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util: Blit can now copy from texture to surface

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This commit is contained in:
Jakob Bornecrantz 2008-06-23 16:01:41 +02:00
parent 52501801c7
commit 708bb35194
2 changed files with 112 additions and 3 deletions
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101
src/gallium/auxiliary/util/u_blit.c
View file

@ -362,3 +362,104 @@ util_blit_pixels(struct blit_state *ctx,
screen->texture_release(screen, &tex);
}
/**
* Copy pixel block from src texture to dst surface.
* Overlapping regions are acceptable.
*
* XXX Should support selection of level.
* XXX need some control over blitting Z and/or stencil.
*/
void
util_blit_pixels_tex(struct blit_state *ctx,
struct pipe_texture *tex,
int srcX0, int srcY0,
int srcX1, int srcY1,
struct pipe_surface *dst,
int dstX0, int dstY0,
int dstX1, int dstY1,
float z, uint filter)
{
struct pipe_context *pipe = ctx->pipe;
struct pipe_screen *screen = pipe->screen;
struct pipe_framebuffer_state fb;
const int srcLeft = MIN2(srcX0, srcX1);
const int srcTop = MIN2(srcY0, srcY1);
assert(filter == PIPE_TEX_MIPFILTER_NEAREST ||
filter == PIPE_TEX_MIPFILTER_LINEAR);
if (srcLeft != srcX0) {
/* left-right flip */
int tmp = dstX0;
dstX0 = dstX1;
dstX1 = tmp;
}
if (srcTop != srcY0) {
/* up-down flip */
int tmp = dstY0;
dstY0 = dstY1;
dstY1 = tmp;
}
assert(screen->is_format_supported(screen, dst->format, PIPE_SURFACE));
/* save state (restored below) */
cso_save_blend(ctx->cso);
cso_save_depth_stencil_alpha(ctx->cso);
cso_save_rasterizer(ctx->cso);
cso_save_samplers(ctx->cso);
cso_save_sampler_textures(ctx->cso);
cso_save_framebuffer(ctx->cso);
cso_save_fragment_shader(ctx->cso);
cso_save_vertex_shader(ctx->cso);
cso_save_viewport(ctx->cso);
/* set misc state we care about */
cso_set_blend(ctx->cso, &ctx->blend);
cso_set_depth_stencil_alpha(ctx->cso, &ctx->depthstencil);
cso_set_rasterizer(ctx->cso, &ctx->rasterizer);
cso_set_viewport(ctx->cso, &ctx->viewport);
/* sampler */
ctx->sampler.min_img_filter = filter;
ctx->sampler.mag_img_filter = filter;
cso_single_sampler(ctx->cso, 0, &ctx->sampler);
cso_single_sampler_done(ctx->cso);
/* texture */
cso_set_sampler_textures(ctx->cso, 1, &tex);
/* shaders */
cso_set_fragment_shader_handle(ctx->cso, ctx->fs);
cso_set_vertex_shader_handle(ctx->cso, ctx->vs);
/* drawing dest */
memset(&fb, 0, sizeof(fb));
fb.width = dst->width;
fb.height = dst->height;
fb.num_cbufs = 1;
fb.cbufs[0] = dst;
cso_set_framebuffer(ctx->cso, &fb);
/* draw quad */
setup_vertex_data(ctx,
(float) dstX0, (float) dstY0,
(float) dstX1, (float) dstY1, z);
util_draw_vertex_buffer(ctx->pipe, ctx->vbuf,
PIPE_PRIM_TRIANGLE_FAN,
4, /* verts */
2); /* attribs/vert */
/* restore state we changed */
cso_restore_blend(ctx->cso);
cso_restore_depth_stencil_alpha(ctx->cso);
cso_restore_rasterizer(ctx->cso);
cso_restore_samplers(ctx->cso);
cso_restore_sampler_textures(ctx->cso);
cso_restore_framebuffer(ctx->cso);
cso_restore_fragment_shader(ctx->cso);
cso_restore_vertex_shader(ctx->cso);
cso_restore_viewport(ctx->cso);
}

14
src/gallium/auxiliary/util/u_blit.h
View file

@ -42,15 +42,13 @@ struct cso_context;
struct blit_state;
extern struct blit_state *
util_create_blit(struct pipe_context *pipe, struct cso_context *cso);
extern void
util_destroy_blit(struct blit_state *ctx);
extern void
util_blit_pixels(struct blit_state *ctx,
struct pipe_surface *src,
@ -61,6 +59,16 @@ util_blit_pixels(struct blit_state *ctx,
int dstX1, int dstY1,
float z, uint filter);
extern void
util_blit_pixels_tex(struct blit_state *ctx,
struct pipe_texture *tex,
int srcX0, int srcY0,
int srcX1, int srcY1,
struct pipe_surface *dst,
int dstX0, int dstY0,
int dstX1, int dstY1,
float z, uint filter);
#ifdef __cplusplus
}