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#ifndef _BMPMAN_H
#define _BMPMAN_H
/*
* Copyright (C) Volition, Inc. 1999. All rights reserved.
*
* All source code herein is the property of Volition, Inc. You may not sell
* or otherwise commercially exploit the source or things you created based on the
* source.
*
*/
/**
* @file bmpman.h
* Header file for the bitmap manager (bmpman)
*/
/**
* @example bm_examples.cpp
* @brief This containes examples of bmpman usage
*/
#include "cfile/cfile.h"
#include "globalincs/pstypes.h"
#ifndef NDEBUG
#define BMPMAN_NDEBUG //!< Enables BMPMAN debugging code
#endif
/**
* @defgroup BMPMAN_CONSTANTS Macro constants used in/with bmpman.h
*
* @{
*/
/**
* @brief How many bitmaps the game can handle
*
* @attention MAX_BITMAPS shouldn't need to be bumped again. With the fixed bm_release() and it's proper use even the
* largest missions should stay under this number. With the largest retail missions and wasteful content we should
* still have about 20% of the slots free. If it still goes over then it's something the artists need to fix.
* For instance the Terran Mara fighter, with -spec and -glow and using the Shinepack, needs 117 bitmap slots alone.
* 111 of those is just for the glowmaps. This number can be greatly reduced if the number of ani frames for another
* LOD than LOD0 has fewer or no ani frames. A 37 frame glow ani for LOD2 is little more than a waste of resources.
* Future reports of texture corruption should be initially approached with content as the cause and not code.
* If anything we could/should reduce MAX_BITMAPS in the future. Where it's at now should accomidate even the
* largest mods. -- Taylor
*/
#define MAX_BITMAPS 4750
// Flag positions for bitmap.flags
// ***** NOTE: bitmap.flags is an 8-bit value, no more BMP_TEX_* flags can be added unless the type is changed!! ******
#define BMP_AABITMAP (1<<0) //!< antialiased bitmap
#define BMP_TEX_XPARENT (1<<1) //!< transparent texture
#define BMP_TEX_OTHER (1<<2) //!< so we can identify all "normal" textures
#define BMP_TEX_DXT1 (1<<3) //!< dxt1 compressed 8r8g8b1a (24bit)
#define BMP_TEX_DXT3 (1<<4) //!< dxt3 compressed 8r8g8b4a (32bit)
#define BMP_TEX_DXT5 (1<<5) //!< dxt5 compressed 8r8g8b8a (32bit)
#define BMP_TEX_CUBEMAP (1<<6) //!< a texture made for cubic environment map
// Combined flags
#define BMP_TEX_COMP ( BMP_TEX_DXT1 | BMP_TEX_DXT3 | BMP_TEX_DXT5 ) //!< Compressed textures
#define BMP_TEX_NONCOMP ( BMP_TEX_XPARENT | BMP_TEX_OTHER ) //!< Non-compressed textures
#define BMP_TEX_ANY ( BMP_TEX_COMP | BMP_TEX_NONCOMP ) //!< Any texture
// Flag positions for bitmap.type
#define BMP_FLAG_RENDER_TARGET_STATIC (1<<0) //!< Texture is a static type
#define BMP_FLAG_RENDER_TARGET_DYNAMIC (1<<1) //!< Texture is a dynamic type (animation)
#define BMP_FLAG_CUBEMAP (1<<2) //!< Texture is a cubemap
// Bitmap types
enum BM_TYPE
{
BM_TYPE_NONE = 0, //!< No type
BM_TYPE_USER, //!< in-memory
BM_TYPE_PCX, //!< PCX
BM_TYPE_TGA, //!< 16 or 32 bit targa
BM_TYPE_DDS, //!< generic identifier for DDS
BM_TYPE_PNG, //!< PNG
BM_TYPE_JPG, //!< 32 bit jpeg
BM_TYPE_ANI, //!< in-house ANI format
BM_TYPE_EFF, //!< specifies any type of animated image, the EFF itself is just text
// special types
BM_TYPE_RENDER_TARGET_STATIC, //!< 24/32 bit setup internally as a static render target
BM_TYPE_RENDER_TARGET_DYNAMIC, //!< 24/32 bit setup internally as a dynamic render target
// Compressed types (bitmap.c_type)
BM_TYPE_DXT1, //!< 24 bit with switchable alpha
BM_TYPE_DXT3, //!< 32 bit with 4 bit alpha
BM_TYPE_DXT5, //!< 32 bit with 8 bit alpha
BM_TYPE_CUBEMAP_DDS, //!< generic DDS cubemap (uncompressed cubemap surface)
BM_TYPE_CUBEMAP_DXT1, //!< 24-bit cubemap (compressed cubemap surface)
BM_TYPE_CUBEMAP_DXT3, //!< 32-bit cubemap (compressed cubemap surface)
BM_TYPE_CUBEMAP_DXT5 //!< 32-bit cubemap (compressed cubemap surface)
};
/**
* @}
*/
struct bitmap
{
short w; //!< Width, in number of pixels
short h; //!< Height, in number of pixels
short rowsize; //!< What you need to add to go to next row
ubyte bpp; //!< Requested bitdepth of each pixel. ( 7, 8, 15, 16, 24, 32)
ubyte true_bpp; //!< The image's actual bitdepth
ubyte flags; //!< Various texture type flags. @see BMPMAN_CONSTANTS
ptr_u data; //!< Pointer to data, or maybe offset into VRAM.
ubyte *palette; /**< @brief Pointer to this bitmap's palette (if it has one).
* @details If BMP_NO_PALETTE_MAP flag is cleared, this palette just points to the screen palette. (gr_palette)
*/
};
extern int bm_texture_ram; //!< how many bytes of textures are used.
extern int Bm_paging; //!< Bool type that indicates if BMPMAN is currently paging.
extern const BM_TYPE bm_type_list[]; //!< List of valid bitmap types
extern const char *bm_ext_list[]; //!< List of extensions for those types
extern const int BM_NUM_TYPES; //!< Calculated number of bitmap types
extern const BM_TYPE bm_ani_type_list[]; //!< List of valid bitmap animation types
extern const char *bm_ani_ext_list[]; //!< List of extensions for those types
extern const int BM_ANI_NUM_TYPES; //!< Calculated number of bitmap animation types
extern int GLOWMAP; //!< References a map that is a fully lit version of its index -Bobboau
extern int SPECMAP; //!< References a map that is for specular mapping -Bobboau
extern int ENVMAP; //!< References a map that is for environment mapping -Bobboau
extern int NORMMAP; //!< Normal mapping
extern int HEIGHTMAP; //!< Height map for normal mapping
extern int MISCMAP; //!< Utility map, to be utilized for various things shader authors can come up with
/**
* @brief Initilizes the bitmap manager
*/
void bm_init();
/**
* @brief Closes the bitmap manager, freeing any allocated memory used by bitmaps. Is called at program close.
*/
void bm_close();
/**
* Gets the cache slot of the bitmap indexed by handle.
*
* @details if the bitmap is an ani, gets the first frame
*
* @returns The cache slot index of the bitmap if handle is valid
*
* @note If the handle is invalid, an Assert() fails
*/
int bm_get_cache_slot(int bitmap_id, int separate_ani_frames);
/**
* @brief Gets the next available bitmap slot.
*/
int bm_get_next_handle();
/**
* @brief Allocates memory for the given handle.
*
* @returns A pointer to the allocated vm if successful,
* @returns Null, if unsuccessful
*
* @note z64 - This function looks fishy. Not only is handle not used in release builds, but bm_bitmaps[handle].size
* and bm_texture_size aren't modified unless this is a debug build
*/
void *bm_malloc(int handle, int size);
/**
* @brief (DEBUG) Similar to bm_malloc, but only updates how much memory is used
*
* @note z64 - Also fishy (see bm_malloc)
*/
void bm_update_memory_used(int n, int size);
class bitmap_lookup {
ubyte *Bitmap_data;
int Width;
int Height;
int Num_channels;
float map_texture_address(float address);
public:
bitmap_lookup(int bitmap_num);
~bitmap_lookup();
bool valid();
float get_channel_red(float u, float v);
float get_channel_green(float u, float v);
float get_channel_blue(float u, float v);
float get_channel_alpha(float u, float v);
};
/**
* @brief Loads a bitmap so we can draw with it later.
*
* @param filename
*
* @returns The bitmap number if successful, else
* @returns a negative value if not
*/
int bm_load(const char* filename);
/**
* @brief Loads a bitmap so we can draw with it later. (Preferred version)
*
* @param filename
*
* @returns The bitmap number if successful, else
* @returns a negative value if not
*/
int bm_load(const SCP_string& filename);
/**
* @brief Reloads a bitmap as a duplicate.
*
* @details This function basically allows you to load a bitmap which already exists (by filename). This is useful
* because in some cases we need to have a bitmap which is locked in screen format _and_ texture format, such as
* the pilot pics and squad logos
*
* @param filename
*
* @returns The bitmap number if successful, else
* @returns a negative value if not
*/
int bm_load_duplicate(const char *filename);
/**
* Loads a bitmap which exists somewhere in the RAM.
*
* @param bpp The bitdepth of the bitmap
* @param w The width of the bitmap
* @param h The height of the bitmap
* @param[in] data The bitmap's data glob
* @param flags
*
* @note The used RAM cannot be freed until bm_release is called on the created bitmap
*/
int bm_create(int bpp, int w, int h, void *data = NULL, int flags = 0);
/**
* @brief Unloads a bitmap's data, but not the bitmap info
*
* @details The bm number (n) may be reused once this function has been called on it. However, it will have to be paged
* in the next time it is locked.
* @param handle The index number of the bitmap to free
* @param clear_render_targets If true, release a render target
* @param nodebug If true, exclude certain debug messages
*
* @returns 0 if not successful,
* @returns 1 if successful
*/
int bm_unload(int handle, int clear_render_targets = 0, bool nodebug = false);
/**
* @brief Quickly unloads a bitmap's data, ignoring the load_count
*
* @details Similar to bm_unload(), except that it can be safely used to free data without worrying about load_count.
* It's safe to use in relation to bm_release() and in gr_*_texture functions
*
* @param handle The bm number of the bitmap to free
* @param clear_render_targets If true, release a render target
*
* @note bm_free_data_fast() is used here and NOT bm_free_data()
*/
int bm_unload_fast(int handle, int clear_render_targets = 0);
/**
* @brief Frees both a bitmap's data and it's associated slot.
*
* @details Once called, the bm number 'n' cannot be used until bm_load or bm_create is re-inits the slot.
*
* @param handle The index number of the bitmap to release
* @param clear_render_targets If nonzero, also release render targets
*
* @returns 1 on success,
* @returns 0 otherwise
*
* @note If the passed handle is that of an ANI, it frees EVERY frame. Be sure to only pass the handle of the first frame!
*
* @todo upgrade return type and clear_render_targets type to bools
*/
int bm_release(int handle, int clear_render_targets = 0);
/**
* @brief Loads a bitmap sequance so we can draw with it.
*
* @param[in] filename
* @param[out] nframes If non-null, set to the number of frames the animation has
* @param[out] fps If non-null, set to the fps of this animation
* @param[out] keyframe if non null, set to the keyframe index of this animation
* @param[in] can_drop_frames If set, allows dropped frames
* @param[in] dir_type Directory type
*
* @returns The bm number of the first bitmap in the sequence if successful, or
* @returns A negative value if unsuccessful
*/
int bm_load_animation(const char *filename, int *nframes = NULL, int *fps = NULL, int *keyframe = NULL, int can_drop_frames = 0, int dir_type = CF_TYPE_ANY);
/**
* @brief Loads either animation (bm_load_animation) or still image (bm_load)
*
* @param[in] filename
* @param[out] nframes If non-null and loading was successful, set to the number of frames the animation has
* @param[out] fps If non-null and loading was successful, set to the fps of this animation
* @param[out] keyframe if non null and loading was successful, set to the keyframe index of this animation
* @param[in] can_drop_frames
* @param[in] dir_type
*
* @returns The bm number of the first bitmap in the sequence if successful, or
* @returns A negative value if unsuccessful
*/
int bm_load_either(const char *filename, int *nframes = NULL, int *fps = NULL, int *keyframe = NULL, int can_drop_frames = 0, int dir_type = CF_TYPE_ANY);
/**
* @brief Locks down the bitmap indexed by bitmapnum.
*
* @details Also converts the bitmap to the appropriate format specified by bpp and flags. Only lock a bitmap when you
* need it!
*
* @param handle The number indexing the desired bitmap
* @param bpp The desired bpp of the bitmep
* @param flags The desired bitmap format
* @param nodebug
* @returns A pointer to the bitmap that's valid until bm_unlock is called if successful, or
* @returns NULL if unsuccessful
*/
bitmap* bm_lock(int handle, ubyte bpp, ubyte flags, bool nodebug = false);
/**
* @brief Returns a unique signiature for the bitmap indexed by handle
*
* @details A signature will change when the bitmap's data changes
*/
uint bm_get_signature(int handle);
/**
* @brief Returns the image type of the given bitmap handle
*/
BM_TYPE bm_get_type(int handle);
/**
* @brief Unlocks a bitmap
*
* @details Decrements the ref_count member of the bitmap_entry struct, A bitmap can only be unloaded when the
* ref_count is 0
*/
void bm_unlock(int handle);
/**
* @brief Checks if the bitmap indexed by handle is valid
*
* @details Some early known false or out of range handles (such as negative) are checked within
* an initial routine pass, followed by a more thorough check routine to ensure the
* series of bitmaps within the bm_bitmaps[] structure have not become invalid.
*
* @returns Nonzero if valid, else
* @returns Zero otherwise
*
* @todo z64 - Returned value is essentially a bool type, need to check all caller functions to see if it can safely
* be updated to reflect this
*/
int bm_is_valid(int handle);
/**
* @brief Gets info on the bitmap indexed by handle.
*
* @param[out] w If non-null, gets the width
* @param[out] h If non-null, gets the heigth
* @param[out] flags If non-null, gets the flags
* @param[out] nframs If non-null, gets the nframes
* @param[out] fps If non-null, gets the fps
*
* @returns The handle on success, or
* @returns The handle to the first frame on success, or
* @returns -1 on failure
*/
int bm_get_info(int handle, int *w = NULL, int * h = NULL, ubyte * flags = NULL, int *nframes = NULL, int *fps = NULL);
/**
* @brief Gets the filename of the bitmap indexed by handle
*
* @param[out] filename The filename of the bitmap, if successful. Is set to an empty string if unseccessful
*
* @todo z64 - maybe deprecate this in favor of an SCP_string version
*/
void bm_get_filename(int bitmapnum, char *filename);
/**
* @brief Gets the filename of the bitmap indexed by handle, which must exist.
*
* @details If the bitmap does not exist (i.e. the handle is invalid), then an Assertion halts program execution.
*
* @returns A const char* to the filename of the bitmap
*
* @todo z64 - maybe deprecate this in favor of an SCP_string version.
* @todo z64 - maybe combine this with the other bm_get_filename function like so:
* void bm_get_filename(int handle, SCP_string *filename, bool must_exist = false);
*/
const char *bm_get_filename(int handle);
/**
* @brief Loads all data for all bitmaps that have been requested to be loaded
*
* @note This function is not defined.
*/
void bm_gfx_load_all();
/**
* @brief Unloads all used bitmaps, should only ever be called by game_shutdown()
*
* @todo Maybe move this declaration into bmpman.cpp and then extern this function within game_shutdown() to
* ensure it only ever gets called there.
*/
void bm_unload_all();
/**
* @brief Gets the palette for a given bitmap indexed by handle, and optionally the filename
*
* @param[out] pal Is set to reference the bitmap's palette
* @param[out] name (optional) Is set to the bitmap's filename
*
* @todo Maybe get rid of the optional filename and have the callers call bm_get_filename. Less efficient, however.
*/
void bm_get_palette(int handle, ubyte *pal, char *name);
/**
* @brief Hack to get a pixel from a bitmap
*
* @details only works good in 8bpp mode
*
* @note This function is not defined.
*/
void bm_gfx_get_pixel(int bitmap, float u, float v, ubyte *r, ubyte *g, ubyte *b);
/**
* @brief (DEBUG) Gets memory size, in bytes, of the locked bitmaps
*
* @details Both params are non-optional, and must be non-null. There's currently no safety checks on either.
*
* @param ntotal[out] Memory size, in bytes, of the locked bitmaps
* @param nnew[out] Memory size, in bytes, of the bitmaps that were locked since the last frame
*
* @note This is a debug function, and is undefined within release builds
*/
void bm_get_frame_usage(int *ntotal, int *nnew);
/**
* @brief Reloads an existing bmpman slot with different bitmap
*
* @param[in] filename The filename of the image to load
*
* @returns The bitmap handle on success, or
* @returns A negative value on failure
*
* @note This should only be used if you are certain the new picture is the same type, has same dimensions, etc.
*/
int bm_reload(int bitmap_handle, const char* filename);
/**
* @brief Tells bmpman to start keeping track of what bitmaps are used where
*/
void bm_page_in_start();
/**
* @brief Tells bmpman to stop paging (?)
*/
void bm_page_in_stop();
// Paging code in a library should call these functions
// in its page in function.
/**
* @brief Marks a texture as being used for this level
*
* @param[in] num_frames If specified, assumes this is an animated texture
*/
void bm_page_in_texture(int bitmapnum, int num_frames = 0);
/**
* @brief Marks a textures as being used for level and is transparant
*
* @param[in] num_frames If specified, assumes this is an animated texture
*/
void bm_page_in_xparent_texture(int bitmapnum, int num_frames = 1);
/**
* @brief Marks a texture as being used for this level, and is anti-aliased
*
* @param[in] num_frames If specified, assumes this is an animated texture
*/
void bm_page_in_aabitmap(int bitmapnum, int num_frames = 1);
/**
* @brief Unloads the bitmap indexed by handle that was previously paged-in
*
* @returns 0 If the bitmap had already been released, or
* @returns 0 If the handle is invalid, or
* @returns 1 If successful
*/
bool bm_page_out(int handle);
/**
* @brief Sets BMPMAN's memory mode
*
* @details 0 = High memory;
* 1 = Low memory (loads every other frame of ani's);
* 2 = Debug low memory (only use first frame of each ani)
*
* @todo This should use an enum, or instead allow an arbitrary number to drop frames (like 1/2, 1/3, etc.)
*/
void bm_set_low_mem(int mode);
/**
* @brief Sets bm_set_components and bm_get_components to reference screen format functions
*/
void BM_SELECT_SCREEN_FORMAT();
/**
* @brief Sets bm_set_components and bm_get_components to reference texture format functions
*/
void BM_SELECT_TEX_FORMAT();
/**
* @brief Sets bm_set_components and bm_get_components to reference texture format functions (with alpha)
*/
void BM_SELECT_ALPHA_TEX_FORMAT();
/**
* @brief Functional pointer that references any of the bm_set_components functions.
*
* @details The bm_set_components functions packs the RGBA values into the ubyte array referenced by pixel, whose
* format differs according to its bpp value and presence of an alpha channel. The RGBA values are scaled accordingly.
*
* @param[out] pixel The pixel to set
* @param[in] r Red value (may not be NULL)
* @param[in] g Green value (may not be NULL)
* @param[in] b Blue value (may not be NULL)
* @param[in] a Alpha value (currently ignored)
*
* @note z64 - These functions were made predating the introduction of C++ classes, and are basically the equivalent
* of Pixel::set(ubyte *r, ubyte *b, ubyte *g). The original comment mentions that any of the rgba params may be
* NULL, but this is by far _NOT_ the case, as a NULL value will cause undefined behavior (really really bad chroma
* corruption)
*
* @note These functions assume the incoming bitdepth will always be >= to the outgoing bitdepth of the pixel. Should
* the incoming bitdepth be lower, the outgoing values will appear darker than they should be
*/
extern void(*bm_set_components)(ubyte *pixel, ubyte *r, ubyte *g, ubyte *b, ubyte *a);
/**
* @brief Functional pointer that references any of the bm_set_components_32 functions.
*
* @details The bm_set_components functions packs the RGBA values into the ubyte array referenced by pixel, whose
* format differs according to its bpp value and presence of an alpha channel. The RGBA values are scaled accordingly.
*
* @see bm_set_components
*/
extern void(*bm_set_components_32)(ubyte *pixel, ubyte *r, ubyte *g, ubyte *b, ubyte *a);
/**
* @brief Sets the 16bpp screen pixel to the specified RGBA value
*
* @see bm_set_components
*/
void bm_set_components_argb_16_screen(ubyte *pixel, ubyte *r, ubyte *g, ubyte *b, ubyte *a);
/**
* @brief Sets the 32bpp screen pixel to the specified RGBA value
*
* @see bm_set_components
*/
void bm_set_components_argb_32_screen(ubyte *pixel, ubyte *r, ubyte *g, ubyte *b, ubyte *a);
/**
* @brief Sets the 16bpp texture pixel to the specified RGBA value
*
* @see bm_set_components
*/
void bm_set_components_argb_16_tex(ubyte *pixel, ubyte *r, ubyte *g, ubyte *b, ubyte *a);
/**
* @brief Sets the 32bpp texture pixel to the specified RGBA value
*
* @see bm_set_components
*/
void bm_set_components_argb_32_tex(ubyte *pixel, ubyte *r, ubyte *g, ubyte *b, ubyte *a);
/**
* @brief Gets the RGBA components of a pixel according to the selected mode
*
* @see BM_SELECT_SCREEN_FORMAT() BM_SELECT_TEX_FORMAT() BM_SELECT_ALPHA_TEX_FORMAT()
*/
void bm_get_components(ubyte *pixel, ubyte *r, ubyte *g, ubyte *b, ubyte *a);
/**
* @brief Returns the compression type of the bitmap indexed by handle
*/
int bm_is_compressed(int handle);
/**
* @brief Gets the correct TCACHE_TYPE for compressed graphics (uncompressed are assumed TCACHE_TYPE_NORMAL)
*/
int bm_get_tcache_type(int handle);
/**
* @brief Gets the size, in bytes, taken up by the bitmap indexed by handle
*/
size_t bm_get_size(int handle);
/**
* @brief Gets the number of mipmaps of the indexed texture
*/
int bm_get_num_mipmaps(int handle);
/**
* @brief Checks to see if the indexed bitmap has an alpha channel
*
* @note Currently just checks if the bitmap is 32bpp and is not a .PCX
*/
bool bm_has_alpha_channel(int handle);
/**
* @brief (DEBUG) Prints all loaded bitmaps to an outwindow
*/
void bm_print_bitmaps();
/**
* @brief Creates a render target as close to the desired resolution as possible.
*
* @returns the handle of an avilable render target if successful, or
* @returns -1 if not successful
*
* @note BM_FLAG_RENDER_TARGET_STATIC are drawn once/infrequently, while BM_FLAG_RENDER_TARGET_DYNAMIC are drawn roughly once every frame
*/
int bm_make_render_target(int width, int height, int flags);
/**
* @brief Checks to see if the given bitmap indexed by handle is a render target
*
* @returns The render type (BM_TYPE) if it is a render target, or
* @returns 0 if it is not
*/
int bm_is_render_target(int handle);
/**
* @brief (GR function) Calls gr_bm_set_render target for the given bitmap indexed by handle
*
* @returns true if successful, or
* @returns false if unsuccessful
*/
bool bm_set_render_target(int handle, int face = -1);
/**
* @brief Loads and parses an .EFF
*
* @param[in] filename The filename of the .EFF
* @param[in] dir_type
* @param[out] nframes (optional) If given, is set to the number of frames this .EFF has
* @param[out] nfps (optional) If given, is set to the fps of this .EFF
* @param[out] key (optional) If given, is set to the keyframe index of this .EFF
* @param[out] type (optional) If given, is set to the BM_TYPE of the .EFF
*
* @returns true If successful
* @returns false If not successful
*/
bool bm_load_and_parse_eff(const char *filename, int dir_type, int *nframes, int *nfps, int *key, BM_TYPE *type);
#endif
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