ilo: replace a boolean by bool

[mesa.git] / src / gallium / drivers / ilo / ilo_format.h

diff --git a/src/gallium/drivers/ilo/ilo_format.h b/src/gallium/drivers/ilo/ilo_format.h
index a1f76382290b38ced6b4c7dcb496b3578dd841ae..23dcbc550f3bbd2d6ad0acd10eabb4fad0db57dd 100644 (file)
--- a/src/gallium/drivers/ilo/ilo_format.h
+++ b/src/gallium/drivers/ilo/ilo_format.h
@@ -28,6 +28,8 @@
 #ifndef ILO_FORMAT_H
 #define ILO_FORMAT_H
 
+#include "brw_defines.h"
+
 #include "ilo_common.h"
 
 struct ilo_screen;
@@ -35,4 +37,106 @@ struct ilo_screen;
 void
 ilo_init_format_functions(struct ilo_screen *is);
 
+int
+ilo_translate_color_format(enum pipe_format format);
+
+/**
+ * Translate a pipe format to a hardware surface format suitable for
+ * the given purpose.  Return -1 on errors.
+ *
+ * This is an inline function not only for performance reasons.  There are
+ * caveats that the callers should that before calling this function.
+ */
+static inline int
+ilo_translate_format(enum pipe_format format, unsigned bind)
+{
+   switch (bind) {
+   case PIPE_BIND_RENDER_TARGET:
+      /*
+       * Some RGBX formats are not supported as render target formats.  But we
+       * can use their RGBA counterparts and force the destination alpha to be
+       * one when blending is enabled.
+       */
+      switch (format) {
+      case PIPE_FORMAT_B8G8R8X8_UNORM:
+         return BRW_SURFACEFORMAT_B8G8R8A8_UNORM;
+      default:
+         return ilo_translate_color_format(format);
+      }
+      break;
+   case PIPE_BIND_SAMPLER_VIEW:
+      /*
+       * For depth formats, we want the depth values to be returned as R
+       * values.  But we assume in many places that the depth values are
+       * returned as I values (util_make_fragment_tex_shader_writedepth() is
+       * one such example).  We have to live with that at least for now.
+       *
+       * For ETC1 format, the texture data will be decompressed before being
+       * written to the bo.  See tex_staging_sys_convert_write().
+       */
+      switch (format) {
+      case PIPE_FORMAT_Z16_UNORM:
+         return BRW_SURFACEFORMAT_I16_UNORM;
+      case PIPE_FORMAT_Z32_FLOAT:
+         return BRW_SURFACEFORMAT_I32_FLOAT;
+      case PIPE_FORMAT_Z24X8_UNORM:
+      case PIPE_FORMAT_Z24_UNORM_S8_UINT:
+         return BRW_SURFACEFORMAT_I24X8_UNORM;
+      case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
+         return BRW_SURFACEFORMAT_I32X32_FLOAT;
+      case PIPE_FORMAT_ETC1_RGB8:
+         return BRW_SURFACEFORMAT_R8G8B8X8_UNORM;
+      default:
+         return ilo_translate_color_format(format);
+      }
+      break;
+   case PIPE_BIND_VERTEX_BUFFER:
+      /*
+       * Some 3-component formats are not supported as vertex element formats.
+       * But since we move between vertices using vb->stride, we should be
+       * good to use their 4-component counterparts if we force the W
+       * component to be one.  The only exception is that the vb boundary
+       * check for the last vertex may fail.
+       */
+      switch (format) {
+      case PIPE_FORMAT_R16G16B16_FLOAT:
+         return BRW_SURFACEFORMAT_R16G16B16A16_FLOAT;
+      case PIPE_FORMAT_R16G16B16_UINT:
+         return BRW_SURFACEFORMAT_R16G16B16A16_UINT;
+      case PIPE_FORMAT_R16G16B16_SINT:
+         return BRW_SURFACEFORMAT_R16G16B16A16_SINT;
+      case PIPE_FORMAT_R8G8B8_UINT:
+         return BRW_SURFACEFORMAT_R8G8B8A8_UINT;
+      case PIPE_FORMAT_R8G8B8_SINT:
+         return BRW_SURFACEFORMAT_R8G8B8A8_SINT;
+      default:
+         return ilo_translate_color_format(format);
+      }
+      break;
+   default:
+      assert(!"cannot translate format");
+      break;
+   }
+
+   return -1;
+}
+
+static inline int
+ilo_translate_render_format(enum pipe_format format)
+{
+   return ilo_translate_format(format, PIPE_BIND_RENDER_TARGET);
+}
+
+static inline int
+ilo_translate_texture_format(enum pipe_format format)
+{
+   return ilo_translate_format(format, PIPE_BIND_SAMPLER_VIEW);
+}
+
+static inline int
+ilo_translate_vertex_format(enum pipe_format format)
+{
+   return ilo_translate_format(format, PIPE_BIND_VERTEX_BUFFER);
+}
+
 #endif /* ILO_FORMAT_H */