From 21a27ad9569211e48cfd7ad60ac4025ab9f96a7a Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Fri, 9 Sep 2016 16:26:02 -0700 Subject: [PATCH] vc4: Fix incorrect clearing of Z/stencil when cleared separately. The clear of Z or stencil will end up clearing the other as well, instead of masking. There's no way around this that I know of, so if we are clearing just one then we need to draw a quad. Fixes a regression in the job-shuffling code, where the clear values move to the job and don't just have the last clear's value laying around when you do glClear(DEPTH) and then glClear(STENCIL) separately (ext_framebuffer_multisample-clear 4 depth)). This causes regressions in ext_framebuffer_multisample/multisample-blit depth and ext_framebuffer_multisample/no-color depth, but these were formerly false positives due to the reference image also being black. Now the reference and test images are both being drawn, and it looks like there's an incorrect resolve of depth during blitting to an MSAA FBO. --- src/gallium/drivers/vc4/vc4_blit.c | 27 ++++++++++++++++----------- src/gallium/drivers/vc4/vc4_context.h | 1 + src/gallium/drivers/vc4/vc4_draw.c | 25 +++++++++++++++++++++---- 3 files changed, 38 insertions(+), 15 deletions(-) diff --git a/src/gallium/drivers/vc4/vc4_blit.c b/src/gallium/drivers/vc4/vc4_blit.c index 029170a..c373544 100644 --- a/src/gallium/drivers/vc4/vc4_blit.c +++ b/src/gallium/drivers/vc4/vc4_blit.c @@ -166,18 +166,9 @@ vc4_tile_blit(struct pipe_context *pctx, const struct pipe_blit_info *info) return true; } -static bool -vc4_render_blit(struct pipe_context *ctx, struct pipe_blit_info *info) +void +vc4_blitter_save(struct vc4_context *vc4) { - struct vc4_context *vc4 = vc4_context(ctx); - - if (!util_blitter_is_blit_supported(vc4->blitter, info)) { - fprintf(stderr, "blit unsupported %s -> %s\n", - util_format_short_name(info->src.resource->format), - util_format_short_name(info->dst.resource->format)); - return false; - } - util_blitter_save_vertex_buffer_slot(vc4->blitter, vc4->vertexbuf.vb); util_blitter_save_vertex_elements(vc4->blitter, vc4->vtx); util_blitter_save_vertex_shader(vc4->blitter, vc4->prog.bind_vs); @@ -195,7 +186,21 @@ vc4_render_blit(struct pipe_context *ctx, struct pipe_blit_info *info) (void **)vc4->fragtex.samplers); util_blitter_save_fragment_sampler_views(vc4->blitter, vc4->fragtex.num_textures, vc4->fragtex.textures); +} + +static bool +vc4_render_blit(struct pipe_context *ctx, struct pipe_blit_info *info) +{ + struct vc4_context *vc4 = vc4_context(ctx); + + if (!util_blitter_is_blit_supported(vc4->blitter, info)) { + fprintf(stderr, "blit unsupported %s -> %s\n", + util_format_short_name(info->src.resource->format), + util_format_short_name(info->dst.resource->format)); + return false; + } + vc4_blitter_save(vc4); util_blitter_blit(vc4->blitter, info); return true; diff --git a/src/gallium/drivers/vc4/vc4_context.h b/src/gallium/drivers/vc4/vc4_context.h index ce2c6d4..d02a971 100644 --- a/src/gallium/drivers/vc4/vc4_context.h +++ b/src/gallium/drivers/vc4/vc4_context.h @@ -415,4 +415,5 @@ uint8_t vc4_get_tex_format(enum pipe_format f); const uint8_t *vc4_get_format_swizzle(enum pipe_format f); void vc4_init_query_functions(struct vc4_context *vc4); void vc4_blit(struct pipe_context *pctx, const struct pipe_blit_info *blit_info); +void vc4_blitter_save(struct vc4_context *vc4); #endif /* VC4_CONTEXT_H */ diff --git a/src/gallium/drivers/vc4/vc4_draw.c b/src/gallium/drivers/vc4/vc4_draw.c index 773caf7..9770abf 100644 --- a/src/gallium/drivers/vc4/vc4_draw.c +++ b/src/gallium/drivers/vc4/vc4_draw.c @@ -22,6 +22,7 @@ * IN THE SOFTWARE. */ +#include "util/u_blitter.h" #include "util/u_prim.h" #include "util/u_format.h" #include "util/u_pack_color.h" @@ -468,21 +469,37 @@ vc4_clear(struct pipe_context *pctx, unsigned buffers, vc4_flush(pctx); } + /* Clearing ZS will clear both Z and stencil, so if we're trying to + * clear just one then we need to draw a quad to do it instead. + */ + if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) != 0 && + (buffers & PIPE_CLEAR_DEPTHSTENCIL) != PIPE_CLEAR_DEPTHSTENCIL && + util_format_is_depth_and_stencil(vc4->framebuffer.zsbuf->format)) { + vc4_blitter_save(vc4); + util_blitter_clear(vc4->blitter, + vc4->framebuffer.width, + vc4->framebuffer.height, + 1, + buffers & PIPE_CLEAR_DEPTHSTENCIL, + NULL, depth, stencil); + buffers &= ~PIPE_CLEAR_DEPTHSTENCIL; + if (!buffers) + return; + } + if (buffers & PIPE_CLEAR_COLOR0) { vc4->clear_color[0] = vc4->clear_color[1] = pack_rgba(vc4->framebuffer.cbufs[0]->format, color->f); } - if (buffers & PIPE_CLEAR_DEPTH) { + if (buffers & PIPE_CLEAR_DEPTHSTENCIL) { /* Though the depth buffer is stored with Z in the high 24, * for this field we just need to store it in the low 24. */ vc4->clear_depth = util_pack_z(PIPE_FORMAT_Z24X8_UNORM, depth); - } - - if (buffers & PIPE_CLEAR_STENCIL) vc4->clear_stencil = stencil; + } vc4->draw_min_x = 0; vc4->draw_min_y = 0; -- 2.7.4