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gallium: new util_surface_copy() and util_surface_fill() helpers
These are plug-in fallbacks for the pipe->surface_copy() and pipe->surface_fill() functions.
This commit is contained in:
Brian Paul
parent
978f07bebd
commit
ce8c08c2b0
2 changed files with 196 additions and 0 deletions
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@ -32,6 +32,8 @@
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#include "pipe/p_defines.h"
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#include "pipe/p_format.h"
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#include "pipe/p_context.h"
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#include "pipe/p_screen.h"
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#include "util/u_rect.h"
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@ -148,3 +150,179 @@ pipe_fill_rect(ubyte * dst,
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break;
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}
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}
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/**
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* Fallback function for pipe->surface_copy().
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* Note: (X,Y)=(0,0) is always the upper-left corner.
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* if do_flip, flip the image vertically on its way from src rect to dst rect.
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* XXX should probably put this in new u_surface.c file...
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*/
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void
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util_surface_copy(struct pipe_context *pipe,
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boolean do_flip,
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struct pipe_surface *dst,
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unsigned dst_x, unsigned dst_y,
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struct pipe_surface *src,
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unsigned src_x, unsigned src_y,
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unsigned w, unsigned h)
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{
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struct pipe_screen *screen = pipe->screen;
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struct pipe_surface *new_src = NULL, *new_dst = NULL;
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void *dst_map;
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const void *src_map;
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assert(dst->block.size == src->block.size);
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assert(dst->block.width == src->block.width);
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assert(dst->block.height == src->block.height);
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if ((src->usage & PIPE_BUFFER_USAGE_CPU_READ) == 0) {
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/* Need to create new src surface which is CPU readable */
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assert(src->texture);
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if (!src->texture)
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return;
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new_src = screen->get_tex_surface(screen,
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src->texture,
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src->face,
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src->level,
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src->zslice,
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PIPE_BUFFER_USAGE_CPU_READ);
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src = new_src;
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}
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if ((dst->usage & PIPE_BUFFER_USAGE_CPU_WRITE) == 0) {
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/* Need to create new dst surface which is CPU writable */
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assert(dst->texture);
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if (!dst->texture)
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return;
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new_dst = screen->get_tex_surface(screen,
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dst->texture,
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dst->face,
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dst->level,
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dst->zslice,
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PIPE_BUFFER_USAGE_CPU_WRITE);
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dst = new_dst;
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}
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src_map = pipe->screen->surface_map(screen,
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src, PIPE_BUFFER_USAGE_CPU_READ);
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dst_map = pipe->screen->surface_map(screen,
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dst, PIPE_BUFFER_USAGE_CPU_WRITE);
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assert(src_map);
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assert(dst_map);
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if (src_map && dst_map) {
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/* If do_flip, invert src_y position and pass negative src stride */
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pipe_copy_rect(dst_map,
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&dst->block,
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dst->stride,
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dst_x, dst_y,
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w, h,
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src_map,
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do_flip ? -(int) src->stride : src->stride,
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src_x, src_y);
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}
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pipe->screen->surface_unmap(pipe->screen, src);
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pipe->screen->surface_unmap(pipe->screen, dst);
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if (new_src)
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screen->tex_surface_release(screen, &new_src);
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if (new_dst)
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screen->tex_surface_release(screen, &new_dst);
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}
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static void *
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get_pointer(struct pipe_surface *dst, void *dst_map, unsigned x, unsigned y)
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{
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return (char *)dst_map
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+ y / dst->block.height * dst->stride
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+ x / dst->block.width * dst->block.size;
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}
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#define UBYTE_TO_USHORT(B) ((B) | ((B) << 8))
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/**
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* Fallback for pipe->surface_fill() function.
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* XXX should probably put this in new u_surface.c file...
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*/
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void
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util_surface_fill(struct pipe_context *pipe,
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struct pipe_surface *dst,
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unsigned dstx, unsigned dsty,
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unsigned width, unsigned height, unsigned value)
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{
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struct pipe_screen *screen = pipe->screen;
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struct pipe_surface *new_dst = NULL;
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void *dst_map;
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if ((dst->usage & PIPE_BUFFER_USAGE_CPU_WRITE) == 0) {
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/* Need to create new dst surface which is CPU writable */
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assert(dst->texture);
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if (!dst->texture)
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return;
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new_dst = screen->get_tex_surface(screen,
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dst->texture,
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dst->face,
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dst->level,
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dst->zslice,
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PIPE_BUFFER_USAGE_CPU_WRITE);
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dst = new_dst;
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}
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dst_map = pipe->screen->surface_map(screen,
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dst, PIPE_BUFFER_USAGE_CPU_WRITE);
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assert(dst_map);
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if (dst_map) {
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assert(dst->stride > 0);
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switch (dst->block.size) {
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case 1:
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case 2:
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case 4:
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pipe_fill_rect(dst_map, &dst->block, dst->stride,
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dstx, dsty, width, height, value);
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break;
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case 8:
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{
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/* expand the 4-byte clear value to an 8-byte value */
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ushort *row = (ushort *) get_pointer(dst, dst_map, dstx, dsty);
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ushort val0 = UBYTE_TO_USHORT((value >> 0) & 0xff);
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ushort val1 = UBYTE_TO_USHORT((value >> 8) & 0xff);
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ushort val2 = UBYTE_TO_USHORT((value >> 16) & 0xff);
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ushort val3 = UBYTE_TO_USHORT((value >> 24) & 0xff);
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unsigned i, j;
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val0 = (val0 << 8) | val0;
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val1 = (val1 << 8) | val1;
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val2 = (val2 << 8) | val2;
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val3 = (val3 << 8) | val3;
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for (i = 0; i < height; i++) {
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for (j = 0; j < width; j++) {
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row[j*4+0] = val0;
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row[j*4+1] = val1;
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row[j*4+2] = val2;
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row[j*4+3] = val3;
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}
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row += dst->stride/2;
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}
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}
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break;
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default:
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assert(0);
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break;
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}
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}
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pipe->screen->surface_unmap(pipe->screen, dst);
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if (new_dst)
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screen->tex_surface_release(screen, &new_dst);
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}
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@ -37,6 +37,9 @@
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#include "pipe/p_format.h"
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struct pipe_context;
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struct pipe_surface;
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extern void
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pipe_copy_rect(ubyte * dst, const struct pipe_format_block *block,
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@ -50,5 +53,20 @@ pipe_fill_rect(ubyte * dst, const struct pipe_format_block *block,
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unsigned width, unsigned height, uint32_t value);
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extern void
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util_surface_copy(struct pipe_context *pipe,
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boolean do_flip,
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struct pipe_surface *dst,
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unsigned dst_x, unsigned dst_y,
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struct pipe_surface *src,
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unsigned src_x, unsigned src_y,
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unsigned w, unsigned h);
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extern void
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util_surface_fill(struct pipe_context *pipe,
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struct pipe_surface *dst,
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unsigned dstx, unsigned dsty,
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unsigned width, unsigned height, unsigned value);
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#endif /* U_RECT_H */
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