diff options
Diffstat (limited to 'src/gallium/auxiliary/util/u_rect.c')
-rw-r--r-- | src/gallium/auxiliary/util/u_rect.c | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_rect.c b/src/gallium/auxiliary/util/u_rect.c new file mode 100644 index 0000000000..9866b6fc8a --- /dev/null +++ b/src/gallium/auxiliary/util/u_rect.c @@ -0,0 +1,301 @@ +/************************************************************************** + * + * 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 +util_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 +util_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_transfer *src_trans, *dst_trans; + void *dst_map; + const void *src_map; + + assert(src->texture && dst->texture); + if (!src->texture || !dst->texture) + return; + src_trans = screen->get_tex_transfer(screen, + src->texture, + src->face, + src->level, + src->zslice, + PIPE_TRANSFER_READ, + src_x, src_y, w, h); + + dst_trans = screen->get_tex_transfer(screen, + dst->texture, + dst->face, + dst->level, + dst->zslice, + PIPE_TRANSFER_WRITE, + dst_x, dst_y, w, h); + + assert(dst_trans->block.size == src_trans->block.size); + assert(dst_trans->block.width == src_trans->block.width); + assert(dst_trans->block.height == src_trans->block.height); + + src_map = pipe->screen->transfer_map(screen, src_trans); + dst_map = pipe->screen->transfer_map(screen, dst_trans); + + assert(src_map); + assert(dst_map); + + if (src_map && dst_map) { + /* If do_flip, invert src_y position and pass negative src stride */ + util_copy_rect(dst_map, + &dst_trans->block, + dst_trans->stride, + 0, 0, + w, h, + src_map, + do_flip ? -(int) src_trans->stride : src_trans->stride, + 0, + do_flip ? h - 1 : 0); + } + + pipe->screen->transfer_unmap(pipe->screen, src_trans); + pipe->screen->transfer_unmap(pipe->screen, dst_trans); + + screen->tex_transfer_destroy(src_trans); + screen->tex_transfer_destroy(dst_trans); +} + + + +#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_transfer *dst_trans; + void *dst_map; + + assert(dst->texture); + if (!dst->texture) + return; + dst_trans = screen->get_tex_transfer(screen, + dst->texture, + dst->face, + dst->level, + dst->zslice, + PIPE_TRANSFER_WRITE, + dstx, dsty, width, height); + + dst_map = pipe->screen->transfer_map(screen, dst_trans); + + assert(dst_map); + + if (dst_map) { + assert(dst_trans->stride > 0); + + switch (dst_trans->block.size) { + case 1: + case 2: + case 4: + util_fill_rect(dst_map, &dst_trans->block, dst_trans->stride, + 0, 0, width, height, value); + break; + case 8: + { + /* expand the 4-byte clear value to an 8-byte value */ + ushort *row = (ushort *) dst_map; + 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_trans->stride/2; + } + } + break; + default: + assert(0); + break; + } + } + + pipe->screen->transfer_unmap(pipe->screen, dst_trans); + screen->tex_transfer_destroy(dst_trans); +} |