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# ====================================================================
#
#      framebuf_synth.cdl
#
#      Framebuffer device driver for the synthetic target.
#
# ====================================================================
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# ====================================================================
######DESCRIPTIONBEGIN####
#
# Author(s):     bartv
# Date:          2005-10-24
#
#####DESCRIPTIONEND####
#========================================================================

cdl_package CYGPKG_DEVS_FRAMEBUF_SYNTH {
    display             "Synthetic Target Framebuffer device driver"
    doc                 ref/devs-framebuf-synth-ref.html
    parent              CYGPKG_IO_FRAMEBUF
    active_if           CYGPKG_IO_FRAMEBUF
    hardware
    include_files

    description "
        This package provides a framebuffer device driver for the
        synthetic target."

    for { set _fb 0 } { $_fb < 4 } { incr _fb } {
        cdl_component CYGPKG_DEVS_FRAMEBUF_SYNTH_FB$_fb {
            display     "Provide framebuffer device fb$_fb"
            description "
                The synthetic target framebuffer driver can provide up to
                four framebuffer devices, named fb0 to fb3. Each device's
                width, height, depth, and colour format can be controlled.
                This option enables device fb$_fb"

            flavor                  bool
            default_value       [expr $_fb ? 0 : 1]
            implements          CYGINT_IO_FRAMEBUF_DEVICES
            implements          CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_DOUBLE_BUFFER
            requires            is_substr(CYGDAT_IO_FRAMEBUF_DEVICES, \" fb[set _fb] \")

            cdl_option CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_WIDTH {
                display         "fb$_fb width"
                flavor          data
                default_value   320
                legal_values    16 to 4096
            }

            cdl_option CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_HEIGHT {
                display         "fb$_fb height"
                flavor          data
                default_value   240
                legal_values    16 to 4096
            }

            cdl_option CYGDAT_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_FORMAT {
                display         "fb$_fb format"
                flavor          data
                if { 0 } {
                    legal_values        { "1BPP_BE_PAL888"  "1BPP_LE_PAL888"
                        "2BPP_BE_PAL888"  "2BPP_LE_PAL888"
                        "4BPP_BE_PAL888"  "4BPP_LE_PAL888"
                        "8BPP_PAL888"     "8BPP_TRUE_332"
                        "16BPP_TRUE_565"  "16BPP_TRUE_555"
                        "32BPP_TRUE_0888"
                    }
                } else {
                    legal_values        {
                        "8BPP_PAL888"     "8BPP_TRUE_332"
                        "16BPP_TRUE_565"  "16BPP_TRUE_555"
                        "32BPP_TRUE_0888"
                    }
                }
                default_value   { "8BPP_PAL888" }
                if { 0 } {
                    description "
                        Each synthetic target framebuffer device can be configured
                        to emulate a particular format. This consists of three fields:
                        depth, endianness, and colour. The depth is in bits per pixel
                        and can be 1bpp, 2bpp, 4bpp, 8bpp, 16bpp or 32bpp. The endianness
                        is only relevant for 1bpp, 2bpp and 4bpp devices and affects how
                        pixels are organized within each byte. Colour can be either
                        paletted or true colour. 1bpp, 2bpp and 4bpp implies paletted, and
                        16bpp and 32bpp implies true colour. 8bpp can be either paletted
                        or true colour. For 1bpp the default palette is monochrome with
                        colour 0 == black. For 2bpp the default palette is greyscale with
                        colour 0 == black. For 4bpp the default palette is EGA. For 8bpp
                        the default palette is VGA. The application can change these
                        default palettes as required to match the hardware being emulated."
                } else {
                    description "
                        Each synthetic target framebuffer device can be configured
                        to emulate a particular format. This consists of two fields:
                        depth and colour. The depth is in bits per pixel and can be
                        8bpp, 16bpp or 32bpp. Colour can be either paletted or true colour.
                        16bpp and 32bpp implies true colour. 8bpp can be either paletted
                        or true colour. For 8bpp the default palette is VGA. The application
                        can change these default palettes as required to match the hardware being emulated."
                }
            }

            cdl_component CYGIMP_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_VIEWPORT {
                display             "fb$_fb provides viewport support"
                default_value   0
                implements          CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_VIEWPORT
                description "
                    Optionally framebuffer device $_fb can support a viewport.
                    In other words only a subset of the framebuffer, the viewport,
                    is actually visible on the display and application code can
                    move this viewport."

                cdl_option CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_VIEWPORT_WIDTH {
                    display                 "fb$_fb viewport width"
                    flavor                  data
                    default_value       CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_WIDTH
                    legal_values        16 to CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_WIDTH
                }

                cdl_option CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_VIEWPORT_HEIGHT {
                    display                 "fb$_fb viewport height"
                    flavor                  data
                    default_value       CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_HEIGHT
                    legal_values        16 to CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_HEIGHT
                }
            }

            cdl_option CYGNUM_DEVS_FRAMEBUF_SYNTH_FB[set _fb]_PAGE_FLIPPING {
                display             "fb$_fb supports page flipping"
                flavor              booldata
                default_value   0
                legal_values    2 3 4
                description "
                    Optionally framebuffer device $_fb can support page flipping.
                    The device supports between two and four pages, only one
                    of which is visible on the display. This allows code to
                    update one page without disturbing what is currently visible."
            }
        }

        # Eliminate any framebuffer devices that are no longer enabled.
        requires (CYGPKG_DEVS_FRAMEBUF_SYNTH_FB$_fb || !is_substr(CYGDAT_IO_FRAMEBUF_DEVICES, \" fb[set _fb] \"))
    }

    cdl_component CYGPKG_DEVS_FRAMEBUF_SYNTH_FUNCTIONALITY {
        display         "Functionality supported by the enabled framebuffer(s)"
        flavor          none
        description "
            The generic framebuffer code needs configure-time information about
            functionality of the enabled framebuffer or framebuffers. Usually
            all this information is fixed by the hardware, but the synthetic
            target framebuffer support is more flexible than real hardware. To
            cope with this some dummy options are needed."

        active_if { CYGPKG_DEVS_FRAMEBUF_SYNTH_FB0 ||
            CYGPKG_DEVS_FRAMEBUF_SYNTH_FB1 ||
            CYGPKG_DEVS_FRAMEBUF_SYNTH_FB2 ||
            CYGPKG_DEVS_FRAMEBUF_SYNTH_FB3 }
        make -priority=1 {
            <PREFIX>/include/cyg/io/framebufs/synth_fb.h :      \
                <PACKAGE>/src/gen_synthfb.tcl                   \
                <PREFIX>/include/pkgconf/devs_framebuf_synth.h
            tclsh $< $(PREFIX)
        }
        compile synthfb.c
        compile -library=libextras.a synthfb_init.cxx

        cdl_option CYGHWR_DEVS_FRAMEBUF_SYNTH_FUNCTIONALITY_32BPP {
            display     "One or more of the enabled framebuffer devices has a depth of 32bpp"
            calculated  { is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB0_FORMAT, "32BPP") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB1_FORMAT, "32BPP") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB2_FORMAT, "32BPP") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB3_FORMAT, "32BPP") }
            implements  CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_32BPP
        }
        
        cdl_option CYGHWR_DEVS_FRAMEBUF_SYNTH_FUNCTIONALITY_PALETTED {
            display     "One or more of the enabled framebuffer devices uses a paletted display"
            calculated  { is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB0_FORMAT, "PAL") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB1_FORMAT, "PAL") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB2_FORMAT, "PAL") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB3_FORMAT, "PAL") }
            implements CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_PALETTE
            implements CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_WRITEABLE_PALETTE
        }

        cdl_option CYGHWR_DEVS_FRAMEBUF_SYNTH_TRUE_COLOUR {
            display     "One or more of the enabled framebuffer devices uses a true colour display"
            calculated  { is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB0_FORMAT, "TRUE") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB1_FORMAT, "TRUE") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB2_FORMAT, "TRUE") ||
                is_substr(CYGDAT_DEVS_FRAMEBUF_SYNTH_FB3_FORMAT, "TRUE") }
            implements CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_TRUE_COLOUR
        }
    }

    cdl_component CYGPKG_DEVS_FRAMEBUF_SYNTH_OPTIONS {
        display "Framebuffer build options"
        flavor  none
        description   "
            Package specific build options including control over
            compiler flags used only in building the synthetic
            target framebuffer device driver."

        cdl_option CYGPKG_DEVS_FRAMEBUF_SYNTH_CFLAGS_ADD {
            display "Additional compiler flags"
            flavor  data
            no_define
            default_value { "" }
            description   "
                This option modifies the set of compiler flags for building
                the synthetic target framebuffer device driver. These flags
                are used in addition to the set of global flags."
        }

        cdl_option CYGPKG_DEVS_FRAMEBUF_SYNTH_CFLAGS_REMOVE {
            display "Suppressed compiler flags"
            flavor  data
            no_define
            default_value { "" }
            description   "
                This option modifies the set of compiler flags for building
                the synthetic target framebuffer device driver. These flags
                are removed from the set of global flags if present."
        }
    }
}