diff options
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/i965/intel_tiled_memcpy.c | 272 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/intel_tiled_memcpy.h | 9 |
2 files changed, 281 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/intel_tiled_memcpy.c b/src/mesa/drivers/dri/i965/intel_tiled_memcpy.c index a7692a3b0eb..284374f012e 100644 --- a/src/mesa/drivers/dri/i965/intel_tiled_memcpy.c +++ b/src/mesa/drivers/dri/i965/intel_tiled_memcpy.c @@ -234,6 +234,109 @@ linear_to_ytiled(uint32_t x0, uint32_t x1, uint32_t x2, uint32_t x3, } /** + * Copy texture data from X tile layout to linear. + * + * \copydoc tile_copy_fn + */ +static inline void +xtiled_to_linear(uint32_t x0, uint32_t x1, uint32_t x2, uint32_t x3, + uint32_t y0, uint32_t y1, + char *dst, const char *src, + uint32_t dst_pitch, + uint32_t swizzle_bit, + mem_copy_fn mem_copy) +{ + /* The copy destination offset for each range copied is the sum of + * an X offset 'x0' or 'xo' and a Y offset 'yo.' + */ + uint32_t xo, yo; + + dst += y0 * dst_pitch; + + for (yo = y0 * xtile_width; yo < y1 * xtile_width; yo += xtile_width) { + /* Bits 9 and 10 of the copy destination offset control swizzling. + * Only 'yo' contributes to those bits in the total offset, + * so calculate 'swizzle' just once per row. + * Move bits 9 and 10 three and four places respectively down + * to bit 6 and xor them. + */ + uint32_t swizzle = ((yo >> 3) ^ (yo >> 4)) & swizzle_bit; + + mem_copy(dst + x0, src + ((x0 + yo) ^ swizzle), x1 - x0); + + for (xo = x1; xo < x2; xo += xtile_span) { + mem_copy(dst + xo, src + ((xo + yo) ^ swizzle), xtile_span); + } + + mem_copy(dst + x2, src + ((xo + yo) ^ swizzle), x3 - x2); + + dst += dst_pitch; + } +} + + /** + * Copy texture data from Y tile layout to linear. + * + * \copydoc tile_copy_fn + */ +static inline void +ytiled_to_linear(uint32_t x0, uint32_t x1, uint32_t x2, uint32_t x3, + uint32_t y0, uint32_t y1, + char *dst, const char *src, + uint32_t dst_pitch, + uint32_t swizzle_bit, + mem_copy_fn mem_copy) +{ + /* Y tiles consist of columns that are 'ytile_span' wide (and the same height + * as the tile). Thus the destination offset for (x,y) is the sum of: + * (x % column_width) // position within column + * (x / column_width) * bytes_per_column // column number * bytes per column + * y * column_width + * + * The copy destination offset for each range copied is the sum of + * an X offset 'xo0' or 'xo' and a Y offset 'yo.' + */ + const uint32_t column_width = ytile_span; + const uint32_t bytes_per_column = column_width * ytile_height; + + uint32_t xo0 = (x0 % ytile_span) + (x0 / ytile_span) * bytes_per_column; + uint32_t xo1 = (x1 % ytile_span) + (x1 / ytile_span) * bytes_per_column; + + /* Bit 9 of the destination offset control swizzling. + * Only the X offset contributes to bit 9 of the total offset, + * so swizzle can be calculated in advance for these X positions. + * Move bit 9 three places down to bit 6. + */ + uint32_t swizzle0 = (xo0 >> 3) & swizzle_bit; + uint32_t swizzle1 = (xo1 >> 3) & swizzle_bit; + + uint32_t x, yo; + + dst += y0 * dst_pitch; + + for (yo = y0 * column_width; yo < y1 * column_width; yo += column_width) { + uint32_t xo = xo1; + uint32_t swizzle = swizzle1; + + mem_copy(dst + x0, src + ((xo0 + yo) ^ swizzle0), x1 - x0); + + /* Step by spans/columns. As it happens, the swizzle bit flips + * at each step so we don't need to calculate it explicitly. + */ + for (x = x1; x < x2; x += ytile_span) { + mem_copy(dst + x, src + ((xo + yo) ^ swizzle), ytile_span); + xo += bytes_per_column; + swizzle ^= swizzle_bit; + } + + mem_copy(dst + x2, src + ((xo + yo) ^ swizzle), x3 - x2); + + dst += dst_pitch; + } +} + + +/** * Copy texture data from linear to X tile layout, faster. * * Same as \ref linear_to_xtiled but faster, because it passes constant @@ -305,6 +408,77 @@ linear_to_ytiled_faster(uint32_t x0, uint32_t x1, uint32_t x2, uint32_t x3, dst, src, src_pitch, swizzle_bit, mem_copy); } +/** + * Copy texture data from X tile layout to linear, faster. + * + * Same as \ref xtile_to_linear but faster, because it passes constant + * parameters for common cases, allowing the compiler to inline code + * optimized for those cases. + * + * \copydoc tile_copy_fn + */ +static FLATTEN void +xtiled_to_linear_faster(uint32_t x0, uint32_t x1, uint32_t x2, uint32_t x3, + uint32_t y0, uint32_t y1, + char *dst, const char *src, + uint32_t dst_pitch, + uint32_t swizzle_bit, + mem_copy_fn mem_copy) +{ + if (x0 == 0 && x3 == xtile_width && y0 == 0 && y1 == xtile_height) { + if (mem_copy == memcpy) + return xtiled_to_linear(0, 0, xtile_width, xtile_width, 0, xtile_height, + dst, src, dst_pitch, swizzle_bit, memcpy); + else if (mem_copy == rgba8_copy) + return xtiled_to_linear(0, 0, xtile_width, xtile_width, 0, xtile_height, + dst, src, dst_pitch, swizzle_bit, rgba8_copy); + } else { + if (mem_copy == memcpy) + return xtiled_to_linear(x0, x1, x2, x3, y0, y1, + dst, src, dst_pitch, swizzle_bit, memcpy); + else if (mem_copy == rgba8_copy) + return xtiled_to_linear(x0, x1, x2, x3, y0, y1, + dst, src, dst_pitch, swizzle_bit, rgba8_copy); + } + xtiled_to_linear(x0, x1, x2, x3, y0, y1, + dst, src, dst_pitch, swizzle_bit, mem_copy); +} + +/** + * Copy texture data from Y tile layout to linear, faster. + * + * Same as \ref ytile_to_linear but faster, because it passes constant + * parameters for common cases, allowing the compiler to inline code + * optimized for those cases. + * + * \copydoc tile_copy_fn + */ +static FLATTEN void +ytiled_to_linear_faster(uint32_t x0, uint32_t x1, uint32_t x2, uint32_t x3, + uint32_t y0, uint32_t y1, + char *dst, const char *src, + uint32_t dst_pitch, + uint32_t swizzle_bit, + mem_copy_fn mem_copy) +{ + if (x0 == 0 && x3 == ytile_width && y0 == 0 && y1 == ytile_height) { + if (mem_copy == memcpy) + return ytiled_to_linear(0, 0, ytile_width, ytile_width, 0, ytile_height, + dst, src, dst_pitch, swizzle_bit, memcpy); + else if (mem_copy == rgba8_copy) + return ytiled_to_linear(0, 0, ytile_width, ytile_width, 0, ytile_height, + dst, src, dst_pitch, swizzle_bit, rgba8_copy); + } else { + if (mem_copy == memcpy) + return ytiled_to_linear(x0, x1, x2, x3, y0, y1, + dst, src, dst_pitch, swizzle_bit, memcpy); + else if (mem_copy == rgba8_copy) + return ytiled_to_linear(x0, x1, x2, x3, y0, y1, + dst, src, dst_pitch, swizzle_bit, rgba8_copy); + } + ytiled_to_linear(x0, x1, x2, x3, y0, y1, + dst, src, dst_pitch, swizzle_bit, mem_copy); +} /** * Copy from linear to tiled texture. @@ -397,10 +571,108 @@ linear_to_tiled(uint32_t xt1, uint32_t xt2, } } +/** + * Copy from tiled to linear texture. + * + * Divide the region given by X range [xt1, xt2) and Y range [yt1, yt2) into + * pieces that do not cross tile boundaries and copy each piece with a tile + * copy function (\ref tile_copy_fn). + * The X range is in bytes, i.e. pixels * bytes-per-pixel. + * The Y range is in pixels (i.e. unitless). + * 'dst' is the start of the texture and 'src' is the corresponding + * address to copy from, though copying begins at (xt1, yt1). + */ +void +tiled_to_linear(uint32_t xt1, uint32_t xt2, + uint32_t yt1, uint32_t yt2, + char *dst, const char *src, + uint32_t dst_pitch, uint32_t src_pitch, + bool has_swizzling, + uint32_t tiling, + mem_copy_fn mem_copy) +{ + tile_copy_fn tile_copy; + uint32_t xt0, xt3; + uint32_t yt0, yt3; + uint32_t xt, yt; + uint32_t tw, th, span; + uint32_t swizzle_bit = has_swizzling ? 1<<6 : 0; + + if (tiling == I915_TILING_X) { + tw = xtile_width; + th = xtile_height; + span = xtile_span; + tile_copy = xtiled_to_linear_faster; + } else if (tiling == I915_TILING_Y) { + tw = ytile_width; + th = ytile_height; + span = ytile_span; + tile_copy = ytiled_to_linear_faster; + } else { + unreachable("unsupported tiling"); + } + + /* Round out to tile boundaries. */ + xt0 = ALIGN_DOWN(xt1, tw); + xt3 = ALIGN_UP (xt2, tw); + yt0 = ALIGN_DOWN(yt1, th); + yt3 = ALIGN_UP (yt2, th); + + /* Loop over all tiles to which we have something to copy. + * 'xt' and 'yt' are the origin of the destination tile, whether copying + * copying a full or partial tile. + * tile_copy() copies one tile or partial tile. + * Looping x inside y is the faster memory access pattern. + */ + for (yt = yt0; yt < yt3; yt += th) { + for (xt = xt0; xt < xt3; xt += tw) { + /* The area to update is [x0,x3) x [y0,y1). + * May not want the whole tile, hence the min and max. + */ + uint32_t x0 = MAX2(xt1, xt); + uint32_t y0 = MAX2(yt1, yt); + uint32_t x3 = MIN2(xt2, xt + tw); + uint32_t y1 = MIN2(yt2, yt + th); + + /* [x0,x3) is split into [x0,x1), [x1,x2), [x2,x3) such that + * the middle interval is the longest span-aligned part. + * The sub-ranges could be empty. + */ + uint32_t x1, x2; + x1 = ALIGN_UP(x0, span); + if (x1 > x3) + x1 = x2 = x3; + else + x2 = ALIGN_DOWN(x3, span); + + assert(x0 <= x1 && x1 <= x2 && x2 <= x3); + assert(x1 - x0 < span && x3 - x2 < span); + assert(x3 - x0 <= tw); + assert((x2 - x1) % span == 0); + + /* Translate by (xt,yt) for single-tile copier. */ + tile_copy(x0-xt, x1-xt, x2-xt, x3-xt, + y0-yt, y1-yt, + dst + (ptrdiff_t) xt + (ptrdiff_t) yt * dst_pitch, + src + (ptrdiff_t) xt * th + (ptrdiff_t) yt * src_pitch, + dst_pitch, + swizzle_bit, + mem_copy); + } + } +} + /** * Determine which copy function to use for the given format combination * + * The only two possible copy functions which are ever returned are a + * direct memcpy and a RGBA <-> BGRA copy function. Since RGBA -> BGRA and + * BGRA -> RGBA are exactly the same operation (and memcpy is obviously + * symmetric), it doesn't matter whether the copy is from the tiled image + * to the untiled or vice versa. The copy function required is the same in + * either case so this function can be used. + * * \param[in] tiledFormat The format of the tiled image * \param[in] format The GL format of the client data * \param[in] type The GL type of the client data diff --git a/src/mesa/drivers/dri/i965/intel_tiled_memcpy.h b/src/mesa/drivers/dri/i965/intel_tiled_memcpy.h index ed7dabb792e..f64a32a2808 100644 --- a/src/mesa/drivers/dri/i965/intel_tiled_memcpy.h +++ b/src/mesa/drivers/dri/i965/intel_tiled_memcpy.h @@ -46,6 +46,15 @@ linear_to_tiled(uint32_t xt1, uint32_t xt2, uint32_t tiling, mem_copy_fn mem_copy); +void +tiled_to_linear(uint32_t xt1, uint32_t xt2, + uint32_t yt1, uint32_t yt2, + char *dst, const char *src, + uint32_t dst_pitch, uint32_t src_pitch, + bool has_swizzling, + uint32_t tiling, + mem_copy_fn mem_copy); + bool intel_get_memcpy(mesa_format tiledFormat, GLenum format, GLenum type, mem_copy_fn* mem_copy, uint32_t* cpp); |