,7 @@ int Anim::getFrameOffset(const byte *resdata, size_t resdata_len, uint16 find_fr
return FAILURE;
break;
}
- } while (mark_byte != 63);
+ } while (mark_byte != SAGA_FRAME_END);
}
*frame_offset_p = readS.pos();
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-31 05:50:43 +0000