grab from latest android

git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 199 insertions, 0 deletions

diff --git a/src/core/SkBitmapProcState_matrixProcs.cpp b/src/core/SkBitmapProcState_matrixProcs.cpp
new file mode 100644
index 0000000000..beb21c8ef7
--- /dev/null
+++ b/src/core/SkBitmapProcState_matrixProcs.cpp
@@ -0,0 +1,199 @@
+#include "SkBitmapProcState.h"
+#include "SkPerspIter.h"
+#include "SkShader.h"
+
+void decal_nofilter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count);
+void decal_filter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count);
+
+#ifdef SK_CPU_BENDIAN
+    #define PACK_TWO_SHORTS(pri, sec) ((pri) << 16 | (sec))
+#else
+    #define PACK_TWO_SHORTS(pri, sec) ((pri) | ((sec) << 16))
+#endif
+
+#ifdef SK_DEBUG
+    static uint32_t pack_two_shorts(U16CPU pri, U16CPU sec)
+    {
+        SkASSERT((uint16_t)pri == pri);
+        SkASSERT((uint16_t)sec == sec);
+        return PACK_TWO_SHORTS(pri, sec);
+    }
+#else
+    #define pack_two_shorts(pri, sec)   PACK_TWO_SHORTS(pri, sec)
+#endif
+
+#define MAKENAME(suffix)        ClampX_ClampY ## suffix
+#define TILEX_PROCF(fx, max)    SkClampMax((fx) >> 16, max)
+#define TILEY_PROCF(fy, max)    SkClampMax((fy) >> 16, max)
+#define TILEX_LOW_BITS(fx, max) (((fx) >> 12) & 0xF)
+#define TILEY_LOW_BITS(fy, max) (((fy) >> 12) & 0xF)
+#define CHECK_FOR_DECAL
+#include "SkBitmapProcState_matrix.h"
+
+#define MAKENAME(suffix)        RepeatX_RepeatY ## suffix
+#define TILEX_PROCF(fx, max)    (((fx) & 0xFFFF) * ((max) + 1) >> 16)
+#define TILEY_PROCF(fy, max)    (((fy) & 0xFFFF) * ((max) + 1) >> 16)
+#define TILEX_LOW_BITS(fx, max) ((((fx) & 0xFFFF) * ((max) + 1) >> 12) & 0xF)
+#define TILEY_LOW_BITS(fy, max) ((((fy) & 0xFFFF) * ((max) + 1) >> 12) & 0xF)
+#include "SkBitmapProcState_matrix.h"
+
+#define MAKENAME(suffix)        GeneralXY ## suffix
+#define PREAMBLE(state)         SkBitmapProcState::FixedTileProc tileProcX = (state).fTileProcX; \
+                                SkBitmapProcState::FixedTileProc tileProcY = (state).fTileProcY
+#define PREAMBLE_PARAM_X        , SkBitmapProcState::FixedTileProc tileProcX
+#define PREAMBLE_PARAM_Y        , SkBitmapProcState::FixedTileProc tileProcY
+#define PREAMBLE_ARG_X          , tileProcX
+#define PREAMBLE_ARG_Y          , tileProcY
+#define TILEX_PROCF(fx, max)    (tileProcX(fx) * ((max) + 1) >> 16)
+#define TILEY_PROCF(fy, max)    (tileProcY(fy) * ((max) + 1) >> 16)
+#define TILEX_LOW_BITS(fx, max) ((tileProcX(fx) * ((max) + 1) >> 12) & 0xF)
+#define TILEY_LOW_BITS(fy, max) ((tileProcY(fy) * ((max) + 1) >> 12) & 0xF)
+#include "SkBitmapProcState_matrix.h"
+
+static inline U16CPU fixed_clamp(SkFixed x)
+{
+#ifdef SK_CPU_HAS_CONDITIONAL_INSTR
+    if (x >> 16)
+        x = 0xFFFF;
+    if (x < 0)
+        x = 0;
+#else
+    if (x >> 16)
+    {
+        if (x < 0)
+            x = 0;
+        else
+            x = 0xFFFF;
+    }
+#endif
+    return x;
+}
+
+static inline U16CPU fixed_repeat(SkFixed x)
+{
+    return x & 0xFFFF;
+}
+
+static inline U16CPU fixed_mirror(SkFixed x)
+{
+    SkFixed s = x << 15 >> 31;
+    // s is FFFFFFFF if we're on an odd interval, or 0 if an even interval
+    return (x ^ s) & 0xFFFF;
+}
+
+static SkBitmapProcState::FixedTileProc choose_tile_proc(unsigned m)
+{
+    if (SkShader::kClamp_TileMode == m)
+        return fixed_clamp;
+    if (SkShader::kRepeat_TileMode == m)
+        return fixed_repeat;
+    SkASSERT(SkShader::kMirror_TileMode == m);
+    return fixed_mirror;
+}
+
+SkBitmapProcState::MatrixProc SkBitmapProcState::chooseMatrixProc()
+{
+    int index = 0;
+    if (fDoFilter)
+        index = 1;
+    if (fInvType & SkMatrix::kPerspective_Mask)
+        index |= 4;
+    else if (fInvType & SkMatrix::kAffine_Mask)
+        index |= 2;
+
+    if (SkShader::kClamp_TileMode == fTileModeX &&
+        SkShader::kClamp_TileMode == fTileModeY)
+    {
+        // clamp gets special version of filterOne
+        fFilterOneX = SK_Fixed1;
+        fFilterOneY = SK_Fixed1;
+        return ClampX_ClampY_Procs[index];
+    }
+    
+    // all remaining procs use this form for filterOne
+    fFilterOneX = SK_Fixed1 / fBitmap->width();
+    fFilterOneY = SK_Fixed1 / fBitmap->height();
+
+    if (SkShader::kRepeat_TileMode == fTileModeX &&
+        SkShader::kRepeat_TileMode == fTileModeY)
+    {
+        return RepeatX_RepeatY_Procs[index];
+    }
+
+    // only general needs these procs
+    fTileProcX = choose_tile_proc(fTileModeX);
+    fTileProcY = choose_tile_proc(fTileModeY);
+    return GeneralXY_Procs[index];
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void decal_nofilter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count)
+{
+    int i;
+
+    for (i = (count >> 2); i > 0; --i)
+    {
+        *dst++ = pack_two_shorts(fx >> 16, (fx + dx) >> 16);
+        fx += dx+dx;
+        *dst++ = pack_two_shorts(fx >> 16, (fx + dx) >> 16);
+        fx += dx+dx;
+    }
+    uint16_t* xx = (uint16_t*)dst;
+
+    for (i = (count & 3); i > 0; --i)
+    {
+        *xx++ = SkToU16(fx >> 16); fx += dx;
+    }
+}
+
+void decal_filter_scale(uint32_t dst[], SkFixed fx, SkFixed dx, int count)
+{
+    if (count & 1)
+    {
+        SkASSERT((fx >> (16 + 14)) == 0);
+        *dst++ = (fx >> 12 << 14) | ((fx >> 16) + 1);
+        fx += dx;
+    }
+    while ((count -= 2) >= 0)
+    {
+        SkASSERT((fx >> (16 + 14)) == 0);
+        *dst++ = (fx >> 12 << 14) | ((fx >> 16) + 1);
+        fx += dx;
+
+        *dst++ = (fx >> 12 << 14) | ((fx >> 16) + 1);
+        fx += dx;
+    }
+}
+
+///////////////////////////////////
+
+void repeat_nofilter_identity(uint32_t dst[], int x, int width, int count)
+{
+    if (x >= width)
+        x %= width;
+
+    int i;
+    uint16_t* xx = (uint16_t*)dst;
+
+    // do the first partial run
+    int n = width - x;
+    if (n > count)
+        n = count;
+    
+    count -= n;
+    n += x;
+    for (i = x; i < n; i++)
+        *xx++ = SkToU16(i);
+
+    // do all the full-width runs
+    while ((count -= width) >= 0)
+        for (i = 0; i < width; i++)
+            *xx++ = SkToU16(i);
+
+    // final cleanup run
+    count += width;
+    for (i = 0; i < count; i++)
+        *xx++ = SkToU16(i);
+}
+