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SDL_compat.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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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
*/
#include "SDL_config.h"
/* This file contains functions for backwards compatibility with SDL 1.2 */
#include "SDL.h"
#include "SDL_syswm.h"
#include "video/SDL_sysvideo.h"
#include "video/SDL_pixels_c.h"
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#include "video/SDL_yuv_sw_c.h"
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static SDL_WindowID SDL_VideoWindow = 0;
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static SDL_RendererInfo SDL_VideoRendererInfo;
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static SDL_TextureID SDL_VideoTexture = 0;
static SDL_Surface *SDL_VideoSurface = NULL;
static SDL_Surface *SDL_ShadowSurface = NULL;
static SDL_Surface *SDL_PublicSurface = NULL;
static SDL_GLContext *SDL_VideoContext = NULL;
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static Uint32 SDL_VideoFlags = 0;
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static char *wm_title = NULL;
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static SDL_Surface *SDL_VideoIcon;
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static int SDL_enabled_UNICODE = 0;
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char *
SDL_AudioDriverName(char *namebuf, int maxlen)
{
const char *name = SDL_GetCurrentAudioDriver();
if (name) {
SDL_strlcpy(namebuf, name, maxlen);
return namebuf;
}
return NULL;
}
char *
SDL_VideoDriverName(char *namebuf, int maxlen)
{
const char *name = SDL_GetCurrentVideoDriver();
if (name) {
SDL_strlcpy(namebuf, name, maxlen);
return namebuf;
}
return NULL;
}
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static void
SelectVideoDisplay()
{
const char *variable = SDL_getenv("SDL_VIDEO_FULLSCREEN_DISPLAY");
if ( !variable ) {
variable = SDL_getenv("SDL_VIDEO_FULLSCREEN_HEAD");
}
if ( variable ) {
SDL_SelectVideoDisplay(SDL_atoi(variable));
}
}
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const SDL_VideoInfo *
SDL_GetVideoInfo(void)
{
static SDL_VideoInfo info;
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SDL_DisplayMode mode;
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SelectVideoDisplay();
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/* Memory leak, compatibility code, who cares? */
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if (!info.vfmt && SDL_GetDesktopDisplayMode(&mode) == 0) {
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int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
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SDL_PixelFormatEnumToMasks(mode.format, &bpp, &Rmask, &Gmask, &Bmask,
&Amask);
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info.vfmt = SDL_AllocFormat(bpp, Rmask, Gmask, Bmask, Amask);
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info.current_w = mode.w;
info.current_h = mode.h;
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}
return &info;
}
int
SDL_VideoModeOK(int width, int height, int bpp, Uint32 flags)
{
int i, actual_bpp = 0;
if (!SDL_GetVideoDevice()) {
return 0;
}
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SelectVideoDisplay();
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if (!(flags & SDL_FULLSCREEN)) {
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SDL_DisplayMode mode;
SDL_GetDesktopDisplayMode(&mode);
return SDL_BITSPERPIXEL(mode.format);
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}
for (i = 0; i < SDL_GetNumDisplayModes(); ++i) {
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SDL_DisplayMode mode;
SDL_GetDisplayMode(i, &mode);
if (!mode.w || !mode.h || (width == mode.w && height == mode.h)) {
if (!mode.format) {
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return bpp;
}
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if (SDL_BITSPERPIXEL(mode.format) >= (Uint32) bpp) {
actual_bpp = SDL_BITSPERPIXEL(mode.format);
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}
}
}
return actual_bpp;
}
SDL_Rect **
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SDL_ListModes(const SDL_PixelFormat * format, Uint32 flags)
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{
int i, nmodes;
SDL_Rect **modes;
if (!SDL_GetVideoDevice()) {
return NULL;
}
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SelectVideoDisplay();
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if (!(flags & SDL_FULLSCREEN)) {
return (SDL_Rect **) (-1);
}
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if (!format) {
format = SDL_GetVideoInfo()->vfmt;
}
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/* Memory leak, but this is a compatibility function, who cares? */
nmodes = 0;
modes = NULL;
for (i = 0; i < SDL_GetNumDisplayModes(); ++i) {
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SDL_DisplayMode mode;
SDL_GetDisplayMode(i, &mode);
if (!mode.w || !mode.h) {
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return (SDL_Rect **) (-1);
}
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if (SDL_BITSPERPIXEL(mode.format) != format->BitsPerPixel) {
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continue;
}
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if (nmodes > 0 && modes[nmodes - 1]->w == mode.w
&& modes[nmodes - 1]->h == mode.h) {
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continue;
}
modes = SDL_realloc(modes, (nmodes + 2) * sizeof(*modes));
if (!modes) {
return NULL;
}
modes[nmodes] = (SDL_Rect *) SDL_malloc(sizeof(SDL_Rect));
if (!modes[nmodes]) {
return NULL;
}
modes[nmodes]->x = 0;
modes[nmodes]->y = 0;
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modes[nmodes]->w = mode.w;
modes[nmodes]->h = mode.h;
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++nmodes;
}
if (modes) {
modes[nmodes] = NULL;
}
return modes;
}
static int
SDL_CompatEventFilter(void *userdata, SDL_Event * event)
{
SDL_Event fake;
switch (event->type) {
case SDL_WINDOWEVENT:
switch (event->window.event) {
case SDL_WINDOWEVENT_EXPOSED:
if (!SDL_HasEvent(SDL_VIDEOEXPOSEMASK)) {
fake.type = SDL_VIDEOEXPOSE;
SDL_PushEvent(&fake);
}
break;
case SDL_WINDOWEVENT_RESIZED:
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SDL_PeepEvents(&fake, 1, SDL_GETEVENT, SDL_VIDEORESIZEMASK);
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fake.type = SDL_VIDEORESIZE;
fake.resize.w = event->window.data1;
fake.resize.h = event->window.data2;
SDL_PushEvent(&fake);
break;
case SDL_WINDOWEVENT_MINIMIZED:
fake.type = SDL_ACTIVEEVENT;
fake.active.gain = 0;
fake.active.state = SDL_APPACTIVE;
SDL_PushEvent(&fake);
break;
case SDL_WINDOWEVENT_RESTORED:
fake.type = SDL_ACTIVEEVENT;
fake.active.gain = 1;
fake.active.state = SDL_APPACTIVE;
SDL_PushEvent(&fake);
break;
case SDL_WINDOWEVENT_ENTER:
fake.type = SDL_ACTIVEEVENT;
fake.active.gain = 1;
fake.active.state = SDL_APPMOUSEFOCUS;
SDL_PushEvent(&fake);
break;
case SDL_WINDOWEVENT_LEAVE:
fake.type = SDL_ACTIVEEVENT;
fake.active.gain = 0;
fake.active.state = SDL_APPMOUSEFOCUS;
SDL_PushEvent(&fake);
break;
case SDL_WINDOWEVENT_FOCUS_GAINED:
fake.type = SDL_ACTIVEEVENT;
fake.active.gain = 1;
fake.active.state = SDL_APPINPUTFOCUS;
SDL_PushEvent(&fake);
break;
case SDL_WINDOWEVENT_FOCUS_LOST:
fake.type = SDL_ACTIVEEVENT;
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fake.active.gain = 0;
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fake.active.state = SDL_APPINPUTFOCUS;
SDL_PushEvent(&fake);
break;
case SDL_WINDOWEVENT_CLOSE:
fake.type = SDL_QUIT;
SDL_PushEvent(&fake);
break;
}
case SDL_KEYDOWN:
case SDL_KEYUP:
{
Uint32 unicode = 0;
if (event->key.type == SDL_KEYDOWN && event->key.keysym.sym < 256) {
unicode = event->key.keysym.sym;
if (unicode >= 'a' && unicode <= 'z') {
int shifted = !!(event->key.keysym.mod & KMOD_SHIFT);
int capslock = !!(event->key.keysym.mod & KMOD_CAPS);
if ((shifted ^ capslock) != 0) {
unicode = SDL_toupper(unicode);
}
}
}
if (unicode) {
event->key.keysym.unicode = unicode;
}
break;
}
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case SDL_TEXTINPUT:
{
/* FIXME: Generate an old style key repeat event if needed */
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//printf("TEXTINPUT: '%s'\n", event->text.text);
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break;
}
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case SDL_MOUSEWHEEL:
{
Uint8 button;
int selected;
int x, y;
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if (event->wheel.y == 0) {
break;
}
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selected = SDL_SelectMouse(event->wheel.which);
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SDL_GetMouseState(&x, &y);
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SDL_SelectMouse(selected);
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if (event->wheel.y > 0) {
button = SDL_BUTTON_WHEELUP;
} else {
button = SDL_BUTTON_WHEELDOWN;
}
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fake.button.which = event->wheel.windowID;
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fake.button.button = button;
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fake.button.x = x;
fake.button.y = y;
fake.button.windowID = event->wheel.windowID;
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fake.type = SDL_MOUSEBUTTONDOWN;
fake.button.state = SDL_PRESSED;
SDL_PushEvent(&fake);
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fake.type = SDL_MOUSEBUTTONUP;
fake.button.state = SDL_RELEASED;
SDL_PushEvent(&fake);
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break;
}
}
return 1;
}
static int
SDL_VideoPaletteChanged(void *userdata, SDL_Palette * palette)
{
if (userdata == SDL_ShadowSurface) {
/* If the shadow palette changed, make the changes visible */
if (!SDL_VideoSurface->format->palette) {
SDL_UpdateRect(SDL_ShadowSurface, 0, 0, 0, 0);
}
}
if (userdata == SDL_VideoSurface) {
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if (SDL_SetDisplayPalette(palette->colors, 0, palette->ncolors) < 0) {
return -1;
}
if (SDL_SetTexturePalette
(SDL_VideoTexture, palette->colors, 0, palette->ncolors) < 0) {
return -1;
}
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}
return 0;
}
static void
GetEnvironmentWindowPosition(int w, int h, int *x, int *y)
{
const char *window = SDL_getenv("SDL_VIDEO_WINDOW_POS");
const char *center = SDL_getenv("SDL_VIDEO_CENTERED");
if (window) {
if (SDL_sscanf(window, "%d,%d", x, y) == 2) {
return;
}
if (SDL_strcmp(window, "center") == 0) {
center = window;
}
}
if (center) {
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SDL_DisplayMode mode;
SDL_GetDesktopDisplayMode(&mode);
*x = (mode.w - w) / 2;
*y = (mode.h - h) / 2;
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}
}
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static SDL_Surface *
CreateVideoSurface(SDL_TextureID textureID)
{
SDL_Surface *surface;
Uint32 format;
int w, h;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
void *pixels;
int pitch;
if (SDL_QueryTexture(textureID, &format, NULL, &w, &h) < 0) {
return NULL;
}
if (!SDL_PixelFormatEnumToMasks
(format, &bpp, &Rmask, &Gmask, &Bmask, &Amask)) {
SDL_SetError("Unknown texture format");
return NULL;
}
if (SDL_QueryTexturePixels(textureID, &pixels, &pitch) == 0) {
surface =
SDL_CreateRGBSurfaceFrom(pixels, w, h, bpp, pitch, Rmask, Gmask,
Bmask, Amask);
} else {
surface =
SDL_CreateRGBSurface(0, w, h, bpp, Rmask, Gmask, Bmask, Amask);
}
return surface;
}
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static void
ClearVideoSurface()
{
Uint32 black;
/* Clear the surface for display */
black = SDL_MapRGB(SDL_PublicSurface->format, 0, 0, 0);
SDL_FillRect(SDL_PublicSurface, NULL, black);
SDL_UpdateRect(SDL_PublicSurface, 0, 0, 0, 0);
}
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static void
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SetupScreenSaver(int flags)
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{
const char *env;
SDL_bool allow_screensaver;
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/* Allow environment override of screensaver disable */
env = SDL_getenv("SDL_VIDEO_ALLOW_SCREENSAVER");
if (env) {
allow_screensaver = SDL_atoi(env) ? SDL_TRUE : SDL_FALSE;
} else if (flags & SDL_FULLSCREEN) {
allow_screensaver = SDL_FALSE;
} else {
allow_screensaver = SDL_TRUE;
}
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if (allow_screensaver) {
SDL_EnableScreenSaver();
} else {
SDL_DisableScreenSaver();
}
}
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int
SDL_ResizeVideoMode(int width, int height, int bpp, Uint32 flags)
{
int w, h;
Uint32 format;
int access;
void *pixels;
int pitch;
/* We can't resize something we don't have... */
if (!SDL_VideoWindow) {
return -1;
}
/* We probably have to recreate the window in fullscreen mode */
if (flags & SDL_FULLSCREEN) {
return -1;
}
/* I don't think there's any change we can gracefully make in flags */
if (flags != SDL_VideoFlags) {
return -1;
}
/* Resize the window */
SDL_GetWindowSize(SDL_VideoWindow, &w, &h);
if (w != width || h != height) {
SDL_SetWindowSize(SDL_VideoWindow, width, height);
}
/* If we're in OpenGL mode, just resize the stub surface and we're done! */
if (flags & SDL_OPENGL) {
SDL_VideoSurface->w = width;
SDL_VideoSurface->h = height;
return 0;
}
/* Destroy the screen texture and recreate it */
SDL_QueryTexture(SDL_VideoTexture, &format, &access, &w, &h);
SDL_DestroyTexture(SDL_VideoTexture);
SDL_VideoTexture = SDL_CreateTexture(format, access, width, height);
if (!SDL_VideoTexture) {
return -1;
}
SDL_VideoSurface->w = width;
SDL_VideoSurface->h = height;
if (SDL_QueryTexturePixels(SDL_VideoTexture, &pixels, &pitch) == 0) {
SDL_VideoSurface->pixels = pixels;
SDL_VideoSurface->pitch = pitch;
} else {
SDL_CalculatePitch(SDL_VideoSurface);
SDL_VideoSurface->pixels =
SDL_realloc(SDL_VideoSurface->pixels,
SDL_VideoSurface->h * SDL_VideoSurface->pitch);
}
SDL_SetClipRect(SDL_VideoSurface, NULL);
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SDL_InvalidateMap(SDL_VideoSurface->map);
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if (SDL_ShadowSurface) {
SDL_ShadowSurface->w = width;
SDL_ShadowSurface->h = height;
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SDL_ShadowSurface->pitch = SDL_CalculatePitch(SDL_ShadowSurface);
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SDL_ShadowSurface->pixels =
SDL_realloc(SDL_ShadowSurface->pixels,
SDL_ShadowSurface->h * SDL_ShadowSurface->pitch);
SDL_SetClipRect(SDL_ShadowSurface, NULL);
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SDL_InvalidateMap(SDL_ShadowSurface->map);
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}
ClearVideoSurface();
return 0;
}
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SDL_Surface *
SDL_SetVideoMode(int width, int height, int bpp, Uint32 flags)
{
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SDL_DisplayMode desktop_mode;
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int window_x = SDL_WINDOWPOS_UNDEFINED;
int window_y = SDL_WINDOWPOS_UNDEFINED;
Uint32 window_flags;
Uint32 desktop_format;
Uint32 desired_format;
Uint32 surface_flags;
if (!SDL_GetVideoDevice()) {
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0) {
return NULL;
}
}
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SelectVideoDisplay();
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SDL_GetDesktopDisplayMode(&desktop_mode);
if (width == 0) {
width = desktop_mode.w;
}
if (height == 0) {
height = desktop_mode.h;
}
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/* See if we can simply resize the existing window and surface */
if (SDL_ResizeVideoMode(width, height, bpp, flags) == 0) {
return SDL_PublicSurface;
}
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/* Destroy existing window */
SDL_PublicSurface = NULL;
if (SDL_ShadowSurface) {
SDL_FreeSurface(SDL_ShadowSurface);
SDL_ShadowSurface = NULL;
}
if (SDL_VideoSurface) {
SDL_DelPaletteWatch(SDL_VideoSurface->format->palette,
SDL_VideoPaletteChanged, NULL);
SDL_FreeSurface(SDL_VideoSurface);
SDL_VideoSurface = NULL;
}
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if (SDL_VideoContext) {
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/* SDL_GL_MakeCurrent(0, NULL); *//* Doesn't do anything */
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SDL_GL_DeleteContext(SDL_VideoContext);
SDL_VideoContext = NULL;
}
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if (SDL_VideoWindow) {
SDL_GetWindowPosition(SDL_VideoWindow, &window_x, &window_y);
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SDL_DestroyWindow(SDL_VideoWindow);
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}
/* Set up the event filter */
if (!SDL_GetEventFilter(NULL, NULL)) {
SDL_SetEventFilter(SDL_CompatEventFilter, NULL);
}
/* Create a new window */
window_flags = SDL_WINDOW_SHOWN;
if (flags & SDL_FULLSCREEN) {
window_flags |= SDL_WINDOW_FULLSCREEN;
}
if (flags & SDL_OPENGL) {
window_flags |= SDL_WINDOW_OPENGL;
}
if (flags & SDL_RESIZABLE) {
window_flags |= SDL_WINDOW_RESIZABLE;
}
if (flags & SDL_NOFRAME) {
window_flags |= SDL_WINDOW_BORDERLESS;
}
GetEnvironmentWindowPosition(width, height, &window_x, &window_y);
SDL_VideoWindow =
SDL_CreateWindow(wm_title, window_x, window_y, width, height,
window_flags);
if (!SDL_VideoWindow) {
return NULL;
}
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SDL_SetWindowIcon(SDL_VideoWindow, SDL_VideoIcon);
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window_flags = SDL_GetWindowFlags(SDL_VideoWindow);
surface_flags = 0;
if (window_flags & SDL_WINDOW_FULLSCREEN) {
surface_flags |= SDL_FULLSCREEN;
}
if (window_flags & SDL_WINDOW_OPENGL) {
surface_flags |= SDL_OPENGL;
}
if (window_flags & SDL_WINDOW_RESIZABLE) {
surface_flags |= SDL_RESIZABLE;
}
if (window_flags & SDL_WINDOW_BORDERLESS) {
surface_flags |= SDL_NOFRAME;
}
/* Set up the desired display mode */
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desktop_format = desktop_mode.format;
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if (desktop_format && ((flags & SDL_ANYFORMAT)
|| (bpp == SDL_BITSPERPIXEL(desktop_format)))) {
desired_format = desktop_format;
} else {
switch (bpp) {
case 0:
if (desktop_format) {
desired_format = desktop_format;
} else {
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desired_format = SDL_PIXELFORMAT_RGB888;
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}
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bpp = SDL_BITSPERPIXEL(desired_format);
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break;
case 8:
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desired_format = SDL_PIXELFORMAT_INDEX8;
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break;
case 15:
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desired_format = SDL_PIXELFORMAT_RGB555;
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break;
case 16:
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desired_format = SDL_PIXELFORMAT_RGB565;
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break;
case 24:
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desired_format = SDL_PIXELFORMAT_RGB24;
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break;
case 32:
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desired_format = SDL_PIXELFORMAT_RGB888;
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break;
default:
SDL_SetError("Unsupported bpp in SDL_SetVideoMode()");
return NULL;
}
}
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/* Set up the desired display mode */
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if (flags & SDL_FULLSCREEN) {
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SDL_DisplayMode mode;
SDL_zero(mode);
mode.format = desired_format;
if (SDL_SetWindowDisplayMode(SDL_VideoWindow, &mode) < 0) {
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return NULL;
}
}
/* If we're in OpenGL mode, just create a stub surface and we're done! */
if (flags & SDL_OPENGL) {
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SDL_VideoContext = SDL_GL_CreateContext(SDL_VideoWindow);
if (!SDL_VideoContext) {
return NULL;
}
if (SDL_GL_MakeCurrent(SDL_VideoWindow, SDL_VideoContext) < 0) {
return NULL;
}
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SDL_VideoSurface =
SDL_CreateRGBSurfaceFrom(NULL, width, height, bpp, 0, 0, 0, 0, 0);
if (!SDL_VideoSurface) {
return NULL;
}
SDL_VideoSurface->flags |= surface_flags;
SDL_PublicSurface = SDL_VideoSurface;
return SDL_PublicSurface;
}
/* Create a renderer for the window */
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if (SDL_CreateRenderer
(SDL_VideoWindow, -1,
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SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTDISCARD) < 0) {
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return NULL;
}
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SDL_GetRendererInfo(&SDL_VideoRendererInfo);
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/* Create a texture for the screen surface */
SDL_VideoTexture =
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SDL_CreateTexture(desired_format, SDL_TEXTUREACCESS_STREAMING, width,
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height);
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if (!SDL_VideoTexture) {
SDL_VideoTexture =
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SDL_CreateTexture(desktop_format,
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SDL_TEXTUREACCESS_STREAMING, width, height);
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}
if (!SDL_VideoTexture) {
return NULL;
}
/* Create the screen surface */
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SDL_VideoSurface = CreateVideoSurface(SDL_VideoTexture);
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if (!SDL_VideoSurface) {
return NULL;
}
SDL_VideoSurface->flags |= surface_flags;
/* Set a default screen palette */
if (SDL_VideoSurface->format->palette) {
SDL_VideoSurface->flags |= SDL_HWPALETTE;
SDL_DitherColors(SDL_VideoSurface->format->palette->colors,
SDL_VideoSurface->format->BitsPerPixel);
SDL_AddPaletteWatch(SDL_VideoSurface->format->palette,
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SDL_VideoPaletteChanged, SDL_VideoSurface);
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SDL_SetPaletteColors(SDL_VideoSurface->format->palette,
SDL_VideoSurface->format->palette->colors, 0,
SDL_VideoSurface->format->palette->ncolors);
}
/* Create a shadow surface if necessary */
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if ((bpp != SDL_VideoSurface->format->BitsPerPixel)
&& !(flags & SDL_ANYFORMAT)) {
SDL_ShadowSurface =
SDL_CreateRGBSurface(0, width, height, bpp, 0, 0, 0, 0);
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if (!SDL_ShadowSurface) {
return NULL;
}
SDL_ShadowSurface->flags |= surface_flags;
/* 8-bit SDL_ShadowSurface surfaces report that they have exclusive palette */
if (SDL_ShadowSurface->format->palette) {
SDL_ShadowSurface->flags |= SDL_HWPALETTE;
if (SDL_VideoSurface->format->palette) {
SDL_SetSurfacePalette(SDL_ShadowSurface,
SDL_VideoSurface->format->palette);
} else {
SDL_DitherColors(SDL_ShadowSurface->format->palette->colors,
SDL_ShadowSurface->format->BitsPerPixel);
}
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SDL_AddPaletteWatch(SDL_ShadowSurface->format->palette,
SDL_VideoPaletteChanged, SDL_ShadowSurface);
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}
}
SDL_PublicSurface =
(SDL_ShadowSurface ? SDL_ShadowSurface : SDL_VideoSurface);
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SDL_VideoFlags = flags;
ClearVideoSurface();
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SetupScreenSaver(flags);
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/* We're finally done! */
return SDL_PublicSurface;
}
SDL_Surface *
SDL_GetVideoSurface(void)
{
return SDL_PublicSurface;
}
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int
SDL_SetAlpha(SDL_Surface * surface, Uint32 flag, Uint8 value)
{
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if (flag & SDL_SRCALPHA) {
/* According to the docs, value is ignored for alpha surfaces */
if (surface->format->Amask) {
value = 0xFF;
}
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SDL_SetSurfaceAlphaMod(surface, value);
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SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_BLEND);
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} else {
SDL_SetSurfaceAlphaMod(surface, 0xFF);
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SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_NONE);
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}
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SDL_SetSurfaceRLE(surface, (flag & SDL_RLEACCEL));
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return 0;
}
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SDL_Surface *
SDL_DisplayFormat(SDL_Surface * surface)
{
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SDL_PixelFormat *format;
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if (!SDL_PublicSurface) {
SDL_SetError("No video mode has been set");
return NULL;
}
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format = SDL_PublicSurface->format;
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/* Set the flags appropriate for copying to display surface */
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return SDL_ConvertSurface(surface, format, SDL_RLEACCEL);
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}
SDL_Surface *
SDL_DisplayFormatAlpha(SDL_Surface * surface)
{
SDL_PixelFormat *vf;
SDL_PixelFormat *format;
SDL_Surface *converted;
/* default to ARGB8888 */
Uint32 amask = 0xff000000;
Uint32 rmask = 0x00ff0000;
Uint32 gmask = 0x0000ff00;
Uint32 bmask = 0x000000ff;
if (!SDL_PublicSurface) {
SDL_SetError("No video mode has been set");
return NULL;
}
vf = SDL_PublicSurface->format;
switch (vf->BytesPerPixel) {
case 2:
/* For XGY5[56]5, use, AXGY8888, where {X, Y} = {R, B}.
For anything else (like ARGB4444) it doesn't matter
since we have no special code for it anyway */
if ((vf->Rmask == 0x1f) &&
(vf->Bmask == 0xf800 || vf->Bmask == 0x7c00)) {
rmask = 0xff;
bmask = 0xff0000;
}
break;
case 3:
case 4:
/* Keep the video format, as long as the high 8 bits are
unused or alpha */
if ((vf->Rmask == 0xff) && (vf->Bmask == 0xff0000)) {
rmask = 0xff;
bmask = 0xff0000;
}
break;
default:
/* We have no other optimised formats right now. When/if a new
optimised alpha format is written, add the converter here */
break;
}
format = SDL_AllocFormat(32, rmask, gmask, bmask, amask);
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converted = SDL_ConvertSurface(surface, format, SDL_RLEACCEL);
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SDL_FreeFormat(format);
return converted;
}
int
SDL_Flip(SDL_Surface * screen)
{
SDL_UpdateRect(screen, 0, 0, 0, 0);
return 0;
}
void
SDL_UpdateRect(SDL_Surface * screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h)
{
if (screen) {
SDL_Rect rect;
/* Fill the rectangle */
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rect.x = (int) x;
rect.y = (int) y;
rect.w = (int) (w ? w : screen->w);
rect.h = (int) (h ? h : screen->h);
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SDL_UpdateRects(screen, 1, &rect);
}
}
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void
SDL_UpdateRects(SDL_Surface * screen, int numrects, SDL_Rect * rects)
{
int i;
if (screen == SDL_ShadowSurface) {
for (i = 0; i < numrects; ++i) {
SDL_LowerBlit(SDL_ShadowSurface, &rects[i], SDL_VideoSurface,
&rects[i]);
}
/* Fall through to video surface update */
screen = SDL_VideoSurface;
}
if (screen == SDL_VideoSurface) {
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if (screen->flags & SDL_PREALLOC) {
/* The surface memory is maintained by the renderer */
SDL_DirtyTexture(SDL_VideoTexture, numrects, rects);
} else {
/* The surface memory needs to be copied to texture */
int pitch = screen->pitch;
int psize = screen->format->BytesPerPixel;
for (i = 0; i < numrects; ++i) {
const SDL_Rect *rect = &rects[i];
void *pixels =
(Uint8 *) screen->pixels + rect->y * pitch +
rect->x * psize;
SDL_UpdateTexture(SDL_VideoTexture, rect, pixels, pitch);
}
}
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if (SDL_VideoRendererInfo.flags & SDL_RENDERER_PRESENTCOPY) {
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for (i = 0; i < numrects; ++i) {
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SDL_RenderCopy(SDL_VideoTexture, &rects[i], &rects[i]);
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}
} else {
SDL_Rect rect;
rect.x = 0;
rect.y = 0;
rect.w = screen->w;
rect.h = screen->h;
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SDL_RenderCopy(SDL_VideoTexture, &rect, &rect);
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}
SDL_RenderPresent();
}
}
void
SDL_WM_SetCaption(const char *title, const char *icon)
{
if (wm_title) {
SDL_free(wm_title);
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}
if (title) {
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wm_title = SDL_strdup(title);
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} else {
wm_title = NULL;
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}
SDL_SetWindowTitle(SDL_VideoWindow, wm_title);
}
void
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SDL_WM_GetCaption(const char **title, const char **icon)
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{
if (title) {
*title = wm_title;
}
if (icon) {
*icon = "";
}
}
void
SDL_WM_SetIcon(SDL_Surface * icon, Uint8 * mask)
{
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SDL_VideoIcon = icon;
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}
int
SDL_WM_IconifyWindow(void)
{
SDL_MinimizeWindow(SDL_VideoWindow);
return 0;
}
int
SDL_WM_ToggleFullScreen(SDL_Surface * surface)
{
if (SDL_GetWindowFlags(SDL_VideoWindow) & SDL_WINDOW_FULLSCREEN) {
if (SDL_SetWindowFullscreen(SDL_VideoWindow, 0) < 0) {
return 0;
}
SDL_PublicSurface->flags &= ~SDL_FULLSCREEN;
} else {
if (SDL_SetWindowFullscreen(SDL_VideoWindow, 1) < 0) {
return 0;
}
SDL_PublicSurface->flags |= SDL_FULLSCREEN;
}
return 1;
}
SDL_GrabMode
SDL_WM_GrabInput(SDL_GrabMode mode)
{
if (mode != SDL_GRAB_QUERY) {
SDL_SetWindowGrab(SDL_VideoWindow, mode);
}
return (SDL_GrabMode) SDL_GetWindowGrab(SDL_VideoWindow);
}
void
SDL_WarpMouse(Uint16 x, Uint16 y)
{
SDL_WarpMouseInWindow(SDL_VideoWindow, x, y);
}
Uint8
SDL_GetAppState(void)
{
Uint8 state = 0;
Uint32 flags = 0;
flags = SDL_GetWindowFlags(SDL_VideoWindow);
if ((flags & SDL_WINDOW_SHOWN) && !(flags & SDL_WINDOW_MINIMIZED)) {
state |= SDL_APPACTIVE;
}
if (flags & SDL_WINDOW_INPUT_FOCUS) {
state |= SDL_APPINPUTFOCUS;
}
if (flags & SDL_WINDOW_MOUSE_FOCUS) {
state |= SDL_APPMOUSEFOCUS;
}
return state;
}
const SDL_version *
SDL_Linked_Version(void)
{
static SDL_version version;
SDL_VERSION(&version);
return &version;
}
int
SDL_SetPalette(SDL_Surface * surface, int flags, const SDL_Color * colors,
int firstcolor, int ncolors)
{