/**************************************************************************
*
- * Copyright 2009 Vmware, Inc.
+ * Copyright 2010 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
*
**************************************************************************/
+/**
+ * @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;
+ }
+
+ /* Find the first non-void channel. */
+ for (i = 0; i < 4; i++) {
+ if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
+ break;
+ }
+ }
+
+ if (i == 4) {
+ return FALSE;
+ }
+
+ return desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT ? TRUE : 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);
+}
+
+
+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;
+ }
-const struct util_format_description *
-util_format_description(enum pipe_format format)
+ 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 *desc = util_format_description_table;
+ 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);
- while(TRUE) {
- if(desc->format == format)
- return desc;
+ 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);
- if(desc->format == PIPE_FORMAT_NONE)
- return NULL;
+ /*
+ * 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);
+ }
+}
+
+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;
- ++desc;
- };
+ 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;
+ }
+ }
}
projects / mesa.git / blobdiff