/************************************************************************** * * 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_format.h" #include "u_format_s3tc.h" #include "u_surface.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); int i; assert(desc); if (!desc) { return FALSE; } i = util_format_get_first_non_void_channel(format); if (i < 0) { return FALSE; } return desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT ? TRUE : FALSE; } /** Test if the format contains RGB, but not alpha */ boolean util_format_has_alpha(enum pipe_format format) { const struct util_format_description *desc = util_format_description(format); return (desc->colorspace == UTIL_FORMAT_COLORSPACE_RGB || desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB) && desc->swizzle[3] != PIPE_SWIZZLE_1; } 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] == PIPE_SWIZZLE_X && desc->swizzle[1] == PIPE_SWIZZLE_X && desc->swizzle[2] == PIPE_SWIZZLE_X && desc->swizzle[3] == PIPE_SWIZZLE_1) { return TRUE; } return FALSE; } boolean util_format_is_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] == PIPE_SWIZZLE_0 && desc->swizzle[1] == PIPE_SWIZZLE_0 && desc->swizzle[2] == PIPE_SWIZZLE_0 && desc->swizzle[3] == PIPE_SWIZZLE_X) { 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; } /** * Returns true if all non-void channels are normalized signed. */ boolean util_format_is_snorm(enum pipe_format format) { const struct util_format_description *desc = util_format_description(format); int i; if (desc->is_mixed) return FALSE; 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 && desc->channel[i].normalized; } boolean util_format_is_snorm8(enum pipe_format format) { const struct util_format_description *desc = util_format_description(format); int i; if (desc->is_mixed) return FALSE; 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 && desc->channel[i].normalized && desc->channel[i].size == 8; } 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] == PIPE_SWIZZLE_X && desc->swizzle[1] == PIPE_SWIZZLE_X && desc->swizzle[2] == PIPE_SWIZZLE_X && desc->swizzle[3] == PIPE_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] == PIPE_SWIZZLE_X && desc->swizzle[1] == PIPE_SWIZZLE_X && desc->swizzle[2] == PIPE_SWIZZLE_X && desc->swizzle[3] == PIPE_SWIZZLE_X) { return TRUE; } return FALSE; } boolean util_format_is_subsampled_422(enum pipe_format format) { const struct util_format_description *desc = util_format_description(format); return desc->layout == UTIL_FORMAT_LAYOUT_SUBSAMPLED && desc->block.width == 2 && desc->block.height == 1 && desc->block.bits == 32; } 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; } /** * Calculates the MRD for the depth format. MRD is used in depth bias * for UNORM and unbound depth buffers. When the depth buffer is floating * point, the depth bias calculation does not use the MRD. However, the * default MRD will be 1.0 / ((1 << 24) - 1). */ double util_get_depth_format_mrd(const struct util_format_description *desc) { /* * Depth buffer formats without a depth component OR scenarios * without a bound depth buffer default to D24. */ double mrd = 1.0 / ((1 << 24) - 1); unsigned depth_channel; assert(desc); /* * Some depth formats do not store the depth component in the first * channel, detect the format and adjust the depth channel. Get the * swizzled depth component channel. */ depth_channel = desc->swizzle[0]; if (desc->channel[depth_channel].type == UTIL_FORMAT_TYPE_UNSIGNED && desc->channel[depth_channel].normalized) { int depth_bits; depth_bits = desc->channel[depth_channel].size; mrd = 1.0 / ((1ULL << depth_bits) - 1); } return mrd; } 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; uint32_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_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 uint32_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_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; int32_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_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 int32_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_sint(dst_row, dst_stride, src_row, src_stride, w, h); } /** * Check if we can safely memcopy from the source format to the dest format. * This basically covers the cases of a "used" channel copied to a typeless * channel, plus some 1-channel cases. * Examples of compatible copy formats include: * b8g8r8a8_unorm -> b8g8r8x8_unorm * a8r8g8b8_unorm -> x8r8g8b8_unorm * b5g5r5a1_unorm -> b5g5r5x1_unorm * b4g4r4a4_unorm -> b4g4r4x4_unorm * l8_unorm -> r8_unorm * i8_unorm -> l8_unorm * i8_unorm -> a8_unorm * i8_unorm -> r8_unorm * l16_unorm -> r16_unorm * z24_unorm_s8_uint -> z24x8_unorm * s8_uint_z24_unorm -> x8z24_unorm * r8g8b8a8_unorm -> r8g8b8x8_unorm * a8b8g8r8_srgb -> x8b8g8r8_srgb * b8g8r8a8_srgb -> b8g8r8x8_srgb * a8r8g8b8_srgb -> x8r8g8b8_srgb * a8b8g8r8_unorm -> x8b8g8r8_unorm * r10g10b10a2_uscaled -> r10g10b10x2_uscaled * r10sg10sb10sa2u_norm -> r10g10b10x2_snorm */ 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 pipe_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_BPTC: if (format_desc->format == PIPE_FORMAT_BPTC_RGBA_UNORM) return TRUE; return FALSE; 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; } } } boolean 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 TRUE; } 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; } FREE(tmp_s); FREE(tmp_z); return TRUE; } if (util_format_fits_8unorm(src_format_desc) || util_format_fits_8unorm(dst_format_desc)) { unsigned tmp_stride; uint8_t *tmp_row; if (!src_format_desc->unpack_rgba_8unorm || !dst_format_desc->pack_rgba_8unorm) { return FALSE; } tmp_stride = MAX2(width, x_step) * 4 * sizeof *tmp_row; tmp_row = MALLOC(y_step * tmp_stride); if (!tmp_row) return FALSE; 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; if (!src_format_desc->unpack_rgba_float || !dst_format_desc->pack_rgba_float) { return FALSE; } tmp_stride = MAX2(width, x_step) * 4 * sizeof *tmp_row; tmp_row = MALLOC(y_step * tmp_stride); if (!tmp_row) return FALSE; 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); } return TRUE; } boolean util_format_translate_3d(enum pipe_format dst_format, void *dst, unsigned dst_stride, unsigned dst_slice_stride, unsigned dst_x, unsigned dst_y, unsigned dst_z, enum pipe_format src_format, const void *src, unsigned src_stride, unsigned src_slice_stride, unsigned src_x, unsigned src_y, unsigned src_z, unsigned width, unsigned height, unsigned depth) { uint8_t *dst_layer; const uint8_t *src_layer; unsigned z; dst_layer = dst; src_layer = src; dst_layer += dst_z * dst_slice_stride; src_layer += src_z * src_slice_stride; for (z = 0; z < depth; ++z) { if (!util_format_translate(dst_format, dst_layer, dst_stride, dst_x, dst_y, src_format, src_layer, src_stride, src_x, src_y, width, height)) return FALSE; dst_layer += dst_slice_stride; src_layer += src_slice_stride; } return TRUE; } 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] <= PIPE_SWIZZLE_W ? swz1[swz2[i]] : swz2[i]; } } void util_format_apply_color_swizzle(union pipe_color_union *dst, const union pipe_color_union *src, const unsigned char swz[4], const boolean is_integer) { unsigned c; if (is_integer) { for (c = 0; c < 4; ++c) { switch (swz[c]) { case PIPE_SWIZZLE_X: dst->ui[c] = src->ui[0]; break; case PIPE_SWIZZLE_Y: dst->ui[c] = src->ui[1]; break; case PIPE_SWIZZLE_Z: dst->ui[c] = src->ui[2]; break; case PIPE_SWIZZLE_W: dst->ui[c] = src->ui[3]; break; default: dst->ui[c] = (swz[c] == PIPE_SWIZZLE_1) ? 1 : 0; break; } } } else { for (c = 0; c < 4; ++c) { switch (swz[c]) { case PIPE_SWIZZLE_X: dst->f[c] = src->f[0]; break; case PIPE_SWIZZLE_Y: dst->f[c] = src->f[1]; break; case PIPE_SWIZZLE_Z: dst->f[c] = src->f[2]; break; case PIPE_SWIZZLE_W: dst->f[c] = src->f[3]; break; default: dst->f[c] = (swz[c] == PIPE_SWIZZLE_1) ? 1.0f : 0.0f; break; } } } } void pipe_swizzle_4f(float *dst, const float *src, const unsigned char swz[4]) { unsigned i; for (i = 0; i < 4; i++) { if (swz[i] <= PIPE_SWIZZLE_W) dst[i] = src[swz[i]]; else if (swz[i] == PIPE_SWIZZLE_0) dst[i] = 0; else if (swz[i] == PIPE_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 PIPE_SWIZZLE_X: dst[0] = src[i]; break; case PIPE_SWIZZLE_Y: dst[1] = src[i]; break; case PIPE_SWIZZLE_Z: dst[2] = src[i]; break; case PIPE_SWIZZLE_W: dst[3] = src[i]; break; } } }