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(svn r23889) -Codechange: Centralise sprite resizing in one place. (peter1138)

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This commit is contained in:
michi_cc
2012-02-04 13:29:13 +00:00
parent 2909e39e99
commit e85d5b5d31
9 changed files with 257 additions and 151 deletions
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73
src/spriteloader/grf.cpp
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@@ -59,9 +59,10 @@ static bool WarnCorruptSprite(uint8 file_slot, size_t file_pos, int line)
* @param sprite_type Type of the sprite we're decoding.
* @param num Size of the decompressed sprite.
* @param type Type of the encoded sprite.
* @param zoom_lvl Requested zoom level.
* @return True if the sprite was successfully loaded.
*/
bool DecodeSingleSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type, int64 num, byte type)
bool DecodeSingleSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type, int64 num, byte type, ZoomLevel zoom_lvl)
{
AutoFreePtr<byte> dest_orig(MallocT<byte>(num));
byte *dest = dest_orig;
@@ -96,7 +97,7 @@ bool DecodeSingleSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t fi
if (num != 0) return WarnCorruptSprite(file_slot, file_pos, __LINE__);
sprite->AllocateData(sprite->width * sprite->height * ZOOM_LVL_BASE * ZOOM_LVL_BASE);
sprite->AllocateData(zoom_lvl, sprite->width * sprite->height);
/* When there are transparency pixels, this format has another trick.. decode it */
if (type & 0x08) {
@@ -161,22 +162,6 @@ bool DecodeSingleSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t fi
}
}
if (ZOOM_LVL_BASE != 1 && sprite_type == ST_NORMAL) {
/* Simple scaling, back-to-front so that no intermediate buffers are needed. */
int width = sprite->width * ZOOM_LVL_BASE;
int height = sprite->height * ZOOM_LVL_BASE;
for (int y = height - 1; y >= 0; y--) {
for (int x = width - 1; x >= 0; x--) {
sprite->data[y * width + x] = sprite->data[y / ZOOM_LVL_BASE * sprite->width + x / ZOOM_LVL_BASE];
}
}
sprite->width *= ZOOM_LVL_BASE;
sprite->height *= ZOOM_LVL_BASE;
sprite->x_offs *= ZOOM_LVL_BASE;
sprite->y_offs *= ZOOM_LVL_BASE;
}
/* Make sure to mark all transparent pixels transparent on the alpha channel too */
for (int i = 0; i < sprite->width * sprite->height; i++) {
if (sprite->data[i].m != 0) sprite->data[i].a = 0xFF;
@@ -185,7 +170,7 @@ bool DecodeSingleSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t fi
return true;
}
bool LoadSpriteV1(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
uint8 LoadSpriteV1(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
{
/* Open the right file and go to the correct position */
FioSeekToFile(file_slot, file_pos);
@@ -195,24 +180,28 @@ bool LoadSpriteV1(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos
byte type = FioReadByte();
/* Type 0xFF indicates either a colourmap or some other non-sprite info; we do not handle them here */
if (type == 0xFF) return false;
if (type == 0xFF) return 0;
sprite->height = FioReadByte();
sprite->width = FioReadWord();
sprite->x_offs = FioReadWord();
sprite->y_offs = FioReadWord();
ZoomLevel zoom_lvl = (sprite_type == ST_NORMAL) ? ZOOM_LVL_OUT_4X : ZOOM_LVL_NORMAL;
sprite[zoom_lvl].height = FioReadByte();
sprite[zoom_lvl].width = FioReadWord();
sprite[zoom_lvl].x_offs = FioReadWord();
sprite[zoom_lvl].y_offs = FioReadWord();
/* 0x02 indicates it is a compressed sprite, so we can't rely on 'num' to be valid.
* In case it is uncompressed, the size is 'num' - 8 (header-size). */
num = (type & 0x02) ? sprite->width * sprite->height : num - 8;
num = (type & 0x02) ? sprite[zoom_lvl].width * sprite[zoom_lvl].height : num - 8;
return DecodeSingleSprite(sprite, file_slot, file_pos, sprite_type, num, type);
if (DecodeSingleSprite(&sprite[zoom_lvl], file_slot, file_pos, sprite_type, num, type, zoom_lvl)) return 1 << zoom_lvl;
return 0;
}
bool LoadSpriteV2(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
uint8 LoadSpriteV2(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
{
/* Is the sprite not present/stripped in the GRF? */
if (file_pos == SIZE_MAX) return false;
if (file_pos == SIZE_MAX) return 0;
/* Open the right file and go to the correct position */
FioSeekToFile(file_slot, file_pos);
@@ -225,27 +214,33 @@ bool LoadSpriteV2(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos
byte type = FioReadByte();
/* Type 0xFF indicates either a colourmap or some other non-sprite info; we do not handle them here. */
if (type == 0xFF) return false;
if (type == 0xFF) return 0;
byte colour = type & SCC_MASK;
byte zoom = FioReadByte();
if (colour == SCC_PAL && zoom == 0) {
sprite->height = FioReadWord();
sprite->width = FioReadWord();
sprite->x_offs = FioReadWord();
sprite->y_offs = FioReadWord();
ZoomLevel zoom_lvl = (sprite_type == ST_NORMAL) ? ZOOM_LVL_OUT_4X : ZOOM_LVL_NORMAL;
sprite[zoom_lvl].height = FioReadWord();
sprite[zoom_lvl].width = FioReadWord();
sprite[zoom_lvl].x_offs = FioReadWord();
sprite[zoom_lvl].y_offs = FioReadWord();
/* Mask out colour information. */
type = type & ~SCC_MASK;
/* For chunked encoding we store the decompressed size in the file,
* otherwise we can calculate it from the image dimensions. */
uint decomp_size = (type & 0x08) ? FioReadDword() : sprite->width * sprite->height;
uint decomp_size = (type & 0x08) ? FioReadDword() : sprite[zoom_lvl].width * sprite[zoom_lvl].height;
bool valid = DecodeSingleSprite(sprite, file_slot, file_pos, sprite_type, decomp_size, type);
if (FioGetPos() != start_pos + num) return WarnCorruptSprite(file_slot, file_pos, __LINE__);
return valid;
bool valid = DecodeSingleSprite(&sprite[zoom_lvl], file_slot, file_pos, sprite_type, decomp_size, type, zoom_lvl);
if (FioGetPos() != start_pos + num) {
WarnCorruptSprite(file_slot, file_pos, __LINE__);
return 0;
}
return 1 << zoom_lvl;
} else {
/* Not the wanted zoom level or colour depth, continue searching. */
FioSkipBytes(num - 2);
@@ -253,10 +248,10 @@ bool LoadSpriteV2(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos
} while (FioReadDword() == id);
return false;
return 0;
}
bool SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
uint8 SpriteLoaderGrf::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
{
if (this->container_ver >= 2) {
return LoadSpriteV2(sprite, file_slot, file_pos, sprite_type);

2
src/spriteloader/grf.hpp
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@@ -19,7 +19,7 @@ class SpriteLoaderGrf : public SpriteLoader {
byte container_ver;
public:
SpriteLoaderGrf(byte container_ver) : container_ver(container_ver) {}
bool LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type);
uint8 LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type);
};
#endif /* SPRITELOADER_GRF_HPP */

30
src/spriteloader/png.cpp
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@@ -51,7 +51,7 @@ static bool OpenPNGFile(const char *filename, uint32 id, bool mask)
return false;
}
static bool LoadPNG(SpriteLoader::Sprite *sprite, const char *filename, uint32 id, volatile bool mask)
static bool LoadPNG(SpriteLoader::Sprite *sprite, const char *filename, uint32 id, volatile bool mask, ZoomLevel zoom)
{
png_byte header[8];
png_structp png_ptr;
@@ -115,7 +115,7 @@ static bool LoadPNG(SpriteLoader::Sprite *sprite, const char *filename, uint32 i
}
sprite->height = height;
sprite->width = width;
sprite->AllocateData(sprite->width * sprite->height * ZOOM_LVL_BASE * ZOOM_LVL_BASE);
sprite->AllocateData(zoom, sprite->width * sprite->height);
} else if (sprite->height != png_get_image_height(png_ptr, info_ptr) || sprite->width != png_get_image_width(png_ptr, info_ptr)) {
/* Make sure the mask image isn't larger than the sprite image. */
DEBUG(misc, 0, "Ignoring mask for SpriteID %d as it isn't the same dimension as the masked sprite", id);
@@ -206,29 +206,15 @@ static bool LoadPNG(SpriteLoader::Sprite *sprite, const char *filename, uint32 i
return true;
}
bool SpriteLoaderPNG::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
uint8 SpriteLoaderPNG::LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type)
{
ZoomLevel zoom_lvl = (sprite_type == ST_NORMAL) ? ZOOM_LVL_OUT_4X : ZOOM_LVL_NORMAL;
const char *filename = FioGetFilename(file_slot);
if (!LoadPNG(sprite, filename, (uint32)file_pos, false)) return false;
if (!LoadPNG(sprite, filename, (uint32)file_pos, true)) return false;
if (!LoadPNG(&sprite[zoom_lvl], filename, (uint32)file_pos, false, zoom_lvl)) return 0;
if (!LoadPNG(&sprite[zoom_lvl], filename, (uint32)file_pos, true, zoom_lvl)) return 0;
if (ZOOM_LVL_BASE != 1 && sprite_type == ST_NORMAL) {
/* Simple scaling, back-to-front so that no intermediate buffers are needed. */
int width = sprite->width * ZOOM_LVL_BASE;
int height = sprite->height * ZOOM_LVL_BASE;
for (int y = height - 1; y >= 0; y--) {
for (int x = width - 1; x >= 0; x--) {
sprite->data[y * width + x] = sprite->data[y / ZOOM_LVL_BASE * sprite->width + x / ZOOM_LVL_BASE];
}
}
sprite->width *= ZOOM_LVL_BASE;
sprite->height *= ZOOM_LVL_BASE;
sprite->x_offs *= ZOOM_LVL_BASE;
sprite->y_offs *= ZOOM_LVL_BASE;
}
return true;
return 1 << zoom_lvl;
}
#endif /* WITH_PNG */

2
src/spriteloader/png.hpp
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@@ -17,7 +17,7 @@
/** Sprite loader for graphics coming from a PNG image. */
class SpriteLoaderPNG : public SpriteLoader {
public:
bool LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type);
uint8 LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type);
};
#endif /* SPRITELOADER_PNG_HPP */

11
src/spriteloader/spriteloader.hpp
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@@ -43,23 +43,24 @@ public:
/**
* Allocate the sprite data of this sprite.
* @param zoom Zoom level to allocate the data for.
* @param size the minimum size of the data field.
*/
void AllocateData(size_t size) { this->data = Sprite::buffer.ZeroAllocate(size); }
void AllocateData(ZoomLevel zoom, size_t size) { this->data = Sprite::buffer[zoom].ZeroAllocate(size); }
private:
/** Allocated memory to pass sprite data around */
static ReusableBuffer<SpriteLoader::CommonPixel> buffer;
static ReusableBuffer<SpriteLoader::CommonPixel> buffer[ZOOM_LVL_COUNT];
};
/**
* Load a sprite from the disk and return a sprite struct which is the same for all loaders.
* @param sprite The sprite to fill with data.
* @param[out] sprite The sprites to fill with data.
* @param file_slot The file "descriptor" of the file we read from.
* @param file_pos The position within the file the image begins.
* @param sprite_type The type of sprite we're trying to load.
* @return true iff loading went okay.
* @return Bit mask of the zoom levels successfully loaded or 0 if no sprite could be loaded.
*/
virtual bool LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type) = 0;
virtual uint8 LoadSprite(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_pos, SpriteType sprite_type) = 0;
virtual ~SpriteLoader() { }
};