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-rw-r--r--src/gallium/auxiliary/util/u_rect.c329
1 files changed, 329 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_rect.c b/src/gallium/auxiliary/util/u_rect.c
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+++ b/src/gallium/auxiliary/util/u_rect.c
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+/**************************************************************************
+ *
+ * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * 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 TUNGSTEN GRAPHICS 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.
+ *
+ **************************************************************************/
+
+/**
+ * Rectangle-related helper functions.
+ */
+
+
+#include "pipe/p_defines.h"
+#include "pipe/p_format.h"
+#include "pipe/p_context.h"
+#include "pipe/p_screen.h"
+#include "util/u_rect.h"
+
+
+/**
+ * Copy 2D rect from one place to another.
+ * Position and sizes are in pixels.
+ * src_pitch may be negative to do vertical flip of pixels from source.
+ */
+void
+pipe_copy_rect(ubyte * dst,
+ const struct pipe_format_block *block,
+ unsigned dst_stride,
+ unsigned dst_x,
+ unsigned dst_y,
+ unsigned width,
+ unsigned height,
+ const ubyte * src,
+ int src_stride,
+ unsigned src_x,
+ int src_y)
+{
+ unsigned i;
+ int src_stride_pos = src_stride < 0 ? -src_stride : src_stride;
+
+ assert(block->size > 0);
+ assert(block->width > 0);
+ assert(block->height > 0);
+ assert(src_x >= 0);
+ assert(src_y >= 0);
+ assert(dst_x >= 0);
+ assert(dst_y >= 0);
+
+ dst_x /= block->width;
+ dst_y /= block->height;
+ width = (width + block->width - 1)/block->width;
+ height = (height + block->height - 1)/block->height;
+ src_x /= block->width;
+ src_y /= block->height;
+
+ dst += dst_x * block->size;
+ src += src_x * block->size;
+ dst += dst_y * dst_stride;
+ src += src_y * src_stride_pos;
+ width *= block->size;
+
+ if (width == dst_stride && width == src_stride)
+ memcpy(dst, src, height * width);
+ else {
+ for (i = 0; i < height; i++) {
+ memcpy(dst, src, width);
+ dst += dst_stride;
+ src += src_stride;
+ }
+ }
+}
+
+void
+pipe_fill_rect(ubyte * dst,
+ const struct pipe_format_block *block,
+ unsigned dst_stride,
+ unsigned dst_x,
+ unsigned dst_y,
+ unsigned width,
+ unsigned height,
+ uint32_t value)
+{
+ unsigned i, j;
+ unsigned width_size;
+
+ assert(block->size > 0);
+ assert(block->width > 0);
+ assert(block->height > 0);
+ assert(dst_x >= 0);
+ assert(dst_y >= 0);
+
+ dst_x /= block->width;
+ dst_y /= block->height;
+ width = (width + block->width - 1)/block->width;
+ height = (height + block->height - 1)/block->height;
+
+ dst += dst_x * block->size;
+ dst += dst_y * dst_stride;
+ width_size = width * block->size;
+
+ switch (block->size) {
+ case 1:
+ if(dst_stride == width_size)
+ memset(dst, (ubyte) value, height * width_size);
+ else {
+ for (i = 0; i < height; i++) {
+ memset(dst, (ubyte) value, width_size);
+ dst += dst_stride;
+ }
+ }
+ break;
+ case 2:
+ for (i = 0; i < height; i++) {
+ uint16_t *row = (uint16_t *)dst;
+ for (j = 0; j < width; j++)
+ *row++ = (uint16_t) value;
+ dst += dst_stride;
+ }
+ break;
+ case 4:
+ for (i = 0; i < height; i++) {
+ uint32_t *row = (uint32_t *)dst;
+ for (j = 0; j < width; j++)
+ *row++ = value;
+ dst += dst_stride;
+ }
+ break;
+ default:
+ assert(0);
+ break;
+ }
+}
+
+
+
+/**
+ * Fallback function for pipe->surface_copy().
+ * Note: (X,Y)=(0,0) is always the upper-left corner.
+ * if do_flip, flip the image vertically on its way from src rect to dst rect.
+ * XXX should probably put this in new u_surface.c file...
+ */
+void
+util_surface_copy(struct pipe_context *pipe,
+ boolean do_flip,
+ struct pipe_surface *dst,
+ unsigned dst_x, unsigned dst_y,
+ struct pipe_surface *src,
+ unsigned src_x, unsigned src_y,
+ unsigned w, unsigned h)
+{
+ struct pipe_screen *screen = pipe->screen;
+ struct pipe_surface *new_src = NULL, *new_dst = NULL;
+ void *dst_map;
+ const void *src_map;
+
+ assert(dst->block.size == src->block.size);
+ assert(dst->block.width == src->block.width);
+ assert(dst->block.height == src->block.height);
+
+ if ((src->usage & PIPE_BUFFER_USAGE_CPU_READ) == 0) {
+ /* Need to create new src surface which is CPU readable */
+ assert(src->texture);
+ if (!src->texture)
+ return;
+ new_src = screen->get_tex_surface(screen,
+ src->texture,
+ src->face,
+ src->level,
+ src->zslice,
+ PIPE_BUFFER_USAGE_CPU_READ);
+ src = new_src;
+ }
+
+ if ((dst->usage & PIPE_BUFFER_USAGE_CPU_WRITE) == 0) {
+ /* Need to create new dst surface which is CPU writable */
+ assert(dst->texture);
+ if (!dst->texture)
+ return;
+ new_dst = screen->get_tex_surface(screen,
+ dst->texture,
+ dst->face,
+ dst->level,
+ dst->zslice,
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+ dst = new_dst;
+ }
+
+ src_map = pipe->screen->surface_map(screen,
+ src, PIPE_BUFFER_USAGE_CPU_READ);
+ dst_map = pipe->screen->surface_map(screen,
+ dst, PIPE_BUFFER_USAGE_CPU_WRITE);
+
+ assert(src_map);
+ assert(dst_map);
+
+ if (src_map && dst_map) {
+ /* If do_flip, invert src_y position and pass negative src stride */
+ pipe_copy_rect(dst_map,
+ &dst->block,
+ dst->stride,
+ dst_x, dst_y,
+ w, h,
+ src_map,
+ do_flip ? -(int) src->stride : src->stride,
+ src_x,
+ do_flip ? w - src_y : src_y);
+ }
+
+ pipe->screen->surface_unmap(pipe->screen, src);
+ pipe->screen->surface_unmap(pipe->screen, dst);
+
+ if (new_src)
+ screen->tex_surface_release(screen, &new_src);
+ if (new_dst)
+ screen->tex_surface_release(screen, &new_dst);
+}
+
+
+
+static void *
+get_pointer(struct pipe_surface *dst, void *dst_map, unsigned x, unsigned y)
+{
+ return (char *)dst_map
+ + y / dst->block.height * dst->stride
+ + x / dst->block.width * dst->block.size;
+}
+
+
+#define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
+
+
+/**
+ * Fallback for pipe->surface_fill() function.
+ * XXX should probably put this in new u_surface.c file...
+ */
+void
+util_surface_fill(struct pipe_context *pipe,
+ struct pipe_surface *dst,
+ unsigned dstx, unsigned dsty,
+ unsigned width, unsigned height, unsigned value)
+{
+ struct pipe_screen *screen = pipe->screen;
+ struct pipe_surface *new_dst = NULL;
+ void *dst_map;
+
+ if ((dst->usage & PIPE_BUFFER_USAGE_CPU_WRITE) == 0) {
+ /* Need to create new dst surface which is CPU writable */
+ assert(dst->texture);
+ if (!dst->texture)
+ return;
+ new_dst = screen->get_tex_surface(screen,
+ dst->texture,
+ dst->face,
+ dst->level,
+ dst->zslice,
+ PIPE_BUFFER_USAGE_CPU_WRITE);
+ dst = new_dst;
+ }
+
+ dst_map = pipe->screen->surface_map(screen,
+ dst, PIPE_BUFFER_USAGE_CPU_WRITE);
+
+ assert(dst_map);
+
+ if (dst_map) {
+ assert(dst->stride > 0);
+
+ switch (dst->block.size) {
+ case 1:
+ case 2:
+ case 4:
+ pipe_fill_rect(dst_map, &dst->block, dst->stride,
+ dstx, dsty, width, height, value);
+ break;
+ case 8:
+ {
+ /* expand the 4-byte clear value to an 8-byte value */
+ ushort *row = (ushort *) get_pointer(dst, dst_map, dstx, dsty);
+ ushort val0 = UBYTE_TO_USHORT((value >> 0) & 0xff);
+ ushort val1 = UBYTE_TO_USHORT((value >> 8) & 0xff);
+ ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
+ ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
+ unsigned i, j;
+ val0 = (val0 << 8) | val0;
+ val1 = (val1 << 8) | val1;
+ val2 = (val2 << 8) | val2;
+ val3 = (val3 << 8) | val3;
+ for (i = 0; i < height; i++) {
+ for (j = 0; j < width; j++) {
+ row[j*4+0] = val0;
+ row[j*4+1] = val1;
+ row[j*4+2] = val2;
+ row[j*4+3] = val3;
+ }
+ row += dst->stride/2;
+ }
+ }
+ break;
+ default:
+ assert(0);
+ break;
+ }
+ }
+
+ pipe->screen->surface_unmap(pipe->screen, dst);
+
+ if (new_dst)
+ screen->tex_surface_release(screen, &new_dst);
+}
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