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SDL_x11render.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2010 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"
#if SDL_VIDEO_RENDER_X11
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#include <limits.h> /* For INT_MIN and INT_MAX */
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#include "SDL_x11video.h"
#include "../SDL_rect_c.h"
#include "../SDL_pixels_c.h"
#include "../SDL_yuv_sw_c.h"
/* X11 renderer implementation */
static SDL_Renderer *X11_CreateRenderer(SDL_Window * window, Uint32 flags);
static int X11_DisplayModeChanged(SDL_Renderer * renderer);
static int X11_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture);
static int X11_QueryTexturePixels(SDL_Renderer * renderer,
SDL_Texture * texture, void **pixels,
int *pitch);
static int X11_SetTextureBlendMode(SDL_Renderer * renderer,
SDL_Texture * texture);
static int X11_SetTextureScaleMode(SDL_Renderer * renderer,
SDL_Texture * texture);
static int X11_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels,
int pitch);
static int X11_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty,
void **pixels, int *pitch);
static void X11_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture);
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static int X11_SetDrawBlendMode(SDL_Renderer * renderer);
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static int X11_RenderDrawPoints(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int X11_RenderDrawLines(SDL_Renderer * renderer,
const SDL_Point * points, int count);
static int X11_RenderDrawRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
static int X11_RenderFillRects(SDL_Renderer * renderer,
const SDL_Rect ** rects, int count);
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static int X11_RenderCopy(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * srcrect, const SDL_Rect * dstrect);
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static int X11_RenderReadPixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, void * pixels, int pitch);
static int X11_RenderWritePixels(SDL_Renderer * renderer, const SDL_Rect * rect,
Uint32 format, const void * pixels, int pitch);
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static void X11_RenderPresent(SDL_Renderer * renderer);
static void X11_DestroyTexture(SDL_Renderer * renderer,
SDL_Texture * texture);
static void X11_DestroyRenderer(SDL_Renderer * renderer);
SDL_RenderDriver X11_RenderDriver = {
X11_CreateRenderer,
{
"x11",
(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY |
SDL_RENDERER_PRESENTFLIP2 | SDL_RENDERER_PRESENTFLIP3 |
SDL_RENDERER_PRESENTDISCARD | SDL_RENDERER_ACCELERATED),
SDL_TEXTUREMODULATE_NONE,
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SDL_BLENDMODE_NONE,
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SDL_TEXTURESCALEMODE_NONE,
0,
{0},
0,
0}
};
typedef struct
{
Display *display;
int screen;
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Visual *visual;
int depth;
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int scanline_pad;
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Window xwindow;
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Pixmap pixmaps[3];
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
Picture xwindow_pict;
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Picture pixmap_picts[3];
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Picture drawable_pict;
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XRenderPictFormat* xwindow_pict_fmt;
XRenderPictureAttributes xwindow_pict_attr;
unsigned int xwindow_pict_attr_valuemask;
SDL_bool xrender_available;
#endif
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int current_pixmap;
Drawable drawable;
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SDL_PixelFormat format;
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GC gc;
SDL_DirtyRectList dirty;
SDL_bool makedirty;
} X11_RenderData;
typedef struct
{
SDL_SW_YUVTexture *yuv;
Uint32 format;
Pixmap pixmap;
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
Picture picture;
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XRenderPictFormat* picture_fmt;
XRenderPictureAttributes picture_attr;
unsigned int picture_attr_valuemask;
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SDL_bool xrender_available;
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#endif
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XImage *image;
#ifndef NO_SHARED_MEMORY
/* MIT shared memory extension information */
XShmSegmentInfo shminfo;
#endif
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XImage *scaling_image;
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void *pixels;
int pitch;
} X11_TextureData;
#ifndef NO_SHARED_MEMORY
/* Shared memory error handler routine */
static int shm_error;
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static int (*X_handler) (Display *, XErrorEvent *) = NULL;
static int
shm_errhandler(Display * d, XErrorEvent * e)
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{
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if (e->error_code == BadAccess) {
shm_error = True;
return (0);
} else {
return (X_handler(d, e));
}
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}
#endif /* ! NO_SHARED_MEMORY */
static void
UpdateYUVTextureData(SDL_Texture * texture)
{
X11_TextureData *data = (X11_TextureData *) texture->driverdata;
SDL_Rect rect;
rect.x = 0;
rect.y = 0;
rect.w = texture->w;
rect.h = texture->h;
SDL_SW_CopyYUVToRGB(data->yuv, &rect, data->format, texture->w,
texture->h, data->pixels, data->pitch);
}
void
X11_AddRenderDriver(_THIS)
{
SDL_RendererInfo *info = &X11_RenderDriver.info;
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SDL_DisplayMode *mode = &SDL_CurrentDisplay->desktop_mode;
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int i;
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info->texture_formats[info->num_texture_formats++] = mode->format;
info->texture_formats[info->num_texture_formats++] = SDL_PIXELFORMAT_YV12;
info->texture_formats[info->num_texture_formats++] = SDL_PIXELFORMAT_IYUV;
info->texture_formats[info->num_texture_formats++] = SDL_PIXELFORMAT_YUY2;
info->texture_formats[info->num_texture_formats++] = SDL_PIXELFORMAT_UYVY;
info->texture_formats[info->num_texture_formats++] = SDL_PIXELFORMAT_YVYU;
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for (i = 0; i < _this->num_displays; ++i) {
SDL_AddRenderDriver(&_this->displays[i], &X11_RenderDriver);
}
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}
SDL_Renderer *
X11_CreateRenderer(SDL_Window * window, Uint32 flags)
{
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SDL_VideoDisplay *display = window->display;
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SDL_DisplayData *displaydata = (SDL_DisplayData *) display->driverdata;
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SDL_WindowData *windowdata = (SDL_WindowData *) window->driverdata;
SDL_Renderer *renderer;
X11_RenderData *data;
XGCValues gcv;
int i, n;
int bpp;
Uint32 Rmask, Gmask, Bmask, Amask;
renderer = (SDL_Renderer *) SDL_calloc(1, sizeof(*renderer));
if (!renderer) {
SDL_OutOfMemory();
return NULL;
}
data = (X11_RenderData *) SDL_calloc(1, sizeof(*data));
if (!data) {
X11_DestroyRenderer(renderer);
SDL_OutOfMemory();
return NULL;
}
data->display = windowdata->videodata->display;
data->screen = displaydata->screen;
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data->visual = displaydata->visual;
data->depth = displaydata->depth;
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data->scanline_pad = displaydata->scanline_pad;
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data->xwindow = windowdata->xwindow;
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
int event_basep, error_basep;
if(XRenderQueryExtension(data->display, &event_basep, &error_basep) == True) {
data->xrender_available = SDL_TRUE;
data->xwindow_pict_fmt = XRenderFindVisualFormat(data->display, data->visual);
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if(!data->xwindow_pict_fmt) {
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data->xrender_available = SDL_FALSE;
}
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data->xwindow_pict_attr.graphics_exposures = False;
data->xwindow_pict_attr_valuemask = CPGraphicsExposure;
data->xwindow_pict = XRenderCreatePicture(data->display, data->xwindow, data->xwindow_pict_fmt,
data->xwindow_pict_attr_valuemask, &data->xwindow_pict_attr);
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if(!data->xwindow_pict) {
data->xrender_available = SDL_FALSE;
}
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}
else {
data->xrender_available = SDL_FALSE;
}
#endif
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renderer->DisplayModeChanged = X11_DisplayModeChanged;
renderer->CreateTexture = X11_CreateTexture;
renderer->QueryTexturePixels = X11_QueryTexturePixels;
renderer->SetTextureBlendMode = X11_SetTextureBlendMode;
renderer->SetTextureScaleMode = X11_SetTextureScaleMode;
renderer->UpdateTexture = X11_UpdateTexture;
renderer->LockTexture = X11_LockTexture;
renderer->UnlockTexture = X11_UnlockTexture;
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renderer->SetDrawBlendMode = X11_SetDrawBlendMode;
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renderer->RenderDrawPoints = X11_RenderDrawPoints;
renderer->RenderDrawLines = X11_RenderDrawLines;
renderer->RenderDrawRects = X11_RenderDrawRects;
renderer->RenderFillRects = X11_RenderFillRects;
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renderer->RenderCopy = X11_RenderCopy;
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renderer->RenderReadPixels = X11_RenderReadPixels;
renderer->RenderWritePixels = X11_RenderWritePixels;
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renderer->RenderPresent = X11_RenderPresent;
renderer->DestroyTexture = X11_DestroyTexture;
renderer->DestroyRenderer = X11_DestroyRenderer;
renderer->info = X11_RenderDriver.info;
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renderer->window = window;
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renderer->driverdata = data;
renderer->info.flags = SDL_RENDERER_ACCELERATED;
if (flags & SDL_RENDERER_SINGLEBUFFER) {
renderer->info.flags |=
(SDL_RENDERER_SINGLEBUFFER | SDL_RENDERER_PRESENTCOPY);
n = 0;
} else if (flags & SDL_RENDERER_PRESENTFLIP2) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP2;
n = 2;
} else if (flags & SDL_RENDERER_PRESENTFLIP3) {
renderer->info.flags |= SDL_RENDERER_PRESENTFLIP3;
n = 3;
} else {
renderer->info.flags |= SDL_RENDERER_PRESENTCOPY;
n = 1;
}
for (i = 0; i < n; ++i) {
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data->pixmaps[i] =
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XCreatePixmap(data->display, data->xwindow, window->w, window->h,
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displaydata->depth);
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if (data->pixmaps[i] == None) {
X11_DestroyRenderer(renderer);
SDL_SetError("XCreatePixmap() failed");
return NULL;
}
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
if(data->xrender_available == SDL_TRUE) {
data->pixmap_picts[i] =
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XRenderCreatePicture(data->display, data->pixmaps[i], data->xwindow_pict_fmt,
data->xwindow_pict_attr_valuemask, &data->xwindow_pict_attr);
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if(!data->pixmap_picts[i]) {
data->xrender_available = SDL_FALSE;
}
}
#endif
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}
if (n > 0) {
data->drawable = data->pixmaps[0];
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
if(data->xrender_available == SDL_TRUE)
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data->drawable_pict = data->pixmap_picts[0];
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#endif
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data->makedirty = SDL_TRUE;
} else {
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data->drawable = data->xwindow;
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
if(data->xrender_available == SDL_TRUE)
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data->drawable_pict = data->xwindow_pict;
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#endif
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data->makedirty = SDL_FALSE;
}
data->current_pixmap = 0;
/* Get the format of the window */
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if (!SDL_PixelFormatEnumToMasks
(display->current_mode.format, &bpp, &Rmask, &Gmask, &Bmask,
&Amask)) {
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SDL_SetError("Unknown display format");
X11_DestroyRenderer(renderer);
return NULL;
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}
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SDL_InitFormat(&data->format, bpp, Rmask, Gmask, Bmask, Amask);
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/* Create the drawing context */
gcv.graphics_exposures = False;
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data->gc =
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XCreateGC(data->display, data->xwindow, GCGraphicsExposures, &gcv);
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if (!data->gc) {
X11_DestroyRenderer(renderer);
SDL_SetError("XCreateGC() failed");
return NULL;
}
return renderer;
}
static int
X11_DisplayModeChanged(SDL_Renderer * renderer)
{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
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SDL_Window *window = renderer->window;
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int i, n;
if (renderer->info.flags & SDL_RENDERER_SINGLEBUFFER) {
n = 0;
} else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP2) {
n = 2;
} else if (renderer->info.flags & SDL_RENDERER_PRESENTFLIP3) {
n = 3;
} else {
n = 1;
}
for (i = 0; i < n; ++i) {
if (data->pixmaps[i] != None) {
XFreePixmap(data->display, data->pixmaps[i]);
data->pixmaps[i] = None;
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
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data->pixmap_picts[i] = None;
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#endif
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}
}
for (i = 0; i < n; ++i) {
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data->pixmaps[i] =
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XCreatePixmap(data->display, data->xwindow, window->w, window->h,
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data->depth);
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if (data->pixmaps[i] == None) {
SDL_SetError("XCreatePixmap() failed");
return -1;
}
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
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if(data->xrender_available == SDL_TRUE) {
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data->pixmap_picts[i] =
XRenderCreatePicture(data->display, data->pixmaps[i], data->xwindow_pict_fmt,
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data->xwindow_pict_attr_valuemask, &data->xwindow_pict_attr);
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if(!data->pixmap_picts[i]) {
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data->xrender_available = SDL_FALSE;
}
}
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#endif
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}
if (n > 0) {
data->drawable = data->pixmaps[0];
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
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data->drawable_pict = data->pixmap_picts[0];
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#endif
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}
data->current_pixmap = 0;
return 0;
}
static int
X11_CreateTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
X11_RenderData *renderdata = (X11_RenderData *) renderer->driverdata;
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SDL_Window *window = renderer->window;
SDL_VideoDisplay *display = window->display;
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X11_TextureData *data;
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int pitch_alignmask = ((renderdata->scanline_pad / 8) - 1);
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data = (X11_TextureData *) SDL_calloc(1, sizeof(*data));
if (!data) {
SDL_OutOfMemory();
return -1;
}
texture->driverdata = data;
if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
data->yuv =
SDL_SW_CreateYUVTexture(texture->format, texture->w, texture->h);
if (!data->yuv) {
return -1;
}
data->format = display->current_mode.format;
} else {
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/* If Xrender support is builtin we only need to check whether
Xrender is available at runtime. If it is available there
can be no BadMatch error since Xrender takes care of that.
*/
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
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// Assume the texture is supported by Xrender
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data->xrender_available = SDL_TRUE;
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if(renderdata->xrender_available == SDL_FALSE) {
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if (texture->format != display->current_mode.format) {
SDL_SetError("Texture format doesn't match window format");
return -1;
}
}
#else
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/* The image/pixmap depth must be the same as the window or you
get a BadMatch error when trying to putimage or copyarea.
This BadMatch error
*/
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if (texture->format != display->current_mode.format) {
SDL_SetError("Texture format doesn't match window format");
return -1;
}
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#endif
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data->format = texture->format;
}
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data->pitch = texture->w * SDL_BYTESPERPIXEL(data->format);
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data->pitch = (data->pitch + pitch_alignmask) & ~pitch_alignmask;
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if (data->yuv || texture->access == SDL_TEXTUREACCESS_STREAMING) {
#ifndef NO_SHARED_MEMORY
XShmSegmentInfo *shminfo = &data->shminfo;
shm_error = True;
if (SDL_X11_HAVE_SHM) {
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shminfo->shmid =
shmget(IPC_PRIVATE, texture->h * data->pitch,
IPC_CREAT | 0777);
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if (shminfo->shmid >= 0) {
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shminfo->shmaddr = (char *) shmat(shminfo->shmid, 0, 0);
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shminfo->readOnly = False;
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if (shminfo->shmaddr != (char *) -1) {
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shm_error = False;
X_handler = XSetErrorHandler(shm_errhandler);
XShmAttach(renderdata->display, shminfo);
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XSync(renderdata->display, False);
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XSetErrorHandler(X_handler);
if (shm_error) {
shmdt(shminfo->shmaddr);
}
}
shmctl(shminfo->shmid, IPC_RMID, NULL);
}
}
if (!shm_error) {
data->pixels = shminfo->shmaddr;
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data->image =
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XShmCreateImage(renderdata->display, renderdata->visual,
renderdata->depth, ZPixmap, shminfo->shmaddr,
shminfo, texture->w, texture->h);
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if (!data->image) {
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XShmDetach(renderdata->display, shminfo);
XSync(renderdata->display, False);
shmdt(shminfo->shmaddr);
shm_error = True;
}
}
if (shm_error) {
shminfo->shmaddr = NULL;
}
if (!data->image)
#endif /* not NO_SHARED_MEMORY */
{
data->pixels = SDL_malloc(texture->h * data->pitch);
if (!data->pixels) {
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X11_DestroyTexture(renderer, texture);
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SDL_OutOfMemory();
return -1;
}
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data->image =
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XCreateImage(renderdata->display, renderdata->visual,
renderdata->depth, ZPixmap, 0, data->pixels,
texture->w, texture->h,
SDL_BYTESPERPIXEL(data->format) * 8,
data->pitch);
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if (!data->image) {
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X11_DestroyTexture(renderer, texture);
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SDL_SetError("XCreateImage() failed");
return -1;
}
}
} else {
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data->pixmap =
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XCreatePixmap(renderdata->display, renderdata->xwindow, texture->w,
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texture->h, renderdata->depth);
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if (data->pixmap == None) {
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X11_DestroyTexture(renderer, texture);
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SDL_SetError("XCreatePixmap() failed");
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return -1;
}
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#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
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if(renderdata->xrender_available) {
data->xrender_available = SDL_TRUE;
unsigned long x11_fmt_mask; // Format mask
XRenderPictFormat x11_templ_fmt; // Format template
x11_fmt_mask =
(PictFormatDepth | PictFormatRedMask | PictFormatGreenMask
| PictFormatBlueMask);
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Uint32 Rmask, Gmask, Bmask, Amask;
int bpp;
SDL_PixelFormatEnumToMasks(data->format, &bpp, &Rmask, &Gmask, &Bmask, &Amask);
x11_templ_fmt.depth = bpp;
x11_templ_fmt.direct.redMask = Rmask;
x11_templ_fmt.direct.greenMask = Gmask;
x11_templ_fmt.direct.blueMask = Bmask;
x11_templ_fmt.direct.alphaMask = Amask;
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/* Return one matching XRenderPictFormat */
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data->picture_fmt =
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XRenderFindFormat(renderdata->display, x11_fmt_mask, &x11_templ_fmt, 1);
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if(!data->picture_fmt) {
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data->xrender_available = SDL_FALSE;
}
data->picture_attr_valuemask = CPGraphicsExposure;
(data->picture_attr).graphics_exposures = False;
data->picture =
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XRenderCreatePicture(renderdata->display, data->pixmap, data->picture_fmt,
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data->picture_attr_valuemask, &(data->picture_attr));
if(!data->picture) {
data->xrender_available = SDL_FALSE;
}
}
/* We thought we could render the texture with Xrender but this was
not possible for some reason. Now we must ensure that texture
format and window format match to avoid a BadMatch error.
*/
if(data->xrender_available == SDL_FALSE) {
if (texture->format != display->current_mode.format) {
SDL_SetError("Texture format doesn't match window format");
return -1;
}
}
#endif
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data->image =
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XCreateImage(renderdata->display, renderdata->visual,
renderdata->depth, ZPixmap, 0, NULL, texture->w,
texture->h, SDL_BYTESPERPIXEL(data->format) * 8,
data->pitch);
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if (!data->image) {
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X11_DestroyTexture(renderer, texture);
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SDL_SetError("XCreateImage() failed");
return -1;
}
}
return 0;
}
static int
X11_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
void **pixels, int *pitch)
{
X11_TextureData *data = (X11_TextureData *) texture->driverdata;
if (data->yuv) {
return SDL_SW_QueryYUVTexturePixels(data->yuv, pixels, pitch);
} else {
*pixels = data->pixels;
*pitch = data->pitch;
return 0;
}
}
static int
X11_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
switch (texture->blendMode) {
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case SDL_BLENDMODE_NONE:
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return 0;
default:
SDL_Unsupported();
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texture->blendMode = SDL_BLENDMODE_NONE;
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return -1;
}
}
static int
X11_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
{
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X11_TextureData *data = (X11_TextureData *) texture->driverdata;
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switch (texture->scaleMode) {
case SDL_TEXTURESCALEMODE_NONE:
return 0;
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case SDL_TEXTURESCALEMODE_FAST:
/* We can sort of fake it for streaming textures */
if (data->yuv || texture->access == SDL_TEXTUREACCESS_STREAMING) {
return 0;
}
/* Fall through to unsupported case */
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default:
SDL_Unsupported();
texture->scaleMode = SDL_TEXTURESCALEMODE_NONE;
return -1;
}
return 0;
}
static int
X11_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, const void *pixels, int pitch)
{
X11_TextureData *data = (X11_TextureData *) texture->driverdata;
if (data->yuv) {
if (SDL_SW_UpdateYUVTexture(data->yuv, rect, pixels, pitch) < 0) {
return -1;
}
UpdateYUVTextureData(texture);
return 0;
} else {
X11_RenderData *renderdata = (X11_RenderData *) renderer->driverdata;
if (data->pixels) {
Uint8 *src, *dst;
int row;
size_t length;
src = (Uint8 *) pixels;
dst =
(Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format);
length = rect->w * SDL_BYTESPERPIXEL(texture->format);
for (row = 0; row < rect->h; ++row) {
SDL_memcpy(dst, src, length);
src += pitch;
dst += data->pitch;
}
} else {
data->image->width = rect->w;
data->image->height = rect->h;
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data->image->data = (char *) pixels;
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data->image->bytes_per_line = pitch;
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XPutImage(renderdata->display, data->pixmap, renderdata->gc,
data->image, 0, 0, rect->x, rect->y, rect->w, rect->h);
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}
return 0;
}
}
static int
X11_LockTexture(SDL_Renderer * renderer, SDL_Texture * texture,
const SDL_Rect * rect, int markDirty, void **pixels,
int *pitch)
{
X11_TextureData *data = (X11_TextureData *) texture->driverdata;
if (data->yuv) {
return SDL_SW_LockYUVTexture(data->yuv, rect, markDirty, pixels,
pitch);
} else if (data->pixels) {
*pixels =
(void *) ((Uint8 *) data->pixels + rect->y * data->pitch +
rect->x * SDL_BYTESPERPIXEL(texture->format));
*pitch = data->pitch;
return 0;
} else {
SDL_SetError("No pixels available");
return -1;
}
}
static void
X11_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
{
X11_TextureData *data = (X11_TextureData *) texture->driverdata;
if (data->yuv) {
SDL_SW_UnlockYUVTexture(data->yuv);
UpdateYUVTextureData(texture);
}
}
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static int
X11_SetDrawBlendMode(SDL_Renderer * renderer)
{
switch (renderer->blendMode) {
case SDL_BLENDMODE_NONE:
return 0;
default:
SDL_Unsupported();
renderer->blendMode = SDL_BLENDMODE_NONE;
return -1;
}
}
static Uint32
renderdrawcolor(SDL_Renderer * renderer, int premult)
{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
Uint8 r = renderer->r;
Uint8 g = renderer->g;
Uint8 b = renderer->b;
Uint8 a = renderer->a;
if (premult)
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return SDL_MapRGBA(&data->format, ((int) r * (int) a) / 255,
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((int) g * (int) a) / 255,
((int) b * (int) a) / 255, 255);
else
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return SDL_MapRGBA(&data->format, r, g, b, a);
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}
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static int
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X11_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points,
int count)
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{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
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SDL_Window *window = renderer->window;
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unsigned long foreground;
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XPoint *xpoints, *xpoint;
int i, xcount;
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if (data->makedirty) {
SDL_Rect rect;
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/* Get the smallest rectangle that contains everything */
rect.x = 0;
rect.y = 0;
rect.w = window->w;
rect.h = window->h;
if (!SDL_EnclosePoints(points, count, &rect, &rect)) {
/* Nothing to draw */
return 0;
}
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SDL_AddDirtyRect(&data->dirty, &rect);
}
foreground = renderdrawcolor(renderer, 1);
XSetForeground(data->display, data->gc, foreground);
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xpoint = xpoints = SDL_stack_alloc(XPoint, count);
xcount = 0;
for (i = 0; i < count; ++i) {
int x = points[i].x;
int y = points[i].y;
if (x < 0 || x >= window->w || y < 0 || y >= window->h) {
continue;
}
xpoint->x = (short)x;
xpoint->y = (short)y;
++xpoint;
++xcount;
}
if (xcount > 0) {
XDrawPoints(data->display, data->drawable, data->gc, xpoints, xcount,
CoordModeOrigin);
}
SDL_stack_free(xpoints);
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return 0;
}
779
static int
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X11_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points,
int count)
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783
{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
784
SDL_Window *window = renderer->window;
785
SDL_Rect clip;
786
unsigned long foreground;
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XPoint *xpoints, *xpoint;
int i, xcount;
int minx, miny;
int maxx, maxy;
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clip.x = 0;
clip.y = 0;
clip.w = window->w;
clip.h = window->h;
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foreground = renderdrawcolor(renderer, 1);
XSetForeground(data->display, data->gc, foreground);
xpoint = xpoints = SDL_stack_alloc(XPoint, count);
xcount = 0;
minx = INT_MAX;
miny = INT_MAX;
maxx = INT_MIN;
maxy = INT_MIN;
for (i = 0; i < count; ++i) {
int x = points[i].x;
int y = points[i].y;
/* If the point is inside the window, add it to the list */
if (x >= 0 && x < window->w && y >= 0 && y < window->h) {
if (x < minx) {
minx = x;
} else if (x > maxx) {
maxx = x;
}
if (y < miny) {
miny = y;
} else if (y > maxy) {
maxy = y;
}
xpoint->x = (short)x;
xpoint->y = (short)y;
++xpoint;
++xcount;
continue;
}
/* We need to clip the line segments joined by this point */
if (xcount > 0) {
int x1 = xpoint[-1].x;
int y1 = xpoint[-1].y;
int x2 = x;
int y2 = y;
if (SDL_IntersectRectAndLine(&clip, &x1, &y1, &x2, &y2)) {
if (x2 < minx) {
minx = x2;
} else if (x2 > maxx) {
maxx = x2;
}
if (y2 < miny) {
miny = y2;
} else if (y2 > maxy) {
maxy = y2;
}
xpoint->x = (short)x2;
xpoint->y = (short)y2;
++xpoint;
++xcount;
}
XDrawLines(data->display, data->drawable, data->gc,
xpoints, xcount, CoordModeOrigin);
if (xpoints[0].x != x2 || xpoints[0].y != y2) {
XDrawPoint(data->display, data->drawable, data->gc, x2, y2);
}
if (data->makedirty) {
SDL_Rect rect;
rect.x = minx;
rect.y = miny;
rect.w = (maxx - minx) + 1;
rect.h = (maxy - miny) + 1;
SDL_AddDirtyRect(&data->dirty, &rect);
}
xpoint = xpoints;
xcount = 0;
minx = INT_MAX;
miny = INT_MAX;
maxx = INT_MIN;
maxy = INT_MIN;
}
if (i < (count-1)) {
int x1 = x;
int y1 = y;
int x2 = points[i+1].x;
int y2 = points[i+1].y;
if (SDL_IntersectRectAndLine(&clip, &x1, &y1, &x2, &y2)) {
if (x1 < minx) {
minx = x1;
} else if (x1 > maxx) {
maxx = x1;
}
if (y1 < miny) {
miny = y1;
} else if (y1 > maxy) {
maxy = y1;
}
xpoint->x = (short)x1;
xpoint->y = (short)y1;
++xpoint;
++xcount;
}
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894
}
}
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913
if (xcount > 1) {
int x2 = xpoint[-1].x;
int y2 = xpoint[-1].y;
XDrawLines(data->display, data->drawable, data->gc, xpoints, xcount,
CoordModeOrigin);
if (xpoints[0].x != x2 || xpoints[0].y != y2) {
XDrawPoint(data->display, data->drawable, data->gc, x2, y2);
}
if (data->makedirty) {
SDL_Rect rect;
rect.x = minx;
rect.y = miny;
rect.w = (maxx - minx) + 1;
rect.h = (maxy - miny) + 1;
SDL_AddDirtyRect(&data->dirty, &rect);
}
}
SDL_stack_free(xpoints);
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915
return 0;
916
917
918
}
static int
919
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921
X11_RenderDrawRects(SDL_Renderer * renderer, const SDL_Rect ** rects, int count)
{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
922
SDL_Window *window = renderer->window;
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927
928
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930
931
932
933
934
935
936
937
938
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940
941
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943
944
945
946
947
948
949
950
951
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955
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960
961
962
963
964
SDL_Rect clip, rect;
unsigned long foreground;
XRectangle *xrects, *xrect;
int i, xcount;
clip.x = 0;
clip.y = 0;
clip.w = window->w;
clip.h = window->h;
foreground = renderdrawcolor(renderer, 1);
XSetForeground(data->display, data->gc, foreground);
xrect = xrects = SDL_stack_alloc(XRectangle, count);
xcount = 0;
for (i = 0; i < count; ++i) {
if (!SDL_IntersectRect(rects[i], &clip, &rect)) {
continue;
}
xrect->x = (short)rect.x;
xrect->y = (short)rect.y;
xrect->width = (unsigned short)rect.w;
xrect->height = (unsigned short)rect.h;
++xrect;
++xcount;
if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, &rect);
}
}
if (xcount > 0) {
XDrawRectangles(data->display, data->drawable, data->gc,
xrects, xcount);
}
SDL_stack_free(xpoints);
return 0;
}
static int
X11_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects, int count)
965
966
{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
967
SDL_Window *window = renderer->window;
968
SDL_Rect clip, rect;
969
unsigned long foreground;
970
971
XRectangle *xrects, *xrect;
int i, xcount;
972
973
974
975
976
clip.x = 0;
clip.y = 0;
clip.w = window->w;
clip.h = window->h;
977
978
foreground = renderdrawcolor(renderer, 1);
979
XSetForeground(data->display, data->gc, foreground);
980
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982
983
984
985
986
987
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989
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993
994
995
996
997
998
999
xrect = xrects = SDL_stack_alloc(XRectangle, count);
xcount = 0;
for (i = 0; i < count; ++i) {
if (!SDL_IntersectRect(rects[i], &clip, &rect)) {
continue;
}
xrect->x = (short)rect.x;
xrect->y = (short)rect.y;
xrect->width = (unsigned short)rect.w;
xrect->height = (unsigned short)rect.h;
++xrect;
++xcount;
if (data->makedirty) {
SDL_AddDirtyRect(&data->dirty, &rect);
}
}
if (xcount > 0) {
1000
#ifdef SDL_VIDEO_DRIVER_X11_XRENDER