softpipe: implement blend color clamping
[mesa.git] / src / gallium / drivers / softpipe / sp_screen.c
index 52ccb32530c9b7e3648cc07a629ab7b2ffb400ad..54bcf657eb145a8185de31cab8376e03e985aa84 100644 (file)
@@ -1,8 +1,8 @@
 /**************************************************************************
- * 
+ *
  * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
  * All Rights Reserved.
- * 
+ *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the
  * "Software"), to deal in the Software without restriction, including
  * distribute, sub license, and/or sell copies of the Software, and to
  * permit persons to whom the Software is furnished to do so, subject to
  * the following conditions:
- * 
+ *
  * The above copyright notice and this permission notice (including the
  * next paragraph) shall be included in all copies or substantial portions
  * of the Software.
- * 
+ *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- * 
+ *
  **************************************************************************/
 
 
 #include "util/u_memory.h"
+#include "util/u_format.h"
 #include "util/u_format_s3tc.h"
+#include "util/u_video.h"
 #include "pipe/p_defines.h"
 #include "pipe/p_screen.h"
+#include "draw/draw_context.h"
+#include "vl/vl_decoder.h"
+#include "vl/vl_video_buffer.h"
 
 #include "state_tracker/sw_winsys.h"
+#include "tgsi/tgsi_exec.h"
 
 #include "sp_texture.h"
 #include "sp_screen.h"
@@ -55,13 +61,18 @@ softpipe_get_name(struct pipe_screen *screen)
 
 
 static int
-softpipe_get_param(struct pipe_screen *screen, int param)
+softpipe_get_param(struct pipe_screen *screen, enum pipe_cap param)
 {
    switch (param) {
    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
       return PIPE_MAX_SAMPLERS;
    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
+#ifdef HAVE_LLVM
+      /* Softpipe doesn't yet know how to tell draw/llvm about textures */
+      return 0;
+#else
       return PIPE_MAX_VERTEX_SAMPLERS;
+#endif
    case PIPE_CAP_MAX_COMBINED_SAMPLERS:
       return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
    case PIPE_CAP_NPOT_TEXTURES:
@@ -70,34 +81,34 @@ softpipe_get_param(struct pipe_screen *screen, int param)
       return 1;
    case PIPE_CAP_GLSL:
       return 1;
+   case PIPE_CAP_SM3:
+      return 1;
    case PIPE_CAP_ANISOTROPIC_FILTER:
-      return 0;
+      return 1;
    case PIPE_CAP_POINT_SPRITE:
       return 1;
    case PIPE_CAP_MAX_RENDER_TARGETS:
       return PIPE_MAX_COLOR_BUFS;
    case PIPE_CAP_OCCLUSION_QUERY:
       return 1;
+   case PIPE_CAP_TIMER_QUERY:
+      return 1;
    case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
       return 1;
    case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
       return 1;
    case PIPE_CAP_TEXTURE_SHADOW_MAP:
       return 1;
+   case PIPE_CAP_TEXTURE_SWIZZLE:
+      return 1;
    case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
       return SP_MAX_TEXTURE_2D_LEVELS;
    case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
       return SP_MAX_TEXTURE_3D_LEVELS;
    case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
       return SP_MAX_TEXTURE_2D_LEVELS;
-   case PIPE_CAP_TGSI_CONT_SUPPORTED:
-      return 1;
    case PIPE_CAP_BLEND_EQUATION_SEPARATE:
       return 1;
-   case PIPE_CAP_MAX_CONST_BUFFERS:
-      return PIPE_MAX_CONSTANT_BUFFERS;
-   case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
-      return 4096 * 4 * sizeof(float);
    case PIPE_CAP_INDEP_BLEND_ENABLE:
       return 1;
    case PIPE_CAP_INDEP_BLEND_FUNC:
@@ -107,14 +118,45 @@ softpipe_get_param(struct pipe_screen *screen, int param)
    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
    case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
       return 1;
+   case PIPE_CAP_STREAM_OUTPUT:
+      return 1;
+   case PIPE_CAP_PRIMITIVE_RESTART:
+      return 1;
+   case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE:
+      return 0;
+   case PIPE_CAP_SHADER_STENCIL_EXPORT:
+      return 1;
+   case PIPE_CAP_TGSI_INSTANCEID:
+   case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
+      return 1;
+   case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
+      return 64; /* matches core Mesa defaults */
+   case PIPE_CAP_MIN_TEXEL_OFFSET:
+      return -8;
+   case PIPE_CAP_MAX_TEXEL_OFFSET:
+      return 7;
    default:
       return 0;
    }
 }
 
+static int
+softpipe_get_shader_param(struct pipe_screen *screen, unsigned shader, enum pipe_shader_cap param)
+{
+   switch(shader)
+   {
+   case PIPE_SHADER_FRAGMENT:
+      return tgsi_exec_get_shader_param(param);
+   case PIPE_SHADER_VERTEX:
+   case PIPE_SHADER_GEOMETRY:
+      return draw_get_shader_param(shader, param);
+   default:
+      return 0;
+   }
+}
 
 static float
-softpipe_get_paramf(struct pipe_screen *screen, int param)
+softpipe_get_paramf(struct pipe_screen *screen, enum pipe_cap param)
 {
    switch (param) {
    case PIPE_CAP_MAX_LINE_WIDTH:
@@ -126,7 +168,7 @@ softpipe_get_paramf(struct pipe_screen *screen, int param)
    case PIPE_CAP_MAX_POINT_WIDTH_AA:
       return 255.0; /* arbitrary */
    case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
-      return 16.0; /* not actually signficant at this time */
+      return 16.0;
    case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
       return 16.0; /* arbitrary */
    default:
@@ -134,6 +176,25 @@ softpipe_get_paramf(struct pipe_screen *screen, int param)
    }
 }
 
+static int
+softpipe_get_video_param(struct pipe_screen *screen,
+                         enum pipe_video_profile profile,
+                         enum pipe_video_cap param)
+{
+   switch (param) {
+   case PIPE_VIDEO_CAP_SUPPORTED:
+       return vl_profile_supported(screen, profile);
+   case PIPE_VIDEO_CAP_NPOT_TEXTURES:
+      return 0;
+   case PIPE_VIDEO_CAP_MAX_WIDTH:
+   case PIPE_VIDEO_CAP_MAX_HEIGHT:
+      return vl_video_buffer_max_size(screen);
+   case PIPE_VIDEO_CAP_NUM_BUFFERS_DESIRED:
+      return vl_num_buffers_desired(screen, profile);
+   default:
+      return 0;
+   }
+}
 
 /**
  * Query format support for creating a texture, drawing surface, etc.
@@ -142,41 +203,79 @@ softpipe_get_paramf(struct pipe_screen *screen, int param)
  */
 static boolean
 softpipe_is_format_supported( struct pipe_screen *screen,
-                              enum pipe_format format, 
+                              enum pipe_format format,
                               enum pipe_texture_target target,
-                              unsigned tex_usage, 
-                              unsigned geom_flags )
+                              unsigned sample_count,
+                              unsigned bind)
 {
    struct sw_winsys *winsys = softpipe_screen(screen)->winsys;
+   const struct util_format_description *format_desc;
 
-   assert(target == PIPE_TEXTURE_1D ||
+   assert(target == PIPE_BUFFER ||
+          target == PIPE_TEXTURE_1D ||
+          target == PIPE_TEXTURE_1D_ARRAY ||
           target == PIPE_TEXTURE_2D ||
+          target == PIPE_TEXTURE_2D_ARRAY ||
+          target == PIPE_TEXTURE_RECT ||
           target == PIPE_TEXTURE_3D ||
           target == PIPE_TEXTURE_CUBE);
 
-   switch(format) {
-   case PIPE_FORMAT_DXT1_RGB:
-   case PIPE_FORMAT_DXT1_RGBA:
-   case PIPE_FORMAT_DXT3_RGBA:
-   case PIPE_FORMAT_DXT5_RGBA:
-      return util_format_s3tc_enabled;
+   format_desc = util_format_description(format);
+   if (!format_desc)
+      return FALSE;
 
-   case PIPE_FORMAT_Z32_FLOAT:
-   case PIPE_FORMAT_NONE:
+   if (sample_count > 1)
       return FALSE;
 
-   default:
-      break;
+   if (bind & (PIPE_BIND_DISPLAY_TARGET |
+               PIPE_BIND_SCANOUT |
+               PIPE_BIND_SHARED)) {
+      if(!winsys->is_displaytarget_format_supported(winsys, bind, format))
+         return FALSE;
+   }
+
+   if (bind & PIPE_BIND_RENDER_TARGET) {
+      if (format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS)
+         return FALSE;
+
+      /*
+       * Although possible, it is unnatural to render into compressed or YUV
+       * surfaces. So disable these here to avoid going into weird paths
+       * inside the state trackers.
+       */
+      if (format_desc->block.width != 1 ||
+          format_desc->block.height != 1)
+         return FALSE;
    }
 
-   if(tex_usage & (PIPE_BIND_DISPLAY_TARGET |
-                   PIPE_BIND_SCANOUT |
-                   PIPE_BIND_SHARED)) {
-      if(!winsys->is_displaytarget_format_supported(winsys, tex_usage, format))
+   if (bind & PIPE_BIND_DEPTH_STENCIL) {
+      if (format_desc->colorspace != UTIL_FORMAT_COLORSPACE_ZS)
+         return FALSE;
+
+      /*
+       * TODO: Unfortunately we cannot render into anything more than 32 bits
+       * because we encode depth and stencil clear values into a 32bit word.
+       */
+      if (format_desc->block.bits > 32)
+         return FALSE;
+
+      /*
+       * TODO: eliminate this restriction
+       */
+      if (format == PIPE_FORMAT_Z32_FLOAT)
          return FALSE;
    }
 
-   /* XXX: this is often a lie.  Pull in logic from llvmpipe to fix.
+   /*
+    * All other operations (sampling, transfer, etc).
+    */
+
+   if (format_desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
+      return util_format_s3tc_enabled;
+   }
+
+   /*
+    * Everything else should be supported by u_format.
     */
    return TRUE;
 }
@@ -199,12 +298,13 @@ softpipe_destroy_screen( struct pipe_screen *screen )
  */
 static void
 softpipe_flush_frontbuffer(struct pipe_screen *_screen,
-                           struct pipe_surface *surface,
+                           struct pipe_resource *resource,
+                           unsigned level, unsigned layer,
                            void *context_private)
 {
    struct softpipe_screen *screen = softpipe_screen(_screen);
    struct sw_winsys *winsys = screen->winsys;
-   struct softpipe_resource *texture = softpipe_resource(surface->texture);
+   struct softpipe_resource *texture = softpipe_resource(resource);
 
    assert(texture->dt);
    if (texture->dt)
@@ -231,8 +331,11 @@ softpipe_create_screen(struct sw_winsys *winsys)
    screen->base.get_name = softpipe_get_name;
    screen->base.get_vendor = softpipe_get_vendor;
    screen->base.get_param = softpipe_get_param;
+   screen->base.get_shader_param = softpipe_get_shader_param;
    screen->base.get_paramf = softpipe_get_paramf;
+   screen->base.get_video_param = softpipe_get_video_param;
    screen->base.is_format_supported = softpipe_is_format_supported;
+   screen->base.is_video_format_supported = vl_video_buffer_is_format_supported;
    screen->base.context_create = softpipe_create_context;
    screen->base.flush_frontbuffer = softpipe_flush_frontbuffer;