mirror of
https://github.com/libretro/ppsspp.git
synced 2024-11-28 10:51:06 +00:00
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
#pragma once
|
|
|
|
#include "base/basictypes.h"
|
|
|
|
// LoadZIM's responsibility:
|
|
// * Parse the ZIM format
|
|
// * Extract all mip levels so they can be uploaded to GPU
|
|
//
|
|
// * NOT convert formats to anything, except converting ETC1 to RGBA8888 when running on the PC
|
|
|
|
// ZIM format:
|
|
// 4 byte ZIMG
|
|
// 4 byte width
|
|
// 4 byte height
|
|
// 4 byte flags
|
|
// Uncompressed or ZLibbed data. If multiple mips, zlibbed separately.
|
|
|
|
// Defined flags:
|
|
|
|
enum {
|
|
ZIM_RGBA8888 = 0, // Assumed format if no other format is set
|
|
ZIM_RGBA4444 = 1, // GL_UNSIGNED_SHORT_4_4_4_4
|
|
ZIM_RGB565 = 2, // GL_UNSIGNED_SHORT_5_6_5
|
|
ZIM_ETC1 = 3,
|
|
ZIM_RGB888 = 4,
|
|
ZIM_LUMINANCE_ALPHA = 5,
|
|
ZIM_LUMINANCE = 6,
|
|
ZIM_ALPHA = 7,
|
|
// There's space for plenty more formats.
|
|
ZIM_FORMAT_MASK = 15,
|
|
ZIM_HAS_MIPS = 16, // If set, assumes that a full mip chain is present. Mips are zlib-compressed individually and stored in sequence. Always half sized.
|
|
ZIM_GEN_MIPS = 32, // If set, the caller is advised to automatically generate mips. (maybe later, the ZIM lib will generate the mips for you).
|
|
ZIM_DITHER = 64, // If set, dithers during save if color reduction is necessary.
|
|
ZIM_CLAMP = 128, // Texture should default to clamp instead of wrap.
|
|
ZIM_ZLIB_COMPRESSED = 256,
|
|
};
|
|
|
|
// ZIM will only ever support up to 12 levels (4096x4096 max).
|
|
enum {
|
|
ZIM_MAX_MIP_LEVELS = 12,
|
|
};
|
|
|
|
// Delete the returned pointer using free()
|
|
// Watch out! If the image has mipmaps, multiple values will be written
|
|
// to width, height, and image, as if they were arrays, up to 12 (max texture size is 4096 which is 2^12).
|
|
int LoadZIM(const char *filename, int *width, int *height, int *flags, uint8_t **image);
|
|
int LoadZIMPtr(char *zim, int datasize, int *width, int *height, int *flags, uint8_t **image);
|