src/modules/engines/software_ddraw/evas_ddraw_buffer.c

   1 #include <string.h>
   2
   3 #include "evas_common.h"
   4 #include "evas_engine.h"
   5
   6
   7 DD_Output_Buffer *
   8 evas_software_ddraw_output_buffer_new(int   depth,
   9                                       int   width,
  10                                       int   height,
  11                                       void *data)
  12 {
  13    DD_Output_Buffer *ddob;
  14
  15    ddob = calloc(1, sizeof(DD_Output_Buffer));
  16    if (!ddob) return NULL;
  17
  18    ddob->data = data;
  19    ddob->depth = depth;
  20    ddob->width = width;
  21    ddob->height = height;
  22    ddob->pitch = width * depth / 8;
  23
  24    if (!ddob->data)
  25      {
  26         ddob->data = malloc(ddob->pitch * height);
  27         if (!ddob->data)
  28           {
  29             free(ddob);
  30             return NULL;
  31           }
  32      }
  33
  34    return ddob;
  35 }
  36
  37 void
  38 evas_software_ddraw_output_buffer_free(DD_Output_Buffer *ddob)
  39 {
  40    if (ddob->data) free(ddob->data);
  41    free(ddob);
  42 }
  43
  44 void
  45 evas_software_ddraw_output_buffer_paste(DD_Output_Buffer *ddob,
  46                                         void             *ddraw_data,
  47                                         int               ddraw_width,
  48                                         int               ddraw_height,
  49                                         int               ddraw_pitch,
  50                                         int               ddraw_depth,
  51                                         int               x,
  52                                         int               y)
  53 {
  54    DATA8 *dd_data;
  55    DATA8 *evas_data;
  56    int    width;
  57    int    height;
  58    int    pitch;
  59    int    j;
  60
  61    if ((x >= ddraw_width) || (y >= ddraw_height))
  62      return;
  63
  64    /* compute the size of the data to copy on the back surface */
  65    width = ((x + ddob->width) > ddraw_width)
  66      ? ddraw_width - x
  67      : ddob->width;
  68    height = ((y + ddob->height) > ddraw_height)
  69      ? ddraw_height - y
  70      : ddob->height;
  71    pitch = width * ddob->depth / 8;
  72
  73    dd_data = (DATA8 *)ddraw_data + y * ddraw_pitch + x * ddraw_depth;
  74    evas_data = (unsigned char *)ddob->data;
  75    for (j = 0; j < height; j++, evas_data += ddob->pitch, dd_data += ddraw_pitch)
  76      memcpy(dd_data, evas_data, pitch);
  77 }
  78
  79 DATA8 *
  80 evas_software_ddraw_output_buffer_data(DD_Output_Buffer *ddob,
  81                                        int              *bytes_per_line_ret)
  82 {
  83    if (bytes_per_line_ret) *bytes_per_line_ret = ddob->pitch;
  84    return ddob->data;
  85 }
  86
  87 int
  88 evas_software_ddraw_output_buffer_depth(DD_Output_Buffer *ddob)
  89 {
  90    return ddob->depth;
  91 }