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Codechange: Give sprite encoders a hint which colour components of a sprite are filled with useful information.

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This commit is contained in:
Michael Lutz
2021-01-16 16:43:30 +01:00
parent e7e5316340
commit 70aa3b4011
6 changed files with 21 additions and 10 deletions
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12
src/spriteloader/grf.cpp
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@@ -23,15 +23,6 @@
extern const byte _palmap_w2d[];
/** The different colour components a sprite can have. */
enum SpriteColourComponent {
SCC_RGB = 1 << 0, ///< Sprite has RGB.
SCC_ALPHA = 1 << 1, ///< Sprite has alpha.
SCC_PAL = 1 << 2, ///< Sprite has palette data.
SCC_MASK = SCC_RGB | SCC_ALPHA | SCC_PAL, ///< Mask of valid colour bits.
};
DECLARE_ENUM_AS_BIT_SET(SpriteColourComponent)
/**
* We found a corrupted sprite. This means that the sprite itself
* contains invalid data or is too small for the given dimensions.
@@ -234,6 +225,7 @@ uint8 LoadSpriteV1(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_po
sprite[zoom_lvl].width = FioReadWord();
sprite[zoom_lvl].x_offs = FioReadWord();
sprite[zoom_lvl].y_offs = FioReadWord();
sprite[zoom_lvl].colours = SCC_PAL;
if (sprite[zoom_lvl].width > INT16_MAX) {
WarnCorruptSprite(file_slot, file_pos, __LINE__);
@@ -302,6 +294,8 @@ uint8 LoadSpriteV2(SpriteLoader::Sprite *sprite, uint8 file_slot, size_t file_po
if (colour & SCC_ALPHA) bpp++; // Has alpha data.
if (colour & SCC_PAL) bpp++; // Has palette data.
sprite[zoom_lvl].colours = (SpriteColourComponent)colour;
/* 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[zoom_lvl].width * sprite[zoom_lvl].height * bpp;