/************************************************************************** * * Copyright 2010 VMware, Inc. * All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sub license, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * **************************************************************************/ /** * @file * Pixel format accessor functions. * * @author Jose Fonseca */ #include "u_math.h" #include "u_memory.h" #include "u_rect.h" #include "u_format.h" void util_format_read_4f(enum pipe_format format, float *dst, unsigned dst_stride, const void *src, unsigned src_stride, unsigned x, unsigned y, unsigned w, unsigned h) { const struct util_format_description *format_desc; const uint8_t *src_row; float *dst_row; format_desc = util_format_description(format); assert(x % format_desc->block.width == 0); assert(y % format_desc->block.height == 0); src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8); dst_row = dst; format_desc->unpack_rgba_float(dst_row, dst_stride, src_row, src_stride, w, h); } void util_format_write_4f(enum pipe_format format, const float *src, unsigned src_stride, void *dst, unsigned dst_stride, unsigned x, unsigned y, unsigned w, unsigned h) { const struct util_format_description *format_desc; uint8_t *dst_row; const float *src_row; format_desc = util_format_description(format); assert(x % format_desc->block.width == 0); assert(y % format_desc->block.height == 0); dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8); src_row = src; format_desc->pack_rgba_float(dst_row, dst_stride, src_row, src_stride, w, h); } void util_format_read_4ub(enum pipe_format format, uint8_t *dst, unsigned dst_stride, const void *src, unsigned src_stride, unsigned x, unsigned y, unsigned w, unsigned h) { const struct util_format_description *format_desc; const uint8_t *src_row; uint8_t *dst_row; format_desc = util_format_description(format); assert(x % format_desc->block.width == 0); assert(y % format_desc->block.height == 0); src_row = (const uint8_t *)src + y*src_stride + x*(format_desc->block.bits/8); dst_row = dst; format_desc->unpack_rgba_8unorm(dst_row, dst_stride, src_row, src_stride, w, h); } void util_format_write_4ub(enum pipe_format format, const uint8_t *src, unsigned src_stride, void *dst, unsigned dst_stride, unsigned x, unsigned y, unsigned w, unsigned h) { const struct util_format_description *format_desc; uint8_t *dst_row; const uint8_t *src_row; format_desc = util_format_description(format); assert(x % format_desc->block.width == 0); assert(y % format_desc->block.height == 0); dst_row = (uint8_t *)dst + y*dst_stride + x*(format_desc->block.bits/8); src_row = src; format_desc->pack_rgba_8unorm(dst_row, dst_stride, src_row, src_stride, w, h); } boolean util_is_format_compatible(const struct util_format_description *src_desc, const struct util_format_description *dst_desc) { unsigned chan; if (src_desc->format == dst_desc->format) { return TRUE; } if (src_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN || dst_desc->layout != UTIL_FORMAT_LAYOUT_PLAIN) { return FALSE; } if (src_desc->block.bits != dst_desc->block.bits || src_desc->nr_channels != dst_desc->nr_channels || src_desc->colorspace != dst_desc->colorspace) { return FALSE; } for (chan = 0; chan < 4; ++chan) { if (src_desc->channel[chan].size != dst_desc->channel[chan].size) { return FALSE; } } for (chan = 0; chan < 4; ++chan) { enum util_format_swizzle swizzle = dst_desc->swizzle[chan]; if (swizzle < 4) { if (src_desc->swizzle[chan] != swizzle) { return FALSE; } if ((src_desc->channel[swizzle].type != dst_desc->channel[swizzle].type) || (src_desc->channel[swizzle].normalized != dst_desc->channel[swizzle].normalized)) { return FALSE; } } } return TRUE; } boolean util_format_fits_8unorm(const struct util_format_description *format_desc) { unsigned chan; /* * After linearized sRGB values require more than 8bits. */ if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) { return FALSE; } 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; } break; 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 x_step, y_step; unsigned dst_step; unsigned src_step; dst_format_desc = util_format_description(dst_format); src_format_desc = util_format_description(src_format); if (util_is_format_compatible(src_format_desc, dst_format_desc)) { /* * 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; } 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); x_step = MAX2(dst_format_desc->block.width, src_format_desc->block.width); 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 = MAX2(width, x_step) * 4 * sizeof *tmp_row; tmp_row = MALLOC(y_step * tmp_stride); if (!tmp_row) return; while (height >= y_step) { src_format_desc->unpack_rgba_8unorm(tmp_row, tmp_stride, src_row, src_stride, width, y_step); dst_format_desc->pack_rgba_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_rgba_8unorm(tmp_row, tmp_stride, src_row, src_stride, width, height); dst_format_desc->pack_rgba_8unorm(dst_row, dst_stride, tmp_row, tmp_stride, width, height); } FREE(tmp_row); } else { unsigned tmp_stride; float *tmp_row; tmp_stride = MAX2(width, x_step) * 4 * sizeof *tmp_row; tmp_row = MALLOC(y_step * tmp_stride); if (!tmp_row) return; while (height >= y_step) { src_format_desc->unpack_rgba_float(tmp_row, tmp_stride, src_row, src_stride, width, y_step); dst_format_desc->pack_rgba_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_rgba_float(tmp_row, tmp_stride, src_row, src_stride, width, height); dst_format_desc->pack_rgba_float(dst_row, dst_stride, tmp_row, tmp_stride, width, height); } FREE(tmp_row); } }