shadow_surface.c

 
#include <freerdp/config.h>
 
#include "shadow.h"
 
#include "shadow_surface.h"
#define ALIGN_SCREEN_SIZE(size, align) \
  ((((size) % (align)) != 0) ? ((size) + (align) - ((size) % (align))) : (size))
 
rdpShadowSurface* shadow_surface_new(rdpShadowServer* server, UINT16 x, UINT16 y, UINT32 width,
                                     UINT32 height)
{
  rdpShadowSurface* surface = NULL;
  surface = (rdpShadowSurface*)calloc(1, sizeof(rdpShadowSurface));
 
  if (!surface)
    return NULL;
 
  surface->server = server;
  surface->x = x;
  surface->y = y;
  surface->width = width;
  surface->height = height;
  surface->scanline = ALIGN_SCREEN_SIZE(surface->width, 32) * 4;
  surface->format = PIXEL_FORMAT_BGRX32;
  surface->data = (BYTE*)calloc(ALIGN_SCREEN_SIZE(surface->height, 32), surface->scanline);
 
  if (!surface->data)
  {
    free(surface);
    return NULL;
  }
 
  if (!InitializeCriticalSectionAndSpinCount(&(surface->lock), 4000))
  {
    free(surface->data);
    free(surface);
    return NULL;
  }
 
  region16_init(&(surface->invalidRegion));
  return surface;
}
 
void shadow_surface_free(rdpShadowSurface* surface)
{
  if (!surface)
    return;
 
  free(surface->data);
  DeleteCriticalSection(&(surface->lock));
  region16_uninit(&(surface->invalidRegion));
  free(surface);
}
 
BOOL shadow_surface_resize(rdpShadowSurface* surface, UINT16 x, UINT16 y, UINT32 width,
                           UINT32 height)
{
  BYTE* buffer = NULL;
  UINT32 scanline = ALIGN_SCREEN_SIZE(width, 4) * 4;
 
  if (!surface)
    return FALSE;
 
  if ((width == surface->width) && (height == surface->height))
  {
    /* We don't need to reset frame buffer, just update left top */
    surface->x = x;
    surface->y = y;
    return TRUE;
  }
 
  buffer = (BYTE*)realloc(surface->data, 1ull * scanline * ALIGN_SCREEN_SIZE(height, 4ull));
 
  if (buffer)
  {
    surface->x = x;
    surface->y = y;
    surface->width = width;
    surface->height = height;
    surface->scanline = scanline;
    surface->data = buffer;
    return TRUE;
  }
 
  return FALSE;
}