#endif // FANCY_UPSAMPLING
//------------------------------------------------------------------------------
-// simple point-sampling
-
-#define SAMPLE_FUNC(FUNC_NAME, FUNC, XSTEP) \
-static void FUNC_NAME(const uint8_t* top_y, const uint8_t* bottom_y, \
- const uint8_t* u, const uint8_t* v, \
- uint8_t* top_dst, uint8_t* bottom_dst, int len) { \
- int i; \
- for (i = 0; i < len - 1; i += 2) { \
- FUNC(top_y[0], u[0], v[0], top_dst); \
- FUNC(top_y[1], u[0], v[0], top_dst + XSTEP); \
- FUNC(bottom_y[0], u[0], v[0], bottom_dst); \
- FUNC(bottom_y[1], u[0], v[0], bottom_dst + XSTEP); \
- top_y += 2; \
- bottom_y += 2; \
- u++; \
- v++; \
- top_dst += 2 * XSTEP; \
- bottom_dst += 2 * XSTEP; \
- } \
- if (i == len - 1) { /* last one */ \
- FUNC(top_y[0], u[0], v[0], top_dst); \
- FUNC(bottom_y[0], u[0], v[0], bottom_dst); \
- } \
-}
-
-// All variants implemented.
-SAMPLE_FUNC(SampleRgbLinePair, VP8YuvToRgb, 3)
-SAMPLE_FUNC(SampleBgrLinePair, VP8YuvToBgr, 3)
-SAMPLE_FUNC(SampleRgbaLinePair, VP8YuvToRgba, 4)
-SAMPLE_FUNC(SampleBgraLinePair, VP8YuvToBgra, 4)
-SAMPLE_FUNC(SampleArgbLinePair, VP8YuvToArgb, 4)
-SAMPLE_FUNC(SampleRgba4444LinePair, VP8YuvToRgba4444, 2)
-SAMPLE_FUNC(SampleRgb565LinePair, VP8YuvToRgb565, 2)
-
-#undef SAMPLE_FUNC
-
-const WebPSampleLinePairFunc WebPSamplers[MODE_LAST] = {
- SampleRgbLinePair, // MODE_RGB
- SampleRgbaLinePair, // MODE_RGBA
- SampleBgrLinePair, // MODE_BGR
- SampleBgraLinePair, // MODE_BGRA
- SampleArgbLinePair, // MODE_ARGB
- SampleRgba4444LinePair, // MODE_RGBA_4444
- SampleRgb565LinePair, // MODE_RGB_565
- SampleRgbaLinePair, // MODE_rgbA
- SampleBgraLinePair, // MODE_bgrA
- SampleArgbLinePair, // MODE_Argb
- SampleRgba4444LinePair // MODE_rgbA_4444
-};
-
-//------------------------------------------------------------------------------
#if !defined(FANCY_UPSAMPLING)
#define DUAL_SAMPLE_FUNC(FUNC_NAME, FUNC) \
};
//------------------------------------------------------------------------------
-// Premultiplied modes
-
-// non dithered-modes
-
-// (x * a * 32897) >> 23 is bit-wise equivalent to (int)(x * a / 255.)
-// for all 8bit x or a. For bit-wise equivalence to (int)(x * a / 255. + .5),
-// one can use instead: (x * a * 65793 + (1 << 23)) >> 24
-#if 1 // (int)(x * a / 255.)
-#define MULTIPLIER(a) ((a) * 32897UL)
-#define PREMULTIPLY(x, m) (((x) * (m)) >> 23)
-#else // (int)(x * a / 255. + .5)
-#define MULTIPLIER(a) ((a) * 65793UL)
-#define PREMULTIPLY(x, m) (((x) * (m) + (1UL << 23)) >> 24)
-#endif
-
-static void ApplyAlphaMultiply(uint8_t* rgba, int alpha_first,
- int w, int h, int stride) {
- while (h-- > 0) {
- uint8_t* const rgb = rgba + (alpha_first ? 1 : 0);
- const uint8_t* const alpha = rgba + (alpha_first ? 0 : 3);
- int i;
- for (i = 0; i < w; ++i) {
- const uint32_t a = alpha[4 * i];
- if (a != 0xff) {
- const uint32_t mult = MULTIPLIER(a);
- rgb[4 * i + 0] = PREMULTIPLY(rgb[4 * i + 0], mult);
- rgb[4 * i + 1] = PREMULTIPLY(rgb[4 * i + 1], mult);
- rgb[4 * i + 2] = PREMULTIPLY(rgb[4 * i + 2], mult);
- }
- }
- rgba += stride;
- }
-}
-#undef MULTIPLIER
-#undef PREMULTIPLY
-
-// rgbA4444
-
-#define MULTIPLIER(a) ((a) * 0x1111) // 0x1111 ~= (1 << 16) / 15
-
-static WEBP_INLINE uint8_t dither_hi(uint8_t x) {
- return (x & 0xf0) | (x >> 4);
-}
-
-static WEBP_INLINE uint8_t dither_lo(uint8_t x) {
- return (x & 0x0f) | (x << 4);
-}
-
-static WEBP_INLINE uint8_t multiply(uint8_t x, uint32_t m) {
- return (x * m) >> 16;
-}
+// Main calls
-static void ApplyAlphaMultiply4444(uint8_t* rgba4444,
- int w, int h, int stride) {
- while (h-- > 0) {
- int i;
- for (i = 0; i < w; ++i) {
- const uint8_t a = (rgba4444[2 * i + 1] & 0x0f);
- const uint32_t mult = MULTIPLIER(a);
- const uint8_t r = multiply(dither_hi(rgba4444[2 * i + 0]), mult);
- const uint8_t g = multiply(dither_lo(rgba4444[2 * i + 0]), mult);
- const uint8_t b = multiply(dither_hi(rgba4444[2 * i + 1]), mult);
- rgba4444[2 * i + 0] = (r & 0xf0) | ((g >> 4) & 0x0f);
- rgba4444[2 * i + 1] = (b & 0xf0) | a;
- }
- rgba4444 += stride;
- }
-}
-#undef MULTIPLIER
-
-void (*WebPApplyAlphaMultiply)(uint8_t*, int, int, int, int)
- = ApplyAlphaMultiply;
-void (*WebPApplyAlphaMultiply4444)(uint8_t*, int, int, int)
- = ApplyAlphaMultiply4444;
-
-//------------------------------------------------------------------------------
-// Main call
+extern void WebPInitUpsamplersSSE2(void);
+extern void WebPInitUpsamplersNEON(void);
void WebPInitUpsamplers(void) {
#ifdef FANCY_UPSAMPLING
WebPUpsamplers[MODE_ARGB] = UpsampleArgbLinePair;
WebPUpsamplers[MODE_RGBA_4444] = UpsampleRgba4444LinePair;
WebPUpsamplers[MODE_RGB_565] = UpsampleRgb565LinePair;
-
- // If defined, use CPUInfo() to overwrite some pointers with faster versions.
- if (VP8GetCPUInfo != NULL) {
-#if defined(WEBP_USE_SSE2)
- if (VP8GetCPUInfo(kSSE2)) {
- WebPInitUpsamplersSSE2();
- }
-#endif
-#if defined(WEBP_USE_NEON)
- if (VP8GetCPUInfo(kNEON)) {
- WebPInitUpsamplersNEON();
- }
-#endif
- }
-#endif // FANCY_UPSAMPLING
-}
-
-void WebPInitPremultiply(void) {
- WebPApplyAlphaMultiply = ApplyAlphaMultiply;
- WebPApplyAlphaMultiply4444 = ApplyAlphaMultiply4444;
-
-#ifdef FANCY_UPSAMPLING
WebPUpsamplers[MODE_rgbA] = UpsampleRgbaLinePair;
WebPUpsamplers[MODE_bgrA] = UpsampleBgraLinePair;
WebPUpsamplers[MODE_Argb] = UpsampleArgbLinePair;
WebPUpsamplers[MODE_rgbA_4444] = UpsampleRgba4444LinePair;
+ // If defined, use CPUInfo() to overwrite some pointers with faster versions.
if (VP8GetCPUInfo != NULL) {
#if defined(WEBP_USE_SSE2)
if (VP8GetCPUInfo(kSSE2)) {
- WebPInitPremultiplySSE2();
+ WebPInitUpsamplersSSE2();
}
#endif
#if defined(WEBP_USE_NEON)
if (VP8GetCPUInfo(kNEON)) {
- WebPInitPremultiplyNEON();
+ WebPInitUpsamplersNEON();
}
#endif
}
#endif // FANCY_UPSAMPLING
}
+//------------------------------------------------------------------------------
projects / platform / framework / web / crosswalk.git / blobdiff