radv: Use the guard band.

Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/amd/vulkan/radv_cmd_buffer.c b/src/amd/vulkan/radv_cmd_buffer.c
index 09ba7cf..e502452 100644 (file)
--- a/src/amd/vulkan/radv_cmd_buffer.c
+++ b/src/amd/vulkan/radv_cmd_buffer.c
@@ -750,7 +750,9 @@ radv_emit_scissor(struct radv_cmd_buffer *cmd_buffer)
 {
        uint32_t count = cmd_buffer->state.dynamic.scissor.count;
        si_write_scissors(cmd_buffer->cs, 0, count,
-                         cmd_buffer->state.dynamic.scissor.scissors);
+                         cmd_buffer->state.dynamic.scissor.scissors,
+                         cmd_buffer->state.dynamic.viewport.viewports,
+                         cmd_buffer->state.emitted_pipeline->graphics.can_use_guardband);
        radeon_set_context_reg(cmd_buffer->cs, R_028A48_PA_SC_MODE_CNTL_0,
                               cmd_buffer->state.pipeline->graphics.ms.pa_sc_mode_cntl_0 | S_028A48_VPORT_SCISSOR_ENABLE(count ? 1 : 0));
 }
@@ -1281,7 +1283,7 @@ radv_cmd_buffer_flush_state(struct radv_cmd_buffer *cmd_buffer,
        if (cmd_buffer->state.dirty & (RADV_CMD_DIRTY_DYNAMIC_VIEWPORT))
                radv_emit_viewport(cmd_buffer);
 
-       if (cmd_buffer->state.dirty & (RADV_CMD_DIRTY_DYNAMIC_SCISSOR))
+       if (cmd_buffer->state.dirty & (RADV_CMD_DIRTY_DYNAMIC_SCISSOR | RADV_CMD_DIRTY_DYNAMIC_VIEWPORT))
                radv_emit_scissor(cmd_buffer);
 
        ia_multi_vgt_param = si_get_ia_multi_vgt_param(cmd_buffer, instanced_draw, indirect_draw, draw_vertex_count);

diff --git a/src/amd/vulkan/radv_private.h b/src/amd/vulkan/radv_private.h
index 410e63b..e8f14dc 100644 (file)
--- a/src/amd/vulkan/radv_private.h
+++ b/src/amd/vulkan/radv_private.h
@@ -758,7 +758,8 @@ void cik_create_gfx_config(struct radv_device *device);
 void si_write_viewport(struct radeon_winsys_cs *cs, int first_vp,
                       int count, const VkViewport *viewports);
 void si_write_scissors(struct radeon_winsys_cs *cs, int first,
-                      int count, const VkRect2D *scissors);
+                      int count, const VkRect2D *scissors,
+                      const VkViewport *viewports, bool can_use_guardband);
 uint32_t si_get_ia_multi_vgt_param(struct radv_cmd_buffer *cmd_buffer,
                                   bool instanced_draw, bool indirect_draw,
                                   uint32_t draw_vertex_count);

diff --git a/src/amd/vulkan/si_cmd_buffer.c b/src/amd/vulkan/si_cmd_buffer.c
index 357b517..dbcd8e8 100644 (file)
--- a/src/amd/vulkan/si_cmd_buffer.c
+++ b/src/amd/vulkan/si_cmd_buffer.c
@@ -361,11 +361,6 @@ si_emit_config(struct radv_physical_device *physical_device,
        radeon_set_context_reg(cs, R_028234_PA_SU_HARDWARE_SCREEN_OFFSET, 0);
        radeon_set_context_reg(cs, R_028820_PA_CL_NANINF_CNTL, 0);
 
-       radeon_set_context_reg(cs, R_028BE8_PA_CL_GB_VERT_CLIP_ADJ, fui(1.0));
-       radeon_set_context_reg(cs, R_028BEC_PA_CL_GB_VERT_DISC_ADJ, fui(1.0));
-       radeon_set_context_reg(cs, R_028BF0_PA_CL_GB_HORZ_CLIP_ADJ, fui(1.0));
-       radeon_set_context_reg(cs, R_028BF4_PA_CL_GB_HORZ_DISC_ADJ, fui(1.0));
-
        radeon_set_context_reg(cs, R_028AC0_DB_SRESULTS_COMPARE_STATE0, 0x0);
        radeon_set_context_reg(cs, R_028AC4_DB_SRESULTS_COMPARE_STATE1, 0x0);
        radeon_set_context_reg(cs, R_028AC8_DB_PRELOAD_CONTROL, 0x0);
@@ -500,6 +495,22 @@ get_viewport_xform(const VkViewport *viewport,
        translate[2] = n;
 }
 
+static void
+get_viewport_xform_scissor(const VkRect2D *scissor,
+                           float scale[2], float translate[2])
+{
+       float x = scissor->offset.x;
+       float y = scissor->offset.y;
+       float half_width = 0.5f * scissor->extent.width;
+       float half_height = 0.5f * scissor->extent.height;
+
+       scale[0] = half_width;
+       translate[0] = half_width + x;
+       scale[1] = half_height;
+       translate[1] = half_height + y;
+
+}
+
 void
 si_write_viewport(struct radeon_winsys_cs *cs, int first_vp,
                   int count, const VkViewport *viewports)
@@ -533,21 +544,84 @@ si_write_viewport(struct radeon_winsys_cs *cs, int first_vp,
        }
 }
 
+static VkRect2D si_scissor_from_viewport(const VkViewport *viewport)
+{
+       float scale[3], translate[3];
+       VkRect2D rect;
+
+       get_viewport_xform(viewport, scale, translate);
+
+       rect.offset.x = translate[0] - abs(scale[0]);
+       rect.offset.y = translate[1] - abs(scale[1]);
+       rect.extent.width = ceilf(translate[0] + abs(scale[0])) - rect.offset.x;
+       rect.extent.height = ceilf(translate[1] + abs(scale[1])) - rect.offset.y;
+
+       return rect;
+}
+
+static VkRect2D si_intersect_scissor(const VkRect2D *a, const VkRect2D *b) {
+       VkRect2D ret;
+       ret.offset.x = MAX2(a->offset.x, b->offset.x);
+       ret.offset.y = MAX2(a->offset.y, b->offset.y);
+       ret.extent.width = MIN2(a->offset.x + a->extent.width,
+                               b->offset.x + b->extent.width) - ret.offset.x;
+       ret.extent.height = MIN2(a->offset.y + a->extent.height,
+                                b->offset.y + b->extent.height) - ret.offset.y;
+       return ret;
+}
+
+static VkRect2D si_union_scissor(const VkRect2D *a, const VkRect2D *b) {
+       VkRect2D ret;
+       ret.offset.x = MIN2(a->offset.x, b->offset.x);
+       ret.offset.y = MIN2(a->offset.y, b->offset.y);
+       ret.extent.width = MAX2(a->offset.x + a->extent.width,
+                               b->offset.x + b->extent.width) - ret.offset.x;
+       ret.extent.height = MAX2(a->offset.y + a->extent.height,
+                                b->offset.y + b->extent.height) - ret.offset.y;
+       return ret;
+}
+
+
 void
 si_write_scissors(struct radeon_winsys_cs *cs, int first,
-                  int count, const VkRect2D *scissors)
+                  int count, const VkRect2D *scissors,
+                  const VkViewport *viewports, bool can_use_guardband)
 {
        int i;
+       VkRect2D merged;
+       float scale[2], translate[2], guardband_x = 1.0, guardband_y = 1.0;
+       const float max_range = 32767.0f;
        assert(count);
 
        radeon_set_context_reg_seq(cs, R_028250_PA_SC_VPORT_SCISSOR_0_TL + first * 4 * 2, count * 2);
        for (i = 0; i < count; i++) {
-               radeon_emit(cs, S_028250_TL_X(scissors[i].offset.x) |
-                           S_028250_TL_Y(scissors[i].offset.y) |
+               VkRect2D viewport_scissor = si_scissor_from_viewport(viewports + i);
+               VkRect2D scissor = si_intersect_scissor(&scissors[i], &viewport_scissor);
+
+               if (i)
+                       merged = si_union_scissor(&merged, &scissor);
+               else
+                       merged = scissor;
+
+               radeon_emit(cs, S_028250_TL_X(scissor.offset.x) |
+                           S_028250_TL_Y(scissor.offset.y) |
                            S_028250_WINDOW_OFFSET_DISABLE(1));
-               radeon_emit(cs, S_028254_BR_X(scissors[i].offset.x + scissors[i].extent.width) |
-                           S_028254_BR_Y(scissors[i].offset.y + scissors[i].extent.height));
+               radeon_emit(cs, S_028254_BR_X(scissor.offset.x + scissor.extent.width) |
+                           S_028254_BR_Y(scissor.offset.y + scissor.extent.height));
        }
+
+       get_viewport_xform_scissor(&merged, scale, translate);
+
+       if (can_use_guardband) {
+               guardband_x = (max_range - abs(translate[0])) / scale[0];
+               guardband_y = (max_range - abs(translate[1])) / scale[1];
+       }
+
+       radeon_set_context_reg_seq(cs, R_028BE8_PA_CL_GB_VERT_CLIP_ADJ, 4);
+       radeon_emit(cs, fui(guardband_x));
+       radeon_emit(cs, fui(1.0));
+       radeon_emit(cs, fui(guardband_y));
+       radeon_emit(cs, fui(1.0));
 }
 
 static inline unsigned