| /************************************************************************** |
| * |
| * 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 <jfonseca@vmware.com> |
| */ |
| |
| #include "u_math.h" |
| #include "u_memory.h" |
| #include "u_rect.h" |
| #include "u_format.h" |
| #include "u_format_s3tc.h" |
| |
| #include "pipe/p_defines.h" |
| |
| |
| boolean |
| util_format_is_float(enum pipe_format format) |
| { |
| const struct util_format_description *desc = util_format_description(format); |
| unsigned i; |
| |
| assert(desc); |
| if (!desc) { |
| return FALSE; |
| } |
| |
| i = util_format_get_first_non_void_channel(format); |
| if (i == -1) { |
| return FALSE; |
| } |
| |
| return desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT ? TRUE : FALSE; |
| } |
| |
| |
| /** |
| * Return the number of logical channels in the given format by |
| * examining swizzles. |
| * XXX this could be made into a public function if useful elsewhere. |
| */ |
| static unsigned |
| nr_logical_channels(const struct util_format_description *desc) |
| { |
| boolean swizzle_used[UTIL_FORMAT_SWIZZLE_MAX]; |
| |
| memset(swizzle_used, 0, sizeof(swizzle_used)); |
| |
| swizzle_used[desc->swizzle[0]] = TRUE; |
| swizzle_used[desc->swizzle[1]] = TRUE; |
| swizzle_used[desc->swizzle[2]] = TRUE; |
| swizzle_used[desc->swizzle[3]] = TRUE; |
| |
| return (swizzle_used[UTIL_FORMAT_SWIZZLE_X] + |
| swizzle_used[UTIL_FORMAT_SWIZZLE_Y] + |
| swizzle_used[UTIL_FORMAT_SWIZZLE_Z] + |
| swizzle_used[UTIL_FORMAT_SWIZZLE_W]); |
| } |
| |
| |
| /** Test if the format contains RGB, but not alpha */ |
| boolean |
| util_format_is_rgb_no_alpha(enum pipe_format format) |
| { |
| const struct util_format_description *desc = |
| util_format_description(format); |
| |
| if ((desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB || |
| desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) && |
| nr_logical_channels(desc) == 3) { |
| return TRUE; |
| } |
| return FALSE; |
| } |
| |
| |
| boolean |
| util_format_is_luminance(enum pipe_format format) |
| { |
| const struct util_format_description *desc = |
| util_format_description(format); |
| |
| if ((desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB || |
| desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) && |
| desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[1] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[2] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[3] == UTIL_FORMAT_SWIZZLE_1) { |
| return TRUE; |
| } |
| return FALSE; |
| } |
| |
| boolean |
| util_format_is_pure_integer(enum pipe_format format) |
| { |
| const struct util_format_description *desc = util_format_description(format); |
| int i; |
| |
| /* Find the first non-void channel. */ |
| i = util_format_get_first_non_void_channel(format); |
| if (i == -1) |
| return FALSE; |
| |
| return desc->channel[i].pure_integer ? TRUE : FALSE; |
| } |
| |
| boolean |
| util_format_is_pure_sint(enum pipe_format format) |
| { |
| const struct util_format_description *desc = util_format_description(format); |
| int i; |
| |
| i = util_format_get_first_non_void_channel(format); |
| if (i == -1) |
| return FALSE; |
| |
| return (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED && desc->channel[i].pure_integer) ? TRUE : FALSE; |
| } |
| |
| boolean |
| util_format_is_pure_uint(enum pipe_format format) |
| { |
| const struct util_format_description *desc = util_format_description(format); |
| int i; |
| |
| i = util_format_get_first_non_void_channel(format); |
| if (i == -1) |
| return FALSE; |
| |
| return (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED && desc->channel[i].pure_integer) ? TRUE : FALSE; |
| } |
| |
| boolean |
| util_format_is_array(const struct util_format_description *desc) |
| { |
| unsigned chan; |
| |
| if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN || |
| desc->colorspace != UTIL_FORMAT_COLORSPACE_RGB || |
| desc->block.width != 1 || |
| desc->block.height != 1) { |
| return FALSE; |
| } |
| |
| for (chan = 0; chan < desc->nr_channels; ++chan) { |
| if (desc->swizzle[chan] != chan) |
| return FALSE; |
| |
| if (desc->channel[chan].type != desc->channel[0].type) |
| return FALSE; |
| |
| if (desc->channel[chan].normalized != desc->channel[0].normalized) |
| return FALSE; |
| |
| if (desc->channel[chan].pure_integer != desc->channel[0].pure_integer) |
| return FALSE; |
| |
| if (desc->channel[chan].size != desc->channel[0].size) |
| return FALSE; |
| } |
| |
| return TRUE; |
| } |
| |
| boolean |
| util_format_is_luminance_alpha(enum pipe_format format) |
| { |
| const struct util_format_description *desc = |
| util_format_description(format); |
| |
| if ((desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB || |
| desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) && |
| desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[1] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[2] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[3] == UTIL_FORMAT_SWIZZLE_Y) { |
| return TRUE; |
| } |
| return FALSE; |
| } |
| |
| |
| boolean |
| util_format_is_intensity(enum pipe_format format) |
| { |
| const struct util_format_description *desc = |
| util_format_description(format); |
| |
| if ((desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB || |
| desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) && |
| desc->swizzle[0] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[1] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[2] == UTIL_FORMAT_SWIZZLE_X && |
| desc->swizzle[3] == UTIL_FORMAT_SWIZZLE_X) { |
| return TRUE; |
| } |
| return FALSE; |
| } |
| |
| |
| boolean |
| util_format_is_supported(enum pipe_format format, unsigned bind) |
| { |
| if (util_format_is_s3tc(format) && !util_format_s3tc_enabled) { |
| return FALSE; |
| } |
| |
| #ifndef TEXTURE_FLOAT_ENABLED |
| if ((bind & PIPE_BIND_RENDER_TARGET) && |
| format != PIPE_FORMAT_R9G9B9E5_FLOAT && |
| format != PIPE_FORMAT_R11G11B10_FLOAT && |
| util_format_is_float(format)) { |
| return FALSE; |
| } |
| #endif |
| |
| return TRUE; |
| } |
| |
| |
| 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); |
| } |
| |
| void |
| util_format_read_4ui(enum pipe_format format, |
| unsigned *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; |
| unsigned *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_uint(dst_row, dst_stride, src_row, src_stride, w, h); |
| } |
| |
| void |
| util_format_write_4ui(enum pipe_format format, |
| const unsigned int *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 unsigned *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_uint(dst_row, dst_stride, src_row, src_stride, w, h); |
| } |
| |
| void |
| util_format_read_4i(enum pipe_format format, |
| int *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; |
| int *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_sint(dst_row, dst_stride, src_row, src_stride, w, h); |
| } |
| |
| void |
| util_format_write_4i(enum pipe_format format, |
| const int *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 int *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_sint(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: |
| /* |
| * These are straight forward. |
| */ |
| return TRUE; |
| case UTIL_FORMAT_LAYOUT_RGTC: |
| if (format_desc->format == PIPE_FORMAT_RGTC1_SNORM || |
| format_desc->format == PIPE_FORMAT_RGTC2_SNORM || |
| format_desc->format == PIPE_FORMAT_LATC1_SNORM || |
| format_desc->format == PIPE_FORMAT_LATC2_SNORM) |
| return FALSE; |
| 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 (src_format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS || |
| dst_format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS) { |
| float *tmp_z = NULL; |
| uint8_t *tmp_s = NULL; |
| |
| assert(x_step == 1); |
| assert(y_step == 1); |
| |
| if (src_format_desc->unpack_z_float && |
| dst_format_desc->pack_z_float) { |
| tmp_z = MALLOC(width * sizeof *tmp_z); |
| } |
| |
| if (src_format_desc->unpack_s_8uint && |
| dst_format_desc->pack_s_8uint) { |
| tmp_s = MALLOC(width * sizeof *tmp_s); |
| } |
| |
| while (height--) { |
| if (tmp_z) { |
| src_format_desc->unpack_z_float(tmp_z, 0, src_row, src_stride, width, 1); |
| dst_format_desc->pack_z_float(dst_row, dst_stride, tmp_z, 0, width, 1); |
| } |
| |
| if (tmp_s) { |
| src_format_desc->unpack_s_8uint(tmp_s, 0, src_row, src_stride, width, 1); |
| dst_format_desc->pack_s_8uint(dst_row, dst_stride, tmp_s, 0, width, 1); |
| } |
| |
| dst_row += dst_step; |
| src_row += src_step; |
| } |
| |
| if (tmp_s) { |
| FREE(tmp_s); |
| } |
| |
| if (tmp_z) { |
| FREE(tmp_z); |
| } |
| |
| return; |
| } |
| |
| 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); |
| } |
| } |
| |
| void util_format_compose_swizzles(const unsigned char swz1[4], |
| const unsigned char swz2[4], |
| unsigned char dst[4]) |
| { |
| unsigned i; |
| |
| for (i = 0; i < 4; i++) { |
| dst[i] = swz2[i] <= UTIL_FORMAT_SWIZZLE_W ? |
| swz1[swz2[i]] : swz2[i]; |
| } |
| } |
| |
| void util_format_swizzle_4f(float *dst, const float *src, |
| const unsigned char swz[4]) |
| { |
| unsigned i; |
| |
| for (i = 0; i < 4; i++) { |
| if (swz[i] <= UTIL_FORMAT_SWIZZLE_W) |
| dst[i] = src[swz[i]]; |
| else if (swz[i] == UTIL_FORMAT_SWIZZLE_0) |
| dst[i] = 0; |
| else if (swz[i] == UTIL_FORMAT_SWIZZLE_1) |
| dst[i] = 1; |
| } |
| } |
| |
| void util_format_unswizzle_4f(float *dst, const float *src, |
| const unsigned char swz[4]) |
| { |
| unsigned i; |
| |
| for (i = 0; i < 4; i++) { |
| switch (swz[i]) { |
| case UTIL_FORMAT_SWIZZLE_X: |
| dst[0] = src[i]; |
| break; |
| case UTIL_FORMAT_SWIZZLE_Y: |
| dst[1] = src[i]; |
| break; |
| case UTIL_FORMAT_SWIZZLE_Z: |
| dst[2] = src[i]; |
| break; |
| case UTIL_FORMAT_SWIZZLE_W: |
| dst[3] = src[i]; |
| break; |
| } |
| } |
| } |