renderer: ABI break: overhaul viewport/scissor state

add support for multiple viewports, and reduce
viewport size.

src/gallium/include/pipe/p_state.h

@@ -166,8 +166,8 @@ struct pipe_poly_stipple
 
 struct pipe_viewport_state
 {
-   float scale[4];
-   float translate[4];
+   float scale[3];
+   float translate[3];
 };
 
 

src/virgl_hw.h

@@ -220,6 +220,7 @@ struct virgl_caps_v1 {
         uint32_t prim_mask;
         uint32_t max_tbo_size;
         uint32_t max_uniform_blocks;
+        uint32_t max_viewports;
 };
 
 union virgl_caps {

src/virgl_protocol.h

@@ -198,15 +198,14 @@ enum virgl_context_cmd {
 #define VIRGL_OBJ_SHADER_SO_OUTPUT_DST_OFFSET(x) (((x) & 0xffff) << 16)
 
 /* viewport state */
-#define VIRGL_SET_VIEWPORT_STATE_SIZE 8
-#define VIRGL_SET_VIEWPORT_STATE_SCALE_0 1
-#define VIRGL_SET_VIEWPORT_STATE_SCALE_1 2
-#define VIRGL_SET_VIEWPORT_STATE_SCALE_2 3 
-#define VIRGL_SET_VIEWPORT_STATE_SCALE_3 4
-#define VIRGL_SET_VIEWPORT_STATE_TRANSLATE_0 5
-#define VIRGL_SET_VIEWPORT_STATE_TRANSLATE_1 6
-#define VIRGL_SET_VIEWPORT_STATE_TRANSLATE_2 7 
-#define VIRGL_SET_VIEWPORT_STATE_TRANSLATE_3 8
+#define VIRGL_SET_VIEWPORT_STATE_SIZE(num_viewports) ((6 * num_viewports) + 1)
+#define VIRGL_SET_VIEWPORT_START_SLOT 1
+#define VIRGL_SET_VIEWPORT_STATE_SCALE_0(x) (2 + (x * 6))
+#define VIRGL_SET_VIEWPORT_STATE_SCALE_1(x) (3 + (x * 6))
+#define VIRGL_SET_VIEWPORT_STATE_SCALE_2(x) (4 + (x * 6))
+#define VIRGL_SET_VIEWPORT_STATE_TRANSLATE_0(x) (5 + (x * 6))
+#define VIRGL_SET_VIEWPORT_STATE_TRANSLATE_1(x) (6 + (x * 6))
+#define VIRGL_SET_VIEWPORT_STATE_TRANSLATE_2(x) (7 + (x * 6))
 
 /* framebuffer state */
 #define VIRGL_SET_FRAMEBUFFER_STATE_SIZE(nr_cbufs) (nr_cbufs + 2)
@@ -333,9 +332,10 @@ enum virgl_context_cmd {
 #define VIRGL_SET_BLEND_COLOR(x) ((x) + 1)
 
 /* set scissor state */
-#define VIRGL_SET_SCISSOR_STATE_SIZE 2
-#define VIRGL_SET_SCISSOR_MINX_MINY 1
-#define VIRGL_SET_SCISSOR_MAXX_MAXY 2
+#define VIRGL_SET_SCISSOR_STATE_SIZE(x) (1 + 2 * x)
+#define VIRGL_SET_SCISSOR_START_SLOT 1
+#define VIRGL_SET_SCISSOR_MINX_MINY(x) (2 + (x * 2))
+#define VIRGL_SET_SCISSOR_MAXX_MAXY(x) (3 + (x * 3))
 
 /* resource copy region */
 #define VIRGL_CMD_RESOURCE_COPY_REGION_SIZE 13

src/vrend_decode.c

@@ -187,18 +187,28 @@ static float uif(unsigned int ui)
 
 static int vrend_decode_set_viewport_state(struct vrend_decode_ctx *ctx, int length)
 {
-   struct pipe_viewport_state vps;
-   int i;
+   struct pipe_viewport_state vps[PIPE_MAX_VIEWPORTS];
+   int i, v;
+   int num_viewports, start_slot;
+   if (length < 1)
+      return EINVAL;
 
-   if (length != VIRGL_SET_VIEWPORT_STATE_SIZE)
+   if ((length - 1) % 6)
       return EINVAL;
 
-   for (i = 0; i < 4; i++)
-      vps.scale[i] = uif(get_buf_entry(ctx, VIRGL_SET_VIEWPORT_STATE_SCALE_0 + i));
-   for (i = 0; i < 4; i++)
-      vps.translate[i] = uif(get_buf_entry(ctx, VIRGL_SET_VIEWPORT_STATE_TRANSLATE_0 + i));
+   num_viewports = (length - 1) / 6;
+   if (num_viewports > PIPE_MAX_VIEWPORTS)
+      return EINVAL;
+
+   start_slot = get_buf_entry(ctx, VIRGL_SET_VIEWPORT_START_SLOT);
+   for (v = 0; v < num_viewports; v++) {
+      for (i = 0; i < 3; i++)
+	 vps[v].scale[i] = uif(get_buf_entry(ctx, VIRGL_SET_VIEWPORT_STATE_SCALE_0(v) + i));
+      for (i = 0; i < 3; i++)
+	 vps[v].translate[i] = uif(get_buf_entry(ctx, VIRGL_SET_VIEWPORT_STATE_TRANSLATE_0(v) + i));
+   }
    
-   vrend_set_viewport_state(ctx->grctx, &vps);
+   vrend_set_viewport_states(ctx->grctx, start_slot, num_viewports, vps);
    return 0;
 }
 
@@ -748,21 +758,33 @@ static int vrend_decode_set_blend_color(struct vrend_decode_ctx *ctx, int length
 
 static int vrend_decode_set_scissor_state(struct vrend_decode_ctx *ctx, int length)
 {
-   struct pipe_scissor_state ss;
+   struct pipe_scissor_state ss[PIPE_MAX_VIEWPORTS];
    uint32_t temp;
+   int num_scissor, start_slot;
+   int s;
+   if (length < 1)
+      return EINVAL;
 
-   if (length != VIRGL_SET_SCISSOR_STATE_SIZE)
+   if ((length - 1) % 2)
       return EINVAL;
 
-   temp = get_buf_entry(ctx, VIRGL_SET_SCISSOR_MINX_MINY);
-   ss.minx = temp & 0xffff;
-   ss.miny = (temp >> 16) & 0xffff;
+   num_scissor = (length - 1) / 2;
+   if (num_scissor > PIPE_MAX_VIEWPORTS)
+      return EINVAL;
 
-   temp = get_buf_entry(ctx, VIRGL_SET_SCISSOR_MAXX_MAXY);
-   ss.maxx = temp & 0xffff;
-   ss.maxy = (temp >> 16) & 0xffff;
+   start_slot = get_buf_entry(ctx, VIRGL_SET_SCISSOR_START_SLOT);
+
+   for (s = 0; s < num_scissor; s++) {
+      temp = get_buf_entry(ctx, VIRGL_SET_SCISSOR_MINX_MINY(s));
+      ss[s].minx = temp & 0xffff;
+      ss[s].miny = (temp >> 16) & 0xffff;
+
+      temp = get_buf_entry(ctx, VIRGL_SET_SCISSOR_MAXX_MAXY(s));
+      ss[s].maxx = temp & 0xffff;
+      ss[s].maxy = (temp >> 16) & 0xffff;
+   }
 
-   vrend_set_scissor_state(ctx->grctx, &ss);
+   vrend_set_scissor_state(ctx->grctx, &ss[0]);
    return 0;
 }
 

src/vrend_renderer.c

@@ -1331,8 +1331,10 @@ void vrend_set_framebuffer_state(struct vrend_context *ctx,
  * if the viewport Y scale factor is > 0 then we are rendering to
  * an FBO already so don't need to invert rendering?
  */
-void vrend_set_viewport_state(struct vrend_context *ctx,
-                              const struct pipe_viewport_state *state)
+void vrend_set_viewport_states(struct vrend_context *ctx,
+			       int start_slots,
+			       int num_viewports,
+			       const struct pipe_viewport_state *state)
 {
    /* convert back to glViewport */
    GLint x, y;
@@ -5204,6 +5206,9 @@ void vrend_renderer_fill_caps(uint32_t set, uint32_t version,
       caps->v1.max_tbo_size = max;
    }
 
+   /* initial support */
+   caps->v1.max_viewports = 1;
+
    caps->v1.prim_mask = (1 << PIPE_PRIM_POINTS) | (1 << PIPE_PRIM_LINES) | (1 << PIPE_PRIM_LINE_STRIP) | (1 << PIPE_PRIM_LINE_LOOP) | (1 << PIPE_PRIM_TRIANGLES) | (1 << PIPE_PRIM_TRIANGLE_STRIP) | (1 << PIPE_PRIM_TRIANGLE_FAN);
    if (use_core_profile == 0) {
       caps->v1.prim_mask |= (1 << PIPE_PRIM_QUADS) | (1 << PIPE_PRIM_QUAD_STRIP) | (1 << PIPE_PRIM_POLYGON);

src/vrend_renderer.h

@@ -213,8 +213,9 @@ int vrend_transfer_inline_write(struct vrend_context *ctx,
 				struct vrend_transfer_info *info,
 				unsigned usage);
 
-void vrend_set_viewport_state(struct vrend_context *ctx,
-                              const struct pipe_viewport_state *state);
+void vrend_set_viewport_states(struct vrend_context *ctx,
+			       int start_slot, int num_viewports,
+			       const struct pipe_viewport_state *state);
 void vrend_set_num_sampler_views(struct vrend_context *ctx,
                                  uint32_t shader_type,
                                  uint32_t start_slot,

tests/testvirgl_encode.c

@@ -278,10 +278,11 @@ int virgl_encoder_set_viewport_state(struct virgl_context *ctx,
 				    const struct pipe_viewport_state *state)
 {
    int i;
-   virgl_encoder_write_cmd_dword(ctx, VIRGL_CMD0(VIRGL_CCMD_SET_VIEWPORT_STATE, 0, VIRGL_SET_VIEWPORT_STATE_SIZE));
-   for (i = 0; i < 4; i++)
+   virgl_encoder_write_cmd_dword(ctx, VIRGL_CMD0(VIRGL_CCMD_SET_VIEWPORT_STATE, 0, VIRGL_SET_VIEWPORT_STATE_SIZE(1)));
+   virgl_encoder_write_dword(ctx->cbuf, 0);
+   for (i = 0; i < 3; i++)
       virgl_encoder_write_dword(ctx->cbuf, fui(state->scale[i]));
-   for (i = 0; i < 4; i++)
+   for (i = 0; i < 3; i++)
       virgl_encoder_write_dword(ctx->cbuf, fui(state->translate[i]));
    return 0;
 }
@@ -640,11 +641,17 @@ int virgl_encoder_set_blend_color(struct virgl_context *ctx,
 }
 
 int virgl_encoder_set_scissor_state(struct virgl_context *ctx,
+				    int start_slot,
+				    int num_scissors,
                                    const struct pipe_scissor_state *ss)
 {
-   virgl_encoder_write_cmd_dword(ctx, VIRGL_CMD0(VIRGL_CCMD_SET_SCISSOR_STATE, 0, VIRGL_SET_SCISSOR_STATE_SIZE));
-   virgl_encoder_write_dword(ctx->cbuf, (ss->minx | ss->miny << 16));
-   virgl_encoder_write_dword(ctx->cbuf, (ss->maxx | ss->maxy << 16));
+   int s;
+   virgl_encoder_write_cmd_dword(ctx, VIRGL_CMD0(VIRGL_CCMD_SET_SCISSOR_STATE, 0, VIRGL_SET_SCISSOR_STATE_SIZE(num_scissors)));
+   virgl_encoder_write_dword(ctx->cbuf, start_slot);
+   for (s = 0; s < num_scissors; s++) {
+      virgl_encoder_write_dword(ctx->cbuf, (ss[s].minx | ss[s].miny << 16));
+      virgl_encoder_write_dword(ctx->cbuf, (ss[s].maxx | ss[s].maxy << 16));
+   }
    return 0;
 }
 

tests/testvirgl_encode.h

@@ -159,7 +159,9 @@ int virgl_encoder_set_blend_color(struct virgl_context *ctx,
                                  const struct pipe_blend_color *color);
 
 int virgl_encoder_set_scissor_state(struct virgl_context *ctx,
-                                   const struct pipe_scissor_state *ss);
+				    int start_slot,
+				    int num_scissors,
+				    const struct pipe_scissor_state *ss);
 
 void virgl_encoder_set_polygon_stipple(struct virgl_context *ctx,
                                       const struct pipe_poly_stipple *ps);