r300_texstate.c

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

	texelBytes = baseImage->TexFormat->TexelBytes;

	/* Compute which mipmap levels we really want to send to the hardware.
	 */
	driCalculateTextureFirstLastLevel((driTextureObject *) t);
	log2Width = tObj->Image[0][t->base.firstLevel]->WidthLog2;
	log2Height = tObj->Image[0][t->base.firstLevel]->HeightLog2;
	log2Depth = tObj->Image[0][t->base.firstLevel]->DepthLog2;

	numLevels = t->base.lastLevel - t->base.firstLevel + 1;

	assert(numLevels <= RADEON_MAX_TEXTURE_LEVELS);

	/* Calculate mipmap offsets and dimensions for blitting (uploading)
	 * The idea is that we lay out the mipmap levels within a block of
	 * memory organized as a rectangle of width BLIT_WIDTH_BYTES.
	 */
	t->tile_bits = 0;

	/* figure out if this texture is suitable for tiling. */
#if 0				/* Disabled for now */
	if (texelBytes) {
		if ((tObj->Target != GL_TEXTURE_RECTANGLE_NV) &&
		    /* texrect might be able to use micro tiling too in theory? */
		    (baseImage->Height > 1)) {

			/* allow 32 (bytes) x 1 mip (which will use two times the space
			   the non-tiled version would use) max if base texture is large enough */
			if ((numLevels == 1) ||
			    (((baseImage->Width * texelBytes /
			       baseImage->Height) <= 32)
			     && (baseImage->Width * texelBytes > 64))
			    ||
			    ((baseImage->Width * texelBytes /
			      baseImage->Height) <= 16)) {
				t->tile_bits |= R300_TXO_MICRO_TILE;
			}
		}

		if (tObj->Target != GL_TEXTURE_RECTANGLE_NV) {
			/* we can set macro tiling even for small textures, they will be untiled anyway */
			t->tile_bits |= R300_TXO_MACRO_TILE;
		}
	}
#endif

	curOffset = 0;

	if (tObj->Target == GL_TEXTURE_CUBE_MAP) {
		ASSERT(log2Width == log2Height);
		t->format |= R300_TX_FORMAT_CUBIC_MAP;

		for(i = 0; i < numLevels; i++) {
			GLuint face;
			for(face = 0; face < 6; face++)
				compute_tex_image_offset(tObj, face, i, &curOffset);
		}
	} else {
		if (tObj->Target == GL_TEXTURE_3D)
                	t->format |= R300_TX_FORMAT_3D;

		for (i = 0; i < numLevels; i++)
			compute_tex_image_offset(tObj, 0, i, &curOffset);
	}

	/* Align the total size of texture memory block.
	 */
	t->base.totalSize =
	    (curOffset + RADEON_OFFSET_MASK) & ~RADEON_OFFSET_MASK;

	t->size =
	    (((tObj->Image[0][t->base.firstLevel]->Width -
	       1) << R300_TX_WIDTHMASK_SHIFT)
	     | ((tObj->Image[0][t->base.firstLevel]->Height - 1) <<
		R300_TX_HEIGHTMASK_SHIFT)
	     | ((tObj->Image[0][t->base.firstLevel]->DepthLog2) <<
		R300_TX_DEPTHMASK_SHIFT))
	    | ((numLevels - 1) << R300_TX_MAX_MIP_LEVEL_SHIFT);

	t->pitch = 0;

	/* Only need to round to nearest 32 for textures, but the blitter
	 * requires 64-byte aligned pitches, and we may/may not need the
	 * blitter.   NPOT only!
	 */
	if (baseImage->IsCompressed) {
		t->pitch |=
		    (tObj->Image[0][t->base.firstLevel]->Width + 63) & ~(63);
	} else if (tObj->Target == GL_TEXTURE_RECTANGLE_NV) {
		unsigned int align = (64 / texelBytes) - 1;
		t->pitch |= ((tObj->Image[0][t->base.firstLevel]->Width *
			     texelBytes) + 63) & ~(63);
		t->size |= R300_TX_SIZE_TXPITCH_EN;
		if (!t->image_override)
			t->pitch_reg =
			    (((tObj->Image[0][t->base.firstLevel]->Width) +
			      align) & ~align) - 1;
	} else {
		t->pitch |=
		    ((tObj->Image[0][t->base.firstLevel]->Width *
		      texelBytes) + 63) & ~(63);
	}

	if (rmesa->radeon.radeonScreen->chip_family >= CHIP_FAMILY_RV515) {
	    if (tObj->Image[0][t->base.firstLevel]->Width > 2048)
		t->pitch_reg |= R500_TXWIDTH_BIT11;
	    if (tObj->Image[0][t->base.firstLevel]->Height > 2048)
		t->pitch_reg |= R500_TXHEIGHT_BIT11;
	}
}

/* ================================================================
 * Texture unit state management
 */

static GLboolean r300EnableTexture2D(GLcontext * ctx, int unit)
{
	r300ContextPtr rmesa = R300_CONTEXT(ctx);
	struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
	struct gl_texture_object *tObj = texUnit->_Current;
	r300TexObjPtr t = (r300TexObjPtr) tObj->DriverData;

	ASSERT(tObj->Target == GL_TEXTURE_2D || tObj->Target == GL_TEXTURE_1D);

	if (t->base.dirty_images[0]) {
		R300_FIREVERTICES(rmesa);

		r300SetTexImages(rmesa, tObj);
		r300UploadTexImages(rmesa, (r300TexObjPtr) tObj->DriverData, 0);
		if (!t->base.memBlock && !t->image_override)
			return GL_FALSE;
	}

	return GL_TRUE;
}

static GLboolean r300EnableTexture3D(GLcontext * ctx, int unit)
{
	r300ContextPtr rmesa = R300_CONTEXT(ctx);
	struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
	struct gl_texture_object *tObj = texUnit->_Current;
	r300TexObjPtr t = (r300TexObjPtr) tObj->DriverData;

	ASSERT(tObj->Target == GL_TEXTURE_3D);

	/* r300 does not support mipmaps for 3D textures. */
	if ((tObj->MinFilter != GL_NEAREST) && (tObj->MinFilter != GL_LINEAR)) {
		return GL_FALSE;
	}

	if (t->base.dirty_images[0]) {
		R300_FIREVERTICES(rmesa);
		r300SetTexImages(rmesa, tObj);
		r300UploadTexImages(rmesa, (r300TexObjPtr) tObj->DriverData, 0);
		if (!t->base.memBlock)
			return GL_FALSE;
	}

	return GL_TRUE;
}

static GLboolean r300EnableTextureCube(GLcontext * ctx, int unit)
{
	r300ContextPtr rmesa = R300_CONTEXT(ctx);
	struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
	struct gl_texture_object *tObj = texUnit->_Current;
	r300TexObjPtr t = (r300TexObjPtr) tObj->DriverData;
	GLuint face;

	ASSERT(tObj->Target == GL_TEXTURE_CUBE_MAP);

	if (t->base.dirty_images[0] || t->base.dirty_images[1] ||
	    t->base.dirty_images[2] || t->base.dirty_images[3] ||
	    t->base.dirty_images[4] || t->base.dirty_images[5]) {
		/* flush */
		R300_FIREVERTICES(rmesa);
		/* layout memory space, once for all faces */
		r300SetTexImages(rmesa, tObj);
	}

	/* upload (per face) */
	for (face = 0; face < 6; face++) {
		if (t->base.dirty_images[face]) {
			r300UploadTexImages(rmesa,
					    (r300TexObjPtr) tObj->DriverData,
					    face);
		}
	}

	if (!t->base.memBlock) {
		/* texmem alloc failed, use s/w fallback */
		return GL_FALSE;
	}

	return GL_TRUE;
}

static GLboolean r300EnableTextureRect(GLcontext * ctx, int unit)
{
	r300ContextPtr rmesa = R300_CONTEXT(ctx);
	struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
	struct gl_texture_object *tObj = texUnit->_Current;
	r300TexObjPtr t = (r300TexObjPtr) tObj->DriverData;

	ASSERT(tObj->Target == GL_TEXTURE_RECTANGLE_NV);

	if (t->base.dirty_images[0]) {
		R300_FIREVERTICES(rmesa);

		r300SetTexImages(rmesa, tObj);
		r300UploadTexImages(rmesa, (r300TexObjPtr) tObj->DriverData, 0);
		if (!t->base.memBlock && !t->image_override &&
		    !rmesa->prefer_gart_client_texturing)
			return GL_FALSE;
	}

	return GL_TRUE;
}

static GLboolean r300UpdateTexture(GLcontext * ctx, int unit)
{
	r300ContextPtr rmesa = R300_CONTEXT(ctx);
	struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];
	struct gl_texture_object *tObj = texUnit->_Current;
	r300TexObjPtr t = (r300TexObjPtr) tObj->DriverData;

	/* Fallback if there's a texture border */
	if (tObj->Image[0][tObj->BaseLevel]->Border > 0)
		return GL_FALSE;

	/* Update state if this is a different texture object to last
	 * time.
	 */
	if (rmesa->state.texture.unit[unit].texobj != t) {
		if (rmesa->state.texture.unit[unit].texobj != NULL) {
			/* The old texture is no longer bound to this texture unit.
			 * Mark it as such.
			 */

			rmesa->state.texture.unit[unit].texobj->base.bound &=
			    ~(1 << unit);
		}

		rmesa->state.texture.unit[unit].texobj = t;
		t->base.bound |= (1 << unit);
		driUpdateTextureLRU((driTextureObject *) t);	/* XXX: should be locked! */
	}

	return !t->border_fallback;
}

void r300SetTexOffset(__DRIcontext * pDRICtx, GLint texname,
		      unsigned long long offset, GLint depth, GLuint pitch)
{
	r300ContextPtr rmesa = pDRICtx->driverPrivate;
	struct gl_texture_object *tObj =
	    _mesa_lookup_texture(rmesa->radeon.glCtx, texname);
	r300TexObjPtr t;
	uint32_t pitch_val;

	if (!tObj)
		return;

	t = (r300TexObjPtr) tObj->DriverData;

	t->image_override = GL_TRUE;

	if (!offset)
		return;

	t->offset = offset;
	t->pitch_reg &= (1 << 13) -1;
	pitch_val = pitch;

	switch (depth) {
	case 32:
		t->format = R300_EASY_TX_FORMAT(X, Y, Z, W, W8Z8Y8X8);
		t->filter |= tx_table[2].filter;
		pitch_val /= 4;
		break;
	case 24:
	default:
		t->format = R300_EASY_TX_FORMAT(X, Y, Z, ONE, W8Z8Y8X8);
		t->filter |= tx_table[4].filter;
		pitch_val /= 4;
		break;
	case 16:
		t->format = R300_EASY_TX_FORMAT(X, Y, Z, ONE, Z5Y6X5);
		t->filter |= tx_table[5].filter;
		pitch_val /= 2;
		break;
	}
	pitch_val--;

	t->pitch_reg |= pitch_val;
}

static GLboolean r300UpdateTextureUnit(GLcontext * ctx, int unit)
{
	struct gl_texture_unit *texUnit = &ctx->Texture.Unit[unit];

	if (texUnit->_ReallyEnabled & (TEXTURE_RECT_BIT)) {
		return (r300EnableTextureRect(ctx, unit) &&
			r300UpdateTexture(ctx, unit));
	} else if (texUnit->_ReallyEnabled & (TEXTURE_1D_BIT | TEXTURE_2D_BIT)) {
		return (r300EnableTexture2D(ctx, unit) &&
			r300UpdateTexture(ctx, unit));
	} else if (texUnit->_ReallyEnabled & (TEXTURE_3D_BIT)) {
		return (r300EnableTexture3D(ctx, unit) &&
			r300UpdateTexture(ctx, unit));
	} else if (texUnit->_ReallyEnabled & (TEXTURE_CUBE_BIT)) {
		return (r300EnableTextureCube(ctx, unit) &&
			r300UpdateTexture(ctx, unit));
	} else if (texUnit->_ReallyEnabled) {
		return GL_FALSE;
	} else {
		return GL_TRUE;
	}
}

void r300UpdateTextureState(GLcontext * ctx)
{
	int i;

	for (i = 0; i < 8; i++) {
		if (!r300UpdateTextureUnit(ctx, i)) {
			_mesa_warning(ctx,
				      "failed to update texture state for unit %d.\n",
				      i);
		}
	}
}