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SDL_compat.c
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/*
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
*/
#include "SDL_config.h"
/* This file contains functions for backwards compatibility with SDL 1.2 */
#include "SDL.h"
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#include "SDL_syswm.h"
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#include "video/SDL_sysvideo.h"
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#include "video/SDL_pixels_c.h"
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static SDL_WindowID SDL_VideoWindow;
static SDL_TextureID SDL_VideoTexture;
static SDL_Surface *SDL_VideoSurface;
static SDL_Surface *SDL_ShadowSurface;
static SDL_Surface *SDL_PublicSurface;
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static char *wm_title;
char *
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SDL_AudioDriverName(char *namebuf, int maxlen)
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{
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const char *name = SDL_GetCurrentAudioDriver();
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if (name) {
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SDL_strlcpy(namebuf, name, maxlen);
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return namebuf;
}
return NULL;
}
char *
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SDL_VideoDriverName(char *namebuf, int maxlen)
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{
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const char *name = SDL_GetCurrentVideoDriver();
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if (name) {
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SDL_strlcpy(namebuf, name, maxlen);
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return namebuf;
}
return NULL;
}
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const SDL_VideoInfo *
SDL_GetVideoInfo(void)
{
static SDL_VideoInfo info;
/* Memory leak, compatibility code, who cares? */
if (!info.vfmt && SDL_GetDesktopDisplayMode()) {
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
SDL_PixelFormatEnumToMasks(SDL_GetDesktopDisplayMode()->format, &bpp,
&Rmask, &Gmask, &Bmask, &Amask);
info.vfmt = SDL_AllocFormat(bpp, Rmask, Gmask, Bmask, Amask);
}
return &info;
}
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int
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SDL_VideoModeOK(int width, int height, int bpp, Uint32 flags)
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{
int i, actual_bpp = 0;
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if (!SDL_GetVideoDevice()) {
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return 0;
}
if (!(flags & SDL_FULLSCREEN)) {
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return SDL_BITSPERPIXEL(SDL_GetDesktopDisplayMode()->format);
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}
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for (i = 0; i < SDL_GetNumDisplayModes(); ++i) {
const SDL_DisplayMode *mode = SDL_GetDisplayMode(i);
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if (!mode->w || !mode->h || (width == mode->w && height == mode->h)) {
if (!mode->format) {
return bpp;
}
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if (SDL_BITSPERPIXEL(mode->format) >= (Uint32) bpp) {
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actual_bpp = SDL_BITSPERPIXEL(mode->format);
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}
}
}
return actual_bpp;
}
SDL_Rect **
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SDL_ListModes(SDL_PixelFormat * format, Uint32 flags)
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{
int i, nmodes;
SDL_Rect **modes;
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if (!SDL_GetVideoDevice()) {
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return NULL;
}
if (!(flags & SDL_FULLSCREEN)) {
return (SDL_Rect **) (-1);
}
/* Memory leak, but this is a compatibility function, who cares? */
nmodes = 0;
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modes = NULL;
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for (i = 0; i < SDL_GetNumDisplayModes(); ++i) {
const SDL_DisplayMode *mode = SDL_GetDisplayMode(i);
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if (!mode->w || !mode->h) {
return (SDL_Rect **) (-1);
}
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if (SDL_BITSPERPIXEL(mode->format) != format->BitsPerPixel) {
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continue;
}
if (nmodes > 0 && modes[nmodes - 1]->w == mode->w
&& modes[nmodes - 1]->h == mode->h) {
continue;
}
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modes = SDL_realloc(modes, (nmodes + 2) * sizeof(*modes));
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if (!modes) {
return NULL;
}
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modes[nmodes] = (SDL_Rect *) SDL_malloc(sizeof(SDL_Rect));
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if (!modes[nmodes]) {
return NULL;
}
modes[nmodes]->x = 0;
modes[nmodes]->y = 0;
modes[nmodes]->w = mode->w;
modes[nmodes]->h = mode->h;
++nmodes;
}
if (modes) {
modes[nmodes] = NULL;
}
return modes;
}
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static int
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SDL_CompatEventFilter(void *userdata, SDL_Event * event)
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{
SDL_Event fake;
switch (event->type) {
case SDL_WINDOWEVENT:
switch (event->window.event) {
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case SDL_WINDOWEVENT_EXPOSED:
if (!SDL_HasEvent(SDL_VIDEOEXPOSEMASK)) {
fake.type = SDL_VIDEOEXPOSE;
SDL_PushEvent(&fake);
}
break;
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case SDL_WINDOWEVENT_RESIZED:
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;
fake.active.gain = 1;
fake.active.state = SDL_APPINPUTFOCUS;
SDL_PushEvent(&fake);
break;
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case SDL_WINDOWEVENT_CLOSE:
fake.type = SDL_QUIT;
SDL_PushEvent(&fake);
break;
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}
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case SDL_KEYDOWN:
case SDL_KEYUP:
{
Uint32 unicode = 0;
if (event->key.type == SDL_KEYDOWN && event->key.keysym.sym < 256) {
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unicode = event->key.keysym.sym;
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if (unicode >= 'a' && unicode <= 'z') {
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int shifted = !!(event->key.keysym.mod & KMOD_SHIFT);
int capslock = !!(event->key.keysym.mod & KMOD_CAPS);
if ((shifted ^ capslock) != 0) {
unicode = SDL_toupper(unicode);
}
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}
}
if (unicode) {
event->key.keysym.unicode = unicode;
}
break;
}
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case SDL_MOUSEWHEEL:
{
Uint8 button;
int selected;
int x, y;
selected = SDL_SelectMouse(event->wheel.which);
SDL_GetMouseState(&x, &y);
SDL_SelectMouse(selected);
if (event->wheel.motion > 0) {
button = SDL_BUTTON_WHEELUP;
} else {
button = SDL_BUTTON_WHEELDOWN;
}
fake.button.which = event->wheel.windowID;
fake.button.button = button;
fake.button.x = x;
fake.button.y = y;
fake.button.windowID = event->wheel.windowID;
fake.type = SDL_MOUSEBUTTONDOWN;
fake.button.state = SDL_PRESSED;
SDL_PushEvent(&fake);
fake.type = SDL_MOUSEBUTTONUP;
fake.button.state = SDL_RELEASED;
SDL_PushEvent(&fake);
break;
}
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}
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return 1;
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}
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) {
return SDL_SetDisplayPalette(palette->colors, 0, palette->ncolors);
}
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return 0;
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}
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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) {
const SDL_DisplayMode *current = SDL_GetDesktopDisplayMode();
*x = (current->w - w) / 2;
*y = (current->h - h) / 2;
}
}
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SDL_Surface *
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SDL_SetVideoMode(int width, int height, int bpp, Uint32 flags)
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{
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SDL_EventFilter filter;
void *filterparam;
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const SDL_DisplayMode *desktop_mode;
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SDL_DisplayMode mode;
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int window_x = SDL_WINDOWPOS_UNDEFINED;
int window_y = SDL_WINDOWPOS_UNDEFINED;
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Uint32 window_flags;
Uint32 desktop_format;
Uint32 desired_format;
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Uint32 surface_flags;
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if (!SDL_GetVideoDevice()) {
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0) {
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return NULL;
}
}
/* Destroy existing window */
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SDL_PublicSurface = NULL;
if (SDL_ShadowSurface) {
SDL_FreeSurface(SDL_ShadowSurface);
SDL_ShadowSurface = NULL;
}
if (SDL_VideoSurface) {
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SDL_DelPaletteWatch(SDL_VideoSurface->format->palette,
SDL_VideoPaletteChanged, NULL);
SDL_FreeSurface(SDL_VideoSurface);
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SDL_VideoSurface = 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 */
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if (!SDL_GetEventFilter(NULL, NULL)) {
SDL_SetEventFilter(SDL_CompatEventFilter, NULL);
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}
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/* 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;
}
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GetEnvironmentWindowPosition(width, height, &window_x, &window_y);
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SDL_SetFullscreenDisplayMode(NULL);
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SDL_VideoWindow =
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SDL_CreateWindow(wm_title, window_x, window_y, width, height,
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window_flags);
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if (!SDL_VideoWindow) {
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return NULL;
}
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window_flags = SDL_GetWindowFlags(SDL_VideoWindow);
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surface_flags = 0;
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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;
}
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/* Set up the desired display mode */
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desktop_mode = SDL_GetDesktopDisplayMode();
desktop_format = desktop_mode->format;
if (desktop_format && ((flags & SDL_ANYFORMAT)
|| (bpp == SDL_BITSPERPIXEL(desktop_format)))) {
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desired_format = desktop_format;
} else {
switch (bpp) {
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case 0:
if (desktop_format) {
desired_format = desktop_format;
} else {
desired_format = SDL_PixelFormat_RGB888;
}
break;
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case 8:
desired_format = SDL_PixelFormat_Index8;
break;
case 15:
desired_format = SDL_PixelFormat_RGB555;
break;
case 16:
desired_format = SDL_PixelFormat_RGB565;
break;
case 24:
desired_format = SDL_PixelFormat_RGB24;
break;
case 32:
desired_format = SDL_PixelFormat_RGB888;
break;
default:
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SDL_SetError("Unsupported bpp in SDL_SetVideoMode()");
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return NULL;
}
}
mode.format = desired_format;
mode.w = width;
mode.h = height;
mode.refresh_rate = 0;
/* Set the desired display mode */
if (flags & SDL_FULLSCREEN) {
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if (SDL_SetFullscreenDisplayMode(&mode) < 0) {
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return NULL;
}
}
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/* If we're in OpenGL mode, just create a stub surface and we're done! */
if (flags & SDL_OPENGL) {
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;
}
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/* Create a renderer for the window */
if (SDL_CreateRenderer(SDL_VideoWindow, -1, 0) < 0) {
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return NULL;
}
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/* Create a texture for the screen surface */
SDL_VideoTexture =
SDL_CreateTexture(desired_format, SDL_TextureAccess_Local, width,
height);
if (!SDL_VideoTexture) {
SDL_VideoTexture =
SDL_CreateTexture(0, SDL_TextureAccess_Local, width, height);
}
if (!SDL_VideoTexture) {
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return NULL;
}
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/* Create the screen surface */
SDL_VideoSurface = SDL_CreateRGBSurfaceFromTexture(SDL_VideoTexture);
if (!SDL_VideoSurface) {
return NULL;
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}
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SDL_VideoSurface->flags |= surface_flags;
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/* 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);
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SDL_AddPaletteWatch(SDL_VideoSurface->format->palette,
SDL_VideoPaletteChanged, NULL);
SDL_SetPaletteColors(SDL_VideoSurface->format->palette,
SDL_VideoSurface->format->palette->colors, 0,
SDL_VideoSurface->format->palette->ncolors);
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}
/* Create a shadow surface if necessary */
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if (((bpp != SDL_VideoSurface->format->BitsPerPixel)
&& !(flags & SDL_ANYFORMAT))
|| ((SDL_VideoSurface->flags & SDL_HWSURFACE)
&& !(flags & SDL_HWSURFACE))) {
if ((bpp == SDL_VideoSurface->format->BitsPerPixel)
|| (flags & SDL_ANYFORMAT)) {
SDL_ShadowSurface =
SDL_CreateRGBSurface(0, width, height,
SDL_VideoSurface->format->BitsPerPixel,
SDL_VideoSurface->format->Rmask,
SDL_VideoSurface->format->Gmask,
SDL_VideoSurface->format->Bmask,
SDL_VideoSurface->format->Amask);
} else {
SDL_ShadowSurface =
SDL_CreateRGBSurface(0, width, height, bpp, 0, 0, 0, 0);
}
if (!SDL_ShadowSurface) {
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return NULL;
}
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SDL_ShadowSurface->flags |= surface_flags;
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/* 8-bit SDL_ShadowSurface surfaces report that they have exclusive palette */
if (SDL_ShadowSurface->format->palette) {
SDL_ShadowSurface->flags |= SDL_HWPALETTE;
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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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}
}
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SDL_PublicSurface =
(SDL_ShadowSurface ? SDL_ShadowSurface : SDL_VideoSurface);
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/* Clear the surface for display */
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SDL_FillRect(SDL_PublicSurface, NULL, 0);
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/* We're finally done! */
return SDL_PublicSurface;
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}
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SDL_Surface *
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SDL_GetVideoSurface(void)
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{
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return SDL_PublicSurface;
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}
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SDL_Surface *
SDL_DisplayFormat(SDL_Surface * surface)
{
Uint32 flags;
if (!SDL_PublicSurface) {
SDL_SetError("No video mode has been set");
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return NULL;
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}
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/* Set the flags appropriate for copying to display surface */
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flags = SDL_SWSURFACE;
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#ifdef AUTORLE_DISPLAYFORMAT
flags |= (surface->flags & (SDL_SRCCOLORKEY | SDL_SRCALPHA));
flags |= SDL_RLEACCELOK;
#else
flags |=
surface->flags & (SDL_SRCCOLORKEY | SDL_SRCALPHA | SDL_RLEACCELOK);
#endif
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return SDL_ConvertSurface(surface, SDL_PublicSurface->format, flags);
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}
SDL_Surface *
SDL_DisplayFormatAlpha(SDL_Surface * surface)
{
SDL_PixelFormat *vf;
SDL_PixelFormat *format;
SDL_Surface *converted;
Uint32 flags;
/* 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");
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return NULL;
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}
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);
flags = SDL_PublicSurface->flags & SDL_HWSURFACE;
flags |= surface->flags & (SDL_SRCALPHA | SDL_RLEACCELOK);
converted = SDL_ConvertSurface(surface, format, flags);
SDL_FreeFormat(format);
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return converted;
}
int
SDL_Flip(SDL_Surface * screen)
{
SDL_UpdateRect(screen, 0, 0, 0, 0);
return 0;
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}
void
SDL_UpdateRect(SDL_Surface * screen, Sint32 x, Sint32 y, Uint32 w, Uint32 h)
{
if (screen) {
SDL_Rect rect;
/* Perform some checking */
if (w == 0)
w = screen->w;
if (h == 0)
h = screen->h;
if ((int) (x + w) > screen->w)
return;
if ((int) (y + h) > screen->h)
return;
/* Fill the rectangle */
rect.x = (Sint16) x;
rect.y = (Sint16) y;
rect.w = (Uint16) w;
rect.h = (Uint16) h;
SDL_UpdateRects(screen, 1, &rect);
}
}
void
SDL_UpdateRects(SDL_Surface * screen, int numrects, SDL_Rect * rects)
{
int i;
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if (screen == SDL_ShadowSurface) {
for (i = 0; i < numrects; ++i) {
SDL_LowerBlit(SDL_ShadowSurface, &rects[i], SDL_VideoSurface,
&rects[i]);
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}
/* Fall through to video surface update */
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screen = SDL_VideoSurface;
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}
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if (screen == SDL_VideoSurface) {
for (i = 0; i < numrects; ++i) {
SDL_RenderCopy(SDL_VideoTexture, &rects[i], &rects[i],
SDL_TextureBlendMode_None,
SDL_TextureScaleMode_None);
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}
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SDL_RenderPresent();
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}
}
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void
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SDL_WM_SetCaption(const char *title, const char *icon)
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{
if (wm_title) {
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SDL_free(wm_title);
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} else {
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wm_title = SDL_strdup(title);
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}
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SDL_SetWindowTitle(SDL_VideoWindow, wm_title);
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}
void
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SDL_WM_GetCaption(char **title, char **icon)
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{
if (title) {
*title = wm_title;
}
if (icon) {
*icon = "";
}
}
void
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SDL_WM_SetIcon(SDL_Surface * icon, Uint8 * mask)
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{
/* FIXME */
}
int
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SDL_WM_IconifyWindow(void)
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{
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SDL_MinimizeWindow(SDL_VideoWindow);
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return 0;
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}
int
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SDL_WM_ToggleFullScreen(SDL_Surface * surface)
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{
return 0;
}
SDL_GrabMode
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SDL_WM_GrabInput(SDL_GrabMode mode)
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{
if (mode != SDL_GRAB_QUERY) {
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SDL_SetWindowGrab(SDL_VideoWindow, mode);
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}
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return (SDL_GrabMode) SDL_GetWindowGrab(SDL_VideoWindow);
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}
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void
SDL_WarpMouse(Uint16 x, Uint16 y)
{
SDL_WarpMouseInWindow(SDL_VideoWindow, x, y);
}
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Uint8
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SDL_GetAppState(void)
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{
Uint8 state = 0;
Uint32 flags = 0;
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flags = SDL_GetWindowFlags(SDL_VideoWindow);
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if ((flags & SDL_WINDOW_SHOWN) && !(flags & SDL_WINDOW_MINIMIZED)) {
state |= SDL_APPACTIVE;
}
if (flags & SDL_WINDOW_KEYBOARD_FOCUS) {
state |= SDL_APPINPUTFOCUS;
}
if (flags & SDL_WINDOW_MOUSE_FOCUS) {
state |= SDL_APPMOUSEFOCUS;
}
return state;
}
const SDL_version *
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SDL_Linked_Version(void)
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{
static SDL_version version;
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SDL_VERSION(&version);
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return &version;
}
int
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SDL_SetPalette(SDL_Surface * surface, int flags, const SDL_Color * colors,
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int firstcolor, int ncolors)
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{
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return SDL_SetColors(surface, colors, firstcolor, ncolors);
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}
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int
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SDL_SetColors(SDL_Surface * surface, const SDL_Color * colors, int firstcolor,
int ncolors)
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{
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if (SDL_SetPaletteColors
(surface->format->palette, colors, firstcolor, ncolors) == 0) {
return 1;
} else {
return 0;
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}
}
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int
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SDL_GetWMInfo(SDL_SysWMinfo * info)
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{
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return SDL_GetWindowWMInfo(SDL_VideoWindow, info);
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}
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#if 0
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void
SDL_MoveCursor(int x, int y)
{
SDL_VideoDevice *_this = SDL_GetVideoDevice();
/* Erase and update the current mouse position */
if (SHOULD_DRAWCURSOR(SDL_cursorstate)) {
/* Erase and redraw mouse cursor in new position */
SDL_LockCursor();
SDL_EraseCursor(SDL_VideoSurface);
SDL_cursor->area.x = (x - SDL_cursor->hot_x);
SDL_cursor->area.y = (y - SDL_cursor->hot_y);
SDL_DrawCursor(SDL_VideoSurface);
SDL_UnlockCursor();
} else if (_this->MoveWMCursor) {
_this->MoveWMCursor(_this, x, y);
}
}
/* Keep track of the current cursor colors */
static int palette_changed = 1;
static Uint8 pixels8[2];
void
SDL_CursorPaletteChanged(void)
{
palette_changed = 1;
}
void
SDL_MouseRect(SDL_Rect * area)
{
SDL_VideoDevice *_this = SDL_GetVideoDevice();
int clip_diff;
*area = SDL_cursor->area;
if (area->x < 0) {
area->w += area->x;
area->x = 0;
}
if (area->y < 0) {
area->h += area->y;
area->y = 0;
}
clip_diff = (area->x + area->w) - SDL_VideoSurface->w;
if (clip_diff > 0) {
area->w = area->w < clip_diff ? 0 : area->w - clip_diff;
}
clip_diff = (area->y + area->h) - SDL_VideoSurface->h;
if (clip_diff > 0) {
area->h = area->h < clip_diff ? 0 : area->h - clip_diff;
}
}
static void
SDL_DrawCursorFast(SDL_Surface * screen, SDL_Rect * area)
{
const Uint32 pixels[2] = { 0xFFFFFFFF, 0x00000000 };
int i, w, h;
Uint8 *data, datab;
Uint8 *mask, maskb;
data = SDL_cursor->data + area->y * SDL_cursor->area.w / 8;
mask = SDL_cursor->mask + area->y * SDL_cursor->area.w / 8;
switch (screen->format->BytesPerPixel) {
case 1:
{
Uint8 *dst;
int dstskip;
if (palette_changed) {
pixels8[0] =
(Uint8) SDL_MapRGB(screen->format, 255, 255, 255);
pixels8[1] = (Uint8) SDL_MapRGB(screen->format, 0, 0, 0);
palette_changed = 0;
}
dst = (Uint8 *) screen->pixels +
(SDL_cursor->area.y + area->y) * screen->pitch +
SDL_cursor->area.x;
dstskip = screen->pitch - area->w;
for (h = area->h; h; h--) {
for (w = area->w / 8; w; w--) {
maskb = *mask++;
datab = *data++;
for (i = 0; i < 8; ++i) {
if (maskb & 0x80) {
*dst = pixels8[datab >> 7];
}
maskb <<= 1;
datab <<= 1;
dst++;
}
}
dst += dstskip;
}
}
break;
case 2:
{
Uint16 *dst;
int dstskip;
dst = (Uint16 *) screen->pixels +
(SDL_cursor->area.y + area->y) * screen->pitch / 2 +
SDL_cursor->area.x;
dstskip = (screen->pitch / 2) - area->w;
for (h = area->h; h; h--) {
for (w = area->w / 8; w; w--) {
maskb = *mask++;
datab = *data++;
for (i = 0; i < 8; ++i) {
if (maskb & 0x80) {
*dst = (Uint16) pixels[datab >> 7];
}
maskb <<= 1;
datab <<= 1;
dst++;
}
}
dst += dstskip;
}
}
break;
case 3:
{
Uint8 *dst;
int dstskip;
dst = (Uint8 *) screen->pixels +
(SDL_cursor->area.y + area->y) * screen->pitch +
SDL_cursor->area.x * 3;
dstskip = screen->pitch - area->w * 3;
for (h = area->h; h; h--) {
for (w = area->w / 8; w; w--) {
maskb = *mask++;
datab = *data++;
for (i = 0; i < 8; ++i) {
if (maskb & 0x80) {
SDL_memset(dst, pixels[datab >> 7], 3);
}
maskb <<= 1;
datab <<= 1;
dst += 3;
}
}
dst += dstskip;
}
}
break;
case 4:
{
Uint32 *dst;
int dstskip;
dst = (Uint32 *) screen->pixels +
(SDL_cursor->area.y + area->y) * screen->pitch / 4 +
SDL_cursor->area.x;
dstskip = (screen->pitch / 4) - area->w;
for (h = area->h; h; h--) {
for (w = area->w / 8; w; w--) {
maskb = *mask++;
datab = *data++;
for (i = 0; i < 8; ++i) {
if (maskb & 0x80) {
*dst = pixels[datab >> 7];
}
maskb <<= 1;
datab <<= 1;
dst++;
}
}
dst += dstskip;
}
}
break;
}
}
static void
SDL_DrawCursorSlow(SDL_Surface * screen, SDL_Rect * area)
{
const Uint32 pixels[2] = { 0xFFFFFF, 0x000000 };
int h;
int x, minx, maxx;
Uint8 *data, datab = 0;
Uint8 *mask, maskb = 0;
Uint8 *dst;
int dstbpp, dstskip;
data = SDL_cursor->data + area->y * SDL_cursor->area.w / 8;
mask = SDL_cursor->mask + area->y * SDL_cursor->area.w / 8;
dstbpp = screen->format->BytesPerPixel;
dst = (Uint8 *) screen->pixels +
(SDL_cursor->area.y + area->y) * screen->pitch +
SDL_cursor->area.x * dstbpp;
dstskip = screen->pitch - SDL_cursor->area.w * dstbpp;
minx = area->x;
maxx = area->x + area->w;
if (screen->format->BytesPerPixel == 1) {
if (palette_changed) {
pixels8[0] = (Uint8) SDL_MapRGB(screen->format, 255, 255, 255);
pixels8[1] = (Uint8) SDL_MapRGB(screen->format, 0, 0, 0);
palette_changed = 0;
}
for (h = area->h; h; h--) {
for (x = 0; x < SDL_cursor->area.w; ++x) {
if ((x % 8) == 0) {
maskb = *mask++;
datab = *data++;
}
if ((x >= minx) && (x < maxx)) {
if (maskb & 0x80) {
SDL_memset(dst, pixels8[datab >> 7], dstbpp);
}
}
maskb <<= 1;
datab <<= 1;
dst += dstbpp;
}