hw/display/framebuffer.h

   1 #ifndef QEMU_FRAMEBUFFER_H
   2 #define QEMU_FRAMEBUFFER_H
   3
   4 #include "exec/memory.h"
   5
   6 /* Framebuffer device helper routines.  */
   7
   8 typedef void (*drawfn)(void *, uint8_t *, const uint8_t *, int, int);
   9
  10 /* framebuffer_update_memory_section: Update framebuffer
  11  * #MemoryRegionSection, for example if the framebuffer is switched to
  12  * a different memory area.
  13  *
  14  * @mem_section: Output #MemoryRegionSection, to be passed to
  15  * framebuffer_update_display().
  16  * @root: #MemoryRegion within which the framebuffer lies
  17  * @base: Base address of the framebuffer within @root.
  18  * @rows: Height of the screen.
  19  * @src_width: Number of bytes in framebuffer memory between two rows.
  20  */
  21 void framebuffer_update_memory_section(
  22     MemoryRegionSection *mem_section,
  23     MemoryRegion *root,
  24     hwaddr base,
  25     unsigned rows,
  26     unsigned src_width);
  27
  28 /* framebuffer_update_display: Draw the framebuffer on a surface.
  29  *
  30  * @ds: #DisplaySurface to draw to.
  31  * @mem_section: #MemoryRegionSection provided by
  32  * framebuffer_update_memory_section().
  33  * @cols: Width the screen.
  34  * @rows: Height of the screen.
  35  * @src_width: Number of bytes in framebuffer memory between two rows.
  36  * @dest_row_pitch: Number of bytes in the surface data between two rows.
  37  * Negative if the framebuffer is stored in the opposite order (e.g.
  38  * bottom-to-top) compared to the framebuffer.
  39  * @dest_col_pitch: Number of bytes in the surface data between two pixels.
  40  * Negative if the framebuffer is stored in the opposite order (e.g.
  41  * right-to-left) compared to the framebuffer.
  42  * @invalidate: True if the function should redraw the whole screen
  43  * without checking the DIRTY_MEMORY_VGA dirty bitmap.
  44  * @fn: Drawing function to be called for each row that has to be drawn.
  45  * @opaque: Opaque pointer passed to @fn.
  46  * @first_row: Pointer to an integer, receives the number of the first row
  47  * that was drawn (either the first dirty row, or 0 if @invalidate is true).
  48  * @last_row: Pointer to an integer, receives the number of the last row that
  49  * was drawn (either the last dirty row, or @rows-1 if @invalidate is true).
  50  */
  51 void framebuffer_update_display(
  52     DisplaySurface *ds,
  53     MemoryRegionSection *mem_section,
  54     int cols,
  55     int rows,
  56     int src_width,
  57     int dest_row_pitch,
  58     int dest_col_pitch,
  59     int invalidate,
  60     drawfn fn,
  61     void *opaque,
  62     int *first_row,
  63     int *last_row);
  64
  65 #endif