sis_tex.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

	  &_mesa_texformat_argb8888 : &_mesa_texformat_argb1555;

   case GL_RGBA4:
   case GL_RGBA2:
      return &_mesa_texformat_argb4444;

   case GL_RGB5_A1:
      return &_mesa_texformat_argb1555;

   case GL_RGB8:
   case GL_RGB10:
   case GL_RGB12:
   case GL_RGB16:
      return !force16bpt ? &_mesa_texformat_argb8888 : &_mesa_texformat_rgb565;

   case GL_RGB5:
   case GL_RGB4:
      return &_mesa_texformat_rgb565;

   case GL_R3_G3_B2:
      return &_mesa_texformat_rgb332;

   case GL_ALPHA:
   case GL_ALPHA4:		/* FIXME: This could use its own texstore */
   case GL_ALPHA8:
   case GL_ALPHA12:
   case GL_ALPHA16:
   case GL_COMPRESSED_ALPHA:
      return &_mesa_texformat_a8;

   case 1:
   case GL_LUMINANCE:
   case GL_LUMINANCE4:		/* FIXME: This could use its own texstore */
   case GL_LUMINANCE8:
   case GL_LUMINANCE12:
   case GL_LUMINANCE16:
   case GL_COMPRESSED_LUMINANCE:
      return &_mesa_texformat_l8;

   case 2:
   case GL_LUMINANCE_ALPHA:
   case GL_LUMINANCE4_ALPHA4:	/* FIXME: This could use its own texstore */
   case GL_LUMINANCE6_ALPHA2:	/* FIXME: This could use its own texstore */
   case GL_LUMINANCE8_ALPHA8:
   case GL_LUMINANCE12_ALPHA4:	/* FIXME: This could use its own texstore */
   case GL_LUMINANCE12_ALPHA12:
   case GL_LUMINANCE16_ALPHA16:
   case GL_COMPRESSED_LUMINANCE_ALPHA:
      return &_mesa_texformat_al88;

   case GL_INTENSITY:
   case GL_INTENSITY4:
   case GL_INTENSITY8:
   case GL_INTENSITY12:
   case GL_INTENSITY16:
   case GL_COMPRESSED_INTENSITY:
      return &_mesa_texformat_i8;

   case GL_YCBCR_MESA:
      if (type == GL_UNSIGNED_SHORT_8_8_APPLE ||
          type == GL_UNSIGNED_BYTE)
         return &_mesa_texformat_ycbcr;
      else
         return &_mesa_texformat_ycbcr_rev;

   default:
      _mesa_problem(ctx, "unexpected format in sisDDChooseTextureFormat: %d",
         internalFormat);
      return NULL;
   }
}

static void sisTexImage1D( GLcontext *ctx, GLenum target, GLint level,
			     GLint internalFormat,
			     GLint width, GLint border,
			     GLenum format, GLenum type, const GLvoid *pixels,
			     const struct gl_pixelstore_attrib *packing,
			     struct gl_texture_object *texObj,
			     struct gl_texture_image *texImage )
{
   sisContextPtr smesa = SIS_CONTEXT(ctx);
   sisTexObjPtr t;

   if ( texObj->DriverData == NULL )
      sisAllocTexObj( texObj );
   t = texObj->DriverData;

   /* Note, this will call sisChooseTextureFormat */
   _mesa_store_teximage1d( ctx, target, level, internalFormat,
			   width, border, format, type,
			   pixels, packing, texObj, texImage );

   /* Allocate offscreen space for the texture */
   sisFreeTexImage(smesa, t, level);
   sisAllocTexImage(smesa, t, level, texImage);

   /* Upload the texture */
   WaitEngIdle(smesa);
   memcpy(t->image[level].Data, texImage->Data, t->image[level].size);
   
   if (smesa->PrevTexFormat[ctx->Texture.CurrentUnit] != t->format)
   {
      smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURE_ENV;
      smesa->PrevTexFormat[ctx->Texture.CurrentUnit] = t->format;
   }
   smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURING;
}


static void sisTexSubImage1D( GLcontext *ctx,
				GLenum target,
				GLint level,
				GLint xoffset,
				GLsizei width,
				GLenum format, GLenum type,
				const GLvoid *pixels,
				const struct gl_pixelstore_attrib *packing,
				struct gl_texture_object *texObj,
				struct gl_texture_image *texImage )
{
   sisContextPtr smesa = SIS_CONTEXT(ctx);
   sisTexObjPtr t;
   GLuint copySize;
   GLint texelBytes;
   const char *src;
   GLubyte *dst;

   if ( texObj->DriverData == NULL )
      sisAllocTexObj( texObj );
   t = texObj->DriverData;

   _mesa_store_texsubimage1d(ctx, target, level, xoffset, width,
			     format, type, pixels, packing, texObj,
			     texImage);

   /* Allocate offscreen space for the texture */
   sisFreeTexImage(smesa, t, level);
   sisAllocTexImage(smesa, t, level, texImage);

   /* Upload the texture */
   WaitEngIdle(smesa);
   texelBytes = texImage->TexFormat->TexelBytes;

   copySize = width * texelBytes;
   src = (char *)texImage->Data + xoffset * texelBytes;
   dst = t->image[level].Data + xoffset * texelBytes;

   memcpy( dst, src, copySize );

   smesa->clearTexCache = GL_TRUE;

   if (smesa->PrevTexFormat[ctx->Texture.CurrentUnit] != t->format)
   {
      smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURE_ENV;
      smesa->PrevTexFormat[ctx->Texture.CurrentUnit] = t->format;
   }
   smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURING;
}

static void sisTexImage2D( GLcontext *ctx, GLenum target, GLint level,
			     GLint internalFormat,
			     GLint width, GLint height, GLint border,
			     GLenum format, GLenum type, const GLvoid *pixels,
			     const struct gl_pixelstore_attrib *packing,
			     struct gl_texture_object *texObj,
			     struct gl_texture_image *texImage )
{
   sisContextPtr smesa = SIS_CONTEXT(ctx);
   sisTexObjPtr t;

   if ( texObj->DriverData == NULL )
      sisAllocTexObj( texObj );
   t = texObj->DriverData;

   /* Note, this will call sisChooseTextureFormat */
   _mesa_store_teximage2d(ctx, target, level, internalFormat,
                          width, height, border, format, type, pixels,
                          &ctx->Unpack, texObj, texImage);

   /* Allocate offscreen space for the texture */
   sisFreeTexImage(smesa, t, level);
   sisAllocTexImage(smesa, t, level, texImage);

   /* Upload the texture */
   WaitEngIdle(smesa);
   memcpy(t->image[level].Data, texImage->Data, t->image[level].size);
   
   if (smesa->PrevTexFormat[ctx->Texture.CurrentUnit] != t->format)
   {
      smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURE_ENV;
      smesa->PrevTexFormat[ctx->Texture.CurrentUnit] = t->format;
   }
   smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURING;
}

static void sisTexSubImage2D( GLcontext *ctx,
				GLenum target,
				GLint level,
				GLint xoffset, GLint yoffset,
				GLsizei width, GLsizei height,
				GLenum format, GLenum type,
				const GLvoid *pixels,
				const struct gl_pixelstore_attrib *packing,
				struct gl_texture_object *texObj,
				struct gl_texture_image *texImage )
{
   sisContextPtr smesa = SIS_CONTEXT(ctx);
   sisTexObjPtr t;
   GLuint copySize;
   GLint texelBytes;
   const char *src;
   GLubyte *dst;
   int j;
   GLuint soffset;

   if ( texObj->DriverData == NULL )
      sisAllocTexObj( texObj );
   t = texObj->DriverData;

   _mesa_store_texsubimage2d(ctx, target, level, xoffset, yoffset, width,
			     height, format, type, pixels, packing, texObj,
			     texImage);

   /* Allocate offscreen space for the texture */
   sisFreeTexImage(smesa, t, level);
   sisAllocTexImage(smesa, t, level, texImage);

   /* Upload the texture */
   WaitEngIdle(smesa);
   texelBytes = texImage->TexFormat->TexelBytes;

   copySize = width * texelBytes;
   src = (char *)texImage->Data + (xoffset + yoffset * texImage->Width) *
      texelBytes;
   dst = t->image[level].Data + (xoffset + yoffset * texImage->Width) *
      texelBytes;
   soffset = texImage->Width * texelBytes;

   for (j = yoffset; j < yoffset + height; j++) {
      memcpy( dst, src, copySize );
      src += soffset;
      dst += soffset;
   }

   smesa->clearTexCache = GL_TRUE;

   if (smesa->PrevTexFormat[ctx->Texture.CurrentUnit] != t->format)
   {
      smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURE_ENV;
      smesa->PrevTexFormat[ctx->Texture.CurrentUnit] = t->format;
   }
   smesa->TexStates[ctx->Texture.CurrentUnit] |= NEW_TEXTURING;
}


/**
 * Allocate a new texture object.
 * Called via ctx->Driver.NewTextureObject.
 * Note: this function will be called during context creation to
 * allocate the default texture objects.
 * Note: we could use containment here to 'derive' the driver-specific
 * texture object from the core mesa gl_texture_object.  Not done at this time.
 */
static struct gl_texture_object *
sisNewTextureObject( GLcontext *ctx, GLuint name, GLenum target )
{
   struct gl_texture_object *obj;
   obj = _mesa_new_texture_object(ctx, name, target);
   return obj;
}


void sisInitTextureFuncs( struct dd_function_table *functions )
{
   functions->TexEnv			= sisTexEnv;
   functions->ChooseTextureFormat	= sisChooseTextureFormat;
   functions->TexImage1D		= sisTexImage1D;
   functions->TexSubImage1D		= sisTexSubImage1D;
   functions->TexImage2D		= sisTexImage2D;
   functions->TexSubImage2D		= sisTexSubImage2D;
   functions->TexParameter		= sisTexParameter;
   functions->BindTexture		= sisBindTexture;
   functions->NewTextureObject		= sisNewTextureObject;
   functions->DeleteTexture		= sisDeleteTexture;
   functions->IsTextureResident	= sisIsTextureResident;
}