SkBlitter.cpp File Reference

#include "src/core/SkBlitter.h"
#include "include/core/SkAlphaType.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorSpace.h"
#include "include/core/SkColorType.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPixmap.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/private/base/SkDebug.h"
#include "include/private/base/SkTemplates.h"
#include "include/private/base/SkTo.h"
#include "src/base/SkArenaAlloc.h"
#include "src/base/SkTLazy.h"
#include "src/core/SkAlphaRuns.h"
#include "src/core/SkBlendModePriv.h"
#include "src/core/SkBlitter_A8.h"
#include "src/core/SkCoreBlitters.h"
#include "src/core/SkMask.h"
#include "src/core/SkMaskFilterBase.h"
#include "src/core/SkMemset.h"
#include "src/core/SkPaintPriv.h"
#include "src/core/SkRegionPriv.h"
#include "src/shaders/SkShaderBase.h"
#include <cstddef>
#include <functional>
#include <optional>

Go to the source code of this file.

Functions
static SkAlpha	ScalarToAlpha (SkScalar a)
static void	bits_to_runs (SkBlitter *blitter, int x, int y, const uint8_t bits[], uint8_t left_mask, ptrdiff_t rowBytes, uint8_t right_mask)
static uint8_t	generate_right_mask (int maskBitCount)
static int	compute_anti_width (const int16_t runs[])
static bool	y_in_rect (int y, const SkIRect &rect)
static bool	x_in_rect (int x, const SkIRect &rect)

Variables
bool	gSkForceRasterPipelineBlitter {false}

Function Documentation

bits_to_runs()

static void bits_to_runs ( SkBlitter *  blitter, int  x, int  y, const uint8_t  bits[], uint8_t  left_mask, ptrdiff_t  rowBytes, uint8_t  right_mask  )

inlinestatic

Definition at line 160 of file SkBlitter.cpp.

                                                    {
    int inFill = 0;
    int pos = 0;
 
    while (--rowBytes >= 0) {
        uint8_t b = *bits++ & left_mask;
        if (rowBytes == 0) {
            b &= right_mask;
        }
 
        for (uint8_t test = 0x80U; test != 0; test >>= 1) {
            if (b & test) {
                if (!inFill) {
                    pos = x;
                    inFill = true;
                }
            } else {
                if (inFill) {
                    blitter->blitH(pos, y, x - pos);
                    inFill = false;
                }
            }
            x += 1;
        }
        left_mask = 0xFFU;
    }
 
    // final cleanup
    if (inFill) {
        blitter->blitH(pos, y, x - pos);
    }
}

compute_anti_width()

static int compute_anti_width ( const int16_t  runs[] )

static

Definition at line 333 of file SkBlitter.cpp.

                                                    {
    int width = 0;
 
    for (;;) {
        int count = runs[0];
 
        SkASSERT(count >= 0);
        if (count == 0) {
            break;
        }
        width += count;
        runs += count;
    }
    return width;
}

generate_right_mask()

static uint8_t generate_right_mask ( int  maskBitCount )

static

Definition at line 197 of file SkBlitter.cpp.

                                                     {
    return static_cast<uint8_t>((0xFF00U >> maskBitCount) & 0xFF);
}

ScalarToAlpha()

static SkAlpha ScalarToAlpha ( SkScalar  a )

inlinestatic

Definition at line 62 of file SkBlitter.cpp.

                                                {
    SkAlpha alpha = (SkAlpha)(a * 255);
    return alpha > 247 ? 0xFF : alpha < 8 ? 0 : alpha;
}

x_in_rect()

static bool x_in_rect ( int  x, const SkIRect &  rect  )

inlinestatic

Definition at line 353 of file SkBlitter.cpp.

                                                         {
    return (unsigned)(x - rect.fLeft) < (unsigned)rect.width();
}

y_in_rect()

static bool y_in_rect ( int  y, const SkIRect &  rect  )

inlinestatic

Definition at line 349 of file SkBlitter.cpp.

                                                         {
    return (unsigned)(y - rect.fTop) < (unsigned)rect.height();
}

Variable Documentation

gSkForceRasterPipelineBlitter

bool gSkForceRasterPipelineBlitter {false}

Definition at line 44 of file SkBlitter.cpp.