u_blitter: add integer clear support

We need add a new set of fragment shader variants, along with new vertex
elements for signed and unsigned clears.

The new fragment shader variants are due to the integers values requiring
CONSTANT interpolation. The new vertex element descriptions are for passing
the clear color as an unsigned or signed integer value.

Signed-off-by: Dave Airlie <[email protected]>

2 files changed, 69 insertions, 21 deletions

diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index 1500aa4a759..1f8b6790398 100644
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -68,6 +68,7 @@ struct blitter_context_priv
    /* Fragment shaders. */
    /* The shader at index i outputs color to color buffers 0,1,...,i-1. */
    void *fs_col[PIPE_MAX_COLOR_BUFS+1];
+   void *fs_col_int[PIPE_MAX_COLOR_BUFS+1];
 
    /* FS which outputs a color from a texture,
       where the index is PIPE_TEXTURE_* to be sampled. */
@@ -88,6 +89,8 @@ struct blitter_context_priv
    void *dsa_keep_depth_write_stencil;
 
    void *velem_state;
+   void *velem_uint_state;
+   void *velem_sint_state;
 
    /* Sampler state for clamping to a miplevel. */
    void *sampler_state[PIPE_MAX_TEXTURE_LEVELS * 2];
@@ -208,6 +211,27 @@ struct blitter_context *util_blitter_create(struct pipe_context *pipe)
    }
    ctx->velem_state = pipe->create_vertex_elements_state(pipe, 2, &velem[0]);
 
+   memset(&velem[0], 0, sizeof(velem[0]) * 2);
+   for (i = 0; i < 2; i++) {
+      velem[i].src_offset = i * 4 * sizeof(float);
+      if (i == 0) {
+         velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+      } else {
+         velem[i].src_format = PIPE_FORMAT_R32G32B32A32_SINT;
+      }
+   }
+   ctx->velem_sint_state = pipe->create_vertex_elements_state(pipe, 2, &velem[0]);
+
+   memset(&velem[0], 0, sizeof(velem[0]) * 2);
+   for (i = 0; i < 2; i++) {
+      velem[i].src_offset = i * 4 * sizeof(float);
+      if (i == 0) {
+         velem[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
+      } else {
+         velem[i].src_format = PIPE_FORMAT_R32G32B32A32_UINT;
+      }
+   }
+   ctx->velem_uint_state = pipe->create_vertex_elements_state(pipe, 2, &velem[0]);
    /* fragment shaders are created on-demand */
 
    /* vertex shader */
@@ -250,6 +274,8 @@ void util_blitter_destroy(struct blitter_context *blitter)
    pipe->delete_rasterizer_state(pipe, ctx->rs_state);
    pipe->delete_vs_state(pipe, ctx->vs);
    pipe->delete_vertex_elements_state(pipe, ctx->velem_state);
+   pipe->delete_vertex_elements_state(pipe, ctx->velem_sint_state);
+   pipe->delete_vertex_elements_state(pipe, ctx->velem_uint_state);
 
    for (i = 0; i < PIPE_MAX_TEXTURE_TYPES; i++) {
       if (ctx->fs_texfetch_col[i])
@@ -258,9 +284,12 @@ void util_blitter_destroy(struct blitter_context *blitter)
          pipe->delete_fs_state(pipe, ctx->fs_texfetch_depth[i]);
    }
 
-   for (i = 0; i <= PIPE_MAX_COLOR_BUFS; i++)
+   for (i = 0; i <= PIPE_MAX_COLOR_BUFS; i++) {
       if (ctx->fs_col[i])
          pipe->delete_fs_state(pipe, ctx->fs_col[i]);
+      if (ctx->fs_col_int[i])
+         pipe->delete_fs_state(pipe, ctx->fs_col_int[i]);
+   }
 
    for (i = 0; i < PIPE_MAX_TEXTURE_LEVELS * 2; i++)
       if (ctx->sampler_state[i])
@@ -451,10 +480,11 @@ static void blitter_set_clear_color(struct blitter_context_priv *ctx,
 
    if (color) {
       for (i = 0; i < 4; i++) {
-         ctx->vertices[i][1][0] = color->f[0];
-         ctx->vertices[i][1][1] = color->f[1];
-         ctx->vertices[i][1][2] = color->f[2];
-         ctx->vertices[i][1][3] = color->f[3];
+         uint32_t *uiverts = (uint32_t *)ctx->vertices[i][1];
+         uiverts[0] = color->ui[0];
+         uiverts[1] = color->ui[1];
+         uiverts[2] = color->ui[2];
+         uiverts[3] = color->ui[3];
       }
    } else {
       for (i = 0; i < 4; i++) {
@@ -609,19 +639,28 @@ void **blitter_get_sampler_state(struct blitter_context_priv *ctx,
 }
 
 static INLINE
-void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs)
+void *blitter_get_fs_col(struct blitter_context_priv *ctx, unsigned num_cbufs,
+                         boolean int_format)
 {
    struct pipe_context *pipe = ctx->base.pipe;
 
    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 
-   if (!ctx->fs_col[num_cbufs])
-      ctx->fs_col[num_cbufs] =
-         util_make_fragment_cloneinput_shader(pipe, num_cbufs,
-                                              TGSI_SEMANTIC_GENERIC,
-                                              TGSI_INTERPOLATE_LINEAR);
-
-   return ctx->fs_col[num_cbufs];
+   if (int_format) {
+      if (!ctx->fs_col_int[num_cbufs])
+         ctx->fs_col_int[num_cbufs] =
+            util_make_fragment_cloneinput_shader(pipe, num_cbufs,
+                                                 TGSI_SEMANTIC_GENERIC,
+                                                 TGSI_INTERPOLATE_CONSTANT);
+      return ctx->fs_col_int[num_cbufs];
+   } else {
+      if (!ctx->fs_col[num_cbufs])
+         ctx->fs_col[num_cbufs] =
+            util_make_fragment_cloneinput_shader(pipe, num_cbufs,
+                                                 TGSI_SEMANTIC_GENERIC,
+                                                 TGSI_INTERPOLATE_LINEAR);
+      return ctx->fs_col[num_cbufs];
+   }
 }
 
 /** Convert PIPE_TEXTURE_x to TGSI_TEXTURE_x */
@@ -721,6 +760,7 @@ static void util_blitter_clear_custom(struct blitter_context *blitter,
                                       unsigned width, unsigned height,
                                       unsigned num_cbufs,
                                       unsigned clear_buffers,
+                                      enum pipe_format cbuf_format,
                                       const union pipe_color_union *color,
                                       double depth, unsigned stencil,
                                       void *custom_blend, void *custom_dsa)
@@ -728,7 +768,7 @@ static void util_blitter_clear_custom(struct blitter_context *blitter,
    struct blitter_context_priv *ctx = (struct blitter_context_priv*)blitter;
    struct pipe_context *pipe = ctx->base.pipe;
    struct pipe_stencil_ref sr = { { 0 } };
-
+   boolean int_format = util_format_is_pure_integer(cbuf_format);
    assert(num_cbufs <= PIPE_MAX_COLOR_BUFS);
 
    blitter_set_running_flag(ctx);
@@ -760,8 +800,14 @@ static void util_blitter_clear_custom(struct blitter_context *blitter,
    pipe->set_stencil_ref(pipe, &sr);
 
    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
-   pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
-   pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs));
+   if (util_format_is_pure_sint(cbuf_format)) {
+      pipe->bind_vertex_elements_state(pipe, ctx->velem_sint_state);
+   } else if (util_format_is_pure_uint(cbuf_format)) {
+      pipe->bind_vertex_elements_state(pipe, ctx->velem_uint_state);
+   } else {
+      pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
+   }
+   pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, num_cbufs, int_format));
    pipe->bind_vs_state(pipe, ctx->vs);
    if (ctx->has_geometry_shader)
       pipe->bind_gs_state(pipe, NULL);
@@ -779,11 +825,12 @@ void util_blitter_clear(struct blitter_context *blitter,
                         unsigned width, unsigned height,
                         unsigned num_cbufs,
                         unsigned clear_buffers,
+                        enum pipe_format cbuf_format,
                         const union pipe_color_union *color,
                         double depth, unsigned stencil)
 {
    util_blitter_clear_custom(blitter, width, height, num_cbufs,
-                             clear_buffers, color, depth, stencil,
+                             clear_buffers, cbuf_format, color, depth, stencil,
                              NULL, NULL);
 }
 
@@ -793,7 +840,7 @@ void util_blitter_clear_depth_custom(struct blitter_context *blitter,
 {
     static const union pipe_color_union color;
     util_blitter_clear_custom(blitter, width, height, 0,
-                              0, &color, depth, 0, NULL, custom_dsa);
+                              0, PIPE_FORMAT_NONE, &color, depth, 0, NULL, custom_dsa);
 }
 
 static
@@ -1010,7 +1057,7 @@ void util_blitter_clear_render_target(struct blitter_context *blitter,
    pipe->bind_blend_state(pipe, ctx->blend_write_color);
    pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
-   pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1));
+   pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 1, FALSE));
    pipe->bind_vs_state(pipe, ctx->vs);
    if (ctx->has_geometry_shader)
       pipe->bind_gs_state(pipe, NULL);
@@ -1078,7 +1125,7 @@ void util_blitter_clear_depth_stencil(struct blitter_context *blitter,
       pipe->bind_depth_stencil_alpha_state(pipe, ctx->dsa_keep_depth_stencil);
 
    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
-   pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 0));
+   pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 0, FALSE));
    pipe->bind_vs_state(pipe, ctx->vs);
    if (ctx->has_geometry_shader)
       pipe->bind_gs_state(pipe, NULL);
@@ -1127,7 +1174,7 @@ void util_blitter_custom_depth_stencil(struct blitter_context *blitter,
    pipe->bind_depth_stencil_alpha_state(pipe, dsa_stage);
 
    pipe->bind_rasterizer_state(pipe, ctx->rs_state);
-   pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 0));
+   pipe->bind_fs_state(pipe, blitter_get_fs_col(ctx, 0, FALSE));
    pipe->bind_vs_state(pipe, ctx->vs);
    if (ctx->has_geometry_shader)
       pipe->bind_gs_state(pipe, NULL);
diff --git a/src/gallium/auxiliary/util/u_blitter.h b/src/gallium/auxiliary/util/u_blitter.h
index d208ec38d01..798096e74df 100644
--- a/src/gallium/auxiliary/util/u_blitter.h
+++ b/src/gallium/auxiliary/util/u_blitter.h
@@ -147,6 +147,7 @@ void util_blitter_clear(struct blitter_context *blitter,
                         unsigned width, unsigned height,
                         unsigned num_cbufs,
                         unsigned clear_buffers,
+                        enum pipe_format cbuf_format,
                         const union pipe_color_union *color,
                         double depth, unsigned stencil);