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animlib: Editorialize the code style a bit more.
git-svn-id: https://svn.eduke32.com/eduke32@6691 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
hendricks266
parent
f10551086b
commit
cd796647d1
1 changed files with 83 additions and 79 deletions
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@ -91,7 +91,7 @@ typedef struct
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uint8_t imagebuffer[IMAGEBUFFERSIZE]; // buffer where anim frame is decoded
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uint8_t * buffer;
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uint8_t pal[768];
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int32_t currentframe;
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int32_t currentframe;
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} anim_t;
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static anim_t * anim = NULL;
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@ -106,26 +106,29 @@ static anim_t * anim = NULL;
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static inline uint16_t findpage(uint16_t framenumber)
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{
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// curlpnum is initialized to 0xffff, obviously
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uint16_t i = (uint16_t)(anim->curlpnum & ~0xffff);
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int32_t j = 0;
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size_t i = anim->curlpnum & ~0xffff;
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size_t const nLps = anim->lpheader->nLps;
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bool j = true;
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if (framenumber < anim->currentframe)
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i = 0, j++;
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i = 0, j = false;
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// this scans the last used page and higher first and then scans the
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// previously accessed pages afterwards if it doesn't find anything
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do
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{
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for (; i<anim->lpheader->nLps; i++)
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if (anim->LpArray[i].baseRecord <= framenumber &&
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anim->LpArray[i].baseRecord + anim->LpArray[i].nRecords > framenumber)
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for (; i < nLps; ++i)
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{
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lp_descriptor & lp = anim->LpArray[i];
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if (lp.baseRecord <= framenumber && framenumber < lp.baseRecord + lp.nRecords)
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return i;
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}
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if (!j && i == anim->lpheader->nLps)
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if (j && i == nLps)
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{
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// handle out of order pages... I don't think any Duke .ANM files
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// have them, but they're part of the file spec
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i = 0, j++;
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i = 0, j = false;
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continue;
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}
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}
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@ -172,54 +175,59 @@ static void decodeframe(uint8_t * srcP, uint8_t * dstP)
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{
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do
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{
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int32_t count=*srcP++;
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{
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/* short op */
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uint8_t count = *srcP++;
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if (!count) /* Short RLE */
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{
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int32_t color = *(srcP+1);
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count = *(uint8_t *)srcP;
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srcP += sizeof(int16_t);
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Bmemset(dstP, color, count);
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dstP += count;
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continue;
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if (!count) /* short RLE */
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{
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uint8_t color = *(srcP+1);
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count = *(uint8_t *)srcP;
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srcP += sizeof(int16_t);
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Bmemset(dstP, color, count);
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dstP += count;
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continue;
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}
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else if ((count & 0x80) == 0) /* short copy */
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{
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Bmemcpy(dstP, srcP, count);
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dstP += count;
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srcP += count;
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continue;
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}
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else if ((count &= ~0x80) > 0) /* short skip */
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{
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dstP += count;
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continue;
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}
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}
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else if ((count & 0x80) == 0) /* Short copy */
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{
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/* long op */
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uint16_t count = B_LITTLE16(B_UNBUF16(srcP));
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srcP += sizeof(int16_t);
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if (!count) /* stop sign */
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return;
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else if ((count & 0x8000) == 0) /* long skip */
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{
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dstP += count;
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continue;
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}
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else if ((count &= ~0x8000) & 0x4000) /* long RLE */
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{
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uint8_t color = *srcP++;
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count &= ~0x4000;
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Bmemset(dstP, color, count);
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dstP += count;
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continue;
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}
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/* long copy */
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Bmemcpy(dstP, srcP, count);
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dstP += count;
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srcP += count;
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continue;
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}
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else if ((count &= ~0x80) > 0) /* short skip */
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{
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dstP += count;
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continue;
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}
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/* long op */
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count = B_LITTLE16(B_UNBUF16(srcP));
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srcP += sizeof(int16_t);
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if (!count) /* stop sign */
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return;
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else if ((count & 0x8000) == 0) /* long skip */
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{
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dstP += count;
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continue;
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}
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else if ((count &= ~0x8000) & 0x4000) /* long RLE */
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{
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int32_t color = *srcP++;
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count &= ~0x4000;
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Bmemset(dstP, color, count);
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dstP += count;
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continue;
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}
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/* long copy */
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Bmemcpy(dstP, srcP, count);
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dstP += count;
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srcP += count;
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}
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while (1);
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}
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@ -234,13 +242,12 @@ static void decodeframe(uint8_t * srcP, uint8_t * dstP)
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static void renderframe(uint16_t framenumber, uint16_t *pagepointer)
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{
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uint8_t *ppointer;
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uint16_t offset = 0;
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uint16_t frame = framenumber - anim->curlp->baseRecord;
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while (frame--) offset += B_LITTLE16(pagepointer[frame]);
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ppointer = (uint8_t *)(pagepointer) + anim->curlp->nRecords*2 + offset + 4;
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uint8_t *ppointer = (uint8_t *)(pagepointer) + anim->curlp->nRecords*2 + offset + 4;
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if ((ppointer-4)[1])
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{
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@ -268,8 +275,6 @@ static inline void drawframe(uint16_t framenumber)
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// <length> is the file size, for consistency checking.
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int32_t ANIM_LoadAnim(uint8_t *buffer, int32_t length)
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{
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int32_t i;
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length -= sizeof(lpfileheader)+128+768;
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if (length < 0)
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return -1;
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@ -280,33 +285,32 @@ int32_t ANIM_LoadAnim(uint8_t *buffer, int32_t length)
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anim->currentframe = -1;
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// this just modifies the data in-place instead of copying it elsewhere now
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anim->lpheader = (lpfileheader *)(anim->buffer = (uint8_t *)buffer);
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lpfileheader & lpheader = *(anim->lpheader = (lpfileheader *)(anim->buffer = buffer));
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anim->lpheader->id = B_LITTLE32(anim->lpheader->id);
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anim->lpheader->maxLps = B_LITTLE16(anim->lpheader->maxLps);
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anim->lpheader->nLps = B_LITTLE16(anim->lpheader->nLps);
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anim->lpheader->nRecords = B_LITTLE32(anim->lpheader->nRecords);
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anim->lpheader->maxRecsPerLp = B_LITTLE16(anim->lpheader->maxRecsPerLp);
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anim->lpheader->lpfTableOffset = B_LITTLE16(anim->lpheader->lpfTableOffset);
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anim->lpheader->contentType = B_LITTLE32(anim->lpheader->contentType);
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anim->lpheader->width = B_LITTLE16(anim->lpheader->width);
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anim->lpheader->height = B_LITTLE16(anim->lpheader->height);
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anim->lpheader->nFrames = B_LITTLE32(anim->lpheader->nFrames);
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anim->lpheader->framesPerSecond = B_LITTLE16(anim->lpheader->framesPerSecond);
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lpheader.id = B_LITTLE32(lpheader.id);
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lpheader.maxLps = B_LITTLE16(lpheader.maxLps);
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lpheader.nLps = B_LITTLE16(lpheader.nLps);
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lpheader.nRecords = B_LITTLE32(lpheader.nRecords);
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lpheader.maxRecsPerLp = B_LITTLE16(lpheader.maxRecsPerLp);
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lpheader.lpfTableOffset = B_LITTLE16(lpheader.lpfTableOffset);
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lpheader.contentType = B_LITTLE32(lpheader.contentType);
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lpheader.width = B_LITTLE16(lpheader.width);
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lpheader.height = B_LITTLE16(lpheader.height);
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lpheader.nFrames = B_LITTLE32(lpheader.nFrames);
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lpheader.framesPerSecond = B_LITTLE16(lpheader.framesPerSecond);
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length -= anim->lpheader->nLps * sizeof(lp_descriptor);
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length -= lpheader.nLps * sizeof(lp_descriptor);
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if (length < 0)
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return -2;
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buffer += sizeof(lpfileheader)+128;
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// load the color palette
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for (i = 0; i < 768; i += 3)
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for (uint8_t * pal = anim->pal, * pal_end = pal+768; pal < pal_end; pal += 3, buffer += 4)
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{
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anim->pal[i+2] = *buffer++;
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anim->pal[i+1] = *buffer++;
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anim->pal[i] = *buffer++;
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buffer++;
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pal[2] = buffer[0];
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pal[1] = buffer[1];
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pal[0] = buffer[2];
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}
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// set up large page descriptors
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@ -314,11 +318,11 @@ int32_t ANIM_LoadAnim(uint8_t *buffer, int32_t length)
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// theoretically we should be able to play files with more than 256 frames now
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// assuming the utilities to create them can make them that way
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for (i = 0; i < anim->lpheader->nLps; i++)
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for (lp_descriptor * lp = anim->LpArray, * lp_end = lp+lpheader.nLps; lp < lp_end; ++lp)
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{
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anim->LpArray[i].baseRecord = B_LITTLE16(anim->LpArray[i].baseRecord);
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anim->LpArray[i].nRecords = B_LITTLE16(anim->LpArray[i].nRecords);
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anim->LpArray[i].nBytes = B_LITTLE16(anim->LpArray[i].nBytes);
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lp->baseRecord = B_LITTLE16(lp->baseRecord);
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lp->nRecords = B_LITTLE16(lp->nRecords);
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lp->nBytes = B_LITTLE16(lp->nBytes);
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}
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return 0;
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@ -339,14 +343,14 @@ int32_t ANIM_NumFrames(void)
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uint8_t * ANIM_DrawFrame(int32_t framenumber)
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{
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bssize_t cnt = anim->currentframe;
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uint32_t cnt = anim->currentframe;
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// handle first play and looping or rewinding
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if (cnt < 0 || cnt > framenumber)
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if (cnt > (uint32_t)framenumber)
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cnt = 0;
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do drawframe(cnt++);
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while (cnt < framenumber);
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while (cnt < (uint32_t)framenumber);
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anim->currentframe = framenumber;
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return anim->imagebuffer;
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