diff options
| -rw-r--r-- | src/gallium/auxiliary/util/u_format.c | 167 | ||||
| -rw-r--r-- | src/gallium/auxiliary/util/u_format.h | 13 |
2 files changed, 180 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_format.c b/src/gallium/auxiliary/util/u_format.c index 7f16cf7d01..418b354a96 100644 --- a/src/gallium/auxiliary/util/u_format.c +++ b/src/gallium/auxiliary/util/u_format.c @@ -32,6 +32,9 @@ * @author Jose Fonseca <jfonseca@vmware.com> */ +#include "u_math.h" +#include "u_memory.h" +#include "u_rect.h" #include "u_format.h" @@ -116,3 +119,167 @@ util_format_write_4ub(enum pipe_format format, const uint8_t *src, unsigned src_ format_desc->pack_8unorm(dst_row, dst_stride, src_row, src_stride, w, h); } + +static INLINE boolean +util_format_fits_8unorm(const struct util_format_description *format_desc) +{ + unsigned chan; + + switch (format_desc->layout) { + + case UTIL_FORMAT_LAYOUT_S3TC: + case UTIL_FORMAT_LAYOUT_RGTC: + /* + * These are straight forward. + */ + + return TRUE; + + case UTIL_FORMAT_LAYOUT_PLAIN: + /* + * For these we can find a generic rule. + */ + + for (chan = 0; chan < format_desc->nr_channels; ++chan) { + switch (format_desc->channel[chan].type) { + case UTIL_FORMAT_TYPE_VOID: + break; + case UTIL_FORMAT_TYPE_UNSIGNED: + if (!format_desc->channel[chan].normalized || + format_desc->channel[chan].size > 8) { + return FALSE; + } + default: + return FALSE; + } + } + return TRUE; + + default: + /* + * Handle all others on a case by case basis. + */ + + switch (format_desc->format) { + case PIPE_FORMAT_R1_UNORM: + case PIPE_FORMAT_UYVY: + case PIPE_FORMAT_YUYV: + case PIPE_FORMAT_R8G8_B8G8_UNORM: + case PIPE_FORMAT_G8R8_G8B8_UNORM: + return TRUE; + + default: + return FALSE; + } + } +} + + +void +util_format_translate(enum pipe_format dst_format, + void *dst, unsigned dst_stride, + unsigned dst_x, unsigned dst_y, + enum pipe_format src_format, + const void *src, unsigned src_stride, + unsigned src_x, unsigned src_y, + unsigned width, unsigned height) +{ + const struct util_format_description *dst_format_desc; + const struct util_format_description *src_format_desc; + uint8_t *dst_row; + const uint8_t *src_row; + unsigned y_step; + unsigned dst_step; + unsigned src_step; + + if (dst_format == src_format) { + /* + * Trivial case. + */ + + util_copy_rect(dst, dst_format, dst_stride, dst_x, dst_y, + width, height, src, (int)src_stride, + src_x, src_y); + return; + } + + dst_format_desc = util_format_description(dst_format); + src_format_desc = util_format_description(src_format); + + assert(dst_x % dst_format_desc->block.width == 0); + assert(dst_y % dst_format_desc->block.height == 0); + assert(src_x % src_format_desc->block.width == 0); + assert(src_y % src_format_desc->block.height == 0); + + dst_row = (uint8_t *)dst + dst_y*dst_stride + dst_x*(dst_format_desc->block.bits/8); + src_row = (const uint8_t *)src + src_y*src_stride + src_x*(src_format_desc->block.bits/8); + + /* + * This works because all pixel formats have pixel blocks with power of two + * sizes. + */ + + y_step = MAX2(dst_format_desc->block.height, src_format_desc->block.height); + assert(y_step % dst_format_desc->block.height == 0); + assert(y_step % src_format_desc->block.height == 0); + + dst_step = y_step / dst_format_desc->block.height * dst_stride; + src_step = y_step / src_format_desc->block.height * src_stride; + + /* + * TODO: double formats will loose precision + * TODO: Add a special case for formats that are mere swizzles of each other + */ + + if (util_format_fits_8unorm(src_format_desc) || + util_format_fits_8unorm(dst_format_desc)) { + unsigned tmp_stride; + uint8_t *tmp_row; + + tmp_stride = width * 4 * sizeof *tmp_row; + tmp_row = MALLOC(y_step * tmp_stride); + if (!tmp_row) + return; + + while (height >= y_step) { + src_format_desc->unpack_8unorm(tmp_row, tmp_stride, src_row, src_stride, width, y_step); + dst_format_desc->pack_8unorm(dst_row, dst_stride, tmp_row, tmp_stride, width, y_step); + + dst_row += dst_step; + src_row += src_step; + height -= y_step; + } + + if (height) { + src_format_desc->unpack_8unorm(tmp_row, tmp_stride, src_row, src_stride, width, height); + dst_format_desc->pack_8unorm(dst_row, dst_stride, tmp_row, tmp_stride, width, height); + } + + FREE(tmp_row); + } + else { + unsigned tmp_stride; + float *tmp_row; + + tmp_stride = width * 4 * sizeof *tmp_row; + tmp_row = MALLOC(y_step * tmp_stride); + if (!tmp_row) + return; + + while (height >= y_step) { + src_format_desc->unpack_float(tmp_row, tmp_stride, src_row, src_stride, width, y_step); + dst_format_desc->pack_float(dst_row, dst_stride, tmp_row, tmp_stride, width, y_step); + + dst_row += dst_step; + src_row += src_step; + height -= y_step; + } + + if (height) { + src_format_desc->unpack_float(tmp_row, tmp_stride, src_row, src_stride, width, height); + dst_format_desc->pack_float(dst_row, dst_stride, tmp_row, tmp_stride, width, height); + } + + FREE(tmp_row); + } +} diff --git a/src/gallium/auxiliary/util/u_format.h b/src/gallium/auxiliary/util/u_format.h index 93818a3161..a7c24f0c00 100644 --- a/src/gallium/auxiliary/util/u_format.h +++ b/src/gallium/auxiliary/util/u_format.h @@ -530,6 +530,19 @@ util_format_write_4ub(enum pipe_format format, void *dst, unsigned dst_stride, unsigned x, unsigned y, unsigned w, unsigned h); +/* + * Generic format conversion; + */ + +void +util_format_translate(enum pipe_format dst_format, + void *dst, unsigned dst_stride, + unsigned dst_x, unsigned dst_y, + enum pipe_format src_format, + const void *src, unsigned src_stride, + unsigned src_x, unsigned src_y, + unsigned width, unsigned height); + #ifdef __cplusplus } // extern "C" { #endif |