pandory500/SDL-mirror
2
0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Split out the SDL_rect and SDL_surface functions into their own headers.

Browse source 
Removed unused count from the dirty rect list.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%402639
This commit is contained in:
Sam Lantinga 2007-09-10 12:20:02 +00:00
parent fa9233eaca
commit 68d2b55278
8 changed files with 705 additions and 556 deletions
Download patch file Download diff file Expand all files Collapse all files

52
include/SDL_pixels.h
View file

@ -37,6 +37,10 @@ extern "C" {
/* *INDENT-ON* */
#endif
/* Transparency definitions: These define alpha as the opacity of a surface */
#define SDL_ALPHA_OPAQUE 255
#define SDL_ALPHA_TRANSPARENT 0
enum
{ /* Pixel type */
SDL_PIXELTYPE_UNKNOWN,
@ -330,6 +334,54 @@ extern DECLSPEC int SDLCALL SDL_SetPaletteColors(SDL_Palette * palette,
*/
extern DECLSPEC void SDLCALL SDL_FreePalette(SDL_Palette * palette);
/**
* \fn Uint32 SDL_MapRGB(const SDL_PixelFormat *format,
* Uint8 r, Uint8 g, Uint8 b)
*
* \brief Maps an RGB triple to an opaque pixel value for a given pixel format
*
* \sa SDL_MapRGBA
*/
extern DECLSPEC Uint32 SDLCALL SDL_MapRGB(const SDL_PixelFormat * format,
Uint8 r, Uint8 g, Uint8 b);
/**
* \fn Uint32 SDL_MapRGBA(const SDL_PixelFormat *fmt,
* Uint8 r, Uint8 g, Uint8 b, Uint8 a)
*
* \brief Maps an RGBA quadruple to a pixel value for a given pixel format
*
* \sa SDL_MapRGB
*/
extern DECLSPEC Uint32 SDLCALL SDL_MapRGBA(const SDL_PixelFormat * format,
Uint8 r, Uint8 g, Uint8 b,
Uint8 a);
/**
* \fn void SDL_GetRGB(Uint32 pixel, const SDL_PixelFormat * format,
* Uint8 * r, Uint8 * g, Uint8 * b)
*
* \brief Maps a pixel value into the RGB components for a given pixel format
*
* \sa SDL_GetRGBA
*/
extern DECLSPEC void SDLCALL SDL_GetRGB(Uint32 pixel,
const SDL_PixelFormat * format,
Uint8 * r, Uint8 * g, Uint8 * b);
/**
* \fn void SDL_GetRGBA(Uint32 pixel, const SDL_PixelFormat * format,
* Uint8 * r, Uint8 * g, Uint8 * b, Uint8 * a)
*
* \brief Maps a pixel value into the RGBA components for a given pixel format
*
* \sa SDL_GetRGB
*/
extern DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel,
const SDL_PixelFormat * format,
Uint8 * r, Uint8 * g, Uint8 * b,
Uint8 * a);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */

117
include/SDL_rect.h Normal file
View file

@ -0,0 +1,117 @@
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
/**
* \file SDL_rect.h
*
* Header file for SDL_rect definition and management functions
*/
#ifndef _SDL_rect_h
#define _SDL_rect_h
#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "SDL_pixels.h"
#include "SDL_rwops.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
extern "C" {
/* *INDENT-ON* */
#endif
/**
* \struct SDL_Rect
*
* \brief A rectangle, with the origin at the upper left.
*
* \sa SDL_RectEmpty
* \sa SDL_RectEquals
* \sa SDL_HasIntersection
* \sa SDL_IntersectRect
* \sa SDL_UnionRect
*/
typedef struct SDL_Rect
{
int x, y;
int w, h;
} SDL_Rect;
/**
* \def SDL_RectEmpty()
*
* \brief Returns true if the rectangle has no area.
*/
#define SDL_RectEmpty(X) (((X)->w <= 0) || ((X)->h <= 0))
/**
* \def SDL_RectEquals()
*
* \brief Returns true if the two rectangles are equal.
*/
#define SDL_RectEquals(A, B) (((A)->x == (B)->x) && ((A)->y == (B)->y) && \
((A)->w == (B)->w) && ((A)->h == (B)->h))
/**
* \fn SDL_bool SDL_HasIntersection(const SDL_Rect * A, const SDL_Rect * B);
*
* \brief Determine whether two rectangles intersect.
*
* \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_HasIntersection(const SDL_Rect * A,
const SDL_Rect * B);
/**
* \fn SDL_bool SDL_IntersectRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result)
*
* \brief Calculate the intersection of two rectangles.
*
* \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRect(const SDL_Rect * A,
const SDL_Rect * B,
SDL_Rect * result);
/**
* \fn void SDL_UnionRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result)
*
* \brief Calculate the union of two rectangles
*/
extern DECLSPEC void SDLCALL SDL_UnionRect(const SDL_Rect * A,
const SDL_Rect * B,
SDL_Rect * result);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
}
/* *INDENT-ON* */
#endif
#include "close_code.h"
#endif /* _SDL_rect_h */
/* vi: set ts=4 sw=4 expandtab: */

488
include/SDL_surface.h Normal file
View file

@ -0,0 +1,488 @@
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2006 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
/**
* \file SDL_surface.h
*
* Header file for SDL_surface definition and management functions
*/
#ifndef _SDL_surface_h
#define _SDL_surface_h
#include "SDL_stdinc.h"
#include "SDL_pixels.h"
#include "SDL_rect.h"
#include "SDL_rwops.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
extern "C" {
/* *INDENT-ON* */
#endif
/* These are the currently supported flags for the SDL_surface */
/* Used internally (read-only) */
#define SDL_PREALLOC 0x00000001 /* Surface uses preallocated memory */
#define SDL_RLEACCEL 0x00000002 /* Surface is RLE encoded */
/* Evaluates to true if the surface needs to be locked before access */
#define SDL_MUSTLOCK(S) (((S)->flags & SDL_RLEACCEL) != 0)
/**
* \struct SDL_Surface
*
* \brief A collection of pixels used in software blitting
*
* \note This structure should be treated as read-only, except for 'pixels',
* which, if not NULL, contains the raw pixel data for the surface.
*/
typedef struct SDL_Surface
{
Uint32 flags; /**< Read-only */
SDL_PixelFormat *format; /**< Read-only */
int w, h; /**< Read-only */
int pitch; /**< Read-only */
void *pixels; /**< Read-write */
/* Application data associated with the surfade */
void *userdata; /**< Read-write */
/* information needed for surfaces requiring locks */
int locked; /**< Read-only */
void *lock_data; /**< Read-only */
/* clipping information */
SDL_Rect clip_rect; /**< Read-only */
/* info for fast blit mapping to other surfaces */
struct SDL_BlitMap *map; /**< Private */
/* format version, bumped at every change to invalidate blit maps */
unsigned int format_version; /**< Private */
/* Reference count -- used when freeing surface */
int refcount; /**< Read-mostly */
} SDL_Surface;
/**
* \typedef SDL_blit
*
* \brief The type of function used for surface blitting functions
*/
typedef int (*SDL_blit) (struct SDL_Surface * src, SDL_Rect * srcrect,
struct SDL_Surface * dst, SDL_Rect * dstrect);
/*
* Allocate and free an RGB surface (must be called after SDL_SetVideoMode)
* If the depth is 4 or 8 bits, an empty palette is allocated for the surface.
* If the depth is greater than 8 bits, the pixel format is set using the
* flags '[RGB]mask'.
* If the function runs out of memory, it will return NULL.
*
* The 'flags' tell what kind of surface to create.
* SDL_SRCCOLORKEY indicates that the surface will be used for colorkey blits.
* SDL_SRCALPHA means that the surface will be used for alpha blits.
*/
extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurface
(Uint32 flags, int width, int height, int depth,
Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceFrom(void *pixels,
int width,
int height,
int depth,
int pitch,
Uint32 Rmask,
Uint32 Gmask,
Uint32 Bmask,
Uint32 Amask);
extern DECLSPEC void SDLCALL SDL_FreeSurface(SDL_Surface * surface);
/**
* \fn int SDL_SetSurfacePalette(SDL_Surface *surface, SDL_Palette *palette)
*
* \brief Set the palette used by a surface.
*
* \return 0, or -1 if the surface format doesn't use a palette.
*
* \note A single palette can be shared with many surfaces.
*/
extern DECLSPEC int SDLCALL SDL_SetSurfacePalette(SDL_Surface * surface,
SDL_Palette * palette);
/*
* SDL_LockSurface() sets up a surface for directly accessing the pixels.
* Between calls to SDL_LockSurface()/SDL_UnlockSurface(), you can write
* to and read from 'surface->pixels', using the pixel format stored in
* 'surface->format'. Once you are done accessing the surface, you should
* use SDL_UnlockSurface() to release it.
*
* Not all surfaces require locking. If SDL_MUSTLOCK(surface) evaluates
* to 0, then you can read and write to the surface at any time, and the
* pixel format of the surface will not change.
*
* No operating system or library calls should be made between lock/unlock
* pairs, as critical system locks may be held during this time.
*
* SDL_LockSurface() returns 0, or -1 if the surface couldn't be locked.
*/
extern DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface * surface);
extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface * surface);
/*
* Load a surface from a seekable SDL data source (memory or file.)
* If 'freesrc' is non-zero, the source will be closed after being read.
* Returns the new surface, or NULL if there was an error.
* The new surface should be freed with SDL_FreeSurface().
*/
extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP_RW(SDL_RWops * src,
int freesrc);
/* Convenience macro -- load a surface from a file */
#define SDL_LoadBMP(file) SDL_LoadBMP_RW(SDL_RWFromFile(file, "rb"), 1)
/*
* Save a surface to a seekable SDL data source (memory or file.)
* If 'freedst' is non-zero, the source will be closed after being written.
* Returns 0 if successful or -1 if there was an error.
*/
extern DECLSPEC int SDLCALL SDL_SaveBMP_RW
(SDL_Surface * surface, SDL_RWops * dst, int freedst);
/* Convenience macro -- save a surface to a file */
#define SDL_SaveBMP(surface, file) \
SDL_SaveBMP_RW(surface, SDL_RWFromFile(file, "wb"), 1)
/*
* \fn int SDL_SetSurfaceRLE(SDL_Surface *surface, int flag)
*
* \brief Sets the RLE acceleration hint for a surface.
*
* \return 0 on success, or -1 if the surface is not valid
*
* \note If RLE is enabled, colorkey and alpha blending blits are much faster,
* but the surface must be locked before directly accessing the pixels.
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface,
int flag);
/*
* \fn int SDL_SetColorKey(SDL_Surface *surface, Uint32 flag, Uint32 key)
*
* \brief Sets the color key (transparent pixel) in a blittable surface.
*
* \param surface The surface to update
* \param flag Non-zero to enable colorkey and 0 to disable colorkey
* \param key The transparent pixel in the native surface format
*
* \return 0 on success, or -1 if the surface is not valid
*/
extern DECLSPEC int SDLCALL SDL_SetColorKey(SDL_Surface * surface,
Uint32 flag, Uint32 key);
/**
* \fn int SDL_SetSurfaceColorMod(SDL_Surface *surface, Uint8 r, Uint8 g, Uint8 b)
*
* \brief Set an additional color value used in blit operations
*
* \param surface The surface to update
* \param r The red source color value multiplied into blit operations
* \param g The green source color value multiplied into blit operations
* \param b The blue source color value multiplied into blit operations
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_GetSurfaceColorMod()
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceColorMod(SDL_Surface * surface,
Uint8 r, Uint8 g, Uint8 b);
/**
* \fn int SDL_GetSurfaceColorMod(SDL_Surface *surface, Uint8 *r, Uint8 *g, Uint8 *b)
*
* \brief Get the additional color value used in blit operations
*
* \param surface The surface to query
* \param r A pointer filled in with the source red color value
* \param g A pointer filled in with the source green color value
* \param b A pointer filled in with the source blue color value
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_SetSurfaceColorMod()
*/
extern DECLSPEC int SDLCALL SDL_GetSurfaceColorMod(SDL_Surface * surface,
Uint8 * r, Uint8 * g,
Uint8 * b);
/**
* \fn int SDL_SetSurfaceAlphaMod(SDL_Surface *surface, Uint8 alpha)
*
* \brief Set an additional alpha value used in blit operations
*
* \param surface The surface to update
* \param alpha The source alpha value multiplied into blit operations.
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_GetSurfaceAlphaMod()
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceAlphaMod(SDL_Surface * surface,
Uint8 alpha);
/**
* \fn int SDL_GetSurfaceAlphaMod(SDL_Surface *surface, Uint8 *alpha)
*
* \brief Get the additional alpha value used in blit operations
*
* \param surface The surface to query
* \param alpha A pointer filled in with the source alpha value
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_SetSurfaceAlphaMod()
*/
extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface * surface,
Uint8 * alpha);
/**
* \fn int SDL_SetSurfaceBlendMode(SDL_Surface *surface, int blendMode)
*
* \brief Set the blend mode used for blit operations
*
* \param surface The surface to update
* \param blendMode SDL_TextureBlendMode to use for blit blending
*
* \return 0 on success, or -1 if the parameters are not valid
*
* \sa SDL_GetSurfaceBlendMode()
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceBlendMode(SDL_Surface * surface,
int blendMode);
/**
* \fn int SDL_GetSurfaceBlendMode(SDL_Surface *surface, int *blendMode)
*
* \brief Get the blend mode used for blit operations
*
* \param surface The surface to query
* \param blendMode A pointer filled in with the current blend mode
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_SetSurfaceBlendMode()
*/
extern DECLSPEC int SDLCALL SDL_GetSurfaceBlendMode(SDL_Surface * surface,
int *blendMode);
/**
* \fn int SDL_SetSurfaceScaleMode(SDL_Surface *surface, int scaleMode)
*
* \brief Set the scale mode used for blit operations
*
* \param surface The surface to update
* \param scaleMode SDL_TextureScaleMode to use for blit scaling
*
* \return 0 on success, or -1 if the surface is not valid or the scale mode is not supported
*
* \note If the scale mode is not supported, the closest supported mode is chosen. Currently only SDL_TEXTURESCALEMODE_FAST is supported on surfaces.
*
* \sa SDL_GetSurfaceScaleMode()
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceScaleMode(SDL_Surface * surface,
int scaleMode);
/**
* \fn int SDL_GetSurfaceScaleMode(SDL_Surface *surface, int *scaleMode)
*
* \brief Get the scale mode used for blit operations
*
* \param surface The surface to query
* \param scaleMode A pointer filled in with the current scale mode
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_SetSurfaceScaleMode()
*/
extern DECLSPEC int SDLCALL SDL_GetSurfaceScaleMode(SDL_Surface * surface,
int *scaleMode);
/*
* Sets the clipping rectangle for the destination surface in a blit.
*
* If the clip rectangle is NULL, clipping will be disabled.
* If the clip rectangle doesn't intersect the surface, the function will
* return SDL_FALSE and blits will be completely clipped. Otherwise the
* function returns SDL_TRUE and blits to the surface will be clipped to
* the intersection of the surface area and the clipping rectangle.
*
* Note that blits are automatically clipped to the edges of the source
* and destination surfaces.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_SetClipRect(SDL_Surface * surface,
const SDL_Rect * rect);
/*
* Gets the clipping rectangle for the destination surface in a blit.
* 'rect' must be a pointer to a valid rectangle which will be filled
* with the correct values.
*/
extern DECLSPEC void SDLCALL SDL_GetClipRect(SDL_Surface * surface,
SDL_Rect * rect);
/*
* Creates a new surface of the specified format, and then copies and maps
* the given surface to it so the blit of the converted surface will be as
* fast as possible. If this function fails, it returns NULL.
*
* The 'flags' parameter is passed to SDL_CreateRGBSurface() and has those
* semantics. You can also pass SDL_RLEACCEL in the flags parameter and
* SDL will try to RLE accelerate colorkey and alpha blits in the resulting
* surface.
*
* This function is used internally by SDL_DisplayFormat().
*/
extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface
(SDL_Surface * src, SDL_PixelFormat * fmt, Uint32 flags);
/*
* This function performs a fast fill of the given rectangle with 'color'
* The given rectangle is clipped to the destination surface clip area
* and the final fill rectangle is saved in the passed in pointer.
* If 'dstrect' is NULL, the whole surface will be filled with 'color'
* The color should be a pixel of the format used by the surface, and
* can be generated by the SDL_MapRGB() function.
* This function returns 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_FillRect
(SDL_Surface * dst, SDL_Rect * dstrect, Uint32 color);
/*
* This performs a fast blit from the source surface to the destination
* surface. It assumes that the source and destination rectangles are
* the same size. If either 'srcrect' or 'dstrect' are NULL, the entire
* surface (src or dst) is copied. The final blit rectangles are saved
* in 'srcrect' and 'dstrect' after all clipping is performed.
* If the blit is successful, it returns 0, otherwise it returns -1.
*
* The blit function should not be called on a locked surface.
*
* The blit semantics for surfaces with and without alpha and colorkey
* are defined as follows:
*
* RGBA->RGB:
* SDL_SRCALPHA set:
* alpha-blend (using alpha-channel).
* SDL_SRCCOLORKEY ignored.
* SDL_SRCALPHA not set:
* copy RGB.
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* RGB values of the source colour key, ignoring alpha in the
* comparison.
*
* RGB->RGBA:
* SDL_SRCALPHA set:
* alpha-blend (using the source per-surface alpha value);
* set destination alpha to opaque.
* SDL_SRCALPHA not set:
* copy RGB, set destination alpha to source per-surface alpha value.
* both:
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* source colour key.
*
* RGBA->RGBA:
* SDL_SRCALPHA set:
* alpha-blend (using the source alpha channel) the RGB values;
* leave destination alpha untouched. [Note: is this correct?]
* SDL_SRCCOLORKEY ignored.
* SDL_SRCALPHA not set:
* copy all of RGBA to the destination.
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* RGB values of the source colour key, ignoring alpha in the
* comparison.
*
* RGB->RGB:
* SDL_SRCALPHA set:
* alpha-blend (using the source per-surface alpha value).
* SDL_SRCALPHA not set:
* copy RGB.
* both:
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* source colour key.
*
* If either of the surfaces were in video memory, and the blit returns -2,
* the video memory was lost, so it should be reloaded with artwork and
* re-blitted:
while ( SDL_BlitSurface(image, imgrect, screen, dstrect) == -2 ) {
while ( SDL_LockSurface(image) < 0 )
Sleep(10);
-- Write image pixels to image->pixels --
SDL_UnlockSurface(image);
}
* This happens under DirectX 5.0 when the system switches away from your
* fullscreen application. The lock will also fail until you have access
* to the video memory again.
*/
/* You should call SDL_BlitSurface() unless you know exactly how SDL
blitting works internally and how to use the other blit functions.
*/
#define SDL_BlitSurface SDL_UpperBlit
/* This is the public blit function, SDL_BlitSurface(), and it performs
rectangle validation and clipping before passing it to SDL_LowerBlit()
*/
extern DECLSPEC int SDLCALL SDL_UpperBlit
(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect);
/* This is a semi-private blit function and it performs low-level surface
blitting only.
*/
extern DECLSPEC int SDLCALL SDL_LowerBlit
(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect);
/**
* \fn int SDL_SoftStretch(SDL_Surface * src, SDL_Rect * srcrect, SDL_Surface * dst, SDL_Rect * dstrect)
*
* \brief Perform a fast, low quality, stretch blit between two surfaces of the same pixel format.
*
* \note This function uses a static buffer, and is not thread-safe.
*/
extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src,
SDL_Rect * srcrect,
SDL_Surface * dst,
SDL_Rect * dstrect);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus
/* *INDENT-OFF* */
}
/* *INDENT-ON* */
#endif
#include "close_code.h"
#endif /* _SDL_surface_h */
/* vi: set ts=4 sw=4 expandtab: */

517
include/SDL_video.h
View file

@ -23,16 +23,16 @@
/**
* \file SDL_video.h
*
* Header file for access to the SDL raw framebuffer window
* Header file for SDL video functions.
*/
#ifndef _SDL_video_h
#define _SDL_video_h
#include "SDL_stdinc.h"
#include "SDL_error.h"
#include "SDL_pixels.h"
#include "SDL_rwops.h"
#include "SDL_rect.h"
#include "SDL_surface.h"
#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
@ -42,21 +42,6 @@ extern "C" {
/* *INDENT-ON* */
#endif
/* Transparency definitions: These define alpha as the opacity of a surface */
#define SDL_ALPHA_OPAQUE 255
#define SDL_ALPHA_TRANSPARENT 0
/**
* \struct SDL_Rect
*
* \brief A rectangle, with the origin at the upper left.
*/
typedef struct SDL_Rect
{
int x, y;
int w, h;
} SDL_Rect;
/**
* \struct SDL_DisplayMode
*
@ -261,51 +246,6 @@ typedef Uint32 SDL_TextureID;
*/
typedef void *SDL_GLContext;
/* These are the currently supported flags for the SDL_surface */
/* Used internally (read-only) */
#define SDL_PREALLOC 0x00000001 /* Surface uses preallocated memory */
#define SDL_RLEACCEL 0x00000002 /* Surface is RLE encoded */
/* Evaluates to true if the surface needs to be locked before access */
#define SDL_MUSTLOCK(S) (((S)->flags & SDL_RLEACCEL) != 0)
/* This structure should be treated as read-only, except for 'pixels',
which, if not NULL, contains the raw pixel data for the surface.
*/
typedef struct SDL_Surface
{
Uint32 flags; /* Read-only */
SDL_PixelFormat *format; /* Read-only */
int w, h; /* Read-only */
int pitch; /* Read-only */
void *pixels; /* Read-write */
/* Application data associated with the surfade */
void *userdata; /* Read-write */
/* information needed for surfaces requiring locks */
int locked; /* Read-only */
void *lock_data; /* Read-only */
/* clipping information */
SDL_Rect clip_rect; /* Read-only */
/* info for fast blit mapping to other surfaces */
struct SDL_BlitMap *map; /* Private */
/* format version, bumped at every change to invalidate blit maps */
unsigned int format_version; /* Private */
/* Reference count -- used when freeing surface */
int refcount; /* Read-mostly */
} SDL_Surface;
/* typedef for private surface blitting functions */
typedef int (*SDL_blit) (struct SDL_Surface * src, SDL_Rect * srcrect,
struct SDL_Surface * dst, SDL_Rect * dstrect);
/**
* \enum SDL_GLattr
*
@ -1290,413 +1230,6 @@ extern DECLSPEC void SDLCALL SDL_DestroyTexture(SDL_TextureID textureID);
*/
extern DECLSPEC void SDLCALL SDL_DestroyRenderer(SDL_WindowID windowID);
/*
* Maps an RGB triple to an opaque pixel value for a given pixel format
*/
extern DECLSPEC Uint32 SDLCALL SDL_MapRGB(const SDL_PixelFormat *
const format, const Uint8 r,
const Uint8 g, const Uint8 b);
/*
* Maps an RGBA quadruple to a pixel value for a given pixel format
*/
extern DECLSPEC Uint32 SDLCALL SDL_MapRGBA(const SDL_PixelFormat * const fmt,
const Uint8 r, const Uint8 g,
const Uint8 b, const Uint8 a);
/*
* Maps a pixel value into the RGB components for a given pixel format
*/
extern DECLSPEC void SDLCALL SDL_GetRGB(Uint32 pixel, SDL_PixelFormat * fmt,
Uint8 * r, Uint8 * g, Uint8 * b);
/*
* Maps a pixel value into the RGBA components for a given pixel format
*/
extern DECLSPEC void SDLCALL SDL_GetRGBA(Uint32 pixel, SDL_PixelFormat * fmt,
Uint8 * r, Uint8 * g, Uint8 * b,
Uint8 * a);
/*
* Allocate and free an RGB surface (must be called after SDL_SetVideoMode)
* If the depth is 4 or 8 bits, an empty palette is allocated for the surface.
* If the depth is greater than 8 bits, the pixel format is set using the
* flags '[RGB]mask'.
* If the function runs out of memory, it will return NULL.
*
* The 'flags' tell what kind of surface to create.
* SDL_SRCCOLORKEY indicates that the surface will be used for colorkey blits.
* SDL_SRCALPHA means that the surface will be used for alpha blits.
*/
extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurface
(Uint32 flags, int width, int height, int depth,
Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask);
extern DECLSPEC SDL_Surface *SDLCALL SDL_CreateRGBSurfaceFrom(void *pixels,
int width,
int height,
int depth,
int pitch,
Uint32 Rmask,
Uint32 Gmask,
Uint32 Bmask,
Uint32 Amask);
extern DECLSPEC void SDLCALL SDL_FreeSurface(SDL_Surface * surface);
/**
* \fn int SDL_SetSurfacePalette(SDL_Surface *surface, SDL_Palette *palette)
*
* \brief Set the palette used by a surface.
*
* \return 0, or -1 if the surface format doesn't use a palette.
*
* \note A single palette can be shared with many surfaces.
*/
extern DECLSPEC int SDLCALL SDL_SetSurfacePalette(SDL_Surface * surface,
SDL_Palette * palette);
/*
* SDL_LockSurface() sets up a surface for directly accessing the pixels.
* Between calls to SDL_LockSurface()/SDL_UnlockSurface(), you can write
* to and read from 'surface->pixels', using the pixel format stored in
* 'surface->format'. Once you are done accessing the surface, you should
* use SDL_UnlockSurface() to release it.
*
* Not all surfaces require locking. If SDL_MUSTLOCK(surface) evaluates
* to 0, then you can read and write to the surface at any time, and the
* pixel format of the surface will not change.
*
* No operating system or library calls should be made between lock/unlock
* pairs, as critical system locks may be held during this time.
*
* SDL_LockSurface() returns 0, or -1 if the surface couldn't be locked.
*/
extern DECLSPEC int SDLCALL SDL_LockSurface(SDL_Surface * surface);
extern DECLSPEC void SDLCALL SDL_UnlockSurface(SDL_Surface * surface);
/*
* Load a surface from a seekable SDL data source (memory or file.)
* If 'freesrc' is non-zero, the source will be closed after being read.
* Returns the new surface, or NULL if there was an error.
* The new surface should be freed with SDL_FreeSurface().
*/
extern DECLSPEC SDL_Surface *SDLCALL SDL_LoadBMP_RW(SDL_RWops * src,
int freesrc);
/* Convenience macro -- load a surface from a file */
#define SDL_LoadBMP(file) SDL_LoadBMP_RW(SDL_RWFromFile(file, "rb"), 1)
/*
* Save a surface to a seekable SDL data source (memory or file.)
* If 'freedst' is non-zero, the source will be closed after being written.
* Returns 0 if successful or -1 if there was an error.
*/
extern DECLSPEC int SDLCALL SDL_SaveBMP_RW
(SDL_Surface * surface, SDL_RWops * dst, int freedst);
/* Convenience macro -- save a surface to a file */
#define SDL_SaveBMP(surface, file) \
SDL_SaveBMP_RW(surface, SDL_RWFromFile(file, "wb"), 1)
/*
* \fn int SDL_SetSurfaceRLE(SDL_Surface *surface, int flag)
*
* \brief Sets the RLE acceleration hint for a surface.
*
* \return 0 on success, or -1 if the surface is not valid
*
* \note If RLE is enabled, colorkey and alpha blending blits are much faster,
* but the surface must be locked before directly accessing the pixels.
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface,
int flag);
/*
* \fn int SDL_SetColorKey(SDL_Surface *surface, Uint32 flag, Uint32 key)
*
* \brief Sets the color key (transparent pixel) in a blittable surface.
*
* \param surface The surface to update
* \param flag Non-zero to enable colorkey and 0 to disable colorkey
* \param key The transparent pixel in the native surface format
*
* \return 0 on success, or -1 if the surface is not valid
*/
extern DECLSPEC int SDLCALL SDL_SetColorKey(SDL_Surface * surface,
Uint32 flag, Uint32 key);
/**
* \fn int SDL_SetSurfaceColorMod(SDL_Surface *surface, Uint8 r, Uint8 g, Uint8 b)
*
* \brief Set an additional color value used in blit operations
*
* \param surface The surface to update
* \param r The red source color value multiplied into blit operations
* \param g The green source color value multiplied into blit operations
* \param b The blue source color value multiplied into blit operations
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_GetSurfaceColorMod()
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceColorMod(SDL_Surface * surface,
Uint8 r, Uint8 g, Uint8 b);
/**
* \fn int SDL_GetSurfaceColorMod(SDL_Surface *surface, Uint8 *r, Uint8 *g, Uint8 *b)
*
* \brief Get the additional color value used in blit operations
*
* \param surface The surface to query
* \param r A pointer filled in with the source red color value
* \param g A pointer filled in with the source green color value
* \param b A pointer filled in with the source blue color value
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_SetSurfaceColorMod()
*/
extern DECLSPEC int SDLCALL SDL_GetSurfaceColorMod(SDL_Surface * surface,
Uint8 * r, Uint8 * g,
Uint8 * b);
/**
* \fn int SDL_SetSurfaceAlphaMod(SDL_Surface *surface, Uint8 alpha)
*
* \brief Set an additional alpha value used in blit operations
*
* \param surface The surface to update
* \param alpha The source alpha value multiplied into blit operations.
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_GetSurfaceAlphaMod()
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceAlphaMod(SDL_Surface * surface,
Uint8 alpha);
/**
* \fn int SDL_GetSurfaceAlphaMod(SDL_Surface *surface, Uint8 *alpha)
*
* \brief Get the additional alpha value used in blit operations
*
* \param surface The surface to query
* \param alpha A pointer filled in with the source alpha value
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_SetSurfaceAlphaMod()
*/
extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface * surface,
Uint8 * alpha);
/**
* \fn int SDL_SetSurfaceBlendMode(SDL_Surface *surface, int blendMode)
*
* \brief Set the blend mode used for blit operations
*
* \param surface The surface to update
* \param blendMode SDL_TextureBlendMode to use for blit blending
*
* \return 0 on success, or -1 if the parameters are not valid
*
* \sa SDL_GetSurfaceBlendMode()
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceBlendMode(SDL_Surface * surface,
int blendMode);
/**
* \fn int SDL_GetSurfaceBlendMode(SDL_Surface *surface, int *blendMode)
*
* \brief Get the blend mode used for blit operations
*
* \param surface The surface to query
* \param blendMode A pointer filled in with the current blend mode
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_SetSurfaceBlendMode()
*/
extern DECLSPEC int SDLCALL SDL_GetSurfaceBlendMode(SDL_Surface * surface,
int *blendMode);
/**
* \fn int SDL_SetSurfaceScaleMode(SDL_Surface *surface, int scaleMode)
*
* \brief Set the scale mode used for blit operations
*
* \param surface The surface to update
* \param scaleMode SDL_TextureScaleMode to use for blit scaling
*
* \return 0 on success, or -1 if the surface is not valid or the scale mode is not supported
*
* \note If the scale mode is not supported, the closest supported mode is chosen. Currently only SDL_TEXTURESCALEMODE_FAST is supported on surfaces.
*
* \sa SDL_GetSurfaceScaleMode()
*/
extern DECLSPEC int SDLCALL SDL_SetSurfaceScaleMode(SDL_Surface * surface,
int scaleMode);
/**
* \fn int SDL_GetSurfaceScaleMode(SDL_Surface *surface, int *scaleMode)
*
* \brief Get the scale mode used for blit operations
*
* \param surface The surface to query
* \param scaleMode A pointer filled in with the current scale mode
*
* \return 0 on success, or -1 if the surface is not valid
*
* \sa SDL_SetSurfaceScaleMode()
*/
extern DECLSPEC int SDLCALL SDL_GetSurfaceScaleMode(SDL_Surface * surface,
int *scaleMode);
/*
* Sets the clipping rectangle for the destination surface in a blit.
*
* If the clip rectangle is NULL, clipping will be disabled.
* If the clip rectangle doesn't intersect the surface, the function will
* return SDL_FALSE and blits will be completely clipped. Otherwise the
* function returns SDL_TRUE and blits to the surface will be clipped to
* the intersection of the surface area and the clipping rectangle.
*
* Note that blits are automatically clipped to the edges of the source
* and destination surfaces.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_SetClipRect(SDL_Surface * surface,
const SDL_Rect * rect);
/*
* Gets the clipping rectangle for the destination surface in a blit.
* 'rect' must be a pointer to a valid rectangle which will be filled
* with the correct values.
*/
extern DECLSPEC void SDLCALL SDL_GetClipRect(SDL_Surface * surface,
SDL_Rect * rect);
/*
* Creates a new surface of the specified format, and then copies and maps
* the given surface to it so the blit of the converted surface will be as
* fast as possible. If this function fails, it returns NULL.
*
* The 'flags' parameter is passed to SDL_CreateRGBSurface() and has those
* semantics. You can also pass SDL_RLEACCEL in the flags parameter and
* SDL will try to RLE accelerate colorkey and alpha blits in the resulting
* surface.
*
* This function is used internally by SDL_DisplayFormat().
*/
extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface
(SDL_Surface * src, SDL_PixelFormat * fmt, Uint32 flags);
/*
* This function performs a fast fill of the given rectangle with 'color'
* The given rectangle is clipped to the destination surface clip area
* and the final fill rectangle is saved in the passed in pointer.
* If 'dstrect' is NULL, the whole surface will be filled with 'color'
* The color should be a pixel of the format used by the surface, and
* can be generated by the SDL_MapRGB() function.
* This function returns 0 on success, or -1 on error.
*/
extern DECLSPEC int SDLCALL SDL_FillRect
(SDL_Surface * dst, SDL_Rect * dstrect, Uint32 color);
/*
* This performs a fast blit from the source surface to the destination
* surface. It assumes that the source and destination rectangles are
* the same size. If either 'srcrect' or 'dstrect' are NULL, the entire
* surface (src or dst) is copied. The final blit rectangles are saved
* in 'srcrect' and 'dstrect' after all clipping is performed.
* If the blit is successful, it returns 0, otherwise it returns -1.
*
* The blit function should not be called on a locked surface.
*
* The blit semantics for surfaces with and without alpha and colorkey
* are defined as follows:
*
* RGBA->RGB:
* SDL_SRCALPHA set:
* alpha-blend (using alpha-channel).
* SDL_SRCCOLORKEY ignored.
* SDL_SRCALPHA not set:
* copy RGB.
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* RGB values of the source colour key, ignoring alpha in the
* comparison.
*
* RGB->RGBA:
* SDL_SRCALPHA set:
* alpha-blend (using the source per-surface alpha value);
* set destination alpha to opaque.
* SDL_SRCALPHA not set:
* copy RGB, set destination alpha to source per-surface alpha value.
* both:
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* source colour key.
*
* RGBA->RGBA:
* SDL_SRCALPHA set:
* alpha-blend (using the source alpha channel) the RGB values;
* leave destination alpha untouched. [Note: is this correct?]
* SDL_SRCCOLORKEY ignored.
* SDL_SRCALPHA not set:
* copy all of RGBA to the destination.
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* RGB values of the source colour key, ignoring alpha in the
* comparison.
*
* RGB->RGB:
* SDL_SRCALPHA set:
* alpha-blend (using the source per-surface alpha value).
* SDL_SRCALPHA not set:
* copy RGB.
* both:
* if SDL_SRCCOLORKEY set, only copy the pixels matching the
* source colour key.
*
* If either of the surfaces were in video memory, and the blit returns -2,
* the video memory was lost, so it should be reloaded with artwork and
* re-blitted:
while ( SDL_BlitSurface(image, imgrect, screen, dstrect) == -2 ) {
while ( SDL_LockSurface(image) < 0 )
Sleep(10);
-- Write image pixels to image->pixels --
SDL_UnlockSurface(image);
}
* This happens under DirectX 5.0 when the system switches away from your
* fullscreen application. The lock will also fail until you have access
* to the video memory again.
*/
/* You should call SDL_BlitSurface() unless you know exactly how SDL
blitting works internally and how to use the other blit functions.
*/
#define SDL_BlitSurface SDL_UpperBlit
/* This is the public blit function, SDL_BlitSurface(), and it performs
rectangle validation and clipping before passing it to SDL_LowerBlit()
*/
extern DECLSPEC int SDLCALL SDL_UpperBlit
(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect);
/* This is a semi-private blit function and it performs low-level surface
blitting only.
*/
extern DECLSPEC int SDLCALL SDL_LowerBlit
(SDL_Surface * src, SDL_Rect * srcrect,
SDL_Surface * dst, SDL_Rect * dstrect);
/**
* \fn int SDL_SoftStretch(SDL_Surface * src, SDL_Rect * srcrect, SDL_Surface * dst, SDL_Rect * dstrect)
*
* \brief Perform a fast, low quality, stretch blit between two surfaces of the same pixel format.
*
* \note This function uses a static buffer, and is not thread-safe.
*/
extern DECLSPEC int SDLCALL SDL_SoftStretch(SDL_Surface * src,
SDL_Rect * srcrect,
SDL_Surface * dst,
SDL_Rect * dstrect);
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* OpenGL support functions. */
@ -1811,50 +1344,6 @@ extern DECLSPEC void SDLCALL SDL_GL_SwapWindow(SDL_WindowID windowID);
*/
extern DECLSPEC void SDLCALL SDL_GL_DeleteContext(SDL_GLContext context);
/**
* \def SDL_RectEmpty()
*
* \brief Returns true if the rectangle has no area.
*/
#define SDL_RectEmpty(X) (((X)->w <= 0) || ((X)->h <= 0))
/**
* \def SDL_RectEquals()
*
* \brief Returns true if the two rectangles are equal.
*/
#define SDL_RectEquals(A, B) (((A)->x == (B)->x) && ((A)->y == (B)->y) && \
((A)->w == (B)->w) && ((A)->h == (B)->h))
/**
* \fn SDL_bool SDL_HasIntersection(const SDL_Rect * A, const SDL_Rect * B);
*
* \brief Determine whether two rectangles intersect.
*
* \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_HasIntersection(const SDL_Rect * A,
const SDL_Rect * B);
/**
* \fn SDL_bool SDL_IntersectRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result)
*
* \brief Calculate the intersection of two rectangles.
*
* \return SDL_TRUE if there is an intersection, SDL_FALSE otherwise.
*/
extern DECLSPEC SDL_bool SDLCALL SDL_IntersectRect(const SDL_Rect * A,
const SDL_Rect * B,
SDL_Rect * result);
/**
* \fn void SDL_UnionRect(const SDL_Rect * A, const SDL_Rect * B, SDL_Rect * result)
*
* \brief Calculate the union of two rectangles
*/
extern DECLSPEC void SDLCALL SDL_UnionRect(const SDL_Rect * A,
const SDL_Rect * B,
SDL_Rect * result);
/* Ends C function definitions when using C++ */
#ifdef __cplusplus

82
src/video/SDL_pixels.c
View file

@ -536,8 +536,7 @@ SDL_FindColor(SDL_Palette * pal, Uint8 r, Uint8 g, Uint8 b)
/* Find the opaque pixel value corresponding to an RGB triple */
Uint32
SDL_MapRGB(const SDL_PixelFormat * const format, const Uint8 r, const Uint8 g,
const Uint8 b)
SDL_MapRGB(const SDL_PixelFormat * format, Uint8 r, Uint8 g, Uint8 b)
{
if (format->palette == NULL) {
return (r >> format->Rloss) << format->Rshift
@ -550,8 +549,8 @@ SDL_MapRGB(const SDL_PixelFormat * const format, const Uint8 r, const Uint8 g,
/* Find the pixel value corresponding to an RGBA quadruple */
Uint32
SDL_MapRGBA(const SDL_PixelFormat * const format, const Uint8 r,
const Uint8 g, const Uint8 b, const Uint8 a)
SDL_MapRGBA(const SDL_PixelFormat * format, Uint8 r, Uint8 g, Uint8 b,
Uint8 a)
{
if (format->palette == NULL) {
return (r >> format->Rloss) << format->Rshift
@ -564,10 +563,37 @@ SDL_MapRGBA(const SDL_PixelFormat * const format, const Uint8 r,
}
void
SDL_GetRGBA(Uint32 pixel, SDL_PixelFormat * fmt,
SDL_GetRGB(Uint32 pixel, const SDL_PixelFormat * format, Uint8 * r, Uint8 * g,
Uint8 * b)
{
if (format->palette == NULL) {
/*
* This makes sure that the result is mapped to the
* interval [0..255], and the maximum value for each
* component is 255. This is important to make sure
* that white is indeed reported as (255, 255, 255).
* This only works for RGB bit fields at least 4 bit
* wide, which is almost always the case.
*/
unsigned v;
v = (pixel & format->Rmask) >> format->Rshift;
*r = (v << format->Rloss) + (v >> (8 - (format->Rloss << 1)));
v = (pixel & format->Gmask) >> format->Gshift;
*g = (v << format->Gloss) + (v >> (8 - (format->Gloss << 1)));
v = (pixel & format->Bmask) >> format->Bshift;
*b = (v << format->Bloss) + (v >> (8 - (format->Bloss << 1)));
} else {
*r = format->palette->colors[pixel].r;
*g = format->palette->colors[pixel].g;
*b = format->palette->colors[pixel].b;
}
}
void
SDL_GetRGBA(Uint32 pixel, const SDL_PixelFormat * format,
Uint8 * r, Uint8 * g, Uint8 * b, Uint8 * a)
{
if (fmt->palette == NULL) {
if (format->palette == NULL) {
/*
* This makes sure that the result is mapped to the
* interval [0..255], and the maximum value for each
@ -578,46 +604,26 @@ SDL_GetRGBA(Uint32 pixel, SDL_PixelFormat * fmt,
* wide, which is almost always the case.
*/
unsigned v;
v = (pixel & fmt->Rmask) >> fmt->Rshift;
*r = (v << fmt->Rloss) + (v >> (8 - (fmt->Rloss << 1)));
v = (pixel & fmt->Gmask) >> fmt->Gshift;
*g = (v << fmt->Gloss) + (v >> (8 - (fmt->Gloss << 1)));
v = (pixel & fmt->Bmask) >> fmt->Bshift;
*b = (v << fmt->Bloss) + (v >> (8 - (fmt->Bloss << 1)));
if (fmt->Amask) {
v = (pixel & fmt->Amask) >> fmt->Ashift;
*a = (v << fmt->Aloss) + (v >> (8 - (fmt->Aloss << 1)));
v = (pixel & format->Rmask) >> format->Rshift;
*r = (v << format->Rloss) + (v >> (8 - (format->Rloss << 1)));
v = (pixel & format->Gmask) >> format->Gshift;
*g = (v << format->Gloss) + (v >> (8 - (format->Gloss << 1)));
v = (pixel & format->Bmask) >> format->Bshift;
*b = (v << format->Bloss) + (v >> (8 - (format->Bloss << 1)));
if (format->Amask) {
v = (pixel & format->Amask) >> format->Ashift;
*a = (v << format->Aloss) + (v >> (8 - (format->Aloss << 1)));
} else {
*a = SDL_ALPHA_OPAQUE;
}
} else {
*r = fmt->palette->colors[pixel].r;
*g = fmt->palette->colors[pixel].g;
*b = fmt->palette->colors[pixel].b;
*r = format->palette->colors[pixel].r;
*g = format->palette->colors[pixel].g;
*b = format->palette->colors[pixel].b;
*a = SDL_ALPHA_OPAQUE;
}
}
void
SDL_GetRGB(Uint32 pixel, SDL_PixelFormat * fmt, Uint8 * r, Uint8 * g,
Uint8 * b)
{
if (fmt->palette == NULL) {
/* the note for SDL_GetRGBA above applies here too */
unsigned v;
v = (pixel & fmt->Rmask) >> fmt->Rshift;
*r = (v << fmt->Rloss) + (v >> (8 - (fmt->Rloss << 1)));
v = (pixel & fmt->Gmask) >> fmt->Gshift;
*g = (v << fmt->Gloss) + (v >> (8 - (fmt->Gloss << 1)));
v = (pixel & fmt->Bmask) >> fmt->Bshift;
*b = (v << fmt->Bloss) + (v >> (8 - (fmt->Bloss << 1)));
} else {
*r = fmt->palette->colors[pixel].r;
*g = fmt->palette->colors[pixel].g;
*b = fmt->palette->colors[pixel].b;
}
}
/* Apply gamma to a set of colors - this is easy. :) */
void
SDL_ApplyGamma(Uint16 * gamma, SDL_Color * colors, SDL_Color * output,

2
src/video/SDL_rect.c
View file

@ -143,7 +143,6 @@ SDL_AddDirtyRect(SDL_DirtyRectList * list, const SDL_Rect * rect)
dirty->rect = *rect;
dirty->next = list->list;
list->list = dirty;
++list->count;
}
void
@ -164,7 +163,6 @@ SDL_ClearDirtyRects(SDL_DirtyRectList * list)
list->free = list->list;
}
list->list = NULL;
list->count = 0;
}
void

1
src/video/SDL_rect_c.h
View file

@ -29,7 +29,6 @@ typedef struct SDL_DirtyRect
typedef struct SDL_DirtyRectList
{
int count;
SDL_DirtyRect *list;
SDL_DirtyRect *free;
} SDL_DirtyRectList;

2
src/video/SDL_renderer_gl.c
View file

@ -806,7 +806,7 @@ GL_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
int minx, miny, maxx, maxy;
GLfloat minu, maxu, minv, maxv;
if (texturedata->dirty.count > 0) {
if (texturedata->dirty.list) {
SDL_DirtyRect *dirty;
void *pixels;
int bpp = SDL_BYTESPERPIXEL(texture->format);