diff options
Diffstat (limited to 'src/base/framebuffer.hh')
| -rw-r--r-- | src/base/framebuffer.hh | 179 |
1 files changed, 1 insertions, 178 deletions
diff --git a/src/base/framebuffer.hh b/src/base/framebuffer.hh index fbeafb467..ae2e15c3c 100644 --- a/src/base/framebuffer.hh +++ b/src/base/framebuffer.hh @@ -48,189 +48,12 @@ #include "base/compiler.hh" #include "base/cprintf.hh" +#include "base/pixel.hh" #include "base/str.hh" #include "base/types.hh" #include "sim/serialize.hh" /** - * Internal gem5 representation of a Pixel. - */ -struct Pixel -{ - Pixel() - : red(0), green(0), blue(0), padding(0) {} - - Pixel(uint8_t _red, uint8_t _green, uint8_t _blue) - : red(_red), green(_green), blue(_blue), padding(0) {} - - uint8_t red; - uint8_t green; - uint8_t blue; - uint8_t padding; -}; - -inline bool -operator==(const Pixel &lhs, const Pixel &rhs) -{ - return lhs.red == rhs.red && - lhs.green == rhs.green && - lhs.blue == rhs.blue && - lhs.padding == rhs.padding; -} - -/** - * Configurable RGB pixel converter. - * - * This class converts between external RGB representations and gem5's - * internal Pixel representation. The class assumes that pixels are - * stored in a word of configurable length (up to 32 bits). Individual - * pixels are assumed to be represented by contiguous bit ranges in - * the word (i.e., it is possible to shift and mask out a contiguous - * bit range for each pixel). - */ -class PixelConverter -{ - public: - /** - * Color channel conversion and scaling helper class. - */ - struct Channel { - /** - * @param offset Offset in bits. - * @param width Width in bits. - */ - Channel(unsigned offset, unsigned width); - - /** - * Get the value of a single color channel represented as an - * 8-bit number. - */ - uint8_t toPixel(uint32_t word) const { - return round(((word >> offset) & mask) * factor); - } - - /** - * Convert an 8-bit representation of a color into an external - * format. - */ - uint32_t fromPixel(uint8_t ch) const { - return (static_cast<uint8_t>(round(ch / factor)) & mask) << offset; - } - - /** Offset in bits */ - unsigned offset; - /** Bit mask (after shifting) */ - unsigned mask; - /** - * Scaling factor when converting to the full range of an - * 8-bit color channel - */ - float factor; - }; - - PixelConverter(unsigned length, - unsigned ro, unsigned go, unsigned bo, - unsigned rw, unsigned gw, unsigned bw, - ByteOrder byte_order = LittleEndianByteOrder); - - /** Get the Pixel representation of a color word. */ - Pixel toPixel(uint32_t word) const { - return Pixel(ch_r.toPixel(word), - ch_g.toPixel(word), - ch_b.toPixel(word)); - } - - /** Get a Pixel representation by reading a word from memory. */ - Pixel toPixel(const uint8_t *rfb) const { - return toPixel(readWord(rfb)); - } - - /** Convert a Pixel into a color word */ - uint32_t fromPixel(const Pixel &pixel) const { - return ch_r.fromPixel(pixel.red) | - ch_g.fromPixel(pixel.green) | - ch_b.fromPixel(pixel.blue); - } - - /** - * Convert a pixel into a color word and store the resulting word - * in memory. - */ - void fromPixel(uint8_t *rfb, const Pixel &pixel) const { - writeWord(rfb, fromPixel(pixel)); - } - - /** - * Read a word of a given length and endianness from memory. - * - * The number of bytes read from memory is determined by the - * length of a color word. Note that some of the bytes may be - * padding. - * - * @param p Pointer to the first byte in the word. - * @return Word in host endianness. - */ - uint32_t readWord(const uint8_t *p) const; - /** - * Write a word of a given length and endianness to memory. - * - * @param p Pointer to the first byte in memory. - * @param word Word to store (host endianness). - */ - void writeWord(uint8_t *p, uint32_t word) const; - - /** Bytes per pixel when stored in memory (including padding) */ - unsigned length; - /** - * Number of bits used to represent one pixel value (excluding - * padding). This could be less than length * 8 if the pixel value - * is padded. - */ - unsigned depth; - /** Byte order when stored to memory. */ - ByteOrder byte_order; - - /** Red channel conversion helper */ - Channel ch_r; - /** Green channel conversion helper */ - Channel ch_g; - /** Blue channel conversion helper */ - Channel ch_b; - - /** Predefined 32-bit RGB (red in least significant bits, 8 - * bits/channel, little endian) conversion helper */ - static const PixelConverter rgba8888_le; - /** Predefined 16-bit RGB565 (red in least significant bits, - * little endian) conversion helper */ - static const PixelConverter rgb565_le; - - /** Predefined 32-bit RGB (red in least significant bits, 8 - * bits/channel, big endian) conversion helper */ - static const PixelConverter rgba8888_be; - /** Predefined 16-bit RGB565 (red in least significant bits, - * big endian) conversion helper */ - static const PixelConverter rgb565_be; -}; - -inline bool -to_number(const std::string &value, Pixel &retval) -{ - uint32_t num; - if (!to_number(value, num)) - return false; - - retval = PixelConverter::rgba8888_le.toPixel(num); - return true; -} - -inline std::ostream & -operator<<(std::ostream &os, const Pixel &pxl) -{ - os << csprintf("0x%.08x", PixelConverter::rgba8888_le.fromPixel(pxl)); - return os; -} - -/** * Internal gem5 representation of a frame buffer * * Display controllers and other devices producing images are expected |