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(svn r13551) -Codechange: store offsets to different zoom levels in a distinguished struct instead in the data stream for 8bpp-optimized

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smatz
2008-06-17 17:25:22 +00:00
parent 4bbe69f881
commit 4e2e078743
4 changed files with 18 additions and 10 deletions
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18
src/blitter/8bpp_optimized.cpp
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@@ -14,10 +14,11 @@ static FBlitter_8bppOptimized iFBlitter_8bppOptimized;
void Blitter_8bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, ZoomLevel zoom)
{
/* Find the offset of this zoom-level */
uint offset = ((const uint8 *)bp->sprite)[(int)(zoom - ZOOM_LVL_BEGIN) * 2] | ((const byte *)bp->sprite)[(int)(zoom - ZOOM_LVL_BEGIN) * 2 + 1] << 8;
const SpriteData *sprite_src = (const SpriteData *)bp->sprite;
uint offset = sprite_src->offset[zoom];
/* Find where to start reading in the source sprite */
const uint8 *src = (const uint8 *)bp->sprite + offset;
const uint8 *src = sprite_src->data + offset;
uint8 *dst_line = (uint8 *)bp->dst + bp->top * bp->pitch + bp->left;
/* Skip over the top lines in the source image */
@@ -101,7 +102,7 @@ void Blitter_8bppOptimized::Draw(Blitter::BlitterParams *bp, BlitterMode mode, Z
Sprite *Blitter_8bppOptimized::Encode(SpriteLoader::Sprite *sprite, Blitter::AllocatorProc *allocator)
{
/* Make memory for all zoom-levels */
uint memory = (int)(ZOOM_LVL_END - ZOOM_LVL_BEGIN) * sizeof(uint16);
uint memory = sizeof(SpriteData);
for (ZoomLevel i = ZOOM_LVL_BEGIN; i < ZOOM_LVL_END; i++) {
memory += UnScaleByZoom(sprite->height, i) * UnScaleByZoom(sprite->width, i);
@@ -109,15 +110,14 @@ Sprite *Blitter_8bppOptimized::Encode(SpriteLoader::Sprite *sprite, Blitter::All
/* We have no idea how much memory we really need, so just guess something */
memory *= 5;
byte *temp_dst = MallocT<byte>(memory);
byte *dst = &temp_dst[(ZOOM_LVL_END - ZOOM_LVL_BEGIN) * 2];
SpriteData *temp_dst = (SpriteData *)MallocT<byte>(memory);
byte *dst = temp_dst->data;
/* Make the sprites per zoom-level */
for (ZoomLevel i = ZOOM_LVL_BEGIN; i < ZOOM_LVL_END; i++) {
/* Store the index table */
uint index = dst - temp_dst;
temp_dst[i * 2] = index & 0xFF;
temp_dst[i * 2 + 1] = (index >> 8) & 0xFF;
uint offset = dst - temp_dst->data;
temp_dst->offset[i] = offset;
/* cache values, because compiler can't cache it */
int scaled_height = UnScaleByZoom(sprite->height, i);
@@ -179,7 +179,7 @@ Sprite *Blitter_8bppOptimized::Encode(SpriteLoader::Sprite *sprite, Blitter::All
}
}
uint size = dst - temp_dst;
uint size = dst - (byte *)temp_dst;
/* Safety check, to make sure we guessed the size correctly */
assert(size < memory);