示例#1
0
static unsigned color_dist16(uint16_t a, uint16_t b) {
    unsigned dr = SkAbs32(SkPacked16ToR32(a) - SkPacked16ToR32(b));
    unsigned dg = SkAbs32(SkPacked16ToG32(a) - SkPacked16ToG32(b));
    unsigned db = SkAbs32(SkPacked16ToB32(a) - SkPacked16ToB32(b));
    
    return SkMax32(dr, SkMax32(dg, db));
}
示例#2
0
void SkTransparentShader::TransparentShaderContext::shadeSpan(int x, int y, SkPMColor span[],
                                                              int count) {
    unsigned scale = SkAlpha255To256(this->getPaintAlpha());

    switch (fDevice->colorType()) {
        case kN32_SkColorType:
            if (scale == 256) {
                SkPMColor* src = fDevice->getAddr32(x, y);
                if (src != span) {
                    memcpy(span, src, count * sizeof(SkPMColor));
                }
            } else {
                const SkPMColor* src = fDevice->getAddr32(x, y);
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkAlphaMulQ(src[i], scale);
                }
            }
            break;
        case kRGB_565_SkColorType: {
            const uint16_t* src = fDevice->getAddr16(x, y);
            if (scale == 256) {
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkPixel16ToPixel32(src[i]);
                }
            } else {
                unsigned alpha = this->getPaintAlpha();
                for (int i = count - 1; i >= 0; --i) {
                    uint16_t c = src[i];
                    unsigned r = SkPacked16ToR32(c);
                    unsigned g = SkPacked16ToG32(c);
                    unsigned b = SkPacked16ToB32(c);

                    span[i] = SkPackARGB32( alpha,
                                            SkAlphaMul(r, scale),
                                            SkAlphaMul(g, scale),
                                            SkAlphaMul(b, scale));
                }
            }
            break;
        }
        case kAlpha_8_SkColorType: {
            const uint8_t* src = fDevice->getAddr8(x, y);
            if (scale == 256) {
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkPackARGB32(src[i], 0, 0, 0);
                }
            } else {
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkPackARGB32(SkAlphaMul(src[i], scale), 0, 0, 0);
                }
            }
            break;
        }
        default:
            SkDEBUGFAIL("colorType not supported as a destination device");
            break;
    }
}
示例#3
0
static void ToColor_S565(SkColor dst[], const void* src, int width,
                         SkColorTable*) {
    SkASSERT(width > 0);
    const uint16_t* s = (const uint16_t*)src;
    do {
        uint16_t c = *s++;
        *dst++ =  SkColorSetRGB(SkPacked16ToR32(c), SkPacked16ToG32(c),
                                SkPacked16ToB32(c));
    } while (--width != 0);
}
示例#4
0
static void RGB_565_To_RGB(const uint8_t* in, uint8_t* rgb, int width,
                           const SkPMColor*) {
    const uint16_t* SK_RESTRICT src = (const uint16_t*)in;
    for (int i = 0; i < width; ++i) {
        const uint16_t c = *src++;
        rgb[0] = SkPacked16ToR32(c);
        rgb[1] = SkPacked16ToG32(c);
        rgb[2] = SkPacked16ToB32(c);
        rgb += 3;
    }
}
示例#5
0
void SkTransparentShader::shadeSpan(int x, int y, SkPMColor span[], int count) {
    unsigned scale = SkAlpha255To256(fAlpha);

    switch (fDevice->getConfig()) {
        case SkBitmap::kARGB_8888_Config:
            if (scale == 256) {
                SkPMColor* src = fDevice->getAddr32(x, y);
                if (src != span) {
                    memcpy(span, src, count * sizeof(SkPMColor));
                }
            } else {
                const SkPMColor* src = fDevice->getAddr32(x, y);
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkAlphaMulQ(src[i], scale);
                }
            }
            break;
        case SkBitmap::kRGB_565_Config: {
            const uint16_t* src = fDevice->getAddr16(x, y);
            if (scale == 256) {
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkPixel16ToPixel32(src[i]);
                }
            } else {
                unsigned alpha = fAlpha;
                for (int i = count - 1; i >= 0; --i) {
                    uint16_t c = src[i];
                    unsigned r = SkPacked16ToR32(c);
                    unsigned g = SkPacked16ToG32(c);
                    unsigned b = SkPacked16ToB32(c);

                    span[i] = SkPackARGB32( alpha,
                                            SkAlphaMul(r, scale),
                                            SkAlphaMul(g, scale),
                                            SkAlphaMul(b, scale));
                }
            }
            break;
        }
        case SkBitmap::kARGB_4444_Config: {
            const uint16_t* src = fDevice->getAddr16(x, y);
            if (scale == 256) {
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkPixel4444ToPixel32(src[i]);
                }
            } else {
                unsigned scale16 = scale >> 4;
                for (int i = count - 1; i >= 0; --i) {
                    uint32_t c = SkExpand_4444(src[i]) * scale16;
                    span[i] = SkCompact_8888(c);
                }
            }
            break;
        }
        case SkBitmap::kIndex8_Config:
            SkDEBUGFAIL("index8 not supported as a destination device");
            break;
        case SkBitmap::kA8_Config: {
            const uint8_t* src = fDevice->getAddr8(x, y);
            if (scale == 256) {
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkPackARGB32(src[i], 0, 0, 0);
                }
            } else {
                for (int i = count - 1; i >= 0; --i) {
                    span[i] = SkPackARGB32(SkAlphaMul(src[i], scale), 0, 0, 0);
                }
            }
            break;
        }
        case SkBitmap::kA1_Config:
            SkDEBUGFAIL("kA1_Config umimplemented at this time");
            break;
        default:    // to avoid warnings
            break;
    }
}
示例#6
0
static void bitmap_to_pdf_pixels(const SkBitmap& bitmap, SkWStream* out) {
    if (!bitmap.getPixels()) {
        size_t size = pixel_count(bitmap) *
                      pdf_color_component_count(bitmap.colorType());
        fill_stream(out, '\x00', size);
        return;
    }
    SkBitmap copy;
    const SkBitmap& bm = not4444(bitmap, &copy);
    SkAutoLockPixels autoLockPixels(bm);
    SkColorType colorType = bm.colorType();
    switch (colorType) {
        case kRGBA_8888_SkColorType:
        case kBGRA_8888_SkColorType: {
            SkASSERT(3 == pdf_color_component_count(colorType));
            SkAutoTMalloc<uint8_t> scanline(3 * bm.width());
            for (int y = 0; y < bm.height(); ++y) {
                const uint32_t* src = bm.getAddr32(0, y);
                uint8_t* dst = scanline.get();
                for (int x = 0; x < bm.width(); ++x) {
                    uint32_t color = *src++;
                    U8CPU alpha = SkGetA32Component(color, colorType);
                    if (alpha != SK_AlphaTRANSPARENT) {
                        pmcolor_to_rgb24(color, dst, colorType);
                    } else {
                        get_neighbor_avg_color(bm, x, y, dst, colorType);
                    }
                    dst += 3;
                }
                out->write(scanline.get(), 3 * bm.width());
            }
            return;
        }
        case kRGB_565_SkColorType: {
            SkASSERT(3 == pdf_color_component_count(colorType));
            SkAutoTMalloc<uint8_t> scanline(3 * bm.width());
            for (int y = 0; y < bm.height(); ++y) {
                const uint16_t* src = bm.getAddr16(0, y);
                uint8_t* dst = scanline.get();
                for (int x = 0; x < bm.width(); ++x) {
                    U16CPU color565 = *src++;
                    *dst++ = SkPacked16ToR32(color565);
                    *dst++ = SkPacked16ToG32(color565);
                    *dst++ = SkPacked16ToB32(color565);
                }
                out->write(scanline.get(), 3 * bm.width());
            }
            return;
        }
        case kAlpha_8_SkColorType:
            SkASSERT(1 == pdf_color_component_count(colorType));
            fill_stream(out, '\x00', pixel_count(bm));
            return;
        case kGray_8_SkColorType:
        case kIndex_8_SkColorType:
            SkASSERT(1 == pdf_color_component_count(colorType));
            // these two formats need no transformation to serialize.
            for (int y = 0; y < bm.height(); ++y) {
                out->write(bm.getAddr8(0, y), bm.width());
            }
            return;
        case kUnknown_SkColorType:
        case kARGB_4444_SkColorType:
        default:
            SkDEBUGFAIL("unexpected color type");
    }
}